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

   1 /*!
   2  * jQuery UI Mouse 1.8.21
   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                 $(document)
  49                         .unbind('mousemove.'+this.widgetName, this._mouseMoveDelegate)
  50                         .unbind('mouseup.'+this.widgetName, this._mouseUpDelegate);
  51         },
  52
  53         _mouseDown: function(event) {
  54                 // don't let more than one widget handle mouseStart
  55                 if( mouseHandled ) { return };
  56
  57                 // we may have missed mouseup (out of window)
  58                 (this._mouseStarted && this._mouseUp(event));
  59
  60                 this._mouseDownEvent = event;
  61
  62                 var self = this,
  63                         btnIsLeft = (event.which == 1),
  64                         // event.target.nodeName works around a bug in IE 8 with
  65                         // disabled inputs (#7620)
  66                         elIsCancel = (typeof this.options.cancel == "string" && event.target.nodeName ? $(event.target).closest(this.options.cancel).length : false);
  67                 if (!btnIsLeft || elIsCancel || !this._mouseCapture(event)) {
  68                         return true;
  69                 }
  70
  71                 this.mouseDelayMet = !this.options.delay;
  72                 if (!this.mouseDelayMet) {
  73                         this._mouseDelayTimer = setTimeout(function() {
  74                                 self.mouseDelayMet = true;
  75                         }, this.options.delay);
  76                 }
  77
  78                 if (this._mouseDistanceMet(event) && this._mouseDelayMet(event)) {
  79                         this._mouseStarted = (this._mouseStart(event) !== false);
  80                         if (!this._mouseStarted) {
  81                                 event.preventDefault();
  82                                 return true;
  83                         }
  84                 }
  85
  86                 // Click event may never have fired (Gecko & Opera)
  87                 if (true === $.data(event.target, this.widgetName + '.preventClickEvent')) {
  88                         $.removeData(event.target, this.widgetName + '.preventClickEvent');
  89                 }
  90
  91                 // these delegates are required to keep context
  92                 this._mouseMoveDelegate = function(event) {
  93                         return self._mouseMove(event);
  94                 };
  95                 this._mouseUpDelegate = function(event) {
  96                         return self._mouseUp(event);
  97                 };
  98                 $(document)
  99                         .bind('mousemove.'+this.widgetName, this._mouseMoveDelegate)
 100                         .bind('mouseup.'+this.widgetName, this._mouseUpDelegate);
 101
 102                 event.preventDefault();
 103
 104                 mouseHandled = true;
 105                 return true;
 106         },
 107
 108         _mouseMove: function(event) {
 109                 // IE mouseup check - mouseup happened when mouse was out of window
 110                 if ($.browser.msie && !(document.documentMode >= 9) && !event.button) {
 111                         return this._mouseUp(event);
 112                 }
 113
 114                 if (this._mouseStarted) {
 115                         this._mouseDrag(event);
 116                         return event.preventDefault();
 117                 }
 118
 119                 if (this._mouseDistanceMet(event) && this._mouseDelayMet(event)) {
 120                         this._mouseStarted =
 121                                 (this._mouseStart(this._mouseDownEvent, event) !== false);
 122                         (this._mouseStarted ? this._mouseDrag(event) : this._mouseUp(event));
 123                 }
 124
 125                 return !this._mouseStarted;
 126         },
 127
 128         _mouseUp: function(event) {
 129                 $(document)
 130                         .unbind('mousemove.'+this.widgetName, this._mouseMoveDelegate)
 131                         .unbind('mouseup.'+this.widgetName, this._mouseUpDelegate);
 132
 133                 if (this._mouseStarted) {
 134                         this._mouseStarted = false;
 135
 136                         if (event.target == this._mouseDownEvent.target) {
 137                             $.data(event.target, this.widgetName + '.preventClickEvent', true);
 138                         }
 139
 140                         this._mouseStop(event);
 141                 }
 142
 143                 return false;
 144         },
 145
 146         _mouseDistanceMet: function(event) {
 147                 return (Math.max(
 148                                 Math.abs(this._mouseDownEvent.pageX - event.pageX),
 149                                 Math.abs(this._mouseDownEvent.pageY - event.pageY)
 150                         ) >= this.options.distance
 151                 );
 152         },
 153
 154         _mouseDelayMet: function(event) {
 155                 return this.mouseDelayMet;
 156         },
 157
 158         // These are placeholder methods, to be overriden by extending plugin
 159         _mouseStart: function(event) {},
 160         _mouseDrag: function(event) {},
 161         _mouseStop: function(event) {},
 162         _mouseCapture: function(event) { return true; }
 163 });
 164
 165 })(jQuery);