1 | /* Copyright (c) 2006-2010 by OpenLayers Contributors (see authors.txt for |
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2 | * full list of contributors). Published under the Clear BSD license. |
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3 | * See http://svn.openlayers.org/trunk/openlayers/license.txt for the |
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4 | * full text of the license. */ |
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5 | |
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6 | /** |
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7 | * @requires OpenLayers/Control.js |
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8 | */ |
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9 | |
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10 | /** |
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11 | * Class: OpenLayers.Control.MouseDefaults |
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12 | * This class is DEPRECATED in 2.4 and will be removed by 3.0. |
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13 | * If you need this functionality, use <OpenLayers.Control.Navigation> |
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14 | * instead!!! |
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15 | * |
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16 | * This class is DEPRECATED in 2.4 and will be removed by 3.0. |
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17 | * If you need this functionality, use Control.Navigation instead!!! |
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18 | * |
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19 | * Inherits from: |
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20 | * - <OpenLayers.Control> |
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21 | */ |
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22 | OpenLayers.Control.MouseDefaults = OpenLayers.Class(OpenLayers.Control, { |
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23 | |
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24 | /** WARNING WARNING WARNING!!! |
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25 | This class is DEPRECATED in 2.4 and will be removed by 3.0. |
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26 | If you need this functionality, use Control.Navigation instead!!! */ |
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27 | |
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28 | /** |
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29 | * Property: performedDrag |
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30 | * {Boolean} |
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31 | */ |
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32 | performedDrag: false, |
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33 | |
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34 | /** |
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35 | * Property: wheelObserver |
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36 | * {Function} |
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37 | */ |
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38 | wheelObserver: null, |
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39 | |
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40 | /** |
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41 | * Constructor: OpenLayers.Control.MouseDefaults |
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42 | */ |
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43 | initialize: function() { |
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44 | OpenLayers.Control.prototype.initialize.apply(this, arguments); |
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45 | }, |
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46 | |
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47 | /** |
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48 | * APIMethod: destroy |
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49 | */ |
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50 | destroy: function() { |
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51 | |
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52 | if (this.handler) { |
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53 | this.handler.destroy(); |
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54 | } |
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55 | this.handler = null; |
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56 | |
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57 | this.map.events.un({ |
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58 | "click": this.defaultClick, |
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59 | "dblclick": this.defaultDblClick, |
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60 | "mousedown": this.defaultMouseDown, |
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61 | "mouseup": this.defaultMouseUp, |
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62 | "mousemove": this.defaultMouseMove, |
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63 | "mouseout": this.defaultMouseOut, |
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64 | scope: this |
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65 | }); |
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66 | |
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67 | //unregister mousewheel events specifically on the window and document |
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68 | OpenLayers.Event.stopObserving(window, "DOMMouseScroll", |
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69 | this.wheelObserver); |
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70 | OpenLayers.Event.stopObserving(window, "mousewheel", |
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71 | this.wheelObserver); |
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72 | OpenLayers.Event.stopObserving(document, "mousewheel", |
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73 | this.wheelObserver); |
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74 | this.wheelObserver = null; |
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75 | |
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76 | OpenLayers.Control.prototype.destroy.apply(this, arguments); |
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77 | }, |
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78 | |
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79 | /** |
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80 | * Method: draw |
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81 | */ |
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82 | draw: function() { |
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83 | this.map.events.on({ |
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84 | "click": this.defaultClick, |
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85 | "dblclick": this.defaultDblClick, |
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86 | "mousedown": this.defaultMouseDown, |
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87 | "mouseup": this.defaultMouseUp, |
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88 | "mousemove": this.defaultMouseMove, |
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89 | "mouseout": this.defaultMouseOut, |
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90 | scope: this |
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91 | }); |
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92 | |
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93 | this.registerWheelEvents(); |
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94 | |
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95 | }, |
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96 | |
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97 | /** |
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98 | * Method: registerWheelEvents |
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99 | */ |
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100 | registerWheelEvents: function() { |
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101 | |
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102 | this.wheelObserver = OpenLayers.Function.bindAsEventListener( |
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103 | this.onWheelEvent, this |
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104 | ); |
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105 | |
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106 | //register mousewheel events specifically on the window and document |
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107 | OpenLayers.Event.observe(window, "DOMMouseScroll", this.wheelObserver); |
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108 | OpenLayers.Event.observe(window, "mousewheel", this.wheelObserver); |
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109 | OpenLayers.Event.observe(document, "mousewheel", this.wheelObserver); |
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110 | }, |
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111 | |
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112 | /** |
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113 | * Method: defaultClick |
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114 | * |
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115 | * Parameters: |
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116 | * evt - {Event} |
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117 | * |
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118 | * Returns: |
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119 | * {Boolean} |
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120 | */ |
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121 | defaultClick: function (evt) { |
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122 | if (!OpenLayers.Event.isLeftClick(evt)) { |
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123 | return; |
