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<html><head><meta http-equiv="Content-Type" content="text/html; charset=UTF-8"><title>OpenLayers.Layer.Grid - OpenLayers</title><link rel="stylesheet" type="text/css" href="../../../styles/main.css"><script language=JavaScript src="../../../javascript/main.js"></script><script language=JavaScript src="../../../javascript/prettify.js"></script><script language=JavaScript src="../../../javascript/searchdata.js"></script></head><body class="ContentPage" onLoad="NDOnLoad();prettyPrint();"><script language=JavaScript><!--
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<div id=Content><div class="CClass"><div class=CTopic id=MainTopic><h1 class=CTitle><a name="OpenLayers.Layer.Grid"></a>OpenLayers.<wbr>Layer.Grid</h1><div class=CBody><p>Base class for layers that use a lattice of tiles. Create a new grid layer with the <a href="#OpenLayers.Layer.Grid.OpenLayers.Layer.Grid" class=LConstructor id=link10 onMouseOver="ShowTip(event, 'tt10', 'link10')" onMouseOut="HideTip('tt10')">OpenLayers.Layer.Grid</a> constructor.</p><h4 class=CHeading>Inherits from</h4><ul><li><a href="HTTPRequest-js.html#OpenLayers.Layer.HTTPRequest" class=LClass >OpenLayers.Layer.HTTPRequest</a></li></ul><!--START_ND_SUMMARY--><div class=Summary><div class=STitle>Summary</div><div class=SBorder><table border=0 cellspacing=0 cellpadding=0 class=STable><tr class="SMain"><td class=SEntry><a href="#OpenLayers.Layer.Grid" >OpenLayers.<wbr>Layer.Grid</a></td><td class=SDescription>Base class for layers that use a lattice of tiles. </td></tr><tr class="SGroup SIndent1"><td class=SEntry><a href="#OpenLayers.Layer.Grid.Properties" >Properties</a></td><td class=SDescription></td></tr><tr class="SProperty SIndent2 SMarked"><td class=SEntry><a href="#OpenLayers.Layer.Grid.tileSize" >tileSize</a></td><td class=SDescription>{<a href="../BaseTypes/Size-js.html#OpenLayers.Size" class=LClass id=link1 onMouseOver="ShowTip(event, 'tt1', 'link1')" onMouseOut="HideTip('tt1')">OpenLayers.Size</a>}</td></tr><tr class="SProperty SIndent2"><td class=SEntry><a href="#OpenLayers.Layer.Grid.tileOrigin" >tileOrigin</a></td><td class=SDescription>{<a href="../BaseTypes/LonLat-js.html#OpenLayers.LonLat" class=LClass id=link2 onMouseOver="ShowTip(event, 'tt2', 'link2')" onMouseOut="HideTip('tt2')">OpenLayers.LonLat</a>} Optional origin for aligning the grid of tiles. </td></tr><tr class="SProperty SIndent2 SMarked"><td class=SEntry><a href="#OpenLayers.Layer.Grid.tileOptions" >tileOptions</a></td><td class=SDescription>{Object} optional configuration options for <a href="../../deprecated-js.html#OpenLayers.Tile" class=LClass >OpenLayers.Tile</a> instances created by this Layer, if supported by the tile class.</td></tr><tr class="SProperty SIndent2"><td class=SEntry><a href="#OpenLayers.Layer.Grid.tileClass" >tileClass</a></td><td class=SDescription>{<a href="../../deprecated-js.html#OpenLayers.Tile" class=LClass >OpenLayers.Tile</a>} The tile class to use for this layer. </td></tr><tr class="SProperty SIndent2 SMarked"><td class=SEntry><a href="#OpenLayers.Layer.Grid.singleTile" >singleTile</a></td><td class=SDescription>{Boolean} Moves the layer into single-tile mode, meaning that one tile will be loaded. </td></tr><tr class="SProperty SIndent2"><td class=SEntry><a href="#OpenLayers.Layer.Grid.ratio" >ratio</a></td><td class=SDescription>{Float} Used only when in single-tile mode, this specifies the ratio of the size of the single tile to the size of the map. </td></tr><tr class="SProperty SIndent2 SMarked"><td class=SEntry><a href="#OpenLayers.Layer.Grid.buffer" >buffer</a></td><td class=SDescription>{Integer} Used only when in gridded mode, this specifies the number of extra rows and colums of tiles on each side which will surround the minimum grid tiles to cover the map. </td></tr><tr class="SProperty SIndent2"><td class=SEntry><a href="#OpenLayers.Layer.Grid.transitionEffect" >transitionEffect</a></td><td class=SDescription>{String} The transition effect to use when the map is zoomed. </td></tr><tr class="SProperty SIndent2 SMarked"><td class=SEntry><a href="#OpenLayers.Layer.Grid.numLoadingTiles" >numLoadingTiles</a></td><td class=SDescription>{Integer} How many tiles are still loading?