## @file
# Implementation of Chart::Base
#
# written by
# @author david bonner (dbonner@cs.bu.edu)
#
# maintained by the
# @author Chart Group at Geodetic Fundamental Station Wettzell (Chart@fs.wettzell.de)
# @date 2012-01-06
# @version 2.4.4
## @mainpage Chart::Base
#
# Basic Class of Chart from which all the other classes are derived.
## @class Chart::Base
# @brief Base class for Chart; all other classes derived from here
#
# Base class from which all other classes are derived.
# This class provides all functions which are common for
# all classes
package Chart::Base;
# Uses
# GD
# Carp
# FileHandle
use GD;
use Carp;
use FileHandle;
use Chart::Constants;
$Chart::Base::VERSION = '2.4.4';
use vars qw(%named_colors);
use strict;
#>>>>>>>>>>>>>>>>>>>>>>>>>>#
# public methods go here #
#<<<<<<<<<<<<<<<<<<<<<<<<<<#
## @cmethod object new()
# @return A new object.
#
# @brief
# Standard normal constructor.\n
# Calls
# @see _init
sub new
{
my $proto = shift;
my $class = ref($proto) || $proto;
my $self = {};
bless $self, $class;
$self->_init(@_);
return $self;
}
## @method int set(%opts)
# Set all options
#
# @details
# main method for customizing the chart, lets users
# specify values for different parameters\n
# The options are saved locally to be able to output them
# via @see getopts()
#
# @param[in] %opts Hash of options to the Chart
# @return ok or croak
#
sub set
{
my $self = shift;
my %opts = @_;
# basic error checking on the options, just warn 'em
unless ( $#_ % 2 )
{
carp "Whoops, some option to be set didn't have a value.\n", "You might want to look at that.\n";
}
# set the options
for ( keys %opts )
{
$self->{$_} = $opts{$_};
$self->{saveopts}->{$_} = $opts{$_};
# if someone wants to change the grid_lines color, we should set all
# the colors of the grid_lines
if ( $_ =~ /^colors$/ )
{
my %hash = %{ $opts{$_} };
foreach my $key ( sort keys %hash )
{
if ( $key =~ /^grid_lines$/ )
{
# ORIG:
#$self->{'colors'}{'y_grid_lines'} = $hash{'grid_lines'},
# $self->{'colors'}{'x_grid_lines'} = $hash{'grid_lines'},
# $self->{'colors'}{'y2_grid_lines'} = $hash{'grid_lines'};
#
# NEW!!!!!!!!!!!!!!!!!!
if ( ref( $hash{'grid_lines'} ) eq 'ARRAY' )
{
my @aLocal = ( $hash{'grid_lines'}[0], $hash{'grid_lines'}[1], $hash{'grid_lines'}[2] );
$self->{'colors'}{'y_grid_lines'} = [@aLocal];
$self->{'colors'}{'x_grid_lines'} = [@aLocal];
$self->{'colors'}{'y2_grid_lines'} = [@aLocal];
}
elsif ( ref( \$hash{'grid_lines'} ) eq 'SCALAR' )
{
my $sLocal = $hash{'grid_lines'};
$self->{'colors'}{'y_grid_lines'} = $sLocal;
$self->{'colors'}{'x_grid_lines'} = $sLocal;
$self->{'colors'}{'y2_grid_lines'} = $sLocal;
}
else
{
carp "colors{'grid_lines'} is not SCALAR and not ARRAY\n";
}
}
}
}
}
# now return
return 1;
}
## @method hash getopts()
# @return hash of all set options so far
#
# @brief
# get all options
#
# @details
# @return set options as a hash
sub getopts
{
my $self = shift;
my %opts = ();
foreach ( keys %{ $self->{saveopts} } )
{
$opts{$_} = $self->{saveopts};
}
return %opts;
}
## @method int add_pt(@data)
# Graph API\n
# Add one dataset (as a list) to the dataref
#
# @param @data Dataset to add
## @method add_pt(\@data)
# Graph API\n
# Add one dataset (as a reference to a list) to the dataref
# via
#
# for ( 0 .. $#data )
# {
# push @{ $self->{'dataref'}->[$_] }, $data[$_];
# }
#
#
# @param \@data Dataset to add
#
sub add_pt
{
my $self = shift;
my @data = ();
if ( ( ref $_[0] ) =~ /^ARRAY/ )
{
my $rdata = shift;
@data = @$rdata if defined @$rdata;
}
elsif ( ( ref \$_[0] ) =~ /^SCALAR/ )
{
if ( defined $_[0] )
{
@data = @_;
}
}
else
{
croak "Not an array or reference to array";
}
# error check the data (carp, don't croak)
if ( $self->{'dataref'} && ( $#{ $self->{'dataref'} } != $#data ) )
{
carp "New point to be added has an incorrect number of data sets";
return 0;
}
# copy it into the dataref
for ( 0 .. $#data )
{
push @{ $self->{'dataref'}->[$_] }, $data[$_];
}
# now return
return 1;
}
## @method int add_dataset(@data)
# Graph API\n
# Add many datasets (implemented as a list)
# to the dataref,
#
# @param @data Dataset (list) to add
## @method int add_dataset(\@data)
# Graph API\n
# Add many datasets (implemented as a references to alist)
# to the dataref,
#
# @param \@data Dataset (reference to a list) to add
sub add_dataset
{
my $self = shift;
my @data = ();
if ( ( ref $_[0] ) =~ /^ARRAY/ )
{
my $rdata = shift;
@data = @$rdata if defined @$rdata;
}
elsif ( ( ref \$_[0] ) =~ /^SCALAR/ )
{
if ( defined $_[0] )
{
@data = @_;
}
}
else
{
croak "Not an array or reference to array";
return;
}
# error check the data (carp, don't croak)
if ( $self->{'dataref'} && ( $#{ $self->{'dataref'}->[0] } != $#data ) )
{
carp "New data set to be added has an incorrect number of points";
}
# copy it into the dataref
push @{ $self->{'dataref'} }, [@data];
# now return
return 1;
}
## @method int add_datafile($filename,$format)
# Graph API\n
# it's also possible to add a complete datafile\n
# Uses
# @see add_pt
# @see add_dataset
#
# @param[in] $filename Name of file which contents is to be added
# @param[in] $format 'pt' or 'set' to distiguish between function add_pt() in case of 'pt'
# or function add_dataset() in case of 'set'
sub add_datafile
{
my $self = shift;
my $filename = shift;
my $format = shift;
my ( $File, @array );
# do some ugly checking to see if they gave me
# a filehandle or a file name
if ( ( ref \$filename ) eq 'SCALAR' )
{
# they gave me a file name
open( $File, $filename ) or croak "Can't open the datafile: $filename.\n";
}
elsif ( ( ref \$filename ) =~ /^(?:REF|GLOB)$/ )
{
# either a FileHandle object or a regular file handle
$File = $filename;
}
else
{
carp "I'm not sure what kind of datafile you gave me,\n", "but it wasn't a filename or a filehandle.\n";
}
#add the data
while (<$File>)
{
@array = split;
if ( $#array > -1 )
{
if ( $format =~ m/^pt$/i )
{
$self->add_pt(@array);
}
elsif ( $format =~ m/^set$/i )
{
$self->add_dataset(@array);
}
else
{
carp "Tell me what kind of file you gave me: 'pt' or 'set'\n";
}
}
}
close($File);
}
## @method int clear_data()
# Clear Graph API (by undefining 'dataref'
# @return Status of function
sub clear_data
{
my $self = shift;
# undef the internal data reference
$self->{'dataref'} = undef;
# now return
return 1;
}
## @method arrayref get_data()
# Get array of data of the last graph
# @return Reference to data set of the last graph
sub get_data
{
my $self = shift;
my $ref = [];
my ( $i, $j );
# give them a copy, not a reference into the object
for $i ( 0 .. $#{ $self->{'dataref'} } )
{
@{ $ref->[$i] } = @{ $self->{'dataref'}->[$i] }
## speedup, compared to...
# for $j (0..$#{$self->{'dataref'}->[$i]}) {
# $ref->[$i][$j] = $self->{'dataref'}->[$i][$j];
# }
}
# return it
return $ref;
}
## @method int png($file, $dataref)
# Produce the graph of options set in png format.
#
# called after the options are set, this method
# invokes all my private methods to actually
# draw the chart and plot the data
# @see _set_colors
# @see _copy_data
# @see _check_data
# @see _draw
# @param[in] $file Name of file to write graph to
# @param[in] $dataref Reference to external data space
# @return Status of the plot
sub png
{
my $self = shift;
my $file = shift;
my $dataref = shift;
my $fh;
# do some ugly checking to see if they gave me
# a filehandle or a file name
if ( ( ref \$file ) eq 'SCALAR' )
{
# they gave me a file name
# Try to delete an existing file
if ( -f $file )
{
my $number_deleted_files = unlink $file;
if ( $number_deleted_files != 1 )
{
croak "Error: File \"$file\" did already exist, but it failed to delete it";
}
}
$fh = FileHandle->new(">$file");
if ( !defined $fh )
{
croak "Error: File \"$file\" could not be created!\n";
}
}
elsif ( ( ref \$file ) =~ /^(?:REF|GLOB)$/ )
{
# either a FileHandle object or a regular file handle
$fh = $file;
}
else
{
croak "I'm not sure what you gave me to write this png to,\n", "but it wasn't a filename or a filehandle.\n";
}
# allocate the background color
$self->_set_colors();
# make sure the object has its copy of the data
$self->_copy_data($dataref);
# do a sanity check on the data, and collect some basic facts
# about the data
$self->_check_data();
# pass off the real work to the appropriate subs
$self->_draw();
# now write it to the file handle, and don't forget
# to be nice to the poor ppl using nt
binmode $fh;
print $fh $self->{'gd_obj'}->png();
# now exit
return 1;
}
## @method int cgi_png($dataref)
# Produce the graph of options set in png format to be directly
# written for CGI.
#
# called after the options are set, this method
# invokes all my private methods to actually
# draw the chart and plot the data
# @param $dataref
# @return Status of the plot
sub cgi_png
{
my $self = shift;
my $dataref = shift;
# allocate the background color
$self->_set_colors();
# make sure the object has its copy of the data
$self->_copy_data($dataref);
# do a sanity check on the data, and collect some basic facts
# about the data
$self->_check_data();
# pass off the real work to the appropriate subs
$self->_draw();
# print the header (ripped the crlf octal from the CGI module)
if ( $self->true( $self->{no_cache} ) )
{
print "Content-type: image/png\015\012Pragma: no-cache\015\012\015\012";
}
else
{
print "Content-type: image/png\015\012\015\012";
}
# now print the png, and binmode it first so Windows-XX likes us
binmode STDOUT;
print STDOUT $self->{'gd_obj'}->png();
# now exit
return 1;
}
## @method int scalar_png($dataref)
# Produce the graph of options set in png format to be directly
# written for CGI.
#
# Called after the options are set, \n
# this method invokes all my private methods to actually
# draw the chart and plot the data
# @param[in] $dataref Reference to the data to be plotted
# @return Status of the plot
sub scalar_png
{
my $self = shift;
my $dataref = shift;
#allocate the background color
$self->_set_colors();
# make sure the object has its copy of the data
$self->_copy_data($dataref);
# do a sanity check on the data, and collect some basic facts
# about the data
$self->_check_data();
# pass off the real work to the appropriate subs
$self->_draw();
# returns the png image as a scalar value, so that
# the programmer/user can do whatever the she/he wants to with it
$self->{'gd_obj'}->png();
return 1;
}
## @method int jpeg($file,$dataref)
# Produce the graph of options set in JPG format to be directly plotted.\n
#
# Called after the options are set, this method
# invokes all my private methods to actually
# draw the chart and plot the data.
# The output has the jpeg format in opposite to png format produced by
# @see png
#
# Uses the following private functions:\n
# @see _set_colors
# @see _copy_data
# @see _check_data
# @see _draw
#
# @param[in] $file Name of file to write graph to
# @param[in] $dataref Reference to external data space
# @return Status of the plot
#
sub jpeg
{
my $self = shift;
my $file = shift;
my $dataref = shift;
my $fh;
# do some ugly checking to see if they gave me
# a filehandle or a file name
if ( ( ref \$file ) eq 'SCALAR' )
{
# they gave me a file name
# Try to delete an existing file
if ( -f $file )
{
my $number_deleted_files = unlink $file;
if ( $number_deleted_files != 1 )
{
croak "Error: File \"$file\" did already exist, but it fails to delete it";
}
}
$fh = FileHandle->new(">$file");
if ( !defined $fh )
{
croak "Error: File \"$file\" could not be created!\n";
}
}
elsif ( ( ref \$file ) =~ /^(?:REF|GLOB)$/ )
{
# either a FileHandle object or a regular file handle
$fh = $file;
}
else
{
croak "I'm not sure what you gave me to write this jpeg to,\n", "but it wasn't a filename or a filehandle.\n";
}
# allocate the background color
$self->_set_colors();
# make sure the object has its copy of the data
$self->_copy_data($dataref);
# do a sanity check on the data, and collect some basic facts
# about the data
$self->_check_data;
# pass off the real work to the appropriate subs
$self->_draw();
# now write it to the file handle, and don't forget
# to be nice to the poor ppl using Windows-XX
binmode $fh;
print $fh $self->{'gd_obj'}->jpeg( [100] ); # high quality need
# now exit
return 1;
