mirror of
https://github.com/jquery/jquery-ui.git
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1005 lines
23 KiB
JavaScript
1005 lines
23 KiB
JavaScript
/*!
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* jQuery UI Draggable @VERSION
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* http://jqueryui.com
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*
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* Copyright 2012 jQuery Foundation and other contributors
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* Dual licensed under the MIT or GPL Version 2 licenses.
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* http://jquery.org/license
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*
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* http://docs.jquery.com/UI/Draggable
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*
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* Depends:
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* jquery.ui.core.js
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* jquery.ui.interaction.js
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* jquery.ui.widget.js
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*/
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(function( $, undefined ) {
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// create a shallow copy of an object
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function copy( obj ) {
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var prop,
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ret = {};
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for ( prop in obj ) {
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ret[ prop ] = obj[ prop ];
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}
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return ret;
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}
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$.widget( "ui.draggable", $.ui.interaction, {
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version: "@VERSION",
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widgetEventPrefix: "drag",
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options: {
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appendTo: null,
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exclude: "input,textarea,button,select,option",
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handle: null,
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helper: false
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},
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// dragEl: element being dragged (original or helper)
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// position: final CSS position of dragEl
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// offset: offset of dragEl
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// originalPosition: CSS position before drag start
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// originalOffset: offset before drag start
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// originalPointer: pageX/Y at drag start (offset of pointer)
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// startPosition: CSS position at drag start (after beforeStart)
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// startOffset: offset at drag start (after beforeStart)
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// tempPosition: overridable CSS position of dragEl
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// overflowOffset: offset of scroll parent
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// overflow: object containing width and height keys of scroll parent
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// domPosition: object containing original parent and index when using
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// appendTo option without a helper
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_create: function() {
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this._super();
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this.scrollSensitivity = 20;
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this.scrollSpeed = 5;
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// Static position elements can't be moved with top/left
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if ( this.element.css( "position" ) === "static" ) {
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this.element.css( "position", "relative" );
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}
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this.element.addClass( "ui-draggable" );
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},
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/** interaction interface **/
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_isValidTarget: function( element ) {
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var handle = this.options.handle ? element.is( this.options.handle ) : true,
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exclude = this.options.exclude ? element.is( this.options.exclude ) : false;
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return ( handle && !exclude );
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},
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_start: function( event, pointerPosition ) {
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var offset, startCssLeft, startCssTop, startPosition, startOffset;
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// The actual dragging element, should always be a jQuery object
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this.dragEl = ( this.options.helper === true || typeof this.options.helper === 'function' ) ?
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this._createHelper( pointerPosition ) :
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this.element;
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// _createHelper() ensures that helpers are in the correct position
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// in the DOM, but we need to handle appendTo when there is no helper
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if ( this.options.appendTo && this.dragEl === this.element ) {
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this.domPosition = {
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parent: this.element.parent(),
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index: this.element.index()
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};
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offset = this.dragEl.offset();
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this.dragEl
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.appendTo( this._appendToEl() )
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.offset( offset );
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}
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this.cssPosition = this.dragEl.css( "position" );
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this.scrollParent = this.element.scrollParent();
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// Cache starting positions
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this.originalPosition = this.startPosition = this._getPosition();
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this.originalOffset = this.startOffset = this.dragEl.offset();
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this.originalPointer = pointerPosition;
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// Cache current position and offset
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this.position = copy( this.startPosition );
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this.offset = copy( this.startOffset );
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// Cache the offset of scrollParent, if required for _handleScrolling
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if ( this.scrollParent[0] !== this.document[0] && this.scrollParent[0].tagName !== "HTML" ) {
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this.overflowOffset = this.scrollParent.offset();
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}
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this.overflow = {
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height: this.scrollParent[0] === this.document[0] ?
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this.window.height() : this.scrollParent.height(),
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width: this.scrollParent[0] === this.document[0] ?
