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CameraEventAggregator

new Cesium.CameraEventAggregator(canvas)
engine/Source/Scene/CameraEventAggregator.js 357

聚合输入事件。例如，假设在帧之间接收到以下输入：鼠标左键按下、鼠标移动、鼠标移动、鼠标左键按下。这些事件将聚合为一个带有鼠标开始位置和结束位置的事件。 Aggregates input events. For example, suppose the following inputs are received between frames: left mouse button down, mouse move, mouse move, left mouse button up. These events will be aggregated into one event with a start and end position of the mouse.
名称 Name 类型 Type 默认值 Default 说明 Description
canvas HTMLCanvasElement document 可选 optional 处理事件的元素。 The element to handle events for.
另见： See:

成员 Members

anyButtonDown : boolean
engine/Source/Scene/CameraEventAggregator.js 417

获取是否按下任何鼠标按钮、是否已开始触摸或是否已移动滚轮。 Gets whether any mouse button is down, a touch has started, or the wheel has been moved.

currentMousePosition : Cartesian2
engine/Source/Scene/CameraEventAggregator.js 406

获取当前鼠标位置。 Gets the current mouse position.

方法 Methods

destroy()
engine/Source/Scene/CameraEventAggregator.js 615

删除该对象持有的鼠标侦听器。 Removes mouse listeners held by this object.

一旦对象被销毁，就不应再使用；调用除 Once an object is destroyed, it should not be used; calling any function other than isDestroyed 将导致 will result in a DeveloperError 例外。因此，分配返回值（ exception. Therefore, assign the return value (undefined) 到对象，如示例中所做的那样。 ) to the object as done in the example.
抛出： Throws:
  • DeveloperError : This object was destroyed, i.e., destroy() was called.
示例： Example:
handler = handler && handler.destroy();
另见： See:

getButtonPressTime(type, modifier) → Date
engine/Source/Scene/CameraEventAggregator.js 543

获取按下按钮或开始触摸的时间。 Gets the time the button was pressed or the touch was started.
名称 Name 类型 Type 说明 Description
type CameraEventType 相机事件类型。 The camera event type.
modifier KeyboardEventModifier 可选 optional 键盘修改器。 The keyboard modifier.
返回： Returns:
按下按钮或开始触摸的时间。 The time the button was pressed or the touch was started.

getButtonReleaseTime(type, modifier) → Date
engine/Source/Scene/CameraEventAggregator.js 561

获取按钮被释放或触摸结束的时间。 Gets the time the button was released or the touch was ended.
名称 Name 类型 Type 说明 Description
type CameraEventType 相机事件类型。 The camera event type.
modifier KeyboardEventModifier 可选 optional 键盘修改器。 The keyboard modifier.
返回： Returns:
释放按钮或触摸结束的时间。 The time the button was released or the touch was ended.

getLastMovement(type, modifier) → object|undefined
engine/Source/Scene/CameraEventAggregator.js 477

获取最后一个移动事件（不是聚合事件）的开始和结束位置。 Gets the start and end position of the last move event (not the aggregated event).
名称 Name 类型 Type 说明 Description
type CameraEventType 相机事件类型。 The camera event type.
modifier KeyboardEventModifier 可选 optional 键盘修改器。 The keyboard modifier.
返回： Returns:
一个物体有两个 An object with two Cartesian2 properties: startPosition and endPosition or undefined.

getMovement(type, modifier) → object
engine/Source/Scene/CameraEventAggregator.js 458

获取当前事件的聚合开始和结束位置。 Gets the aggregated start and end position of the current event.
名称 Name 类型 Type 说明 Description
type CameraEventType 相机事件类型。 The camera event type.
modifier KeyboardEventModifier 可选 optional 键盘修改器。 The keyboard modifier.
返回： Returns:
一个物体有两个 An object with two Cartesian2 properties: startPosition and endPosition.

getStartMousePosition(type, modifier) → Cartesian2
engine/Source/Scene/CameraEventAggregator.js 518

获取开始聚合的鼠标位置。 Gets the mouse position that started the aggregation.
名称 Name 类型 Type 说明 Description
type CameraEventType 相机事件类型。 The camera event type.
modifier KeyboardEventModifier 可选 optional 键盘修改器。 The keyboard modifier.
返回： Returns:
鼠标位置。 The mouse position.

isButtonDown(type, modifier) → boolean
engine/Source/Scene/CameraEventAggregator.js 500

获取鼠标按钮是否按下或触摸是否已开始。 Gets whether the mouse button is down or a touch has started.
名称 Name 类型 Type 说明 Description
type CameraEventType 相机事件类型。 The camera event type.
modifier KeyboardEventModifier 可选 optional 键盘修改器。 The keyboard modifier.
返回： Returns:
鼠标按钮是否已按下或触摸是否已开始。 Whether the mouse button is down or a touch has started.

isDestroyed() → boolean
engine/Source/Scene/CameraEventAggregator.js 596

如果该对象被销毁则返回 true；否则为假。 Returns true if this object was destroyed; otherwise, false.

如果该对象被破坏，则不应使用它；调用除 If this object was destroyed, it should not be used; calling any function other than isDestroyed 将导致 will result in a DeveloperError exception.
返回： Returns:
true 如果该物体被摧毁；否则， if this object was destroyed; otherwise, false.
另见： See:

isMoving(type, modifier) → boolean
engine/Source/Scene/CameraEventAggregator.js 440

获取鼠标按钮按下或触摸是否已开始并已移动。 Gets if a mouse button down or touch has started and has been moved.
名称 Name 类型 Type 说明 Description
type CameraEventType 相机事件类型。 The camera event type.
modifier KeyboardEventModifier 可选 optional 键盘修改器。 The keyboard modifier.
返回： Returns:
Returns true 如果鼠标按钮按下或触摸已开始并已移动；否则， if a mouse button down or touch has started and has been moved; otherwise, false

reset()
engine/Source/Scene/CameraEventAggregator.js 578

表示所有事件均已处理，并且应重置聚合器以处理新事件。 Signals that all of the events have been handled and the aggregator should be reset to handle new events.
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