how we get item numbers when we drag and drop item in a list based control.

Tahir Alvi

I just look through the source code. The Image class (\frameworks\projects\framework\src\mx\controls\Image.as) isn’t very exciting. It only has the dataChange event metadata and there is only one instance of the dispatchEvent() method being called (from the data property setter function). The next trick is to browse the superclass (in this case SWFLoader.as) and see what it has.
Quickly searching for “dispatchEvent(“, we can see the following undocumented events (probably since you’d probably never need them in your applications):
– “autoLoadChanged” event (dispatched from autoLoad setter)
– “loadForCompatibilityChanged” event (dispatched from loadForCompatibility setter)
– “loaderContextChanged” event (dispatched from loaderContext setter)
– “maintainAspectRatioChanged” event (dispatched from maintainAspectRatio setter)
– “scaleContentChanged” event (dispatched from scaleContent setter)
– “sourceChanged” event (dispatched from source setter)
– “trustContentChanged” event (dispatched from trustContent setter)

Or, another approach is to search the source code for the following string:

new Event("

Using TextPad, I searched the entire \frameworks\projects\framework\src\ folder for all .AS files and it found 245 occurrence(s) in 51 file(s).
Here’s the results for the SWFLoader class (odd, I’m not sure why “loadForCompatibilityChanged” event didn’t appear in this list):

mx\controls\SWFLoader.as(445): dispatchEvent(new Event(“autoLoadChanged”));
mx\controls\SWFLoader.as(706): dispatchEvent(new Event(“loaderContextChanged”));
mx\controls\SWFLoader.as(742): dispatchEvent(new Event(“maintainAspectRatioChanged”));
mx\controls\SWFLoader.as(808): dispatchEvent(new Event(“scaleContentChanged”));
mx\controls\SWFLoader.as(929): dispatchEvent(new Event(“sourceChanged”));
mx\controls\SWFLoader.as(993): dispatchEvent(new Event(“trustContentChanged”));

The entire list is too long (and boring) to post here though.

Happy Flexing!
Peter

Thanks for the tip – very helpful!!

I’m not sure, but does calling img.validateNow(); help?

Peter

Any help is appreciated. Thanks in advance.

Barry

There are several “undocumented” events in the Flex API. These events weren’t really meant for public use, but they can be useful in certain circumstances.

Peter