mirror of
https://github.com/jquery/jquery-ui.git
synced 2024-11-21 11:04:24 +00:00
1227 lines
32 KiB
JavaScript
1227 lines
32 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 2013 jQuery Foundation and other contributors
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* Released under the MIT license.
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* http://jquery.org/license
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*
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* http://api.jqueryui.com/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",
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handle: null,
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helper: false,
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// callbacks
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beforeStart: null,
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drag: null,
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start: null,
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stop: null
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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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// dragDimensions: saved off width and height used for various options
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scrollSensitivity: 20,
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scrollSpeed: 5,
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_create: function() {
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this._super();
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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 ?
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element.is( this.element.find( this.options.handle ) ) :
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true,
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exclude = this.options.exclude ?
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element.is( this.element.find( this.options.exclude ) ) :
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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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// Reset
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this.dragDimensions = null;
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// The actual dragging element, should always be a jQuery object
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this.dragEl = ( this.options.helper === true || $.isFunction( this.options.helper ) ) ?
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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._appendTo() )
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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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// If not already cached within _createHelper()
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if ( !this.dragDimensions ) {
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this._cacheDragDimensions( this.dragEl );
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}
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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 ] &&
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this.scrollParent[ 0 ].tagName.toUpperCase() !== "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 `appendTo` element
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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
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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 `appendTo` element
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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,
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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,
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this._fullHash( pointerPosition ) ) !== false ) {
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if ( this.options.helper ) {
