Selectmenu Widget

Categories: Widgets

Selectmenu Widgetversion added: 1.11

Description: Duplicates and extends the functionality of a native HTML select element to overcome the limitations of the native control.

QuickNavExamples

Options

Methods


Extension Points

Events

Selectmenu transforms a <select> element into a themeable and customizable control. The widget acts as a proxy to the original <select>; therefore the original element's state is maintained for form submission and serialization.

Selectmenu supports <optgroup> elements and custom markup to render specific presentations like multiple lines. The <select> and its options can be disabled by adding a disabled attribute.

Note: Support for accesskey on custom elements is extremely limited in browsers. As such, if there is an accesskey attribute on the <select> element, it will not work with the custom selectmenu. If there is an accesskey attribute on any of the <option> elements, using the accesskey may cause the original element and the custom element to be out of sync. However, most browsers don't support accesskey on <option> elements.

Keyboard interaction

When the menu is open, the following key commands are available:

  • UP/LEFT: Move focus to the previous item.
  • DOWN/RIGHT: Move focus to the next item.
  • END/PAGE DOWN: Move focus to the last item.
  • HOME/PAGE UP: Move focus to the first item.
  • ESCAPE: Close the menu.
  • ENTER/SPACE: Select the currently focused item and close the menu.
  • ALT/OPTION + UP/DOWN: Toggle the visibility of the menu.

When the menu is closed, the following key commands are available:

  • UP/LEFT: Select the previous item.
  • DOWN/RIGHT: Select the next item.
  • END/PAGE DOWN: Select the last item.
  • HOME/PAGE UP: Select the first item.
  • ALT/OPTION + UP/DOWN: Toggle the visibility of the menu.
  • SPACE: Open the menu.

Additional Notes:

  • This widget requires some functional CSS, otherwise it won't work. If you build a custom theme, use the widget's specific CSS file as a starting point.

Options

appendTo 

Type: Selector
Default: null
Which element to append the menu to. When the value is null, the parents of the <select> are checked for a class name of ui-front. If an element with the ui-front class name is found, the menu is appended to that element. Regardless of the value, if no element is found, the menu is appended to the body.
Code examples:

Initialize the selectmenu with the appendTo option specified:

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$( ".selector" ).selectmenu({
  appendTo: "#someElem"
});

Get or set the appendTo option, after initialization:

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// Getter
var appendTo = $( ".selector" ).selectmenu( "option", "appendTo" );
 
// Setter
$( ".selector" ).selectmenu( "option", "appendTo", "#someElem" );

disabled 

Type: Boolean
Default: false
Disables the selectmenu if set to true.
Code examples:

Initialize the selectmenu with the disabled option specified:

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$( ".selector" ).selectmenu({
  disabled: true
});

Get or set the disabled option, after initialization:

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// Getter
var disabled = $( ".selector" ).selectmenu( "option", "disabled" );
 
// Setter
$( ".selector" ).selectmenu( "option", "disabled", true );

icons 

Type: Object
Default: { button: "ui-icon-triangle-1-s" }
Icons to use for the button, matching an icon defined by the jQuery UI CSS Framework.
  • button (string, default: "ui-icon-triangle-1-s")
Code examples:

Initialize the selectmenu with the icons option specified:

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$( ".selector" ).selectmenu({
  icons: { button: "ui-icon-circle-triangle-s" }
});

Get or set the icons option, after initialization:

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// Getter
var icons = $( ".selector" ).selectmenu( "option", "icons" );
 
// Setter
$( ".selector" ).selectmenu( "option", "icons", { button: "ui-icon-circle-triangle-s" } );

position 

Type: Object
Default: { my: "left top", at: "left bottom", collision: "none" }
Identifies the position of the menu in relation to the associated button element. You can refer to the jQuery UI Position utility for more details about the various options.
Code examples:

Initialize the selectmenu with the position option specified:

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$( ".selector" ).selectmenu({
  position: { my : "left+10 center", at: "right center" }
});

Get or set the position option, after initialization:

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// Getter
var position = $( ".selector" ).selectmenu( "option", "position" );
 
