Struct zng::focus::FocusChangedArgs

pub struct FocusChangedArgs {
    pub timestamp: DInstant,
    pub prev_focus: Option<InteractionPath>,
    pub new_focus: Option<InteractionPath>,
    pub highlight: bool,
    pub cause: FocusChangedCause,
    pub enabled_nav: FocusNavAction,
    /* private fields */
}

FOCUS_CHANGED_EVENT arguments.

Fields

timestamp: DInstant

Instant the event happened.

prev_focus: Option<InteractionPath>

Previously focused widget.

new_focus: Option<InteractionPath>

Newly focused widget.

highlight: bool

If the focused widget should visually indicate that it is focused.

This is true when the focus change is caused by a key press, false when it is caused by a mouse click.

Some widgets, like text input, may ignore this field and always indicate that they are focused.

cause: FocusChangedCause

What caused this event.

enabled_nav: FocusNavAction

Focus navigation actions that can move the focus away from the new_focus.

Implementations

impl FocusChangedArgs

pub fn new( timestamp: impl Into<DInstant>, propagation_handle: EventPropagationHandle, prev_focus: impl Into<Option<InteractionPath>>, new_focus: impl Into<Option<InteractionPath>>, highlight: impl Into<bool>, cause: impl Into<FocusChangedCause>, enabled_nav: impl Into<FocusNavAction>, ) -> FocusChangedArgs

New args from values that convert into the argument types.

pub fn now( prev_focus: impl Into<Option<InteractionPath>>, new_focus: impl Into<Option<InteractionPath>>, highlight: impl Into<bool>, cause: impl Into<FocusChangedCause>, enabled_nav: impl Into<FocusNavAction>, ) -> FocusChangedArgs

Arguments for event that happened now (INSTANT.now).

impl FocusChangedArgs

pub fn is_widget_move(&self) -> bool

If the focus is still in the same widget, but the widget path changed.

pub fn is_enabled_change(&self) -> bool

If the focus is still in the same widget path, but some or all interactivity has changed.

pub fn is_highlight_changed(&self) -> bool

If the focus is still in the same widget but highlight changed.

pub fn is_focus(&self, widget_id: WidgetId) -> bool

If widget_id is the new focus and was not before.

pub fn is_blur(&self, widget_id: WidgetId) -> bool

If widget_id is the previous focus and is not now.

pub fn is_focus_enter(&self, widget_id: WidgetId) -> bool

If widget_id is the new focus or a parent of the new focus and was not a parent of the previous focus.

pub fn is_focus_leave(&self, widget_id: WidgetId) -> bool

If widget_id is the previous focus or a parent of the previous focus and is not a parent of the new focus.

pub fn is_focused(&self, widget_id: WidgetId) -> bool

If the widget is the new focus.

pub fn is_focus_within(&self, widget_id: WidgetId) -> bool

If the widget is in the new focus path.

Trait Implementations

impl AnyEventArgs for FocusChangedArgs

fn delivery_list(&self, list: &mut UpdateDeliveryList)

The prev_focus and new_focus.

fn clone_any(&self) -> Box<dyn AnyEventArgs>

Clone the event into a type erased box.

fn as_any(&self) -> &(dyn Any + 'static)

Access to dyn Any methods.

fn timestamp(&self) -> DInstant

Gets the instant this event happened.

fn propagation(&self) -> &EventPropagationHandle

Propagation handle associated with this event instance.

impl Clone for FocusChangedArgs

fn clone(&self) -> FocusChangedArgs

Returns a copy of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for FocusChangedArgs

fn fmt(&self, f: &mut Formatter<'_>) -> Result<(), Error>

Formats the value using the given formatter.

impl EventArgs for FocusChangedArgs

fn handle<F, R>(&self, handler: F) -> Option<R>

where F: FnOnce(&Self) -> R,

Calls handler and stops propagation if propagation is still allowed.