viewSourceURL: publish source in Flex

Call me slow, but this one eluded me for a little bit, as I couldn’t find a how-to in the Flex help documentation regarding publishing source code. It’s actually just as easy as pushing the Publish Application Source button–just keep in mind that it’ll rely on your primary MXML file as the index page of the source code.

Flex Chart Labels Based on Numeric Values

I thought there’d be a way to inherently modify chart labels in Flex while basing them on the chart’s values. There doesn’t seem to be such a built-in property, however, you can easily use the labelFunction method. In the example below (right-click to view source), I’m setting a labelFunction of changeLabel on a LinearAxis tag. It calls a switch statement to determine what to relabel the value. Note: The relabeled values are all even numbers because the major ticks on the chart are even.

Resetting RadioButtonGroup in Flex

Ever try resetting a RadioButtonGroup in Flex? I didn’t find it so clear… Unselected radiobuttongroups are set to “null”, but I tried setting all of the radio buttons selected = “false” to start. When that didn’t work, I then tried setting the radiobuttongroup.selectedValue = “null”.

The solution is to set radiobuttongroup.selection = null; in ActionScript. Sample and source code below.

Flex SecurityError: Error #2148 While Accessing local XML

So you’ve published your Flex application that accesses local XML, but when you try to run it outside of your Flex Builder folder, you might get a Flash Player Debugger error #2148. I ran into this problem while on a tight deadline, and am reposting here to get the word out.

To fix this, you need:

1. to right/control click your Flex Project folder in the Navigator
2. Select properties
3. Choose Flex Compiler in the popup window
4. Add “-use-network=false” under Additional compiler arguments

Hopefully, this’ll save someone some time…