程序包 ohos.agp.components

类 DragInfo

java.lang.Object

ohos.agp.components.DragInfo

public class DragInfo
extends Object

Stores the data of identified dragging gestures.

This class stores data specific to a dragging gesture that has been identified, and returns the data with the callback function.

从以下版本开始:

3

字段概要

字段

限定符和类型	字段	说明
Point	downPoint	Indicates the coordinate of the position where the finger touches the screen.
Point	startPoint	Indicates the coordinate of the position where the finger starts dragging.
Point	updatePoint	Indicates the coordinate of the update position when the finger is dragging.
double	xOffset	Indicates the horizontal offset.
double	xVelocity	Indicates the velocity of horizontal dragging, in unit of pixels per second.
double	yOffset	Indicates the vertical offset.
double	yVelocity	Indicates the velocity of vertical dragging, in unit of pixels per second.

构造器概要

构造器

构造器	说明
DragInfo(Point downPoint, Point startPoint, Point updatePoint, double xOffset, double yOffset, double xVelocity, double yVelocity)	Creates information of a dragging gesture.

方法概要

从类继承的方法 java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

字段详细资料

downPoint

public final Point downPoint

Indicates the coordinate of the position where the finger touches the screen.

startPoint

public final Point startPoint

Indicates the coordinate of the position where the finger starts dragging.

Once the dragging gesture is identified, where the finger presses against is regarded as the startPoint.

updatePoint

public final Point updatePoint

Indicates the coordinate of the update position when the finger is dragging. Once the drag event is triggered, the current position of the finger during dragging is regarded as the update position.

xOffset

public final double xOffset

Indicates the horizontal offset.

The horizontal offset is obtained compared with the previous horizontal dragging.

xVelocity

public final double xVelocity

Indicates the velocity of horizontal dragging, in unit of pixels per second.

yOffset

public final double yOffset

Indicates the vertical offset.

The vertical offset is obtained compared with the previous vertical dragging.

yVelocity

public final double yVelocity

Indicates the velocity of vertical dragging, in unit of pixels per second.

构造器详细资料

DragInfo

public DragInfo(Point downPoint,
                Point startPoint,
                Point updatePoint,
                double xOffset,
                double yOffset,
                double xVelocity,
                double yVelocity)

Creates information of a dragging gesture.

参数:

downPoint - Indicates the coordinate of the position where the finger touches the screen.

startPoint - Indicates the coordinate of the position where the finger starts dragging.

updatePoint - Indicates the coordinate of the update position when the finger is dragging.

xOffset - Indicates the horizontal offset, in unit of pixels.

yOffset - Indicates the vertical offset, in unit of pixels.

xVelocity - Indicates the horizontal velocity, in unit of pixels per second.

yVelocity - Indicates the vertical velocity, in unit of pixels per second.