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delete this.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 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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this.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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this.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 || !this.helper.closest( "body" ).length ) {
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this.helper.appendTo( this._appendTo() || this.document[ 0 ].body );
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}
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this._cacheDragDimensions( this.helper );
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return this.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 - this.dragDimensions.width * xPos,
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top: pointerPosition.y - this.dragDimensions.height * yPos
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});
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},
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_cacheDragDimensions: function( element ) {
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this.dragDimensions = {
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width: element.outerWidth(),
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height: element.outerHeight()
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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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_appendTo: 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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// TODO: add proper support comment
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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 newScrollTop, newScrollLeft, change,
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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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change = this._speed( scrollSensitivity - yBottom );
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this.scrollParent.scrollTop( scrollTop + change );
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this.originalPointer.y = this.originalPointer.y + change;
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} else if ( yTop < scrollSensitivity ) {
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change = this._speed( scrollSensitivity - yTop );
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newScrollTop = scrollTop - change;
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// Don't do anything unless new value is "real"
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if ( newScrollTop >= 0 ) {
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this.scrollParent.scrollTop( newScrollTop );
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this._speed( scrollSensitivity - yTop );
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this.originalPointer.y = this.originalPointer.y - change;
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}
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}
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// Handle horizontal scrolling
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if ( xRight < scrollSensitivity ) {
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change = this._speed( scrollSensitivity - xRight );
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this.scrollParent.scrollLeft( scrollLeft + change);
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this.originalPointer.x = this.originalPointer.x + change;
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} else if ( xLeft < scrollSensitivity ) {
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change = this._speed( scrollSensitivity - xLeft );
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newScrollLeft = scrollLeft - change;
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// Don't do anything unless new value is "real"
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if ( newScrollLeft >= 0 ) {
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this.scrollParent.scrollLeft( newScrollLeft );
