external/jquery.ui.mouse.js

   1 /*!
   2  * jQuery UI Mouse 1.8.17
   3  *
   4  * Copyright 2011, 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         },
  49
  50         _mouseDown: function(event) {
  51                 // don't let more than one widget handle mouseStart
  52                 if( mouseHandled ) { return };
  53
  54                 // we may have missed mouseup (out of window)
  55                 (this._mouseStarted && this._mouseUp(event));
  56
  57                 this._mouseDownEvent = event;
  58
  59                 var self = this,
  60                         btnIsLeft = (event.which == 1),
  61                         // event.target.nodeName works around a bug in IE 8 with
  62                         // disabled inputs (#7620)
  63                         elIsCancel = (typeof this.options.cancel == "string" && event.target.nodeName ? $(event.target).closest(this.options.cancel).length : false);
  64                 if (!btnIsLeft || elIsCancel || !this._mouseCapture(event)) {
  65                         return true;
  66                 }
  67
  68                 this.mouseDelayMet = !this.options.delay;
  69                 if (!this.mouseDelayMet) {
  70                         this._mouseDelayTimer = setTimeout(function() {
  71                                 self.mouseDelayMet = true;
  72                         }, this.options.delay);
  73                 }
  74
  75                 if (this._mouseDistanceMet(event) && this._mouseDelayMet(event)) {
  76                         this._mouseStarted = (this._mouseStart(event) !== false);
  77                         if (!this._mouseStarted) {
  78                                 event.preventDefault();
  79                                 return true;
  80                         }
  81                 }
  82
  83                 // Click event may never have fired (Gecko & Opera)
  84                 if (true === $.data(event.target, this.widgetName + '.preventClickEvent')) {
  85                         $.removeData(event.target, this.widgetName + '.preventClickEvent');
  86                 }
  87
  88                 // these delegates are required to keep context
  89                 this._mouseMoveDelegate = function(event) {
  90                         return self._mouseMove(event);
  91                 };
  92                 this._mouseUpDelegate = function(event) {
  93                         return self._mouseUp(event);
  94                 };
  95                 $(document)
  96                         .bind('mousemove.'+this.widgetName, this._mouseMoveDelegate)
  97                         .bind('mouseup.'+this.widgetName, this._mouseUpDelegate);
  98
  99                 event.preventDefault();
 100
 101                 mouseHandled = true;
 102                 return true;
 103         },
 104
 105         _mouseMove: function(event) {
 106                 // IE mouseup check - mouseup happened when mouse was out of window
 107                 if ($.browser.msie && !(document.documentMode >= 9) && !event.button) {
 108                         return this._mouseUp(event);
 109                 }
 110
 111                 if (this._mouseStarted) {
 112                         this._mouseDrag(event);
 113                         return event.preventDefault();
 114                 }
 115
 116                 if (this._mouseDistanceMet(event) && this._mouseDelayMet(event)) {
 117                         this._mouseStarted =
 118                                 (this._mouseStart(this._mouseDownEvent, event) !== false);
 119                         (this._mouseStarted ? this._mouseDrag(event) : this._mouseUp(event));
 120                 }
 121
 122                 return !this._mouseStarted;
 123         },
 124
 125         _mouseUp: function(event) {
 126                 $(document)
 127                         .unbind('mousemove.'+this.widgetName, this._mouseMoveDelegate)
 128                         .unbind('mouseup.'+this.widgetName, this._mouseUpDelegate);
 129
 130                 if (this._mouseStarted) {
 131                         this._mouseStarted = false;
 132
 133                         if (event.target == this._mouseDownEvent.target) {
 134                             $.data(event.target, this.widgetName + '.preventClickEvent', true);
 135                         }
 136
 137                         this._mouseStop(event);
 138                 }
 139
 140                 return false;
 141         },
 142
 143         _mouseDistanceMet: function(event) {
 144                 return (Math.max(
 145                                 Math.abs(this._mouseDownEvent.pageX - event.pageX),
 146                                 Math.abs(this._mouseDownEvent.pageY - event.pageY)
 147                         ) >= this.options.distance
 148                 );
 149         },
 150
 151         _mouseDelayMet: function(event) {
 152                 return this.mouseDelayMet;
 153         },
 154
 155         // These are placeholder methods, to be overriden by extending plugin
 156         _mouseStart: function(event) {},
 157         _mouseDrag: function(event) {},
 158         _mouseStop: function(event) {},
 159         _mouseCapture: function(event) { return true; }
 160 });
 161
 162 })(jQuery);