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| using System;
using System.Collections.Generic;
using System.Text;
int min = 0;
int max = 100;
int val = 0;
Color BarColor = Color.Blue;
protected override void OnResize(EventArgs e)
{
this.Invalidate();
}
protected override void OnPaint(PaintEventArgs e)
{
Graphics g = e.Graphics;
SolidBrush brush = new SolidBrush(BarColor);
float percent = (float)(val - min) / (float)(max - min);
Rectangle rect = this.ClientRectangle;
rect.Width = (int)((float)rect.Width * percent);
g.FillRectangle(brush, rect);
Draw3DBorder(g);
brush.Dispose();
g.Dispose();
}
public int Minimum
{
get
{
return min;
}
set
{
if (value < 0)
{
min = 0;
}
than the maximum value.
if (value > max)
{
min = value;
min = value;
}
if (val < min)
{
val = min;
}
this.Invalidate();
}
}
public int Maximum
{
get
{
return max;
}
set
{
than the minimum value.
if (value < min)
{
min = value;
}
max = value;
if (val > max)
{
val = max;
}
this.Invalidate();
}
}
public int Value
{
get
{
return val;
}
set
{
int oldValue = val;
if (value < min)
{
val = min;
}
else if (value > max)
{
val = max;
}
else
{
val = value;
}
float percent;
Rectangle newValueRect = this.ClientRectangle;
Rectangle oldValueRect = this.ClientRectangle;
percent = (float)(val - min) / (float)(max - min);
newValueRect.Width = (int)((float)newValueRect.Width * percent);
percent = (float)(oldValue - min) / (float)(max - min);
oldValueRect.Width = (int)((float)oldValueRect.Width * percent);
Rectangle updateRect = new Rectangle();
if (newValueRect.Width > oldValueRect.Width)
{
updateRect.X = oldValueRect.Size.Width;
updateRect.Width = newValueRect.Width - oldValueRect.Width;
}
else
{
updateRect.X = newValueRect.Size.Width;
updateRect.Width = oldValueRect.Width - newValueRect.Width;
}
updateRect.Height = this.Height;
// Invalidate the intersection region only.
this.Invalidate(updateRect);
}
}
public Color ProgressBarColor
{
get
{
return BarColor;
}
set
{
BarColor = value;
this.Invalidate();
}
}
private void Draw3DBorder(Graphics g)
{
int PenWidth = (int)Pens.White.Width;
g.DrawLine(Pens.DarkGray,
new Point(this.ClientRectangle.Left, this.ClientRectangle.Top),
new Point(this.ClientRectangle.Width - PenWidth, this.ClientRectangle.Top));
g.DrawLine(Pens.DarkGray,
new Point(this.ClientRectangle.Left, this.ClientRectangle.Top),
new Point(this.ClientRectangle.Left, this.ClientRectangle.Height - PenWidth));
g.DrawLine(Pens.White,
new Point(this.ClientRectangle.Left, this.ClientRectangle.Height - PenWidth),
new Point(this.ClientRectangle.Width - PenWidth, this.ClientRectangle.Height - PenWidth));
g.DrawLine(Pens.White,
new Point(this.ClientRectangle.Width - PenWidth, this.ClientRectangle.Top),
new Point(this.ClientRectangle.Width - PenWidth, this.ClientRectangle.Height - PenWidth));
} |