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this.originalPointer.x = this.originalPointer.x - change;
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}
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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
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// 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 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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return $( "<div>" )
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.css( "position", "absolute" )
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.appendTo( iframe.parent() )
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.outerWidth( iframe.outerWidth() )
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.outerHeight( iframe.outerHeight() )
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.offset( iframe.offset() )[ 0 ];
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});
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},
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_unblockFrames: function() {
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if ( this.iframeBlocks ) {
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this.iframeBlocks.remove();
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delete this.iframeBlocks;
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}
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},
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_destroy: function() {
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this.element.removeClass( "ui-draggable" );
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this._super();
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}
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});
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// Add containment option via extension
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$.widget( "ui.draggable", $.ui.draggable, {
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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, bottom, right,
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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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if ( $.isArray( container ) ) {
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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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right = left + container.width();
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bottom = top + container.height();
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} else {
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left = container[ 0 ];
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top = container[ 1 ];
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right = container[ 2 ];
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bottom = container[ 3 ];
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}
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this.containment = {
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left: left,
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top: top,
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right: right,
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bottom: bottom,
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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.dragDimensions.width,
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height: this.dragDimensions.height
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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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// DEPRECATED
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if ( $.uiBackCompat !== false ) {
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|
|
// appendTo "parent" value
|
|
$.widget( "ui.draggable", $.ui.draggable, {
|
|
_appendTo: function() {
|
|
var element = this.options.appendTo;
|
|
|
|
// This should only happen via _createHelper()
|
|
if ( element === null ) {
|
|
return this.element.parent();
|
|
