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#!/usr/bin/perl -w
#
# GTK - The GIMP Toolkit
# Copyright (C) 1995-1997 Peter Mattis, Spencer Kimball and Josh MacDonald
#
# Copyright (C) 2003 by the gtk2-perl team (see the file AUTHORS for the full
# list)
#
# This library is free software; you can redistribute it and/or modify it under
# the terms of the GNU Library General Public License as published by the Free
# Software Foundation; either version 2.1 of the License, or (at your option)
# any later version.
#
# This library is distributed in the hope that it will be useful, but WITHOUT
# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
# FOR A PARTICULAR PURPOSE. See the GNU Library General Public License for
# more details.
#
# You should have received a copy of the GNU Library General Public License
# along with this library; if not, write to the Free Software Foundation, Inc.,
# 59 Temple Place - Suite 330, Boston, MA 02111-1307 USA.
#
# $Header: /cvsroot/gtk2-perl/gtk2-perl-xs/Gtk2/examples/scribble.pl,v 1.10 2004/01/25 06:52:01 muppetman Exp $
#
# this was originally gtk-2.2.0/examples/scribble-simple/scribble-simple.c
# ported to gtk2-perl by muppet
use strict;
use Glib qw/TRUE FALSE/;
use Gtk2;
# Backing pixmap for drawing area
my $pixmap = undef;
# Create a new backing pixmap of the appropriate size
sub configure_event {
my $widget = shift; # GtkWidget *widget
my $event = shift; # GdkEventConfigure *event
$pixmap = Gtk2::Gdk::Pixmap->new ($widget->window,
$widget->allocation->width,
$widget->allocation->height,
-1);
$pixmap->draw_rectangle ($widget->style->white_gc,
TRUE,
0, 0,
$widget->allocation->width,
$widget->allocation->height);
return TRUE;
}
# Redraw the screen from the backing pixmap
sub expose_event {
my $widget = shift; # GtkWidget *widget
my $event = shift; # GdkEventExpose *event
$widget->window->draw_drawable (
$widget->style->fg_gc($widget->state),
$pixmap,
$event->area->x, $event->area->y,
$event->area->x, $event->area->y,
$event->area->width, $event->area->height);
return FALSE;
}
# Draw a rectangle on the screen
sub draw_brush {
my ($widget, $x, $y) = @_;
# this is not a real GdkRectangle structure; we don't actually need one.
my @update_rect;
$update_rect[0] = $x - 5;
$update_rect[1] = $y - 5;
$update_rect[2] = 10;
$update_rect[3] = 10;
$pixmap->draw_rectangle ($widget->style->black_gc,
TRUE, @update_rect);
$widget->queue_draw_area (@update_rect);
}
sub button_press_event {
my $widget = shift; # GtkWidget *widget
my $event = shift; # GdkEventButton *event
if ($event->button == 1 && defined $pixmap) {
draw_brush ($widget, $event->coords);
}
return TRUE;
}
sub motion_notify_event {
my $widget = shift; # GtkWidget *widget
my $event = shift; # GdkEventMotion *event
my ($x, $y, $state);
if ($event->is_hint) {
(undef, $x, $y, $state) = $event->window->get_pointer;
} else {
$x = $event->x;
$y = $event->y;
$state = $event->state;
}
if ($state >= "button1-mask" && defined $pixmap) {
draw_brush ($widget, $x, $y);
}
return TRUE;
}
{
Gtk2->init;
my $window = Gtk2::Window->new ('toplevel');
$window->set_name ("Test Input");
my $vbox = Gtk2::VBox->new (FALSE, 0);
$window->add ($vbox);
$vbox->show;
$window->signal_connect ("destroy", sub { exit(0); });
# Create the drawing area
my $drawing_area = Gtk2::DrawingArea->new;
$drawing_area->set_size_request (200, 200);
$vbox->pack_start ($drawing_area, TRUE, TRUE, 0);
$drawing_area->show;
# Signals used to handle backing pixmap
$drawing_area->signal_connect (expose_event => \&expose_event);
$drawing_area->signal_connect (configure_event => \&configure_event);
# Event signals
$drawing_area->signal_connect (motion_notify_event => \&motion_notify_event);
$drawing_area->signal_connect (button_press_event => \&button_press_event);
$drawing_area->set_events ([qw/exposure-mask
leave-notify-mask
button-press-mask
pointer-motion-mask
pointer-motion-hint-mask/]);
# .. And a quit button
my $button = Gtk2::Button->new ("Quit");
$vbox->pack_start ($button, FALSE, FALSE, 0);
$button->signal_connect_swapped (clicked => sub { $_[0]->destroy; }, $window);
$button->show;
$window->show;
Gtk2->main;
}
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