[Laszlo-user] Quickie link callback [cool stuff]

[jamesr]

By doing the some proper templating on the server-side response this  
would give an htmlesque feel to a laszlo application; a "screen" full  
of "links" can invoke another screen of links. Using a fairly  
standard approach to how pages are generated in html-land, that is,  
the created links control behavior. This could break open one  
conceptual limitation in invoking large amount of documentation/ 
subviews that are relationally related to each other. Another way of  
saying the same thing is since the action of the <a>..</a> can be  
scripted server side, the "link" can instruct a the program to fetch  
yet another server url that populates the same or other areas in the  
application.

Thanks for the tip!


On Jun 4, 2007, at 7:16 PM, Maynard Demmon wrote:

> Here is a little piece of laszlo code you might find usefull. It lets
> you do an easy callback to your lzx app when a user clicks on a link
> defined in a <text> component. Note that the syntax of
> Lz.setCanvasAttribute is in the 4.x not the 3.x format of this call.
>
> 	var msg1 = "<a
> href=\"javascript:Lz.setCanvasAttribute 
> ('linkcallback','action1:value')\
> ">do action 1</a>";
> 	var msg2 = "<a
> href=\"javascript:Lz.setCanvasAttribute 
> ('linkcallback','action2:value')\
> ">do action 2</a>";
> 	myTextComponent.setText("stuff" + msg1 + "other stuff" + msg2 +
> "event more stuff");
>
> Code in main.lzx to handle the linkcallback action would look  
> something
> like this:
>
> 	<!-- ATTRIBUTES -->
> 	<attribute name="linkcallback"/>
> 	
> 	<!-- EVENT HANDLERS -->
> 	<method event="onlinkcallback" args="v">
> 		var index = v.indexOf(":");
> 		var type = v.substring(0, index);
> 		var value = v.substring(index + 1);
> 		switch (type) {
> 			case "action1":
> 				// do something
> 				break;
> 			
> 			case "action2":
> 				// do something
> 				break;
> 			
> 			// More cases for additional actions as needed
> 		}
> 	</method>
> 			
> Maynard Demmon - mdemmon at laszlosystems.com
> Senior Developer - Laszlo Systems
>
>