When you say "superimposed over the dock icon", do you mean you use [NSApp
dockTile], or actually put an NSPanel over the dock? I'm using dockTile to put
up a progress bar - it's a custom one that's gray & white, but it works fine.
The sample app for dockTile is easily tweaked.
On Aug 14, 2012, at 8:39 AM, Tim Hewett wrote:
> My app has been displaying a progress indicator superimposed over the dock
> icon successfully until more recent MacOS versions. With the latter it
> appears as a black bar instead of blue (currently testing on Mountain Lion
> but suspect Lion has the same problem, Snow Leopard and previous ones are ok).
>
> Previously to get it to work it was necessary to subclass NSPanel and
> override the isKey selector to always return YES, to make sure that the image
> generated from the progress indicator (using the dataWithPDFInsideRect:
> selector) was blue and not grey. The panel itself is never displayed, it is
> just a dummy one to give the indicator a "key" window to be part of to allow
> it to show a blue bar.
>
> The NSView drawRect: selector has been tried instead to fill in the image in
> place of dataWithPDFInsideRect:, now it is grey and no longer updates after
> the first progress increment. This alternative approach works fine on 10.5.8
> as does the original one, but not on Mountain Lion again.
>
> If the progress indicator is temporarily added to the content view of a
> normal key window instead of the dummy one then it displays fine as a blue
> bar in the dock icon, so the challenge seems to be to get the NSPanel
> subclass to spoof a key window and get the indicator to display its blue bar.
> Somehow that seems to have been lost.
>
> I've tried overriding the panel isVisible and isMainWindow selectors to
> always return YES, to no effect.
>
> N.B. the progress indicator is also subclassed to allow control over the wave
> animation, saved a lot of CPU time on older Macs.
>
> Anyone solved this one on Mountain Lion/Lion?
>
> (Also slightly OT, I need to find out how to download Lion to keep it
> available as a bootable volume for testing. It never showed in App Store as I
> never purchased it there due to my Mac coming with it pre-installed, and
> still doesn't show now even when option-clicking on the Purchases icon. Is
> there a way to get a (legitimate and official) copy down somehow?)
>
> Regards,
>
> Tim.
>
>
> Code snippets:
>
> Initialisation:
>
> // *** Create/init an off-screen progress indicator - has no window or
> superview.
> // *** Set the width to 128 to match that of the dock icon.
> dockProgressBar = [[MyStaticProgressIndicator alloc] init];
> NSRect rect = {{0.0,0.0},{128.0,12.0}};
> [dockProgressBar setFrame:rect];
> [dockProgressBar setIndeterminate:NO];
> [dockProgressBar setControlTint:NSBlueControlTint];
> [dockProgressBar setControlSize:NSSmallControlSize];
>
> dockProgressBarWindow = [[MyAlwaysKeyPanel alloc] init];
> [dockProgressBarWindow setContentView:dockProgressBar];
>
>
> Use:
>
> [dockProgressBar setDoubleValue:0.0L]; // needed for OS 10.6.1
> Snow Leopard or else progress bar doesn't update beyond first step
> [dockProgressBar setDoubleValue:barValue];
>
> // *** Snap the progress indicator into an image (NSView
> dataWithPDFInsideRect: selector - very useful).
> NSImage *dockProgressBarImage = [[NSImage alloc]
> initWithData:[dockProgressBar dataWithPDFInsideRect:[dockProgressBar frame]]];
>
> // *** Get the app's default icon.
> NSImage *mainIcon = [dockIcon copy];
>
> // *** Lock image ops onto the default icon.
> [mainIcon lockFocus];
>
> // *** composite the progress indicator image onto the dock icon.
> NSPoint point = { 0.0, 0.0 };
> [dockProgressBarImage drawAtPoint:point fromRect:NSZeroRect
> operation:NSCompositeSourceOver fraction:1.0];
> [mainIcon unlockFocus];
>
> // *** Replace the dock icon with the image containing the
> progress bar.
> [NSApp setApplicationIconImage:mainIcon];
> [dockProgressBarImage release];
> [mainIcon release];
>
> lastDockBarValue = barValue;
>
>
> NSPanel subclass:
>
> // This is needed for the progress bars used in the dock icon and the
> floating progress panel, so they are given
> // a dummy window (which never gets displayed) which they think is key, and
> so show the blue colour (grey is less
> // visible hence all this effort)
>
> @implementation MyAlwaysKeyPanel
>
> - (BOOL)isKeyWindow
> {
> return TRUE;
> }
>
> @end
>
>
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