Trait cacao::scrollview::ScrollViewDelegate

pub trait ScrollViewDelegate {
    fn did_load(&mut self, _view: ScrollView) { ... }
    fn will_appear(&self, _animated: bool) { ... }
    fn did_appear(&self, _animated: bool) { ... }
    fn will_disappear(&self, _animated: bool) { ... }
    fn did_disappear(&self, _animated: bool) { ... }
    fn dragging_entered(&self, _info: DragInfo) -> DragOperation { ... }
    fn prepare_for_drag_operation(&self, _info: DragInfo) -> bool { ... }
    fn perform_drag_operation(&self, _info: DragInfo) -> bool { ... }
    fn conclude_drag_operation(&self, _info: DragInfo) { ... }
    fn dragging_exited(&self, _info: DragInfo) { ... }
}

A ScrollViewDelegate implements methods that you might need or want to respond to. In addition to scroll-specific events, it enables implementing certain standard View handlers for things like drag and drop.

Provided Methods

fn did_load(&mut self, _view: ScrollView)

Called when the View is ready to work with. You’re passed a View - this is safe to store and use repeatedly, but it’s not thread safe - any UI calls must be made from the main thread!

fn will_appear(&self, _animated: bool)

Called when this is about to be added to the view heirarchy.

fn did_appear(&self, _animated: bool)

Called after this has been added to the view heirarchy.

fn will_disappear(&self, _animated: bool)

Called when this is about to be removed from the view heirarchy.

fn did_disappear(&self, _animated: bool)

Called when this has been removed from the view heirarchy.

fn dragging_entered(&self, _info: DragInfo) -> DragOperation

Invoked when the dragged image enters destination bounds or frame; returns dragging operation to perform.

fn prepare_for_drag_operation(&self, _info: DragInfo) -> bool

Invoked when the image is released, allowing the receiver to agree to or refuse drag operation.

fn perform_drag_operation(&self, _info: DragInfo) -> bool

Invoked after the released image has been removed from the screen, signaling the receiver to import the pasteboard data.

fn conclude_drag_operation(&self, _info: DragInfo)

Invoked when the dragging operation is complete, signaling the receiver to perform any necessary clean-up.

fn dragging_exited(&self, _info: DragInfo)

Invoked when the dragged image exits the destination’s bounds rectangle (in the case of a view) or its frame rectangle (in the case of a window object).

Implementors