def on_button_press(self, event):
"""Handle button press events.
If the (mouse) button is pressed on top of a Handle (item.Handle), that handle is grabbed and can be
dragged around.
"""
if not event.get_button()[1] == 1: # left mouse button
return False
view = self.view
item, handle = HandleFinder(view.hovered_item,
view).get_handle_at_point(
(event.x, event.y))
# Handle must be the end handle of a connection
if not handle or not isinstance(
item, ConnectionView) or handle not in item.end_handles():
return False
if handle is item.from_handle():
self._start_port_v = item.from_port
else:
self._start_port_v = item.to_port
self._parent_state_v = item.parent
self._end_handle = handle
if isinstance(item, TransitionView):
self._is_transition = True
self._connection_v = item
return True
def on_button_press(self, event):
"""Handle button press events.
If the (mouse) button is pressed on top of a Handle (item.Handle), that handle is grabbed and can be
dragged around.
"""
if not event.get_button()[1] == 1: # left mouse button
return False
view = self.view
if isinstance(view.hovered_item, StateView):
distance = view.hovered_item.border_width / 2.
item, handle = HandleFinder(view.hovered_item,
view).get_handle_at_point(
(event.x, event.y), distance)
else:
item, handle = HandleFinder(view.hovered_item,
view).get_handle_at_point(
(event.x, event.y))
if not handle:
return False
# Only move ports when the MOVE_PORT_MODIFIER key is pressed
if isinstance(item, (StateView, PortView)) and \
handle in [port.handle for port in item.get_all_ports()] and \
not (event.get_state()[1] & constants.MOVE_PORT_MODIFIER):
return False
# Do not move from/to handles of connections (only their waypoints)
if isinstance(item, ConnectionView) and handle in item.end_handles(
include_waypoints=True):
return False
if handle:
view.hovered_item = item
self.motion_handle = None
self.grab_handle(item, handle)
return True