[Chameleon] Widgets or JSAPI

[Jason Fournier]

After some deep Chameleon soul searching I remembered the Customizing 
Query Results:

http://chameleon-tiki.maptools.org/tiki-index.php?page=QueryWidgetCustomizingResults 


This is a relatively simple method of accomplishing your task without 
having to create a widget.  Basically, you will have a link widget 
which, when used, gets intercepted by the Global Event Manager.  At this 
point you can call anything you want in javascript.

You shouldn't have to get e or event for this IF you include the 
CursorPos widget (for X & Y).  In your js callback you will be able to 
get the coordinates via the form variables:

document.formname.CursorPos_X.value
document.formname.CursorPos_Y.value

So, let's say that in your body onload you specify:

goEventManager.registerForEvent( 'ON_QUERY', 'cbLocation' );

so that when you perform a 'query' the following gets called:

function cbLocation()
{
      var nX = document.formname.CursorPos_X.value;
      var nY = document.formname.CursorPos_Y.value;
      window.opener.document.formname.nXLocation.value = nX;
      window.opener.document.formname.nYLocation.value = nY;
      self.close();
}

Although I haven't tested this code it should work.  CursorPos_X and 
CursorPos_Y do all the work for you in getting the coords.  You just 
have to reference them and pass them back to your opener.

Make sense?

Jay




Seiple, Timothy E wrote:
> You mention "grabbing these values with [my] onclick when over the map".
> How do I build this onclick event?
> 
> Let's say I have an html button in my template that calls a JavaScript
> function.  This function would have to somehow focus on the mouse,
> access the map object, and accept onclick event arguments - all from the
> template file.
> 
> I see the JSAPI offers the mouseclick property of the CWCApplication.
> Is there an equivalent widget property (e.g. <cwc2 type=MapDHTML
> onclick=getxy() .../>)?
> 
> 
> -----Original Message-----
> From: chameleon-bounces at lists.maptools.org
> [mailto:chameleon-bounces at lists.maptools.org] On Behalf Of Jason
> Fournier
> Sent: Tuesday, August 16, 2005 10:21 AM
> To: chameleon at lists.maptools.org
> Subject: Re: [Chameleon] Widgets or JSAPI
> 
> Timothy,
> 
> I think the cursorpos widget populates the CursorPos_X, CursorPos_Y form
> vars with the current geographic position:
> 
> document.formname.CursorPos_X.value
> document.formname.CursorPos_Y.value
> 
> (note that these are the cursospos labels)
> 
> You could grab these values with your onclick when over the map and pass
> them back to your opener.
> 
> I would take a look at the MapNotes widget.  It has much of the
> functionality that you going after ... it should shed some light.  This
> functionality includes allowing a widget to have control over map
> onclicks, etc.
> 
> You shouldn't have to use JSAPI for this functionality - it can be
> achieved with Chameleon in the default mode.
> 
> Jay
> 
> 
> 
> 
> Seiple, Timothy E wrote:
> 
>>I have a web application that requires the user to manually enter 
>>coordinate information into a form.  I would like to provide a button,
> 
> 
>>whose on_click event will launch an instance of chameleon with a map 
>>that allows the user to click on the map to get the coordinates.  The 
>>coordinates must then be passed as variables back to the calling form.
>>A remote Oracle DB will provide the spatial data and store the 
>>captured coordinate information.
>>
>>Can I do this with Widgets or must I use the JSAPI?  I am confused 
>>about where I can place scripts.  For example, my template uses the 
>>Cursorpos Widget to dynamically display {x,y} but how do I capture 
>>these in variables that can be passed to other pages?  I can see the 
>>Chameleon generated JavaScripts and variables in the page source but 
>>don't know how to interact with them.
>>
>>I need some help understanding the big picture.
>>
>>Thanks,
>>Tim
>>
>>
>>----------------------------------------------------------------------
>>--
>>
>>_______________________________________________
>>Chameleon mailing list
>>Chameleon at lists.maptools.org
>>http://lists.maptools.org/mailman/listinfo/chameleon
> 
> 
> --
> ________________________
> Jason Fournier
> 
> DM Solutions Group Inc.
> jfournier at dmsolutions.ca
> www.dmsolutions.ca
> 613.565.5056 x18
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-- 
________________________
Jason Fournier

DM Solutions Group Inc.
jfournier at dmsolutions.ca
www.dmsolutions.ca
613.565.5056 x18