NAME

Tk::Chart::Areas - Extension of Canvas widget to create area lines graph.

SYNOPSIS

#!/usr/bin/perl
use strict;
use warnings;
use Tk;
use Tk::Chart::Areas;

my $mw = MainWindow->new(
  -title      => 'Tk::Chart::Areas example',
  -background => 'white',
);

my $chart = $mw->Areas(
  -title  => 'My Area graph title',
  -xlabel => 'X Label',
  -ylabel => 'Y Label',
  -linewidth => 1,

)->pack(qw / -fill both -expand 1 /);

my @data = ( 
    ['1st','2nd','3rd','4th','5th','6th','7th', '8th', '9th'],
    [    5,   12,   24,   33,   19,    8,    6,    15,    21],
    [   -1,   -2,   -5,   -6,   -3,  1.5,    1,   1.3,     2]
);

# Add a legend to the graph
my @Legends = ( 'legend 1', 'legend 2', );
$chart->set_legend(
  -title       => 'Title legend',
  -data        => \@Legends,
  -titlecolors => 'blue',
);

# Add help identification
$chart->set_balloon();

# Create the graph
$chart->plot( \@data );

MainLoop();

DESCRIPTION

Tk::Chart::Areas is an extension of the Canvas widget. It is an easy way to build an interactive Area line graph into your Perl Tk widget. The module is written entirely in Perl/Tk.

You can set a background gradient color.

You can change the color, font of title, labels (x and y) of the graph. You can set an interactive legend. The axes can be automatically scaled or set by the code. With this module it is possible to plot quantitative variables according to qualitative variables.

When the mouse cursor passes over a plotted line or its entry in the legend, the line and its entry will be turned to a color (that you can change) to help identify it.

BACKGROUND GRADIENT COLOR

You can set a background gradient color by using all methods of Tk::Canvas::GradientColor. By default, it is not enabled.

To enabled background gradient color the first time, you firstly have to call enabled_gradientcolor method and configure your color and type of gradient with set_gradientcolor.

$chart->enabled_gradientcolor();
$chart->set_gradientcolor(
    -start_color => '#6585ED',
    -end_color   => '#FFFFFF',
);

Please, read "WIDGET-SPECIFIC METHODS" in Tk::Canvas::GradientColor documentation to know all available configurations.

STANDARD OPTIONS

-background -borderwidth -closeenough -confine -cursor -height -highlightbackground -highlightcolor -highlightthickness -insertbackground -insertborderwidth -insertofftime -insertontime -insertwidth -relief -scrollregion -selectbackground -selectborderwidth -selectforeground -takefocus -width -xscrollcommand -xscrollincrement -yscrollcommand -yscrollincrement

Name: Viewsection

Class: ViewSection

Switch: -viewsection

If set to true value, we will see area sections separate by dash lines.

-viewsection => 0, # 0 or 1

Default : 1

Name: Outlinearea

Class: OutlineArea

Switch: -outlinearea

Change color of border areas.

-outlinearea => 'blue',

Default : 'black'

See "WIDGET-SPECIFIC OPTIONS" in Tk::Chart::Lines

The Canvas method creates a widget object. This object supports the configure and cget methods described in Tk::options which can be used to enquire and modify the options described above.

add_data

$chart->add_data(\@NewData, ?$legend): This method allows you to add data in your graph. If you have already plot data using plot method and if you want to add new data, you can use this method. Your graph will be updade.

Data array reference

Fill an array of arrays with the values of the datasets (\@data). Make sure that every array has the same size, otherwise Tk::Chart::Lines will complain and refuse to compile the graph.
```
my @NewData = (1,10,12,5,4);
$chart->add_data(\@NewData);
```
If your last graph has a legend, you have to add a legend entry for the new dataset. Otherwise, the legend graph will not be display (see below).

$legend

my @NewData = (1,10,12,5,4);
my $legend = 'New data set';
$chart->add_data(\@NewData, $legend);

clearchart

$chart->clearchart: This method allows you to clear the graph. The canvas will not be destroy. It's possible to redraw your last graph using the redraw method.

delete_balloon

$chart->delete_balloon: If you call this method, you disable help identification which has been enabled with set_balloon method.

disabled_automatic_redraw

$chart->disabled_automatic_redraw

When the graph is created and the widget size changes, the graph is automatically re-created. Call this method to avoid resizing.

