def group(self, parent, item):
"""
Group item within a parent.
"""
self.diagram.canvas.reparent(item, parent)
adapter = Group(parent, item)
adapter.group()
def stop_move(self):
"""Motion stops: drop!"""
super().stop_move()
item = self.item
view = self.view
canvas = view.canvas
old_parent = view.canvas.get_parent(item)
new_parent = view.dropzone_item
try:
if new_parent is old_parent:
if old_parent is not None:
old_parent.request_update(matrix=False)
return
if old_parent:
canvas.reparent(item, None)
adapter = Group(old_parent, item)
if adapter:
adapter.ungroup()
old_parent.request_update()
if new_parent:
canvas.reparent(item, new_parent)
adapter = Group(new_parent, item)
if adapter and adapter.can_contain():
adapter.group()
new_parent.request_update()
finally:
view.dropzone_item = None
def stop_move(self, pos):
"""Motion stops: drop!"""
super().stop_move(pos)
item = self.item
view = self.view
old_parent = item.parent
new_parent = view.selection.dropzone_item
try:
if new_parent is old_parent:
if old_parent is not None:
old_parent.request_update(matrix=False)
return
if old_parent:
item.parent = None
adapter = Group(old_parent, item)
if adapter:
adapter.ungroup()
old_parent.request_update()
if new_parent:
item.parent = new_parent
adapter = Group(new_parent, item)
if adapter and adapter.can_contain():
adapter.group()
new_parent.request_update()
finally:
view.selection.dropzone_item = None
def item_factory(diagram, parent=None):
if subject_class:
element_factory = diagram.model
subject = element_factory.create(subject_class)
else:
subject = None
item = diagram.create(item_class, subject=subject)
if config_func:
config_func(item)
adapter = Group(parent, item)
if parent and adapter.can_contain():
adapter.group()
diagram.canvas.reparent(item, parent=parent)
return item
def stop_move(self):
"""
Motion stops: drop!
"""
super(DropZoneInMotion, self).stop_move()
item = self.item
view = self.view
canvas = view.canvas
old_parent = view.canvas.get_parent(item)
new_parent = view.dropzone_item
try:
if new_parent is old_parent:
if old_parent is not None:
old_parent.request_update(matrix=False)
return
if old_parent:
adapter = Group(old_parent, item)
if adapter:
adapter.ungroup()
canvas.reparent(item, None)
m = canvas.get_matrix_i2c(old_parent)
item.matrix *= m
old_parent.request_update()
if new_parent:
adapter = Group(new_parent, item)
if adapter and adapter.can_contain():
adapter.group()
canvas.reparent(item, new_parent)
m = canvas.get_matrix_c2i(new_parent)
item.matrix *= m
new_parent.request_update()
finally:
view.dropzone_item = None
view.get_window().set_cursor(None)
def _create_item(self, pos):
"""
Create diagram item and place it within parent's boundaries.
"""
parent = self._parent
view = self.view
try:
adapter = Group(parent, self._factory.item_class())
if parent and adapter and adapter.can_contain():
item = super()._create_item(pos, parent=parent)
else:
item = super()._create_item(pos)
adapter = Group(parent, item)
if parent and item and adapter:
adapter.group()
parent.request_update(matrix=False)
finally:
self._parent = None
view.dropzone_item = None
view.get_window().set_cursor(None)
return item
def _create_item(self, pos, **kw):
"""
Create diagram item and place it within parent's boundaries.
"""
parent = self._parent
view = self.view
try:
adapter = Group(parent, self._factory.item_class())
if parent and adapter and adapter.can_contain():
kw["parent"] = parent
item = super(GroupPlacementTool, self)._create_item(pos, **kw)
adapter = Group(parent, item)
if parent and item and adapter:
adapter.group()
canvas = view.canvas
parent.request_update(matrix=False)
finally:
self._parent = None
view.dropzone_item = None
view.window.set_cursor(None)
return item
def group(self, parent, item):
"""Group item within a parent."""
item.parent = parent
adapter = Group(parent, item)
adapter.group()