// Setter
$( ".selector" ).selectmenu( "option", "position", { my : "left+10 center", at: "right center" } );

width 

Type: Number
Default: null
The width of the menu, in pixels. When the value is null, the width of the native select is used.
Code examples:

Initialize the selectmenu with the width option specified:

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$( ".selector" ).selectmenu({
  width: 200
});

Get or set the width option, after initialization:

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// Getter
var width = $( ".selector" ).selectmenu( "option", "width" );
 
// Setter
$( ".selector" ).selectmenu( "option", "width", 200 );

Methods

close()Returns: jQuery (plugin only)

Closes the menu.
  • This method does not accept any arguments.
Code examples:

Invoke the close method:

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$( ".selector" ).selectmenu( "close" );

destroy()Returns: jQuery (plugin only)

Removes the selectmenu functionality completely. This will return the element back to its pre-init state.
  • This method does not accept any arguments.
Code examples:

Invoke the destroy method:

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$( ".selector" ).selectmenu( "destroy" );

disable()Returns: jQuery (plugin only)

Disables the selectmenu.
  • This method does not accept any arguments.
Code examples:

Invoke the disable method:

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$( ".selector" ).selectmenu( "disable" );

enable()Returns: jQuery (plugin only)

Enables the selectmenu.
  • This method does not accept any arguments.
Code examples:

Invoke the enable method:

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$( ".selector" ).selectmenu( "enable" );

instance()Returns: Object

Retrieves the selectmenu's instance object. If the element does not have an associated instance, undefined is returned.

Unlike other widget methods, instance() is safe to call on any element after the selectmenu plugin has loaded.

  • This method does not accept any arguments.
Code examples:

Invoke the instance method:

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$( ".selector" ).selectmenu( "instance" );

menuWidget()Returns: jQuery (plugin only)

Returns a jQuery object containing the menu element.
  • This method does not accept any arguments.
Code examples:

Invoke the menuWidget method:

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$( ".selector" ).selectmenu( "menuWidget" );

open()Returns: jQuery (plugin only)

Opens the menu.
  • This method does not accept any arguments.
Code examples:

Invoke the open method:

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$( ".selector" ).selectmenu( "open" );

option( optionName )Returns: Object

Gets the value currently associated with the specified optionName.

Note: For options that have objects as their value, you can get the value of a specific key by using dot notation. For example, "foo.bar" would get the value of the bar property on the foo option.

  • optionName
    Type: String
    The name of the option to get.
Code examples:

Invoke the method:

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var isDisabled = $( ".selector" ).selectmenu( "option", "disabled" );

option()Returns: PlainObject

Gets an object containing key/value pairs representing the current selectmenu options hash.
  • This signature does not accept any arguments.
Code examples:

Invoke the method:

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var options = $( ".selector" ).selectmenu( "option" );

option( optionName, value )Returns: jQuery (plugin only)

Sets the value of the selectmenu option associated with the specified optionName.

Note: For options that have objects as their value, you can set the value of just one property by using dot notation for optionName. For example, "foo.bar" would update only the bar property of the foo option.

  • optionName
    Type: String
    The name of the option to set.
  • value
    Type: Object
    A value to set for the option.
Code examples:

Invoke the method:

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$( ".selector" ).selectmenu( "option", "disabled", true );

option( options )Returns: jQuery (plugin only)

Sets one or more options for the selectmenu.
  • options
    Type: Object
    A map of option-value pairs to set.
Code examples:

Invoke the method:

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$( ".selector" ).selectmenu( "option", { disabled: true } );

refresh()Returns: jQuery (plugin only)

Parses the original element and re-renders the menu. Processes any <option> or <optgroup> elements that were added, removed or disabled.
  • This method does not accept any arguments.
Code examples:

Invoke the refresh method:

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$( ".selector" ).selectmenu( "refresh" );

widget()Returns: jQuery (plugin only)

Returns a jQuery object containing the button element.
  • This method does not accept any arguments.
Code examples:

Invoke the widget method:

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$( ".selector" ).selectmenu( "widget" );

Extension Points

The selectmenu widget is built with the widget factory and can be extended. When extending widgets, you have the ability to override or add to the behavior of existing methods. The following methods are provided as extension points with the same API stability as the plugin methods listed above. For more information on widget extensions, see Extending Widgets with the Widget Factory.

