jquery-ui/ui/jquery.ui.selectmenu.js

453 lines
11 KiB
JavaScript

/*!
* jQuery UI Selectmenu @VERSION
* http://jqueryui.com
*
* Copyright 2012 jQuery Foundation and other contributors
* Released under the MIT license.
* http://jquery.org/license
*
* http://docs.jquery.com/UI/Selectmenu
*
* Depends:
* jquery.ui.core.js
* jquery.ui.widget.js
* jquery.ui.position.js
* jquery.ui.menu.js
*/
(function( $, undefined ) {
$.widget( "ui.selectmenu", {
version: "@VERSION",
defaultElement: "<select>",
options: {
dropdown: true,
appendTo: "body",
position: {
my: "left top",
at: "left bottom",
collision: "none"
},
// callbacks
open: null,
focus: null,
select: null,
close: null,
change: null
},
_create: function() {
// make / set unique id
var selectmenuId = this.element.uniqueId().attr( "id" );
// array of button and menu id's
this.ids = { id: selectmenuId, button: selectmenuId + "-button", menu: selectmenuId + "-menu" };
this._drawButton();
this._on( this.button, this._buttonEvents );
this._hoverable( this.button );
this._focusable( this.button );
this._drawMenu();
// document click closes menu
this._on( document, {
click: function( event ) {
if ( this.isOpen && !$( event.target ).closest( "li.ui-state-disabled, li.ui-selectmenu-optgroup, #" + this.ids.button ).length ) {
this.close( event );
}
}
});
if ( this.options.disabled ) {
this.disable();
}
},
_drawButton: function() {
var tabindex = this.element.attr( "tabindex" );
// fix existing label
this.label = $( "label[for='" + this.ids.id + "']" ).attr( "for", this.ids.button );
// catch click event of the label
this._on( this.label, {
"click": function( event ) {
this.button.focus();
event.preventDefault();
}
});
// hide original select tag
this.element.hide();
// create button
this.button = $( "<a />", {
"class": "ui-button ui-widget ui-state-default ui-corner-all",
href: "#" + this.ids.id,
tabindex: ( tabindex ? tabindex : this.options.disabled ? -1 : 0 ),
id: this.ids.button,
width: this.element.outerWidth(),
role: "combobox",
"aria-expanded": false,
"aria-autocomplete": "list",
"aria-owns": this.ids.menu,
"aria-haspopup": true
});
this.button.prepend( $( "<span />", {
"class": "ui-icon " + ( ( this.options.dropdown ) ? "ui-icon-triangle-1-s" : "ui-icon-triangle-2-n-s" )
}));
this.buttonText = $( "<span />", {
"class": "ui-selectmenu-text" ,
html: this.element.find( "option:selected" ).text() || "&nbsp;"
})
.appendTo( this.button );
// wrap and insert new button
this.buttonWrap = $( "<span />", {
"class": "ui-selectmenu-button"
})
.append( this.button )
.insertAfter( this.element );
},
_drawMenu: function() {
var menuInstance,
that = this;
// create menu portion, append to body
this.menu = $( "<ul />", {
"aria-hidden": true,
"aria-labelledby": this.ids.button,
id: this.ids.menu
});
// wrap menu
this.menuWrap = $( "<div />", {
"class": "ui-selectmenu-menu",
width: ( this.options.dropdown ) ? this.button.outerWidth() : this.buttonText.width() + parseFloat( this.buttonText.css( "padding-left" ) ) || 0 + parseFloat( this.buttonText.css( "margin-left") ) || 0
})
.append( this.menu )
.appendTo( this.options.appendTo );
// init menu widget
menuInstance = this.menu.menu({
select: function( event, ui ) {
var item = ui.item.data( "ui-selectmenu-item" );
that._select( item, event );
if ( that.isOpen ) {
event.preventDefault();
that.close( event );
}
},
focus: function( event, ui ) {
var item = ui.item.data( "ui-selectmenu-item" );
if ( that.focus !== undefined ) {
if ( item.index !== that.focus ) {
that._trigger( "focus", event, { item: item } );
if ( !that.isOpen ) {
that._select( item, event );
}
}
}
that.focus = item.index;
// Set ARIA active decendent
that.button.attr( "aria-activedescendant", that.menuItems.eq( item.index ).find( "a" ).attr( "id" ) );
},
// set ARIA role
role: "listbox"
})
.data( "ui-menu" );
// change menu styles?
