Trait gtk4::prelude::GestureDragExt

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pub trait GestureDragExt: 'static {
    // Required methods
    fn offset(&self) -> Option<(f64, f64)>;
    fn start_point(&self) -> Option<(f64, f64)>;
    fn connect_drag_begin<F: Fn(&Self, f64, f64) + 'static>(
        &self,
        f: F
    ) -> SignalHandlerId;
    fn connect_drag_end<F: Fn(&Self, f64, f64) + 'static>(
        &self,
        f: F
    ) -> SignalHandlerId;
    fn connect_drag_update<F: Fn(&Self, f64, f64) + 'static>(
        &self,
        f: F
    ) -> SignalHandlerId;
}
Expand description

Trait containing all GestureDrag methods.

Implementors

GestureDrag, GesturePan

Required Methods§

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fn offset(&self) -> Option<(f64, f64)>

Gets the offset from the start point.

If the @self is active, this function returns true and fills in @x and @y with the coordinates of the current point, as an offset to the starting drag point.

Returns

true if the gesture is active

x

X offset for the current point

y

Y offset for the current point

source

fn start_point(&self) -> Option<(f64, f64)>

Gets the point where the drag started.

If the @self is active, this function returns true and fills in @x and @y with the drag start coordinates, in widget-relative coordinates.

Returns

true if the gesture is active

x

X coordinate for the drag start point

y

Y coordinate for the drag start point

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fn connect_drag_begin<F: Fn(&Self, f64, f64) + 'static>( &self, f: F ) -> SignalHandlerId

Emitted whenever dragging starts.

start_x

X coordinate, relative to the widget allocation

start_y

Y coordinate, relative to the widget allocation

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fn connect_drag_end<F: Fn(&Self, f64, f64) + 'static>( &self, f: F ) -> SignalHandlerId

Emitted whenever the dragging is finished.

offset_x

X offset, relative to the start point

offset_y

Y offset, relative to the start point

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fn connect_drag_update<F: Fn(&Self, f64, f64) + 'static>( &self, f: F ) -> SignalHandlerId

Emitted whenever the dragging point moves.

offset_x

X offset, relative to the start point

offset_y

Y offset, relative to the start point

Implementors§