A
Property whose value is a key-value mapping of property names to the computed value of other properties.
| 参数名称 | 类型 | 描述信息 |
|---|---|---|
value |
object | 可选 An object, containing key-value mapping of property names to properties. |
createPropertyCallback |
function | 可选 A function that will be called when the value of any of the properties in value are not a Property. |
成员(属性)
readonly definitionChanged : Event
Gets the event that is raised whenever the set of properties contained in this
object changes, or one of the properties itself changes.
Gets a value indicating if this property is constant. This property
is considered constant if all property items in this object are constant.
Gets the names of all properties registered on this instance.
方法
Adds a property to this object.
| 参数名称 | 类型 | 描述信息 |
|---|---|---|
propertyName |
string | The name of the property to add. |
value |
* | 可选 The value of the new property, if provided. |
createPropertyCallback |
function | 可选 A function that will be called when the value of this new property is set to a value that is not a Property. |
Throws:
-
DeveloperError : "propertyName" is already a registered property.
Compares this property to the provided property and returns
true if they are equal, false otherwise.
| 参数名称 | 类型 | 描述信息 |
|---|---|---|
other |
Property | 可选 The other property. |
返回值:
true if left and right are equal, false otherwise.
Gets the value of this property. Each contained property will be evaluated at the given time, and the overall
result will be an object, mapping property names to those values.
| 参数名称 | 类型 | 默认值 | 描述信息 |
|---|---|---|---|
time |
JulianDate |
JulianDate.now()
|
可选 The time for which to retrieve the value. If omitted, the current system time is used. |
result |
object | 可选 The object to store the value into, if omitted, a new instance is created and returned. Note that any properties in result which are not part of this PropertyBag will be left as-is. |
返回值:
The modified result parameter or a new instance if the result parameter was not supplied.
Determines if this object has defined a property with the given name.
| 参数名称 | 类型 | 描述信息 |
|---|---|---|
propertyName |
string | The name of the property to check for. |
返回值:
True if this object has defined a property with the given name, false otherwise.
Assigns each unassigned property on this object to the value
of the same property on the provided source object.
| 参数名称 | 类型 | 描述信息 |
|---|---|---|
source |
object | The object to be merged into this object. |
createPropertyCallback |
function | 可选 A function that will be called when the value of any of the properties in value are not a Property. |
Removed a property previously added with addProperty.
| 参数名称 | 类型 | 描述信息 |
|---|---|---|
propertyName |
string | The name of the property to remove. |
Throws:
-
DeveloperError : "propertyName" is not a registered property.