}
## @method int cgi_jpeg($dataref)
# Produce the graph of options set in JPG format to be directly
# for CGI.
#
# called after the options are set, this method
# invokes all my private methods to actually
# draw the chart and plot the data
# @param $dataref
# @return Status of the plot
sub cgi_jpeg
{
my $self = shift;
my $dataref = shift;
# allocate the background color
$self->_set_colors();
# make sure the object has its copy of the data
$self->_copy_data($dataref);
# do a sanity check on the data, and collect some basic facts
# about the data
$self->_check_data();
# pass off the real work to the appropriate subs
$self->_draw();
# print the header (ripped the crlf octal from the CGI module)
if ( $self->true( $self->{no_cache} ) )
{
print "Content-type: image/jpeg\015\012Pragma: no-cache\015\012\015\012";
}
else
{
print "Content-type: image/jpeg\015\012\015\012";
}
# now print the jpeg, and binmode it first so Windows-XX likes us
binmode STDOUT;
print STDOUT $self->{'gd_obj'}->jpeg( [100] );
# now exit
return 1;
}
## @method int scalar_jpeg($dataref)
# Produce the graph of options set in JPG format to be directly
#
# called after the options are set, this method
# invokes all my private methods to actually
# draw the chart and plot the data
# @param $dataref
# @return Status of the plot
sub scalar_jpeg
{
my $self = shift;
my $dataref = shift;
# allocate the background color
$self->_set_colors();
# make sure the object has its copy of the data
$self->_copy_data($dataref);
# do a sanity check on the data, and collect some basic facts
# about the data
$self->_check_data();
# pass off the real work to the appropriate subs
$self->_draw();
# returns the jpeg image as a scalar value, so that
# the programmer-user can do whatever the heck
# s/he wants to with it
$self->{'gd_obj'}->jpeg( [100] );
}
## @method int make_gd($dataref)
# Produce the graph of options set in GD format to be directly
#
# called after the options are set, this method
# invokes all my private methods to actually
# draw the chart and plot the data
# @param $dataref
# @return Status of the plot
sub make_gd
{
my $self = shift;
my $dataref = shift;
# allocate the background color
$self->_set_colors();
# make sure the object has its copy of the data
$self->_copy_data($dataref);
# do a sanity check on the data, and collect some basic facts
# about the data
$self->_check_data();
# pass off the real work to the appropriate subs
$self->_draw();
# return the GD::Image object that we've drawn into
return $self->{'gd_obj'};
}
## @method imagemap_dump()
# get the information to turn the chart into an imagemap
#
# @return Reference to an array of the image
sub imagemap_dump
{
my $self = shift;
my $ref = [];
my ( $i, $j );
# croak if they didn't ask me to remember the data, or if they're asking
# for the data before I generate it
unless ( ( $self->true( $self->{'imagemap'} ) ) && $self->{'imagemap_data'} )
{
croak "You need to set the imagemap option to true, and then call the png method, before you can get the imagemap data";
}
# can't just return a ref to my internal structures...
for $i ( 0 .. $#{ $self->{'imagemap_data'} } )
{
for $j ( 0 .. $#{ $self->{'imagemap_data'}->[$i] } )
{
$ref->[$i][$j] = [ @{ $self->{'imagemap_data'}->[$i][$j] } ];
}
}
# return their copy
return $ref;
}
## @method minimum(@array)
# determine minimum of an array of values
# @param @array List of numerical values
# @return Minimal value of list of values
sub minimum
{
my $self = shift;
my @array = @_;
return undef if !@array;
my $min = $array[0];
for ( my $iIndex = 0 ; $iIndex < scalar @array ; $iIndex++ )
{
$min = $array[$iIndex] if ( $min > $array[$iIndex] );
}
$min;
}
## @method maximum(@array)
# determine maximum of an array of values
# @param @array List of numerical values
# @return Maximal value of list of values
sub maximum
{
my $self = shift;
my @array = @_;
return undef if !@array;
my $max = $array[0];
for ( my $iIndex = 0 ; $iIndex < scalar @array ; $iIndex++ )
{
$max = $array[$iIndex] if ( $max < $array[$iIndex] );
}
$max;
}
## @method arccos($a)
# Function arccos(a)
# @param $a Value
# @return arccos(a)
sub arccos
{
my $self = shift;
my $a = shift;
return ( atan2( sqrt( 1 - $a * $a ), $a ) );
}
## @method arcsin($a)
# Function arcsin(a)
# @param $a Value
# @return arcsin(a)
sub arcsin
{
my $self = shift;
my $a = shift;
return ( atan2( $a, sqrt( 1 - $a * $a ) ) );
}
## @method true($b)
# determine true value of argument
# @param[in] $b Bool value to check for true
# @return 1 if argument is equal to TRUE, true, 1, t, T, and defined
sub true
{
my $pkg = shift;
my $arg = shift;
if ( !defined($arg) )
{
return 0;
}
if ( $arg eq 'true'
|| $arg eq 'TRUE'
|| $arg eq 't'
|| $arg eq 'T'
|| $arg eq '1' )
{
return 1;
}
return 0;
}
## @method false($b)
# determine false value of argument
# @param[in] $b Bool value to check for true
# @return 1 if argument is equal to false, FALSE, 0, f, F or undefined
sub false
{
my $pkg = shift;
my $arg = shift;
if ( !defined($arg) )
{
return 1;
}
if ( $arg eq 'false'
|| $arg eq 'FALSE'
|| $arg eq 'f'
|| $arg eq 'F'
|| $arg eq '0'
|| $arg eq 'none' )
{
return 1;
}
return 0;
}
#>>>>>>>>>>>>>>>>>>>>>>>>>>>#
# private methods go here #
#<<<<<<<<<<<<<<<<<<<<<<<<<<<#
## @fn private int _init($x,$y)
# Initialize all default options here
# @param[in] $x Width of the final image in pixels (Default: 400)
# @param[in] $y Height of the final image in pixels (Default: 300)
#
sub _init
{
my $self = shift;
my $x = shift || 400; # give them a 400x300 image
my $y = shift || 300; # unless they say otherwise
# get the gd object
# Reference to new GD::Image
$self->{'gd_obj'} = GD::Image->new( $x, $y );
# start keeping track of used space
# actual current y min Value
$self->{'curr_y_min'} = 0;
$self->{'curr_y_max'} = $y; # maximum pixel in y direction (down)
$self->{'curr_x_min'} = 0;
$self->{'curr_x_max'} = $x; # maximum pixel in x direction (right)
# use a 10 pixel border around the whole png
$self->{'png_border'} = 10;
# leave some space around the text fields
$self->{'text_space'} = 2;
# and leave some more space around the chart itself
$self->{'graph_border'} = 10;
# leave a bit of space inside the legend box
$self->{'legend_space'} = 4;
# set some default fonts
$self->{'title_font'} = gdLargeFont,
$self->{'sub_title_font'} = gdLargeFont,
$self->{'legend_font'} = gdSmallFont,
$self->{'label_font'} = gdMediumBoldFont,
$self->{'tick_label_font'} = gdSmallFont;
# put the legend on the bottom of the chart
$self->{'legend'} = 'right';
# default to an empty list of labels
$self->{'legend_labels'} = [];
# use 20 pixel length example lines in the legend
$self->{'legend_example_size'} = 20;
# Set the maximum & minimum number of ticks to use.
$self->{'y_ticks'} = 6,
$self->{'min_y_ticks'} = 6,
$self->{'max_y_ticks'} = 100,
$self->{'x_number_ticks'} = 1,
$self->{'min_x_ticks'} = 6,
$self->{'max_x_ticks'} = 100;
# make the ticks 4 pixels long
$self->{'tick_len'} = 4;
# no custom y tick labels
$self->{'y_tick_labels'} = undef;
# no patterns
$self->{'patterns'} = undef;
# let the lines in Chart::Lines be 6 pixels wide
$self->{'brush_size'} = 6;
# let the points in Chart::Points and Chart::LinesPoints be 18 pixels wide
$self->{'pt_size'} = 18;
# use the old non-spaced bars
$self->{'spaced_bars'} = 'true';
# use the new grey background for the plots
$self->{'grey_background'} = 'true';
# don't default to transparent
$self->{'transparent'} = 'false';
# default to "normal" x_tick drawing
$self->{'x_ticks'} = 'normal';
# we're not a component until Chart::Composite says we are
$self->{'component'} = 'false';
# don't force the y-axes in a Composite chare to be the same
$self->{'same_y_axes'} = 'false';
# plot rectangeles in the legend instead of lines in a composite chart
$self->{'legend_example_height'} = 'false';
# don't force integer y-ticks
$self->{'integer_ticks_only'} = 'false';
# don't forbid a false zero scale.
$self->{'include_zero'} = 'false';
# don't waste time/memory by storing imagemap info unless they ask
$self->{'imagemap'} = 'false';
# default for grid_lines is off
$self->{grid_lines} = 'false',
$self->{x_grid_lines} = 'false',
$self->{y_grid_lines} = 'false',
$self->{y2_grid_lines} = 'false';
# default for no_cache is false. (it breaks netscape 4.5)
$self->{no_cache} = 'false';
# default value for skip_y_ticks for the labels
$self->{skip_y_ticks} = 1;
# default value for skip_int_ticks only for integer_ticks_only
$self->{skip_int_ticks} = 1;
# default value for precision
$self->{precision} = 3;
# default value for legend label values in pie charts
$self->{legend_label_values} = 'value';
# default value for the labels in a pie chart
$self->{label_values} = 'percent';
# default position for the y-axes
$self->{y_axes} = 'left';
# copies of the current values at the x-ticks function
$self->{temp_x_min} = 0;
$self->{temp_x_max} = 0;
$self->{temp_y_min} = 0;
$self->{temp_y_max} = 0;
# Instance for a sum
$self->{sum} = 0;
# Don't sort the data unless they ask
$self->{'sort'} = 'false';
# The Interval for drawing the x-axes in the split module
$self->{'interval'} = undef;
# The start value for the split chart
$self->{'start'} = undef;
# How many ticks do i have to draw at the x-axes in one interval of a split-plot?
$self->{'interval_ticks'} = 6;
# Draw the Lines in the split-chart normal
$self->{'scale'} = 1;
# Make a x-y plot
$self->{'xy_plot'} = 'false';
# min and max for xy plot
$self->{'x_min_val'} = 1;
$self->{'x_max_val'} = 1;
# use the same error value in ErrorBars
$self->{'same_error'} = 'false';
# Set the minimum and maximum number of circles to draw in a direction chart
$self->{'min_circles'} = 4, $self->{'max_circles'} = 100;
# set the style of a direction diagramm
$self->{'point'} = 'true', $self->{'line'} = 'false', $self->{'arrow'} = 'false';
# The number of angel axes in a direction Chart
$self->{'angle_interval'} = 30;
# dont use different 'x_axes' in a direction Chart
$self->{'pairs'} = 'false';
# polarplot for a direction Chart (not yet tested)
$self->{'polar'} = 'false';
# guiding lines in a Pie Chart
$self->{'legend_lines'} = 'false';
# Ring Chart instead of Pie
$self->{'ring'} = 1; # width of ring; i.e. normal pie
# stepline for Lines, LinesPoints
$self->{'stepline'} = 'false';
$self->{'stepline_mode'} = 'end'; # begin, end
# used function to transform x- and y-tick labels to strings
$self->{f_x_tick} = \&_default_f_tick, $self->{f_y_tick} = \&_default_f_tick, $self->{f_z_tick} = \&_default_f_tick;
# default color specs for various color roles.
# Subclasses should extend as needed.
my $d = 0;
$self->{'colors_default_spec'} = {
background => 'white',
misc => 'black',
text => 'black',
y_label => 'black',
y_label2 => 'black',
grid_lines => 'black',
grey_background => 'grey',
(
map { 'dataset' . $d++ => $_ }
qw (red green blue purple peach orange mauve olive pink light_purple light_blue plum yellow turquoise light_green brown
HotPink PaleGreen1 DarkBlue BlueViolet orange2 chocolate1 LightGreen pink light_purple light_blue plum yellow turquoise light_green brown
pink PaleGreen2 MediumPurple PeachPuff1 orange3 chocolate2 olive pink light_purple light_blue plum yellow turquoise light_green brown
DarkOrange PaleGreen3 SlateBlue BlueViolet PeachPuff2 orange4 chocolate3 LightGreen pink light_purple light_blue plum yellow turquoise light_green brown)
),
};
# get default color specs for some color roles from alternate role.
# Subclasses should extend as needed.
$self->{'colors_default_role'} = {
'x_grid_lines' => 'grid_lines',
'y_grid_lines' => 'grid_lines',
'y2_grid_lines' => 'grid_lines', # should be added by Char::Composite...
};
# Define style to plot dots in Points and Lines
$self->{'brushStyle'} = 'FilledCircle';
# and return
return 1;
}
## @fn private int _copy_data($extern_ref)
# Copy external data via a reference to internal memory.
#
# Remember the external reference.\n
# Therefore, this function can anly be called once!
# @param $extern_ref Reference to external data space
sub _copy_data
{
my $self = shift;
my $extern_ref = shift;
my ( $ref, $i );
# look to see if they used the other api
if ( $self->{'dataref'} )
{
# we've already got a copy, thanks
return 1;
}
else
{
# get an array reference
$ref = [];
# loop through and copy the external data to internal memory
for $i ( 0 .. $#{$extern_ref} )
{
@{ $ref->[$i] } = @{ $extern_ref->[$i] };
## Speedup compared to:
# for $j (0..$#{$extern_ref->[$i]}) {
# $ref->[$i][$j] = $extern_ref->[$i][$j];
# }
}
# put it in the object
$self->{'dataref'} = $ref;
return 1;
}
}
## @fn private int _check_data
# Check the internal data to be displayed.
#
# Make sure the data isn't really weird
# and collect some basic info about it\n
# Not logical data is 'carp'ed.\n
# @return status of check
sub _check_data
{
my $self = shift;
my $length = 0;
# first make sure there's something there
unless ( scalar( @{ $self->{'dataref'} } ) >= 2 )
{
croak "Call me again when you have some data to chart";
}
# make sure we don't end up dividing by zero if they ask for
# just one y_tick
if ( $self->{'y_ticks'} <= 1 )
{
$self->{'y_ticks'} = 2;
carp "The number of y_ticks displayed must be at least 2";
}
# remember the number of datasets
$self->{'num_datasets'} = $#{ $self->{'dataref'} };
# remember the number of points in the largest dataset
$self->{'num_datapoints'} = 0;
for ( 0 .. $self->{'num_datasets'} )
{
if ( scalar( @{ $self->{'dataref'}[$_] } ) > $self->{'num_datapoints'} )
{
$self->{'num_datapoints'} = scalar( @{ $self->{'dataref'}[$_] } );
}
}
# find good min and max y-values for the plot
$self->_find_y_scale();
# find the longest x-tick label
$length = 0;
for ( @{ $self->{'dataref'}->[0] } )
{
next if !defined($_);
if ( length( $self->{f_x_tick}->($_) ) > $length )
{
$length = length( $self->{f_x_tick}->($_) );
}
}
if ( $length <= 0 ) { $length = 1; } # make sure $length is positive and greater 0
# now store it in the object
$self->{'x_tick_label_length'} = $length;
# find x-scale, if a x-y plot is wanted
# makes only sense for some charts
if (
$self->true( $self->{'xy_plot'} )
&& ( $self->isa('Chart::Lines')
|| $self->isa('Chart::Points')
|| $self->isa('Chart::LinesPoints')
|| $self->isa('Chart::Split')
|| $self->isa('Chart::ErrorBars') )
)
{
$self->_find_x_scale;
}
return 1;
}
## @fn private int _draw
# Plot the chart to the gd object\n
# Calls:
# @see _draw_title
# @see _draw_sub_title
# @see _sort_data
# @see _plot
#
# @return status
sub _draw
{
my $self = shift;
# leave the appropriate border on the png
$self->{'curr_x_max'} -= $self->{'png_border'};
$self->{'curr_x_min'} += $self->{'png_border'};
$self->{'curr_y_max'} -= $self->{'png_border'};
$self->{'curr_y_min'} += $self->{'png_border'};
# draw in the title
$self->_draw_title() if $self->{'title'};
# have to leave this here for backwards compatibility
$self->_draw_sub_title() if $self->{'sub_title'};
# sort the data if they want to (mainly here to make sure
# pareto charts get sorted)
$self->_sort_data() if ( $self->true( $self->{'sort'} ) );
# start drawing the data (most methods in this will be
# overridden by the derived classes)
# include _draw_legend() in this to ensure that the legend
# will be flush with the chart
$self->_plot();
# and return
return 1;
}
## @var Hash named_colors RGB values of named colors
#
# see URL http://en.wikipedia.org/wiki/Web_colors#X11_color_names
our %named_colors = (
'white' => [ 255, 255, 255 ],
'black' => [ 0, 0, 0 ],
'red' => [ 200, 0, 0 ],
'green' => [ 0, 175, 0 ],
'blue' => [ 0, 0, 200 ],
'orange' => [ 250, 125, 0 ],
'orange2' => [ 238, 154, 0 ],
'orange3' => [ 205, 133, 0 ],
'orange4' => [ 139, 90, 0 ],
'yellow' => [ 225, 225, 0 ],
'purple' => [ 200, 0, 200 ],
'light_blue' => [ 0, 125, 250 ],
'light_green' => [ 125, 250, 0 ],
'light_purple' => [ 145, 0, 250 ],
'pink' => [ 250, 0, 125 ],
'peach' => [ 250, 125, 125 ],
'olive' => [ 125, 125, 0 ],
'plum' => [ 125, 0, 125 ],
'turquoise' => [ 0, 125, 125 ],
'mauve' => [ 200, 125, 125 ],
'brown' => [ 160, 80, 0 ],
'grey' => [ 225, 225, 225 ],
'HotPink' => [ 255, 105, 180 ],
'PaleGreen1' => [ 154, 255, 154 ],
'PaleGreen2' => [ 144, 238, 144 ],
'PaleGreen3' => [ 124, 205, 124 ],
'PaleGreen4' => [ 84, 138, 84 ],
'DarkBlue' => [ 0, 0, 139 ],
'BlueViolet' => [ 138, 43, 226 ],
'PeachPuff' => [ 255, 218, 185 ],
'PeachPuff1' => [ 255, 218, 185 ],
'PeachPuff2' => [ 238, 203, 173 ],
'PeachPuff3' => [ 205, 175, 149 ],
'PeachPuff4' => [ 139, 119, 101 ],
'chocolate1' => [ 255, 127, 36 ],
'chocolate2' => [ 238, 118, 33 ],
'chocolate3' => [ 205, 102, 29 ],
'chocolate4' => [ 139, 69, 19 ],
'LightGreen' => [ 144, 238, 144 ],
'lavender' => [ 230, 230, 250 ],
'MediumPurple' => [ 147, 112, 219 ],
'DarkOrange' => [ 255, 127, 0 ],
'DarkOrange2' => [ 238, 118, 0 ],
'DarkOrange3' => [ 205, 102, 0 ],
'DarkOrange4' => [ 139, 69, 0 ],
'SlateBlue' => [ 106, 90, 205 ],
'BlueViolet' => [ 138, 43, 226 ],
'RoyalBlue' => [ 65, 105, 225 ],
);
## @fn private int _set_colors
# specify my colors
# @return status
sub _set_colors
{
my $self = shift;
my $index = $self->_color_role_to_index('background'); # allocate GD color
if ( $self->true( $self->{'transparent'} ) )
{
$self->{'gd_obj'}->transparent($index);
}
# all other roles are initialized by calling $self->_color_role_to_index(ROLENAME);
# and return
return 1;
