Tk::GraphItems - Display relation-graphs on a Tk::Canvas

Tk-GraphItems documentation Contained in the Tk-GraphItems distribution.

Index

Code Index:

NAME

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Tk::GraphItems - Display relation-graphs on a Tk::Canvas

DESCRIPTION

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Tk::GraphItems provides objects TextBox, Circle and Connector to display nodes and edges of given relation-graph models on a Tk::Canvas widget. Tk::GraphItems contain a dependency mechanism to ensure, that edges are updated on changes of position or size of their source- and target-nodes. Edges have view-properties like colour, width, direction(arrows). Nodes support (bg)colour and text (can be multiline). Nodes can be moved and placed programmatically or with drag/drop. To make integration into existing graph-implementations easier, Tk::GraphItems contains a simple tie-module to tie the nodes coords- getter-/setter - methods to given Variables in the underlying model. Bindings to Tk-Events can be set so it's easy to implement e.g. context-menus for the objects.

METHODS

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Tk::GraphItems supports the following methods:

TextBox( canvas=>$can, text=>"new_node", x =>50, y =>50 )

Create a new Tk::GraphItems::TextBox instance and display it on the Canvas.

Circle( canvas => $can, colour => $a_TkColor, size => $size_pixels, x => 50, y => 50 )

Create a new Tk::GraphItems::Circle instance and display it on the Canvas.

Connector( source=> $source_node, target=> $target_node )

Create a new Tk::GraphItems::Connector instance.

SEE ALSO

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Documentation of Tk::GraphItems::TextBox, Tk::GraphItems::Connector and Tk::GraphItems::Circle.

Examples

Examples can be found in Tk/GraphItems/Examples/

gi_easy.pl

Demonstrates how to set up mouse bindings to create nodes and edges. Adds a context menu binding to nodes.

create_and_autolayout.pl

Create a 'Graph' object by clicking/dragging and watch Graph::Layout::Aesthetic arranging the nodes.

AUTHOR

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Christoph Lamprecht, ch.l.ngre@online.de

COPYRIGHT AND LICENSE

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Copyright (C) 2007 by Christoph Lamprecht

This library is free software; you can redistribute it and/or modify it under the same terms as Perl itself, either Perl version 5.8.7 or, at your option, any later version of Perl 5 you may have available.

Tk-GraphItems documentation Contained in the Tk-GraphItems distribution. 
#!/usr/bin/perl




use warnings;
use strict;
package Tk::GraphItems;
our $VERSION = '0.12';
require Tk::GraphItems::TextBox;
require Tk::GraphItems::Circle;
require Tk::GraphItems::Connector;
require Tk::GraphItems::LabeledConnector;

sub TextBox{
    if ($_[0]){
        shift;
        return 'Tk::GraphItems::TextBox'->new(@_);
    }
    return 'Tk::GraphItems::TextBox';
}

sub Connector{
    if ($_[0]){
        shift;
        return 'Tk::GraphItems::Connector'->new(@_);
    }
    return 'Tk::GraphItems::Connector';
}
sub Circle{
    if ($_[0]){
        shift;
        return 'Tk::GraphItems::Circle'->new(@_);
    }
    return 'Tk::GraphItems::Circle';
}
sub LabeledConnector{
    if ($_[0]){
        shift;
        return 'Tk::GraphItems::LabeledConnector'->new(@_);
    }
    return 'Tk::GraphItems::LabeledConnector';
}
1;