_renderItem( ul, item )Returns: jQuery

Method that controls the creation of each option in the widget's menu. The method must create a new <li> element, append it to the menu, and return it.

  • ul
    Type: jQuery
    The <ul> element that the newly created <li> element must be appended to.
  • item
    Type: Object
    • element
      Type: jQuery
      The original <option> element.
    • index
      Type: Integer
      The index of the <option> within the <select>.
    • value
      Type: String
      The value of the <option>.
    • label
      Type: String
      The label of the <option>.
    • optgroup
      Type: String
      The label for the parent optgroup, if any.
    • disabled
      Type: Boolean
      Whether the <option> is disabled.
Code examples:

Style the menu item background colors based on the value of their corresponding option elements.

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_renderItem: function( ul, item ) {
  var li = $( "<li>" )
    .css( "background-color", item.value );
 
  if ( item.disabled ) {
    li.addClass( "ui-state-disabled" );
  }
 
  this._setText( li, item.label );
 
  return li.appendTo( ul );
}

_renderMenu( ul, items )Returns: jQuery (plugin only)

Method that controls building the widget's menu. The method is passed an empty <ul> and an array of items based on the <option> elements in the original <select>. Creation of the individual <li> elements should be delegated to _renderItemData(), which in turn delegates to the _renderItem() extension point.
  • ul
    Type: jQuery
    An empty <ul> element to use as the widget's menu.
  • items
    Type: Array
    An array of items based on the <option> elements in the original <select>. See the _renderItem() extension point for details on the format of the item objects.
Code examples:

Add a CSS class name to the odd menu items.

Note: For simplicity, this example does not support optgroups or disabled menu items.

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_renderMenu: function( ul, items ) {
  var that = this;
  $.each( items, function( index, item ) {
    that._renderItemData( ul, item );
  });
  $( ul ).find( "li:odd" ).addClass( "odd" );
}

_resizeMenu()Returns: jQuery (plugin only)

Method responsible for sizing the menu before it is displayed. The menu element is available at this.menu.
  • This method does not accept any arguments.
Code examples:

Always display the menu as 500 pixels wide.

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_resizeMenu: function() {
  this.menu.outerWidth( 500 );
}

Events

change( event, ui )Type: selectmenuchange

Triggered when the selected item has changed. Not every select event will fire a change event.
Code examples:

Initialize the selectmenu with the change callback specified:

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$( ".selector" ).selectmenu({
  change: function( event, ui ) {}
});

Bind an event listener to the selectmenuchange event:

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$( ".selector" ).on( "selectmenuchange", function( event, ui ) {} );

close( event )Type: selectmenuclose

Triggered when the menu is hidden.

Note: The ui object is empty but included for consistency with other events.

Code examples:

Initialize the selectmenu with the close callback specified:

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$( ".selector" ).selectmenu({
  close: function( event, ui ) {}
});

Bind an event listener to the selectmenuclose event:

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$( ".selector" ).on( "selectmenuclose", function( event, ui ) {} );

create( event, ui )Type: selectmenucreate

Triggered when the selectmenu is created.

Note: The ui object is empty but included for consistency with other events.

Code examples:

Initialize the selectmenu with the create callback specified:

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$( ".selector" ).selectmenu({
  create: function( event, ui ) {}
});

Bind an event listener to the selectmenucreate event:

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$( ".selector" ).on( "selectmenucreate", function( event, ui ) {} );

focus( event, ui )Type: selectmenufocus

Triggered when an items gains focus.
Code examples:

Initialize the selectmenu with the focus callback specified:

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$( ".selector" ).selectmenu({
  focus: function( event, ui ) {}
});

Bind an event listener to the selectmenufocus event:

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$( ".selector" ).on( "selectmenufocus", function( event, ui ) {} );

open( event )Type: selectmenuopen

Triggered when the menu is opened.

Note: The ui object is empty but included for consistency with other events.

