def get_action_for_key(action_contexts: typing.Sequence[str], key: UserInterface.Key) -> typing.Optional[Action]:
for action_context in reversed(action_contexts):
for action_id, action_shortcut_d in action_shortcuts.items():
for key_action_context, key_sequence_str in action_shortcut_d.items():
if action_context == key_action_context:
if isinstance(key_sequence_str, list):
key_sequences = [UserInterface.KeySequence(kss) for kss in key_sequence_str]
else:
key_sequences = [UserInterface.KeySequence(key_sequence_str)]
for key_sequence in key_sequences:
if key_sequence.matches(key) == UserInterface.KeySequenceMatch.EXACT:
return actions[action_id]
return None
def decode_font_metrics(self, font_metrics):
from nion.ui import UserInterface
return UserInterface.FontMetrics(width=font_metrics[0],
height=font_metrics[1],
ascent=font_metrics[2],
descent=font_metrics[3],
leading=font_metrics[4])
def add_action_to_menu(
self, menu: UserInterface.Menu, action_id: str,
action_context: ActionContext) -> typing.Optional[Action]:
action = actions.get(action_id)
if action:
key_sequence = action_shortcuts.get(action_id,
dict()).get("window")
assert menu is not None
def perform_action() -> None:
self.perform_action_in_context(action_id, action_context)
def queue_perform_action() -> None:
# delay execution to ensure menu closes properly
# this would manifest itself by export dialog crashes in nionswift.
self.queue_task(perform_action)
menu_action = menu.add_menu_item(action.action_name,
queue_perform_action,
key_sequence=key_sequence,
action_id=action_id)
title = action.get_action_name(action_context)
enabled = action and action.is_enabled(action_context)
checked = action and action.is_checked(action_context)
menu_action.apply_state(
UserInterface.MenuItemState(title=title,
enabled=enabled,
checked=checked))
return action
def _apply_menu_state(self, action_id: str, action_context: ActionContext) -> None:
menu_action = self.__document_window.get_menu_action(action_id)
if menu_action and menu_action.action_id:
action = actions.get(menu_action.action_id)
if action:
title = action.get_action_name(action_context)
enabled = action and action.is_enabled(action_context)
checked = action and action.is_checked(action_context)
menu_action.apply_state(UserInterface.MenuItemState(title=title, enabled=enabled, checked=checked))
def _get_menu_item_state(self, command_id: str) -> typing.Optional[UserInterface.MenuItemState]:
# if there is a specific menu item state for the command_id, use it
# otherwise, if the handle method exists, return an enabled menu item
# otherwise, don't handle
handle_method = "handle_" + command_id
menu_item_state_method = "get_" + command_id + "_menu_item_state"
if hasattr(self, menu_item_state_method):
menu_item_state = getattr(self, menu_item_state_method)()
if menu_item_state:
return typing.cast(UserInterface.MenuItemState, menu_item_state)
if hasattr(self, handle_method):
return UserInterface.MenuItemState(title=None, enabled=True, checked=False)
return None
def _menu_about_to_show(self, menu: UserInterface.Menu) -> None:
if self.app and self.app._menu_about_to_show(self, menu):
pass
elif menu.menu_id == "file":
self._file_menu_about_to_show()
elif menu.menu_id == "edit":
self._edit_menu_about_to_show()
elif menu.menu_id == "window":
self._window_menu_about_to_show()
# perform enable/disable/title for all menus
action_context = self._get_action_context()
for menu_action in menu.get_menu_actions():
if menu_action.action_id:
action = actions.get(menu_action.action_id)
if action:
title = action.get_action_name(action_context)
enabled = action and action.is_enabled(action_context)
checked = action and action.is_checked(action_context)
menu_action.apply_state(UserInterface.MenuItemState(title=title, enabled=enabled, checked=checked))
def test_get_font_metrics_sanity_check(self) -> None:
# Test that TestUI.UserInterface.get_font_metrics returns a reasonable size
# This test will need to be updated if 'make_font_metrics_for_tests' is modified
self.assertEqual(
self.ui.get_font_metrics("ignored", "This is a string"),
UserInterfaceModule.FontMetrics(77, 13, 11, 2, 0))