$chart->disabled_automatic_redraw;

display_values

$chart->display_values(\@data_point_value)

To plot the value of data near the points area graph, call this method to control in a generic manner.

my @data_point_value = (
  [ 9,   2,   5,     6,   3,   1,   1,   3,   4 ],        # The first line data
  undef,                                                  # The second line data
  [ 'A', 'B', undef, 'D', 'E', 'F', 'G', 'H', undef ],    # The third line data
);
$chart->display_values( \@data_point_value );

In this example, values are added above each point of the first and third lines. The second line is undef, no values are printed in the graph. B value is printed above the second point of the third line data.

enabled_automatic_redraw

$chart->enabled_automatic_redraw

Use this method to allow your graph to be recreated automatically when the widget size change. When the graph is created for the first time, this method is called.

$chart->enabled_automatic_redraw;

plot

$chart->plot(\@data, ?arg): To display your graph the first time, plot the graph by using this method.

\@data

Fill an array of arrays with the x values and the values of the datasets (\@data). Make sure that every array have the same size, otherwise Tk::Chart::Areas will complain and refuse to compile the graph.
```
my @data = (
    [ '1st', '2nd', '3rd', '4th', '5th', '6th', '7th', '8th', '9th' ],
    [ 1,     2,     5,     6,     3,     1.5,   1,     3,     4  ],
    [ 4,     2,     5,     2,     3,     5.5,   7,     9,     4  ],
    [ 1,     2,     52,    6,     3,     17.5,  1,     43,    10 ]
);
```
@data have to contain a least two arrays, the x values and the values of the datasets.

If you don't have a value for a point in a dataset, you can use undef, and the point will be skipped.
```
[ 1,     undef,     5,     6,     3,     1.5,   undef,     3,     4 ]
```

-substitutionvalue => real number,

If you have a no real number value in a dataset, it will be replaced by a constant value.

Default : 0

my @data = (
     [     '1st',   '2nd', '3rd', '4th', '5th', '6th', '7th', '8th', '9th' ],
     [         1,    '--',     5,     6,     3,   1.5,     1,     3,     4 ],
     [ 'mistake',       2,     5,     2,     3,  'NA',     7,     9,     4 ],
     [         1,       2,    52,     6,     3,  17.5,     1,    43,     4 ],
);
$chart->plot( \@data,
  -substitutionvalue => '12',
);
 # mistake, -- and NA will be replace by 12

-substitutionvalue have to be a real number (ex : 12, .25, 02.25, 5.2e+11, etc ...)

\@data_to_display

Fill an array of arrays with the values of the data to display (\@data_to_display).

my @data_to_display = (
  [ 10, 30, 20, 30, 5, 41, 1, 23 ],
  [ 'A', 'B',    'C', 'D', 'E', 5.5,  'F', 'G', 4 ],
  [ 4,   'CPAN', 52,  6,   3,   17.5, 1,   43,  10 ]
);

If you does not want to display a value for a point, you can use undef, and the point value will be skipped.

[ 1,     undef,     5,     6,     3,     1.5,   undef,     3,     4 ]

-foreground => color,

Set color of text value.

Default : black
-font => string,

Set the font to text value.
```
-font  => 'Times 12 {bold}', 
```

redraw

Redraw the graph.

If you have used clearchart for any reason, it is possible to redraw the graph. Tk::Chart::Areas supports the configure and cget methods described in the Tk::options manpage. If you use configure method to change a widget specific option, the modification will not be display. If the graph was already displayed and if you not resize the widget, call redraw method to resolv the bug.

...
$mw->Button(
-text    => 'Change xlabel', 
-command => sub { 
    $chart->configure(-xlabel => 'red'); 
  }, 
)->pack;
...
# xlabel will be changed but not displayed if you not resize the widget.
  
...
$mw->Button(
  -text => 'Change xlabel', 
  -command => sub { 
    $chart->configure(-xlabel => 'red'); 
    $chart->redraw; 
  } 
)->pack;
...
# OK, xlabel will be changed and displayed without resize the widget.

set_balloon

$chart->set_balloon(? %Options): If you call this method, you enable help identification. When the mouse cursor passes over a plotted line or its entry in the legend, the line and its entry will be turn into a color (that you can change) to help the identification. set_legend method must be set if you want to enabled identification.

-background => string

Set a background color for the balloon.
```
-background => 'red',
```
Default : snow
-colordatamouse => Array reference

Specify an array reference wich contains 2 colors. The first color specifies the color of the line when mouse cursor passes over an entry in the legend. If the line has the same color, the second color will be used.
```
-colordatamouse => ['blue', 'green'],
```
Default : -colordatamouse => [ '#7F9010', '#CB89D3' ]
-morepixelselected => integer

When the mouse cursor passes over an entry in the legend, the line width increase.
```
-morepixelselected => 5,
```
Default : 2

set_legend

$chart->set_legend(? %Options): View a legend for the graph and allow to enabled identification help by using set_balloon method.

