Custom WPF Progress Bar

1. Class Diagram



As you can see from the class diagram the class is inherited from UserControl and I have created three dependency properties and wrappers to access them along with the one general property.

• BackGroundFill is a brush which is used to paint the background (not completed portion) of progress bar.
• ProgressFill is used to paint the completed part of the progress bar.
• Value is an integer used for current progress of the progress bar.
• ToolTipType is an enumerated type allows selecting the displayed tool tip over the completed portion of progress bar. ToolTipType can contain these values listed below.
  
  
  1. None
  2. Valueonly
  3. ValuewithPercentage
  4. ValuewithPercentageComplete

2. Design(XAML Code)

In the XAML code described below I have a user control called Custom Progress Bar. Inside this I have a Viewbox with stretch set as Fill within which I have a grid panel which acts as background for the progress bar. The grid contains a rectangle used to indicate the progress or completed part of the bar. You will also notice background of grid or fill area of rectangle has been assigned to some default linear gradient brush. Based on the value of the progress bar we are going to change the width of the rectangle.



3. Class Definition(C# Code)

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Navigation;
using System.Windows.Shapes;

namespace DebataControls
{
/// <summary>
/// Interaction logic for CustomProgressBar.xaml
/// </summary>
public partial class CustomProgressBar : UserControl
{
public CustomProgressBar()
{
InitializeComponent();
}
public static readonly DependencyProperty ValueProperty =
DependencyProperty.Register("Value",typeof(int), typeof(CustomProgressBar),
new PropertyMetadata(0, new PropertyChangedCallback(
(obj, chng) =>
{
CustomProgressBar current = (CustomProgressBar)obj;
current.pgc.Width = (int)chng.NewValue;
switch (current.ToolTipType)
{
case DisplayToolTip.None:
current.pgc.ToolTip = null;
break;
case DisplayToolTip.Valueonly:
current.pgc.ToolTip = chng.NewValue;
break;
case DisplayToolTip.ValuewithPercentage:
current.pgc.ToolTip = string.Format("{0} %", chng.NewValue);
break;
case DisplayToolTip.ValuewithPercentageComplete:
current.pgc.ToolTip = string.Format("{0} % Complete", chng.NewValue);
break;
default:
break;
}

}
)));
public int Value
{
get { return (int)GetValue(ValueProperty); }
set { SetValue(ValueProperty, value); }
}

public static readonly DependencyProperty ProgressFillProperty =
DependencyProperty.Register("ProgressFill", typeof(Brush)
, typeof(CustomProgressBar), new PropertyMetadata(
new LinearGradientBrush(new GradientStopCollection
{
new GradientStop{ Color = Brushes.Silver.Color , Offset=0}
,new GradientStop{ Color = Brushes.Red.Color , Offset=0.5}
,new GradientStop{ Color = Brushes.DarkRed.Color , Offset=0.75}
}, new Point(0.5, 0), new Point(0.5, 1)),
new PropertyChangedCallback(
(obj, chng) =>
{
CustomProgressBar current = (CustomProgressBar)obj;
current.pgc.Fill = (Brush)chng.NewValue;
}
)));

public Brush ProgressFill
{
get { return (Brush)GetValue(ProgressFillProperty); }
set { SetValue(ProgressFillProperty, Value); }
}

public static readonly DependencyProperty BackGroungFillProperty =
DependencyProperty.Register("BackGroungFill", typeof(Brush),
typeof(CustomProgressBar), new PropertyMetadata(
new LinearGradientBrush(new GradientStopCollection
{
new GradientStop{ Color = Brushes.White.Color , Offset=0}
,new GradientStop{ Color = Brushes.LightPink.Color , Offset=0.5}
,new GradientStop{ Color = Brushes.Pink.Color , Offset=0.75}
}, new Point(0.5, 0), new Point(0.5, 1)),
new PropertyChangedCallback(
(obj, chng) =>
{
CustomProgressBar current = (CustomProgressBar)obj;
current.pggrid.Background = (Brush)chng.NewValue;
}
)));
public Brush BackGroungFill
{
get { return (Brush)GetValue(BackGroungFillProperty); }
set { SetValue(BackGroungFillProperty, Value); }
}

public DisplayToolTip ToolTipType
{
get;
set;
}
public enum DisplayToolTip:byte
{
None,
Valueonly,
ValuewithPercentage,
ValuewithPercentageComplete
}
}
}

Now your custom WPF progress bar is ready. Build the assembly and add a reference in your XAML page to use the control.

Above XAML shows the implementation of three colored progress bar shown at the start of this article.