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<p class=MsoPlainText><font size=2 face="Courier New"><span style='font-size:
10.0pt'>Good Day Everyone<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 face="Courier New"><span style='font-size:
10.0pt'><o:p> </o:p></span></font></p>
<p class=MsoPlainText><font size=2 face="Courier New"><span style='font-size:
10.0pt'>I want to make use of the GetFeatureInfo functionality, but I want to
do so by clicking a button on the map panel. Below is the coding that I am
using. I click on the button and when I click on a feature point I get the
following error displayed below in firebug. FYI, I am using OpenLayers 2.7. Can
someone please help me with this?<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 face="Courier New"><span style='font-size:
10.0pt'><o:p> </o:p></span></font></p>
<p class=MsoPlainText><b><font size=2 face="Courier New"><span
style='font-size:10.0pt;font-weight:bold'>ERROR:<o:p></o:p></span></font></b></p>
<p class=MsoPlainText><font size=2 face="Courier New"><span style='font-size:
10.0pt'>this.callbacks is undefined<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 face="Courier New"><span style='font-size:
10.0pt'>OpenLayers.js (line 662)<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 face="Courier New"><span style='font-size:
10.0pt'><o:p> </o:p></span></font></p>
<p class=MsoPlainText><b><font size=2 face="Courier New"><span
style='font-size:10.0pt;font-weight:bold'>SOURCE CODE:<o:p></o:p></span></font></b></p>
<p class=MsoPlainText><font size=2 face="Courier New"><span style='font-size:
10.0pt'> var featureInfo;<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 face="Courier New"><span style='font-size:
10.0pt'><o:p> </o:p></span></font></p>
<p class=MsoPlainText><font size=2 face="Courier New"><span style='font-size:
10.0pt'> // build the featureInfo (aka query tool/button)<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 face="Courier New"><span style='font-size:
10.0pt'> featureInfo = new OpenLayers.Control(<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 face="Courier New"><span style='font-size:
10.0pt'>
{title: "Query map features", <o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 face="Courier New"><span style='font-size:
10.0pt'>
displayClass: "olControlFeatureInfo"});<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 face="Courier New"><span style='font-size:
10.0pt'>
<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 face="Courier New"><span style='font-size:
10.0pt'> // register events to the featureInfo tool<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 face="Courier New"><span style='font-size:
10.0pt'> featureInfo.events.register("activate", featureInfo,
function() { toggleQueryMode();
});
<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 face="Courier New"><span style='font-size:
10.0pt'> featureInfo.events.register("deactivate", featureInfo,
function() { toggleQueryMode(); });<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 face="Courier New"><span style='font-size:
10.0pt'><o:p> </o:p></span></font></p>
<p class=MsoPlainText><font size=2 face="Courier New"><span style='font-size:
10.0pt'>panel.addControls([featureInfo]);<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 face="Courier New"><span style='font-size:
10.0pt'><o:p> </o:p></span></font></p>
<p class=MsoPlainText><font size=2 face="Courier New"><span style='font-size:
10.0pt'> // support GetFeatureInfo<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 face="Courier New"><span style='font-size:
10.0pt'> queryEventHandler = new OpenLayers.Handler.Click({'map': map,
'click': function(e) { doGetFeatureInfo(e); } });<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 face="Courier New"><span style='font-size:
10.0pt'><o:p> </o:p></span></font></p>
<p class=MsoPlainText><font size=2 face="Courier New"><span style='font-size:
10.0pt'><o:p> </o:p></span></font></p>
<p class=MsoPlainText><font size=2 face="Courier New"><span style='font-size:
10.0pt'> function toggleQueryMode()
{ <o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 face="Courier New"><span style='font-size:
10.0pt'> if(featureInfo.active) {<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 face="Courier New"><span style='font-size:
10.0pt'> queryEventHandler.activate();<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 face="Courier New"><span style='font-size:
10.0pt'> } else {<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 face="Courier New"><span style='font-size:
10.0pt'>
queryEventHandler.deactivate();<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 face="Courier New"><span style='font-size:
10.0pt'> }<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 face="Courier New"><span style='font-size:
10.0pt'> }<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 face="Courier New"><span style='font-size:
