C# CGContext.StrokeRect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));
	}	

	public override void DrawInContext (CGContext context)
	{
		var imageRect = new RectangleF (8, 8, 64, 64);
		
		// Note: The images are actually drawn upside down because Quartz image drawing expects
		// the coordinate system to have the origin in the lower-left corner, but a UIView
		// puts the origin in the upper-left corner. For the sake of brevity (and because
		// it likely would go unnoticed for the image used) this is not addressed here.
		// For the demonstration of PDF drawing however, it is addressed, as it would definately
		// be noticed, and one method of addressing it is shown there.
	
		// Draw the image in the upper left corner (0,0) with size 64x64
		context.DrawImage (imageRect, image);
		
		// Tile the same image across the bottom of the view
		// CGContextDrawTiledImage() will fill the entire clipping area with the image, so to avoid
		// filling the entire view, we'll clip the view to the rect below. This rect extends
		// past the region of the view, but since the view's rectangle has already been applied as a clip
		// to our drawing area, it will be intersected with this rect to form the final clipping area
		context.ClipToRect(new RectangleF (0, 80, Bounds.Width, Bounds.Height));
		
		// The origin of the image rect works similarly to the phase parameter for SetLineDash and
		// SetPatternPhase and specifies where in the coordinate system the "first" image is drawn.
		// The size (previously set to 64x64) specifies the size the image is scaled to before being tiled.
		imageRect.X = 32;
		imageRect.Y = 112;
		context.DrawTiledImage (imageRect, image);
		
		// Highlight the "first" image from the DrawTiledImage call.
		context.SetRGBFillColor (1, 0, 0, 0.5f);
		context.FillRect (imageRect);
		
		// And stroke the clipped area
		context.SetLineWidth (3);
		context.SetRGBStrokeColor (1, 0, 0, 1);
		context.StrokeRect (context.GetClipBoundingBox ());
	}

		public override void DrawInContext (CGContext context)
		{
			base.DrawInContext (context);
			nfloat size = NMath.Min (Bounds.Size.Width, Bounds.Size.Height);

			CGAffineTransform transform = AffineTransform;

			nfloat xTranslate = 0;
			nfloat yTranslate = 0;

			if (Bounds.Size.Width < Bounds.Size.Height)
				yTranslate = (Bounds.Size.Height - size) / 2f;
			else
				xTranslate = (Bounds.Size.Width - size) / 2f;

			transform.Translate (xTranslate, yTranslate);

			nfloat strokeWidth = StrokeFactor * size;
			nfloat checkBoxInset = InsetFactor * size;

			// Create the outer border for the check box.
			nfloat outerDimension = size - 2 * checkBoxInset;
			var checkBoxRect = new CGRect(checkBoxInset, checkBoxInset, outerDimension, outerDimension);
			checkBoxRect = transform.TransformRect (checkBoxRect);

			// Make the desired width of the outer box.
			context.SetLineWidth (strokeWidth);

			// Set the tint color of the outer box.
			context.SetStrokeColor (TintColor);

			// Draw the outer box.
			context.StrokeRect (checkBoxRect);

			// Draw the inner box if it's checked.
			if (Checked) {
				nfloat markInset = MarkInsetFactor * size;

				nfloat markDimension = size - 2 * markInset;
				var markRect = new CGRect(markInset, markInset, markDimension, markDimension);
				markRect = transform.TransformRect (markRect);

				context.SetFillColor (TintColor);
				context.FillRect (markRect);
			}
		}

        private void DrawRectangle(CGContext g, PinboardData.RectangleInfo rectInfo)
        {
            g.SetFillColor(rectInfo.Color);
            g.FillRect(rectInfo.Rectangle);

            float pw = 0.5f;
            CGColor rectBorderColor = new CGColor(0f, rectInfo.Color.Alpha);

            g.SetLineWidth(pw);
            g.SetStrokeColor(rectBorderColor);
            g.SetFillColor(rectInfo.Color);
            g.SetLineJoin(CGLineJoin.Miter);
            g.BeginPath();
            g.StrokeRect(rectInfo.Rectangle);

            int margin = 5;
            // TODO: Make the font configurable
            NSFont font = NSFont.FromFontName("Helvetica", 12f);
            NSObject[] objects = new NSObject[] { font, (NSNumber)0 };
            NSObject[] keys = new NSObject[] { NSAttributedString.FontAttributeName, NSAttributedString.LigatureAttributeName };
            NSDictionary attributes = NSDictionary.FromObjectsAndKeys(objects, keys);
            NSAttributedString attrString = new NSAttributedString(rectInfo.Name, attributes);

            attrString.DrawString(new RectangleF(rectInfo.X + margin, rectInfo.Y + margin, rectInfo.Width - 2 * margin, rectInfo.Height - 2 * margin));
        }

