ZoomPanControl

A user control written in c# for Windows Forms .NET environment, which supports zooming and panning.

How to use?

You can copy ZoomControl.cs to your project and start using the User Control right away! The following examples shows a quick demonstration on its use.

var Points = new List<PointF>() {
        new PointF(10, 10),
        new PointF(10, 80),
        new PointF(100, 40),
        new PointF(10, 10),
    };

    // Define handler painting
    zoomControl1.OnDraw += ZoomControl1_OnDraw;
    
    // Optional
    zoomControl1.MinZoom = 0.1f;
    zoomControl1.MaxZoom = 20f;
    zoomControl1.ZoomSensitivity = 0.2f;
    
    // Repaint control
    zoomControl1.Invalidate();
}

// Specify what to draw here using Graphics object
private void ZoomControl1_OnDraw(object sender, ZoomControl.DrawEventArgs e)
{
    var graphics = e.Graphics;
    var pen = new Pen(Color.Black);
    graphics.DrawLines(pen, Points.ToArray());
}

Control Keys

• To zoom you must press ctrl + spin mouse wheel.
• Pan hold shift + press mouse left button and drag the mouse.
• To reset to the origin state press mouse button twice.

License

Feel free to anything with this code.