Here's my solution (simplified):
<!-- Javascript part -->
<script type="text/javascript">
var mapFrame = null; // A reference to the map frame
var originalMapFrameOnSelectionChanged = null // storage for the original
onSelectionChanged function
function OnSelectionChanged() // when something is selected on the map
{
alert('Your handler works perfectly');
originalMapFrameOnSelectionChanged();
}
function InitDocument()
{
mapFrameRef = frames[0].frames[1];
originalMapFrameOnSelectionChanged = mapFrameRef.parent.OnSelectionChanged;
mapFrameRef.parent.OnSelectionChanged = OnSelectionChanged;
}
</script>
<!-- HTML part -->
<html>
<body onload="javascript:InitDocument()">
<iframe id="viewerFrame" frameborder="yes" width="100%" height="60%"
src="
src="../mapviewernet/dwfviewer.aspx?SESSION=<%=sessionId%>&WEBLAYOUT=<%=webLayout%>""></iframe>
</body>
</html>
So, body onload calls InitDocument which registers the new OnSelectionChanged
event handler. The new handler only pops up a dialog box and then calls the old
function. The MG Viewer is embedded in an iframe.
________________________________
Lähettäjä: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Puolesta Tanja Suikkanen
Lähetetty: 28. huhtikuuta 2008 14:10
Vastaanottaja: [email protected]
Aihe: Re: [mapguide-users] OnSelectionChanged in AJAX viewer?
My map is embedded in my own page.
When a user selects one or more features on the map, I want my own function to
be executed.
But doesn't parent.parent.mapFrame still get me the map frame..?
And this works but only when I click some button.
Tanja
From: Kenneth, GEOGRAF A/S [mailto:[EMAIL PROTECTED]
Sent: 28. huhtikuuta 2008 13:57
To: [EMAIL PROTECTED]; MapGuide Users Mail List
Subject: SPAM-LOW: Re: [mapguide-users] OnSelectionChanged in AJAX viewer?
Are you issuing the script from a command?
If you want to do this all the time (regardless of what the user has done), you
must load the script with the solution.
If your map is embedded in another page, you can load the script there, and
change "var map = parent.parent.mapFrame;" to point to the correct frame.
If it is just the basic layout, you can try to put it in the page that loads in
the taskpane (but beware that the document gets unloaded if the user navigates).
As a last resort, you can embed the script in the viewerfiles.
In case you can use the embedded map approach, you should place the following
line after the "try {":
map = document.getElementById('<insert iframe/frame id>').GetMapFrame()
Regards, Kenneth, GEOGRAF A/S
Tanja Suikkanen skrev:
Ok, I sent my code snippet earlier today, but here it is again.
I got this example from
http://trac.osgeo.org/mapguide/wiki/CodeSamples/JavaScript/AJAXViewerEventHooking.
var map = parent.parent.mapFrame;
var origOnSelectionChanged = null;
function MySelectionHandler()
{
origOnSelectionChanged();
var selCount = map.GetSelectedCount();
if(selCount > 0)
{
My function() {}
}
}
window.onload = function() {
var timer;
var watch = function() {
try {
if(map.mapInit) {
clearInterval(timer);
origOnSelectionChanged = map.OnSelectionChanged;
map.OnSelectionChanged = MySelectionHandler;
}
}
catch(e) {
}
};
timer = setInterval(watch, 200);
};
Window.onload function is executed only, if I press a button.
I want to have the functionality I was telling you about without any button
clicks.
Please ask if I don't tell you enough.
Tanja
From: Ivan Milicevic [mailto:[EMAIL PROTECTED]
Sent: 28. huhtikuuta 2008 12:04
To: [EMAIL PROTECTED]; MapGuide Users Mail List
Subject: RE: [mapguide-users] OnSelectionChanged in AJAX viewer?
Feature doesn't get highlighted?
Of course that you can add this functionality in your own code, the logic is
same. Allwas call mapFrame functions (via JavaScript) or count selection from
C# or PHP.
If you want to get some help over here, be more specific.
Ivan.
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Tanja Suikkanen
Sent: Monday, April 28, 2008 10:46 AM
To: [email protected]
Subject: RE: [mapguide-users] OnSelectionChanged in AJAX viewer?
Ok, now it worked but some functionality had been removed?
When I first select a feature, everything goes fine but when I select another
feature, that doesn't get highlighted...
Also I wouldn't like to change the original files, just add my own
functionality in my own code files.
But thanks anyway!
Tanja
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