# SelectionIndicatorViewModel

#### new Cesium.SelectionIndicatorViewModel(scene, selectionIndicatorElement, container)
Widgets/SelectionIndicator/SelectionIndicatorViewModel.js 33

The view model for `SelectionIndicator`.

Name | Type | Description
--- | --- | ---
`scene` | Scene | The scene instance to use for screen-space coordinate conversion.
`selectionIndicatorElement` | Element | The element containing all elements that make up the selection indicator.
`container` | Element | The DOM element that contains the widget.

### Members

#### computeScreenSpacePosition : SelectionIndicatorViewModel~ComputeScreenSpacePosition
Widgets/SelectionIndicator/SelectionIndicatorViewModel.js 100

Gets or sets the function for converting the world position of the object to the screen space position.

Default Value: `SceneTransforms.wgs84ToWindowCoordinates`

##### Example:

    selectionIndicatorViewModel.computeScreenSpacePosition = function(position, result) {
        return Cesium.SceneTransforms.wgs84ToWindowCoordinates(scene, position, result);
    };

#### container : Element
Widgets/SelectionIndicator/SelectionIndicatorViewModel.js 166

Gets the HTML element containing the selection indicator.

#### isVisible : Boolean
Widgets/SelectionIndicator/SelectionIndicatorViewModel.js 75

Gets the visibility of the position indicator. This can be false even if an object is selected, when the selected object has no position.

#### position : Cartesian3
Widgets/SelectionIndicator/SelectionIndicatorViewModel.js 60

Gets or sets the world position of the object for which to display the selection indicator.

#### scene : Scene
Widgets/SelectionIndicator/SelectionIndicatorViewModel.js 190

Gets the scene being used.

#### selectionIndicatorElement : Element
Widgets/SelectionIndicator/SelectionIndicatorViewModel.js 178

Gets the HTML element that holds the selection indicator.

#### showSelection : Boolean
Widgets/SelectionIndicator/SelectionIndicatorViewModel.js 66

Gets or sets the visibility of the selection indicator.

### Methods

#### animateAppear()
Widgets/SelectionIndicator/SelectionIndicatorViewModel.js 134

Animate the indicator to draw attention to the selection.

#### animateDepart()
Widgets/SelectionIndicator/SelectionIndicatorViewModel.js 148

Animate the indicator to release the selection.

#### update()
Widgets/SelectionIndicator/SelectionIndicatorViewModel.js 109

Updates the view of the selection indicator to match the position and content properties of the view model. This function should be called as part of the render loop.

### Type Definitions

#### ComputeScreenSpacePosition(position, result) → Cartesian2
Widgets/SelectionIndicator/SelectionIndicatorViewModel.js 197

A function that converts the world position of an object to a screen space position.

Name | Type | Description
--- | --- | ---
`position` | Cartesian3 | The position in WGS84 (world) coordinates.
`result` | Cartesian2 | An object to return the input position transformed to window coordinates.

##### Returns:

The modified result parameter.