KBE3D / KBCore / Cesium / CallbackProperty

类: CallbackProperty

A Property whose value is lazily evaluated by a callback function.

参数

The function to be called when the property is evaluated.

参数

<code>true</code> when the callback function returns the same value every time, <code>false</code> if the value will change.

属性

isConstant

readonly isConstant: boolean

Gets a value indicating if this property is constant.

---

definitionChanged

readonly definitionChanged: Event

Gets the event that is raised whenever the definition of this property changes. The definition is changed whenever setCallback is called.

方法

getValue()

getValue(time?: JulianDate, result?: any): any

Gets the value of the property.

参数

time?

JulianDate

The time for which to retrieve the value. If omitted, the current system time is used.

result?

any

The object to store the value into, if omitted, a new instance is created and returned.

返回

any

The modified result parameter or a new instance if the result parameter was not supplied or is unsupported.

---

setCallback()

setCallback(callback: Callback, isConstant: boolean): void

Sets the callback to be used.

参数

callback

Callback

The function to be called when the property is evaluated.

isConstant

boolean

<code>true</code> when the callback function returns the same value every time, <code>false</code> if the value will change.

返回

void

---

equals()

equals(other?: Property): boolean

Compares this property to the provided property and returns <code>true</code> if they are equal, <code>false</code> otherwise.

参数

other?

Property

The other property.

返回

boolean

true if left and right are equal, false otherwise.

构造函数

构造函数

new CallbackProperty(callback: Callback, isConstant: boolean): CallbackProperty

参数

callback

Callback

isConstant

boolean

返回

CallbackProperty