C# CGContext.StrokeRectWithWidth方法代码示例

	public override void DrawInContext (CGContext context)
	{
		// Drawing with a white stroke color
		context.SetRGBStrokeColor (1, 1, 1, 1);
		// And drawing with a blue fill color
		context.SetRGBFillColor (0, 0, 1, 1);
		// Draw them with a 2 stroke width so they are a bit more visible.
		context.SetLineWidth (2);
		
		// Add Rect to the current path, then stroke it
		context.AddRect (new RectangleF (30, 30, 60, 60));
		context.StrokePath ();
		
		// Stroke Rect convenience that is equivalent to above
		context.StrokeRect (new RectangleF (30, 120, 60, 60));
		
		// Stroke rect convenience equivalent to the above, plus a call to context.SetLineWidth ().
		context.StrokeRectWithWidth (new RectangleF (30, 210, 60, 60), 10);
		// Demonstate the stroke is on both sides of the path.
		context.SaveState ();
		context.SetRGBStrokeColor (1, 0, 0, 1);
		context.StrokeRectWithWidth (new RectangleF (30, 210, 60, 60), 2);
		context.RestoreState ();
		
		var rects = new RectangleF []
		{
			new RectangleF (120, 30, 60, 60),
			new RectangleF (120, 120, 60, 60),
			new RectangleF (120, 210, 60, 60),
		};
		// Bulk call to add rects to the current path.
		context.AddRects (rects);
		context.StrokePath ();
		
		// Create filled rectangles via two different paths.
		// Add/Fill path
		context.AddRect (new RectangleF (210, 30, 60, 60));
		context.FillPath ();
		// Fill convienience.
		context.FillRect (new RectangleF (210, 120, 60, 60));
	}	

        private void DrawSelected(CGContext g)
        {
            if (selectionRect.IsEmpty)
                return;

            CGImage grabberImage;
            var targetRect = new CGRect(CGPoint.Empty, grabberSize);

            grabberImage = NSImage.ImageNamed("Grabber").AsCGImage(ref targetRect, NSGraphicsContext.CurrentContext, new NSDictionary());

            g.SetStrokeColor(new CGColor(0.5f, 0.5f));
            g.StrokeRectWithWidth(selectionRect, 0.5f);

            for (int i = 0; i < grabberRects.Length; i++)
            {
                g.DrawImage(grabberRects[i], grabberImage);
            }
        }

    public override void DrawInContext(CGContext context)
    {
        // Draw the colored pattern. Since we have a CGColorRef for this pattern, we just set
        // that color current and draw.
        context.SetFillColorWithColor(coloredPatternColor);
        context.FillRect(new RectangleF(10, 10, 90, 90));

        // You can also stroke with a pattern.
        context.SetStrokeColorWithColor(coloredPatternColor);
        context.StrokeRectWithWidth(new RectangleF(120, 10, 90, 90), 8);

        // Since we aren't encapsulating our pattern in a CGColor for the uncolored pattern case, setup requires two steps.
        // First you have to set the context's current colorspace (fill or stroke) to a pattern colorspace,
        // indicating to Quartz that you want to draw a pattern.
        context.SetFillColorSpace(uncoloredPatternColorSpace);

        // Next you set the pattern and the color that you want the pattern to draw with.
        var color1 = new float [] {1, 0, 0, 1};
        context.SetFillPattern(uncoloredPattern, color1);
        // And finally you draw!
        context.FillRect(new RectangleF(10, 120, 90, 90));

        // As long as the current colorspace is a pattern colorspace, you are free to change the pattern or pattern color
        var color2 = new float [] {0, 1, 0, 1};
        context.SetFillPattern(uncoloredPattern, color2);
        context.FillRect(new RectangleF(10, 230, 90, 90));

        // And of course, just like the colored case, you can stroke with a pattern as well.
        context.SetStrokeColorSpace(uncoloredPatternColorSpace);
        context.SetStrokePattern(uncoloredPattern, color1);
        context.StrokeRectWithWidth(new RectangleF(120, 120, 90, 90), 8);
        // As long as the current colorspace is a pattern colorspace, you are free to change the pattern or pattern color
        context.SetStrokePattern(uncoloredPattern, color2);
        context.StrokeRectWithWidth(new RectangleF(120, 230, 90, 90), 8);
    }