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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