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.
See Also
- Call Methods: jQuery | Angular | AngularJS | Knockout | ASP.NET MVC
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 CheckBox widget in an application executed on the desktop.
jQuery
DevExpress.ui.dxCheckBox.defaultOptions({ device: { deviceType: "desktop" }, options: { // Here go the CheckBox options } });
Angular
import CheckBox from 'devextreme/ui/check_box'; // ... export class AppComponent { constructor () { CheckBox.defaultOptions({ device: { deviceType: "desktop" }, options: { // Here go the CheckBox options } }); } }
dispose()
The following code disposes of an CheckBox instance that corresponds to the element ID (or reference variable in Angular) and removes the element from the DOM:
jQuery
$("#myCheckBox").dxCheckBox("dispose"); $("#myCheckBox").remove();
Angular
<dx-check-box #checkBoxVar id="myCheckBox"></dx-check-box>
import { ..., ViewChild } from "@angular/core"; import { DxCheckBoxComponent } from "devextreme-angular"; // ... export class AppComponent { @ViewChild("checkBoxVar") checkBox: DxCheckBoxComponent; removeCheckBox (e) { this.checkBox.instance.dispose(); document.getElementById("myCheckBox").remove(); } }
endUpdate()
Refreshes the widget after a call of the beginUpdate() method.
Main article: beginUpdate()
See Also
- Call Methods: jQuery | Angular | AngularJS | Knockout | ASP.NET MVC
getInstance(element)
getInstance is a static method that the widget class supports. The following code demonstrates how to get the CheckBox instance found in an element with the myCheckBox
ID:
// Modular approach import CheckBox from 'devextreme/ui/check_box'; ... let element = document.getElementById("myCheckBox"); let instance = CheckBox.getInstance(element) as CheckBox; // Non-modular approach let element = document.getElementById("myCheckBox"); let instance = DevExpress.ui.dxCheckBox.getInstance(element);
See Also
registerKeyHandler(key, handler)
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: jQuery | Angular | AngularJS | Knockout | ASP.NET MVC
If you have technical questions, please create a support ticket in the DevExpress Support Center.