Struct zng_ext_input::focus::FocusManager

pub struct FocusManager { /* private fields */ }

Application extension that manages keyboard focus.

Events

Events this extension provides.

• FOCUS_CHANGED_EVENT
• RETURN_FOCUS_CHANGED_EVENT

Services

Services this extension provides.

• FOCUS

Dependencies

This extension requires the WINDOWS service.

This extension listens to the MOUSE_INPUT_EVENT, TOUCH_INPUT_EVENT, SHORTCUT_EVENT, WINDOW_FOCUS_CHANGED_EVENT and WIDGET_INFO_CHANGED_EVENT.

To work properly it should be added to the app after the windows manager extension.

About Focus

See the module level documentation for an overview of the keyboard focus concepts implemented by this app extension.

Trait Implementations

impl AppExtension for FocusManager

fn init(&mut self)

Initializes this extension.

fn event_preview(&mut self, update: &mut EventUpdate)

Called just before event_ui when an event notifies.

fn render(&mut self, _: &mut RenderUpdates, _: &mut RenderUpdates)

Called when render is requested for windows and widgets.

fn event(&mut self, update: &mut EventUpdate)

Called after event_ui.

fn update(&mut self)

Called after every update_ui and info.

fn info(&mut self, _: &mut InfoUpdates)

Called when info rebuild is requested for windows and widgets.

fn register(&self, info: &mut AppExtensionsInfo)

where Self: Sized,

Register info abound this extension on the info list.

fn enable_device_events(&self) -> bool

If the application should notify raw device events.

fn event_ui(&mut self, update: &mut EventUpdate)

Called just before event.

fn update_preview(&mut self)

Called just before update_ui.

fn update_ui(&mut self, update_widgets: &mut WidgetUpdates)

Called just before update.

fn layout(&mut self, layout_widgets: &mut LayoutUpdates)

Called when layout is requested for windows and widgets.

fn deinit(&mut self)

Called when the application is exiting.

fn boxed(self) -> Box<dyn AppExtensionBoxed>

where Self: Sized,

Gets the extension boxed.

impl Default for FocusManager

fn default() -> FocusManager

Returns the “default value” for a type.