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<p class="MsoNormal">Hello community! This is my first post; I hope I'm not asking too trivial a question. :) I'll get right into it:<br></p>
<p class="MsoNormal"> </p>
<p class="MsoNormal">Based on this example -- <a href="http://www.openlayers.org/dev/examples/drag-feature.html">http://www.openlayers.org/dev/examples/drag-feature.html</a>
-- I have put a similar control on my website where I can draw a polygon on my
map. So what I want to do is get the coordinates of my polygon’s
vertices after I finish drawing it.</p>
<p class="MsoNormal"> </p>
<p class="MsoNormal">According to</p>
<p class="MsoNormal"><a href="http://dev.openlayers.org/releases/OpenLayers-2.8/doc/apidocs/files/OpenLayers/Handler/Polygon-js.html">http://dev.openlayers.org/releases/OpenLayers-2.8/doc/apidocs/files/OpenLayers/Handler/Polygon-js.html</a></p>
<p class="MsoNormal">there are callback functions called ‘point’ and ‘done’ that
should be able to give me what I want.</p>
<p class="MsoNormal"> </p>
<p class="MsoNormal">My question is how do I get control of those functions? <span style=""> </span>I think I am a little lacking in syntax
knowledge as to how to set it up.</p><p class="MsoNormal"><br></p>
<p class="MsoNormal">For example I have:</p>
<p class="MsoNormal"><span style="font-family: "Courier New";">var drawpoly = new OpenLayers.Control.DrawFeature(vectorLayer,
OpenLayers.Handler.Polygon);</span></p>
<p class="MsoNormal"><span style="font-family: "Courier New";">map.addControl(drawpoly);</span></p>
<p class="MsoNormal">which takes care of enabling the drawing feature.<span style=""> </span>But I don’t know how to get to the done()
callback function from here.</p>
<p class="MsoNormal"> </p>
<p class="MsoNormal">On a separate note, I found this example online:</p>
<p class="MsoNormal"><span style="font-family: "Courier New";">var drawpoly = new OpenLayers.Control.DrawFeature(vectorLayer,
OpenLayers.Handler.Polygon, {'featureAdded': polygonAdded});</span></p>
<p class="MsoNormal"><span style="font-family: "Courier New";">...</span></p>
<p class="MsoNormal"><span style="font-family: "Courier New";">polygonAdded =
function (feature) {</span></p>
<p class="MsoNormal" style="text-indent: 4.5pt;"><span style="font-family: "Courier New";"><span style=""> </span>//Yay, I can do stuff here!</span></p>
<p class="MsoNormal"><span style="font-family: "Courier New";">}</span></p>
<p class="MsoNormal">which is pretty close to what I want, but I think the object
passed to it is not the polygon object I want to manipulate.<span style="">
</span>(Or is it?)</p>
<p class="MsoNormal"><br></p><p class="MsoNormal">If anyone has a better way to get the coordinates of a polygon (I assume I'd get an x-y pixel value first and would have to convert to lat/lng), I'd love to hear that, too. But knowing how to get to the callbacks would also be useful in future applications. :)<br>
</p>
<p class="MsoNormal"> </p>
<p class="MsoNormal">Thanks for reading and considering!</p><p class="MsoNormal"><br></p><p class="MsoNormal">--Harry</p><p class="MsoNormal"><a href="mailto:mr.harry.lam@gmail.com">mr.harry.lam@gmail.com</a><br><span style=""></span></p>