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124 | } |
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125 | var notAfterDrag = !this.performedDrag; |
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126 | this.performedDrag = false; |
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127 | return notAfterDrag; |
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128 | }, |
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129 | |
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130 | /** |
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131 | * Method: defaultDblClick |
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132 | * |
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133 | * Parameters: |
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134 | * evt - {Event} |
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135 | */ |
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136 | defaultDblClick: function (evt) { |
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137 | var newCenter = this.map.getLonLatFromViewPortPx( evt.xy ); |
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138 | this.map.setCenter(newCenter, this.map.zoom + 1); |
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139 | OpenLayers.Event.stop(evt); |
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140 | return false; |
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141 | }, |
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142 | |
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143 | /** |
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144 | * Method: defaultMouseDown |
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145 | * |
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146 | * Parameters: |
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147 | * evt - {Event} |
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148 | */ |
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149 | defaultMouseDown: function (evt) { |
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150 | if (!OpenLayers.Event.isLeftClick(evt)) { |
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151 | return; |
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152 | } |
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153 | this.mouseDragStart = evt.xy.clone(); |
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154 | this.performedDrag = false; |
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155 | if (evt.shiftKey) { |
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156 | this.map.div.style.cursor = "crosshair"; |
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157 | this.zoomBox = OpenLayers.Util.createDiv('zoomBox', |
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158 | this.mouseDragStart, |
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159 | null, |
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160 | null, |
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161 | "absolute", |
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162 | "2px solid red"); |
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163 | this.zoomBox.style.backgroundColor = "white"; |
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164 | this.zoomBox.style.filter = "alpha(opacity=50)"; // IE |
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165 | this.zoomBox.style.opacity = "0.50"; |
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166 | this.zoomBox.style.fontSize = "1px"; |
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167 | this.zoomBox.style.zIndex = this.map.Z_INDEX_BASE["Popup"] - 1; |
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168 | this.map.viewPortDiv.appendChild(this.zoomBox); |
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169 | } |
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170 | document.onselectstart = OpenLayers.Function.False; |
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171 | OpenLayers.Event.stop(evt); |
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172 | }, |
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173 | |
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174 | /** |
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175 | * Method: defaultMouseMove |
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176 | * |
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177 | * Parameters: |
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178 | * evt - {Event} |
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179 | */ |
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180 | defaultMouseMove: function (evt) { |
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181 | // record the mouse position, used in onWheelEvent |
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182 | this.mousePosition = evt.xy.clone(); |
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183 | |
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184 | if (this.mouseDragStart != null) { |
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185 | if (this.zoomBox) { |
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186 | var deltaX = Math.abs(this.mouseDragStart.x - evt.xy.x); |
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187 | var deltaY = Math.abs(this.mouseDragStart.y - evt.xy.y); |
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188 | this.zoomBox.style.width = Math.max(1, deltaX) + "px"; |
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189 | this.zoomBox.style.height = Math.max(1, deltaY) + "px"; |
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190 | if (evt.xy.x < this.mouseDragStart.x) { |
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191 | this.zoomBox.style.left = evt.xy.x+"px"; |
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192 | } |
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193 | if (evt.xy.y < this.mouseDragStart.y) { |
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194 | this.zoomBox.style.top = evt.xy.y+"px"; |
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195 | } |
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196 | } else { |
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197 | var deltaX = this.mouseDragStart.x - evt.xy.x; |
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198 | var deltaY = this.mouseDragStart.y - evt.xy.y; |
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199 | var size = this.map.getSize(); |
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200 | var newXY = new OpenLayers.Pixel(size.w / 2 + deltaX, |
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201 | size.h / 2 + deltaY); |
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202 | var newCenter = this.map.getLonLatFromViewPortPx( newXY ); |
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203 | this.map.setCenter(newCenter, null, true); |
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204 | this.mouseDragStart = evt.xy.clone(); |
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205 | this.map.div.style.cursor = "move"; |
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206 | } |
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207 | this.performedDrag = true; |
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208 | } |
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209 | }, |
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210 | |
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211 | /** |
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212 | * Method: defaultMouseUp |
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213 | * |
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214 | * Parameters: |
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215 | * evt - {<OpenLayers.Event>} |
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216 | */ |
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217 | defaultMouseUp: function (evt) { |
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218 | if (!OpenLayers.Event.isLeftClick(evt)) { |
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219 | return; |
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220 | } |
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221 | if (this.zoomBox) { |
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222 | this.zoomBoxEnd(evt); |
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223 | } else { |
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224 | if (this.performedDrag) { |
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225 | this.map.setCenter(this.map.center); |
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226 | } |
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227 | } |
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228 | document.onselectstart=null; |
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229 | this.mouseDragStart = null; |
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230 | this.map.div.style.cursor = ""; |
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231 | }, |
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232 | |
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233 | /** |
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234 | * Method: defaultMouseOut |
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235 | * |
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236 | * Parameters: |
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237 | * evt - {Event} |
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238 | */ |
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239 | defaultMouseOut: function (evt) { |
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240 | if (this.mouseDragStart != null && |
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241 | OpenLayers.Util.mouseLeft(evt, this.map.div)) { |
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242 | if (this.zoomBox) { |
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243 | this.removeZoomBox(); |
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244 | } |