}
## @fn private int _color_role_to_index
# return a (list of) color index(es) corresponding to the (list of) role(s)
#
# @details wantarray
# is a special keyword which returns a flag indicating
# which context your subroutine has been called in.
# It will return one of three values.
#
# @li true: If your subroutine has been called in list context
# @li false: If your subroutine has been called in scalar context
# @li undef: If your subroutine has been called in void context
#
# @return a (list of) color index(es) corresponding to the (list of) role(s) in \@_.
#
sub _color_role_to_index
{
my $self = shift;
# Return a (list of) color index(es) corresponding to the (list of) role(s) in @_.
my @result = map {
my $role = $_;
my $index = $self->{'color_table'}->{$role};
#print STDERR "Role = $_\n";
unless ( defined $index )
{
my $spec =
$self->{'colors'}->{$role}
|| $self->{'colors_default_spec'}->{$role}
|| $self->{'colors_default_spec'}->{ $self->{'colors_default_role'}->{$role} };
my @rgb = $self->_color_spec_to_rgb( $role, $spec );
#print STDERR "spec = $spec\n";
my $string = sprintf " RGB(%d,%d,%d)", map { $_ + 0 } @rgb;
$index = $self->{'color_table'}->{$string};
unless ( defined $index )
{
$index = $self->{'gd_obj'}->colorAllocate(@rgb);
$self->{'color_table'}->{$string} = $index;
}
$self->{'color_table'}->{$role} = $index;
}
$index;
} @_;
#print STDERR "Result= ".$result[0]."\n";
( wantarray && @_ > 1 ? @result : $result[0] );
}
## @fn private array _color_spec_to_rgb($role,$spec)
# Return an array (list of) rgb values for spec
# @param[in] $role name of a role
# @param[in] $spec [r,g,b] or name
# @return array of rgb values as a list (i.e., \@rgb)
#
sub _color_spec_to_rgb
{
my $self = shift;
my $role = shift; # for error messages
my $spec = shift; # [r,g,b] or name
my @rgb; # result
if ( ref($spec) eq 'ARRAY' )
{
@rgb = @{$spec};
croak "Invalid color RGB array (" . join( ',', @rgb ) . ") for $role\n"
unless @rgb == 3 && grep( !m/^\d+$/ || $_ > 255, @rgb ) == 0;
}
elsif ( !ref($spec) )
{
croak "Unknown named color ($spec) for $role\n"
unless $named_colors{$spec};
@rgb = @{ $named_colors{$spec} };
}
else
{
croak "Unrecognized color for $role\n";
}
@rgb;
}
## @fn private int _brushStyles_of_roles
# return a (list of) brushStyles corresponding to the (list of) role(s)
#
# @param \@list_of_roles List of roles
# @return (list of) brushStyle(s) corresponding to the (list of) role(s) in \@_.
#
sub _brushStyles_of_roles
{
my $self = shift;
my @roles = @_;
my @results = ();
foreach my $role (@roles)
{
my $brushStyle = $self->{'brushStyles'}->{$role};
if ( !defined($brushStyle) )
{
$brushStyle = $self->{'brushStyle'};
}
push( @results, $brushStyle );
}
@results;
}
## @fn private int _draw_title
# draw the title for the chart
#
# The title was defined by the user in set('title' => ....)\n
# The user may define some title lines by separating them via character '\\n';\n
# The used font is taken from 'title_font';\n
# The used color is calculated by function '_color_role_to_index'
# based on 'title' or 'text'\n
# @see _color_role_to_index
# @return status
sub _draw_title
{
my $self = shift;
my $font = $self->{'title_font'};
my $color;
my ( $h, $w, @lines, $x, $y );
#get the right color
if ( defined $self->{'colors'}{'title'} )
{
$color = $self->_color_role_to_index('title');
}
else
{
$color = $self->_color_role_to_index('text');
}
# make sure we're actually using a real font
unless ( ( ref $font ) eq 'GD::Font' )
{
croak "The title font you specified isn\'t a GD Font object";
}
# get the height and width of the font
( $h, $w ) = ( $font->height, $font->width );
# split the title into lines
@lines = split( /\\n/, $self->{'title'} );
# write the first line
$x = ( $self->{'curr_x_max'} - $self->{'curr_x_min'} ) / 2 + $self->{'curr_x_min'} - ( length( $lines[0] ) * $w ) / 2;
$y = $self->{'curr_y_min'} + $self->{'text_space'};
$self->{'gd_obj'}->string( $font, $x, $y, $lines[0], $color );
# now loop through the rest of them
# (the font is decreased in width and height by 1
if ( $w > 1 ) { $w--; }
if ( $h > 1 ) { $h--; }
for ( 1 .. $#lines )
{
$self->{'curr_y_min'} += $self->{'text_space'} + $h;
$x = ( $self->{'curr_x_max'} - $self->{'curr_x_min'} ) / 2 + $self->{'curr_x_min'} - ( length( $lines[$_] ) * $w ) / 2;
$y = $self->{'curr_y_min'} + $self->{'text_space'};
$self->{'gd_obj'}->string( $font, $x, $y, $lines[$_], $color );
}
# mark off that last space
$self->{'curr_y_min'} += 2 * $self->{'text_space'} + $h;
# and return
return 1;
}
## @fn private int _draw_sub_title()
# draw the sub-title for the chart
# @see _draw_title\n
# _draw_sub_title() is more or less obsolete as _draw_title() does the same
# by writing more than one line as the title.
# Both use decreased width and height of the font by one.
# @return status
sub _draw_sub_title
{
my $self = shift;
my $font = $self->{'sub_title_font'};
my $text = $self->{'sub_title'};
return 1 if length($text) == 0; # nothing to plot
#get the right color
my $color;
if ( defined $self->{'colors'}{'title'} )
{
$color = $self->_color_role_to_index('title');
}
else
{
$color = $self->_color_role_to_index('text');
}
my ( $h, $w, $x, $y );
# make sure we're using a real font
unless ( ( ref($font) ) eq 'GD::Font' )
{
croak "The subtitle font you specified isn\'t a GD Font object";
}
# get the size of the font
( $h, $w ) = ( $font->height, $font->width );
if ( $h > 1 && $w > 1 ) { $h--, $w-- }
# figure out the placement
$x = ( $self->{'curr_x_max'} - $self->{'curr_x_min'} ) / 2 + $self->{'curr_x_min'} - ( length($text) * $w ) / 2;
$y = $self->{'curr_y_min'};
# now draw the subtitle
$self->{'gd_obj'}->string( $font, $x, $y, $text, $color );
# Adapt curr_y_min
$self->{'curr_y_min'} += $self->{'text_space'} + $h;
# and return
return 1;
}
## @fn private int _sort_data()
# sort the data nicely (mostly for the pareto charts and xy-plots)
# @return status
sub _sort_data
{
my $self = shift;
my $data_ref = $self->{'dataref'};
my @data = @{ $self->{'dataref'} };
my @sort_index;
#sort the data with slices
@sort_index = sort { $data[0][$a] <=> $data[0][$b] } ( 0 .. scalar( @{ $data[1] } ) - 1 );
for ( 1 .. $#data )
{
@{ $self->{'dataref'}->[$_] } = @{ $self->{'dataref'}->[$_] }[@sort_index];
}
@{ $data_ref->[0] } = sort { $a <=> $b } @{ $data_ref->[0] };
#finally return
return 1;
}
## @fn private int _find_x_scale()
# For a xy-plot do the same for the x values, as '_find_y_scale' does for the y values!
# @see _find_y_scale
# @return status
sub _find_x_scale
{
my $self = shift;
my @data = @{ $self->{'dataref'} };
my ( $i, $j );
my ( $d_min, $d_max );
my ( $p_min, $p_max, $f_min, $f_max );
my ( $tickInterval, $tickCount, $skip );
my @tickLabels;
my $maxtickLabelLen = 0;
#look, if we have numbers
#see also if we only have integers
for $i ( 0 .. ( $self->{'num_datasets'} ) )
{
for $j ( 0 .. ( $self->{'num_datapoints'} - 1 ) )
{
# the following regular Expression matches all possible numbers, including scientific numbers
# iff data is defined
if ( defined $data[$i][$j] and $data[$i][$j] !~ m/^[\+\-]?((\.\d+)|(\d+\.?\d*))([eE][+-]?\d+)?[fFdD]?$/ )
{
croak "<$data[$i][$j]> You should give me numbers for drawing a xy plot!\n";
}
}
}
#find the dataset min and max
( $d_min, $d_max ) = $self->_find_x_range();
# Force the inclusion of zero if the user has requested it.
if ( $self->true( $self->{'include_zero'} ) )
{
if ( ( $d_min * $d_max ) > 0 ) # If both are non zero and of the same sign.
{
if ( $d_min > 0 ) # If the whole scale is positive.
{
$d_min = 0;
}
else # The scale is entirely negative.
{
$d_max = 0;
}
}
}
# Calculate the width of the dataset. (possibly modified by the user)
my $d_width = $d_max - $d_min;
# If the width of the range is zero, forcebly widen it
# (to avoid division by zero errors elsewhere in the code).
if ( 0 == $d_width )
{
$d_min--, $d_max++, $d_width = 2;
}
# Descale the range by converting the dataset width into
# a floating point exponent & mantisa pair.
my ( $rangeExponent, $rangeMantisa ) = $self->_sepFP($d_width);
my $rangeMuliplier = 10**$rangeExponent;
# Find what tick
# to use & how many ticks to plot,
# round the plot min & max to suatable round numbers.
( $tickInterval, $tickCount, $p_min, $p_max ) = $self->_calcXTickInterval(
$d_min / $rangeMuliplier,
$d_max / $rangeMuliplier,
$f_min, $f_max,
$self->{'min_x_ticks'},
$self->{'max_x_ticks'}
);
# Restore the tickInterval etc to the correct scale
$_ *= $rangeMuliplier foreach ( $tickInterval, $p_min, $p_max );
#get the precision for the labels
my $precision = $self->{'precision'};
# Now sort out an array of tick labels.
for ( my $labelNum = $p_min ; $labelNum < $p_max + $tickInterval / 2 ; $labelNum += $tickInterval )
{
my $labelText;
if ( defined $self->{f_y_tick} )
{
# Is _default_f_tick function used?
if ( $self->{f_y_tick} == \&_default_f_tick )
{
$labelText = sprintf( "%." . $precision . "f", $labelNum );
}
else
{
$labelText = $self->{f_y_tick}->($labelNum);
}
}
else
{
$labelText = sprintf( "%." . $precision . "f", $labelNum );
}
push @tickLabels, $labelText;
$maxtickLabelLen = length $labelText if $maxtickLabelLen < length $labelText;
}
# Store the calculated data.
$self->{'x_min_val'} = $p_min,
$self->{'x_max_val'} = $p_max,
$self->{'x_tick_labels'} = \@tickLabels,
$self->{'x_tick_label_length'} = $maxtickLabelLen,
$self->{'x_number_ticks'} = $tickCount;
return 1;
}
## @fn private int _find_y_scale()
# find good values for the minimum and maximum y-value on the chart
# @return status
#
# New version, re-written by David Pottage of Tao Group.\n
# This code is *AS IS* and comes with *NO WARRANTY*\n
#
# This Sub calculates correct values for the following class local variables,
# if they have not been set by the user.
#
# max_val, min_val: The maximum and minimum values for the y axis.\n
# y_ticks: The number of ticks to plot on the y scale, including
# the end points. e.g. If the scale runs from 0 to 50,
# with ticks every 10, y_ticks will have the value of 6.\n
# y_tick_labels: An array of strings, each is a label for the y axis.\n
# y_tick_labels_length: The length to allow for B tick labels. (How long is
# the longest?)
sub _find_y_scale
{
my $self = shift;
# Predeclare vars.
my ( $d_min, $d_max ); # Dataset min & max.
my ( $p_min, $p_max ); # Plot min & max.
my ( $tickInterval, $tickCount, $skip );
my @tickLabels; # List of labels for each tick.
my $maxtickLabelLen = 0; # The length of the longest tick label.
my $prec_test = 0; # Boolean which indicate if precision < |rangeExponent|
my $temp_rangeExponent;
my $flag_all_integers = 1; # assume true
# Find the dataset minimum and maximum.
( $d_min, $d_max, $flag_all_integers ) = $self->_find_y_range();
# Force the inclusion of zero if the user has requested it.
if ( $self->true( $self->{'include_zero'} ) )
{
#print "include_zero = true\n";
if ( ( $d_min * $d_max ) > 0 ) # If both are non zero and of the same sign.
{
if ( $d_min > 0 ) # If the whole scale is positive.
{
$d_min = 0;
}
else # The scale is entirely negative.
