def test_random_filtered_model_updates(self): list_model = ListModel.ListModel("data_items") filtered_data_items = ListModel.FilteredListModel(items_key="data_items") filtered_data_items.container = list_model data_items = list() cc = 30 for _ in range(cc): data_item = DataItem.DataItem(numpy.zeros((16, 16), numpy.uint32)) list_model.insert_item(0, data_item) data_items.append(data_item) selection = Selection.IndexedSelection() filtered_data_items2 = ListModel.FilteredListModel(items_key="data_items", container=filtered_data_items, selection=selection) import random for xx in range(10): c1 = [n for n in range(cc)] c2 = [n for n in range(cc) if random.randint(0,100) > 20] random.shuffle(c1) random.shuffle(c2) def is_live_filter(data_item): return data_items.index(data_item) in c1 def is_live_filter2(data_item): return data_items.index(data_item) in c2 filtered_data_items.sort_key = lambda x: data_items.index(x) with filtered_data_items.changes(): filtered_data_items.filter = ListModel.PredicateFilter(is_live_filter) filtered_data_items.filter = ListModel.PredicateFilter(is_live_filter2) self.assertEqual(set(c2), set([data_items.index(d) for d in filtered_data_items2.items])) for data_item in data_items: data_item.close()
def slow_test_threaded_filtered_model_updates(self): for _ in range(1000): list_model = ListModel.ListModel("data_items") filtered_data_items = ListModel.FilteredListModel(items_key="data_items") data_items = list() cc = 30 for _ in range(cc): data_item = DataItem.DataItem(numpy.zeros((16, 16), numpy.uint32)) data_items.append(data_item) c1 = [n for n in range(cc) if random.randint(0,100) > 50] def is_live_filter(data_item): return data_items.index(data_item) in c1 filtered_data_items.container = list_model filtered_data_items.sort_key = lambda x: data_items.index(x) selection = Selection.IndexedSelection() filtered_data_items2 = ListModel.FilteredListModel(items_key="data_items", container=filtered_data_items, selection=selection) filtered_data_items2.filter = ListModel.PredicateFilter(is_live_filter) finished = threading.Event() def update_randomly(): for _ in range(cc): data_item = random.choice(filtered_data_items._get_master_items()) data_item.data_item_changed_event.fire() finished.set() list_model.insert_item(0, data_items[0]) threading.Thread(target = update_randomly).start() for index in range(1, cc): list_model.insert_item(index, data_items[index]) finished.wait() filtered_data_items2.close() filtered_data_items.close()
def project_filter(self) -> ListModel.Filter: def is_display_item_active( project_weak_ref, display_item: DisplayItem.DisplayItem) -> bool: return display_item.project == project_weak_ref() # use a weak reference to avoid circular references loops that prevent garbage collection return ListModel.PredicateFilter( functools.partial(is_display_item_active, weakref.ref(self)))
def test_filtered_list_changing_from_sorted_to_unsorted_retains_order(self): l = ListModel.ListModel("items") l.append_item("3") l.append_item("1") l.append_item("4") l.append_item("2") l2 = ListModel.FilteredListModel(container=l, items_key="items") l2.sort_key = lambda x: x self.assertEqual(["1", "2", "3", "4"], l2.items) l2.filter = ListModel.PredicateFilter(lambda x: x != "4") l2.sort_key = None self.assertEqual(["3", "1", "2"], l2.items) l.remove_item(1) self.assertEqual(["3", "2"], l2.items)
def test_filtered_list_updates_filtered_selection(self) -> None: l = ListModel.ListModel[typing.Any]("items") l.append_item("A1") l.append_item("B1") l.append_item("A2") l.append_item("B2") l.append_item("A3") l.append_item("B3") l2 = ListModel.FilteredListModel(container=l, items_key="items") s = l2.make_selection() s.set_multiple({0, 1, 2, 3}) l2.filter = ListModel.PredicateFilter( lambda x: bool(x.startswith("A"))) s.set_multiple({0, 1, 2}) l.remove_item(1) # B self.assertEqual({0, 1, 2}, s.indexes) l.remove_item(0) # A self.assertEqual({0, 1}, s.indexes)
def test_filtered_list_unsorted_retains_order(self): l = ListModel.ListModel("items") l.append_item("3") l.append_item("1") l.append_item("4") l.append_item("2") l2 = ListModel.FilteredListModel(container=l, items_key="items") l2.filter = ListModel.PredicateFilter(lambda x: x != "4") self.assertEqual(["3", "1", "2"], l2.items) l.remove_item(0) self.assertEqual(["1", "2"], l2.items) l.insert_item(0, "3") l.append_item("44") self.assertEqual(["3", "1", "2", "44"], l2.items) l2.begin_change() l.insert_item(0, "5") l.append_item("6") l2.end_change() self.assertEqual(["5", "3", "1", "2", "44", "6"], l2.items)