10.0pt'> <o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 face="Courier New"><span style='font-size:
10.0pt'> function doGetFeatureInfo(e) {<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 face="Courier New"><span style='font-size:
10.0pt'> document.getElementById('nodelist').innerHTML =
"Loading... please wait...";<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 face="Courier New"><span style='font-size:
10.0pt'> var url = map.layers[0].getFullRequestString(<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 face="Courier New"><span style='font-size:
10.0pt'>
{REQUEST: "GetFeatureInfo",<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 face="Courier New"><span style='font-size:
10.0pt'>
EXCEPTIONS: "application/vnd.ogc.se_xml",<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 face="Courier New"><span style='font-size:
10.0pt'>
BBOX: map.getExtent().toBBOX(),<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 face="Courier New"><span style='font-size:
10.0pt'>
X: e.xy.x,<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 face="Courier New"><span style='font-size:
10.0pt'>
Y: e.xy.y,<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 face="Courier New"><span style='font-size:
10.0pt'>
INFO_FORMAT: 'text/html',<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 face="Courier New"><span style='font-size:
10.0pt'>
QUERY_LAYERS: map.layers[0].params.LAYERS,<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 face="Courier New"><span style='font-size:
10.0pt'>
FEATURE_COUNT: 50,<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 face="Courier New"><span style='font-size:
10.0pt'>
WIDTH: map.size.w,<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 face="Courier New"><span style='font-size:
10.0pt'>
HEIGHT: map.size.h},<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 face="Courier New"><span style='font-size:
10.0pt'>
"http://10.128.78.27:8080/geoserver/gwc/service/wms");<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 face="Courier New"><span style='font-size:
10.0pt'> OpenLayers.loadURL(url, '', this, setHTML, setHTML);<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 face="Courier New"><span style='font-size:
10.0pt'> OpenLayers.Event.stop(e);<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 face="Courier New"><span style='font-size:
10.0pt'> }<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 face="Courier New"><span style='font-size:
10.0pt'><o:p> </o:p></span></font></p>
<p class=MsoPlainText><font size=2 face="Courier New"><span style='font-size:
10.0pt'>Thanks<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 face="Courier New"><span style='font-size:
10.0pt'>Raj.<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 face="Courier New"><span style='font-size:
10.0pt'><o:p> </o:p></span></font></p>
<p class=MsoPlainText><font size=2 face="Courier New"><span style='font-size:
10.0pt'><o:p> </o:p></span></font></p>
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<title>State Information Technology Age</title>
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<p><font face="Arial" color="#2265a8" size="1"> </font><font face="Arial" color="#2265a8" size="1">
<span style="font-size: 7.5pt; color: #2265a8; font-family: Arial">
</span></font></p>
<font face="Arial" color="#2265a8" size="1"><span style="font-size: 7.5pt; color: #2265a8; font-family: Arial"><hr
color="#cccccc" SIZE="0"><font size="2">
<span lang="EN-US" style="font-size: 8.5pt; font-weight: 700">State
Information Technology Agency (Proprietary) Limited</span></font><font face="Arial" color="#2265a8"
style="font-size: 8.5pt"><span style="color: #2265a8; font-family: Arial">
? </span></font><font size="2">
<span lang="EN-US" style="font-size: 8.5pt">Reg No<font color="blue"><span style="color: blue">
</span></font></span></font></span></font>
<font face="Arial" color="#2265a8" style="font-size: 8.5pt">
<span style="color: #2265a8; font-family: Arial"><span lang="EN-ZA">
1999/001899/07,<br>
</span>459 Tsitsa Street, Erasmuskloof, Pretoria, South Africa ? PO
Box 26100, Monument Park, 0105, South Africa<br>
Tel: +27 12 482 3000 ? Fax +27 12 482 2100 ?
<a style="color: blue; text-decoration: underline" href="http://www.sita.co.za/">
<font color="#0082d6"><span style="color:
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7.5pt; color: #797171; font-family: Arial"><hr color="#cccccc" SIZE="0">
</span></font><span style="color: #797171; font-family: Arial"> <font face="Arial" color="#797171" style="font-size:
8.5pt"><b>Directors</b>
: Ms Z P Manase (Chairperson), Ms M O Williams (Deputy Chairperson), Ms
C B Clark, Mr C C W Kruger, Mr M A Luthuli, Ms M Makhekhe-Mokhuane,
Ms R Sekese Company
Secretary: Ms E Strydom </font></span><b> <span style="font-size: 7.5pt; color: #797171; font-family: Arial"><font
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