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POProgramatically draw rectangles with MonoTouch
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  1. POProgramatically draw rectangles with MonoTouch
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    copied!<p>I am trying to learn more about MonoTouch and so I tried out drawing with Quartz2D. I want to create an example, where I draw n-rectangles programmatically. The problem is that only the first one is drawn. I think that the second one is deleted/cleared/covered by the first one.</p> <p>Here is my code:</p> <p>SingleViewMTViewController.cs</p> <pre><code>public override void ViewDidLoad () { base.ViewDidLoad (); PointF locationOne = new PointF (5, 5); PointF locationTwo = new PointF (5, 100); SizeF size = new SizeF (120, 40); DraggableRectangle tView = new DraggableRectangle (locationOne, size, UIColor.Yellow); DraggableRectangle tView2 = new DraggableRectangle (locationTwo, size, UIColor.Brown); DraggableRectangle[] views = new DraggableRectangle[2]; views [0] = tView; views [1] = tView2; View.AddSubviews (views); } </code></pre> <p>DraggableRectangle.cs</p> <pre><code>public class DraggableRectangle : UIView { private CGPath path; private PointF _targetLocation; private SizeF _size; private UIColor _fillColor = UIColor.Brown; public DraggableRectangle (PointF targetLocation, SizeF size) { _targetLocation = targetLocation; _size = size; RectangleF frameRect = new RectangleF (_targetLocation.X, _targetLocation.Y, _size.Width, _size.Height); this.Frame = frameRect; this.BackgroundColor = UIColor.Clear; //without this, nothing is drawn } public DraggableRectangle (PointF targetLocation, SizeF size, UIColor fillColor):this(targetLocation,size) { _fillColor = fillColor; } public override void Draw (RectangleF rect) { //base.Draw (rect); //works without base-call? //get graphics context using (CGContext gctx = UIGraphics.GetCurrentContext ()) { //set up drawing attributes _fillColor.SetFill (); //create geometry path = new CGPath (); path.AddRect (new RectangleF (_targetLocation.X, _targetLocation.Y, _size.Width, _size.Height)); path.CloseSubpath (); //add geometry to graphics context and draw it gctx.AddPath (path); gctx.DrawPath (CGPathDrawingMode.FillStroke); } } </code></pre> <p>Is there a better way to draw independent rectangles with MonoTouch? Or could please someone explain, what I am doing wrong?</p> <p>Thanks in advance!</p> <p><strong>UPDATE:</strong> Thats btw. the best output I can achieve, but thats just not correct for "Yellow" and "Brown" <a href="http://www.bilder-upload.eu/show.php?file=81bfea-1329755225.png" rel="nofollow noreferrer">http://www.bilder-upload.eu/show.php?file=81bfea-1329755225.png</a> <a href="http://www.bilder-upload.eu/show.php?file=81bfea-1329755225.png" rel="nofollow noreferrer">http://www.bilder-upload.eu/show.php?file=81bfea-1329755225.png</a></p>
 

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