def show_choose_project_dialog(self) -> None: with self.prevent_close(): u = Declarative.DeclarativeUI() button_row = u.create_row( u.create_push_button(text=_("New..."), on_clicked="new_project"), u.create_push_button(text=_("Open..."), on_clicked="open_project"), u.create_stretch(), u.create_push_button(text=_("Cancel"), on_clicked="close_window"), u.create_push_button(text=_("Open Recent"), on_clicked="open_recent"), spacing=8) project_references_model = ListModel.FilteredListModel( container=self.__profile, items_key="project_references") project_references_model.filter = ListModel.PredicateFilter( lambda pr: pr.project_state != "loaded") project_references_model.sort_key = lambda pr: pr.last_used project_references_model.sort_reverse = True class ProjectReferenceItem: # provides a str converter and a tool tip. def __init__(self, project_reference: Profile.ProjectReference): self.project_reference = project_reference def __str__(self) -> str: project_reference = self.project_reference project_title = project_reference.title if project_reference.project_state == "needs_upgrade": project_title += " " + _("(NEEDS UPGRADE)") elif project_reference.project_state != "unloaded" or project_reference.project_version != FileStorageSystem.PROJECT_VERSION: project_title += " " + _("(MISSING OR UNREADABLE)") return project_title @property def tool_tip(self) -> str: return str(self.project_reference.path) project_reference_items_model = ListModel.MappedListModel( container=project_references_model, master_items_key="project_references", items_key="project_reference_items", map_fn=ProjectReferenceItem) item_list = u.create_list_box( items_ref="@binding(list_property_model.value)", current_index="@binding(current_index)", height=240, min_height=180, size_policy_horizontal="expanding", on_item_selected="recent_item_selected", on_item_handle_context_menu="item_handle_context_menu") main_column = u.create_column( u.create_label(text=_("Recent Projects")), item_list, u.create_spacing(13), button_row, spacing=8, width=380) window = u.create_window(main_column, title=_("Choose Project"), margin=12, window_style="tool") def open_project_reference( project_reference: Profile.ProjectReference) -> None: self.open_project_reference(project_reference) def show_open_project_dialog() -> None: self.show_open_project_dialog() def show_new_project_dialog() -> None: NewProjectAction().invoke( UIWindow.ActionContext(self, None, None)) from nion.utils import Observable class ListPropertyModel(Observable.Observable): # copied from nionutils to avoid requiring new version. # remove this code once nionutils 0.3.24+ is released. def __init__(self, list_model): super().__init__() self.__list_model = list_model self.__item_inserted_event_listener = list_model.item_inserted_event.listen( self.__item_inserted) self.__item_removed_event_listener = list_model.item_removed_event.listen( self.__item_removed) def close(self) -> None: self.__list_model = None self.__item_inserted_event_listener = None self.__item_removed_event_listener = None def __item_inserted(self, key: str, item, before_index: int) -> None: self.notify_property_changed("value") def __item_removed(self, key: str, item, index: int) -> None: self.notify_property_changed("value") @property def value(self): return self.__list_model.items class ChooseProjectHandler(Declarative.WindowHandler): def __init__(self, application: Application): super().__init__() self.__application = application self.current_index = 0 self.list_property_model = ListPropertyModel( project_reference_items_model) def recent_item_selected(self, widget: Declarative.UIWidget, current_index: int) -> None: if 0 <= current_index < len(project_reference_items_model. project_reference_items): # to ensure the application does not close upon closing the last window, force it # to stay open while the window is closed and another reopened. with self.__application.prevent_close(): self.close_window() project_reference_item = project_reference_items_model.project_reference_items[ current_index] open_project_reference( project_reference_item.project_reference) def new_project(self, widget: Declarative.UIWidget) -> None: # to ensure the application does not close upon closing the last window, force it # to stay open while the window is closed and another reopened. with self.__application.prevent_close(): show_new_project_dialog() self.close_window() def open_project(self, widget: Declarative.UIWidget) -> None: # to ensure the application does not close upon closing the last window, force it # to stay open while the window is closed and another reopened. with self.__application.prevent_close(): show_open_project_dialog() self.close_window() def open_recent(self, widget: Declarative.UIWidget) -> None: self.recent_item_selected(widget, self.current_index) def item_handle_context_menu(self, widget: Declarative.UIWidget, *, gx: int, gy: int, index: typing.Optional[int], **kwargs) -> bool: if index is not None: project_reference_item = project_reference_items_model.project_reference_items[ index] menu = self.window.create_context_menu() menu.add_menu_item( _(f"Open Project Location"), functools.partial( ProjectPanel.reveal_project, project_reference_item.project_reference)) menu.add_separator() def remove_project(index: int) -> None: project_reference_item = project_reference_items_model.project_reference_items[ index] self.__application.profile.remove_project_reference( project_reference_item.project_reference) menu.add_menu_item( _(f"Remove Project from List"), functools.partial(remove_project, index)) menu.popup(gx, gy) return True ChooseProjectHandler(self).run(window, app=self)