TextfieldCell in Transparent Tableview, shows background app during editing

Question

Hi,
With reference to the RoundTransparentWindow code of Apple Examples, I tried to make my tableview also transparent from the following code.
- (void)setColumnHeaderOf:(id)identifier image:(NSImage*)image title:(NSString*)title
NSTableColumn *column=[self tableColumnWithIdentifier:identifier];
[[column headerCell] setCellAttribute:NSCellHasImageOnLeftOrBottom to:NSImageBelow];
[[column headerCell] setImage:image];
NSMutableAttributedString *attributedString = [[NSMutableAttributedString alloc] initWithString:title];
NSMutableParagraphStyle * aParagraphStyle = [[[NSMutableParagraphStyle alloc] init] autorelease];
[aParagraphStyle setLineBreakMode:NSLineBreakByTruncatingTail];
[aParagraphStyle setAlignment:NSCenterTextAlignment];
CGFloat dividingFactor = 255.0f;
NSMutableDictionary * aTitleAttributes = [[[NSMutableDictionary alloc] initWithObjectsAndKeys:
[NSFontfontWithName:CPFONTNAME size:[NSFont systemFontSize]], NSFontAttributeName,
aParagraphStyle,NSParagraphStyleAttributeName,
nil] autorelease];
[aTitleAttributes setValue:[NSColor colorWithDeviceRed:(246/dividingFactor) green:(204/dividingFactor)blue:(37/dividingFactor) alpha:1.0f] forKey:NSForegroundColorAttributeName];
[attributedString addAttributes:aTitleAttributes range:NSMakeRange(0, [attributedString length])];
[[column headerCell] setAttributedStringValue:attributedString];
[attributedString release];
- (void)awakeFromNib
NSLog(@"KBCustomTableView awakeFromNib");
[[self enclosingScrollView] setDrawsBackground:NO];
NSRect frameRect = [[self headerView] frame];
[[self headerView] setFrameSize:NSMakeSize(frameRect.size.width, 30)];
[self setColumnHeaderOf:@"Column1" image:[NSImage imageNamed:@"ColHdr1"] title:@"Column1"];
[self setColumnHeaderOf:@"Column2" image:[NSImage imageNamed:@"ColHdr2"] title:@"Column2"];
[self setColumnHeaderOf:@"Column3" image:[NSImage imageNamed:@"ColHdr3"] title:@"Column3"];
- (void)drawBackgroundInClipRect:(NSRect)clipRect
NSLog(@"KBCustomTableView drawBackgroundInClipRect");
//[super drawBackgroundInClipRect:clipRect];
- (id)_highlightColorForCell:(NSCell *)cell
[self setBackgroundColor:[NSColor clearColor]];
return nil;
It works fine but with one strange behaviour of textfieldCell.
WhileEditing the textfieldCell, my background app is shown clearly. This is because in the method, _highlightColorForCell self setBackgroundColor:[NSColor clearColor]]; If I don't do this, then my table behaves very much weird with lot of colors.
Any idea how to resolve this.
Regards
symadept

Answer 1

Hi again
You can control the anti-aliasing on a global scale via Edit > Preferences.
Slide color is controlled either at the slide level itself (examine Slide Properties) and you can also set a default color in Preferences so that if you click Insert > Blank Slide it has a defined color.
It's common for folks to use the hot pink color as a transparent color. I just figured that you were configuring that color in the bitmap image you were creating for the caption. If you haven't done this, I'm unsure where the color may be coming from. Are you using a Bitmap Image in BMP format for the Caption? If not, perhaps you are using PNG or something like that and Captivate may be interpreting a transparent color set in the PNG. Not sure.
Cheers... Rick
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