</td></tr><tr class="SProperty SIndent2"><td class=SEntry><a href="#OpenLayers.Layer.Grid.removeBackBufferDelay" >removeBackBufferDelay</a></td><td class=SDescription>{Number} Delay for removing the backbuffer when all tiles have finished loading. </td></tr><tr class="SProperty SIndent2 SMarked"><td class=SEntry><a href="#OpenLayers.Layer.Grid.className" >className</a></td><td class=SDescription>{String} Name of the class added to the layer div. </td></tr><tr class="SGroup SIndent1"><td class=SEntry><a href="#OpenLayers.Layer.Grid.Constructor" >Constructor</a></td><td class=SDescription></td></tr><tr class="SConstructor SIndent2 SMarked"><td class=SEntry><a href="#OpenLayers.Layer.Grid.OpenLayers.Layer.Grid" >OpenLayers.<wbr>Layer.Grid</a></td><td class=SDescription>Create a new grid layer</td></tr><tr class="SGroup SIndent1"><td class=SEntry><a href="#OpenLayers.Layer.Grid.Functions" >Functions</a></td><td class=SDescription></td></tr><tr class="SFunction SIndent2 SMarked"><td class=SEntry><a href="#OpenLayers.Layer.Grid.destroy" id=link3 onMouseOver="ShowTip(event, 'tt3', 'link3')" onMouseOut="HideTip('tt3')">destroy</a></td><td class=SDescription>Deconstruct the layer and clear the grid.</td></tr><tr class="SFunction SIndent2"><td class=SEntry><a href="#OpenLayers.Layer.Grid.mergeNewParams" >mergeNewParams</a></td><td class=SDescription>Refetches tiles with new params merged, keeping a backbuffer. </td></tr><tr class="SFunction SIndent2 SMarked"><td class=SEntry><a href="#OpenLayers.Layer.Grid.addOptions" id=link4 onMouseOver="ShowTip(event, 'tt4', 'link4')" onMouseOut="HideTip('tt4')">addOptions</a></td><td class=SDescription></td></tr><tr class="SFunction SIndent2"><td class=SEntry><a href="#OpenLayers.Layer.Grid.clone" id=link5 onMouseOver="ShowTip(event, 'tt5', 'link5')" onMouseOut="HideTip('tt5')">clone</a></td><td class=SDescription>Create a clone of this layer</td></tr><tr class="SFunction SIndent2 SMarked"><td class=SEntry><a href="#OpenLayers.Layer.Grid.setTileSize" id=link6 onMouseOver="ShowTip(event, 'tt6', 'link6')" onMouseOut="HideTip('tt6')">setTileSize</a></td><td class=SDescription>Check if we are in singleTile mode and if so, set the size as a ratio of the map size (as specified by the layer’s ‘ratio’ property).</td></tr><tr class="SFunction SIndent2"><td class=SEntry><a href="#OpenLayers.Layer.Grid.getTilesBounds" id=link7 onMouseOver="ShowTip(event, 'tt7', 'link7')" onMouseOut="HideTip('tt7')">getTilesBounds</a></td><td class=SDescription>Return the bounds of the tile grid.</td></tr><tr class="SFunction SIndent2 SMarked"><td class=SEntry><a href="#OpenLayers.Layer.Grid.addTile" id=link8 onMouseOver="ShowTip(event, 'tt8', 'link8')" onMouseOut="HideTip('tt8')">addTile</a></td><td class=SDescription>Create a tile, initialize it, and add it to the layer div.</td></tr><tr class="SFunction SIndent2"><td class=SEntry><a href="#OpenLayers.Layer.Grid.getTileBounds" id=link9 onMouseOver="ShowTip(event, 'tt9', 'link9')" onMouseOut="HideTip('tt9')">getTileBounds</a></td><td class=SDescription>Returns The tile bounds for a layer given a pixel location.</td></tr></table></div></div><!--END_ND_SUMMARY--></div></div></div>
<div class="CGroup"><div class=CTopic><h3 class=CTitle><a name="OpenLayers.Layer.Grid.Properties"></a>Properties</h3></div></div>