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this.window.width() : this.scrollParent.width()
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};
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this._preparePosition( pointerPosition );
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// If user cancels beforeStart, don't allow dragging
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if ( this._trigger( "beforeStart", event,
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this._originalHash( pointerPosition ) ) === false ) {
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// domPosition needs to be undone even if beforeStart is stopped
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// Otherwise this.dragEl will remain in the element appendTo is set to
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this._resetDomPosition();
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return false;
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}
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// Save off the usual properties locally, so they can be reverted from start
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startCssLeft = this.dragEl.css("left");
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startCssTop = this.dragEl.css("top");
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startPosition = copy( this._getPosition() );
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startOffset = copy( this.offset );
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this._setCss();
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this.startPosition = this._getPosition();
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this.startOffset = this.dragEl.offset();
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// If user cancels on start, don't allow dragging
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if ( this._trigger( "start", event,
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this._fullHash( pointerPosition ) ) === false ) {
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// domPosition needs to be undone even if start is stopped
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// Otherwise this.dragEl will remain in the element appendTo is set to
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this.startPosition = startPosition;
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this.startOffset = startOffset;
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this.dragEl.css({
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left: startCssLeft,
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top: startCssTop
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});
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this._resetDomPosition();
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return false;
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}
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this._blockFrames();
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},
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_resetDomPosition: function() {
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// Nothing to do in this case
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if ( !this.domPosition ) {
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return;
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}
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var parent = this.domPosition.parent,
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next = parent.children().eq( this.domPosition.index );
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if ( next.length ) {
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next.before( this.element );
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} else {
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parent.append( this.element );
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}
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this.element.offset( this.offset );
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this.domPosition = null;
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},
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_move: function( event, pointerPosition ) {
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this._preparePosition( pointerPosition );
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// If user cancels drag, don't move the element
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if ( this._trigger( "drag", event, this._fullHash( pointerPosition ) ) === false ) {
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return false;
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}
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this._setCss();
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// Scroll the scrollParent, if needed
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this._handleScrolling( pointerPosition );
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},
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_stop: function( event, pointerPosition ) {
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this._preparePosition( pointerPosition );
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// If user cancels stop, leave helper there
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if ( this._trigger( "stop", event, this._fullHash( pointerPosition ) ) !== false ) {
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if ( this.options.helper ) {
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this.dragEl.remove();
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}
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this._resetDomPosition();
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}
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this._unblockFrames();
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},
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/** internal **/
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_createHelper: function( pointerPosition ) {
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var helper,
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offset = this.element.offset(),
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xPos = (pointerPosition.x - offset.left) / this.element.outerWidth(),
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yPos = (pointerPosition.y - offset.top) / this.element.outerHeight();
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// clone
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if ( this.options.helper === true ) {
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helper = this.element.clone()
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.removeAttr( "id" )
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.find( "[id]" )
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.removeAttr( "id" )
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.end();
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} else {
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// TODO: figure out the signature for this; see #4957
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helper = $( this.options.helper() );
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}
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// Ensure the helper is in the DOM; obey the appendTo option if it exists
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if ( this.options.appendTo || !helper.closest( "body" ).length ) {
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helper.appendTo( this._appendToEl() || this.document[0].body );
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}
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return helper
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// Helper must be absolute to function properly
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.css( "position", "absolute" )
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.offset({
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left: pointerPosition.x - helper.outerWidth() * xPos,
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top: pointerPosition.y - helper.outerHeight() * yPos
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});
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},
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// TODO: Remove after 2.0, only used for backCompat
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_appendToEl: function() {
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return this.options.appendTo;
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},
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_getPosition: function() {
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var left, top, position,
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scrollTop = this.scrollParent.scrollTop(),
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scrollLeft = this.scrollParent.scrollLeft();
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// If fixed or absolute
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if ( this.cssPosition !== "relative" ) {
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position = this.dragEl.position();
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// Take into account scrollbar
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position.top -= scrollTop;
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position.left -= scrollLeft;
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return position;
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}
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// When using relative, css values are checked
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// Otherwise the position wouldn't account for padding on ancestors
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left = this.dragEl.css( "left" );
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top = this.dragEl.css( "top" );
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// Webkit will give back auto if there is no explicit value
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left = ( left === "auto" ) ? 0: parseInt( left, 10 );
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top = ( top === "auto" ) ? 0: parseInt( top, 10 );
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return {
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left: left - scrollLeft,
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top: top - scrollTop
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};
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},
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_handleScrolling: function( pointerPosition ) {
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var scrollTop = this.scrollParent.scrollTop(),
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scrollLeft = this.scrollParent.scrollLeft(),
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scrollSensitivity = this.scrollSensitivity,
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// overflowOffset is only set when scrollParent is not doc/html
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overflowLeft = this.overflowOffset ?
