On Feb 26, 2008, at 10:21 PM, Seth Willits wrote:
On Feb 26, 2008, at 3:13 PM, John Stiles wrote:
Trying to simulate the drawing behavior of NSCell seems error-prone
to me. Since I don't have access to the original code, it would be
hard to match its behavior. I'd much rather inherit as much as I
can and only customize around the edges.
You're not replicating a whole lot here, however. If you're already
setting the multi-colored text color in willDisplayCell: for every
cell, then the minimal amount of work you need should be to call
setTextColor before calling the super class's implementation of
drawInteriorWithFrame if the cell is highlighted and active.
- (void)drawInteriorWithFrame:(NSRect)cellFrame inView:(NSView
*)controlView;
{
BOOL isWindowActive = [[[self controlView] window] isKeyWindow] &&
[[NSApplication sharedApplication] isActive];
BOOL isControlActive = isWindowActive && ([[[self controlView]
window] firstResponder] == [self controlView]);
if (isControlActive && [self isHighlighted]) {
[self setTextColor:[NSColor whiteColor]];
}
[super drawInteriorWithFrame:cellFrame inView:controlView];
}
I should mention a few things about this snippet of code. Under
leopard, the "isKeyWindow/isActive" stuff isn't required; you can just
use something like this:
BOOL isControlActive = [self interiorBackgroundStyle] ==
NSBackgroundStyleLight;
...
This will be correct in more places than the above example (which
would be wrong for edited text).
Also, if you call setTextColor for one case, you should call
setTextColor for the other 'else' clause too. Otherwise, any drawings
with the same cell will use the last color set (white), unless your
willDisplayCell resets it.
corbin
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