NSShadow with a subclass of NSButton

Question

Here is my code:

- (void)drawRect:(NSRect)dirtyRect {
    // Drawing code here.
    // Create the Gradient 
    NSGradient *fillGradient = nil;
    if (mouseIsDown)
        fillGradient = [[NSGradient alloc] initWithStartingColor:[NSColor colorWithCalibratedRed:0.868 green:0.873 blue:0.868 alpha:1.000]  endingColor:[NSColor colorWithCalibratedRed:0.687 green:0.687 blue:0.687 alpha:1.000]];
    else
        fillGradient = [[NSGradient alloc] initWithStartingColor:[NSColor colorWithCalibratedRed:0.687 green:0.687 blue:0.687 alpha:1.000] endingColor:[NSColor colorWithCalibratedRed:0.868 green:0.873 blue:0.868 alpha:1.000]];
    // Add The Text
    NSDictionary *att = nil;

    NSMutableParagraphStyle *style =
    [[NSParagraphStyle defaultParagraphStyle] mutableCopy];
    [style setLineBreakMode:NSLineBreakByWordWrapping];
    [style setAlignment:NSLeftTextAlignment];
    att = [[NSDictionary alloc] initWithObjectsAndKeys:
           style, NSParagraphStyleAttributeName, 
           [NSColor blackColor],
           NSForegroundColorAttributeName, nil];
    [style release];

    // Create the path
    aPath = [[NSBezierPath bezierPath] retain]; 

    [aPath moveToPoint:NSMakePoint(10.0, 0.0)];
    [aPath lineToPoint:NSMakePoint(70.0, 0.0)];
    [aPath lineToPoint:NSMakePoint(70.0, 23.0)];
    [aPath lineToPoint:NSMakePoint(10.0, 23.0)];
    [aPath lineToPoint:NSMakePoint(0.0, 10.0)];

    NSShadow *shadow = [[NSShadow alloc] init];
    [shadow setShadowColor:[NSColor blackColor]];
    [shadow setShadowOffset:NSMakeSize(0, 0)];
    [shadow setShadowBlurRadius:5];
    [shadow set];

    NSRect rect;
    rect.size = [[self title] sizeWithAttributes:att];
    rect.origin.x = floor( NSMidX([self bounds]) - rect.size.width / 2 - 8);
    rect.origin.y = floor( NSMidY([self bounds]) - rect.size.height / 2 - 5);

    [fillGradient drawInBezierPath:aPath angle:90.0];
    [fillGradient release];
    [[self title] drawInRect:rect withAttributes:att];
    [att release];

} The problem is that NSShadow is behind the text, not NSBezierPath, 'aPath', how would I add a shadow to NSBezierPath?

Answer 1

Try wrapping the material filling the NSShadow path and the bezier (e.g., from aPath = [[NSBezierPath bezierPath] retain];to [fillGradient release];) in [NSGraphicsContext saveGraphicsState]and [NSGraphicsContext restoreGraphicsState].

In addition, the shadow can be cut off by the borders of the view (I don’t remember whether this is true or not).

( , , , NSButtonCell, drawWithFrame:inView:/-drawInteriorWithFrame:inView: +cellClass ( IB -initWithCoder:). , , , .)