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245 | this.mouseDragStart = null; |
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246 | } |
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247 | }, |
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248 | |
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249 | |
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250 | /** |
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251 | * Method: defaultWheelUp |
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252 | * User spun scroll wheel up |
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253 | * |
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254 | */ |
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255 | defaultWheelUp: function(evt) { |
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256 | if (this.map.getZoom() <= this.map.getNumZoomLevels()) { |
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257 | this.map.setCenter(this.map.getLonLatFromPixel(evt.xy), |
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258 | this.map.getZoom() + 1); |
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259 | } |
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260 | }, |
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261 | |
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262 | /** |
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263 | * Method: defaultWheelDown |
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264 | * User spun scroll wheel down |
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265 | */ |
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266 | defaultWheelDown: function(evt) { |
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267 | if (this.map.getZoom() > 0) { |
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268 | this.map.setCenter(this.map.getLonLatFromPixel(evt.xy), |
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269 | this.map.getZoom() - 1); |
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270 | } |
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271 | }, |
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272 | |
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273 | /** |
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274 | * Method: zoomBoxEnd |
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275 | * Zoombox function. |
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276 | */ |
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277 | zoomBoxEnd: function(evt) { |
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278 | if (this.mouseDragStart != null) { |
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279 | if (Math.abs(this.mouseDragStart.x - evt.xy.x) > 5 || |
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280 | Math.abs(this.mouseDragStart.y - evt.xy.y) > 5) { |
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281 | var start = this.map.getLonLatFromViewPortPx( this.mouseDragStart ); |
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282 | var end = this.map.getLonLatFromViewPortPx( evt.xy ); |
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283 | var top = Math.max(start.lat, end.lat); |
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284 | var bottom = Math.min(start.lat, end.lat); |
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285 | var left = Math.min(start.lon, end.lon); |
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286 | var right = Math.max(start.lon, end.lon); |
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287 | var bounds = new OpenLayers.Bounds(left, bottom, right, top); |
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288 | this.map.zoomToExtent(bounds); |
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289 | } else { |
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290 | var end = this.map.getLonLatFromViewPortPx( evt.xy ); |
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291 | this.map.setCenter(new OpenLayers.LonLat( |
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292 | (end.lon), |
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293 | (end.lat) |
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294 | ), this.map.getZoom() + 1); |
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295 | } |
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296 | this.removeZoomBox(); |
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297 | } |
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298 | }, |
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299 | |
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300 | /** |
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301 | * Method: removeZoomBox |
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302 | * Remove the zoombox from the screen and nullify our reference to it. |
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303 | */ |
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304 | removeZoomBox: function() { |
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305 | this.map.viewPortDiv.removeChild(this.zoomBox); |
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306 | this.zoomBox = null; |
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307 | }, |
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308 | |
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309 | |
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310 | /** |
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311 | * Mouse ScrollWheel code thanks to http://adomas.org/javascript-mouse-wheel/ |
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312 | */ |
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313 | |
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314 | |
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315 | /** |
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316 | * Method: onWheelEvent |
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317 | * Catch the wheel event and handle it xbrowserly |
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318 | * |
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319 | * Parameters: |
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320 | * e - {Event} |
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321 | */ |
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322 | onWheelEvent: function(e){ |
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323 | |
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324 | // first determine whether or not the wheeling was inside the map |
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325 | var inMap = false; |
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326 | var elem = OpenLayers.Event.element(e); |
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327 | while(elem != null) { |
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328 | if (this.map && elem == this.map.div) { |
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329 | inMap = true; |
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330 | break; |
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331 | } |
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332 | elem = elem.parentNode; |
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333 | } |
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334 | |
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335 | if (inMap) { |
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336 | |
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337 | var delta = 0; |
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338 | if (!e) { |
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339 | e = window.event; |
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340 | } |
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341 | if (e.wheelDelta) { |
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342 | delta = e.wheelDelta/120; |
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343 | if (window.opera && window.opera.version() < 9.2) { |
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344 | delta = -delta; |
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345 | } |
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346 | } else if (e.detail) { |
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347 | delta = -e.detail / 3; |
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348 | } |
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349 | if (delta) { |
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350 | // add the mouse position to the event because mozilla has a bug |
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351 | // with clientX and clientY (see https://bugzilla.mozilla.org/show_bug.cgi?id=352179) |
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352 | // getLonLatFromViewPortPx(e) returns wrong values |
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353 | e.xy = this.mousePosition; |
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354 | |
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355 | if (delta < 0) { |
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356 | this.defaultWheelDown(e); |
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357 | } else { |
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358 | this.defaultWheelUp(e); |
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359 | } |
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360 | } |
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361 | |
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362 | //only wheel the map, not the window |
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363 | OpenLayers.Event.stop(e); |
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364 | } |
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365 | }, |
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366 | |
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367 | CLASS_NAME: "OpenLayers.Control.MouseDefaults" |
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368 | }); |
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