def drag_start(self, event):
if self.component:
self.original_padding = self.component.padding
if hasattr(event, "bid"):
event.window.capture_blob(self, event.bid,
event.net_transform())
else:
event.window.set_mouse_owner(self, event.net_transform())
self._last_blob_pos = (event.x, event.y)
self.mouse_down_position = (event.x,event.y)
self.event_state = "dragging"
event.handled = True
ViewportPanTool.drag_start(self, event)
return
def _viewport_default(self):
""" Trait initialiser """
vp = Viewport(component=self.diagram_canvas, enable_zoom=True)
vp.view_position = [0, 0]
vp.tools.append(ViewportPanTool(vp))
return vp
def _vp_default(self):
""" Trait initialiser.
"""
vp = Viewport(component=self.component)
vp.enable_zoom = True
vp.tools.append(ViewportPanTool(vp))
return vp
def drag_end(self, event):
event.x, event.y = self._last_blob_pos
if hasattr(event, "bid"):
event.window.release_blob(event.bid)
self.event_state = "normal"
ViewportPanTool.drag_end(self, event)
def _viewport_default(self):
""" Trait initialiser """
viewport = Viewport(component=self.canvas, enable_zoom=True)
viewport.tools.append(ViewportPanTool(viewport))
return viewport
