BGHUDAppKit BGHUDTabView _drawThemeTab private API override now broken
For years, I have been using code originally based off of BGHUDAppKit, and found replacements for all of the private API that BGHUDAppKit overrides.
Except for one that I could not find a way to replace...
-[NSTabView _drawThemeTab:withState:inRect:]
(Note: I also use venerable PSMTabBarControl in many circumstances, so if all else fails I'll convert all my tab views to PSMTabBarControl)
Apple has now added the dark NSAppearance in 10.14 Mojave (so in ~10 years I can use it once we stop supporting High Sierra).
Whichever selfish dev at Apple writes NSTabView does not believe in making his view customizable, unlike all of the other NSControls which are customizable. Here is part of the hackish overrides for custom drawing of NSTabView:
// until we can eliminate private API _drawThemeTab:, return nil for new NSAppearance
- (id) appearance { return nil; }
- (id) effectiveAppearance { return nil; }
-(void)_drawThemeTab:(id) tabItem withState:(NSUInteger) state inRect:(NSRect) aRect {
NSInteger idx = [self indexOfTabViewItem: tabItem];
int gradientAngle = 90;
NSBezierPath *path = nil;
aRect = NSInsetRect(aRect, 0.5f, 0.5f);
if([self tabViewType] == NSLeftTabsBezelBorder) {
gradientAngle = 0;
} else if([self tabViewType] == NSRightTabsBezelBorder) {
gradientAngle = 180;
}
NSColor *specialFillColor = [tabItem color];
NSColor *outlineColor = nil;
NSString *name = [specialFillColor description];
// MEC - added new prefix 12/15/17 to fix white border around last segment in High Sierra
if ( [name hasPrefix:@"NSNamedColorSpace System"] || [name hasPrefix:@"Catalog color: System controlColor"])
specialFillColor = nil;
else if ( [name isEqualToString: @"NSCalibratedWhiteColorSpace 0 1"] )
[specialFillColor set];
else
{
outlineColor = specialFillColor;
specialFillColor = nil;
}
... etc ...