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this.overflowOffset.left :
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scrollLeft,
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overflowTop = this.overflowOffset ?
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this.overflowOffset.top :
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scrollTop,
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xRight = this.overflow.width + overflowLeft - pointerPosition.x,
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xLeft = pointerPosition.x- overflowLeft,
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yBottom = this.overflow.height + overflowTop - pointerPosition.y,
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yTop = pointerPosition.y - overflowTop;
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// Handle vertical scrolling
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if ( yBottom < scrollSensitivity ) {
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this.scrollParent.scrollTop( scrollTop +
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this._speed( scrollSensitivity - yBottom ) );
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} else if ( yTop < scrollSensitivity ) {
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this.scrollParent.scrollTop( scrollTop -
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this._speed( scrollSensitivity - yTop ) );
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}
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// Handle horizontal scrolling
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if ( xRight < scrollSensitivity ) {
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this.scrollParent.scrollLeft( scrollLeft +
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this._speed( scrollSensitivity - xRight ) );
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} else if ( xLeft < scrollSensitivity ) {
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this.scrollParent.scrollLeft( scrollLeft -
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this._speed( scrollSensitivity - xLeft ) );
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}
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},
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_speed: function( distance ) {
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return this.scrollSpeed + Math.round( distance / 2 );
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},
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// Uses event to determine new position of draggable, before any override from callbacks
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// TODO: handle absolute element inside relative parent like a relative element
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_preparePosition: function( pointerPosition ) {
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var leftDiff = pointerPosition.x - this.originalPointer.x,
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topDiff = pointerPosition.y - this.originalPointer.y,
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newLeft = leftDiff + this.startPosition.left,
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newTop = topDiff + this.startPosition.top;
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// Save off new values for .css() in various callbacks using this function
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this.position = {
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left: newLeft,
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top: newTop
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};
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// Save off values to compare user override against automatic coordinates
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this.tempPosition = {
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left: newLeft,
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top: newTop
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};
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// Refresh offset cache with new positions
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this.offset.left = this.startOffset.left + leftDiff;
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this.offset.top = this.startOffset.top + topDiff;
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},
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// Places draggable where event, or user via event/callback, indicates
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_setCss: function() {
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var newLeft = this.position.left,
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newTop = this.position.top;
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// User overriding left/top so shortcut math is no longer valid
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if ( this.tempPosition.left !== this.position.left ||
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this.tempPosition.top !== this.position.top ) {
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// Reset offset based on difference of expected and overridden values
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this.offset.left += newLeft - this.tempPosition.left;
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this.offset.top += newTop - this.tempPosition.top;
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}
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// TODO: does this work with nested scrollable parents?