}
|
|
|
|
if ( element === "parent" ) {
|
|
element = this.dragEl.parent();
|
|
}
|
|
|
|
return element;
|
|
}
|
|
});
|
|
|
|
// helper "original" or "clone" value + helper return value
|
|
$.widget( "ui.draggable", $.ui.draggable, {
|
|
_create: function() {
|
|
if ( this.options.helper === "original" ) {
|
|
this.options.helper = false;
|
|
}
|
|
|
|
if ( this.options.helper === "clone" ) {
|
|
this.options.helper = true;
|
|
}
|
|
|
|
this._super();
|
|
},
|
|
|
|
_originalHash: function() {
|
|
var ret = this._superApply( arguments );
|
|
|
|
if ( !ret.helper ) {
|
|
ret.helper = this.element;
|
|
}
|
|
|
|
return ret;
|
|
},
|
|
|
|
_setOption: function( key, value ) {
|
|
if ( key === "helper" && value === "clone" ) {
|
|
value = true;
|
|
} else if ( key === "helper" && value === "original" ) {
|
|
value = false;
|
|
}
|
|
|
|
this._super( key, value );
|
|
}
|
|
});
|
|
|
|
// axis option
|
|
$.widget( "ui.draggable", $.ui.draggable, {
|
|
options: {
|
|
axis: false
|
|
},
|
|
|
|
_create: function() {
|
|
this._super();
|
|
|
|
this._on({
|
|
drag: function( event, ui ) {
|
|
if ( this.options.axis === "x" ) {
|
|
ui.position.top = ui.originalPosition.top;
|
|
}
|
|
|
|
if ( this.options.axis === "y" ) {
|
|
ui.position.left = ui.originalPosition.left;
|
|
}
|
|
}
|
|
});
|
|
}
|
|
});
|
|
|
|
// cancel option
|
|
$.widget( "ui.draggable", $.ui.draggable, {
|
|
options: {
|
|
cancel: null
|
|
},
|
|
|
|
_create: function() {
|
|
if ( this.options.cancel !== null ) {
|
|
this.options.exclude = this.options.cancel;
|
|
}
|
|
|
|
this._super();
|
|
},
|
|
|
|
_setOption: function( key, value ) {
|
|
if ( key === "cancel" ) {
|
|
key = "exclude";
|
|
}
|
|
|
|
this._super( key, value );
|
|
this.options.cancel = this.options.exclude;
|
|
}
|
|
});
|
|
|
|
// cursor option
|
|
$.widget( "ui.draggable", $.ui.draggable, {
|
|
options: {
|
|
cursor: "auto"
|
|
},
|
|
|
|
_create: function() {
|
|
var startCursor, body;
|
|
|
|
this._super();
|
|
|
|
body = $( this.document[ 0 ].body );
|
|
|
|
this._on({
|
|
// Cache original cursor to set back
|
|
dragbeforestart: function() {
|
|
if ( this.options.cursor ) {
|
|
startCursor = body[ 0 ].style.cursor;
|
|
body.css( "cursor", this.options.cursor );
|
|
}
|
|
},
|
|
|
|
// Set back cursor to whatever default was
|
|
dragstop: function() {
|
|
if ( this.options.cursor ) {
|
|
body.css( "cursor", startCursor );
|
|
}
|
|
}
|
|
});
|
|
}
|
|
});
|
|
|
|
// cursorAt option
|
|
$.widget( "ui.draggable", $.ui.draggable, {
|
|
options: {
|
|
cursorAt: false
|
|
},
|
|
|
|
_create: function() {
|
|
this._super();
|
|
|
|
this._on({
|
|
dragbeforestart: function( event, ui ) {
|
|
var cursorAt = this.options.cursorAt;
|
|
|
|
if ( !cursorAt ) {
|
|
return;
|
|
}
|
|
|
|
if ( typeof cursorAt === "string" ) {
|
|
cursorAt = cursorAt.split(" ");
|
|
}
|
|
if ( $.isArray( cursorAt ) ) {
|
|
cursorAt = {
|
|
left: +cursorAt[ 0 ],
|
|
top: +cursorAt[ 1 ] || 0
|
|
};
|
|
}
|
|
|
|
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 - this.dragDimensions.height +
|
|
cursorAt.bottom;
|
|
}
|
|
if ( "right" in cursorAt ) {
|
|
ui.position.left += ui.pointer.x -
|
|
ui.offset.left - this.dragDimensions.width +
|
|
cursorAt.right;
|
|
}
|
|
}
|
|
});
|
|
}
|
|
});
|
|
|
|
// grid option
|
|
$.widget( "ui.draggable", $.ui.draggable, {
|
|
options: {
|
|
grid: false
|
|
},
|
|
|
|
_create: function() {
|
|
var currentX, currentY;
|
|
|
|
this._super();
|
|
|
|
this._on({
|
|
dragbeforestart: function( event, ui ) {
|
|
if ( !this.options.grid ) {
|
|
return;
|
|
}
|
|
|
|
// Save off the start position,
|
|
// which may be overwritten during drag
|
|
currentX = ui.position.left;
|
|
currentY = ui.position.top;
|
|
},
|
|
|
|
drag: function( event, ui ) {
|
|
if ( !this.options.grid ) {
|
|
return;
|
|
}
|
|
|
|
// Save off the intended intervals
|
|
var x = this.options.grid[ 0 ],
|
|
y = this.options.grid[ 1 ];
|
|
|
|
// Check that user is at least half way to next point on x axis
|
|
if ( x ) {
|
|
if ( ui.position.left - currentX >= x / 2 ) {
|
|
currentX = currentX + x;
|
|
} else if ( currentX - ui.position.left >= x / 2 ) {
|
|
currentX = currentX - x;
