<html xmlns:v="urn:schemas-microsoft-com:vml" xmlns:o="urn:schemas-microsoft-com:office:office" xmlns:w="urn:schemas-microsoft-com:office:word" xmlns:m="http://schemas.microsoft.com/office/2004/12/omml" xmlns="http://www.w3.org/TR/REC-html40"><head><meta http-equiv=Content-Type content="text/html; charset=us-ascii"><meta name=Generator content="Microsoft Word 14 (filtered medium)"><style><!--
/* Font Definitions */
@font-face
{font-family:SimSun;
panose-1:2 1 6 0 3 1 1 1 1 1;}
@font-face
{font-family:SimSun;
panose-1:2 1 6 0 3 1 1 1 1 1;}
@font-face
{font-family:Calibri;
panose-1:2 15 5 2 2 2 4 3 2 4;}
@font-face
{font-family:SimSun;
panose-1:2 1 6 0 3 1 1 1 1 1;}
/* Style Definitions */
p.MsoNormal, li.MsoNormal, div.MsoNormal
{margin:0cm;
margin-bottom:.0001pt;
text-align:justify;
text-justify:inter-ideograph;
font-size:10.5pt;
font-family:"Calibri","sans-serif";}
a:link, span.MsoHyperlink
{mso-style-priority:99;
color:blue;
text-decoration:underline;}
a:visited, span.MsoHyperlinkFollowed
{mso-style-priority:99;
color:purple;
text-decoration:underline;}
span.EmailStyle17
{mso-style-type:personal-compose;
font-family:"Calibri","sans-serif";
color:windowtext;}
.MsoChpDefault
{mso-style-type:export-only;
font-family:"Calibri","sans-serif";}
/* Page Definitions */
@page WordSection1
{size:612.0pt 792.0pt;
margin:72.0pt 90.0pt 72.0pt 90.0pt;}
div.WordSection1
{page:WordSection1;}
--></style><!--[if gte mso 9]><xml>
<o:shapedefaults v:ext="edit" spidmax="1026" />
</xml><![endif]--><!--[if gte mso 9]><xml>
<o:shapelayout v:ext="edit">
<o:idmap v:ext="edit" data="1" />
</o:shapelayout></xml><![endif]--></head><body lang=ZH-CN link=blue vlink=purple style='text-justify-trim:punctuation'><div class=WordSection1><p class=MsoNormal><span lang=EN-US>Hi,<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US> I want to refresh some tiles by features, below is my code and want to improve the code to refresh image:<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p><p class=MsoNormal style='text-indent:9.0pt'><span lang=EN-US>refreshByFeatures:function() { <br> var features = this.featuresCache; //stores the features info<br> var bounds; <br> if (features) { <br> for (var i = 0; i < features.length; ++i) { <br> if (!bounds) { <br> bounds = features[i].geometry.getBounds(); <br> } else { <br> bounds.extend(features[i].geometry.getBounds()); <br> } <br> } <br> } <br> if (bounds) { <br> var layer = map.getLayersByName(lay_name)[0]; <br> var tiles = layer.grid; <br> <o:p></o:p></span></p><p class=MsoNormal style='text-indent:9.0pt'><span lang=EN-US> for (var i = 0,rows = tiles.length; i < rows; i++) { <br> for (var j = 0,cols = tiles[i].length; j < cols; j++) { <br> var tile = tiles[i][j]; <br> var tilesBounds = tile.bounds; <br> // <br> if (tilesBounds.intersectsBounds(bounds)) { <br> //to refresh the tile, I have to append something to the url to tell browser to retrieve the image. Is there an elegant way?<br> tile.imgDiv.src += '&1=1'; <br> } <br> } <br> } <br> } <br> }<o:p></o:p></span></p><p class=MsoNormal style='text-indent:9.0pt'><span lang=EN-US><o:p> </o:p></span></p><p class=MsoNormal style='text-indent:9.0pt'><span lang=EN-US>Thanks.<o:p></o:p></span></p><p class=MsoNormal style='text-indent:9.0pt'><span lang=EN-US><o:p> </o:p></span></p><p class=MsoNormal style='text-indent:9.0pt'><span lang=EN-US><o:p> </o:p></span></p><p class=MsoNormal style='text-indent:9.0pt'><span lang=EN-US>wangyang<o:p></o:p></span></p></div></body></html>