{
$d_max = 0;
}
}
}
if ( $self->true( $self->{'integer_ticks_only'} ) )
{
# Allow the dataset range to be overidden by the user.
# f_min/f_max are booleans which indicate that the min & max should not be modified.
my $f_min = 0;
if ( defined $self->{'min_val'} ) { $f_min = 1; }
$d_min = $self->{'min_val'} if $f_min;
my $f_max = 0;
if ( defined $self->{'max_val'} ) { $f_max = 1; }
$d_max = $self->{'max_val'} if $f_max;
# Assert against defined min and max.
if ( !defined $d_min || !defined $d_max )
{
croak "No min_val or max_val is defined";
}
# Assert against the min is larger than the max.
if ( $d_min > $d_max )
{
croak "The specified 'min_val' & 'max_val' values are reversed (min > max: $d_min>$d_max)";
}
# The user asked for integer ticks, force the limits to integers.
# & work out the range directly.
#$p_min = $self->_round2Tick($d_min, 1, -1);
#$p_max = $self->_round2Tick($d_max, 1, 1);
$skip = $self->{skip_int_ticks};
$skip = 1 if $skip < 1;
$p_min = $self->_round2Tick( $d_min, 1, -1 );
$p_max = $self->_round2Tick( $d_max, 1, 1 );
if ( ( $p_max - $p_min ) == 0 )
{
$p_max++ if ( $f_max != 1 ); # p_max is not defined by the user
$p_min-- if ( $f_min != 1 ); # p_min is not defined by the user
$p_max++ if ( ( $p_max - $p_min ) == 0 );
}
$tickInterval = $skip;
$tickCount = ( $p_max - $p_min ) / $skip + 1;
# Now sort out an array of tick labels.
for ( my $labelNum = $p_min ; $labelNum < $p_max + $tickInterval / 3 ; $labelNum += $tickInterval )
{
my $labelText;
if ( defined $self->{f_y_tick} )
{
# Is _default_f_tick function used?
if ( $self->{f_y_tick} == \&_default_f_tick )
{
$labelText = sprintf( "%d", $labelNum );
}
else
{
$labelText = $self->{f_y_tick}->($labelNum);
}
}
else
{
$labelText = sprintf( "%d", $labelNum );
}
push @tickLabels, $labelText;
$maxtickLabelLen = length $labelText if $maxtickLabelLen < length $labelText;
}
}
else
{
# Allow the dataset range to be overidden by the user.
# f_min/f_max are booleans which indicate that the min & max should not be modified.
my $f_min = 0;
if ( defined $self->{'min_val'} ) { $f_min = 1; }
$d_min = $self->{'min_val'} if $f_min;
my $f_max = 0;
if ( defined $self->{'max_val'} ) { $f_max = 1; }
$d_max = $self->{'max_val'} if $f_max;
# print "fmin $f_min fmax $f_max\n";
# print "dmin $d_min dmax $d_max\n";
# Assert against defined min and max.
if ( !defined $d_min || !defined $d_max )
{
croak "No min_val or max_val is defined";
}
# Assert against the min is larger than the max.
if ( $d_min > $d_max )
{
croak "The the specified 'min_val' & 'max_val' values are reversed (min > max: $d_min>$d_max)";
}
# Calculate the width of the dataset. (possibly modified by the user)
my $d_width = $d_max - $d_min;
# If the width of the range is zero, forcibly widen it
# (to avoid division by zero errors elsewhere in the code).
if ( $d_width == 0 )
{
$d_min--, $d_max++, $d_width = 2;
}
# Descale the range by converting the dataset width into
# a floating point exponent & mantisa pair.
my ( $rangeExponent, $rangeMantisa ) = $self->_sepFP($d_width);
my $rangeMuliplier = 10**$rangeExponent;
# print "fmin $f_min fmax $f_max\n";
# print "dmin $d_min dmax $d_max\n";
# Find what tick
# to use & how many ticks to plot,
# round the plot min & max to suitable round numbers.
( $tickInterval, $tickCount, $p_min, $p_max ) = $self->_calcTickInterval(
$d_min / $rangeMuliplier,
$d_max / $rangeMuliplier,
$f_min, $f_max,
$self->{'min_y_ticks'},
$self->{'max_y_ticks'}
);
# Restore the tickInterval etc to the correct scale
$_ *= $rangeMuliplier foreach ( $tickInterval, $p_min, $p_max );
# Is precision < |rangeExponent|?
if ( $rangeExponent < 0 )
{
$temp_rangeExponent = -$rangeExponent;
}
else
{
$temp_rangeExponent = $rangeExponent;
}
# print "pmin $p_min pmax $p_max\n";
# print "range exponent $rangeExponent\n";
#get the precision for the labels
my $precision = $self->{'precision'};
if ( $temp_rangeExponent != 0
&& $rangeExponent < 0
&& $temp_rangeExponent > $precision )
{
$prec_test = 1;
}
# Now sort out an array of tick labels.
for ( my $labelNum = $p_min ; $labelNum < $p_max + $tickInterval / 2 ; $labelNum += $tickInterval )
{
my $labelText;
if ( defined $self->{f_y_tick} )
{
# Is _default_f_tick function used?
if ( ( $self->{f_y_tick} == \&_default_f_tick ) && ( $prec_test == 0 ) )
{
$labelText = sprintf( "%." . $precision . "f", $labelNum );
}
# If precision <|rangeExponent| print the labels whith exponents
elsif ( ( $self->{f_y_tick} == \&_default_f_tick ) && ( $prec_test == 1 ) )
{
$labelText = $self->{f_y_tick}->($labelNum);
# print "precision $precision\n";
# print "temp range exponent $temp_rangeExponent\n";
# print "range exponent $rangeExponent\n";
# print "labelText $labelText\n";
}
else
{
$labelText = $self->{f_y_tick}->($labelNum);
}
}
else
{
$labelText = sprintf( "%." . $precision . "f", $labelNum );
}
push @tickLabels, $labelText;
$maxtickLabelLen = length $labelText if $maxtickLabelLen < length $labelText;
} # end for
}
# Store the calculated data.
#### begin debugging output
#if ( defined $self->{'y_ticks'} )
#{
# print "_find_y_scale: self->{'y_ticks'}=".$self->{'y_ticks'}."\n";
#}
#else
#{
# print "_find_y_scale: self->{'y_ticks'}= NOT DEFINED\n";
#}
#if ( defined $self->{'min_val'} )
#{
# print "_find_y_scale: self->{'min_val'}=".$self->{'min_val'}."\n";
#}
#else
#{
# print "_find_y_scale: self->{'min_val'}=NOT DEFINED\n";
#}
#if ( defined $self->{'max_val'} )
#{
# print "_find_y_scale: self->{'max_val'}=".$self->{'max_val'}."\n";
#}
#else
#{
# print "_find_y_scale: self->{'max_val'}= NOT DEFINED\n";
#}
#### end debugging output
$self->{'min_val'} = $p_min,
$self->{'max_val'} = $p_max,
$self->{'y_ticks'} = $tickCount,
$self->{'y_tick_labels'} = \@tickLabels,
$self->{'y_tick_label_length'} = $maxtickLabelLen;
##################
#print statement is for debug only
#print "_find_y_scale: min_val = $p_min, max_val=$p_max\n";
##################
# and return.
return 1;
}
## @fn private _calcTickInterval($dataset_min, $dataset_max, $flag_fixed_min, $flag_fixed_max, $minTicks, $maxTicks)
# @brief
# Calculate the Interval between ticks in y direction
#
# @details
# Calculate the Interval between ticks in y direction
# and compare the number of ticks to
# the user's given values min_y_ticks, max_y_ticks.
#
# @param[in] $dataset_min Minimal value in y direction
# @param[in] $dataset_max Maximal value in y direction
# @param[in] $flag_fixed_min Indicator whether the dataset_min value is fixed
# @param[in] $flag_fixed_max Indicator whether the dataset_max value is fixed
# @param[in] $minTicks Minimal number of ticks wanted
# @param[in] $maxTicks Maximal number of ticks wanted
# @return Array of ($tickInterval, $tickCount, $pMin, $pMax)
#
sub _calcTickInterval
{
my $self = shift;
my (
$dataset_min, $dataset_max, # The dataset min & max.
$flag_fixed_min, $flag_fixed_max, # Indicates if those min/max are fixed.
$minTicks, $maxTicks, # The minimum & maximum number of ticks.
) = @_;
# print "calcTickInterval dataset_min $dataset_min dataset_max $dataset_max flag_fixed_min $flag_fixed_min flag_mixed_max $flag_fixed_max\n";
# Verify the supplied 'min_y_ticks' & 'max_y_ticks' are sensible.
if ( $minTicks < 2 )
{
#print STDERR "Chart::Base::_calcTickInterval : Incorrect value for 'min_y_ticks', too small (less than 2).\n";
$minTicks = 2;
}
if ( $maxTicks < 5 * $minTicks )
{
#print STDERR "Chart::Base::_calcTickInterval : Incorrect value for 'max_y_ticks', too small (<5*minTicks).\n";
$maxTicks = 5 * $minTicks;
}
my $width = $dataset_max - $dataset_min;
my @divisorList;
for ( my $baseMul = 1 ; ; $baseMul *= 10 )
{
TRY: foreach my $tryMul ( 1, 2, 5 )
{
# Calc a fresh, smaller tick interval.
my $divisor = $baseMul * $tryMul;
# Count the number of ticks.
my ( $tickCount, $pMin, $pMax ) = $self->_countTicks( $dataset_min, $dataset_max, 1 / $divisor );
# Look a the number of ticks.
if ( $maxTicks < $tickCount )
{
# If it is to high, Backtrack.
$divisor = pop @divisorList;
# just for security:
if ( !defined($divisor) || $divisor == 0 ) { $divisor = 1; }
( $tickCount, $pMin, $pMax ) = $self->_countTicks( $dataset_min, $dataset_max, 1 / $divisor );
#print STDERR "\nChart::Base : Caution: Tick limit of $maxTicks exceeded. Backing of to an interval of ".1/$divisor." which plots $tickCount ticks\n";
return ( 1 / $divisor, $tickCount, $pMin, $pMax );
}
elsif ( $minTicks > $tickCount )
{
# If it is too low, try again.
next TRY;
}
else
{
# Store the divisor for possible later backtracking.
push @divisorList, $divisor;
# if the min or max is fixed, check they will fit in the interval.
next TRY if ( $flag_fixed_min && ( int( $dataset_min * $divisor ) != ( $dataset_min * $divisor ) ) );
next TRY if ( $flag_fixed_max && ( int( $dataset_max * $divisor ) != ( $dataset_max * $divisor ) ) );
# If everything passes the tests, return.
return ( 1 / $divisor, $tickCount, $pMin, $pMax );
}
}
}
die "can't happen!";
}
## @fn private int _calcXTickInterval($min,$max,$minF,$maxF,$minTicks,$maxTicks)
# @brief
# Calculate the Interval between ticks in x direction
#
# @details
# Calculate the Interval between ticks in x direction
# and compare the number of ticks to
# the user's given values minTicks, maxTicks.
#
# @param[in] $min Minimal value of dataset in x direction
# @param[in] $max Maximal value of dataset in x direction
# @param[in] $minF Inddicator if those min value is fixed
# @param[in] $maxF Inddicator if those max value is fixed
# @param[in] $minTicks Minimal number of tick in x direction
# @param[in] $maxTicks Maximal number of tick in x direction
# @return $tickInterval, $tickCount, $pMin, $pMax
sub _calcXTickInterval
{
my $self = shift;
my (
$min, $max, # The dataset min & max.
$minF, $maxF, # Indicates if those min/max are fixed.
$minTicks, $maxTicks, # The minimum & maximum number of ticks.
) = @_;
# Verify the supplied 'min_y_ticks' & 'max_y_ticks' are sensible.
if ( $minTicks < 2 )
{
#print STDERR "Chart::Base::_calcXTickInterval : Incorrect value for 'min_y_ticks', too small.\n";
$minTicks = 2;
}
if ( $maxTicks < 5 * $minTicks )
{
#print STDERR "Chart::Base::_calcXTickInterval : Incorrect value for 'max_y_ticks', to small.\n";
$maxTicks = 5 * $minTicks;
}
my $width = $max - $min;
my @divisorList;
for ( my $baseMul = 1 ; ; $baseMul *= 10 )
{
TRY: foreach my $tryMul ( 1, 2, 5 )
{
# Calc a fresh, smaller tick interval.
my $divisor = $baseMul * $tryMul;
# Count the number of ticks.
my ( $tickCount, $pMin, $pMax ) = $self->_countTicks( $min, $max, 1 / $divisor );
#print STDERR "Chart::Base::_calcXTickInterval : tickCount = $tickCount, maxTicks = $maxTicks\n";
# Look a the number of ticks.
if ( $maxTicks < $tickCount )
{
# If it is to high, Backtrack.
$divisor = pop @divisorList;
# just for security:
if ( !defined($divisor) || $divisor == 0 ) { $divisor = 1; }
( $tickCount, $pMin, $pMax ) = $self->_countTicks( $min, $max, 1 / $divisor );
#print STDERR "\nChart::Base : Caution: Tick limit of $maxTicks exceeded. Backing of to an interval of ".1/$divisor." which plots $tickCount ticks\n";
return ( 1 / $divisor, $tickCount, $pMin, $pMax );
}
elsif ( $minTicks > $tickCount )
{
# If it is too low, try again.
next TRY;
}
else
{
# Store the divisor for possible later backtracking.
push @divisorList, $divisor;
# if the min or max is fixed, check they will fit in the interval.
next TRY if ( $minF && ( int( $min * $divisor ) != ( $min * $divisor ) ) );
next TRY if ( $maxF && ( int( $max * $divisor ) != ( $max * $divisor ) ) );
# If everything passes the tests, return.
return ( 1 / $divisor, $tickCount, $pMin, $pMax );
}
}
}
croak "can't happen!";
}
## @fn private int _countTicks($min,$max,$interval)
#
# @brief
# Works out how many ticks would be displayed at that interval
#
# @param $min Minimal value
# @param $max Maximal value
# @param $interval value
# @return ($tickCount, $minR, $maxR)
#
# @details
#
# e.g min=2, max=5, interval=1, result is 4 ticks.\n
# written by David Pottage of Tao Group.\n
# $minR = $self->_round2Tick( $min, $interval, -1);\n
# $maxR = $self->_round2Tick( $max, $interval, 1);\n
# $tickCount = ( $maxR/$interval ) - ( $minR/$interval ) +1;
sub _countTicks
{
my $self = shift;
my ( $min, $max, $interval ) = @_;
my $minR = $self->_round2Tick( $min, $interval, -1 );
my $maxR = $self->_round2Tick( $max, $interval, 1 );
my $tickCount = ( $maxR / $interval ) - ( $minR / $interval ) + 1;
return ( $tickCount, $minR, $maxR );
}
## @fn private int _round2Tick($input, $interval, $roundUP)
# Rounds up or down to the next tick of interval size.
#
# $roundUP can be +1 or -1 to indicate if rounding should be up or down.\n
# written by David Pottage of Tao Group.
#
# @param $input
# @param $interval
# @param $roundUP
# @return retN*interval
sub _round2Tick
{
my $self = shift;
my ( $input, $interval, $roundUP ) = @_;
return $input if $interval == 0;
die unless 1 == $roundUP * $roundUP;
my $intN = int( $input / $interval );
my $fracN = ( $input / $interval ) - $intN;
my $retN =
( ( 0 == $fracN ) || ( ( $roundUP * $fracN ) < 0 ) )
? $intN
: $intN + $roundUP;
return $retN * $interval;
}
## @fn private array _sepFP($num)
# @brief
# Seperates a number into it's base 10 floating point exponent & mantisa.
# @details
# written by David Pottage of Tao Group.
#
# @param $num Floating point number
# @return ( exponent, mantissa)
sub _sepFP
{
my $self = shift;
my ($num) = @_;
return ( 0, 0 ) if $num == 0;
my $sign = ( $num > 0 ) ? 1 : -1;
$num *= $sign;
my $exponent = int( log($num) / log(10) );
my $mantisa = $sign * ( $num / ( 10**$exponent ) );
return ( $exponent, $mantisa );
}
## @fn private array _find_y_range()
# Find minimum and maximum value of y data sets.
#
# @return ( min, max, flag_all_integers )
sub _find_y_range
{
my $self = shift;
my $data = $self->{'dataref'};
my $max = undef;
my $min = undef;
my $flag_all_integers = 1; # assume true
for my $dataset ( @$data[ 1 .. $#$data ] )
{
for my $datum (@$dataset)
{
if ( defined $datum )
{
#croak "Missing data (dataset)";
if ($flag_all_integers)
{
# it's worth looking for integers
if ( $datum !~ /^[\-\+]?\d+$/ )
{
$flag_all_integers = 0; # No
}
}
if ( $datum =~ /^[\-\+]?\s*[\d\.eE\-\+]+/ )
{
if ( defined $max && $max =~ /^[\-\+]{0,}\s*[\d\.eE\-\+]+/ )
{
if ( $datum > $max ) { $max = $datum; }
elsif ( !defined $min ) { $min = $datum; }
elsif ( $datum < $min ) { $min = $datum; }
}
else { $min = $max = $datum }
}
}
}
}
# Return:
( $min, $max, $flag_all_integers );
}
## @fn private array _find_x_range()
# Find minimum and maximum value of x data sets
# @return ( min, max )
sub _find_x_range
{
my $self = shift;
my $data = $self->{'dataref'};
my $max = undef;
my $min = undef;
for my $datum ( @{ $data->[0] } )
{
if ( defined $datum && $datum =~ /^[\-\+]{0,1}\s*[\d\.eE\-\+]+/ )
{
if ( defined $max && $max =~ /^[\-\+]{0,1}\s*[\d\.eE\-\+]+/ )
{
if ( $datum > $max ) { $max = $datum }
elsif ( $datum < $min ) { $min = $datum }
}
else { $min = $max = $datum }
}
}
return ( $min, $max );
}
## @fn private int _plot()
# main sub that controls all the plotting of the actual chart
# @return status
sub _plot
{
my $self = shift;
# draw the legend first
$self->_draw_legend();
# mark off the graph_border space
$self->{'curr_x_min'} += $self->{'graph_border'};
$self->{'curr_x_max'} -= $self->{'graph_border'};
$self->{'curr_y_min'} += $self->{'graph_border'};
$self->{'curr_y_max'} -= $self->{'graph_border'};
# draw the x- and y-axis labels
$self->_draw_x_label if $self->{'x_label'};
$self->_draw_y_label('left') if $self->{'y_label'};
$self->_draw_y_label('right') if $self->{'y_label2'};
# draw the ticks and tick labels
$self->_draw_ticks();
# give the plot a grey background if they want it
$self->_grey_background if ( $self->true( $self->{'grey_background'} ) );
#draw the ticks again if grey_background has ruined it in a Direction Chart.
