- （void）highlightSelectionInClipRect：（NSRect）theClipRect 
 { 

 //这个方法要求我们为
绘制hightlight //所有在ClipRect中可见的选定行

 // 1.获取当前可见的行索引范围
 // 2.获取所选行的列表
 // 3.遍历可见行并选择它们的索引
 // 4.绘制我们在该行的rect中的自定义高亮。 

 NSRange aVisibleRowIndexes = [self rowsInRect：theClipRect]; 
 NSIndexSet * aSelectedRowIndexes = [self selectedRowIndexes]; 
 int aRow = aVisibleRowIndexes.location; 
 int anEndRow = aRow + aVisibleRowIndexes.length; 
 NSGradient * gradient; 
 NSColor * pathColor; 

 //如果视图是聚焦的，使用高亮颜色，否则使用离焦高亮颜色
 if（self == [[self window] firstResponder]&& [NSGradient alloc] initWithColorsAndLocations：
 [NSColor colorWithDeviceRed：（float）62] [b] [b] [b] / 255 green：（float）133/255 blue：（float）197/255 alpha：1.0]，0.0，
 [NSColor colorWithDeviceRed：（float）48/255 green： float）152/255 alpha：1.0]，1.0，nil] retain]; // 160 80 

 pathColor = [[NSColor colorWithDeviceRed：（float）48/255 green：（float）95/255 blue：（float）152/255 alpha：1.0] retain]; 
} 
 else 
 {
 gradient = [[[NSGradient alloc] initWithColorsAndLocations：
 [NSColor colorWithDeviceRed：（float）190/255 green： 255 blue：（float）150/255 alpha：1.0]，0.0，
 [NSColor colorWithDeviceRed：（float）150/255 green： ，1.0，nil] retain]; 

 pathColor = [[NSColor colorWithDeviceRed：（float）150/255 green：（float）150/255 blue：（float）150/255 alpha：1.0] retain]; 
} 

 //为可见的选定行绘制突出显示
 for（aRow; aRow< anEndRow; aRow ++）
 {
 if aSelectedRowIndexes containsIndex：aRow]）
 {
 NSRect aRowRect = NSInsetRect（[self rectOfRow：aRow]，1,4）; //首先是水平的，第二个是垂直的
 NSBezierPath * path = [NSBezierPath bezierPathWithRoundedRect：aRowRect xRadius：4.0 yRadius：4.0]; //6.0 
 [path setLineWidth：2]; 
 [pathColor set]; 
 [path stroke]; 

 [gradient drawInBezierPath：path angle：90]; 
} 
} 
} 
 

I am developing a Cocoa application and encountered a problem with highlighting. Standard highlighting color in MAC OS X applications is blue, but it doesn't suit my app, since because of design concepts, I need a green color for highlighting.

I tried to subclass NSTableview and override method

- (void)highlightSelectionInClipRect:(NSRect)clipRect

but it didn' help.

If anyone knows how to fix this problem help me please, I would be very thankful.

Artem

I am using this, and so far works perfectly:

- (void)highlightSelectionInClipRect:(NSRect)theClipRect
{

        // this method is asking us to draw the hightlights for 
        // all of the selected rows that are visible inside theClipRect

        // 1. get the range of row indexes that are currently visible
        // 2. get a list of selected rows
        // 3. iterate over the visible rows and if their index is selected
        // 4. draw our custom highlight in the rect of that row.

    NSRange         aVisibleRowIndexes = [self rowsInRect:theClipRect];
    NSIndexSet *    aSelectedRowIndexes = [self selectedRowIndexes];
    int             aRow = aVisibleRowIndexes.location;
    int             anEndRow = aRow + aVisibleRowIndexes.length;
    NSGradient *    gradient;
    NSColor *       pathColor;

        // if the view is focused, use highlight color, otherwise use the out-of-focus highlight color
    if (self == [[self window] firstResponder] && [[self window] isMainWindow] && [[self window] isKeyWindow])
    {
        gradient = [[[NSGradient alloc] initWithColorsAndLocations:
                     [NSColor colorWithDeviceRed:(float)62/255 green:(float)133/255 blue:(float)197/255 alpha:1.0], 0.0, 
                     [NSColor colorWithDeviceRed:(float)48/255 green:(float)95/255 blue:(float)152/255 alpha:1.0], 1.0, nil] retain]; //160 80

        pathColor = [[NSColor colorWithDeviceRed:(float)48/255 green:(float)95/255 blue:(float)152/255 alpha:1.0] retain];
    }
    else
    {
        gradient = [[[NSGradient alloc] initWithColorsAndLocations:
                     [NSColor colorWithDeviceRed:(float)190/255 green:(float)190/255 blue:(float)190/255 alpha:1.0], 0.0, 
                     [NSColor colorWithDeviceRed:(float)150/255 green:(float)150/255 blue:(float)150/255 alpha:1.0], 1.0, nil] retain];

        pathColor = [[NSColor colorWithDeviceRed:(float)150/255 green:(float)150/255 blue:(float)150/255 alpha:1.0] retain];
    }

        // draw highlight for the visible, selected rows
    for (aRow; aRow < anEndRow; aRow++)
    {
        if([aSelectedRowIndexes containsIndex:aRow])
        {
            NSRect aRowRect = NSInsetRect([self rectOfRow:aRow], 1, 4); //first is horizontal, second is vertical
            NSBezierPath * path = [NSBezierPath bezierPathWithRoundedRect:aRowRect xRadius:4.0 yRadius:4.0]; //6.0
                [path setLineWidth: 2];
                [pathColor set];
                [path stroke];

            [gradient drawInBezierPath:path angle:90];
        }
    }
}