        /**
         * This is fill of hackish stuff.
         * Thought this was going to be easier but that just did not work out.
         **/
        protected void HatchSphere(CGContext context)
        {
            var hatchSize = getHatchWidth (hatchStyle);
            var lineWidth = getLineWidth (hatchStyle);

            initializeContext(context, hatchSize, false);

            /* draw background in fore ground color*/
            drawBackground (context, backColor, hatchSize, hatchSize);

            context.SetStrokeColor(foreColor.ToCGColor());
            context.SetFillColor(foreColor.ToCGColor());

            context.SetLineWidth(1);
            context.SetLineCap(CGLineCap.Square);

            // Initialize work rectangle
            CGRect rect = new CGRect (0,0,1,1);

            float quad = hatchSize / 2.0f;

            // Left lower quad
            rect.Width = quad;
            rect.Height = quad;
            rect.X = 0;
            rect.Y = 0;

            context.StrokeRect(rect);

            // right upper quad
            rect.Width = quad;
            rect.Height = quad;
            rect.X = quad;
            rect.Y = quad;

            context.StrokeRect(rect);

            // left upper quad
            rect.Width = quad;
            rect.Height = quad;
            rect.X = 0;
            rect.Y = quad + 1;

            context.FillRect(rect);

            // right lower quod
            rect.Width = quad;
            rect.Height = quad;
            rect.X = quad + 1;
            rect.Y = 0;

            context.FillRect(rect);

            // Now we fill in some corner bits with background
            // This is a bad hack but now sure what else to do
            context.SetFillColor(backColor.ToCGColor());

            rect.Height = 1;
            rect.Width = 1;

            rect.X = 0;
            rect.Y = 0;
            setPixels (context, rect);

            rect.X = 0;
            rect.Y = quad;
            setPixels(context, rect);

            rect.X = 0;
            rect.Y = quad;
            setPixels(context, rect);

            rect.X = quad;
            rect.Y = 0;
            setPixels(context, rect);

            rect.X = quad;
            rect.Y = quad;
            setPixels(context, rect);

            rect.X = quad;
            rect.Y = hatchSize;
            setPixels(context, rect);

            rect.X = hatchSize;
            rect.Y = 0;
            setPixels(context, rect);

            rect.X = hatchSize;
            rect.Y = quad;
            setPixels(context, rect);

            rect.X = hatchSize;
            rect.Y = hatchSize;
            setPixels(context, rect);

//.........这里部分代码省略.........

        void HatchHorizontalBrick(CGContext context)
        {
            var hatchWidth = getHatchWidth (hatchStyle);
            var hatchHeight = getHatchHeight (hatchStyle);
            var lineWidth = getLineWidth (hatchStyle);

            initializeContext(context, hatchHeight, false);

            /* draw background */
            drawBackground (context, backColor, hatchWidth, hatchHeight);

            /* draw lines in the foreground color */
            context.SetFillColor(foreColor.ToCGColor());

            /* draw lines in the foreground color */
            context.SetStrokeColor(foreColor.ToCGColor());
            context.SetLineWidth(lineWidth);
            context.SetLineCap(CGLineCap.Square);

            CGRect rect = new CGRect (0,0,1,1);

            rect.Y = 3;
            rect.Width = hatchWidth;
            rect.Height = hatchHeight - 4;
            context.StrokeRect(rect);

            context.MoveTo(hatchWidth / 2.0f, 0);
            context.AddLineToPoint(hatchWidth / 2.0f,3);
            context.StrokePath();
        }

		private static void DrawRectangle(CGContext currentContext, CGRect destination, Color outlineColor)
		{
			currentContext.SetStrokeColor (outlineColor.R, outlineColor.G, outlineColor.B, outlineColor.A);
			currentContext.SetLineWidth ((nfloat)4f);
			currentContext.StrokeRect ((CGRect)destination);
		}