diff options
Diffstat (limited to 'grc/src/gui/DrawingArea.py')
| -rw-r--r-- | grc/src/gui/DrawingArea.py | 20 |
1 files changed, 12 insertions, 8 deletions
diff --git a/grc/src/gui/DrawingArea.py b/grc/src/gui/DrawingArea.py index 5258979d82..feb4019780 100644 --- a/grc/src/gui/DrawingArea.py +++ b/grc/src/gui/DrawingArea.py @@ -40,11 +40,12 @@ class DrawingArea(gtk.DrawingArea): self._main_window.drawing_area = self gtk.DrawingArea.__init__(self) self.set_size_request(MIN_WINDOW_WIDTH, MIN_WINDOW_HEIGHT) + self.connect('configure-event', self._handle_window_configure) self.connect('expose-event', self._handle_window_expose) self.connect('motion-notify-event', self._handle_mouse_motion) self.connect('button-press-event', self._handle_mouse_button_press) self.connect('button-release-event', self._handle_mouse_button_release) - self.set_events( + self.add_events( gtk.gdk.BUTTON_PRESS_MASK | \ gtk.gdk.POINTER_MOTION_MASK | \ gtk.gdk.BUTTON_RELEASE_MASK | \ @@ -59,8 +60,6 @@ class DrawingArea(gtk.DrawingArea): self.get_focus_flag = lambda: self._focus_flag self.connect('leave-notify-event', self._handle_focus_event, False) self.connect('enter-notify-event', self._handle_focus_event, True) - #pixmap for drawing - self.pixmap = None ########################################################################## ## Handlers @@ -105,14 +104,19 @@ class DrawingArea(gtk.DrawingArea): coordinate=(event.x, event.y), ) + def _handle_window_configure(self, widget, event): + """ + Called when the window is resized. + Create a new pixmap for background buffer. + """ + width, height = self.get_size_request() + self.pixmap = gtk.gdk.Pixmap(self.window, width, height, -1) + def _handle_window_expose(self, widget, event): """ - Called when window is exposed, resized, or queue_draw is called. + Called when window is exposed, or queue_draw is called. + Double buffering: draw to pixmap, then draw pixmap to window. """ gc = self.window.new_gc() - width, height = self.get_size_request() - if not self.pixmap or (width, height) != self.pixmap.get_size(): - self.pixmap = gtk.gdk.Pixmap(self.window, width, height, -1) - #double buffering: draw to pixmap, then draw pixmap self._main_window.get_flow_graph().draw(gc, self.pixmap) self.window.draw_drawable(gc, self.pixmap, 0, 0, 0, 0, -1, -1) |