table of contents
GooCanvas2(3) | User Contributed Perl Documentation | GooCanvas2(3) |
NAME¶
GooCanvas2 - Perl binding for GooCanvas2 widget using Glib::Object::Introspection
SYNOPSIS¶
#!/usr/bin/perl -w use strict; use warnings; use Gtk3 -init; use GooCanvas2; my $window = Gtk3::Window->new(); $window->set_default_size(640, 600); $window->signal_connect('destroy' => sub {Gtk3->main_quit()}); my $scrolled_win = Gtk3::ScrolledWindow->new(); $scrolled_win->set_shadow_type('in'); my $canvas = GooCanvas2::Canvas->new(); $canvas->set_size_request(600,450); $canvas->set_bounds(0,0,1000,1000); $scrolled_win->add($canvas); my $root = $canvas->get_root_item(); # Add a few simple items my $rect_item = GooCanvas2::CanvasRect->new('parent' => $root, 'x' => 100, 'y' => 100, 'width' => 300, 'height' => 300, 'line_width' => 10.0, 'radius-x' => 20.0, 'radius-y' => 10.0, 'stroke-color' => 'yellow', 'fill-color' => 'red'); my $text_item = GooCanvas2::CanvasText->new('parent' => $root, 'text' => 'Hello World', 'x' => 300, 'y' => 300, 'width' => -1, 'anchor' => 'center', 'font' => 'Sans 24'); $text_item->rotate(45, 300, 300); # Connect a signal handler for the rectangle item. $rect_item->signal_connect('button_press_event' => \&on_rect_button_press); $window->add($scrolled_win); $window->show_all; # Pass control to the Gtk3 main event loop Gtk3->main(); # This handles button presses in item views. #We simply output a message to the console sub on_rect_button_press { my ($item, $target, $event) = @_; print "rect item received button press event \n"; return 1; }
INSTALLATION¶
You need to install the typelib file for GooCanvas-2.0. For example on Debian/Ubuntu it should be necessary to install the following package:
sudo apt-get install gir1.2-goocanvas-2.0
On Mageia for example you have to install:
urpmi lib64goocanvas-gir2.0
DESCRIPTION¶
GooCanvas2 is a new canvas widget for use with Gtk3 that uses the Cairo 2d library for drawing. This is a simple and basic implementation of this wonderful Canvas widget.
For more informations see <https://wiki.gnome.org/action/show/Projects/GooCanvas>
For instructions, how to use GooCanvas2, please study the API reference at <https://developer.gnome.org/goocanvas/unstable/> for now. A perl-specific documentation will perhaps come in later versions. But applying the C documentation should be no problem.
OBJECTS, ITEMS, MODELS¶
The GooCanvas2 module provides the following objects, items and models. For more details see <https://wiki.gnome.org/action/show/Projects/GooCanvas>.
Core Objects
- GooCanvas2::Canvas - the main canvas widget
- GooCanvas2::CanvasItem - the interface for canvas items
- GooCanvas2::CanvasItemModel - the interface for canvas item models.
- GooCanvas2::CanvasItemSimple - the base class for the standard canvas items.
- GooCanvas2::CanvasItemModelSimple - the base class for the standard canvas item models.
- GooCanvas2::CanvasStyle - support for cascading style properties for canvas items.
Standard Canvas Items
- GooCanvas2::CanvasGroup - a group of items.
- GooCanvas2::CanvasEllipse - an ellipse item.
- GooCanvas2::CanvasGrid - a grid item.
- GooCanvas2::CanvasImage - an image item.
- GooCanvas2::CanvasPath - a path item (a series of lines and curves).
- GooCanvas2::CanvasPolyline - a polyline item (a series of lines with optional arrows).
- GooCanvas2::CanvasRect - a rectangle item.
- GooCanvas2::CanvasText - a text item.
- GooCanvas2::CanvasWidget - an embedded widget item.
- GooCanvas2::CanvasTable - a table container to layout items.
Standard Canvas Item Models
- GooCanvas2::CanvasGroupModel - a model for a group of items.
- GooCanvas2::CanvasEllipseModel - a model for ellipse items.
- GooCanvas2::CanvasGridModel - a model for grid items.
- GooCanvas2::CanvasImageModel - a model for image items.
- GooCanvas2::CanvasPathModel - a model for path items (a series of lines and curves).
- GooCanvas2::CanvasPolylineModel - a model for polyline items (a series of lines with optional arrows).
- GooCanvas2::CanvasRectModel - a model for rectangle items.
- GooCanvas2::CanvasTextModel - a model for text items.
- GooCanvas2::CanvasTableModel - a model for a table container to layout items.
Development status and informations¶
Customizations and overrides
In order to make things more Perlish, GooCanvas2 customizes the API generated by Glib::Object::Introspection in a few spots:
- •
- The array ref normally returned by the following functions is flattened into a list:
SEE ALSO¶
- GooCanvas Homepage at <https://wiki.gnome.org/action/show/Projects/GooCanvas>
- GooCanvas2 API Reference <https://developer.gnome.org/goocanvas/unstable/>
- Gtk3
- Glib::Object::Introspection
AUTHOR¶
Maximilian Lika, <Maximilian-Lika@gmx.de>
COPYRIGHT AND LICENSE¶
Copyright (C) 2017 by Maximilian Lika
This library is free software; you can redistribute it and/or modify it under the same terms as Perl itself, either Perl version 5.22.3 or, at your option, any later version of Perl 5 you may have available.
2019-01-07 | perl v5.40.0 |