Antun’s Blog

Whether you realize it or not, you often use a subclass of the basevaluecomponent in OpenLaszlo. A typical example is radiobutton (which is used with radiogroup). The example for radiogroup in the OpenLaszlo reference is pretty simple:

<canvas debug="true">
<radiogroup id="group1">
<radiobutton value="1" text="one"/>
[...]

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The current release of OpenLaszlo doesn’t like empty handler tags. If you compile the following code, you’ll get a compiler warning:

<canvas debug="true">
<handler name="oninit">

</handler>
</canvas>

The warning will say:
“Refusing to compile an empty handler, you should declare the event instead”
This wasn’t the case previously. The warning is intended to educate [...]

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When you want to trace something to the Debugger in OpenLaszlo, you can call the Debug.write() method.

Often, you’ll want to write the value of something and a label, so that you can identify that output in the debugger, something like:
Debug.write(”subviews: ” + canvas.subviews);
However, it’s better to to get into a habit of use commas instead [...]

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