[76] | 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 | /** |
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| 8 | * @requires OpenLayers/Control.js |
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| 9 | */ |
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| 10 | |
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| 11 | /** |
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| 12 | * Class: OpenLayers.Control.PanZoom |
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| 13 | * The PanZoom is a visible control, composed of a |
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| 14 | * <OpenLayers.Control.PanPanel> and a <OpenLayers.Control.ZoomPanel>. By |
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| 15 | * default it is drawn in the upper left corner of the map. |
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| 16 | * |
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| 17 | * Inherits from: |
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| 18 | * - <OpenLayers.Control> |
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| 19 | */ |
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| 20 | OpenLayers.Control.PanZoom = OpenLayers.Class(OpenLayers.Control, { |
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| 21 | |
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| 22 | /** |
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| 23 | * APIProperty: slideFactor |
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| 24 | * {Integer} Number of pixels by which we'll pan the map in any direction |
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| 25 | * on clicking the arrow buttons. If you want to pan by some ratio |
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| 26 | * of the map dimensions, use <slideRatio> instead. |
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| 27 | */ |
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| 28 | slideFactor: 50, |
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| 29 | |
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| 30 | /** |
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| 31 | * APIProperty: slideRatio |
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| 32 | * {Number} The fraction of map width/height by which we'll pan the map |
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| 33 | * on clicking the arrow buttons. Default is null. If set, will |
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| 34 | * override <slideFactor>. E.g. if slideRatio is .5, then the Pan Up |
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| 35 | * button will pan up half the map height. |
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| 36 | */ |
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| 37 | slideRatio: null, |
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| 38 | |
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| 39 | /** |
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| 40 | * Property: buttons |
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| 41 | * {Array(DOMElement)} Array of Button Divs |
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| 42 | */ |
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| 43 | buttons: null, |
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| 44 | |
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| 45 | /** |
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| 46 | * Property: position |
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| 47 | * {<OpenLayers.Pixel>} |
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| 48 | */ |
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| 49 | position: null, |
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| 50 | |
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| 51 | /** |
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| 52 | * Constructor: OpenLayers.Control.PanZoom |
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| 53 | * |
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| 54 | * Parameters: |
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| 55 | * options - {Object} |
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| 56 | */ |
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| 57 | initialize: function(options) { |
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| 58 | this.position = new OpenLayers.Pixel(OpenLayers.Control.PanZoom.X, |
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| 59 | OpenLayers.Control.PanZoom.Y); |
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| 60 | OpenLayers.Control.prototype.initialize.apply(this, arguments); |
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| 61 | }, |
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| 62 | |
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| 63 | /** |
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| 64 | * APIMethod: destroy |
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| 65 | */ |
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| 66 | destroy: function() { |
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| 67 | OpenLayers.Control.prototype.destroy.apply(this, arguments); |
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| 68 | this.removeButtons(); |
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| 69 | this.buttons = null; |
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| 70 | this.position = null; |
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| 71 | }, |
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| 72 | |
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| 73 | /** |
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| 74 | * Method: draw |
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| 75 | * |
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| 76 | * Parameters: |
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| 77 | * px - {<OpenLayers.Pixel>} |
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| 78 | * |
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| 79 | * Returns: |
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| 80 | * {DOMElement} A reference to the container div for the PanZoom control. |
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| 81 | */ |
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| 82 | draw: function(px) { |
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| 83 | // initialize our internal div |
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| 84 | OpenLayers.Control.prototype.draw.apply(this, arguments); |
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| 85 | px = this.position; |
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| 86 | |
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| 87 | // place the controls |
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| 88 | this.buttons = []; |
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| 89 | |
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| 90 | var sz = new OpenLayers.Size(18,18); |
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| 91 | var centered = new OpenLayers.Pixel(px.x+sz.w/2, px.y); |
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| 92 | |
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| 93 | this._addButton("panup", "north-mini.png", centered, sz); |
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| 94 | px.y = centered.y+sz.h; |
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| 95 | this._addButton("panleft", "west-mini.png", px, sz); |
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| 96 | this._addButton("panright", "east-mini.png", px.add(sz.w, 0), sz); |
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| 97 | this._addButton("pandown", "south-mini.png", |
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| 98 | centered.add(0, sz.h*2), sz); |
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| 99 | this._addButton("zoomin", "zoom-plus-mini.png", |
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| 100 | centered.add(0, sz.h*3+5), sz); |
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| 101 | this._addButton("zoomworld", "zoom-world-mini.png", |
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| 102 | centered.add(0, sz.h*4+5), sz); |
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| 103 | this._addButton("zoomout", "zoom-minus-mini.png", |
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| 104 | centered.add(0, sz.h*5+5), sz); |
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| 105 | return this.div; |
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| 106 | }, |
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| 107 | |
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| 108 | /** |
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| 109 | * Method: _addButton |
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| 110 | * |
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| 111 | * Parameters: |
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| 112 | * id - {String} |
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| 113 | * img - {String} |
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| 114 | * xy - {<OpenLayers.Pixel>} |
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| 115 | * sz - {<OpenLayers.Size>} |
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| 116 | * |
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| 117 | * Returns: |
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| 118 | * {DOMElement} A Div (an alphaImageDiv, to be precise) that contains the |
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| 119 | * image of the button, and has all the proper event handlers set. |
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| 120 | */ |
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| 121 | _addButton:function(id, img, xy, sz) { |
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| 122 | var imgLocation = OpenLayers.Util.getImagesLocation() + img; |
