///
/// Copyright (c) 2013-2015 Sensus Metering Systems
///
using System;
using System.Drawing;
using System.Windows.Forms;

namespace TBF
{
    public class BarGraph
    {
        int originX;            /// Left coordinate of the bar
        int originY;            /// Top coordinate of the bar
        int barWidth;           /// Bar width, the bar is actualy 1 pixel wider
        int barHeight;          /// Bar height the bat is actualy 1 pixel higher
        Color barColor;         /// Bar color
        Color backColor;        /// Background color (above the bar)
                                /// Bar border is always black, 1 pixel wide
        int barValue;           /// The actual bar size (the bar is drawn from bottom)

        System.Windows.Forms.Control control;
        Rectangle rect;


        /// Use this setter to update the bar size
        public float FValue
        {
            get { return (float)barValue/(float)barHeight; }
            set
            {
                Value = (int)(value * (float)barHeight);
                control.Invalidate();
            }
        }
                        
        /// Use this setter to update the bar size
        public int Value
        {
            get { return barValue; }
            set
            {
                if (value < 0)               barValue = 0;
                else if (value >= barHeight) barValue = barHeight;
                else                         barValue = value;
                control.Invalidate();
            }
        }

        /// <summary>
        /// Constructor
        /// </summary>
        public BarGraph(System.Windows.Forms.Control control, int originX, int originY, int barWidth, int barHeight, Color barColor, Color backColor)
        {
            this.control = control;
            this.originX = originX;
            this.originY = originY;
            this.barWidth = barWidth;
            this.barHeight = barHeight;
            this.barColor = barColor;
            this.backColor = backColor;
            rect = new Rectangle(originX, originY, barWidth + 1, barHeight + 1);
            barValue = 0;
        }

        /// <summary>
        /// Call this function in Form1_Paint(..), pass the arguments without any modifications
        /// </summary>
        public void Paint(Graphics g)
        {
            g.FillRectangle(new SolidBrush(backColor), originX + 1, originY + 1, barWidth, barHeight - barValue);
            g.FillRectangle(new SolidBrush(barColor), originX + 1, originY + barHeight + 1 - barValue, barWidth, barValue);
            g.DrawRectangle(new Pen(Color.Black, 2.0F), originX, originY, barWidth + 1, barHeight + 1);
        }
    }
}