if ( $self->true( $self->{'grey_background'} ) && $self->isa("Chart::Direction") )
{
$self->_draw_ticks;
}
$self->_draw_grid_lines if ( $self->true( $self->{'grid_lines'} ) );
$self->_draw_x_grid_lines if ( $self->true( $self->{'x_grid_lines'} ) );
$self->_draw_y_grid_lines if ( $self->true( $self->{'y_grid_lines'} ) );
$self->_draw_y2_grid_lines if ( $self->true( $self->{'y2_grid_lines'} ) );
# plot the data
$self->_draw_data();
# and return
return 1;
}
## @fn private int _draw_legend()
# let the user know what all the pretty colors mean.\n
# The user define the position of the legend by setting option
# 'legend' to 'top', 'bottom', 'left', 'right' or 'none'.
# The legend is positioned at the defined place, respectively.
# @return status
sub _draw_legend
{
my $self = shift;
my $length;
# check to see if legend type is none..
if ( $self->{'legend'} =~ /^none$/ || length( $self->{'legend'} ) == 0 )
{
return 1;
}
# check to see if they have as many labels as datasets,
# warn them if not
if ( ( $#{ $self->{'legend_labels'} } >= 0 )
&& ( ( scalar( @{ $self->{'legend_labels'} } ) ) != $self->{'num_datasets'} ) )
{
carp "The number of legend labels and datasets doesn\'t match";
}
# init a field to store the length of the longest legend label
unless ( $self->{'max_legend_label'} )
{
$self->{'max_legend_label'} = 0;
}
# fill in the legend labels, find the longest one
for ( 1 .. $self->{'num_datasets'} )
{
unless ( $self->{'legend_labels'}[ $_ - 1 ] )
{
$self->{'legend_labels'}[ $_ - 1 ] = "Dataset $_";
}
$length = length( $self->{'legend_labels'}[ $_ - 1 ] );
if ( $length > $self->{'max_legend_label'} )
{
$self->{'max_legend_label'} = $length;
}
}
# different legend types
if ( $self->{'legend'} eq 'bottom' )
{
$self->_draw_bottom_legend;
}
elsif ( $self->{'legend'} eq 'right' )
{
$self->_draw_right_legend;
}
elsif ( $self->{'legend'} eq 'left' )
{
$self->_draw_left_legend;
}
elsif ( $self->{'legend'} eq 'top' )
{
$self->_draw_top_legend;
}
elsif ( $self->{'legend'} eq 'none' || length( $self->{'legend'} ) == 0 )
{
$self->_draw_none_legend;
}
else
{
carp "I can't put a legend there (at " . $self->{'legend'} . ")\n";
}
# and return
return 1;
}
## @fn private int _draw_bottom_legend()
# put the legend on the bottom of the chart
# @return status
sub _draw_bottom_legend
{
my $self = shift;
my @labels = @{ $self->{'legend_labels'} };
my ( $x1, $y1, $x2, $x3, $y2 );
my ( $empty_width, $max_label_width, $cols, $rows, $color, $brush );
my ( $col_width, $row_height, $r, $c, $index, $x, $y, $w, $h, $axes_space );
my $font = $self->{'legend_font'};
# make sure we're using a real font
unless ( ( ref($font) ) eq 'GD::Font' )
{
croak "The font you specified isn\'t a GD Font object";
}
# get the size of the font
( $h, $w ) = ( $font->height, $font->width );
# find the base x values
$axes_space =
( $self->{'y_tick_label_length'} * $self->{'tick_label_font'}->width ) +
$self->{'tick_len'} +
( 3 * $self->{'text_space'} );
$x1 = $self->{'curr_x_min'} + $self->{'graph_border'};
$x2 = $self->{'curr_x_max'} - $self->{'graph_border'};
if ( $self->{'y_axes'} =~ /^right$/i )
{
$x2 -= $axes_space;
}
elsif ( $self->{'y_axes'} =~ /^both$/i )
{
$x2 -= $axes_space;
$x1 += $axes_space;
}
if ( $self->{'y_label'} )
{
$x1 += $self->{'label_font'}->height + 2 * $self->{'text_space'};
}
if ( $self->{'y_label2'} )
{
$x2 -= $self->{'label_font'}->height + 2 * $self->{'text_space'};
}
# figure out how wide the columns need to be, and how many we
# can fit in the space available
$empty_width = ( $x2 - $x1 ) - ( 2 * $self->{'legend_space'} );
$max_label_width = $self->{'max_legend_label'} * $w + ( 4 * $self->{'text_space'} ) + $self->{'legend_example_size'};
$cols = int( $empty_width / $max_label_width );
unless ($cols)
{
$cols = 1;
}
$col_width = $empty_width / $cols;
# figure out how many rows we need, remember how tall they are
$rows = int( $self->{'num_datasets'} / $cols );
unless ( ( $self->{'num_datasets'} % $cols ) == 0 )
{
$rows++;
}
unless ($rows)
{
$rows = 1;
}
$row_height = $h + $self->{'text_space'};
# box the legend off
$y1 = $self->{'curr_y_max'} - $self->{'text_space'} - ( $rows * $row_height ) - ( 2 * $self->{'legend_space'} );
$y2 = $self->{'curr_y_max'};
$self->{'gd_obj'}->rectangle( $x1, $y1, $x2, $y2, $self->_color_role_to_index('misc') );
$x1 += $self->{'legend_space'} + $self->{'text_space'};
$x2 -= $self->{'legend_space'};
$y1 += $self->{'legend_space'} + $self->{'text_space'};
$y2 -= $self->{'legend_space'} + $self->{'text_space'};
# draw in the actual legend
for $r ( 0 .. $rows - 1 )
{
for $c ( 0 .. $cols - 1 )
{
$index = ( $r * $cols ) + $c; # find the index in the label array
if ( $labels[$index] )
{
# get the color
$color = $self->_color_role_to_index( 'dataset' . $index );
# get the x-y coordinate for the start of the example line
$x = $x1 + ( $col_width * $c );
$y = $y1 + ( $row_height * $r ) + $h / 2;
# now draw the example line
$self->{'gd_obj'}->line( $x, $y, $x + $self->{'legend_example_size'}, $y, $color );
# reset the brush for points
$brush = $self->_prepare_brush( $color, 'point', 'dataset' . $index );
$self->{'gd_obj'}->setBrush($brush);
# draw the point
$x3 = int( $x + $self->{'legend_example_size'} / 2 );
$self->{'gd_obj'}->line( $x3, $y, $x3, $y, gdBrushed );
# adjust the x-y coordinates for the start of the label
$x += $self->{'legend_example_size'} + ( 2 * $self->{'text_space'} );
$y = $y1 + ( $row_height * $r );
# now draw the label
$self->{'gd_obj'}->string( $font, $x, $y, $labels[$index], $color );
}
}
}
# mark off the space used
$self->{'curr_y_max'} -= ( $rows * $row_height ) + $self->{'text_space'} + ( 2 * $self->{'legend_space'} );
# now return
return 1;
}
## @fn private int _draw_right_legend()
# put the legend on the right of the chart
# @return status
sub _draw_right_legend
{
my $self = shift;
my @labels = @{ $self->{'legend_labels'} };
my ( $x1, $x2, $x3, $y1, $y2, $width, $color, $misccolor, $w, $h, $brush );
my $font = $self->{'legend_font'};
# make sure we're using a real font
unless ( ( ref($font) ) eq 'GD::Font' )
{
croak "The subtitle font you specified isn\'t a GD Font object";
}
# get the size of the font
( $h, $w ) = ( $font->height, $font->width );
# get the miscellaneous color
$misccolor = $self->_color_role_to_index('misc');
# find out how wide the largest label is
$width =
( 2 * $self->{'text_space'} ) +
( $self->{'max_legend_label'} * $w ) +
$self->{'legend_example_size'} +
( 2 * $self->{'legend_space'} );
# get some starting x-y values
$x1 = $self->{'curr_x_max'} - $width;
$x2 = $self->{'curr_x_max'};
$y1 = $self->{'curr_y_min'} + $self->{'graph_border'};
$y2 =
$self->{'curr_y_min'} +
$self->{'graph_border'} +
$self->{'text_space'} +
( $self->{'num_datasets'} * ( $h + $self->{'text_space'} ) ) +
( 2 * $self->{'legend_space'} );
# box the legend off
$self->{'gd_obj'}->rectangle( $x1, $y1, $x2, $y2, $misccolor );
# leave that nice space inside the legend box
$x1 += $self->{'legend_space'};
$y1 += $self->{'legend_space'} + $self->{'text_space'};
# now draw the actual legend
for ( 0 .. $#labels )
{
# get the color
my $c = $self->{'num_datasets'} - $_ - 1;
# color of the datasets in the legend
$color = $self->_color_role_to_index( 'dataset' . $_ );
# find the x-y coords
$x2 = $x1;
$x3 = $x2 + $self->{'legend_example_size'};
$y2 = $y1 + ( $_ * ( $self->{'text_space'} + $h ) ) + $h / 2;
# do the line first
$self->{'gd_obj'}->line( $x2, $y2, $x3, $y2, $color );
# reset the brush for points
my $offset = 0;
( $brush, $offset ) = $self->_prepare_brush( $color, 'point', 'dataset' . $_ );
$self->{'gd_obj'}->setBrush($brush);
# draw the point
$self->{'gd_obj'}->line( int( ( $x3 + $x2 ) / 2 ), $y2, int( ( $x3 + $x2 ) / 2 ), $y2, gdBrushed );
# now the label
$x2 = $x3 + ( 2 * $self->{'text_space'} );
$y2 -= $h / 2;
# order of the datasets in the legend
$self->{'gd_obj'}->string( $font, $x2, $y2, $labels[$_], $color );
}
# mark off the used space
$self->{'curr_x_max'} -= $width;
# and return
return 1;
}
## @fn private int _draw_top_legend()
# put the legend on top of the chart
# @return status
sub _draw_top_legend
{
my $self = shift;
my @labels = @{ $self->{'legend_labels'} };
my ( $x1, $y1, $x2, $x3, $y2, $empty_width, $max_label_width );
my ( $cols, $rows, $color, $brush );
my ( $col_width, $row_height, $r, $c, $index, $x, $y, $w, $h, $axes_space );
my $font = $self->{'legend_font'};
# make sure we're using a real font
unless ( ( ref($font) ) eq 'GD::Font' )
{
croak "The subtitle font you specified isn\'t a GD Font object";
}
# get the size of the font
( $h, $w ) = ( $font->height, $font->width );
# find the base x values
$axes_space =
( $self->{'y_tick_label_length'} * $self->{'tick_label_font'}->width ) +
$self->{'tick_len'} +
( 3 * $self->{'text_space'} );
$x1 = $self->{'curr_x_min'} + $self->{'graph_border'};
$x2 = $self->{'curr_x_max'} - $self->{'graph_border'};
if ( $self->{'y_axes'} =~ /^right$/i )
{
$x2 -= $axes_space;
}
elsif ( $self->{'y_axes'} =~ /^both$/i )
{
$x2 -= $axes_space;
$x1 += $axes_space;
}
# figure out how wide the columns can be, and how many will fit
$empty_width = ( $x2 - $x1 ) - ( 2 * $self->{'legend_space'} );
$max_label_width = ( 4 * $self->{'text_space'} ) + ( $self->{'max_legend_label'} * $w ) + $self->{'legend_example_size'};
$cols = int( $empty_width / $max_label_width );
unless ($cols)
{
$cols = 1;
}
$col_width = $empty_width / $cols;
# figure out how many rows we need and remember how tall they are
$rows = int( $self->{'num_datasets'} / $cols );
unless ( ( $self->{'num_datasets'} % $cols ) == 0 )
{
$rows++;
}
unless ($rows)
{
$rows = 1;
}
$row_height = $h + $self->{'text_space'};
# box the legend off
$y1 = $self->{'curr_y_min'};
$y2 = $self->{'curr_y_min'} + $self->{'text_space'} + ( $rows * $row_height ) + ( 2 * $self->{'legend_space'} );
$self->{'gd_obj'}->rectangle( $x1, $y1, $x2, $y2, $self->_color_role_to_index('misc') );
# leave some space inside the legend
$x1 += $self->{'legend_space'} + $self->{'text_space'};
$x2 -= $self->{'legend_space'};
$y1 += $self->{'legend_space'} + $self->{'text_space'};
$y2 -= $self->{'legend_space'} + $self->{'text_space'};
# draw in the actual legend
for $r ( 0 .. $rows - 1 )
{
for $c ( 0 .. $cols - 1 )
{
$index = ( $r * $cols ) + $c; # find the index in the label array
if ( $labels[$index] )
{
# get the color
$color = $self->_color_role_to_index( 'dataset' . $index );
# find the x-y coords
$x = $x1 + ( $col_width * $c );
$y = $y1 + ( $row_height * $r ) + $h / 2;
# draw the line first
$self->{'gd_obj'}->line( $x, $y, $x + $self->{'legend_example_size'}, $y, $color );
# reset the brush for points
$brush = $self->_prepare_brush( $color, 'point', 'dataset' . $index );
$self->{'gd_obj'}->setBrush($brush);
# draw the point
$x3 = int( $x + $self->{'legend_example_size'} / 2 );
$self->{'gd_obj'}->line( $x3, $y, $x3, $y, gdBrushed );
# now the label
$x += $self->{'legend_example_size'} + ( 2 * $self->{'text_space'} );
$y -= $h / 2;
$self->{'gd_obj'}->string( $font, $x, $y, $labels[$index], $color );
}
}
}
# mark off the space used
$self->{'curr_y_min'} += ( $rows * $row_height ) + $self->{'text_space'} + 2 * $self->{'legend_space'};
# now return
return 1;
}
## @fn private int _draw_left_legend()
# put the legend on the left of the chart
# @return status
sub _draw_left_legend
{
my $self = shift;
my @labels = @{ $self->{'legend_labels'} };
my ( $x1, $x2, $x3, $y1, $y2, $width, $color, $misccolor, $w, $h, $brush );
my $font = $self->{'legend_font'};
# make sure we're using a real font
unless ( ( ref($font) ) eq 'GD::Font' )
{
croak "The subtitle font you specified isn\'t a GD Font object";
}
# get the size of the font
( $h, $w ) = ( $font->height, $font->width );
# get the miscellaneous color
$misccolor = $self->_color_role_to_index('misc');
# find out how wide the largest label is
$width =
( 2 * $self->{'text_space'} ) +
( $self->{'max_legend_label'} * $w ) +
$self->{'legend_example_size'} +
( 2 * $self->{'legend_space'} );
# get some base x-y coordinates
$x1 = $self->{'curr_x_min'};
$x2 = $self->{'curr_x_min'} + $width;
$y1 = $self->{'curr_y_min'} + $self->{'graph_border'};
$y2 =
$self->{'curr_y_min'} +
$self->{'graph_border'} +
$self->{'text_space'} +
( $self->{'num_datasets'} * ( $h + $self->{'text_space'} ) ) +
( 2 * $self->{'legend_space'} );
# box the legend off
$self->{'gd_obj'}->rectangle( $x1, $y1, $x2, $y2, $misccolor );
# leave that nice space inside the legend box
$x1 += $self->{'legend_space'};
$y1 += $self->{'legend_space'} + $self->{'text_space'};
# now draw the actual legend
for ( 0 .. $#labels )
{
# get the color
my $c = $self->{'num_datasets'} - $_ - 1;
# color of the datasets in the legend
$color = $self->_color_role_to_index( 'dataset' . $_ );
# find the x-y coords
$x2 = $x1;
$x3 = $x2 + $self->{'legend_example_size'};
$y2 = $y1 + ( $_ * ( $self->{'text_space'} + $h ) ) + $h / 2;
# do the line first
$self->{'gd_obj'}->line( $x2, $y2, $x3, $y2, $color );
# reset the brush for points
$brush = $self->_prepare_brush( $color, 'point', 'dataset' . $_ );
$self->{'gd_obj'}->setBrush($brush);
# draw the point
$self->{'gd_obj'}->line( int( ( $x3 + $x2 ) / 2 ), $y2, int( ( $x3 + $x2 ) / 2 ), $y2, gdBrushed );
# now the label
$x2 = $x3 + ( 2 * $self->{'text_space'} );
$y2 -= $h / 2;
# order of the datasets in the legend
$self->{'gd_obj'}->string( $font, $x2, $y2, $labels[$_], $color );
}
# mark off the used space
$self->{'curr_x_min'} += $width;
# and return
return 1;
