Mac Drag Problems

Question

Hello,
I have an application built in Flex for AIR that has two
windows, and one window has a TileList that you can click on and
drag items to the other window. This functionality works great and
has been working fine on the PC, but now on the Mac it occasionally
stops working. By this I mean that when you click on a tile, it
never goes into dragging mode. The only way for our users to fix
this is to close the application and start it back up. We used to
have this tile list in the same window and never had a problem with
the dragging then, it was only when moving the list into a new
window. We are using a standard TileList with dragEnabled set to
true and it is really baffling why this has no problems on the PC
but happens on the Mac and is very difficult to duplicate the steps
taken to make it happen. Below is the TileList, the place where it
is being dropped doesn't necessarily matter because the tiles never
switch to being a drag icon, so it is obvious that the drag is not
starting.
<mx:TileList
id="assetList"
dataProvider="{assetManager.assetList}"
dragEnabled="true"
dragMoveEnabled="false"
allowMultipleSelection="true"
columnWidth="106"
rowHeight="106"
width="60%"
height="100%"
borderStyle="solid"
borderColor="0x7d7d7d"
backgroundColor="0x7d7d7d"
shadowDistance="0"
dropShadowEnabled="true"
change="selectThumbnail(event)"
doubleClickEnabled="true"
itemDoubleClick="doubleClickAsset(event)"
selectedIndex="{assetManager.assetList.getItemIndex(assetManager.selectedAsset)}"
>
<mx:itemRenderer>
<mx:Component>
<assets:AssetThumbRenderer/>
</mx:Component>
</mx:itemRenderer>
</mx:TileList>
Does anyone have any ideas what would cause a TileList to
stop doing drag? Is there any way to force it back to allow drag?
Is there a flag that needs to get reset that possibly isn't getting
reset? Let me know if you have any suggestions or if you want to
try installing the application and see for yourself.
Todd

Answer 1

When I drag and Drop on a Mac (OS 10.2.3), the OS
builds a transparent image of the component being
dragged and uses it instead of the default cursors.
This wouldn't be a big problem except that the
component it renders is the ENTIRE spreadsheetThis is the default behavior on Mac. You can manually set the dragimage in startdrag(...) in dragGestureRecognized(). So you just need to create an image of what your are actually dragging.
If you simple want to remove the image just set it to some 1x1 pixel image or a transparent gif...