CodeProject: XP like colour progress bar. Free source code and programming help

Sample Image

Introduction

This is a simple progress bar control that imitates the XP visual style. The control inherits Windows.Forms.Control and the reason to add another progress bar here is that there was no XP style progress bar with the ability to change its colour. I needed a red coloured progress bar to indicate error but the normal XP progress bar does not allow colour change. Also, I needed that nice XP style because my program was using the XP visual styles. The bars are drawn just like the XP progress bar. The whole bars are drawn, not parts from them, depending on the value.

Background

For the progress bar, I used the very nice progress bar control developed by Alan Zhao. Basically, the main functionality is provided by him, I improved the painting of the control to make it XP like.

Control Properties

BarColor
The primary color of ColorProgressBar.
BorderColor
The border color of ColorProgressBar.
FillStyle
Bar styles, "Solid" or "Dashed".
Maximum
The maximum value of ColorProgressBar.
Minimum
The minimum value or the initial value of ColorProgressBar.
Value
The current value of ColorProgressBar.
Step
The value of each increment or decrement when you call methods PerformStep() and PerformStepBack().

Control Methods

PerformStep()
Call the PerformStep() method to increase the value set in the Step property.
PerformStepBack()
Call the PerformStepBack() method to decrease the value set in the Step property.
Increment(int value)
Call the Increment() method to increase the integer value you specify.
Decrement(int value)
Call the Decrement() method to decrease the integer value you specify.

Painting code

// The region of the progress bar!

int leftbar = 1;
int topbar = 1;
int X = this.Width-1;
int Y = this.Height-1;
Point[] points = {   new Point(leftbar + 2, topbar), 
         new Point(X-2, topbar), 
         new Point(X-1, topbar + 1), 
         new Point(X, topbar + 2), 
         new Point(X, Y-3), 
         new Point(X-1, Y-2), 
         new Point(X-2, Y-1), 
         new Point(leftbar + 2, Y), 
         new Point(leftbar + 1, Y-2), 
         new Point(leftbar, Y-3), 
         new Point(leftbar, topbar + 2),
         new Point(leftbar + 1, topbar + 1),
        };    
GraphicsPath path = new GraphicsPath();
path.AddLines(points);
Region reg = new Region(path);
e.Graphics.FillRegion(Brushes.White, reg);