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| 123 | var btn = OpenLayers.Util.createAlphaImageDiv( |
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| 124 | this.id + "_" + id, |
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| 125 | xy, sz, imgLocation, "absolute"); |
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| 126 | |
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| 127 | //we want to add the outer div |
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| 128 | this.div.appendChild(btn); |
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| 129 | |
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| 130 | OpenLayers.Event.observe(btn, "mousedown", |
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| 131 | OpenLayers.Function.bindAsEventListener(this.buttonDown, btn)); |
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| 132 | OpenLayers.Event.observe(btn, "dblclick", |
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| 133 | OpenLayers.Function.bindAsEventListener(this.doubleClick, btn)); |
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| 134 | OpenLayers.Event.observe(btn, "click", |
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| 135 | OpenLayers.Function.bindAsEventListener(this.doubleClick, btn)); |
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| 136 | btn.action = id; |
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| 137 | btn.map = this.map; |
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| 138 | |
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| 139 | if(!this.slideRatio){ |
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| 140 | var slideFactorPixels = this.slideFactor; |
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| 141 | var getSlideFactor = function() { |
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| 142 | return slideFactorPixels; |
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| 143 | }; |
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| 144 | } else { |
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| 145 | var slideRatio = this.slideRatio; |
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| 146 | var getSlideFactor = function(dim) { |
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| 147 | return this.map.getSize()[dim] * slideRatio; |
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| 148 | }; |
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| 149 | } |
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| 150 | |
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| 151 | btn.getSlideFactor = getSlideFactor; |
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| 152 | |
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| 153 | //we want to remember/reference the outer div |
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| 154 | this.buttons.push(btn); |
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| 155 | return btn; |
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| 156 | }, |
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| 157 | |
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| 158 | /** |
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| 159 | * Method: _removeButton |
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| 160 | * |
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| 161 | * Parameters: |
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| 162 | * btn - {Object} |
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| 163 | */ |
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| 164 | _removeButton: function(btn) { |
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| 165 | OpenLayers.Event.stopObservingElement(btn); |
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| 166 | btn.map = null; |
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| 167 | btn.getSlideFactor = null; |
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| 168 | this.div.removeChild(btn); |
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| 169 | OpenLayers.Util.removeItem(this.buttons, btn); |
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| 170 | }, |
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| 171 | |
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| 172 | /** |
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| 173 | * Method: removeButtons |
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| 174 | */ |
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| 175 | removeButtons: function() { |
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| 176 | for(var i=this.buttons.length-1; i>=0; --i) { |
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| 177 | this._removeButton(this.buttons[i]); |
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| 178 | } |
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| 179 | }, |
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| 180 | |
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| 181 | /** |
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| 182 | * Method: doubleClick |
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| 183 | * |
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| 184 | * Parameters: |
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| 185 | * evt - {Event} |
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| 186 | * |
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| 187 | * Returns: |
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| 188 | * {Boolean} |
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| 189 | */ |
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| 190 | doubleClick: function (evt) { |
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| 191 | OpenLayers.Event.stop(evt); |
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| 192 | return false; |
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| 193 | }, |
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| 194 | |
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| 195 | /** |
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| 196 | * Method: buttonDown |
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| 197 | * |
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| 198 | * Parameters: |
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| 199 | * evt - {Event} |
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| 200 | */ |
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| 201 | buttonDown: function (evt) { |
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| 202 | if (!OpenLayers.Event.isLeftClick(evt)) { |
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| 203 | return; |
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| 204 | } |
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| 205 | |
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| 206 | switch (this.action) { |
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| 207 | case "panup": |
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| 208 | this.map.pan(0, -this.getSlideFactor("h")); |
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| 209 | break; |
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| 210 | case "pandown": |
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| 211 | this.map.pan(0, this.getSlideFactor("h")); |
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| 212 | break; |
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| 213 | case "panleft": |
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| 214 | this.map.pan(-this.getSlideFactor("w"), 0); |
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| 215 | break; |
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| 216 | case "panright": |
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| 217 | this.map.pan(this.getSlideFactor("w"), 0); |
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| 218 | break; |
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| 219 | case "zoomin": |
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| 220 | this.map.zoomIn(); |
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| 221 | break; |
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| 222 | case "zoomout": |
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| 223 | this.map.zoomOut(); |
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| 224 | break; |
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| 225 | case "zoomworld": |
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| 226 | this.map.zoomToMaxExtent(); |
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| 227 | break; |
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| 228 | } |
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| 229 | |
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| 230 | OpenLayers.Event.stop(evt); |
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| 231 | }, |
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| 232 | |
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| 233 | CLASS_NAME: "OpenLayers.Control.PanZoom" |
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| 234 | }); |
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| 235 | |
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| 236 | /** |
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| 237 | * Constant: X |
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| 238 | * {Integer} |
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| 239 | */ |
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| 240 | OpenLayers.Control.PanZoom.X = 4; |
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| 241 | |
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| 242 | /** |
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| 243 | * Constant: Y |
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| 244 | * {Integer} |
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| 245 | */ |
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| 246 | OpenLayers.Control.PanZoom.Y = 4; |
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