<div class="CProperty"><div class=CTopic><h3 class=CTitle><a name="OpenLayers.Layer.Grid.tileSize"></a>tileSize</h3><div class=CBody><p>{<a href="../BaseTypes/Size-js.html#OpenLayers.Size" class=LClass id=link11 onMouseOver="ShowTip(event, 'tt1', 'link11')" onMouseOut="HideTip('tt1')">OpenLayers.Size</a>}</p></div></div></div>
<div class="CProperty"><div class=CTopic><h3 class=CTitle><a name="OpenLayers.Layer.Grid.tileOrigin"></a>tileOrigin</h3><div class=CBody><p>{<a href="../BaseTypes/LonLat-js.html#OpenLayers.LonLat" class=LClass id=link12 onMouseOver="ShowTip(event, 'tt2', 'link12')" onMouseOut="HideTip('tt2')">OpenLayers.LonLat</a>} Optional origin for aligning the grid of tiles. If provided, requests for tiles at all resolutions will be aligned with this location (no tiles shall overlap this location). If not provided, the grid of tiles will be aligned with the layer’s <a href="../Layer-js.html#OpenLayers.Layer.maxExtent" class=LProperty id=link13 onMouseOver="ShowTip(event, 'tt11', 'link13')" onMouseOut="HideTip('tt11')">maxExtent</a>. Default is ``null``.</p></div></div></div>
<div class="CProperty"><div class=CTopic><h3 class=CTitle><a name="OpenLayers.Layer.Grid.tileOptions"></a>tileOptions</h3><div class=CBody><p>{Object} optional configuration options for <a href="../../deprecated-js.html#OpenLayers.Tile" class=LClass >OpenLayers.Tile</a> instances created by this Layer, if supported by the tile class.</p></div></div></div>
<div class="CProperty"><div class=CTopic><h3 class=CTitle><a name="OpenLayers.Layer.Grid.tileClass"></a>tileClass</h3><div class=CBody><p>{<a href="../../deprecated-js.html#OpenLayers.Tile" class=LClass >OpenLayers.Tile</a>} The tile class to use for this layer. Defaults is OpenLayers.Tile.Image.</p></div></div></div>
<div class="CProperty"><div class=CTopic><h3 class=CTitle><a name="OpenLayers.Layer.Grid.singleTile"></a>singleTile</h3><div class=CBody><p>{Boolean} Moves the layer into single-tile mode, meaning that one tile will be loaded. The tile’s size will be determined by the ‘ratio’ property. When the tile is dragged such that it does not cover the entire viewport, it is reloaded.</p></div></div></div>
<div class="CProperty"><div class=CTopic><h3 class=CTitle><a name="OpenLayers.Layer.Grid.ratio"></a>ratio</h3><div class=CBody><p>{Float} Used only when in single-tile mode, this specifies the ratio of the size of the single tile to the size of the map. Default value is 1.5.</p></div></div></div>
<div class="CProperty"><div class=CTopic><h3 class=CTitle><a name="OpenLayers.Layer.Grid.buffer"></a>buffer</h3><div class=CBody><p>{Integer} Used only when in gridded mode, this specifies the number of extra rows and colums of tiles on each side which will surround the minimum grid tiles to cover the map. For very slow loading layers, a larger value may increase performance somewhat when dragging, but will increase bandwidth use significantly.</p></div></div></div>
<div class="CProperty"><div class=CTopic><h3 class=CTitle><a name="OpenLayers.Layer.Grid.transitionEffect"></a>transitionEffect</h3><div class=CBody><p>{String} The transition effect to use when the map is zoomed. Two posible values:</p><table border=0 cellspacing=0 cellpadding=0 class=CDescriptionList><tr><td class=CDLEntry>”resize”</td><td class=CDLDescription>Existing tiles are resized on zoom to provide a visual effect of the zoom having taken place immediately. As the new tiles become available, they are drawn on top of the resized tiles (this is the default setting).</td></tr><tr><td class=CDLEntry>”map-resize”</td><td class=CDLDescription>Existing tiles are resized on zoom and placed below the base layer. New tiles for the base layer will cover existing tiles. This setting is recommended when having an overlay duplicated during the transition is undesirable (e.g. street labels or big transparent fills).</td></tr><tr><td class=CDLEntry>null</td><td class=CDLDescription>No transition effect.</td></tr></table><p>Using “resize” on non-opaque layers can cause undesired visual effects. Set transitionEffect to null in this case.</p></div></div></div>
