Table of contents for flex-tips

1. Problem with XML attributes in AS3.0
2. Unable to export SWC oem
3. Numeric sorting of Flex DataGridColumn

I’ve found today some small problem with setting XML attribute for my current application. I’m generating HTML source code via XML, because both are tags languages and I have found this nice problem. Imagine you have DIV tag with class attribute set like this:

<div class="myClass">test</div>

So in ActionScript 3 you can create it via XML in this way

var divXML:XML = <div>test</test>;
divXML.@class = "myClass";

All seems ok and trivial, but Flex Builder has problem to compile second line. It seems that @class is reserved word, because I can change to other attribute name and it works. But luckily there are different ways how to set XML attribute for XML node.  I’ve fixed it in this way

var divXML:XML = <div>test</test>;
divXML.@["class"] = "myClass";

What is your preffered  way to set XML attributes?

Table of contents for air-tip

1. AirTip: Problem with app.xml in Flex 3
2. AirTip: AIR application gained focus
3. AirTip: List all of your drives in AIR application
4. Adobe AIR 1.5 available in Flex SDK Nightly builds
5. AIR Tip: ContextMenuItem can crash AIR app on Windows
6. AIR Tip: Flash movie is not rendered in AIR 1.5 HTML in Fullscreen

This is just quick tip for all AIR developers. If you are developing AIR application and you want to use ContextMenu please be aware of possible problem on Windows platform. This is not problem on Mac, and it’s not problem in Flash Player (even on Windows). It is problem just in AIR on Windows (at least what I have find out till now).

Problem is as follow:

You want to have ContextMenu for some of your item (right click menu). You have created ContextMenu and want to add ContextMenuItem in this way

var myItem:ContextMenuItem = new ContextMenuItem(myItemName);

if variable myItemName is initialized or at least is empty string, all is ok. But there can situations when it is null. For example when you want to support multilanguage with ResourceManager, so it’s not correctly fill up and it’s null. In that case you AIR will crash and you will not know why, because it’s works on Mac, it works in FlashPlayer (without AIR), it just doesn work in AIR on Windows platform

So my quick fix was create fix function, like this

private function fixEmptyString(val:String):String
{
	if (val == null)
		return '';
 
	return val;
}
 
var myItem:ContextMenuItem = new ContextMenuItem(fixEmptyString(myItemName));

This will for sure.

Hope this helps you.

P.S. I will post this and another useful AIR tips in my Franto.com Tips & Tricks, so do not wait and subscribe to my list, if you find AIR tip this useful…

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