}
## @fn private int _draw_none_legend()
# no legend to draw..
# Just return in this case. This routine may be overwritten by
# subclasses.
# @return 1
sub _draw_none_legend
{
my $self = shift;
my $status = 1;
return $status;
}
## @fn private int _draw_x_label()
# draw the label for the x-axis
#
# Get font for labels\n
# Get the color of x_label or text\n
# Get size of font\n
# and write x-Label
#
# @return status
sub _draw_x_label
{
my $self = shift;
my $label = $self->{'x_label'};
my $font = $self->{'label_font'};
my $color;
my ( $h, $w, $x, $y );
#get the right color
if ( defined $self->{'colors'}->{'x_label'} )
{
$color = $self->_color_role_to_index('x_label');
}
else
{
$color = $self->_color_role_to_index('text');
}
# make sure it's a real GD Font object
unless ( ( ref($font) ) eq 'GD::Font' )
{
croak "The x-axis label font you specified isn\'t a GD Font object";
}
# get the size of the font
( $h, $w ) = ( $font->height, $font->width );
# make sure it goes in the right place
$x = ( $self->{'curr_x_max'} - $self->{'curr_x_min'} ) / 2 + $self->{'curr_x_min'} - ( length($label) * $w ) / 2;
$y = $self->{'curr_y_max'} - ( $self->{'text_space'} + $h );
# now write it
$self->{'gd_obj'}->string( $font, $x, $y, $label, $color );
# mark the space written to as used
$self->{'curr_y_max'} -= $h + 2 * $self->{'text_space'};
# and return
return 1;
}
## @fn private int _draw_y_label()
# draw the label for the y-axis
# @return status
sub _draw_y_label
{
my $self = shift;
my $side = shift;
my $font = $self->{'label_font'};
my ( $label, $h, $w, $x, $y, $color );
# get the label
if ( $side eq 'left' )
{
$label = $self->{'y_label'};
$color = $self->_color_role_to_index('y_label');
}
elsif ( $side eq 'right' )
{
$label = $self->{'y_label2'};
$color = $self->_color_role_to_index('y_label2');
}
# make sure it's a real GD Font object
unless ( ( ref($font) ) eq 'GD::Font' )
{
croak "The x-axis label font you specified isn\'t a GD Font object";
}
# get the size of the font
( $h, $w ) = ( $font->height, $font->width );
# make sure it goes in the right place
if ( $side eq 'left' )
{
$x = $self->{'curr_x_min'} + $self->{'text_space'};
}
elsif ( $side eq 'right' )
{
$x = $self->{'curr_x_max'} - $self->{'text_space'} - $h;
}
$y = ( $self->{'curr_y_max'} - $self->{'curr_y_min'} ) / 2 + $self->{'curr_y_min'} + ( length($label) * $w ) / 2;
# write it
$self->{'gd_obj'}->stringUp( $font, $x, $y, $label, $color );
# mark the space written to as used
if ( $side eq 'left' )
{
$self->{'curr_x_min'} += $h + 2 * $self->{'text_space'};
}
elsif ( $side eq 'right' )
{
$self->{'curr_x_max'} -= $h + 2 * $self->{'text_space'};
}
# now return
return 1;
}
## @fn private int _draw_ticks()
# draw the ticks and tick labels
# @return status
sub _draw_ticks
{
my $self = shift;
#if the user wants an xy_plot, calculate the x-ticks too
if (
$self->true( $self->{'xy_plot'} )
&& ( $self->isa('Chart::Lines')
|| $self->isa('Chart::Points')
|| $self->isa('Chart::LinesPoints')
|| $self->isa('Chart::Split')
|| $self->isa('Chart::ErrorBars') )
)
{
$self->_draw_x_number_ticks;
}
else
{ # draw the x ticks with strings
$self->_draw_x_ticks;
}
# now the y ticks
$self->_draw_y_ticks( $self->{'y_axes'} );
# then return
return 1;
}
## @fn private int _draw_x_number_ticks()
# draw the ticks and tick labels
# @return status
sub _draw_x_number_ticks
{
my $self = shift;
my $data = $self->{'dataref'};
my $font = $self->{'tick_label_font'};
my $textcolor = $self->_color_role_to_index('text');
my $misccolor = $self->_color_role_to_index('misc');
my ( $h, $w, $x1, $y1, $y2, $x2, $delta, $width, $label );
my @labels = @{ $self->{'x_tick_labels'} };
$self->{'grid_data'}->{'x'} = [];
#make sure we have a real font
unless ( ( ref $font ) eq 'GD::Font' )
{
croak "The tick label font you specified isn't a GD font object";
}
#get height and width of the font
( $h, $w ) = ( $font->height, $font->width );
#store actual borders, for a possible later repair
$self->{'temp_x_min'} = $self->{'curr_x_min'};
$self->{'temp_x_max'} = $self->{'curr_x_max'};
$self->{'temp_y_max'} = $self->{'curr_y_max'};
$self->{'temp_y_min'} = $self->{'curr_y_min'};
#get the right x-value and width
#The one and only way to get the RIGHT x value and the width
if ( $self->{'y_axes'} =~ /^right$/i )
{
$x1 = $self->{'curr_x_min'};
$width =
$self->{'curr_x_max'} -
$x1 -
( $w * $self->{'y_tick_label_length'} ) -
3 * $self->{'text_space'} -
$self->{'tick_len'};
}
elsif ( $self->{'y_axes'} =~ /^both$/i )
{
$x1 = $self->{'curr_x_min'} + ( $w * $self->{'y_tick_label_length'} ) + 3 * $self->{'text_space'} + $self->{'tick_len'};
$width =
$self->{'curr_x_max'} -
$x1 -
( $w * $self->{'y_tick_label_length'} ) -
( 3 * $self->{'text_space'} ) -
$self->{'tick_len'};
}
else
{
$x1 = $self->{'curr_x_min'} + ( $w * $self->{'y_tick_label_length'} ) + 3 * $self->{'text_space'} + $self->{'tick_len'};
$width = $self->{'curr_x_max'} - $x1;
}
#get the delta value
$delta = $width / ( $self->{'x_number_ticks'} - 1 );
#draw the labels
$y2 = $y1;
if ( $self->{'x_ticks'} =~ /^normal/i )
{ #just normal ticks
#get the point for updating later
$y1 = $self->{'curr_y_max'} - 2 * $self->{'text_space'} - $h - $self->{'tick_len'};
#get the start point
$y2 = $y1 + $self->{'tick_len'} + $self->{'text_space'};
if ( $self->{'xlabels'} )
{
unless ( $self->{'xrange'} )
{
croak "Base.pm: xrange must be specified with xlabels!\n";
}
my $xmin = $self->{'xrange'}[0];
my $xmax = $self->{'xrange'}[1];
my @labels = @{ $self->{'xlabels'}[0] };
my @vals = @{ $self->{'xlabels'}[1] };
my $delta = $width / ( $xmax - $xmin );
for ( 0 .. $#labels )
{
my $label = $labels[$_];
my $val = $vals[$_];
$x2 = $x1 + ( $delta * $val ) - ( 0.5 * $w * length($label) );
$self->{'gd_obj'}->string( $font, $x2, $y2, $label, $textcolor );
#print "write x-label '".$label."' at ($x2,$y2)\n";
}
}
else
{
my $last_x = 'undefined';
for ( 0 .. $#labels )
{
$label = $self->{f_x_tick}->( $self->{'x_tick_labels'}[$_] );
$x2 = $x1 + ( $delta * $_ ) - ( 0.5 * $w * length($label) );
if ( $last_x eq 'undefined'
or $last_x < $x2 )
{
$self->{'gd_obj'}->string( $font, $x2, $y2, $label, $textcolor );
$last_x = $x2 + ( $w * length($label) );
}
#print "last_x = $last_x, write string '".$label."' at ($x2,$y2) to '$_'\n";
}
}
}
elsif ( $self->{'x_ticks'} =~ /^staggered/i )
{ #staggered ticks
#get the point for updating later
$y1 = $self->{'curr_y_max'} - 3 * $self->{'text_space'} - 2 * $h - $self->{'tick_len'};
if ( $self->{'xlabels'} )
{
unless ( $self->{'xrange'} )
{
croak "Base.pm: xrange must be specified with xlabels!\n";
}
my $xmin = $self->{'xrange'}[0];
my $xmax = $self->{'xrange'}[1];
my @labels = @{ $self->{'xlabels'}[0] };
my @vals = @{ $self->{'xlabels'}[1] };
my $delta = $width / ( $xmax - $xmin );
for ( 0 .. $#labels )
{
my $label = $labels[$_];
my $val = $vals[$_];
$x2 = $x1 + ( $delta * $val ) - ( 0.5 * $w * length($label) );
unless ( $_ % 2 )
{
$y2 = $y1 + $self->{'text_space'} + $self->{'tick_len'};
}
else
{
$y2 = $y1 + $h + 2 * $self->{'text_space'} + $self->{'tick_len'};
}
$self->{'gd_obj'}->string( $font, $x2, $y2, $label, $textcolor );
#print "write x-label '".$label."' at ($x2,$y2)\n";
}
}
else
{
for ( 0 .. $#labels )
{
$label = $self->{f_x_tick}->( $self->{'x_tick_labels'}[$_] );
$x2 = $x1 + ( $delta * $_ ) - ( 0.5 * $w * length($label) );
unless ( $_ % 2 )
{
$y2 = $y1 + $self->{'text_space'} + $self->{'tick_len'};
}
else
{
$y2 = $y1 + $h + 2 * $self->{'text_space'} + $self->{'tick_len'};
}
$self->{'gd_obj'}->string( $font, $x2, $y2, $label, $textcolor );
}
}
}
elsif ( $self->{'x_ticks'} =~ /^vertical/i )
{ #vertical ticks
#get the point for updating later
$y1 = $self->{'curr_y_max'} - 2 * $self->{'text_space'} - $w * $self->{'x_tick_label_length'} - $self->{'tick_len'};
if ( $self->{'xlabels'} )
{
unless ( $self->{'xrange'} )
{
croak "Base.pm: xrange must be specified with xlabels!\n";
}
my $xmin = $self->{'xrange'}[0];
my $xmax = $self->{'xrange'}[1];
my @labels = @{ $self->{'xlabels'}[0] };
my @vals = @{ $self->{'xlabels'}[1] };
my $delta = $width / ( $xmax - $xmin );
for ( 0 .. $#labels )
{
my $label = $labels[$_];
my $val = $vals[$_];
$y2 = $y1 + $self->{'tick_len'} + $w * length($label) + $self->{'text_space'};
$x2 = $x1 + ( $delta * $val ) - ( $h / 2 );
$self->{'gd_obj'}->stringUp( $font, $x2, $y2, $label, $textcolor );
#print "write x-label '".$label."' at ($x2,$y2)\n";
}
}
else
{
for ( 0 .. $#labels )
{
$label = $self->{f_x_tick}->( $self->{'x_tick_labels'}[$_] );
#get the start point
$y2 = $y1 + $self->{'tick_len'} + $w * length($label) + $self->{'text_space'};
$x2 = $x1 + ( $delta * $_ ) - ( $h / 2 );
$self->{'gd_obj'}->stringUp( $font, $x2, $y2, $label, $textcolor );
}
}
}
else
{
croak "I don't understand the type of x-ticks you specified\n"
. "x-ticks must be one of 'normal', 'staggered' or 'vertical' but not of '"
. $self->{'x_ticks'} . "'.";
}
#update the curr y max value
$self->{'curr_y_max'} = $y1;
#draw the ticks
$y1 = $self->{'curr_y_max'};
$y2 = $self->{'curr_y_max'} + $self->{'tick_len'};
#draw grid lines
if ( $self->{'xlabels'} )
{
unless ( $self->{'xrange'} )
{
croak "Base.pm: xrange must be specified with xlabels!\n";
}
my $xmin = $self->{'xrange'}[0];
my $xmax = $self->{'xrange'}[1];
my @vals = @{ $self->{'xlabels'}[1] };
my $delta = $width / ( $xmax - $xmin );
for ( 0 .. $#vals )
{
my $val = $vals[$_];
$x2 = ($x1) + ( $delta * $val );
$self->{'gd_obj'}->line( $x2, $y1, $x2, $y2, $misccolor );
if ( ( $self->{'grid_lines'} =~ /^true$/i )
or ( $self->{'x_grid_lines'} =~ /^true$/i ) )
{
$self->{'grid_data'}->{'x'}->[$_] = $x2;
}
}
}
else
{
for ( 0 .. $#labels )
{
$x2 = $x1 + ( $delta * $_ );
$self->{'gd_obj'}->line( $x2, $y1, $x2, $y2, $misccolor );
if ( ( $self->true( $self->{'grid_lines'} ) )
or ( $self->true( $self->{'x_grid_lines'} ) ) )
{
$self->{'grid_data'}->{'x'}->[$_] = $x2;
}
}
}
return 1;
}
## @fn private int _draw_x_ticks()
# draw the x-ticks and their labels
# @return status
sub _draw_x_ticks
{
my $self = shift;
my $data = $self->{'dataref'};
my $font = $self->{'tick_label_font'};
my $textcolor = $self->_color_role_to_index('text');
my $misccolor = $self->_color_role_to_index('misc');
my $label;
my ( $h, $w );
my ( $x1, $x2, $y1, $y2 );
my ( $width, $delta );
my ($stag);
$self->{'grid_data'}->{'x'} = [];
# make sure we got a real font
unless ( ( ref $font ) eq 'GD::Font' )
{
croak "The tick label font you specified isn\'t a GD Font object";
}
# get the height and width of the font
( $h, $w ) = ( $font->height, $font->width );