<div class="CProperty"><div class=CTopic><h3 class=CTitle><a name="OpenLayers.Layer.Grid.numLoadingTiles"></a>numLoadingTiles</h3><div class=CBody><p>{Integer} How many tiles are still loading?</p></div></div></div>
<div class="CProperty"><div class=CTopic><h3 class=CTitle><a name="OpenLayers.Layer.Grid.removeBackBufferDelay"></a>removeBackBufferDelay</h3><div class=CBody><p>{Number} Delay for removing the backbuffer when all tiles have finished loading. Can be set to 0 when no css opacity transitions for the olTileImage class are used. Default is 0 for <a href="#OpenLayers.Layer.Grid.singleTile" class=LProperty id=link14 onMouseOver="ShowTip(event, 'tt12', 'link14')" onMouseOut="HideTip('tt12')">singleTile</a> layers, 2500 for tiled layers. See <a href="#OpenLayers.Layer.Grid.className" class=LProperty id=link15 onMouseOver="ShowTip(event, 'tt13', 'link15')" onMouseOut="HideTip('tt13')">className</a> for more information on tile animation.</p></div></div></div>
<div class="CProperty"><div class=CTopic><h3 class=CTitle><a name="OpenLayers.Layer.Grid.className"></a>className</h3><div class=CBody><p>{String} Name of the class added to the layer div. If not set in the options passed to the constructor then className defaults to “olLayerGridSingleTile” for single tile layers (see <a href="#OpenLayers.Layer.Grid.singleTile" class=LProperty id=link16 onMouseOver="ShowTip(event, 'tt12', 'link16')" onMouseOut="HideTip('tt12')">singleTile</a>), and “olLayerGrid” for non single tile layers.</p><h4 class=CHeading>Note</h4><p>The displaying of tiles is not animated by default for single tile layers - OpenLayers’ default theme (style.css) includes this:</p><blockquote><pre class="prettyprint">.olLayerGrid .olTileImage {
-webkit-transition: opacity 0.2s linear;
-moz-transition: opacity 0.2s linear;
-o-transition: opacity 0.2s linear;
transition: opacity 0.2s linear;
}</pre></blockquote><p>To animate tile displaying for any grid layer the following CSS rule can be used:</p><blockquote><pre class="prettyprint">.olTileImage {
-webkit-transition: opacity 0.2s linear;
-moz-transition: opacity 0.2s linear;
-o-transition: opacity 0.2s linear;
transition: opacity 0.2s linear;
}</pre></blockquote><p>In that case, to avoid flash effects, <a href="#OpenLayers.Layer.Grid.removeBackBufferDelay" class=LProperty id=link17 onMouseOver="ShowTip(event, 'tt14', 'link17')" onMouseOut="HideTip('tt14')">removeBackBufferDelay</a> should not be zero.</p></div></div></div>
<div class="CGroup"><div class=CTopic><h3 class=CTitle><a name="OpenLayers.Layer.Grid.Constructor"></a>Constructor</h3></div></div>
<div class="CConstructor"><div class=CTopic><h3 class=CTitle><a name="OpenLayers.Layer.Grid.OpenLayers.Layer.Grid"></a>OpenLayers.<wbr>Layer.Grid</h3><div class=CBody><p>Create a new grid layer</p><h4 class=CHeading>Parameters</h4><table border=0 cellspacing=0 cellpadding=0 class=CDescriptionList><tr><td class=CDLEntry>name</td><td class=CDLDescription>{String}</td></tr><tr><td class=CDLEntry>url</td><td class=CDLDescription>{String}</td></tr><tr><td class=CDLEntry>params</td><td class=CDLDescription>{Object}</td></tr><tr><td class=CDLEntry>options</td><td class=CDLDescription>{Object} Hashtable of extra options to tag onto the layer</td></tr></table></div></div></div>
<div class="CGroup"><div class=CTopic><h3 class=CTitle><a name="OpenLayers.Layer.Grid.Functions"></a>Functions</h3></div></div>
<div class="CFunction"><div class=CTopic><h3 class=CTitle><a name="OpenLayers.Layer.Grid.destroy"></a>destroy</h3><div class=CBody><blockquote><table border=0 cellspacing=0 cellpadding=0 class="Prototype"><tr><td class="prettyprint">destroy: function()</td></tr></table></blockquote><p>Deconstruct the layer and clear the grid.</p></div></div></div>
