[mapguide-users] RE: Ajax Viewer Events

[Scott McFarlane]

GM,

Look at the GetSelectionXML() function found in the map frame. That will
return XML that you can parse to get the properties of the currently
selected object.

Open up ajaxmappane.templ and search for SetProperties, and you'll see how
the viewer collects the properties and passes them to the properties pane.

- Scott

-----Original Message-----
From: mapguide-users-bounces at lists.osgeo.org
[mailto:mapguide-users-bounces at lists.osgeo.org] On Behalf Of GM_Mizar
Sent: Tuesday, March 13, 2007 9:47 AM
To: mapguide-users at lists.osgeo.org
Subject: [mapguide-users] RE: Ajax Viewer Events


Thanks a lot!

Another question coming...
with your method I can catch the OnSelectionChanged event and use my code.
Now I'm trying to get info from the map, I can use the GetSelectedCount() to
get the number of selected object, I can query the feature source
server-side but...is there a method to access data of the selected features
client-side (with javascript)? For instance, the SetProperties method of the
property panels has a parameters which is an array of couples
property-value, properties can be configured using the MapStudio in the
layer definition.

Thanks again!

Bye
GM



Scott McFarlane wrote:
> 
> GM,
> 
> I've seen several solutions to this problem on this list, but most of them
> seem to require that you modify the built-in ajax viewer template files,
> which I personally don't like to do.
> 
> As long as your status bar frame comes from the same web server as the
> viewer, and stays visible during the session, the following method should
> work. This method accomplishes the same thing as modifying the source code
> of the template files, but instead it is done at run-time. The basic
> concept
> is that you make a copy of the original OnSelectionChanged function (found
> in the main frame) and then you redefine it with your own code, which in
> turn, calls the original copied function.
> 
> In your status bar page, you can put the following JavaScript code. You'll
> need to ensure that the main frame for the ajax viewer is loaded before
> this
> code executes, so depending on how your overall page loads, this code may
> need to be wrapped into a function that waits until it knows the main
> frame
> is available.
> 
> // This needs to find the main frame of the ajax viewer
> // It depends on the relationship of this frame with other frames
> var main = parent.parent;
> 
> // Copy the original OnSelectionChanged function
> if(typeof main.osc == 'undefined')
> 	main.osc = main.OnSelectionChanged;
> 
> main.OnSelectionChanged = function()
> {
> 	// Add your code here
> 	// ...
> 
> 	// Call the original function
> 	main.osc();
> }
> 
> Hope this helps,
> 
> - Scott
> 
> -----Original Message-----
> From: mapguide-users-bounces at lists.osgeo.org
> [mailto:mapguide-users-bounces at lists.osgeo.org] On Behalf Of GM_Mizar
> Sent: Tuesday, March 13, 2007 5:20 AM
> To: mapguide-users at lists.osgeo.org
> Subject: [mapguide-users] Ajax Viewer Events
> 
> 
> Another time here with another boring problem, this time regarding the
> AJAX
> viewer. 
> 
> I have a status bar external to the viewer, here I can write messages for
> the user. I want to write here the description of the selected object but
> I
> want that this description changes when I select a new object in the map.
> 
> I'm trying to catch the "selection" event but I haven't found any viewer
> API
> to perform this operation. I've also checked the html code of the property
> panel, I've seen that the javascript function "SetProperties" is called
> each
> time ore or more object are selected.
> 
> I'm thinking about replacing the page of the property panel with one which
> contains the same function "SetProperties", here I can update my external
> status bar. Unfortunately this solution has two disadvantages:
> 1)	the property panel should be visible (and I don't want it)
> 2)	I have to change a file under the installation folder of the
> MapGuide
> server (exactly the
> "\WebServerExtensions\www\mapviewernet\propertyctrl.aspx"), this can
> create
> problems in deployment and maintenance of the application
> 
> Now the questions:
> 1)	can I catch the event related to the selection of an object in the
> Ajax
> Viewer?
> 2)	if not, is it possible to change the link of the page shown in the
> property panel? 
> 
> Thanks a lot for replies.
> GM
> 
> 
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> 
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