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if ( this.cssPosition !== "fixed" ) {
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newLeft += this.scrollParent.scrollLeft();
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newTop += this.scrollParent.scrollTop();
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}
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this.dragEl.css({
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left: newLeft,
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top: newTop
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});
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},
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_originalHash: function( pointerPosition ) {
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var ret = {
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position: this.position,
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offset: copy( this.offset ),
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pointer: copy( pointerPosition )
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};
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if ( this.options.helper ) {
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ret.helper = this.dragEl;
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}
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return ret;
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},
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_fullHash: function( pointerPosition ) {
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return $.extend( this._originalHash( pointerPosition ), {
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originalPosition: copy( this.originalPosition ),
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originalOffset: copy( this.originalOffset ),
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originalPointer: copy( this.originalPointer )
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});
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},
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_blockFrames: function() {
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this.iframeBlocks = this.document.find( "iframe" ).map(function() {
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var iframe = $( this ),
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iframeOffset = iframe.offset();
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return $( "<div>" )
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.css({
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position: "absolute",
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width: iframe.outerWidth(),
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height: iframe.outerHeight(),
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top: iframeOffset.top,
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left: iframeOffset.left
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})
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.appendTo( iframe.parent() )[0];
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});
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},
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_unblockFrames: function() {
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if ( this.iframeBlocks ) {
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this.iframeBlocks.remove();
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delete this.iframeBlocks;
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}
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},
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_destroy: function() {
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this.element.removeClass( "ui-draggable" );
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this._super();
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}
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});
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$.widget( "ui.draggable", $.ui.draggable, {
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// $.widget doesn't know how to handle redefinitions with a custom prefix
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// custom prefixes are going away anyway, so it's not worth fixing right now
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widgetEventPrefix: "drag",
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options: {
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containment: null
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},
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_create: function() {
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this._super();
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this._on({
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dragstart: "_setContainment",
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drag: "_contain"
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});
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},
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_setContainment: function( event, ui ) {
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var offset, left, top,
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container = this._getContainer();
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if ( !container ) {