|
|
}
|
|
}
|
|
|
|
// Check that user is at least half way to next point on y axis
|
|
if ( y ) {
|
|
if ( ui.position.top - currentY >= y / 2 ) {
|
|
currentY = currentY + y;
|
|
} else if ( currentY - ui.position.top >= y / 2 ) {
|
|
currentY = currentY - y;
|
|
}
|
|
}
|
|
|
|
// Force the draggable to the appropriate spot on the grid
|
|
ui.position.left = currentX;
|
|
ui.position.top = currentY;
|
|
}
|
|
});
|
|
}
|
|
});
|
|
|
|
// opacity option
|
|
$.widget( "ui.draggable", $.ui.draggable, {
|
|
options: {
|
|
opacity: false
|
|
},
|
|
|
|
_create: function() {
|
|
var originalOpacity;
|
|
|
|
this._super();
|
|
|
|
this._on({
|
|
dragstart: function() {
|
|
if ( !this.options.opacity ) {
|
|
return;
|
|
}
|
|
|
|
// Cache the original opacity of draggable element to reset later
|
|
originalOpacity = this.dragEl.css( "opacity" );
|
|
|
|
// Set draggable element to new opacity
|
|
this.dragEl.css( "opacity", this.options.opacity );
|
|
},
|
|
|
|
dragstop: function() {
|
|
if ( !this.options.opacity ) {
|
|
return;
|
|
}
|
|
|
|
// Reset opacity
|
|
this.dragEl.css( "opacity", originalOpacity );
|
|
}
|
|
});
|
|
}
|
|
});
|
|
|
|
// TODO: handle droppables
|
|
// revert + revertDuration options
|
|
$.widget( "ui.draggable", $.ui.draggable, {
|
|
options: {
|
|
revert: false,
|
|
revertDuration: 500
|
|
},
|
|
|
|
_create: function() {
|
|
var originalLeft, originalTop, originalPosition;
|
|
|
|
this._super();
|
|
|
|
this._on({
|
|
dragbeforestart: function() {
|
|
if ( !this.options.revert ) {
|
|
return;
|
|
}
|
|
|
|
// Cache the original css of draggable element to reset later
|
|
originalLeft = this.dragEl.css( "left" );
|
|
originalTop = this.dragEl.css( "top" );
|
|
originalPosition = this.dragEl.css( "position" );
|
|
},
|
|
|
|
dragstop: function() {
|
|
if ( !this.options.revert ) {
|
|
return;
|
|
}
|
|
|
|
// Reset to before drag
|
|
this.dragEl.animate({
|
|
left: originalLeft,
|
|
top: originalTop,
|
|
position: originalPosition
|
|
}, this.options.revertDuration );
|
|
}
|
|
});
|
|
}
|
|
});
|
|
|
|
// zIndex option
|
|
$.widget( "ui.draggable", $.ui.draggable, {
|
|
options: {
|
|
zIndex: false
|
|
},
|
|
|
|
_create: function() {
|
|
var originalZindex;
|
|
|
|
this._super();
|
|
|
|
this._on({
|
|
dragstart: function() {
|
|
if ( !this.options.zIndex ) {
|
|
return;
|
|
}
|
|
|
|
// Cache the original zIndex of draggable element to reset later
|
|
originalZindex = this.dragEl.css( "z-index" );
|
|
|
|
// Set draggable element to new zIndex
|
|
this.dragEl.css( "z-index", this.options.zIndex );
|
|
},
|
|
|
|
dragstop: function() {
|
|
if ( !this.options.zIndex ) {
|
|
return;
|
|
}
|
|
|
|
// Reset zIndex
|
|
this.dragEl.css( "z-index", originalZindex );
|
|
}
|
|
});
|
|
}
|
|
});
|
|
|
|
// scope option
|
|
$.widget( "ui.draggable", $.ui.draggable, {
|
|
options: {
|
|
scope: "default"
|
|
}
|
|
});
|
|
|
|
// scroll + scrollSensitivity + scrollSpeedType option
|
|
$.widget( "ui.draggable", $.ui.draggable, {
|
|
options: {
|
|
scroll: true,
|
|
scrollSpeed: 20,
|
|
scrollSensitivity: 20
|
|
},
|
|
|
|
_speed: function( distance ) {
|
|
if ( this.options.scrollSpeed !== null ) {
|
|
this.scrollSpeed = this.options.scrollSpeed;
|
|
|
|
// Undo calculation that makes things go faster as distance increases
|
|
distance = 0;
|
|
}
|
|
|
|
return this._super( distance );
|
|
},
|
|
|
|
_handleScrolling: function( pointerPosition ) {
|
|
if ( !this.options.scroll ) {
|
|
return;
|
|
}
|
|
|
|
if ( this.options.scrollSensitivity !== null ) {
|
|
this.scrollSensitivity = this.options.scrollSensitivity;
|
|
}
|
|
|
|
this._super( pointerPosition );
|
|
}
|
|
});
|
|
|
|
// stack option
|
|
$.widget( "ui.draggable", $.ui.draggable, {
|
|
options: {
|
|
stack: false
|
|
},
|
|
|
|
_create: function() {
|
|
this._super();
|
|
|
|
this._on({
|
|
dragbeforestart: function() {
|
|
var group, min,
|
|
stack = this.options.stack;
|
|
|
|
if ( !stack ) {
|
|
return;
|
|
}
|
|
|
|
group = $.makeArray( $( stack ) ).sort(function( a, b ) {
|
|
var aZIndex = parseInt( $( a ).css( "zIndex" ), 10 ) || 0,
|
|
bZIndex = parseInt( $( b ).css( "zIndex" ), 10 ) || 0;
|
|
