js/jqueryui/jquery.ui.mouse.js

   1 /*!
   2  * jquery UI Mouse 1.8.4
   3  *
   4  * Copyright 2010, 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 $.widget("ui.mouse", {
  16         options: {
  17                 cancel: ':input,option',
  18                 distance: 1,
  19                 delay: 0
  20         },
  21         _mouseInit: function() {
  22                 var self = this;
  23
  24                 this.element
  25                         .bind('mousedown.'+this.widgetName, function(event) {
  26                                 return self._mouseDown(event);
  27                         })
  28                         .bind('click.'+this.widgetName, function(event) {
  29                                 if(self._preventClickEvent) {
  30                                         self._preventClickEvent = false;
  31                                         event.stopImmediatePropagation();
  32                                         return false;
  33                                 }
  34                         });
  35
  36                 this.started = false;
  37         },
  38
  39         // TODO: make sure destroying one instance of mouse doesn't mess with
  40         // other instances of mouse
  41         _mouseDestroy: function() {
  42                 this.element.unbind('.'+this.widgetName);
  43         },
  44
  45         _mouseDown: function(event) {
  46                 // don't let more than one widget handle mouseStart
  47                 // TODO: figure out why we have to use originalEvent
  48                 event.originalEvent = event.originalEvent || {};
  49                 if (event.originalEvent.mouseHandled) { return; }
  50
  51                 // we may have missed mouseup (out of window)
  52                 (this._mouseStarted && this._mouseUp(event));
  53
  54                 this._mouseDownEvent = event;
  55
  56                 var self = this,
  57                         btnIsLeft = (event.which == 1),
  58                         elIsCancel = (typeof this.options.cancel == "string" ? $(event.target).parents().add(event.target).filter(this.options.cancel).length : false);
  59                 if (!btnIsLeft || elIsCancel || !this._mouseCapture(event)) {
  60                         return true;
  61                 }
  62
  63                 this.mouseDelayMet = !this.options.delay;
  64                 if (!this.mouseDelayMet) {
  65                         this._mouseDelayTimer = setTimeout(function() {
  66                                 self.mouseDelayMet = true;
  67                         }, this.options.delay);
  68                 }
  69
  70                 if (this._mouseDistanceMet(event) && this._mouseDelayMet(event)) {
  71                         this._mouseStarted = (this._mouseStart(event) !== false);
  72                         if (!this._mouseStarted) {
  73                                 event.preventDefault();
  74                                 return true;
  75                         }
  76                 }
  77
  78                 // these delegates are required to keep context
  79                 this._mouseMoveDelegate = function(event) {
  80                         return self._mouseMove(event);
  81                 };
  82                 this._mouseUpDelegate = function(event) {
  83                         return self._mouseUp(event);
  84                 };
  85                 $(document)
  86                         .bind('mousemove.'+this.widgetName, this._mouseMoveDelegate)
  87                         .bind('mouseup.'+this.widgetName, this._mouseUpDelegate);
  88
  89                 // preventDefault() is used to prevent the selection of text here -
  90                 // however, in Safari, this causes select boxes not to be selectable
  91                 // anymore, so this fix is needed
  92                 ($.browser.safari || event.preventDefault());
  93
  94                 event.originalEvent.mouseHandled = true;
  95                 return true;
  96         },
  97
  98         _mouseMove: function(event) {
  99                 // IE mouseup check - mouseup happened when mouse was out of window
 100                 if ($.browser.msie && !event.button) {
 101                         return this._mouseUp(event);
 102                 }
 103
 104                 if (this._mouseStarted) {
 105                         this._mouseDrag(event);
 106                         return event.preventDefault();
 107                 }
 108
 109                 if (this._mouseDistanceMet(event) && this._mouseDelayMet(event)) {
 110                         this._mouseStarted =
 111                                 (this._mouseStart(this._mouseDownEvent, event) !== false);
 112                         (this._mouseStarted ? this._mouseDrag(event) : this._mouseUp(event));
 113                 }
 114
 115                 return !this._mouseStarted;
 116         },
 117
 118         _mouseUp: function(event) {
 119                 $(document)
 120                         .unbind('mousemove.'+this.widgetName, this._mouseMoveDelegate)
 121                         .unbind('mouseup.'+this.widgetName, this._mouseUpDelegate);
 122
 123                 if (this._mouseStarted) {
 124                         this._mouseStarted = false;
 125                         this._preventClickEvent = (event.target == this._mouseDownEvent.target);
 126                         this._mouseStop(event);
 127                 }
 128
 129                 return false;
 130         },
 131
 132         _mouseDistanceMet: function(event) {
 133                 return (Math.max(
 134                                 Math.abs(this._mouseDownEvent.pageX - event.pageX),
 135                                 Math.abs(this._mouseDownEvent.pageY - event.pageY)
 136                         ) >= this.options.distance
 137                 );
 138         },
 139
 140         _mouseDelayMet: function(event) {
 141                 return this.mouseDelayMet;
 142         },
 143
 144         // These are placeholder methods, to be overriden by extending plugin
 145         _mouseStart: function(event) {},
 146         _mouseDrag: function(event) {},
 147         _mouseStop: function(event) {},
 148         _mouseCapture: function(event) { return true; }
 149 });
 150
 151 })(jquery);