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# Copyright (C) 2006, Red Hat, Inc.
#
# This library is free software; you can redistribute it and/or
# modify it under the terms of the GNU Lesser 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
# Lesser General Public License for more details.
#
# You should have received a copy of the GNU Lesser 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.
import gtk, gobject
from Sketch import Sketch
from SVGdraw import drawing
from SVGdraw import svg
class SketchPad(gtk.DrawingArea):
__gsignals__ = {
'new-user-sketch':(gobject.SIGNAL_RUN_FIRST, gobject.TYPE_NONE,
([gobject.TYPE_PYOBJECT]))
}
def __init__(self, bgcolor=(0.6, 1, 0.4)):
gtk.DrawingArea.__init__(self)
self._active_sketch = None
self._rgb = (0.0, 0.0, 0.0)
self._bgcolor = bgcolor
self._sketches = []
self.add_events(gtk.gdk.BUTTON_PRESS_MASK |
gtk.gdk.BUTTON_RELEASE_MASK |
gtk.gdk.BUTTON1_MOTION_MASK)
self.connect("button-press-event", self._button_press_cb)
self.connect("button-release-event", self._button_release_cb)
self.connect("motion-notify-event", self._motion_notify_cb)
self.connect('expose_event', self.expose)
def clear(self):
self._sketches = []
self.window.invalidate_rect(None, False)
def expose(self, widget, event):
"""Draw the background of the sketchpad."""
rect = self.get_allocation()
ctx = widget.window.cairo_create()
ctx.set_source_rgb(self._bgcolor[0], self._bgcolor[1], self._bgcolor[2])
ctx.rectangle(0, 0, rect.width, rect.height)
ctx.fill_preserve()
ctx.set_source_rgb(0, 0.3, 0.2)
ctx.stroke()
for sketch in self._sketches:
sketch.draw(ctx)
return False
def set_color(self, color):
"""Sets the current drawing color of the sketchpad.
color agument should be 3-item tuple of rgb values between 0 and 1."""
self._rgb = color
def add_sketch(self, sketch):
"""Add a sketch to the the pad. Mostly for subclasses and clients."""
self._sketches.append(sketch)
self.window.invalidate_rect(None, False)
def add_point(self, event):
if not self._active_sketch:
return
self._active_sketch.add_point(event.x, event.y)
self.window.invalidate_rect(None, False)
def _button_press_cb(self, widget, event):
self._active_sketch = Sketch(self._rgb)
self._sketches.append(self._active_sketch)
self.add_point(event)
def _button_release_cb(self, widget, event):
self.add_point(event)
self.emit('new-user-sketch', self._active_sketch)
self._active_sketch = None
def _motion_notify_cb(self, widget, event):
self.add_point(event)
def to_svg(self):
"""Return a string containing an SVG representation of this sketch."""
d = drawing()
s = svg()
for sketch in self._sketches:
s.addElement(sketch.draw_to_svg())
d.setSVG(s)
return d.toXml()
def test_quit(w, skpad):
print skpad.to_svg()
gtk.main_quit()
if __name__ == "__main__":
window = gtk.Window()
window.set_default_size(400, 300)
window.connect("destroy", lambda w: gtk.main_quit())
sketchpad = SketchPad()
window.add(sketchpad)
sketchpad.show()
window.show()
window.connect("destroy", test_quit, sketchpad)
gtk.main()
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