return aZIndex - bZIndex;
|
|
});
|
|
|
|
if ( !group.length ) {
|
|
return;
|
|
}
|
|
|
|
min = parseInt( group[ 0 ].style.zIndex, 10 ) || 0;
|
|
|
|
$( group ).each(function( i ) {
|
|
this.style.zIndex = min + i;
|
|
});
|
|
|
|
this.element.css( "zIndex", min + group.length );
|
|
}
|
|
});
|
|
}
|
|
});
|
|
|
|
// TODO: cleanup
|
|
// snap, snapMode, and snapTolerance options
|
|
$.widget( "ui.draggable", $.ui.draggable, {
|
|
options: {
|
|
snap: false,
|
|
snapMode: "both",
|
|
snapTolerance: 20
|
|
},
|
|
|
|
_create: function() {
|
|
var inst = this,
|
|
snapElements;
|
|
|
|
this._super();
|
|
|
|
this.element.on( "dragstart", function() {
|
|
|
|
// Nothing to do
|
|
if ( !inst.options.snap ) {
|
|
return;
|
|
}
|
|
|
|
// Reset snapElements on every start in case there have been changes
|
|
snapElements = [];
|
|
|
|
// Select either all draggable elements, or the selector that was passed in
|
|
$( inst.options.snap === true ? ":data(ui-draggable)" : inst.options.snap ).each(function() {
|
|
|
|
var el = $(this),
|
|
offset = el.offset();
|
|
|
|
// Don't add this draggable to list of elements for snapping
|
|
if( this === inst.element[0] ) {
|
|
return;
|
|
}
|
|
|
|
// Save off elements dimensions for later
|
|
snapElements.push({
|
|
item: this,
|
|
width: el.outerWidth(),
|
|
height: el.outerHeight(),
|
|
top: offset.top,
|
|
left: offset.left
|
|
});
|
|
|
|
});
|
|
|
|
inst.margins = {
|
|
left: (parseInt(inst.element.css("marginLeft"),10) || 0),
|
|
top: (parseInt(inst.element.css("marginTop"),10) || 0),
|
|
right: (parseInt(inst.element.css("marginRight"),10) || 0),
|
|
bottom: (parseInt(inst.element.css("marginBottom"),10) || 0)
|
|
};
|
|
|
|
});
|
|
|
|
this.element.on( "drag", function( event, ui ) {
|
|
|
|
// Nothing to do
|
|
if ( !inst.options.snap ) {
|
|
return;
|
|
}
|
|
|
|
var ts, bs, ls, rs, l, r, t, b, i, first,
|
|
o = inst.options,
|
|
d = o.snapTolerance,
|
|
x1 = ui.offset.left, x2 = x1 + inst.dragDimensions.width,
|
|
y1 = ui.offset.top, y2 = y1 + inst.dragDimensions.height;
|
|
|
|
for (i = snapElements.length - 1; i >= 0; i--){
|
|
l = snapElements[i].left;
|
|
r = l + snapElements[i].width;
|
|
t = snapElements[i].top;
|
|
b = t + snapElements[i].height;
|
|
|
|
//Yes, I know, this is insane ;)
|
|
if(!((l-d < x1 && x1 < r+d && t-d < y1 && y1 < b+d) || (l-d < x1 && x1 < r+d && t-d < y2 && y2 < b+d) || (l-d < x2 && x2 < r+d && t-d < y1 && y1 < b+d) || (l-d < x2 && x2 < r+d && t-d < y2 && y2 < b+d))) {
|
|
if(snapElements[i].snapping) {
|
|
(inst.options.snap.release && inst.options.snap.release.call(inst.element, event, $.extend(inst._uiHash(), { snapItem: snapElements[i].item })));
|
|
}
|
|
snapElements[i].snapping = false;
|
|
continue;
|
|
}
|
|
|
|
if(o.snapMode !== "inner") {
|
|
ts = Math.abs(t - y2) <= d;
|
|
bs = Math.abs(b - y1) <= d;
|
|
ls = Math.abs(l - x2) <= d;
|
|
rs = Math.abs(r - x1) <= d;
|
|
if(ts) {
|
|
ui.position.top = inst._convertPositionTo("relative", { top: t - inst.dragDimensions.height, left: 0 }).top - inst.margins.top;
|
|
}
|
|
if(bs) {
|
|
ui.position.top = inst._convertPositionTo("relative", { top: b, left: 0 }).top - inst.margins.top;
|
|
}
|
|
if(ls) {
|
|
ui.position.left = inst._convertPositionTo("relative", { top: 0, left: l - inst.dragDimensions.width }).left - inst.margins.left;
|
|
}
|
|
if(rs) {
|
|
ui.position.left = inst._convertPositionTo("relative", { top: 0, left: r }).left - inst.margins.left;
|
|
}
|
|
}
|
|
|
|
first = (ts || bs || ls || rs);
|
|
|
|
if(o.snapMode !== "outer") {
|
|
ts = Math.abs(t - y1) <= d;
|
|
bs = Math.abs(b - y2) <= d;
|
|
ls = Math.abs(l - x1) <= d;
|
|
rs = Math.abs(r - x2) <= d;
|
|
if(ts) {
|
|
ui.position.top = inst._convertPositionTo("relative", { top: t, left: 0 }).top - inst.margins.top;
|
|
}
|
|
if(bs) {
|
|
ui.position.top = inst._convertPositionTo("relative", { top: b - inst.dragDimensions.height, left: 0 }).top - inst.margins.top;
|
|
}
|
|
if(ls) {
|
|
ui.position.left = inst._convertPositionTo("relative", { top: 0, left: l }).left - inst.margins.left;
|
|
}
|
|
if(rs) {
|
|
ui.position.left = inst._convertPositionTo("relative", { top: 0, left: r - inst.dragDimensions.width }).left - inst.margins.left;
