Post a small example and what browser you are using.
The problem exists in any flex app that I run in any browser - both my own apps and anyone elses.
If I make any flex app in Flex Builder 3 using any sdk from 3.2 to 3.5 and run under any browser or the stand alone player I get the same issue.
I am running Windows 7.
The issue is that the mouse cursor [capture?] looks to be off by a pixel and a custom component will never have the cursor at mouseX==0.
So if the cursor is 1 pixel to the right of a button for example, that button will be highlighted (wrongly).
If the cursor is on the left-most pixel column of any uiComponent then flex does not seem to recognize the cursor is over that component until the mouse is moved another pixel right, but then it's at local coordinate 1 (mouseX == 1), so skips a column.
There is nothing much I can post therefore though the green box in the image shows the offset horizontal area in which a button appears selected/highlighted (the vertical accuracy is fine).
You can check the bug base to see if anyone has filed this issue. It might
be Win7 specific. I don't have Win7 and it is working fine on my Mac.
I can't see it in the database. The same issue exists in flash, not surprisingly.
Can anyone out there with Windows 7 confirm or deny this on their machine?
NB: I have 64bit win7
out of interest i tried it on mine running XP, and it exists there as well.
curiosity led me to see how accurate there buttons in other apps were, the minimize/maximize/close buttons on all my open windows measure it inaccurately, so do some buttons in firefox/internet explorer.
minimized tabs on the taskbar have the same kind of issues as well, as do items in the start menu
ok well maybe not just windows 7 then.
But just to be clear I don't see any issue with cursor selection outside of flash content. It's a flash-specific issue.
If we believe Adobe (I've no good evidence saying we shouldn't) this shouldn't be OS or browser specific at all.
Perhaps the coordinate starts with 1 by design (stupid design then, must be taking lessons from Sun).
Or could it be due to having 1 pixel set aside for a border? But you're saying it doesn't do this at all vertically? Or on the opposite side of the button?
no it is not a border thing and the coordinate system is fine.
It is just as if the selection area for all ui components is shifted 1 pixel to the right.
But initially I would like some confirmation that this is not just on my PC (from other windows users).