-title => string

Set a title legend.
```
-title => 'My title',
```
Default : undef
-titlecolors => string

Set a color to legend text.
```
-titlecolors => 'red',
```
Default : black
-titlefont => string

Set the font to legend title text.
```
-titlefont => '{Arial} 8 {normal}',
```
Default : {Times} 8 {bold}
-legendcolor => color

Color of legend text.
```
-legendcolor => 'white',
```
Default : 'black'
-legendfont => string

Set the font to legend text.
```
-legendfont => '{Arial} 8 {normal}',
```
Default : {Times} 8 {normal}
-box => boolean

Set a box around all legend.
```
-box => 1, # or 0
```
Default : 0
-legendmarkerheight => integer

Change the heigth of marker for each legend entry.
```
-legendmarkerheight => 5,
```
Default : 10
-legendmarkerwidth => integer

Change the width of marker for each legend entry.
```
-legendmarkerwidth => 5,
```
Default : 10
-heighttitle => integer

Change the height title legend space.
```
-heighttitle => 75,
```
Default : 30

zoom

$chart->zoom(integer);

Zoom the graph. The x-axis and y-axis will be zoomed. If your graph has a 300*300 size, after a zoom(200), the graph will have a 600*600 size.

$chart->zoom(50); # size divide by 2 => 150*150
...
$chart->zoom(200); # size multiplie by 2 => 600*600
...
$chart->zoom(120); # 20% add in each axis => 360*360
...
$chart->zoom(100); # original resize 300*300.

zoomx

Zoom the graph the x-axis.

# original canvas size 300*300
$chart->zoomx(50); # new size : 150*300
...
$chart->zoom(100); # new size : 300*300

zoomy

Zoom the graph the y-axis.

# original canvas size 300*300
$chart->zoomy(50); # new size : 300*150
...
$chart->zoom(100); # new size : 300*300

EXAMPLES

In the demo directory, you have a lot of script examples with their screenshot. See also the http://search.cpan.org/dist/Tk-Chart/MANIFEST web page of Tk::Chart.

AUTHOR

Djibril Ousmanou, <djibel at cpan.org>

BUGS

Please report any bugs or feature requests to bug-Tk-Chart at rt.cpan.org, or through the web interface at http://rt.cpan.org/NoAuth/ReportBug.html?Queue=Tk-Chart. I will be notified, and then you'll automatically be notified of progress on your bug as I make changes.

SUPPORT

You can find documentation for this module with the perldoc command.

perldoc Tk::Chart::Areas

You can also look for information at:

RT: CPAN's request tracker

http://rt.cpan.org/NoAuth/Bugs.html?Dist=Tk-Chart
AnnoCPAN: Annotated CPAN documentation

http://annocpan.org/dist/Tk-Chart
CPAN Ratings

http://cpanratings.perl.org/d/Tk-Chart
Search CPAN

http://search.cpan.org/dist/Tk-Chart/

ACKNOWLEDGEMENTS

COPYRIGHT & LICENSE

This program is free software; you can redistribute it and/or modify it under the same terms as Perl itself.

To install Tk::Chart, copy and paste the appropriate command in to your terminal.

cpanm

cpanm Tk::Chart

CPAN shell

perl -MCPAN -e shell
install Tk::Chart

For more information on module installation, please visit the detailed CPAN module installation guide.

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NAME

SYNOPSIS

DESCRIPTION

BACKGROUND GRADIENT COLOR

STANDARD OPTIONS

WIDGET-SPECIFIC OPTIONS

WIDGET-SPECIFIC OPTIONS for graphs with axes.

WIDGET METHODS

add_data

clearchart

delete_balloon

disabled_automatic_redraw

display_values

enabled_automatic_redraw

plot

redraw

set_balloon

set_legend

zoom

zoomx

zoomy

EXAMPLES

SEE ALSO

AUTHOR

BUGS

SUPPORT

ACKNOWLEDGEMENTS

COPYRIGHT & LICENSE

NAME

SYNOPSIS

DESCRIPTION

BACKGROUND GRADIENT COLOR

STANDARD OPTIONS

WIDGET-SPECIFIC OPTIONS

WIDGET-SPECIFIC OPTIONS for graphs with axes.

WIDGET METHODS

add_data

clearchart

delete_balloon

disabled_automatic_redraw

display_values

enabled_automatic_redraw

plot

redraw

set_balloon

set_legend

zoom

zoomx

zoomy

EXAMPLES

SEE ALSO

AUTHOR

BUGS

SUPPORT

ACKNOWLEDGEMENTS

COPYRIGHT & LICENSE

Module Install Instructions