Hello,
As far as I know, it is still impossible to have transparent
background of IKImageBrowserView?
I am writing to be 100% sure for that. Maybe I have missed something?
All my attempts to create transparent IKImageBrowserView failed.
I have tried:
* (1) setting background color for IKImageBrowserView as itself using
IKImageBrowserBackgroundColorKey. That works well until color alpha is
equal to 1.0. Bellow that color is ignored (color does not change) or
background is changed back to default white. Or... looks like given
color is composited on a white background.
* setting CALayer as IKImageBrowserView's backgroundLayer:
** (2) using property backgroundColor of CALayer. No background
transparency, scrolling ghosts, misc garbages during start-up - some
parts of menubar, other windows are visible for a few moments after
program launch.
** using custom drawing ( -
(void)drawInContext:(CGContextRef)context ) in CALayer subclass:
*** (3) drawing transparent image to fill background. No
transparency for IKImageBrowserView, some strange ghosts while
scrolling.
*** (4) filling background with transparent color (alpha < 1.0).
Behaves close to previous variant. "Size" of ghosts depends on alpha
value.
On 3 and 4, flushing context or telling it to clear visible rect makes no sense.
Best Regards,
Rimas M.
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