resources/jquery.ui/jquery.ui.mouse.js

   1 /*!
   2  * jQuery UI Mouse 1.8.24
   3  *
   4  * Copyright 2012, AUTHORS.txt (http://jqueryui.com/about)
   5  * Dual licensed under the MIT or GPL Version 2 licenses.
   6  * http://jquery.org/license
   7  *
   8  * http://docs.jquery.com/UI/Mouse
   9  *
  10  * Depends:
  11  *      jquery.ui.widget.js
  12  */
  13 (function( $, undefined ) {
  14
  15 var mouseHandled = false;
  16 $( document ).mouseup( function( e ) {
  17         mouseHandled = false;
  18 });
  19
  20 $.widget("ui.mouse", {
  21         options: {
  22                 cancel: ':input,option',
  23                 distance: 1,
  24                 delay: 0
  25         },
  26         _mouseInit: function() {
  27                 var self = this;
  28
  29                 this.element
  30                         .bind('mousedown.'+this.widgetName, function(event) {
  31                                 return self._mouseDown(event);
  32                         })
  33                         .bind('click.'+this.widgetName, function(event) {
  34                                 if (true === $.data(event.target, self.widgetName + '.preventClickEvent')) {
  35                                     $.removeData(event.target, self.widgetName + '.preventClickEvent');
  36                                         event.stopImmediatePropagation();
  37                                         return false;
  38                                 }
  39                         });
  40
  41                 this.started = false;
  42         },
  43
  44         // TODO: make sure destroying one instance of mouse doesn't mess with
  45         // other instances of mouse
  46         _mouseDestroy: function() {
  47                 this.element.unbind('.'+this.widgetName);
  48                 if ( this._mouseMoveDelegate ) {
  49                         $(document)
  50                                 .unbind('mousemove.'+this.widgetName, this._mouseMoveDelegate)
  51                                 .unbind('mouseup.'+this.widgetName, this._mouseUpDelegate);
  52                 }
  53         },
  54
  55         _mouseDown: function(event) {
  56                 // don't let more than one widget handle mouseStart
  57                 if( mouseHandled ) { return };
  58
  59                 // we may have missed mouseup (out of window)
  60                 (this._mouseStarted && this._mouseUp(event));
  61
  62                 this._mouseDownEvent = event;
  63
  64                 var self = this,
  65                         btnIsLeft = (event.which == 1),
  66                         // event.target.nodeName works around a bug in IE 8 with
  67                         // disabled inputs (#7620)
  68                         elIsCancel = (typeof this.options.cancel == "string" && event.target.nodeName ? $(event.target).closest(this.options.cancel).length : false);
  69                 if (!btnIsLeft || elIsCancel || !this._mouseCapture(event)) {
  70                         return true;
  71                 }
  72
  73                 this.mouseDelayMet = !this.options.delay;
  74                 if (!this.mouseDelayMet) {
  75                         this._mouseDelayTimer = setTimeout(function() {
  76                                 self.mouseDelayMet = true;
  77                         }, this.options.delay);
  78                 }
  79
  80                 if (this._mouseDistanceMet(event) && this._mouseDelayMet(event)) {
  81                         this._mouseStarted = (this._mouseStart(event) !== false);
  82                         if (!this._mouseStarted) {
  83                                 event.preventDefault();
  84                                 return true;
  85                         }
  86                 }
  87
  88                 // Click event may never have fired (Gecko & Opera)
  89                 if (true === $.data(event.target, this.widgetName + '.preventClickEvent')) {
  90                         $.removeData(event.target, this.widgetName + '.preventClickEvent');
  91                 }
  92
  93                 // these delegates are required to keep context
  94                 this._mouseMoveDelegate = function(event) {
  95                         return self._mouseMove(event);
  96                 };
  97                 this._mouseUpDelegate = function(event) {
  98                         return self._mouseUp(event);
  99                 };
 100                 $(document)
 101                         .bind('mousemove.'+this.widgetName, this._mouseMoveDelegate)
 102                         .bind('mouseup.'+this.widgetName, this._mouseUpDelegate);
 103
 104                 event.preventDefault();
 105
 106                 mouseHandled = true;
 107                 return true;
 108         },
 109
 110         _mouseMove: function(event) {
 111                 // IE mouseup check - mouseup happened when mouse was out of window
 112                 if ($.browser.msie && !(document.documentMode >= 9) && !event.button) {
 113                         return this._mouseUp(event);
 114                 }
 115
 116                 if (this._mouseStarted) {
 117                         this._mouseDrag(event);
 118                         return event.preventDefault();
 119                 }
 120
 121                 if (this._mouseDistanceMet(event) && this._mouseDelayMet(event)) {
 122                         this._mouseStarted =
 123                                 (this._mouseStart(this._mouseDownEvent, event) !== false);
 124                         (this._mouseStarted ? this._mouseDrag(event) : this._mouseUp(event));
 125                 }
 126
 127                 return !this._mouseStarted;
 128         },
 129
 130         _mouseUp: function(event) {
 131                 $(document)
 132                         .unbind('mousemove.'+this.widgetName, this._mouseMoveDelegate)
 133                         .unbind('mouseup.'+this.widgetName, this._mouseUpDelegate);
 134
 135                 if (this._mouseStarted) {
 136                         this._mouseStarted = false;
 137
 138                         if (event.target == this._mouseDownEvent.target) {
 139                             $.data(event.target, this.widgetName + '.preventClickEvent', true);
 140                         }
 141
 142                         this._mouseStop(event);
 143                 }
 144
 145                 return false;
 146         },
 147
 148         _mouseDistanceMet: function(event) {
 149                 return (Math.max(
 150                                 Math.abs(this._mouseDownEvent.pageX - event.pageX),
 151                                 Math.abs(this._mouseDownEvent.pageY - event.pageY)
 152                         ) >= this.options.distance
 153                 );
 154         },
 155
 156         _mouseDelayMet: function(event) {
 157                 return this.mouseDelayMet;
 158         },
 159
 160         // These are placeholder methods, to be overriden by extending plugin
 161         _mouseStart: function(event) {},
 162         _mouseDrag: function(event) {},
 163         _mouseStop: function(event) {},
 164         _mouseCapture: function(event) { return true; }
 165 });
 166
 167 })(jQuery);