Code examples:

Initialize the selectmenu with the open callback specified:

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$( ".selector" ).selectmenu({
  open: function( event, ui ) {}
});

Bind an event listener to the selectmenuopen event:

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$( ".selector" ).on( "selectmenuopen", function( event, ui ) {} );

select( event, ui )Type: selectmenuselect

Triggered when a menu item is selected.
Code examples:

Initialize the selectmenu with the select callback specified:

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$( ".selector" ).selectmenu({
  select: function( event, ui ) {}
});

Bind an event listener to the selectmenuselect event:

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$( ".selector" ).on( "selectmenuselect", function( event, ui ) {} );

Examples:

A simple jQuery UI Selectmenu

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<!doctype html>
<html lang="en">
<head>
  <meta charset="utf-8">
  <title>selectmenu demo</title>
  <link rel="stylesheet" href="//code.jquery.com/ui/1.11.4/themes/smoothness/jquery-ui.css">
  <style>
  label { display: block; }
  select { width: 200px; }
  </style>
  <script src="//code.jquery.com/jquery-1.10.2.js"></script>
  <script src="//code.jquery.com/ui/1.11.4/jquery-ui.js"></script>
</head>
<body>
 
<label for="speed">Select a speed:</label>
<select name="speed" id="speed">
  <option value="Slower">Slower</option>
  <option value="Slow">Slow</option>
  <option value="Medium" selected>Medium</option>
  <option value="Fast">Fast</option>
  <option value="Faster">Faster</option>
</select>
 
<script>
$( "#speed" ).selectmenu();
</script>
 
</body>
</html>

Demo:

A simple jQuery UI Selectmenu with optgroups

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<!doctype html>
<html lang="en">
<head>
  <meta charset="utf-8">
  <title>selectmenu demo</title>
  <link rel="stylesheet" href="//code.jquery.com/ui/1.11.4/themes/smoothness/jquery-ui.css">
  <style>
  label { display: block; }
  select { width: 200px; }
  </style>
  <script src="//code.jquery.com/jquery-1.10.2.js"></script>
  <script src="//code.jquery.com/ui/1.11.4/jquery-ui.js"></script>
</head>
<body>
 
<label for="files">Select a file:</label>
<select name="files" id="files">
  <optgroup label="Scripts">
    <option value="jquery">jQuery.js</option>
    <option value="jqueryui">ui.jQuery.js</option>
  </optgroup>
  <optgroup label="Other files">
    <option value="somefile">Some unknown file</option>
    <option value="someotherfile">Some other file</option>
  </optgroup>
</select>
 
<script>
$( "#files" ).selectmenu();
</script>
 
</body>
</html>

Demo:

A jQuery UI Selectmenu with overflow

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<!doctype html>
<html lang="en">
<head>
  <meta charset="utf-8">
  <title>selectmenu demo</title>
  <link rel="stylesheet" href="//code.jquery.com/ui/1.11.4/themes/smoothness/jquery-ui.css">
  <style>
  label { display: block; }
  select { width: 200px; }
  .overflow { height: 200px; }
  </style>
  <script src="//code.jquery.com/jquery-1.10.2.js"></script>
  <script src="//code.jquery.com/ui/1.11.4/jquery-ui.js"></script>
</head>
<body>
 
<label for="number">Select a number:</label>
<select name="number" id="number">
  <option value="1">1</option>
  <option value="2" selected>2</option>
  <option value="3">3</option>
  <option value="4">4</option>
  <option value="5">5</option>
  <option value="6">6</option>
  <option value="7">7</option>
  <option value="8">8</option>
  <option value="9">9</option>
  <option value="10">10</option>
  <option value="11">11</option>
  <option value="12">12</option>
  <option value="13">13</option>
  <option value="14">14</option>
  <option value="15">15</option>
  <option value="16">16</option>
  <option value="17">17</option>
  <option value="18">18</option>
  <option value="19">19</option>
</select>
 
<script>
$( "#number" )
  .selectmenu()
  .selectmenu( "menuWidget" )
    .addClass( "overflow" );
</script>
 
</body>
</html>

Demo: