Thanks you both, but I think these dont work, cause I have Ajax viewer and OnSelectionChanged is an ActiveX control.
Any ideas with Ajax? Tanja From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Kenneth, GEOGRAF A/S Sent: 28. huhtikuuta 2008 16:01 To: MapGuide Users Mail List Subject: Re: [mapguide-users] OnSelectionChanged in AJAX viewer? I made a small mistake. The retry condition should not be: if (mapFrame == null) window.setTimeout("RetryInit();", 500); but if (originalMapFrameOnSelectionChanged == null) { mapFrame = null; window.setTimeout("RetryInit();", 500); } Because the frame may exist, but the function might be missing. Regards, Kenneth, GEOGRAF A/S Kenneth, GEOGRAF A/S skrev: You must safeguard against timing problems. It is very likely that your frame will load completely before the iframe does. In that case, you cannot get the OnSelectionChanged method reference. You can add an "onload" to the iframe, but it is still possible that it will break, because the internal frames do not load in the expected order. A simple fix is to wrap your "InitDocument" with a timer. Also, using the "frames[0].frames[1]" is relying on the order of your page, and the order of the viewer frames. A more reliable method, is to use the ID if the frame element, and then use the built-in method GetMapFrame(). I have applied the above to your example: <!-- 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() { var win = document.getElementById('viewerFrame'); if (win.contentWindow) //FF returns the actual tag, IE returns the iframe win = win.contentWindow; mapFrameRef = win.GetMapFrame(); originalMapFrameOnSelectionChanged = mapFrameRef.parent.OnSelectionChanged; mapFrameRef.parent.OnSelectionChanged = OnSelectionChanged; } function RetryInit() { if (mapFrame != null) return; try { InitDocument(); } catch (e) { mapFrame = null; } if (mapFrame == null) window.setTimeout("RetryInit();", 500); } </script> <!-- HTML part --> <html> <body> <iframe id="viewerFrame" frameborder="yes" width="100%" height="60%" src=" src="../mapviewernet/dwfviewer.aspx?SESSION=<%=sessionId%>&WEBLAYOUT=<%=webL ayout%>"" onload="RetryInit()"></iframe> </body> </html> Regards, Kenneth, GEOGRAF A/S Kimmo Kotajärvi skrev: Heres 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()> "javascript:InitDocument()"> <iframe id="viewerFrame" frameborder="yes" width="100%" height="60%" src=" src="../mapviewernet/dwfviewer.aspx?SESSION=<%=sessionId%>&WEBLAYOUT=<%=webL ayout%>""></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 doesnt 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/AJAXViewerEventHo oking. 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 dont 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 doesnt get highlighted Also I wouldnt like to change the original files, just add my own functionality in my own code files. But thanks anyway! Tanja _____ _______________________________________________ mapguide-users mailing list [email protected] http://lists.osgeo.org/mailman/listinfo/mapguide-users _____ _______________________________________________ mapguide-users mailing list [email protected] http://lists.osgeo.org/mailman/listinfo/mapguide-users
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