root/trunk/Views/JVSideOutlineView.m

#import "JVSideOutlineView.h"

static void gradientInterpolate( void *info, float const *inData, float *outData ) {
        static float light[4] = { 0.67843137, 0.73333333, 0.81568627, 1. };
        static float dark[4] = { 0.59607843, 0.66666667, 0.76862745, 1. };
        float a = inData[0];
        int i = 0;

        for( i = 0; i < 4; i++ )
                outData[i] = ( 1. - a ) * dark[i] + a * light[i];
}

@interface NSOutlineView (NSOutlineViewPrivate)
- (NSColor *) _highlightColorForCell:(NSCell *) cell;
- (void) _highlightRow:(int) row clipRect:(NSRect) clip;
@end

@implementation JVSideOutlineView
- (NSColor *) _highlightColorForCell:(NSCell *) cell {
        if( floor( NSAppKitVersionNumber ) > NSAppKitVersionNumber10_4 && [super respondsToSelector:_cmd] )
                return [super _highlightColorForCell:cell];

    // return nil to prevent normal selection drawing
    return nil;
}

- (void) _highlightRow:(int) row clipRect:(NSRect) clip {
        if( floor( NSAppKitVersionNumber ) > NSAppKitVersionNumber10_4 && [super respondsToSelector:_cmd] )
                return [super _highlightRow:row clipRect:clip];

        NSRect highlight = [self rectOfRow:row];

        struct CGFunctionCallbacks callbacks = { 0, gradientInterpolate, NULL };
        CGFunctionRef function = CGFunctionCreate( NULL, 1, NULL, 4, NULL, &callbacks );
        CGColorSpaceRef cspace = CGColorSpaceCreateDeviceRGB();

        CGShadingRef shading = CGShadingCreateAxial( cspace, CGPointMake( NSMinX( highlight ), NSMaxY( highlight ) ), CGPointMake( NSMinX( highlight ), NSMinY( highlight ) ), function, false, false );
        CGContextDrawShading( [[NSGraphicsContext currentContext] graphicsPort], shading );

        CGShadingRelease( shading );
        CGColorSpaceRelease( cspace );
        CGFunctionRelease( function );

        static NSColor *rowBottomLine = nil;
        if( ! rowBottomLine )
                rowBottomLine = [[NSColor colorWithCalibratedRed:( 140. / 255. ) green:( 152. / 255. ) blue:( 176. / 255. ) alpha:1.] retain];

        [rowBottomLine set];

        NSRect bottomLine = NSMakeRect( NSMinX( highlight ), NSMaxY( highlight ) - 1., NSWidth( highlight ), 1. );
        NSRectFill( bottomLine );
}

- (void) drawBackgroundInClipRect:(NSRect) clipRect {
        if( floor( NSAppKitVersionNumber ) > NSAppKitVersionNumber10_4 && [super respondsToSelector:_cmd] )
                return [super drawBackgroundInClipRect:clipRect];

        static NSColor *backgroundColor = nil;
        if( ! backgroundColor )
                backgroundColor = [[NSColor colorWithCalibratedRed:( 229. / 255. ) green:( 237. / 255. ) blue:( 247. / 255. ) alpha:1.] retain];

        [backgroundColor set];
        NSRectFill( clipRect );
}
@end