<div class="CFunction"><div class=CTopic><h3 class=CTitle><a name="OpenLayers.Layer.Grid.mergeNewParams"></a>mergeNewParams</h3><div class=CBody><p>Refetches tiles with new params merged, keeping a backbuffer. Each loading new tile will have a css class of ‘.olTileReplacing’. If a stylesheet applies a ‘display: none’ style to that class, any fade-in transition will not apply, and backbuffers for each tile will be removed as soon as the tile is loaded.</p><h4 class=CHeading>Parameters</h4><table border=0 cellspacing=0 cellpadding=0 class=CDescriptionList><tr><td class=CDLEntry>newParams</td><td class=CDLDescription>{Object}</td></tr></table><h4 class=CHeading>Returns</h4><p>redrawn: {Boolean} whether the layer was actually redrawn.</p></div></div></div>
<div class="CFunction"><div class=CTopic><h3 class=CTitle><a name="OpenLayers.Layer.Grid.addOptions"></a>addOptions</h3><div class=CBody><blockquote><table border=0 cellspacing=0 cellpadding=0 class="Prototype"><tr><td><table border=0 cellspacing=0 cellpadding=0><tr><td class="PBeforeParameters prettyprint "nowrap>addOptions: function (</td><td class="PParameter prettyprint " nowrap>newOptions,</td></tr><tr><td></td><td class="PParameter prettyprint " nowrap>reinitialize</td><td class="PAfterParameters prettyprint "nowrap>)</td></tr></table></td></tr></table></blockquote><h4 class=CHeading>Parameters</h4><table border=0 cellspacing=0 cellpadding=0 class=CDescriptionList><tr><td class=CDLEntry>newOptions</td><td class=CDLDescription>{Object}</td></tr><tr><td class=CDLEntry>reinitialize</td><td class=CDLDescription>{Boolean} If set to true, and if resolution options of the current baseLayer were changed, the map will be recentered to make sure that it is displayed with a valid resolution, and a changebaselayer event will be triggered.</td></tr></table></div></div></div>
<div class="CFunction"><div class=CTopic><h3 class=CTitle><a name="OpenLayers.Layer.Grid.clone"></a>clone</h3><div class=CBody><blockquote><table border=0 cellspacing=0 cellpadding=0 class="Prototype"><tr><td><table border=0 cellspacing=0 cellpadding=0><tr><td class="PBeforeParameters prettyprint "nowrap>clone: function (</td><td class="PParameter prettyprint " nowrap>obj</td><td class="PAfterParameters prettyprint "nowrap>)</td></tr></table></td></tr></table></blockquote><p>Create a clone of this layer</p><h4 class=CHeading>Parameters</h4><table border=0 cellspacing=0 cellpadding=0 class=CDescriptionList><tr><td class=CDLEntry>obj</td><td class=CDLDescription>{Object} Is this ever used?</td></tr></table><h4 class=CHeading>Returns</h4><p>{<a href="#OpenLayers.Layer.Grid.OpenLayers.Layer.Grid" class=LConstructor id=link18 onMouseOver="ShowTip(event, 'tt10', 'link18')" onMouseOut="HideTip('tt10')">OpenLayers.Layer.Grid</a>} An exact clone of this OpenLayers.Layer.Grid</p></div></div></div>
<div class="CFunction"><div class=CTopic><h3 class=CTitle><a name="OpenLayers.Layer.Grid.setTileSize"></a>setTileSize</h3><div class=CBody><blockquote><table border=0 cellspacing=0 cellpadding=0 class="Prototype"><tr><td><table border=0 cellspacing=0 cellpadding=0><tr><td class="PBeforeParameters prettyprint "nowrap>setTileSize: function(</td><td class="PParameter prettyprint " nowrap>size</td><td class="PAfterParameters prettyprint "nowrap>)</td></tr></table></td></tr></table></blockquote><p>Check if we are in singleTile mode and if so, set the size as a ratio of the map size (as specified by the layer’s ‘ratio’ property).</p><h4 class=CHeading>Parameters</h4><table border=0 cellspacing=0 cellpadding=0 class=CDescriptionList><tr><td class=CDLEntry>size</td><td class=CDLDescription>{<a href="../BaseTypes/Size-js.html#OpenLayers.Size" class=LClass id=link19 onMouseOver="ShowTip(event, 'tt1', 'link19')" onMouseOut="HideTip('tt1')">OpenLayers.Size</a>}</td></tr></table></div></div></div>
