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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 | /* Copyright (c) 2006-2008 MetaCarta, Inc., published under the Clear BSD * license. See http://svn.openlayers.org/trunk/openlayers/license.txt for the * full text of the license. */ /** * @requires OpenLayers/Control/ZoomBox.js * @requires OpenLayers/Control/DragPan.js * @requires OpenLayers/Handler/MouseWheel.js * @requires OpenLayers/Handler/Click.js */ /** * Class: OpenLayers.Control.Navigation * The navigation control handles map browsing with mouse events (dragging, * double-clicking, and scrolling the wheel). Create a new navigation * control with the <OpenLayers.Control.Navigation> control. * * Note that this control is added to the map by default (if no controls * array is sent in the options object to the <OpenLayers.Map> * constructor). * * Inherits: * - <OpenLayers.Control> */ OpenLayers.Control.Navigation = OpenLayers.Class(OpenLayers.Control, { /** * Property: dragPan * {<OpenLayers.Control.DragPan>} */ dragPan: null, /** * APIProprety: dragPanOptions * {Object} Options passed to the DragPan control. */ dragPanOptions: null, /** * Property: zoomBox * {<OpenLayers.Control.ZoomBox>} */ zoomBox: null, /** * APIProperty: zoomWheelEnabled * {Boolean} Whether the mousewheel should zoom the map */ zoomWheelEnabled: true, /** * APIProperty: handleRightClicks * {Boolean} Whether or not to handle right clicks. Default is false. */ handleRightClicks: false, /** * APIProperty: zoomBoxKeyMask * {Integer} <OpenLayers.Handler> key code of the key, which has to be * pressed, while drawing the zoom box with the mouse on the screen. * You should probably set handleRightClicks to true if you use this * with MOD_CTRL, to disable the context menu for machines which use * CTRL-Click as a right click. * Default: <OpenLayers.Handler.MOD_SHIFT */ zoomBoxKeyMask: OpenLayers.Handler.MOD_SHIFT, /** * Constructor: OpenLayers.Control.Navigation * Create a new navigation control * * Parameters: * options - {Object} An optional object whose properties will be set on * the control */ initialize: function(options) { this.handlers = {}; OpenLayers.Control.prototype.initialize.apply(this, arguments); }, /** * Method: destroy * The destroy method is used to perform any clean up before the control * is dereferenced. Typically this is where event listeners are removed * to prevent memory leaks. */ destroy: function() { this.deactivate(); if (this.dragPan) { this.dragPan.destroy(); } this.dragPan = null; if (this.zoomBox) { this.zoomBox.destroy(); } this.zoomBox = null; OpenLayers.Control.prototype.destroy.apply(this,arguments); }, /** * Method: activate */ activate: function() { this.dragPan.activate(); if (this.zoomWheelEnabled) { this.handlers.wheel.activate(); } this.handlers.click.activate(); this.zoomBox.activate(); return OpenLayers.Control.prototype.activate.apply(this,arguments); }, /** * Method: deactivate */ deactivate: function() { this.zoomBox.deactivate(); this.dragPan.deactivate(); this.handlers.click.deactivate(); this.handlers.wheel.deactivate(); return OpenLayers.Control.prototype.deactivate.apply(this,arguments); }, /** * Method: draw */ draw: function() { // disable right mouse context menu for support of right click events if (this.handleRightClicks) { this.map.viewPortDiv.oncontextmenu = function () { return false;}; } var clickCallbacks = { 'dblclick': this.defaultDblClick, 'dblrightclick': this.defaultDblRightClick }; var clickOptions = { 'double': true, 'stopDouble': true }; this.handlers.click = new OpenLayers.Handler.Click( this, clickCallbacks, clickOptions ); this.dragPan = new OpenLayers.Control.DragPan( OpenLayers.Util.extend({map: this.map}, this.dragPanOptions) ); this.zoomBox = new OpenLayers.Control.ZoomBox( {map: this.map, keyMask: this.zoomBoxKeyMask}); this.dragPan.draw(); this.zoomBox.draw(); this.handlers.wheel = new OpenLayers.Handler.MouseWheel( this, {"up" : this.wheelUp, "down": this.wheelDown} ); this.activate(); }, /** * Method: defaultDblClick * * Parameters: * evt - {Event} */ defaultDblClick: function (evt) { var newCenter = this.map.getLonLatFromViewPortPx( evt.xy ); this.map.setCenter(newCenter, this.map.zoom + 1); }, /** * Method: defaultDblRightClick * * Parameters: * evt - {Event} */ defaultDblRightClick: function (evt) { var newCenter = this.map.getLonLatFromViewPortPx( evt.xy ); this.map.setCenter(newCenter, this.map.zoom - 1); }, /** * Method: wheelChange * * Parameters: * evt - {Event} * deltaZ - {Integer} */ wheelChange: function(evt, deltaZ) { var newZoom = this.map.getZoom() + deltaZ; if (!this.map.isValidZoomLevel(newZoom)) { return; } var size = this.map.getSize(); var deltaX = size.w/2 - evt.xy.x; var deltaY = evt.xy.y - size.h/2; var newRes = this.map.baseLayer.getResolutionForZoom(newZoom); var zoomPoint = this.map.getLonLatFromPixel(evt.xy); var newCenter = new OpenLayers.LonLat( zoomPoint.lon + deltaX * newRes, zoomPoint.lat + deltaY * newRes ); this.map.setCenter( newCenter, newZoom ); }, /** * Method: wheelUp * User spun scroll wheel up * * Parameters: * evt - {Event} */ wheelUp: function(evt) { this.wheelChange(evt, 1); }, /** * Method: wheelDown * User spun scroll wheel down * * Parameters: * evt - {Event} */ wheelDown: function(evt) { this.wheelChange(evt, -1); }, /** * Method: disableZoomWheel */ disableZoomWheel : function() { this.zoomWheelEnabled = false; this.handlers.wheel.deactivate(); }, /** * Method: enableZoomWheel */ enableZoomWheel : function() { this.zoomWheelEnabled = true; if (this.active) { this.handlers.wheel.activate(); } }, CLASS_NAME: "OpenLayers.Control.Navigation" }); |