import gtk from Sketch import Sketch from SVGdraw import drawing from SVGdraw import svg class SketchPad(gtk.DrawingArea): def __init__(self): gtk.DrawingArea.__init__(self) self._active_sketch = None self._rgb = (0.0, 0.0, 0.0) self._sketches = [] self.add_events(gtk.gdk.BUTTON_PRESS_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(0.6, 1, 0.4) 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): self._sketches.append(sketch) def add_point(self, event): if self._active_sketch: 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.add_sketch(self._active_sketch) self.add_point(event) def __button_release_cb(self, widget, event): self.add_point(event) 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()