CameraEventAggregator
查阅Mars3D API

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

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.
参数名称 类型 默认值 描述信息
canvas HTMLCanvasElement document 可选 The element to handle events for.
参考:

成员(属性)

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

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

Gets the current mouse position.

方法

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

Removes mouse listeners held by this object.

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.
使用示例:
handler = handler && handler.destroy();
参考:

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

Gets the time the button was pressed or the touch was started.
参数名称 类型 描述信息
type CameraEventType The camera event type.
modifier KeyboardEventModifier 可选 The keyboard modifier.
返回值:
The time the button was pressed or the touch was started.

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

Gets the time the button was released or the touch was ended.
参数名称 类型 描述信息
type CameraEventType The camera event type.
modifier KeyboardEventModifier 可选 The keyboard modifier.
返回值:
The time the button was released or the touch was ended.

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

Gets the start and end position of the last move event (not the aggregated event).
参数名称 类型 描述信息
type CameraEventType The camera event type.
modifier KeyboardEventModifier 可选 The keyboard modifier.
返回值:
An object with two Cartesian2 properties: startPosition and endPosition or undefined.

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

Gets the aggregated start and end position of the current event.
参数名称 类型 描述信息
type CameraEventType The camera event type.
modifier KeyboardEventModifier 可选 The keyboard modifier.
返回值:
An object with two Cartesian2 properties: startPosition and endPosition.

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

Gets the mouse position that started the aggregation.
参数名称 类型 描述信息
type CameraEventType The camera event type.
modifier KeyboardEventModifier 可选 The keyboard modifier.
返回值:
The mouse position.

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

Gets whether the mouse button is down or a touch has started.
参数名称 类型 描述信息
type CameraEventType The camera event type.
modifier KeyboardEventModifier 可选 The keyboard modifier.
返回值:
Whether the mouse button is down or a touch has started.

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

Returns true if this object was destroyed; otherwise, false.

If this object was destroyed, it should not be used; calling any function other than isDestroyed will result in a DeveloperError exception.
返回值:
true if this object was destroyed; otherwise, false.
参考:

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

Gets if a mouse button down or touch has started and has been moved.
参数名称 类型 描述信息
type CameraEventType The camera event type.
modifier KeyboardEventModifier 可选 The keyboard modifier.
返回值:
Returns true if a mouse button down or touch has started and has been moved; otherwise, false

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

Signals that all of the events have been handled and the aggregator should be reset to handle new events.
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