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756
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1 /*!
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2 * jQuery UI Mouse 1.8.9
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3 *
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4 * Copyright 2011, AUTHORS.txt (http://jqueryui.com/about)
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5 * Dual licensed under the MIT or GPL Version 2 licenses.
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6 * http://jquery.org/license
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7 *
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8 * http://docs.jquery.com/UI/Mouse
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9 *
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10 * Depends:
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11 * jquery.ui.widget.js
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12 */
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13 (function( $, undefined ) {
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14
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15 $.widget("ui.mouse", {
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16 options: {
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17 cancel: ':input,option',
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18 distance: 1,
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19 delay: 0
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20 },
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21 _mouseInit: function() {
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22 var self = this;
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23
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24 this.element
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25 .bind('mousedown.'+this.widgetName, function(event) {
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26 return self._mouseDown(event);
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27 })
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28 .bind('click.'+this.widgetName, function(event) {
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29 if (true === $.data(event.target, self.widgetName + '.preventClickEvent')) {
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30 $.removeData(event.target, self.widgetName + '.preventClickEvent');
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31 event.stopImmediatePropagation();
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32 return false;
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33 }
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34 });
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35
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36 this.started = false;
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37 },
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38
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39 // TODO: make sure destroying one instance of mouse doesn't mess with
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40 // other instances of mouse
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41 _mouseDestroy: function() {
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42 this.element.unbind('.'+this.widgetName);
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43 },
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44
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45 _mouseDown: function(event) {
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46 // don't let more than one widget handle mouseStart
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47 // TODO: figure out why we have to use originalEvent
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48 event.originalEvent = event.originalEvent || {};
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49 if (event.originalEvent.mouseHandled) { return; }
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50
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51 // we may have missed mouseup (out of window)
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52 (this._mouseStarted && this._mouseUp(event));
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53
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54 this._mouseDownEvent = event;
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55
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56 var self = this,
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57 btnIsLeft = (event.which == 1),
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58 elIsCancel = (typeof this.options.cancel == "string" ? $(event.target).parents().add(event.target).filter(this.options.cancel).length : false);
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59 if (!btnIsLeft || elIsCancel || !this._mouseCapture(event)) {
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60 return true;
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61 }
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62
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63 this.mouseDelayMet = !this.options.delay;
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64 if (!this.mouseDelayMet) {
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65 this._mouseDelayTimer = setTimeout(function() {
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66 self.mouseDelayMet = true;
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67 }, this.options.delay);
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68 }
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69
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70 if (this._mouseDistanceMet(event) && this._mouseDelayMet(event)) {
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71 this._mouseStarted = (this._mouseStart(event) !== false);
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72 if (!this._mouseStarted) {
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73 event.preventDefault();
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74 return true;
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75 }
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76 }
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77
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78 // these delegates are required to keep context
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79 this._mouseMoveDelegate = function(event) {
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80 return self._mouseMove(event);
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81 };
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82 this._mouseUpDelegate = function(event) {
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83 return self._mouseUp(event);
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84 };
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85 $(document)
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86 .bind('mousemove.'+this.widgetName, this._mouseMoveDelegate)
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87 .bind('mouseup.'+this.widgetName, this._mouseUpDelegate);
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88
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89 event.preventDefault();
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90 event.originalEvent.mouseHandled = true;
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91 return true;
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92 },
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93
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94 _mouseMove: function(event) {
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95 // IE mouseup check - mouseup happened when mouse was out of window
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96 if ($.browser.msie && !(document.documentMode >= 9) && !event.button) {
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97 return this._mouseUp(event);
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98 }
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99
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100 if (this._mouseStarted) {
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101 this._mouseDrag(event);
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102 return event.preventDefault();
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103 }
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104
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105 if (this._mouseDistanceMet(event) && this._mouseDelayMet(event)) {
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106 this._mouseStarted =
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107 (this._mouseStart(this._mouseDownEvent, event) !== false);
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108 (this._mouseStarted ? this._mouseDrag(event) : this._mouseUp(event));
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109 }
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110
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111 return !this._mouseStarted;
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112 },
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113
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114 _mouseUp: function(event) {
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115 $(document)
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116 .unbind('mousemove.'+this.widgetName, this._mouseMoveDelegate)
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117 .unbind('mouseup.'+this.widgetName, this._mouseUpDelegate);
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118
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119 if (this._mouseStarted) {
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120 this._mouseStarted = false;
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121
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122 if (event.target == this._mouseDownEvent.target) {
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123 $.data(event.target, this.widgetName + '.preventClickEvent', true);
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124 }
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125
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126 this._mouseStop(event);
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127 }
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128
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129 return false;
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130 },
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131
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132 _mouseDistanceMet: function(event) {
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133 return (Math.max(
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134 Math.abs(this._mouseDownEvent.pageX - event.pageX),
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135 Math.abs(this._mouseDownEvent.pageY - event.pageY)
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136 ) >= this.options.distance
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137 );
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138 },
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139
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140 _mouseDelayMet: function(event) {
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141 return this.mouseDelayMet;
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142 },
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143
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144 // These are placeholder methods, to be overriden by extending plugin
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145 _mouseStart: function(event) {},
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146 _mouseDrag: function(event) {},
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147 _mouseStop: function(event) {},
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148 _mouseCapture: function(event) { return true; }
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149 });
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150
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151 })(jQuery);
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