NSTextFieldCell或只有NSCell与垂直文本(和彩色着色)

我努力寻找一种以垂直方式显示表视图的列标题的优雅方式(从传统逆时针旋转90度)。 我并没有把这个做成一个真正的NSTableHeaderCell,我想通过重写NSTextFieldCell或NSCell可能会更容易。

单元格只包含不可编辑的文本,但通常是两行,并且根据上下文有时会与列的其余部分一起着色。

我似乎无法找到任何这样做的可可应用程序,更不用说开源示例。 有什么想法吗?


#import "VerticalTextCell.h"

@implementation VerticalTextCell

- (void)drawInteriorWithFrame:(NSRect)cellFrame inView:(NSView *)controlView {

    NSMutableDictionary *atr = [NSMutableDictionary dictionary];
    NSFont *font = [NSFont fontWithName:@"Lucida Grande" size:12];
    [atr setObject:font forKey:NSFontAttributeName];

    [[[self backgroundColor] colorWithAlphaComponent:0.7] set];
    NSRectFillUsingOperation(cellFrame, NSCompositeSourceOver);

    NSGraphicsContext *currentContext = [NSGraphicsContext currentContext];
    [currentContext saveGraphicsState];

    NSAffineTransform *transform = [NSAffineTransform transform];
    [transform translateXBy:NSMinX(cellFrame) yBy:NSMinY(cellFrame)];
    [transform rotateByDegrees:-90];
    [transform concat];

    // vertical inset 5 pixels
    [[self stringValue] drawInRect:NSMakeRect(-NSHeight(cellFrame),5,NSHeight(cellFrame),NSWidth(cellFrame)) withAttributes:atr]; 

    [currentContext restoreGraphicsState];

}


@end
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