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this.containment = null;
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return;
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}
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offset = container.offset();
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left = offset.left +
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(parseFloat( $.css( container[0], "borderLeftWidth", true ) ) || 0) +
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(parseFloat( $.css( container[0], "paddingLeft", true ) ) || 0);
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top = offset.top +
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(parseFloat( $.css( container[0], "borderTopWidth", true ) ) || 0) +
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(parseFloat( $.css( container[0], "paddingTop", true ) ) || 0);
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this.containment = {
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left: left,
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top: top,
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right: left + container.width(),
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bottom: top + container.height(),
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leftDiff: ui.originalOffset.left - ui.originalPosition.left,
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topDiff: ui.originalOffset.top - ui.originalPosition.top,
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width: this.dragEl.outerWidth(),
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height: this.dragEl.outerHeight()
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};
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},
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_contain: function( event, ui ) {
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var containment = this.containment;
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if ( !containment ) {
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return;
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}
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ui.position.left = Math.max( ui.position.left,
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containment.left - containment.leftDiff );
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ui.position.left = Math.min( ui.position.left,
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containment.right - containment.width - containment.leftDiff );
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ui.position.top = Math.max( ui.position.top,
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containment.top - containment.topDiff );
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ui.position.top = Math.min( ui.position.top,
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containment.bottom - containment.height - containment.topDiff );
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},
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_getContainer: function() {
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var container,
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containment = this.options.containment;
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if ( !containment ) {
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container = null;
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} else if ( containment === "parent" ) {
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container = this.element.parent();
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} else {
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container = $( containment );
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if ( !container.length ) {
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container = null;
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}
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}
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return container;
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}
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});
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})( jQuery );
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// DEPRECATED
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if ( $.uiBackCompat !== false ) {
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// appendTo 'parent' value
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$.widget( "ui.draggable", $.ui.draggable, {
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_appendToEl: function() {
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var el = this.options.appendTo;
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if ( el === 'parent' ) {
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el = this.dragEl.parent();
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}
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return el;
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}
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});
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// helper 'original' or 'clone' value
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$.widget( "ui.draggable", $.ui.draggable, {
