Enhance SketchPad for easier subclass usage
- New 'new-user-sketch' signal when a local path is closed - Trap BUTTON_RELEASE_EVENTs now
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@ -15,7 +15,7 @@
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# Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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# Boston, MA 02111-1307, USA.
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import gtk
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import gtk, gobject
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from Sketch import Sketch
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@ -23,6 +23,11 @@ from SVGdraw import drawing
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from SVGdraw import svg
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class SketchPad(gtk.DrawingArea):
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__gsignals__ = {
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'new-user-sketch':(gobject.SIGNAL_RUN_FIRST, gobject.TYPE_NONE,
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([gobject.TYPE_PYOBJECT]))
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}
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def __init__(self, bgcolor=(0.6, 1, 0.4)):
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gtk.DrawingArea.__init__(self)
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@ -32,10 +37,11 @@ class SketchPad(gtk.DrawingArea):
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self._sketches = []
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self.add_events(gtk.gdk.BUTTON_PRESS_MASK |
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gtk.gdk.BUTTON_RELEASE_MASK |
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gtk.gdk.BUTTON1_MOTION_MASK)
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self.connect("button-press-event", self.__button_press_cb)
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self.connect("button-release-event", self.__button_release_cb)
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self.connect("motion-notify-event", self.__motion_notify_cb)
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self.connect("button-press-event", self._button_press_cb)
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self.connect("button-release-event", self._button_release_cb)
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self.connect("motion-notify-event", self._motion_notify_cb)
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self.connect('expose_event', self.expose)
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def clear(self):
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@ -65,23 +71,27 @@ class SketchPad(gtk.DrawingArea):
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self._rgb = color
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def add_sketch(self, sketch):
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"""Add a sketch to the the pad. Mostly for subclasses and clients."""
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self._sketches.append(sketch)
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self.window.invalidate_rect(None, False)
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def add_point(self, event):
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if self._active_sketch:
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if not self._active_sketch:
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return
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self._active_sketch.add_point(event.x, event.y)
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self.window.invalidate_rect(None, False)
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def __button_press_cb(self, widget, event):
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def _button_press_cb(self, widget, event):
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self._active_sketch = Sketch(self._rgb)
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self.add_sketch(self._active_sketch)
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self._sketches.append(self._active_sketch)
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self.add_point(event)
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def __button_release_cb(self, widget, event):
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def _button_release_cb(self, widget, event):
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self.add_point(event)
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self.emit('new-user-sketch', self._active_sketch)
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self._active_sketch = None
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def __motion_notify_cb(self, widget, event):
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def _motion_notify_cb(self, widget, event):
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self.add_point(event)
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def to_svg(self):
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