------------------------------------------------------------------------
Chart version 2.4.10
------------------------------------------------------------------------


----------
INSTALLING
----------

The usual.

	perl Makefile.PL
	make
	make test
	make install

This should install to your site_perl directory.  The test scripts also
put samples of the different charts in the samples/ directory.


-------------
PREREQUISITES
-------------

Lincoln Stein's GD module version 2.0.36 or higher.

-------
CHANGES
-------
2.4.10 Upload to pause.perl.org failed for version 2.4.9. Therefore, the version 2.4.9 was renamed to 2.4.10
       for a new upload.

2.4.9 Upload to pause.perl.org failed for version 2.4.8. Therefore, the version 2.4.8 was renamed to 2.4.9
      for a new upload.
       
2.4.8 Bug repaired: rt.cpan.org #81171::Composite w/two ::Lines and xy_plot ==> undefined value when drawing ticks
      (t/composite_7.t and t/composite_8.t are showing the differences)
      Base.pm: defined(@array) 
      Chart.pod corrected for deprecated @ARR->[$i]

2.4.7 Not published
      
2.4.6 Number of named colors extended
      Documentation.pdf explains the use of colors (Appendix added) 
      Corrections in base.pm, routines
       _draw_bottom_legends, _draw_x_number_ticks
       in LinesPoints.pm, routines  _draw_data
 
2.4.5 Typo in _draw_x_ticks corrected
      Methods scalar_png(), scalar_jpeg() corrected for result.
      Test routine t/scalarImage.t added
      Chart.pod corrected

2.4.4 The brush styles to points and linespoints are extended.
      Not only circles represent the points but a number of different
      brush styles, linke donut, Star and so on.

2.4.3 Corrections to imagemap production in Composite.pm and Lines.pm

2.4.2 Changes done by R. Dassing, Michael Potter
      Base.pm:
      The values for 'true' resp. 'false' may be of the following
      true: TRUE, true, T, t, 1 and defined
      false: FALSE, false, F, f, 0 or undefined
      
      Base.pm:
      Added new options xlabel and xrange which is valid for xy_plot
      and Chart::Lines, Chart::Points, Chart::LinesPoints,
      Chart::Split, Chart::ErrorBars.
      
      In order to use the labels, the chart module needs to have 'xlabels' 
      AND 'xrange' set. Below is some example code for use: 
      @labels = (['Jan', 'Feb','Mar'], 
                 ['10','40','70']); 
      $chart->set( xlabels => \@labels, 
                   xrange => [0,100] ); 
      This options allow to set and position labels at the x-axis arbitrary.

      add_dataset() and app_pt() accepts now datasets as lists and as
          references to list like already mentioned in the docs


      Pie.pm: 
      Optimized organisation of the placement of the labels.
      Added flag to avoid plotting of legends at all
      Using GD Version 2.0.36 as this version supports 'filledArc'

      Composite.pm:
      Correction due to Request 23166
      write the endmost value of input array
      in imagemap_data array
      
      Lines.pm:
      Correction due to Request 23166: 
      write the endmost value of input array
      in imagemap_data array
      
      
      
2.4.1 Changes done by Christine Zilker, Gerhard Stuhlpfarrer, R. Dassing
        Added new Options:
             ring             Draw a ring instead of a Pie
             legend_lines     Connect Pie and the description with a line
             stepline         Connect Lines and LinesPoints by a stepped line
             stepline_mode    (thanks to Gerhard Stuhlpfarrer)
             brush_size1      Define Brush Size for Composite 1 
             brush_size2      and 2
        Color problem in Pie fixed
        Positioning of the description optimized in Pie
        Division by zero problem fixed in Pie
        Module 'Bars' checks for numeric data a input on y-axis
        New Function added to Base:
            minimum  - determine minimal value of an array of numeric values
            maximum  - determine maximal value of an array of numeric values
            arccos   - arccos
            arcsin   - arcsin
        Some small bugs corrected:
            Base::_find_y_scale
            Base::_find_y_range   : check for numeric values
            Base::_find_x_range   : check for numeric values
        Latex sources for documentation included 
            (We hope to get a better documentation be a native english speaking person)
                 
2.3  Changes done by Christine Zilker:
        Added new Options: 
	     in Composite: 
                legend_example_height    changes thickness of the lines in the legend,
	        f_y_tick1, f_y_tick2 analog to f_y_tick 
                                         used for right and left y-axes
	     in Direction: 
                pairs                    

        Added the possibility to add more datasets in Chart::Direction 
			   
	Fixed "label space" problem in Pie
	Fixed dataset order (in the legend) in StackedBars
	Fixed problem of getting the right values if round2Tick is used
	Fixed problem of datavalues in _find_y_scale
	Some minor bugfixes	    

        Update of the Documentation (Documentation.pdf)

        The requested support of TruType fonts was currently dropped due to
        missing support in GD.pm (even in new versions)
        
        The print out of some hints and warnings where deleted not to confuse
        the user.