# maybe, we need the actual x and y values later for drawing the x-ticks again
# in the draw function in the lines modul. So copy them.
$self->{'temp_x_min'} = $self->{'curr_x_min'};
$self->{'temp_x_max'} = $self->{'curr_x_max'};
$self->{'temp_y_min'} = $self->{'curr_y_min'};
$self->{'temp_y_max'} = $self->{'curr_y_max'};
# allow for the amount of space the y-ticks will push the
# axes over to the right
## _draw_y_ticks allows 3 * text_space, not 1 * ; this caused mismatch between
## the ticks (and grid lines) and the data.
# $x1 = $self->{'curr_x_min'} + ($w * $self->{'y_tick_label_length'})
# + $self->{'text_space'} + $self->{'tick_len'};
## And, what about the right-tick space?? Only affects Composite, I guess....
#The one and only way to get the RIGHT x value and the width
if ( $self->{'y_axes'} =~ /^right$/i )
{
$x1 = $self->{'curr_x_min'};
$width =
$self->{'curr_x_max'} -
$x1 -
( $w * $self->{'y_tick_label_length'} ) -
3 * $self->{'text_space'} -
$self->{'tick_len'};
}
elsif ( $self->{'y_axes'} =~ /^both$/i )
{
$x1 = $self->{'curr_x_min'} + ( $w * $self->{'y_tick_label_length'} ) + 3 * $self->{'text_space'} + $self->{'tick_len'};
$width =
$self->{'curr_x_max'} -
$x1 -
( $w * $self->{'y_tick_label_length'} ) -
3 * $self->{'text_space'} -
$self->{'tick_len'};
}
else
{
$x1 = $self->{'curr_x_min'} + ( $w * $self->{'y_tick_label_length'} ) + 3 * $self->{'text_space'} + $self->{'tick_len'};
$width = $self->{'curr_x_max'} - $x1;
}
#the same for the y value, but not so tricky
$y1 = $self->{'curr_y_max'} - $h - $self->{'text_space'};
# get the delta value, figure out how to draw the labels
$delta = $width / ( $self->{'num_datapoints'} > 0 ? $self->{'num_datapoints'} : 1 );
if ( !defined( $self->{'skip_x_ticks'} ) )
{
$self->{'skip_x_ticks'} = 1;
}
elsif ( $self->{'skip_x_ticks'} == 0 )
{
$self->{'skip_x_ticks'} = 1;
}
if ( $delta <= ( $self->{'x_tick_label_length'} * $w ) / $self->{'skip_x_ticks'} )
{
if ( $self->{'x_ticks'} =~ /^normal$/i )
{
$self->{'x_ticks'} = 'staggered';
}
}
# now draw the labels
if ( $self->{'x_ticks'} =~ /^normal$/i )
{ # normal ticks
if ( $self->{'skip_x_ticks'} > 1 )
{ # draw only every nth tick and label
for ( 0 .. int( ( $self->{'num_datapoints'} - 1 ) / $self->{'skip_x_ticks'} ) )
{
if ( defined( $data->[0][ $_ * $self->{'skip_x_ticks'} ] ) )
{
$label = $self->{f_x_tick}->( $data->[0][ $_ * $self->{'skip_x_ticks'} ] );
$x2 = $x1 + ( $delta / 2 ) + ( $delta * ( $_ * $self->{'skip_x_ticks'} ) ) - ( $w * length($label) ) / 2;
$self->{'gd_obj'}->string( $font, $x2, $y1, $label, $textcolor );
}
}
}
elsif ( $self->{'custom_x_ticks'} )
{ # draw only the ticks they wanted
for ( @{ $self->{'custom_x_ticks'} } )
{
if ( defined($_) )
{
$label = $self->{f_x_tick}->( $data->[0][$_] );
$x2 = $x1 + ( $delta / 2 ) + ( $delta * $_ ) - ( $w * length($label) ) / 2;
$self->{'gd_obj'}->string( $font, $x2, $y1, $label, $textcolor );
}
}
}
else
{
for ( 0 .. $self->{'num_datapoints'} - 1 )
{
if ( defined($_) )
{
$label = $self->{f_x_tick}->( $data->[0][$_] );
$x2 = $x1 + ( $delta / 2 ) + ( $delta * $_ ) - ( $w * length($label) ) / 2;
$self->{'gd_obj'}->string( $font, $x2, $y1, $label, $textcolor );
}
}
}
}
elsif ( $self->{'x_ticks'} =~ /^staggered$/i )
{ # staggered ticks
if ( $self->{'skip_x_ticks'} > 1 )
{
$stag = 0;
for ( 0 .. int( ( $self->{'num_datapoints'} - 1 ) / $self->{'skip_x_ticks'} ) )
{
if ( defined( $data->[0][ $_ * $self->{'skip_x_ticks'} ] ) )
{
$x2 =
$x1 +
( $delta / 2 ) +
( $delta * ( $_ * $self->{'skip_x_ticks'} ) ) -
( $w * length( $self->{f_x_tick}->( $data->[0][ $_ * $self->{'skip_x_ticks'} ] ) ) ) / 2;
if ( ( $stag % 2 ) == 1 )
{
$y1 -= $self->{'text_space'} + $h;
}
$self->{'gd_obj'}
->string( $font, $x2, $y1, $self->{f_x_tick}->( $data->[0][ $_ * $self->{'skip_x_ticks'} ] ),
$textcolor );
if ( ( $stag % 2 ) == 1 )
{
$y1 += $self->{'text_space'} + $h;
}
$stag++;
}
}
}
elsif ( $self->{'custom_x_ticks'} )
{
$stag = 0;
for ( sort ( @{ $self->{'custom_x_ticks'} } ) )
{ # sort to make it look good
if ( defined($_) )
{
$x2 = $x1 + ( $delta / 2 ) + ( $delta * $_ ) - ( $w * length( $self->{f_x_tick}->( $data->[0][$_] ) ) ) / 2;
if ( ( $stag % 2 ) == 1 )
{
$y1 -= $self->{'text_space'} + $h;
}
$self->{'gd_obj'}->string( $font, $x2, $y1, $self->{f_x_tick}->( $data->[0][$_] ), $textcolor );
if ( ( $stag % 2 ) == 1 )
{
$y1 += $self->{'text_space'} + $h;
}
$stag++;
}
}
}
else
{
for ( 0 .. $self->{'num_datapoints'} - 1 )
{
if ( defined( $self->{f_x_tick}->( $data->[0][$_] ) ) )
{
$x2 = $x1 + ( $delta / 2 ) + ( $delta * $_ ) - ( $w * length( $self->{f_x_tick}->( $data->[0][$_] ) ) ) / 2;
if ( ( $_ % 2 ) == 1 )
{
$y1 -= $self->{'text_space'} + $h;
}
$self->{'gd_obj'}->string( $font, $x2, $y1, $self->{f_x_tick}->( $data->[0][$_] ), $textcolor );
if ( ( $_ % 2 ) == 1 )
{
$y1 += $self->{'text_space'} + $h;
}
}
}
}
}
elsif ( $self->{'x_ticks'} =~ /^vertical$/i )
{ # vertical ticks
$y1 = $self->{'curr_y_max'} - $self->{'text_space'};
if ( $self->{'skip_x_ticks'} > 1 )
{
for ( 0 .. int( ( $self->{'num_datapoints'} - 1 ) / $self->{'skip_x_ticks'} ) )
{
if ( defined($_) )
{
$x2 = $x1 + ( $delta / 2 ) + ( $delta * ( $_ * $self->{'skip_x_ticks'} ) ) - $h / 2;
$y2 = $y1 - (
(
$self->{'x_tick_label_length'} -
length( $self->{f_x_tick}->( $data->[0][ $_ * $self->{'skip_x_ticks'} ] ) )
) * $w
);
$self->{'gd_obj'}
->stringUp( $font, $x2, $y2, $self->{f_x_tick}->( $data->[0][ $_ * $self->{'skip_x_ticks'} ] ),
$textcolor );
}
}
}
elsif ( $self->{'custom_x_ticks'} )
{
for ( @{ $self->{'custom_x_ticks'} } )
{
if ( defined($_) )
{
$x2 = $x1 + ( $delta / 2 ) + ( $delta * $_ ) - $h / 2;
$y2 = $y1 - ( ( $self->{'x_tick_label_length'} - length( $self->{f_x_tick}->( $data->[0][$_] ) ) ) * $w );
$self->{'gd_obj'}->stringUp( $font, $x2, $y2, $self->{f_x_tick}->( $data->[0][$_] ), $textcolor );
}
}
}
else
{
for ( 0 .. $self->{'num_datapoints'} - 1 )
{
if ( defined($_) )
{
$x2 = $x1 + ( $delta / 2 ) + ( $delta * $_ ) - $h / 2;
$y2 = $y1 - ( ( $self->{'x_tick_label_length'} - length( $self->{f_x_tick}->( $data->[0][$_] ) ) ) * $w );
$self->{'gd_obj'}->stringUp( $font, $x2, $y2, $self->{f_x_tick}->( $data->[0][$_] ), $textcolor );
}
}
}
}
else
{ # error time
carp "I don't understand the type of x-ticks you specified";
}
# update the current y-max value
if ( $self->{'x_ticks'} =~ /^normal$/i )
{
$self->{'curr_y_max'} -= $h + ( 2 * $self->{'text_space'} );
}
elsif ( $self->{'x_ticks'} =~ /^staggered$/i )
{
$self->{'curr_y_max'} -= ( 2 * $h ) + ( 3 * $self->{'text_space'} );
}
elsif ( $self->{'x_ticks'} =~ /^vertical$/i )
{
$self->{'curr_y_max'} -= ( $w * $self->{'x_tick_label_length'} ) + ( 2 * $self->{'text_space'} );
}
# now plot the ticks
$y1 = $self->{'curr_y_max'};
$y2 = $self->{'curr_y_max'} - $self->{'tick_len'};
if ( $self->{'skip_x_ticks'} > 1 )
{
for ( 0 .. int( ( $self->{'num_datapoints'} - 1 ) / $self->{'skip_x_ticks'} ) )
{
$x2 = $x1 + ( $delta / 2 ) + ( $delta * ( $_ * $self->{'skip_x_ticks'} ) );
$self->{'gd_obj'}->line( $x2, $y1, $x2, $y2, $misccolor );
if ( $self->true( $self->{'grid_lines'} )
or $self->true( $self->{'x_grid_lines'} ) )
{
$self->{'grid_data'}->{'x'}->[$_] = $x2;
}
}
}
elsif ( $self->{'custom_x_ticks'} )
{
for ( @{ $self->{'custom_x_ticks'} } )
{
$x2 = $x1 + ( $delta / 2 ) + ( $delta * $_ );
$self->{'gd_obj'}->line( $x2, $y1, $x2, $y2, $misccolor );
if ( $self->true( {'grid_lines'} )
or $self->true( $self->{'x_grid_lines'} ) )
{
$self->{'grid_data'}->{'x'}->[$_] = $x2;
}
}
}
else
{
for ( 0 .. $self->{'num_datapoints'} - 1 )
{
$x2 = $x1 + ( $delta / 2 ) + ( $delta * $_ );
$self->{'gd_obj'}->line( $x2, $y1, $x2, $y2, $misccolor );
if ( $self->true( $self->{'grid_lines'} )
or $self->true( $self->{'x_grid_lines'} ) )
{
$self->{'grid_data'}->{'x'}->[$_] = $x2;
}
}
}
# update the current y-max value
$self->{'curr_y_max'} -= $self->{'tick_len'};
}
## @fn private int _draw_y_ticks()
# draw the y-ticks and their labels
# @return status
sub _draw_y_ticks
{
my $self = shift;
my $side = shift || 'left';
my $data = $self->{'dataref'};
my $font = $self->{'tick_label_font'};
my $textcolor = $self->_color_role_to_index('text');
my $misccolor = $self->_color_role_to_index('misc');
my @labels = @{ $self->{'y_tick_labels'} };
my ( $w, $h );
my ( $x1, $x2, $y1, $y2 );
my ( $height, $delta, $label );
my ( $s, $f );
$self->{grid_data}->{'y'} = [];
$self->{grid_data}->{'y2'} = [];
# make sure we got a real font
unless ( ( ref $font ) eq 'GD::Font' )
{
croak "The tick label font you specified isn\'t a GD Font object";
}
# find out how big the font is
( $w, $h ) = ( $font->width, $font->height );
# figure out which ticks not to draw
if ( $self->{'min_val'} >= 0 )
{
$s = 1;
$f = $#labels;
}
elsif ( $self->{'max_val'} <= 0 )
{
$s = 0;
$f = $#labels; # -1 entfernt
}
else
{
$s = 0;
$f = $#labels;
}
# now draw them
if ( $side eq 'right' )
{ # put 'em on the right side of the chart
# get the base x-y values, and the delta value
$x1 =
$self->{'curr_x_max'} - $self->{'tick_len'} - ( 3 * $self->{'text_space'} ) - ( $w * $self->{'y_tick_label_length'} );
$y1 = $self->{'curr_y_max'};
$height = $self->{'curr_y_max'} - $self->{'curr_y_min'};
$self->{'y_ticks'} = 2 if $self->{'y_ticks'} < 2;
$delta = $height / ( $self->{'y_ticks'} - 1 );
# update the curr_x_max value
$self->{'curr_x_max'} = $x1;
# now draw the ticks
$x2 = $x1 + $self->{'tick_len'};
for ( $s .. $f )
{
$y2 = $y1 - ( $delta * $_ );
$self->{'gd_obj'}->line( $x1, $y2, $x2, $y2, $misccolor );
if ( $self->true( $self->{'grid_lines'} )
or $self->true( $self->{'y2_grid_lines'} ) )
{
$self->{'grid_data'}->{'y2'}->[$_] = $y2;
}
}
# update the current x-min value
$x1 += $self->{'tick_len'} + ( 2 * $self->{'text_space'} );
$y1 -= $h / 2;
# now draw the labels
for ( 0 .. $#labels )
{
$y2 = $y1 - ( $delta * $_ );
$self->{'gd_obj'}->string( $font, $x1, $y2, $self->{'y_tick_labels'}[$_], $textcolor );
}
}
elsif ( $side eq 'both' )
{ # put the ticks on the both sides
## left side first
# get the base x-y values
$x1 = $self->{'curr_x_min'} + $self->{'text_space'};
$y1 = $self->{'curr_y_max'} - $h / 2;
# now draw the labels
$height = $self->{'curr_y_max'} - $self->{'curr_y_min'};
$delta = $height / ( $self->{'y_ticks'} - 1 );
for ( 0 .. $#labels )
{
$label = $self->{'y_tick_labels'}[$_];
$y2 = $y1 - ( $delta * $_ );
$x2 = $x1 + ( $w * $self->{'y_tick_label_length'} ) - ( $w * length($label) );
$self->{'gd_obj'}->string( $font, $x2, $y2, $label, $textcolor );
}
# and update the current x-min value
$self->{'curr_x_min'} += ( 3 * $self->{'text_space'} ) + ( $w * $self->{'y_tick_label_length'} );
# now draw the ticks (skipping the one at zero);
$x1 = $self->{'curr_x_min'};
$x2 = $self->{'curr_x_min'} + $self->{'tick_len'};
$y1 += $h / 2;
for ( $s .. $f )
{
$y2 = $y1 - ( $delta * $_ );
$self->{'gd_obj'}->line( $x1, $y2, $x2, $y2, $misccolor );
if ( $self->true( $self->{grid_lines} )
or $self->true( $self->{'y_grid_lines'} ) )
{
$self->{'grid_data'}->{'y'}->[$_] = $y2;
}
}
# update the current x-min value
$self->{'curr_x_min'} += $self->{'tick_len'};
## now the right side
# get the base x-y values, and the delta value
$x1 =
$self->{'curr_x_max'} - $self->{'tick_len'} - ( 3 * $self->{'text_space'} ) - ( $w * $self->{'y_tick_label_length'} );
$y1 = $self->{'curr_y_max'};
$height = $self->{'curr_y_max'} - $self->{'curr_y_min'};
$delta = $height / ( $self->{'y_ticks'} - 1 );
# update the curr_x_max value
$self->{'curr_x_max'} = $x1;
# now draw the ticks (skipping the one at zero);
$x2 = $x1 + $self->{'tick_len'};
for ( $s .. $f )
{
$y2 = $y1 - ( $delta * $_ );
$self->{'gd_obj'}->line( $x1, $y2, $x2, $y2, $misccolor ); # draw tick_line
if ( $self->true( $self->{grid_lines} )
or $self->true( $self->{'y2_grid_lines'} ) )
{
$self->{'grid_data'}->{'y2'}->[$_] = $y2;
}
}
# update the current x-min value
$x1 += $self->{'tick_len'} + ( 2 * $self->{'text_space'} );
$y1 -= $h / 2;
# now draw the labels
for ( 0 .. $#labels )
{
$y2 = $y1 - ( $delta * $_ );
$self->{'gd_obj'}->string( $font, $x1, $y2, $self->{'y_tick_labels'}[$_], $textcolor );
}
}
else
{ # just the left side
# get the base x-y values
$x1 = $self->{'curr_x_min'} + $self->{'text_space'};
$y1 = $self->{'curr_y_max'} - $h / 2;
# now draw the labels
$height = $self->{'curr_y_max'} - $self->{'curr_y_min'};
$self->{'y_ticks'} = 2 if $self->{'y_ticks'} < 2;
$delta = $height / ( $self->{'y_ticks'} - 1 );
for ( 0 .. $#labels )
{
$label = $self->{'y_tick_labels'}[$_];
$y2 = $y1 - ( $delta * $_ );
$x2 = $x1 + ( $w * $self->{'y_tick_label_length'} ) - ( $w * length($label) );
$self->{'gd_obj'}->string( $font, $x2, $y2, $label, $textcolor );
}
# and update the current x-min value
$self->{'curr_x_min'} += ( 3 * $self->{'text_space'} ) + ( $w * $self->{'y_tick_label_length'} );
# now draw the ticks
$x1 = $self->{'curr_x_min'};
$x2 = $self->{'curr_x_min'} + $self->{'tick_len'};
$y1 += $h / 2;
for ( $s .. $f )
{
$y2 = $y1 - ( $delta * $_ );
$self->{'gd_obj'}->line( $x1, $y2, $x2, $y2, $misccolor );
if ( $self->true( $self->{'grid_lines'} )
or $self->true( $self->{'y_grid_lines'} ) )
{
$self->{'grid_data'}->{'y'}->[$_] = $y2;
}
}
# update the current x-min value
$self->{'curr_x_min'} += $self->{'tick_len'};
}
# and return
return 1;
}
## @fn private int _grey_background()
# put a grey background on the plot of the data itself
# @return status
sub _grey_background
{
my $self = shift;
# draw it
$self->{'gd_obj'}
->filledRectangle( $self->{'curr_x_min'}, $self->{'curr_y_min'}, $self->{'curr_x_max'}, $self->{'curr_y_max'},
$self->_color_role_to_index('grey_background') );
# now return
return 1;
}
## @fn private int _draw_grid_lines()
# draw grid_lines
# @return status
sub _draw_grid_lines
{
my $self = shift;
$self->_draw_x_grid_lines();
$self->_draw_y_grid_lines();
$self->_draw_y2_grid_lines();
return 1;
}
## @fn private int _draw_x_grid_lines()
# draw grid_lines for x
# @return status
sub _draw_x_grid_lines
{
my $self = shift;
my $grid_role = shift || 'x_grid_lines';
my $gridcolor = $self->_color_role_to_index($grid_role);
my ( $x, $y, $i );
foreach $x ( @{ $self->{grid_data}->{'x'} } )
{
if ( defined $x )
{
$self->{gd_obj}->line( ( $x, $self->{'curr_y_min'} + 1 ), $x, ( $self->{'curr_y_max'} - 1 ), $gridcolor );
}
}
return 1;
}
## @fn private int _draw_y_grid_lines()
# draw grid_lines for y
# @return status
sub _draw_y_grid_lines
{
my $self = shift;
my $grid_role = shift || 'y_grid_lines';
my $gridcolor = $self->_color_role_to_index($grid_role);
my ( $x, $y, $i );
#Look if I'm an HorizontalBars object
if ( $self->isa('Chart::HorizontalBars') )
{
for ( $i = 0 ; $i < ( $#{ $self->{grid_data}->{'y'} } ) + 1 ; $i++ )
{
$y = $self->{grid_data}->{'y'}->[$i];
$self->{gd_obj}->line( ( $self->{'curr_x_min'} + 1 ), $y, ( $self->{'curr_x_max'} - 1 ), $y, $gridcolor );
