JavaScript/jQuery Menu API
The Menu UI component is a panel with clickable items. A click on an item opens a drop-down menu, which can contain several submenus.
Options
An object defining configuration properties for the Menu UI component.
| Name | Description |
|---|---|
| accessKey | Specifies the shortcut key that sets focus on the UI component. |
| activeStateEnabled | Specifies whether the UI component changes its state as a result of user interaction. |
| adaptivityEnabled | Specifies whether adaptive rendering is enabled. This property is in effect only if the orientation is "horizontal". |
| animation | Configures UI component visibility animations. This object contains two fields: show and hide. |
| cssClass | Specifies the name of the CSS class to be applied to the root menu level and all submenus. |
| dataSource | Binds the UI component to data. |
| disabled | Specifies whether the UI component responds to user interaction. |
| disabledExpr | Specifies the name of the data source item field whose value defines whether or not the corresponding UI component item is disabled. |
| displayExpr | Specifies the data field whose values should be displayed. |
| elementAttr | Specifies the global attributes to be attached to the UI component's container element. |
| focusStateEnabled | Specifies whether the UI component can be focused using keyboard navigation. |
| height | Specifies the UI component's height. |
| hideSubmenuOnMouseLeave | Specifies whether or not the submenu is hidden when the mouse pointer leaves it. |
| hint | Specifies text for a hint that appears when a user pauses on the UI component. |
| hoverStateEnabled | Specifies whether the UI component changes its state when a user pauses on it. |
| itemComponent | An alias for the itemTemplate property specified in React. Accepts a custom component. Refer to Using a Custom Component for more information. |
| itemRender | An alias for the itemTemplate property specified in React. Accepts a rendering function. Refer to Using a Rendering Function for more information. |
| items | Holds an array of menu items. |
| itemsExpr | Specifies which data field contains nested items. |
| itemTemplate | Specifies a custom template for items. |
| onContentReady | A function that is executed when the UI component's content is ready and each time the content is changed. |
| onDisposing | A function that is executed before the UI component is disposed of. |
| onInitialized | A function used in JavaScript frameworks to save the UI component instance. |
| onItemClick | A function that is executed when a collection item is clicked or tapped. |
| onItemContextMenu | A function that is executed when a collection item is right-clicked or pressed. |
| onItemRendered | A function that is executed after a collection item is rendered. |
| onOptionChanged | A function that is executed after a UI component property is changed. |
| onSelectionChanged | A function that is executed when a collection item is selected or selection is canceled. |
| onSubmenuHidden | A function that is executed after a submenu is hidden. |
| onSubmenuHiding | A function that is executed before a submenu is hidden. |
| onSubmenuShowing | A function that is executed before a submenu is displayed. |
| onSubmenuShown | A function that is executed after a submenu is displayed. |
| orientation | Specifies whether the menu has horizontal or vertical orientation. |
| rtlEnabled | Switches the UI component to a right-to-left representation. |
| selectByClick | Specifies whether or not an item becomes selected if a user clicks it. |
| selectedExpr | Specifies the name of the data source item field whose value defines whether or not the corresponding UI component items is selected. |
| selectedItem | The selected item object. |
| selectionMode | Specifies the selection mode supported by the menu. |
| showFirstSubmenuMode | Specifies properties for showing and hiding the first level submenu. |
| showSubmenuMode | Specifies properties of submenu showing and hiding. |
| submenuDirection | Specifies the direction at which the submenus are displayed. |
| tabIndex | Specifies the number of the element when the Tab key is used for navigating. |
| visible | Specifies whether the UI component is visible. |
| width | Specifies the UI component's width. |
Methods
This section describes members used to manipulate the UI component.
| Name | Description |
|---|---|
| beginUpdate() | Prevents the UI component from refreshing until the endUpdate() method is called. |
| defaultOptions(rule) | Specifies the device-dependent default configuration properties for this component. |
| dispose() | Disposes of all the resources allocated to the Menu instance. |
| element() | Gets the root UI component element. |
| endUpdate() | Refreshes the UI component after a call of the beginUpdate() method. |
| focus() | Sets focus on the UI component. |
| getDataSource() | Gets the DataSource instance. |
| getInstance(element) | Gets the instance of a UI component found using its DOM node. |
| instance() | Gets the UI component's instance. Use it to access other methods of the UI component. |
| off(eventName) | Detaches all event handlers from a single event. |
| off(eventName, eventHandler) | Detaches a particular event handler from a single event. |
| on(eventName, eventHandler) | Subscribes to an event. |
| on(events) | Subscribes to events. |
| option() | Gets all UI component properties. |
| option(optionName) | Gets the value of a single property. |
| option(optionName, optionValue) | Updates the value of a single property. |
| option(options) | Updates the values of several properties. |
| registerKeyHandler(key, handler) | Registers a handler to be executed when a user presses a specific key. |
| repaint() | Repaints the UI component without reloading data. Call it to update the UI component's markup. |
| resetOption(optionName) | Resets a property to its default value. |
| selectItem(itemElement) | Selects an item found using its DOM node. |
| unselectItem(itemElement) | Cancels the selection of an item found using its DOM node. |
Events
This section describes events fired by this UI component.
| Name | Description |
|---|---|
| contentReady | Raised when the UI component's content is ready. |
| disposing | Raised before the UI component is disposed of. |
| initialized | Raised only once, after the UI component is initialized. |
| itemClick | Raised when a collection item is clicked or tapped. |
| itemContextMenu | Raised when a collection item is right-clicked or pressed. |
| itemRendered | Raised after a collection item is rendered. |
| optionChanged | Raised after a UI component property is changed. |
| selectionChanged | Raised when a collection item is selected or selection is canceled. |
| submenuHidden | Raised after a submenu is hidden. |
| submenuHiding | Raised before a submenu is hidden. |
| submenuShowing | Raised before a submenu is displayed. |
| submenuShown | Raised after a submenu is displayed. |
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