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POShapes doesn't show on panel in winform
 

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  1. POShapes doesn't show on panel in winform
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    <p>I am drawing a rectangle using <code>CreateGraphics</code> with <code>MouseDrag</code> and on <code>MouseUp</code>, I add a <code>RectangleShape</code> (<code>Microsoft.VisualBasic.PowerPacks</code>). But the shape is not visible. Actually shape is added to <code>ShapeContainer</code>, but not shown. AND when I click on <code>Panel</code>, it shows up.</p> <p>Below is my code to do so.</p> <pre><code> Rectangle rect; Point p; Size s; bool mouseDown; private ShapeContainer shapeContainer1 = new ShapeContainer(); public Form1 () { InitializeComponent(); // This will reduce flicker (Recommended) this.DoubleBuffered = true; this.shapeContainer1.Parent = this.panel1; this.shapeContainer1.Enabled = false; } private void panel1_MouseDown (object sender, MouseEventArgs e) { this.panel1.SendToBack(); s.Height = 0; s.Width = 0; p = this.panel1.PointToClient(System.Windows.Forms.Cursor.Position); rect = new Rectangle(p, s); this.panel1.Invalidate(); mouseDown = true; } private void panel1_MouseMove (object sender, MouseEventArgs e) { if (mouseDown) { this.panel1.SendToBack(); p = this.panel1.PointToClient(System.Windows.Forms.Cursor.Position); rect = new Rectangle(rect.Left, rect.Top, p.X - rect.Left, p.Y - rect.Top); this.panel1.Invalidate(); } } protected override void OnPaint (PaintEventArgs e) { Graphics g = this.panel1.CreateGraphics(); if (mouseDown) { using (Pen pen = new Pen(Color.Red, 2)) { this.panel1.SendToBack(); g.DrawRectangle(pen, rect); } } } private void panel1_MouseUp (object sender, MouseEventArgs e) { this.panel1.SendToBack(); shapeContainer1.Size = this.panel1.Size; shapeContainer1.Location = this.panel1.Location; RectangleShape rectangle = new RectangleShape(); rectangle.Location = rect.Location; rectangle.Size = rect.Size; rectangle.Name = "rectShape"; rectangle.Parent = this.shapeContainer1; rectangle.Visible = true; this.shapeContainer1.Shapes.Add(rectangle); } </code></pre> <p>What is wrong with the code.? Following are some photos that shows the exact problem.</p> <p><img src="https://i.stack.imgur.com/yTbpq.png" alt="enter image description here"></p> <p><img src="https://i.stack.imgur.com/JaQla.png" alt="enter image description here"></p> <p>First photo shows that the rectangle is added to panel. When mouse moved, it disappears. Again when you click on the panel, is appears.</p>
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