React TreeView Methods
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- Call Methods: Angular | Vue | React | jQuery | AngularJS | Knockout | ASP.NET MVC 5 | ASP.NET Core
beginUpdate()
Prevents the widget from refreshing until the endUpdate() method is called.
The beginUpdate() and endUpdate() methods prevent the widget from excessive updates when you are changing multiple widget settings at once. After the beginUpdate() method is called, the widget does not update its UI until the endUpdate() method is called.
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- Call Methods: Angular | Vue | React | jQuery | AngularJS | Knockout | ASP.NET MVC 5 | ASP.NET Core
defaultOptions(rule)
defaultOptions is a static method that the widget class supports. The following code demonstrates how to specify default options for all instances of the TreeView widget in an application executed on the desktop.
jQuery
DevExpress.ui.dxTreeView.defaultOptions({ device: { deviceType: "desktop" }, options: { // Here go the TreeView options } });
Angular
import TreeView from "devextreme/ui/tree_view"; // ... export class AppComponent { constructor () { TreeView.defaultOptions({ device: { deviceType: "desktop" }, options: { // Here go the TreeView options } }); } }
Vue
<template> <div> <DxTreeView id="treeView1" /> <DxTreeView id="treeView2" /> </div> </template> <script> import DxTreeView from "devextreme-vue/tree-view"; import TreeView from "devextreme/ui/tree_view"; TreeView.defaultOptions({ device: { deviceType: "desktop" }, options: { // Here go the TreeView options } }); export default { components: { DxTreeView } } </script>
React
import React from "react"; import dxTreeView from "devextreme/ui/tree_view"; import TreeView from "devextreme-react/tree-view"; class App extends React.Component { render () { dxTreeView.defaultOptions({ device: { deviceType: "desktop" }, options: { // Here go the TreeView options } }) return ( <div> <TreeView id="treeView1" /> <TreeView id="treeView2" /> </div> ) } } export default App;
dispose()
After calling this method, remove the DOM element associated with the widget:
jQuery
$("#myTreeView").dxTreeView("dispose"); $("#myTreeView").remove();
Angular
<dx-tree-view #treeViewVar id="myTreeView"></dx-tree-view>
import { ..., ViewChild } from "@angular/core"; import { DxTreeViewComponent } from "devextreme-angular"; // ... export class AppComponent { @ViewChild("treeViewVar", { static: false }) treeView: DxTreeViewComponent; // Prior to Angular 8 // @ViewChild("treeViewVar") treeView: DxTreeViewComponent; removeTreeView (e) { this.treeView.instance.dispose(); document.getElementById("myTreeView").remove(); } }
element()
An HTML element or a jQuery element when you use jQuery.
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- Call Methods: Angular | Vue | React | jQuery | AngularJS | Knockout | ASP.NET MVC 5 | ASP.NET Core
endUpdate()
Refreshes the widget after a call of the beginUpdate() method.
Main article: beginUpdate()
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- Call Methods: Angular | Vue | React | jQuery | AngularJS | Knockout | ASP.NET MVC 5 | ASP.NET Core
expandAll()
Expands all items. If you load items on demand, this method expands only the loaded items.
focus()
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getDataSource()
Gets the DataSource instance.
See Also
- Call Methods: Angular | Vue | React | jQuery | AngularJS | Knockout | ASP.NET MVC 5 | ASP.NET Core
- Data Layer - Overview
- Data Layer - DataSource Examples
getInstance(element)
getInstance is a static method that the widget class supports. The following code demonstrates how to get the TreeView instance found in an element with the myTreeView
ID:
// Modular approach import TreeView from "devextreme/ui/tree_view"; ... let element = document.getElementById("myTreeView"); let instance = TreeView.getInstance(element) as TreeView; // Non-modular approach let element = document.getElementById("myTreeView"); let instance = DevExpress.ui.dxTreeView.getInstance(element);
See Also
instance()
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off(eventName)
See Also
- Handle Events: Angular | Vue | React | jQuery | AngularJS | Knockout | ASP.NET MVC 5 | ASP.NET Core
off(eventName, eventHandler)
See Also
- Handle Events: Angular | Vue | React | jQuery | AngularJS | Knockout | ASP.NET MVC 5 | ASP.NET Core
on(eventName, eventHandler)
Use this method to subscribe to one of the events listed in the Events section.
See Also
- Handle Events: Angular | Vue | React | jQuery | AngularJS | Knockout | ASP.NET MVC 5 | ASP.NET Core
on(events)
Use this method to subscribe to several events with one method call. Available events are listed in the Events section.
See Also
- Handle Events: Angular | Vue | React | jQuery | AngularJS | Knockout | ASP.NET MVC 5 | ASP.NET Core
option()
Gets all widget options.
See Also
- Get and Set Options
- Call Methods: Angular | Vue | React | jQuery | AngularJS | Knockout | ASP.NET MVC 5 | ASP.NET Core
option(optionName)
See Also
- Get and Set Options
- Call Methods: Angular | Vue | React | jQuery | AngularJS | Knockout | ASP.NET MVC 5 | ASP.NET Core
option(optionName, optionValue)
See Also
- Get and Set Options
- Call Methods: Angular | Vue | React | jQuery | AngularJS | Knockout | ASP.NET MVC 5 | ASP.NET Core
option(options)
See Also
- Get and Set Options
- Call Methods: Angular | Vue | React | jQuery | AngularJS | Knockout | ASP.NET MVC 5 | ASP.NET Core
registerKeyHandler(key, handler)
A handler. Accepts the keydown event as the argument. It is a dxEvent or a jQuery.Event when you use jQuery.
The key argument accepts one of the following values:
- "backspace"
- "tab"
- "enter"
- "escape"
- "pageUp"
- "pageDown"
- "end"
- "home"
- "leftArrow"
- "upArrow"
- "rightArrow"
- "downArrow"
- "del"
- "space"
- "F"
- "A"
- "asterisk"
- "minus"
A custom handler for a key cancels the default handler for this key.
See Also
- Call Methods: Angular | Vue | React | jQuery | AngularJS | Knockout | ASP.NET MVC 5 | ASP.NET Core
repaint()
See Also
- reload() in DataSource | List
- refresh() in DataGrid | TreeList
- Call Methods: Angular | Vue | React | jQuery | AngularJS | Knockout | ASP.NET MVC 5 | ASP.NET Core
updateDimensions()
A Promise that is resolved if the widget is updated and rejected otherwise. It is a native Promise or a jQuery.Promise when you use jQuery.
If you have technical questions, please create a support ticket in the DevExpress Support Center.