if ( this.options.dropdown ) {
this.menu.addClass( "ui-corner-bottom" ).removeClass( "ui-corner-all" );
}
// make sure focus stays on selected item
menuInstance.delay = 999999999;
// unbind uneeded Menu events
menuInstance._off( this.menu, "mouseleave" );
},
refresh: function() {
this.menu.empty();
var item,
options = this.element.find( "option" );
if ( options.length ) {
this._readOptions( options );
this._renderMenu( this.menu, this.items );
this.menu.menu( "refresh" );
this.menuItems = this.menu.find( "li" ).not( ".ui-selectmenu-optgroup" );
// select current item
item = this._getSelectedItem();
this.menu.menu( "focus", null, item );
this._setSelected( item.data( "ui-selectmenu-item" ) );
// set disabled state
this._setOption( "disabled", this._getCreateOptions().disabled );
}
},
open: function( event ) {
if ( !this.options.disabled ) {
// make sure menu is refreshed on first init (needed at least for IE9)
if ( this.isOpen === undefined ) {
this.button.trigger( "focus" );
}
this.isOpen = true;
this._toggleAttr();
this.menu.menu( "focus", event, this._getSelectedItem() );
if ( this.items && !this.options.dropdown ) {
var currentItem = this._getSelectedItem();
// center current item
if ( this.menu.outerHeight() < this.menu.prop( "scrollHeight" ) ) {
this.menuWrap.css( "left" , -10000 );
this.menu.scrollTop( this.menu.scrollTop() + currentItem.position().top - this.menu.outerHeight() / 2 + currentItem.outerHeight() / 2 );
this.menuWrap.css( "left" , "auto" );
}
$.extend( this.options.position, {
my: "left top" + ( this.menu.offset().top - currentItem.offset().top + ( this.button.outerHeight() - currentItem.outerHeight() ) / 2 ),
at: "left top"
});
}
this.options.position.of = this.button;
this.menuWrap
.zIndex( this.element.zIndex() + 1 )
.position( this.options.position );
this._trigger( "open", event );
}
},
close: function( event ) {
if ( this.isOpen ) {
var id = this._getSelectedItem().find( "a" ).attr( "id" );
this.isOpen = false;
this._toggleAttr();
this.button.attr( "aria-activedescendant", id );
this.menu.attr( "aria-activedescendant", id );
this._trigger( "close", event );
}
},
widget: function() {
return this.button;
},
menuWidget: function() {
return this.menu;
},
_renderMenu: function( ul, items ) {
var that = this,
currentOptgroup = "";
$.each( items, function( index, item ) {
if ( item.optgroup !== currentOptgroup ) {
$( "<li />", {
"class": "ui-selectmenu-optgroup" + ( item.element.parent( "optgroup" ).attr( "disabled" ) ? " ui-state-disabled" : "" ),
html: item.optgroup
}).appendTo( ul );
currentOptgroup = item.optgroup;
}
that._renderItem( ul, item );
});
},
_renderItem: function( ul, item ) {
var li = $( "<li />" ).data( "ui-selectmenu-item", item );
if ( item.disabled ) {
li.addClass( "ui-state-disabled" );
}
li.append( $( "<a />", {
html: item.label,
href: "#"
})
);
return li.appendTo( ul );
},
_move: function( direction, event ) {
if ( direction === "first" || direction === "last" ) {
// set focus manually for first or last item
this.menu.menu( "focus", event, this.menuItems[ direction ]() );
} else {
// move to and focus next or prev item
this.menu.menu( direction, event );
}
},
_getSelectedItem: function() {
return this.menuItems.eq( this.element[ 0 ].selectedIndex );
},
_toggle: function( event ) {
if ( this.isOpen ) {
this.close( event );
} else {
this.open( event );
}
},
_buttonEvents: {
