Struct widgetry::EventCtx [−][src]
pub struct EventCtx<'a> {
pub(crate) fake_mouseover: bool,
pub input: UserInput,
pub canvas: &'a mut Canvas,
pub prerender: &'a Prerender,
pub(crate) style: &'a mut Style,
pub(crate) updates_requested: Vec<UpdateType>,
pub(crate) canvas_movement_called: bool,
pub(crate) focus_owned_by: Option<String>,
pub(crate) next_focus_owned_by: Option<String>,
}
Fields
fake_mouseover: bool
input: UserInput
canvas: &'a mut Canvas
prerender: &'a Prerender
style: &'a mut Style
updates_requested: Vec<UpdateType>
canvas_movement_called: bool
focus_owned_by: Option<String>
This widget (in some panel) exclusively owns focus. Don’t modify.
next_focus_owned_by: Option<String>
While handling an event, this widget (in some panel) this widget declared that it owns
focus. This will become focus_owned_by
during the next event.
Implementations
pub fn loading_screen<O, S: Into<String>, F: FnOnce(&mut EventCtx<'_>, &mut Timer<'_>) -> O>(
&mut self,
raw_timer_name: S,
f: F
) -> O
Allow panning and zooming on the canvas. Exactly which controls are active (click-and-drag, auto-pan at the edge of the screen, using arrow keys, etc) depend on options set. Returns true if the canvas moved at all.
pub fn no_op_event<O, F: FnMut(&mut EventCtx<'_>) -> O>(
&mut self,
fake_mouseover: bool,
cb: F
) -> O
Checks if an extra font has previously been loaded with load_font
. Returns false for
built-in system fonts.
Loads an extra font, used only for automatic fallback of missing glyphs.
Trait Implementations
Auto Trait Implementations
impl<'a> !RefUnwindSafe for EventCtx<'a>
impl<'a> !UnwindSafe for EventCtx<'a>
Blanket Implementations
Mutably borrows from an owned value. Read more
impl<T> Downcast for T where
T: Any,
impl<T> Downcast for T where
T: Any,
Convert Box<dyn Trait>
(where Trait: Downcast
) to Box<dyn Any>
. Box<dyn Any>
can
then be further downcast
into Box<ConcreteType>
where ConcreteType
implements Trait
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pub fn into_any_rc(self: Rc<T>) -> Rc<dyn Any + 'static>
pub fn into_any_rc(self: Rc<T>) -> Rc<dyn Any + 'static>
Convert Rc<Trait>
(where Trait: Downcast
) to Rc<Any>
. Rc<Any>
can then be
further downcast
into Rc<ConcreteType>
where ConcreteType
implements Trait
. Read more
Convert &Trait
(where Trait: Downcast
) to &Any
. This is needed since Rust cannot
generate &Any
’s vtable from &Trait
’s. Read more
pub fn as_any_mut(&mut self) -> &mut (dyn Any + 'static)
pub fn as_any_mut(&mut self) -> &mut (dyn Any + 'static)
Convert &mut Trait
(where Trait: Downcast
) to &Any
. This is needed since Rust cannot
generate &mut Any
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Instruments this type with the provided Span
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type Output = T
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