程序包 ohos.agp.components

接口 Component.DraggedListener

封闭类:

Component

public static interface Component.DraggedListener

Provides callbacks to be invoked when a drag event is dispatched to a component by a gesture recognizer.

从以下版本开始:

3

方法概要

限定符和类型	方法	说明
void	onDragCancel(Component component, DragInfo dragInfo)	process a drag cancel event dispatched to the component.
void	onDragDown(Component component, DragInfo dragInfo)	Process a drag down event dispatched to the component.
void	onDragEnd(Component component, DragInfo dragInfo)	Process a drag end event dispatched to the component.
default boolean	onDragPreAccept(Component component, int dragDirection)	Accepts the drag event dispatched to a component.
void	onDragStart(Component component, DragInfo dragInfo)	Process a drag start event dispatched to the component.
void	onDragUpdate(Component component, DragInfo dragInfo)	Process a drag update event dispatched to the component.

方法详细资料

onDragDown

void onDragDown(Component component,
                DragInfo dragInfo)

Process a drag down event dispatched to the component.

参数:

component - Indicates the component to which the drag down event is dispatched.

dragInfo - Indicates the drag down info object DragInfo.

onDragStart

void onDragStart(Component component,
                 DragInfo dragInfo)

Process a drag start event dispatched to the component.

参数:

component - Indicates the component to which the drag start event is dispatched.

dragInfo - Indicates the drag start info object DragInfo.

onDragUpdate

void onDragUpdate(Component component,
                  DragInfo dragInfo)

Process a drag update event dispatched to the component.

参数:

component - Indicates the component to which the drag update event is dispatched.

dragInfo - Indicates the drag update info object DragInfo.

onDragEnd

void onDragEnd(Component component,
               DragInfo dragInfo)

Process a drag end event dispatched to the component.

参数:

component - Indicates the component to which the drag end event is dispatched.

dragInfo - Indicates the drag end info object DragInfo.

onDragCancel

void onDragCancel(Component component,
                  DragInfo dragInfo)

process a drag cancel event dispatched to the component.

参数:

component - Indicates the component to which the drag end event is dispatched.

dragInfo - Indicates the drag end info object DragInfo.

onDragPreAccept

default boolean onDragPreAccept(Component component,
                                int dragDirection)

Accepts the drag event dispatched to a component.

This method supports the Component.DRAG_HORIZONTAL, Component.DRAG_VERTICAL and Component.DRAG_HORIZONTAL_VERTICAL. When Component.DRAG_HORIZONTAL_VERTICAL is set, the drag direction may be rough.

参数:

component - Indicates the component to which a drag event is dispatched.

dragDirection - Indicates the drag direction, which can be Component.DRAG_UP, Component.DRAG_DOWN, Component.DRAG_LEFT, or Component.DRAG_RIGHT.

返回:

Returns true (default value) if the current drag event is accepted; returns false otherwise.

从以下版本开始:

4