|
|
}
|
|
}
|
|
|
|
if(!snapElements[i].snapping && (ts || bs || ls || rs || first)) {
|
|
(inst.options.snap.snap && inst.options.snap.snap.call(inst.element, event, $.extend(inst._uiHash(), { snapItem: snapElements[i].item })));
|
|
}
|
|
snapElements[i].snapping = (ts || bs || ls || rs || first);
|
|
}
|
|
});
|
|
},
|
|
|
|
_convertPositionTo: function(d, pos) {
|
|
if(!pos) {
|
|
pos = this.position;
|
|
}
|
|
|
|
var mod = d === "absolute" ? 1 : -1,
|
|
offset = {},
|
|
scroll = this.cssPosition === "absolute" && !(this.scrollParent[0] !== document && $.contains(this.scrollParent[0], this.offsetParent[0])) ? this.offsetParent : this.scrollParent, scrollIsRootNode = (/(html|body)/i).test(scroll[0].tagName);
|
|
|
|
$.extend(offset, {
|
|
parent: this._getParentOffset(),
|
|
relative: this._getRelativeOffset() //This is a relative to absolute position minus the actual position calculation - only used for relative positioned helper
|
|
});
|
|
|
|
return {
|
|
top: (
|
|
pos.top + // The absolute mouse position
|
|
offset.relative.top * mod + // Only for relative positioned nodes: Relative offset from element to offset parent
|
|
offset.parent.top * mod - // The offsetParent's offset without borders (offset + border)
|
|
( ( this.cssPosition === "fixed" ? -this.scrollParent.scrollTop() : ( scrollIsRootNode ? 0 : scroll.scrollTop() ) ) * mod)
|
|
),
|
|
left: (
|
|
pos.left + // The absolute mouse position
|
|
offset.relative.left * mod + // Only for relative positioned nodes: Relative offset from element to offset parent
|
|
offset.parent.left * mod - // The offsetParent's offset without borders (offset + border)
|
|
( ( this.cssPosition === "fixed" ? -this.scrollParent.scrollLeft() : scrollIsRootNode ? 0 : scroll.scrollLeft() ) * mod)
|
|
)
|
|
};
|
|
},
|
|
|
|
_getParentOffset: function() {
|
|
|
|
//Get the offsetParent and cache its position
|
|
this.offsetParent = this.dragEl.offsetParent();
|
|
var po = this.offsetParent.offset();
|
|
|
|
// This is a special case where we need to modify a offset calculated on start, since the following happened:
|
|
// 1. The position of the helper is absolute, so it's position is calculated based on the next positioned parent
|
|
// 2. The actual offset parent is a child of the scroll parent, and the scroll parent isn't the document, which means that
|
|
// the scroll is included in the initial calculation of the offset of the parent, and never recalculated upon drag
|
|
if(this.cssPosition === "absolute" && this.scrollParent[0] !== document && $.contains(this.scrollParent[0], this.offsetParent[0])) {
|
|
po.left += this.scrollParent.scrollLeft();
|
|
po.top += this.scrollParent.scrollTop();
|
|
}
|
|
|
|
//This needs to be actually done for all browsers, since pageX/pageY includes this information
|
|
//Ugly IE fix
|
|
if((this.offsetParent[0] === document.body) ||
|
|
(this.offsetParent[0].tagName && this.offsetParent[0].tagName.toLowerCase() === "html" && $.ui.ie)) {
|
|
po = { top: 0, left: 0 };
|
|
}
|
|
|
|
return {
|
|
top: po.top + (parseInt(this.offsetParent.css("borderTopWidth"),10) || 0),
|
|
left: po.left + (parseInt(this.offsetParent.css("borderLeftWidth"),10) || 0)
|
|
};
|
|
},
|
|
|
|
_getRelativeOffset: function() {
|
|
if(this.cssPosition === "relative") {
|
|
var p = this.element.position();
|
|
return {
|
|
top: p.top - (parseInt(this.dragEl.css("top"),10) || 0) + this.scrollParent.scrollTop(),
|
|
left: p.left - (parseInt(this.dragEl.css("left"),10) || 0) + this.scrollParent.scrollLeft()
|
|
};
|
|
}
|
|
|
|
return { top: 0, left: 0 };
|
|
}
|
|
});
|
|
|
|
// refreshPositions option
|
|
$.widget( "ui.draggable", $.ui.draggable, {
|
|
options: {
|
|
refreshPositions: false
|
|
},
|
|
|
|
_create: function() {
|
|
var drops;
|
|
|
|
this._super();
|
|
|
|
this._on({
|
|
dragstart: function() {
|
|
drops = $( ":data(ui-sortable)" );
|
|
},
|
|
|
|
drag: function() {
|
|
if ( this.options.refreshPositions !== true ) {
|
|
return;
|
|
}
|
|
|
|
drops.each(function() {
|
|
$( this ).sortable( "refreshPositions" );
|
|
});
|
|
}
|
|
});
|
|
}
|
|
});
|
|
}
|
|
|
|
})( jQuery );
|