}
}
else
{
# loop for y values is a little different. This is to discard the first
# and last values we were given - the top/bottom of the chart area.
for ( $i = 1 ; $i < ( $#{ $self->{grid_data}->{'y'} } ) + 1 ; $i++ )
{ ###
$y = $self->{grid_data}->{'y'}->[$i];
$self->{gd_obj}->line( ( $self->{'curr_x_min'} + 1 ), $y, ( $self->{'curr_x_max'} - 1 ), $y, $gridcolor );
}
}
return 1;
}
## @fn private int _draw_y2_grid_lines()
# draw grid_lines for y
# @return status
sub _draw_y2_grid_lines
{
my $self = shift;
my $grid_role = shift || 'y2_grid_lines';
my $gridcolor = $self->_color_role_to_index($grid_role);
my ( $x, $y, $i );
#Look if I'm an HorizontalBars object
if ( $self->isa('Chart::HorizontalBars') )
{
for ( $i = 0 ; $i < ( $#{ $self->{grid_data}->{'y'} } ) + 1 ; $i++ )
{
$y = $self->{grid_data}->{'y'}->[$i];
$self->{gd_obj}->line( ( $self->{'curr_x_min'} + 1 ), $y, ( $self->{'curr_x_max'} - 1 ), $y, $gridcolor );
}
}
else
{
# loop for y2 values is a little different. This is to discard the first
# and last values we were given - the top/bottom of the chart area.
for ( $i = 1 ; $i < $#{ $self->{grid_data}->{'y2'} } ; $i++ )
{
$y = $self->{grid_data}->{'y2'}->[$i];
$self->{gd_obj}->line( ( $self->{'curr_x_min'} + 1 ), $y, ( $self->{'curr_x_max'} - 1 ), $y, $gridcolor );
}
}
return 1;
}
## @fn private int _prepare_brush($color,$type,$role)
# prepare brush
#
# @details
# set the gdBrush object to tick GD into drawing fat lines & points
# of interesting shapes
# Needed by "Lines", "Points" and "LinesPoints"
# All hacked up by Richard Dice Sunday 16 May 1999
#
# @param $color
# @param $type 'line','point'
# @param $role
#
# @return status
sub _prepare_brush
{
my $self = shift;
my $color = shift;
my $type = shift;
my $role = shift || 'default';
my $brushStyle = $self->{'brushStyle'};
if ( defined $role )
{
my (@brushStyles) = $self->_brushStyles_of_roles($role);
$brushStyle = $brushStyles[0];
}
#print STDERR "role=$role\n";
# decide what $type should be in the event that a param isn't
# passed -- this is necessary to preserve backward compatibility
# with apps that use this module prior to putting _prepare_brush
# in with Base.pm
if ( !defined($type) ) { $type = 'point'; }
if ( ( !length($type) )
|| ( !grep { $type eq $_ } ( 'line', 'point' ) ) )
{
$brushStyle = $self->{'brushStyle'};
$type = 'line' if ref $self eq 'Chart::Lines';
$type = 'point' if ref $self eq 'Chart::Points';
}
my ( $radius, @rgb, $brush, $white, $newcolor );
# get the rgb values for the desired color
@rgb = $self->{'gd_obj'}->rgb($color);
# get the appropriate brush size
if ( $type eq 'line' )
{
$radius = $self->{'brush_size'} / 2;
}
elsif ( $type eq 'point' )
{
$radius = $self->{'pt_size'} / 2;
}
# create the new image
$brush = GD::Image->new( $radius * 2, $radius * 2 );
# get the colors, make the background transparent
$white = $brush->colorAllocate( 255, 255, 255 );
$newcolor = $brush->colorAllocate(@rgb);
$brush->transparent($white);
# draw the circle
if ( $type eq 'line' )
{
$brush->arc( $radius - 1, $radius - 1, $radius, $radius, 0, 360, $newcolor );
$brush->fill( $radius - 1, $radius - 1, $newcolor );
# RLD
#
# Does $brush->fill really have to be here? Dunno... this
# seems to be a relic from earlier code
#
# Note that 'line's don't benefit from a $brushStyle... yet.
# It shouldn't be too tough to hack this in by taking advantage
# of GD's gdStyled facility
}
if ( $type eq 'point' )
{
$brushStyle = $self->{'brushStyle'}
unless grep { $brushStyle eq $_ } (
'FilledCircle', 'circle', 'donut', 'OpenCircle',
'triangle', 'upsidedownTriangle', 'square', 'hollowSquare',
'OpenRectangle', 'fatPlus', 'Star', 'OpenStar',
'FilledDiamond', 'OpenDiamond'
);
my ( $xc, $yc ) = ( $radius, $radius );
if ( grep { $brushStyle eq $_ } ( 'default', 'circle', 'donut', 'OpenCircle', 'FilledCircle' ) )
{
$brush->arc( $xc, $yc, $radius, $radius, 0, 360, $newcolor );
$brush->fill( $xc, $yc, $newcolor );
# draw a white (and therefore transparent) circle in the middle
# of the existing circle to make the "donut", if appropriate
if ( $brushStyle eq 'donut' || $brushStyle eq 'OpenCircle' )
{
$brush->arc( $xc, $yc, int( $radius / 2 ), int( $radius / 2 ), 0, 360, $white );
$brush->fill( $xc, $yc, $white );
}
}
if ( grep { $brushStyle eq $_ } ( 'triangle', 'upsidedownTriangle' ) )
{
my $poly = new GD::Polygon;
my $sign = ( $brushStyle eq 'triangle' ) ? 1 : (-1);
my $z = int( 0.8 * $radius ); # scaling factor
# co-ords are chosen to make an equilateral triangle
$poly->addPt( $xc, $yc - ( $z * $sign ) );
$poly->addPt( $xc + int( ( sqrt(3) * $z ) / 2 ), $yc + ( int( $z / 2 ) * $sign ) );
$poly->addPt( $xc - int( ( sqrt(3) * $z ) / 2 ), $yc + ( int( $z / 2 ) * $sign ) );
$brush->filledPolygon( $poly, $newcolor );
}
if ( $brushStyle eq 'fatPlus' )
{
my $poly = new GD::Polygon;
my $z = int( 0.3 * $radius );
$poly->addPt( $xc + $z, $yc + $z );
$poly->addPt( $xc + 2 * $z, $yc + $z );
$poly->addPt( $xc + 2 * $z, $yc - $z );
$poly->addPt( $xc + $z, $yc - $z );
$poly->addPt( $xc + $z, $yc - 2 * $z );
$poly->addPt( $xc - $z, $yc - 2 * $z );
$poly->addPt( $xc - $z, $yc - $z );
$poly->addPt( $xc - 2 * $z, $yc - $z );
$poly->addPt( $xc - 2 * $z, $yc + $z );
$poly->addPt( $xc - $z, $yc + $z );
$poly->addPt( $xc - $z, $yc + 2 * $z );
$poly->addPt( $xc + $z, $yc + 2 * $z );
$brush->filledPolygon( $poly, $newcolor );
}
if ( $brushStyle eq 'Star' || $brushStyle eq 'OpenStar' )
{
my $poly = new GD::Polygon;
my $z = int($radius);
my $sz = int( $z / 3 * 1.75 ); # small z
my $x1 = int( $xc + $z );
my $y1 = int($yc);
my ( $x2, $y2 );
my $xyRatio = $self->_xyRatio();
$poly->addPt( $x1, $y1 );
$x2 = $xc + int( $sz * 0.5 );
$y2 = $yc - int( $sz * 0.5 );
$poly->addPt( $x2, $y2 );
$x2 = $xc;
$y2 = $yc - $z;
$poly->addPt( $x2, $y2 );
$x2 = $xc - int( $sz * 0.5 );
$y2 = $yc - int( $sz * 0.5 );
$poly->addPt( $x2, $y2 );
$x2 = $xc - $z;
$y2 = $yc;
$poly->addPt( $x2, $y2 );
$x2 = $xc - int( $sz * 0.5 );
$y2 = $yc + int( $sz * 0.5 );
$poly->addPt( $x2, $y2 );
$x2 = $xc;
$y2 = $yc + $z;
$poly->addPt( $x2, $y2 );
$x2 = $xc + int( $sz * 0.5 );
$y2 = $yc + int( $sz * 0.5 );
$poly->addPt( $x2, $y2 );
if ( $brushStyle eq 'OpenStar' )
{
$brush->polygon( $poly, $newcolor );
}
else
{
$brush->filledPolygon( $poly, $newcolor );
}
}
if ( grep { $brushStyle eq $_ } ( 'square', 'hollowSquare', 'OpenRectangle' ) )
{
my $z = int( 0.5 * $radius );
$brush->filledRectangle( $xc - $z, $yc - $z, $xc + $z, $yc + $z, $newcolor );
if ( $brushStyle eq 'hollowSquare' || $brushStyle eq 'OpenRectangle' )
{
$z = int( $z / 2 );
$brush->filledRectangle( $xc - $z, $yc - $z, $xc + $z, $yc + $z, $white );
}
}
if ( grep { $brushStyle eq $_ } ( 'FilledDiamond', 'OpenDiamond' ) )
{
my $z = int( 0.75 * $radius );
$brush->line( $xc + $z, $yc, $xc, $yc + $z, $newcolor );
$brush->line( $xc, $yc + $z, $xc - $z, $yc, $newcolor );
$brush->line( $xc - $z, $yc, $xc, $yc - $z, $newcolor );
$brush->line( $xc, $yc - $z, $xc + $z, $yc, $newcolor );
if ( $brushStyle eq 'FilledDiamond' )
{
# and fill it
$brush->fill( $radius - 1, $radius - 1, $newcolor );
}
}
}
# set the new image as the main object's brush
return $brush;
}
## @fn private int _default_f_tick
# default tick conversion function
# This function is pointed to be $self->{f_x_tick} resp. $self->{f_y_tick}
# if the user does not provide another function
#
# @return status
sub _default_f_tick
{
my $label = shift;
return $label;
}
## @fn private float _xyRatio
# Get ratio width_x/width_y
#
# @return ratio width_x and width_y
sub _xyRatio
{
my $self = shift;
my $width_x = $self->{'curr_x_max'} - $self->{'curr_x_min'} + 1;
my $width_y = $self->{'curr_y_max'} - $self->{'curr_y_min'} + 1;
my $ratio = $width_x / $width_y;
return $ratio;
}
## @fn private float _xPixelInReal
# Get witdh of one Pixel in real coordinates in x-direction
#
#
# @return width(interval) of reality in x direction
#
sub _xPixelInReal
{
my $self = shift;
my $width_x = $self->{'curr_x_max'} - $self->{'curr_x_min'} + 1;
my ( $min, $max ) = $self->_find_x_range();
my $xRealWidth = $max - $min;
my $ratio = $xRealWidth / $width_x;
return $ratio;
}
## @fn private float _yPixelInReal
# Get witdh of one Pixel in real coordinates in y-direction
#
#
# @return width(interval) of reality in y direction
#
sub _yPixelInReal
{
my $self = shift;
my $width_y = $self->{'curr_y_max'} - $self->{'curr_y_min'} + 1;
my ( $min, $max, $flag_all_integers ) = $self->_find_y_range();
my $yRealWidth = $max - $min;
my $ratio = $yRealWidth / $width_y;
return $ratio;
}
## be a good module and return positive
1;