<div class="CFunction"><div class=CTopic><h3 class=CTitle><a name="OpenLayers.Layer.Grid.getTilesBounds"></a>getTilesBounds</h3><div class=CBody><blockquote><table border=0 cellspacing=0 cellpadding=0 class="Prototype"><tr><td class="prettyprint">getTilesBounds: function()</td></tr></table></blockquote><p>Return the bounds of the tile grid.</p><h4 class=CHeading>Returns</h4><p>{<a href="../BaseTypes/Bounds-js.html#OpenLayers.Bounds" class=LClass id=link20 onMouseOver="ShowTip(event, 'tt15', 'link20')" onMouseOut="HideTip('tt15')">OpenLayers.Bounds</a>} A Bounds object representing the bounds of all the currently loaded tiles (including those partially or not at all seen onscreen).</p></div></div></div>
<div class="CFunction"><div class=CTopic><h3 class=CTitle><a name="OpenLayers.Layer.Grid.addTile"></a>addTile</h3><div class=CBody><blockquote><table border=0 cellspacing=0 cellpadding=0 class="Prototype"><tr><td><table border=0 cellspacing=0 cellpadding=0><tr><td class="PBeforeParameters prettyprint "nowrap>addTile: function(</td><td class="PParameter prettyprint " nowrap>bounds,</td></tr><tr><td></td><td class="PParameter prettyprint " nowrap>position</td><td class="PAfterParameters prettyprint "nowrap>)</td></tr></table></td></tr></table></blockquote><p>Create a tile, initialize it, and add it to the layer div.</p><p>Parameters bounds - {<a href="../BaseTypes/Bounds-js.html#OpenLayers.Bounds" class=LClass id=link21 onMouseOver="ShowTip(event, 'tt15', 'link21')" onMouseOut="HideTip('tt15')">OpenLayers.Bounds</a>} position - {<a href="../BaseTypes/Pixel-js.html#OpenLayers.Pixel" class=LClass id=link22 onMouseOver="ShowTip(event, 'tt16', 'link22')" onMouseOut="HideTip('tt16')">OpenLayers.Pixel</a>}</p><h4 class=CHeading>Returns</h4><p>{<a href="../../deprecated-js.html#OpenLayers.Tile" class=LClass >OpenLayers.Tile</a>} The added OpenLayers.Tile</p></div></div></div>
<div class="CFunction"><div class=CTopic><h3 class=CTitle><a name="OpenLayers.Layer.Grid.getTileBounds"></a>getTileBounds</h3><div class=CBody><blockquote><table border=0 cellspacing=0 cellpadding=0 class="Prototype"><tr><td><table border=0 cellspacing=0 cellpadding=0><tr><td class="PBeforeParameters prettyprint "nowrap>getTileBounds: function(</td><td class="PParameter prettyprint " nowrap>viewPortPx</td><td class="PAfterParameters prettyprint "nowrap>)</td></tr></table></td></tr></table></blockquote><p>Returns The tile bounds for a layer given a pixel location.</p><h4 class=CHeading>Parameters</h4><table border=0 cellspacing=0 cellpadding=0 class=CDescriptionList><tr><td class=CDLEntry>viewPortPx</td><td class=CDLDescription>{<a href="../BaseTypes/Pixel-js.html#OpenLayers.Pixel" class=LClass id=link23 onMouseOver="ShowTip(event, 'tt16', 'link23')" onMouseOut="HideTip('tt16')">OpenLayers.Pixel</a>} The location in the viewport.</td></tr></table><h4 class=CHeading>Returns</h4><p>{<a href="../BaseTypes/Bounds-js.html#OpenLayers.Bounds" class=LClass id=link24 onMouseOver="ShowTip(event, 'tt15', 'link24')" onMouseOut="HideTip('tt15')">OpenLayers.Bounds</a>} Bounds of the tile at the given pixel location.</p></div></div></div>