focus: function() {
// init Menu on first focus
this.refresh();
// reset focus class as its removed by ui.widget._setOption
this.button.addClass( "ui-state-focus" );
this._off( this.button, "focus" );
},
click: function( event ) {
this._toggle( event );
event.preventDefault();
},
keydown: function( event ) {
var prevDef = true;
switch ( event.keyCode ) {
case $.ui.keyCode.TAB:
case $.ui.keyCode.ESCAPE:
if ( this.isOpen ) {
this.close( event );
}
prevDef = false;
break;
case $.ui.keyCode.ENTER:
if ( this.isOpen ) {
this.menu.menu( "select", event );
}
break;
case $.ui.keyCode.UP:
if ( event.altKey ) {
this._toggle( event );
} else {
this._move( "previous", event );
}
break;
case $.ui.keyCode.DOWN:
if ( event.altKey ) {
this._toggle( event );
} else {
this._move( "next", event );
}
break;
case $.ui.keyCode.SPACE:
this._toggle( event );
break;
case $.ui.keyCode.LEFT:
this._move( "previous", event );
break;
case $.ui.keyCode.RIGHT:
this._move( "next", event );
break;
case $.ui.keyCode.HOME:
case $.ui.keyCode.PAGE_UP:
this._move( "first", event );
break;
case $.ui.keyCode.END:
case $.ui.keyCode.PAGE_DOWN:
this._move( "last", event );
break;
default:
this.menu.trigger( event );
prevDef = false;
}
if ( prevDef ) {
event.preventDefault();
}
}
},
_select: function( item, event ) {
var oldIndex = this.element[ 0 ].selectedIndex;
// change native select element
this.element[ 0 ].selectedIndex = item.index;
this._setSelected( item );
this._trigger( "select", event, { item: item } );
if ( item.index !== oldIndex ) {
this._trigger( "change", event, { item: item } );
}
},
_setSelected: function( item ) {
// update button text
this.buttonText.html( item.label );
// change ARIA attr
this.menuItems.find( "a" ).attr( "aria-selected", false );
this._getSelectedItem().find( "a" ).attr( "aria-selected", true );
this.button.attr( "aria-labelledby", this.menuItems.eq( item.index ).find( "a" ).attr( "id" ) );
},
_setOption: function( key, value ) {
this._super( key, value );
if ( key === "appendTo" ) {
this.menuWrap.appendTo( $( value || "body", this.element[ 0 ].ownerDocument )[ 0 ] );
}
if ( key === "disabled" ) {
this.menu.menu( "option", "disabled", value );
if ( value ) {
this.element.attr( "disabled", "disabled" );
this.button.attr( "tabindex", -1 );
this.close();
} else {
this.element.removeAttr( "disabled" );
this.button.attr( "tabindex", 0 );
}
}
},
_toggleAttr: function(){
if ( this.options.dropdown ) {
this.button.toggleClass( "ui-corner-top", this.isOpen ).toggleClass( "ui-corner-all", !this.isOpen );
}
this.menuWrap.toggleClass( "ui-selectmenu-open", this.isOpen );
this.menu.attr( "aria-hidden", !this.isOpen);
this.button.attr( "aria-expanded", this.isOpen);
},
_getCreateOptions: function() {
return { disabled: !!this.element.attr( "disabled" ) };
},
_readOptions: function( options ) {
var data = [];
$.each( options, function( index, item ) {
var option = $( item ),
optgroup = option.parent( "optgroup" );
data.push({
element: option,
index: index,
value: option.attr( "value" ),
label: option.text() || "&nbsp;",
optgroup: optgroup.attr( "label" ) || "",
disabled: optgroup.attr( "disabled" ) || option.attr( "disabled" )
});
});
this.items = data;
},
_destroy: function() {
this.menuWrap.remove();
this.buttonWrap.remove();
this.element.show();
this.element.removeUniqueId();
this.label.attr( "for", this.ids.id );
}
});
}( jQuery ));