jquery-mobile/js/jquery.mobile.forms.select.js

/*
* jQuery Mobile Framework : "selectmenu" plugin
* Copyright (c) jQuery Project
* Dual licensed under the MIT or GPL Version 2 licenses.
* http://jquery.org/license
*/

(function( $, undefined ) {

$.widget( "mobile.selectmenu", $.mobile.widget, {
	options: {
		theme: null,
		disabled: false,
		icon: "arrow-d",
		iconpos: "right",
		inline: null,
		corners: true,
		shadow: true,
		iconshadow: true,
		menuPageTheme: "b",
		overlayTheme: "a",
		hidePlaceholderMenuItems: true,
		closeText: "Close",
		nativeMenu: true,
		initSelector: "select:not(:jqmData(role='slider'))"
	},

	_button: function(){
		return $( "<div/>" );
	},

	_setDisabled: function( value ) {
		this.element.attr( "disabled", value );
		this.button.attr( "aria-disabled", value );
		return this._setOption( "disabled", value );
	},

	_focusButton : function() {
		var self = this;

		setTimeout( function() {
			self.button.focus();
		}, 40);
	},

  _selectOptions: function() {
    return this.select.find( "option" );
  },

	// setup items that are generally necessary for select menu extension
	_preExtension: function(){
		this.select = this.element.wrap( "<div class='ui-select'>" );
		this.selectID  = this.select.attr( "id" );
		this.label = $( "label[for='"+ this.selectID +"']" ).addClass( "ui-select" );
		this.isMultiple = this.select[ 0 ].multiple;
		if ( !this.options.theme ) {
			this.options.theme = $.mobile.getInheritedTheme( this.select, "c" );
		}
	},

	_create: function() {
		this._preExtension();

 		// Allows for extension of the native select for custom selects and other plugins
		// see select.custom for example extension
		// TODO explore plugin registration
		this._trigger( "beforeCreate" );

		this.button = this._button();

		var self = this,

			options = this.options,

			// IE throws an exception at options.item() function when
			// there is no selected item
			// select first in this case
			selectedIndex = this.select[ 0 ].selectedIndex == -1 ? 0 : this.select[ 0 ].selectedIndex,

			// TODO values buttonId and menuId are undefined here
			button = this.button
				.text( $( this.select[ 0 ].options.item( selectedIndex ) ).text() )
				.insertBefore( this.select )
				.buttonMarkup( {
					theme: options.theme,
					icon: options.icon,
					iconpos: options.iconpos,
					inline: options.inline,
					corners: options.corners,
					shadow: options.shadow,
					iconshadow: options.iconshadow
				});

		// Opera does not properly support opacity on select elements
		// In Mini, it hides the element, but not its text
		// On the desktop,it seems to do the opposite
		// for these reasons, using the nativeMenu option results in a full native select in Opera
		if ( options.nativeMenu && window.opera && window.opera.version ) {
			this.select.addClass( "ui-select-nativeonly" );
		}

		// Add counter for multi selects
		if ( this.isMultiple ) {
			this.buttonCount = $( "<span>" )
				.addClass( "ui-li-count ui-btn-up-c ui-btn-corner-all" )
				.hide()
				.appendTo( button.addClass('ui-li-has-count') );
		}

		// Disable if specified
		if ( options.disabled || this.element.attr('disabled')) {
			this.disable();
		}

		// Events on native select
		this.select.change( function() {
			self.refresh();
		});

		this.build();
	},

	build: function() {
		var self = this;

		this.select
			.appendTo( self.button )
			.bind( "vmousedown", function() {
				// Add active class to button
				self.button.addClass( $.mobile.activeBtnClass );
			})
			.bind( "focus vmouseover", function() {
				self.button.trigger( "vmouseover" );
			})
			.bind( "vmousemove", function() {
				// Remove active class on scroll/touchmove
				self.button.removeClass( $.mobile.activeBtnClass );
			})
			.bind( "change blur vmouseout", function() {
				self.button.trigger( "vmouseout" )
					.removeClass( $.mobile.activeBtnClass );
			})
			.bind( "change blur", function() {
				self.button.removeClass( "ui-btn-down-" + self.options.theme );
			});
	},

	selected: function() {
		return this._selectOptions().filter( ":selected" );
	},

	selectedIndices: function() {
		var self = this;

		return this.selected().map( function() {
			return self._selectOptions().index( this );
		}).get();
	},

	setButtonText: function() {
		var self = this, selected = this.selected();

		this.button.find( ".ui-btn-text" ).text( function() {
			if ( !self.isMultiple ) {
				return selected.text();
			}

			return selected.length ? selected.map( function() {
				return $( this ).text();
			}).get().join( ", " ) : self.placeholder;
		});
	},

	setButtonCount: function() {
		var selected = this.selected();

		// multiple count inside button
		if ( this.isMultiple ) {
			this.buttonCount[ selected.length > 1 ? "show" : "hide" ]().text( selected.length );
		}
	},

	refresh: function() {
		this.setButtonText();
		this.setButtonCount();
	},

	// open and close preserved in native selects
	// to simplify users code when looping over selects
	open: $.noop,
	close: $.noop,

	disable: function() {
		this._setDisabled( true );
		this.button.addClass( "ui-disabled" );
	},

	enable: function() {
		this._setDisabled( false );
		this.button.removeClass( "ui-disabled" );
	}
});

//auto self-init widgets
$( document ).bind( "pagecreate create", function( e ){
	$.mobile.selectmenu.prototype.enhanceWithin( e.target );
});
})( jQuery );