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_create: function() {
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this._super();
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if ( this.options.helper === 'original' ) {
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this.options.helper = false;
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}
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if ( this.options.helper === 'clone' ) {
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this.options.helper = true;
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}
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},
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_setOption: function( key, value ) {
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if ( key !== 'helper' ) {
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return this._super( key, value );
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}
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if ( value === 'clone' ) {
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value = true;
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}
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if ( value === 'original' ) {
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value = false;
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}
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this._super( key, value );
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}
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});
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// axis option
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$.widget( "ui.draggable", $.ui.draggable, {
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options: {
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axis: false
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},
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_create: function() {
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var self = this;
|
|
|
|
this._super();
|
|
|
|
// On drag, make sure top does not change so axis is locked
|
|
this.element.on( "drag", function( event, ui ) {
|
|
|
|
if ( self.options.axis === "x" ) {
|
|
ui.position.top = ui.originalPosition.top;
|
|
}
|
|
|
|
if ( self.options.axis === "y" ) {
|
|
ui.position.left = ui.originalPosition.left;
|
|
}
|
|
|
|
});
|
|
|
|
}
|
|
|
|
});
|
|
|
|
// cancel option
|
|
$.widget( "ui.draggable", $.ui.draggable, {
|
|
options: {
|
|
cancel: null
|
|
},
|
|
|
|
_create: function() {
|
|
|
|
this._super();
|
|
|
|
if ( this.options.cancel !== null ) {
|
|
this.options.exclude = this.options.cancel;
|
|
}
|
|
|
|
},
|
|
|
|
_setOption: function( key, value ) {
|
|
|
|
if ( key !== 'cancel' ) {
|
|
return this._super( key, value );
|
|
}
|
|
|
|
this._super( key, value );
|
|
this.options.exclude = this.options.cancel;
|
|
|
|
}
|
|
|
|
});
|
|
|
|
// cursor option
|
|
$.widget( "ui.draggable", $.ui.draggable, {
|
|
options: {
|
|
cursor: "auto"
|
|
},
|
|
|
|
_create: function() {
|
|
|
|
var startCursor, self, body;
|
|
|
|
this._super();
|
|
|
|
self = this;
|
|
body = $( this.document[0].body );
|
|
|
|
// Cache original cursor to set back
|
|
this.element.on( "dragbeforestart", function() {
|
|
|
|
if ( self.options.cursor ) {
|
|
startCursor = body[0].style.cursor;
|
|
body.css( "cursor", self.options.cursor );
|
|
}
|
|
|
|
});
|
|
|
|
// Set back cursor to whatever default was
|
|
this.element.on( "dragstop", function() {
|
|
|
|
if ( self.options.cursor ) {
|
|
body.css( "cursor", startCursor );
|
|
}
|
|
|
|
});
|
|
|
|
|
|
}
|
|
|
|
});
|
|
|
|
// cursorAt option
|
|
$.widget( "ui.draggable", $.ui.draggable, {
|
|
options: {
|
|
cursorAt: false
|
|
},
|
|
|
|
_create: function() {
|
|
|
|
var self = this;
|
|
|
|
this._super();
|
|
|
|
this.element.on( "dragbeforestart", function( event, ui ) {
|
|
|
|
var elem = self.dragEl,
|
|
cursorAt = self.options.cursorAt;
|
|
|
|
// No need to continue
|
|
if ( !cursorAt ) {
|
|
return;
|
|
}
|
|
|
|
if ( "top" in cursorAt ) {
|
|
ui.position.top += ui.pointer.y - ui.offset.top - cursorAt.top;
|
|
}
|
|
if ( "left" in cursorAt ) {
|
|
ui.position.left += ui.pointer.x - ui.offset.left - cursorAt.left;
|
|
}
|
|
if ( "bottom" in cursorAt ) {
|
|
ui.position.top += ui.pointer.y - ui.offset.top - elem.outerHeight() + cursorAt.bottom;
|
|
}
|
|
if ( "right" in cursorAt ) {
|
|
ui.position.left += ui.pointer.x - ui.offset.left - elem.outerWidth() + cursorAt.right;
|
|
}
|
|
});
|
|
|
|
}
|
|
|
|
});
|
|
|
|
// grid option
|
|
$.widget( "ui.draggable", $.ui.draggable, {
|
|
options: {
|
|
grid: false
|
|
},
|
|
|
|
_create: function() {
|
|
|
|
var self = this,
|
|
currentX, currentY;
|
|
|
|
this._super();
|
|
|
|
this.element.on( "dragbeforestart", function( event, ui ) {
|
|
|
|
if ( !self.options.grid ) {
|
|
return;
|
|
}
|
|
|
|
// Save off the start position, which may be overwritten during drag
|
|
currentX = ui.position.left;
|
|
currentY = ui.position.top;
|
|
|
|
});
|
|
|
|
this.element.on( "drag", function( event, ui ) {
|
|
|
|
if ( !self.options.grid ) {
|
|
return;
|
|
}
|
|
|
|
// Save off the intended intervals
|
|
var x = self.options.grid[0],
|
|
y = self.options.grid[1];
|
|
|
|
// If x is actually something, check that user is at least half way to next point
|
|
if ( x ) {
|
|
if ( ui.position.left - currentX > x/2 ) {
