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Diffstat (limited to 'scribble.py')
| -rw-r--r-- | scribble.py | 123 |
1 files changed, 123 insertions, 0 deletions
diff --git a/scribble.py b/scribble.py new file mode 100644 index 0000000..3b36111 --- /dev/null +++ b/scribble.py @@ -0,0 +1,123 @@ +#!/usr/bin/env python + +# example scribblesimple.py + + # GTK - The GIMP Toolkit + # Copyright (C) 1995-1997 Peter Mattis, Spencer Kimball and Josh MacDonald + # Copyright (C) 2001-2004 John Finlay + # + # 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 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. +# +# [SNIPPET_NAME: Scribble Simple] +# [SNIPPET_CATEGORIES: PyGTK] +# [SNIPPET_DESCRIPTION: A simple scribbling example] + +import pygtk +pygtk.require('2.0') +import gtk + +# Backing pixmap for drawing area +pixmap = None + +# Create a new backing pixmap of the appropriate size +def configure_event(widget, event): + global pixmap + + x, y, width, height = widget.get_allocation() + pixmap = gtk.gdk.Pixmap(widget.window, width, height) + pixmap.draw_rectangle(widget.get_style().white_gc, + True, 0, 0, width, height) + + return True + +# Redraw the screen from the backing pixmap +def expose_event(widget, event): + x , y, width, height = event.area + widget.window.draw_drawable(widget.get_style().fg_gc[gtk.STATE_NORMAL], + pixmap, x, y, x, y, width, height) + return False + +# Draw a rectangle on the screen +def draw_brush(widget, x, y): + rect = (int(x-5), int(y-5), 10, 10) + pixmap.draw_rectangle(widget.get_style().black_gc, True, + rect[0], rect[1], rect[2], rect[3]) + widget.queue_draw_area(rect[0], rect[1], rect[2], rect[3]) + +def button_press_event(widget, event): + if event.button == 1 and pixmap != None: + draw_brush(widget, event.x, event.y) + return True + +def motion_notify_event(widget, event): + if event.is_hint: + x, y, state = event.window.get_pointer() + else: + x = event.x + y = event.y + state = event.state + + if state & gtk.gdk.BUTTON1_MASK and pixmap != None: + draw_brush(widget, x, y) + + return True + +def main(): + window = gtk.Window(gtk.WINDOW_TOPLEVEL) + window.set_name ("Test Input") + + vbox = gtk.VBox(False, 0) + window.add(vbox) + vbox.show() + + window.connect("destroy", lambda w: gtk.main_quit()) + + # Create the drawing area + drawing_area = gtk.DrawingArea() + 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.connect("expose_event", expose_event) + drawing_area.connect("configure_event", configure_event) + + # Event signals + drawing_area.connect("motion_notify_event", motion_notify_event) + drawing_area.connect("button_press_event", button_press_event) + + drawing_area.set_events(gtk.gdk.EXPOSURE_MASK + | gtk.gdk.LEAVE_NOTIFY_MASK + | gtk.gdk.BUTTON_PRESS_MASK + | gtk.gdk.POINTER_MOTION_MASK + | gtk.gdk.POINTER_MOTION_HINT_MASK) + + # .. And a quit button + button = gtk.Button("Quit") + vbox.pack_start(button, False, False, 0) + + button.connect_object("clicked", lambda w: w.destroy(), window) + button.show() + + window.show() + + gtk.main() + + return 0 + +if __name__ == "__main__": + main() |