CameraEventAggregator - CesiumJS API 文档

new Cesium.CameraEventAggregator(canvas)

汇总输入事件。例如,假设框架之间收到下列输入: 鼠标左键下移,鼠标移动,鼠标左键上移. 这些活动将归纳为: 一个带有鼠标始末位置的事件.

Name	Type	Default	Description
`canvas`	HTMLCanvasElement	`文档`	optional 用于处理事件的元素 .

See:

ScreenSpaceEventHandler

Members

anyButtonDown : boolean

获取鼠标按钮是否降下, 是否开始触摸, 或是否移动了方向盘 .

currentMousePosition : Cartesian2

获取当前鼠标位置.

Methods

destroy()

删除该对象所持有的鼠标听众.

Once an object is destroyed, it should not be used; calling any function other than isDestroyed will result in a DeveloperError exception. Therefore, assign the return value (undefined) to the object as done in the example.

Throws:

DeveloperError : This object was destroyed, i.e., destroy() was called.

Example:

handler = handler && handler.destroy();

See:

CameraEventAggregator#isDestroyed

getButtonPressTime(type, modifier) → Date

获得按下按钮或启动触摸的时间 .

Name	Type	Description
`type`	CameraEventType	相机事件类型.
`modifier`	KeyboardEventModifier	optional 键盘修饰器.

Returns:

按下按钮或开始触摸的时间 .

getButtonReleaseTime(type, modifier) → Date

获取按钮释放或触摸结束的时间 .

Name	Type	Description
`type`	CameraEventType	相机事件类型.
`modifier`	KeyboardEventModifier	optional 键盘修饰器.

Returns:

按钮释放或触摸结束的时间.

getLastMovement(type, modifier) → object|undefined

获取上次移动事件的开始和结束位置(不是集合事件).

Name	Type	Description
`type`	CameraEventType	相机事件类型.
`modifier`	KeyboardEventModifier	optional 键盘修饰器.

Returns:

An object with two Cartesian2 properties: startPosition and endPosition or undefined.

getMovement(type, modifier) → object

获取当前事件的起始和结束位置.

Name	Type	Description
`type`	CameraEventType	相机事件类型.
`modifier`	KeyboardEventModifier	optional 键盘修饰器.

Returns:

An object with two Cartesian2 properties: startPosition and endPosition.

getStartMousePosition(type, modifier) → Cartesian2

获取启动聚合的鼠标位置 .

Name	Type	Description
`type`	CameraEventType	相机事件类型.
`modifier`	KeyboardEventModifier	optional 键盘修饰器.

Returns:

鼠标位置.

isButtonDown(type, modifier) → boolean

获取鼠标按钮是否在下方或触摸开始 .

Name	Type	Description
`type`	CameraEventType	相机事件类型.
`modifier`	KeyboardEventModifier	optional 键盘修饰器.

Returns:

鼠标按钮是否在下方或触摸已启动 .

isDestroyed() → boolean

如果此对象被销毁, 返回真实; 否则, 错误 .

If this object was destroyed, it should not be used; calling any function other than isDestroyed will result in a DeveloperError exception.

Returns:

true if this object was destroyed; otherwise, false.

See:

CameraEventAggregator#destroy

isMoving(type, modifier) → boolean

如果鼠标按钮下移或触摸已启动并已移动, 则获取 .

Name	Type	Description
`type`	CameraEventType	相机事件类型.
`modifier`	KeyboardEventModifier	optional 键盘修饰器.

Returns:

Returns true if a mouse button down or touch has started and has been moved; otherwise, false

reset()

所有事件都已处理完毕的信号,聚合器应当重置,以处理新的事件.