|
|
currentX = currentX + x;
|
|
} else if ( currentX - ui.position.left > x/2 ) {
|
|
currentX = currentX - x;
|
|
}
|
|
}
|
|
|
|
// If y is actually something, check that user is at least half way to next point
|
|
if ( y ) {
|
|
if ( ui.position.top - currentY > y/2 ) {
|
|
currentY = currentY + y;
|
|
} else if ( currentY - ui.position.top > y/2 ) {
|
|
currentY = currentY - y;
|
|
}
|
|
}
|
|
|
|
// If there threshold wasn't crossed these variables wouldn't be changed
|
|
// Otherwise this will now bump the draggable to the next spot on grid
|
|
ui.position.left = currentX;
|
|
ui.position.top = currentY;
|
|
|
|
});
|
|
|
|
}
|
|
|
|
});
|
|
|
|
// opacity option
|
|
$.widget( "ui.draggable", $.ui.draggable, {
|
|
options: {
|
|
opacity: false
|
|
},
|
|
|
|
_create: function() {
|
|
|
|
var self = this,
|
|
originalOpacity;
|
|
|
|
this._super();
|
|
|
|
this.element.on( "dragstart", function() {
|
|
|
|
// No need to continue
|
|
if ( !self.options.opacity ) {
|
|
return;
|
|
}
|
|
|
|
// Cache the original opacity of draggable element to reset later
|
|
originalOpacity = self.dragEl.css( 'opacity' );
|
|
|
|
// Set draggable element to new opacity
|
|
self.dragEl.css( 'opacity', self.options.opacity );
|
|
|
|
});
|
|
|
|
this.element.on( "dragstop", function() {
|
|
|
|
// No need to continue
|
|
if ( !self.options.opacity ) {
|
|
return;
|
|
}
|
|
|
|
// Reset opacity
|
|
self.dragEl.css( 'opacity', originalOpacity );
|
|
|
|
});
|
|
|
|
}
|
|
|
|
});
|
|
|
|
// TODO: handle droppables
|
|
// revert + revertDuration options
|
|
$.widget( "ui.draggable", $.ui.draggable, {
|
|
options: {
|
|
revert: false,
|
|
revertDuration: 500
|
|
},
|
|
|
|
_create: function() {
|
|
|
|
var self = this,
|
|
originalLeft, originalTop, originalPosition;
|
|
|
|
this._super();
|
|
|
|
this.element.on( "dragbeforestart", function() {
|
|
|
|
// No need to continue
|
|
if ( !self.options.revert ) {
|
|
return;
|
|
}
|
|
|
|
// Cache the original css of draggable element to reset later
|
|
originalLeft = self.dragEl.css( 'left' );
|
|
originalTop = self.dragEl.css( 'top' );
|
|
originalPosition = self.dragEl.css( 'position' );
|
|
|
|
});
|
|
|
|
this.element.on( "dragstop", function() {
|
|
|
|
// No need to continue
|
|
if ( !self.options.revert ) {
|
|
return;
|
|
}
|
|
|
|
// Reset to before drag
|
|
self.dragEl.animate({
|
|
left: originalLeft,
|
|
top: originalTop,
|
|
position: originalPosition
|
|
}, self.options.revertDuration );
|
|
|
|
});
|
|
|
|
}
|
|
|
|
});
|
|
|
|
// zIndex option
|
|
$.widget( "ui.draggable", $.ui.draggable, {
|
|
options: {
|
|
zIndex: false
|
|
},
|
|
|
|
_create: function() {
|
|
|
|
var self = this,
|
|
originalZIndex;
|
|
|
|
this._super();
|
|
|
|
this.element.on( "dragstart", function() {
|
|
|
|
// No need to continue
|
|
if ( !self.options.zIndex ) {
|
|
return;
|
|
}
|
|
|
|
// Cache the original zIndex of draggable element to reset later
|
|
originalZIndex = self.dragEl.css( 'z-index' );
|
|
|
|
// Set draggable element to new zIndex
|
|
self.dragEl.css( 'z-index', self.options.zIndex );
|
|
|
|
});
|
|
|
|
this.element.on( "dragstop", function() {
|
|
|
|
// No need to continue
|
|
if ( !self.options.zIndex ) {
|
|
return;
|
|
}
|
|
|
|
// Reset zIndex
|
|
self.dragEl.css( 'z-index', originalZIndex );
|
|
|
|
});
|
|
|
|
}
|
|
|
|
});
|
|
|
|
// TODO: need droppable working
|
|
// scope option
|
|
$.widget( "ui.draggable", $.ui.draggable, {
|
|
options: {
|
|
scope: "default"
|
|
}
|
|
});
|
|
|
|
// scroll + scrollSensitivity + scrollSpeedType option
|
|
$.widget( "ui.draggable", $.ui.draggable, {
|
|
options: {
|
|
scroll: true,
|
|
scrollSpeed: null,
|
|
scrollSensitivity: null
|
|
},
|
|
_create : function() {
|
|
|
|
var self = this,
|
|
handleScroll = this._handleScrolling,
|
|
speed = this._speed;
|
|
|
|
this._super();
|
|
|
|
this._speed = function( distance ) {
|
|
|
|
if ( self.options.scrollSpeed !== null ) {
|
|
|
|
self.scrollSpeed = self.options.scrollSpeed;
|
|
|
|
// Undo calculation that makes things go faster as distance increases
|
|
distance = 0;
|
|
}
|
|
|
|
return speed.call( self, distance );
|
|
|
|
};
|
|
|
|
// Wrap member function to check for ability to scroll
|
|
this._handleScrolling = function( pointerPosition ) {
|
|
|
|
if ( !self.options.scroll ) {
|
|
return;
|
|
}
|
|
|
|
if ( self.options.scrollSensitivity !== null ) {
|
|
self.scrollSensitivity = self.options.scrollSensitivity;
|
|
}
|
|
|
|
handleScroll.call( self, pointerPosition );
|
|
|
|
};
|
|
|
|
}
|
|
|
|
});
|
|
|
|
// stack option
|
|
$.widget( "ui.draggable", $.ui.draggable, {
|
|
options: {
|
|
stack: false
|
|
},
|
|
|
|
_create: function() {
|
|
|
|
var self = this;
|
|
|
|
this._super();
|
|
|
|
this.element.on( "dragbeforestart", function() {
|
|
|
|
var stack = self.options.stack,
|
|
group, min;
|
|
|
|
if ( !self.options.stack ) {
|
|
return;
|
|
}
|
|
|
|
group = $.makeArray( $(stack) ).sort(function(a,b) {
|
|
|
|
var aZIndex = parseInt( $(a).css("zIndex"), 10 ),
|
|
bZIndex = parseInt( $(b).css("zIndex"), 10 );
|
|
|
|
return ( aZIndex || 0) - ( bZIndex|| 0);
|
|
});
|
|
|
|
if (!group.length) {
|
|
return;
|
|
}
|
|
|
|
min = parseInt(group[0].style.zIndex, 10) || 0;
|
|
|
|
$(group).each(function(i) {
|
|
this.style.zIndex = min + i;
|
|
});
|
|
|
|
self.element[0].style.zIndex = min + group.length;
|
|
|
|
});
|
|
|
|
}
|
|
|
|
});
|
|
|
|
} |