# TreeView

Adds supports for \[ System.Windows.Forms.TreeView]\(<https://msdn.microsoft.com/en-us/library/system.windows.forms.treeview(v=vs.110).aspx>)

## Implementation  Details:

> **Component Selector:** 'wm-treeview'
>
> **Kendo UI Component:** [Kendo TreeView](https://www.telerik.com/kendo-angular-ui/components/treeview/)

## Class inheritance

TreeViewComponent extends [ControlComponent](/webmap/general/frontend/documentation/winforms-angular-components/web-components/base-components/control-component.md).

## PME Support

### Properties

| Property                             | Get/Set | Notify Changes | Details                                                                                                                                                                         |
| ------------------------------------ | ------- | -------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| items: any                           | Yes     | No             | Used to return/set the datasource value.                                                                                                                                        |
| defaultDataUrl: string               | No      | No             | Default URL to call the API and get the data.                                                                                                                                   |
| url: string                          | Get     | No             | Returns the value of the dataUrl if was set, overwise return the defaultDataUrl.                                                                                                |
| expandedKeys: any\[]                 | No      | No             | List of expanded keys on the treeview.                                                                                                                                          |
| disabledKeys: any\[]                 | No      | No             | List of disabled keys on the treeview.                                                                                                                                          |
| checkedKeys: any\[]                  | No      | No             | List of checked keys on the treeview.                                                                                                                                           |
| selectedKey: any\[]                  | No      | No             | Selected key on the treeview.                                                                                                                                                   |
| checkableSettings: CheckableSettings | Get     | No             | Returns the settings for the chechboxes property.                                                                                                                               |
| checkboxes: boolean                  | Yes     | No             | Get/Set the checkboxes property value.                                                                                                                                          |
| selectedNode: any\[]                 | Yes     | Yes            | Get/Set the selectedNode property value.                                                                                                                                        |
| text: string                         | Yes     | Yes            | Inherited from ControlComponent [see ControlComponent](/webmap/general/frontend/documentation/winforms-angular-components/web-components/base-components/control-component.md). |
| name: string                         | Yes     | No             | Inherited from ControlComponent [see ControlComponent](/webmap/general/frontend/documentation/winforms-angular-components/web-components/base-components/control-component.md). |
| enabled: boolean                     | Yes     | No             | Inherited from ControlComponent [see ControlComponent](/webmap/general/frontend/documentation/winforms-angular-components/web-components/base-components/control-component.md). |
| visible: boolean                     | Yes     | No             | Inherited from ControlComponent [see ControlComponent](/webmap/general/frontend/documentation/winforms-angular-components/web-components/base-components/control-component.md). |
| selectedNodeInfo: any\[]             | Yes     | No             | Get/Set the selectedNodeInfo using the kendo treeview required format.                                                                                                          |
| refreshExpandedKeys: bool            | true    | No             | Get/Set the refreshExpandedKeys flag. When true the updateExpandedKeys is triggered.                                                                                            |

### Methods

| Method                   | Supported | Details                                                                                                                                           |
| ------------------------ | --------- | ------------------------------------------------------------------------------------------------------------------------------------------------- |
| ngOnInit: void           | Yes       | Used to register any function that to be trigger when it initialize.                                                                              |
| updateExpandedKeys: void | Yes       | Used to refresh the expandedkeys collection of a treeView.                                                                                        |
| scrollDelay: void        | Yes       | Used to obtain the ammount of time to wait until an element appears into the DOM to moves the scroll to ensure the visibility. Default value 300. |

### Events

| Event       | Supported | Parameter       | Details                                                                                                                             |
| ----------- | --------- | --------------- | ----------------------------------------------------------------------------------------------------------------------------------- |
| Click       | Yes       | **$event**: any | Trigger Click event. ***$event*** parameter is optional and the ***$event***  object vary depending on the type of DOM event.       |
| DoubleClick | Yes       | **$event**: any | Trigger DoubleClick event. ***$event*** parameter is optional and the ***$event***  object vary depending on the type of DOM event. |
| MouseDown   | Yes       | **$event**: any | Trigger MouseDown event. ***$event*** parameter is optional and the ***$event***  object vary depending on the type of DOM event.   |
| AfterSelect | Yes       | **$event**: any | Trigger AfterSelect event. ***$event*** parameter is optional and the ***$event***  object vary depending on the type of DOM event. |


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