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using System;
using System.Xml.Serialization;
using System.ComponentModel;
using Cairo;
namespace Crow
{
public class AnalogMeter : NumericControl
{
#region CTOR
public AnalogMeter() : base()
{}
public AnalogMeter(double minimum, double maximum, double step)
: base(minimum,maximum,step)
{
}
#endregion
#region GraphicObject Overrides
protected override void onDraw (Context gr)
{
base.onDraw (gr);
Rectangle r = ClientRectangle;
Point m = r.Center;
gr.Save ();
double aUnit = Math.PI*2.0 / (Maximum - Minimum);
gr.Translate (m.X, r.Height *1.1);
gr.Rotate (Value/4.0 * aUnit - Math.PI/4.0);
gr.Translate (-m.X, -m.Y);
gr.LineWidth = 2;
Foreground.SetAsSource (gr);
gr.MoveTo (m.X,0.0);
gr.LineTo (m.X, -m.Y*0.5);
gr.Stroke ();
gr.Restore ();
}
#endregion
}
}
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