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<div class=CToolTip id="tt1"><div class=CClass>Instances of this class represent a width/height pair</div></div><div class=CToolTip id="tt2"><div class=CClass>This class represents a longitude and latitude pair</div></div><div class=CToolTip id="tt3"><div class=CFunction><blockquote><table border=0 cellspacing=0 cellpadding=0 class="Prototype"><tr><td class="prettyprint">destroy: function()</td></tr></table></blockquote>Deconstruct the layer and clear the grid.</div></div><div class=CToolTip id="tt4"><div class=CFunction><blockquote><table border=0 cellspacing=0 cellpadding=0 class="Prototype"><tr><td><table border=0 cellspacing=0 cellpadding=0><tr><td class="PBeforeParameters prettyprint "nowrap>addOptions: function (</td><td class="PParameter prettyprint " nowrap>newOptions,</td></tr><tr><td></td><td class="PParameter prettyprint " nowrap>reinitialize</td><td class="PAfterParameters prettyprint "nowrap>)</td></tr></table></td></tr></table></blockquote></div></div><div class=CToolTip id="tt5"><div class=CFunction><blockquote><table border=0 cellspacing=0 cellpadding=0 class="Prototype"><tr><td><table border=0 cellspacing=0 cellpadding=0><tr><td class="PBeforeParameters prettyprint "nowrap>clone: function (</td><td class="PParameter prettyprint " nowrap>obj</td><td class="PAfterParameters prettyprint "nowrap>)</td></tr></table></td></tr></table></blockquote>Create a clone of this layer</div></div><div class=CToolTip id="tt6"><div class=CFunction><blockquote><table border=0 cellspacing=0 cellpadding=0 class="Prototype"><tr><td><table border=0 cellspacing=0 cellpadding=0><tr><td class="PBeforeParameters prettyprint "nowrap>setTileSize: function(</td><td class="PParameter prettyprint " nowrap>size</td><td class="PAfterParameters prettyprint "nowrap>)</td></tr></table></td></tr></table></blockquote>Check if we are in singleTile mode and if so, set the size as a ratio of the map size (as specified by the layer’s ‘ratio’ property).</div></div><div class=CToolTip id="tt7"><div class=CFunction><blockquote><table border=0 cellspacing=0 cellpadding=0 class="Prototype"><tr><td class="prettyprint">getTilesBounds: function()</td></tr></table></blockquote>Return the bounds of the tile grid.</div></div><div class=CToolTip id="tt8"><div class=CFunction><blockquote><table border=0 cellspacing=0 cellpadding=0 class="Prototype"><tr><td><table border=0 cellspacing=0 cellpadding=0><tr><td class="PBeforeParameters prettyprint "nowrap>addTile: function(</td><td class="PParameter prettyprint " nowrap>bounds,</td></tr><tr><td></td><td class="PParameter prettyprint " nowrap>position</td><td class="PAfterParameters prettyprint "nowrap>)</td></tr></table></td></tr></table></blockquote>Create a tile, initialize it, and add it to the layer div.</div></div><div class=CToolTip id="tt9"><div class=CFunction><blockquote><table border=0 cellspacing=0 cellpadding=0 class="Prototype"><tr><td><table border=0 cellspacing=0 cellpadding=0><tr><td class="PBeforeParameters prettyprint "nowrap>getTileBounds: function(</td><td class="PParameter prettyprint " nowrap>viewPortPx</td><td class="PAfterParameters prettyprint "nowrap>)</td></tr></table></td></tr></table></blockquote>Returns The tile bounds for a layer given a pixel location.</div></div><div class=CToolTip id="tt10"><div class=CConstructor>Create a new grid layer</div></div><div class=CToolTip id="tt11"><div class=CProperty>{<OpenLayers.Bounds>|Array} If provided as an array, the array should consist of four values (left, bottom, right, top). </div></div><div class=CToolTip id="tt12"><div class=CProperty>{Boolean} Moves the layer into single-tile mode, meaning that one tile will be loaded. </div></div><div class=CToolTip id="tt13"><div class=CProperty>{String} Name of the class added to the layer div. </div></div><div class=CToolTip id="tt14"><div class=CProperty>{Number} Delay for removing the backbuffer when all tiles have finished loading. </div></div><div class=CToolTip id="tt15"><div class=CClass>Instances of this class represent bounding boxes. </div></div><div class=CToolTip id="tt16"><div class=CClass>This class represents a screen coordinate, in x and y coordinates</div></div><!--END_ND_TOOLTIPS-->
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