2.2: Composite.pm: imagemap_dump() repaired.

2.1: Changes done by Markus Brandl:
	new Modules added: ErrorBars.pm, HorizontalBars.pm, Pareto.pm,                          
	 
	Pie.pm, Split.pm and Direction.pm

        Subdirectory "doc" contains a Acrobat Reader Documentation.pdf file.

	Function add_datafile() added. It is now possible to add a complete
	datafile.

        Added new Options: precision, xy_plot, min_x_ticks, max_x_ticks,
	skip_y_ticks, skip_int_ticks, legend_label_value, y_axes,
	scale, interval, start, interval_ticks, sort, same_error, point,
	line, arrow, angle_interval, min_circles, max_circles
	Also added: the 'title' and 'x_label' options in the colors option 

	Documentation (Documentation.pdf) added.

	_find_x_scale, _find_x_range and _draw_x_number_ticks added to make 
	xy_plots possible.

	_sort_data has now a body. 

        Fixed integer ticks problem by adding the skip_int_ticks option
	Fixed f_x_ticks and f_y_ticks problem in Composite
	Fixed negative value problem in Bars
	Fixed min_val and max_val problem in draw_data function of all modules:
	Now, Chart plots the data only if the data is in the area of min_val and
	max_val! The border of bars in Bars, HorizontalBars and StackedBars will
	be plotted pink (not misccolor) if the data isn't in the min_val-max_val
	interval.
	Fixed custom_x_ticks problem in _draw_x_ticks
	Some other bugfixes.
	Updates in _find_y_scale, _round2tick, _calcTickInterval 
	   

1.1: Changes done by David Pottage:
        Plot scales can now have any magnitude. 
        It does not matter if the data covers a range of 100000000000 units
        or 0.00000000001 units, the scale will be correctly calculated.

        Ticks on plot scales are now plotted on 'round' numbers. 
        The number & spacing of ticks is chosen based on the data range.

        False zero graphs are now explicitly supported, and will be 
        generated if the data range merits it. 
        The instance field 'include_zero' should be set to zero to suppress this.

        Added: include_zero, min_y_ticks, max_y_ticks, integer_ticks_only

1.0.1:
        Fixed _draw_bottom_legend in Base.pm

0.99c-pre3 - 1.0:
        Fixed _draw_data in Lines.pm: lines are limited to the frame
        Added f_x_tick, f_y_tick
        Added jpeg(), cgi_jpeg() to produce the format jpeg
        Delete GIF support, added PNG and JPEG instead

0.99b - 0.99c-pre3:
	James F Miner <jfm@winternet.com>:
	Added Mountain chart type
	Added Patterns.  See t/mountain.t for details
	Bugfix for drifting x tick
	Improved internal color handling

	Richard Dice  <rdice@shadnet.shad.ca>:
	Added brush shapes for Points, LinesPoints
	Added scalar_gif

0.99a - 0.99b:
	Fixed left legend in composite charts
	Fixed no color problem when using composite charts w/ no legend
	Fixed color handling for datasets
	Added option for http header Pragma: no-cache
		Netscape 4.5 has a bug that breaks it, but it works with
		other browsers.  Any ideas for a workaround?

0.99 - 0.99a:
	Added use of undef() values to represent 'no data' for line breaks
	Added ylabel*_color options
	Added x_grid_lines, y_grid_lines & y2_grid_lines , and color options for each
	Cache disabling in cgi header: Reiner Nippes <nippes.r@gmx.de>
	Restored grid_lines option: Heinz-Guenter Kontny <hek@kronos.nic.dtag.de>
	Fixed a typo that broke imagemap data storage in Lines charts

0.94 - 0.99:
	Modified the 'title' option to correctly process newlines
	Deprecated the 'subtitle' option, will remove it in next release
	Changed the API for specifying colors
	Added support for printing to file handles
	Added Chart::Composite
	Added 'spaced_bars' to make it easy to differentiate the bars
	Added 'grey_background' to make plot background grey
	Added support for negative values in the datasets
	Added methods to remember and dump imagemap pixel information
	Included rgb.txt with distribution for WinXX users

0.93 - 0.94:
	Moved the legend down to be flush with the chart
	Fixed the long decimal y-tick label problem
	Fixed (for the last time, hopefully) the pre-5.004 compilation problem
	Fixed handling of undefined data points
	Added more colors for the default data colors
	Added the transparent gif option
	Added the option for user-specified colors
	Added the grid_lines option

0.92 - 0.93: 
	Fixed the sort problem
	Fixed the y-axis label centering problem
	Fixed pre-5.004 compilation problem
	Added StackedBars charts
	
------
MAINTAINER
------

Chart-Group (chart@fs.wettzell.de)

---------
COPYRIGHT
---------

Copyright(c) 1997-1998 David Bonner, 1999 Peter Clark, 
2001-2012 Chart-Group at BKG.
All rights reserved.
This program is free software; you can redistribute it and/or modify it under 
the same terms as Perl itself.