[mapguide-users] OnSelection Event?

Fri Jan 9 12:54:59 EST 2009

you can't use document.getElementById() to access frames, you have to
reference the frame with a variable of the same name, and your frame/iframe
must have its "name" attribute defined

- Jackie 


clarkie342 wrote:
> 
> After posting my question I did find a reference to the sample you have
> sent below. It was well explained, but it did not work with my code. So I
> tried to add it to the <HEAD> of the dotnetviewersample.aspx. It did not
> work their either.
> 
> The problem with my code as I noticed is this javascript is not able to
> get a reference to my viewer frame.
> As I mentioned I am using an iframe with id 'viewerFrame'. My app uses
> master pages and this iframe is inside a contentplaceholder. I also tried
> 
> document.getElementById(“viewerFrame”).contentWindow.GetMapFrame();
> 
> came back as object not found. Am I working with the right issues or is it
> all supposed to work irrespective of the frame type? Thanks for any help.
> 
> 
> Jackie Ng wrote:
>> 
>> This is javascript code that hooks onto events from the viewer frame. 
>> 
>> So the code should go in the page that launches the viewer frame.
>> 
>> A more detailed explaination here:
>> http://trac.osgeo.org/mapguide/wiki/CodeSamples/JavaScript/AJAXViewerEventHooking
>> 
>> - Jackie
>> 
>> 
>> clarkie342 wrote:
>>> 
>>> Hi Jason,
>>> 
>>> I am trying to implement your suggestion below to make use of the
>>> OnSelectionChanged Event Handler in mainframe.templ
>>> I have a asp.net page with iframe showing a mapguide map. I want to be
>>> able to do bunch of things when the user selects features on this map. 
>>> I am not very clear on how you are implementing your SelectionChanged
>>> function instead of the original one. Where should this script go?
>>> Appreciate your help.
>>> 
>>> Thanks
>>> 
>>> 
>>> Jason Birch wrote:
>>>> 
>>>>  
>>>> There is an OnSelectionChanged function in the main frame, but it
>>>> doesn't appear to be documented.
>>>>  
>>>> I've just tried playing around with this, and I got the following to
>>>> work when inserted into the <head> of the ajaxviewersample.php file. 
>>>> It does not appear to work with the DWF viewer; maybe why it's not
>>>> documented?  Or it could just be that my code is bad :)
>>>>  
>>>> <script type="text/javascript" >
>>>>                               
>>>> var originalOnSelectionChanged;
>>>> var initTimer = setInterval(watchInitialized, 200);
>>>> 
>>>> function watchInitialized () {
>>>>  try {
>>>>   if(ViewerFrame.mapFrame.mapInit) 
>>>>     {
>>>>    clearInterval(initTimer);
>>>>    originalOnSelectionChanged = ViewerFrame.OnSelectionChanged;
>>>>    ViewerFrame.OnSelectionChanged = MyOnSelectionChangedHandler;
>>>>     }
>>>>    }
>>>>    catch(Exception) {}
>>>> }
>>>> 
>>>> function MyOnSelectionChangedHandler() {
>>>>    originalOnSelectionChanged ();
>>>>    var mapFrame = ViewerFrame.GetMapFrame();
>>>>    selCount = mapFrame.GetSelectedCount();
>>>>    alert("Selected: " + selCount);
>>>> }
>>>>  
>>>> </script>
>>>> 
>>>>  
>>>> 
>>>> ________________________________
>>>> 
>>>> From: Willem Schwarte [mailto:willem at giskit.nl]
>>>> Subject: [mapguide-users] OnSelection Event?
>>>> 
>>>> 
>>>> I suppose there is no onSelectionChanged event like in MG6.5. So this
>>>> would be done on a onClick? Where would I put the code for this?
>>>> 
>>>>  
>>>> 
>>>> 
>>>>  
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>>>> 
>>> 
>>> 
>> 
>> 
> 
> 

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