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| public class CircularProgressBar : UserControl
{
private Border _trackBorder;
private Path _progressPath;
public static readonly DependencyProperty ProgressProperty =
DependencyProperty.Register("Progress", typeof(double), typeof(CircularProgressBar),
new PropertyMetadata(0.0, OnProgressChanged));
public static readonly DependencyProperty BackgroundBrushProperty =
DependencyProperty.Register("BackgroundBrush", typeof(Brush), typeof(CircularProgressBar),
new PropertyMetadata(Brushes.Transparent));
public static readonly DependencyProperty TrackBrushProperty =
DependencyProperty.Register("TrackBrush", typeof(Brush), typeof(CircularProgressBar),
new PropertyMetadata(Brushes.LightGray));
public static readonly DependencyProperty ProgressBrushProperty =
DependencyProperty.Register("ProgressBrush", typeof(Brush), typeof(CircularProgressBar),
new PropertyMetadata(Brushes.Blue));
public static readonly DependencyProperty ProgressThicknessProperty =
DependencyProperty.Register("ProgressThickness", typeof(int), typeof(CircularProgressBar), new PropertyMetadata(13));
public static readonly DependencyProperty TrackThicknessProperty =
DependencyProperty.Register("TrackThickness", typeof(int), typeof(CircularProgressBar), new PropertyMetadata(5));
public double Progress
{
get => (double)GetValue(ProgressProperty);
set => SetValue(ProgressProperty, value);
}
public Brush BackgroundBrush
{
get => (Brush)GetValue(BackgroundBrushProperty);
set => SetValue(BackgroundBrushProperty, value);
}
public Brush TrackBrush
{
get => (Brush)GetValue(TrackBrushProperty);
set => SetValue(TrackBrushProperty, value);
}
public Brush ProgressBrush
{
get => (Brush)GetValue(ProgressBrushProperty);
set => SetValue(ProgressBrushProperty, value);
}
public int TrackThickness
{
get => (int)GetValue(TrackThicknessProperty);
set => SetValue(TrackThicknessProperty, value);
}
public int ProgressThickness
{
get => (int)GetValue(ProgressThicknessProperty);
set => SetValue(ProgressThicknessProperty, value);
}
public CircularProgressBar()
{
CreateVisualTree();
SizeChanged += OnSizeChanged;
}
private void CreateVisualTree()
{
var grid = new Grid();
_trackBorder = new Border
{
BorderThickness = new Thickness(5),
CornerRadius = new CornerRadius(0)
};
_trackBorder.SetBinding(Border.BackgroundProperty, new Binding("BackgroundBrush") { Source = this });
_trackBorder.SetBinding(Border.BorderBrushProperty, new Binding("TrackBrush") { Source = this });
_trackBorder.SetBinding(Border.BorderThicknessProperty, new Binding("TrackThickness") { Source = this });
_progressPath = new Path
{
StrokeThickness = 13,
StrokeStartLineCap = PenLineCap.Round,
StrokeEndLineCap = PenLineCap.Round
};
_progressPath.SetBinding(Shape.StrokeProperty, new Binding("ProgressBrush") { Source = this });
_progressPath.SetBinding(Shape.StrokeThicknessProperty, new Binding("ProgressThickness") { Source = this });
grid.Children.Add(_trackBorder);
grid.Children.Add(_progressPath);
Content = grid;
}
private void UpdateProgress()
{
if (ActualWidth <= 0 || ActualHeight <= 0) return;
double availableSize = Math.Min(ActualWidth - ProgressThickness, ActualHeight - ProgressThickness);
double trackRadius = availableSize / 2;
_trackBorder.Width = availableSize;
_trackBorder.Height = availableSize;
_trackBorder.CornerRadius = new CornerRadius(trackRadius);
double progressRadius = trackRadius - TrackThickness / 2;
double angle = Math.Min(360 * Progress / 100, 359.99);
Point center = new Point(ActualWidth / 2, ActualHeight / 2);
Point startPoint = new Point(center.X, center.Y - progressRadius);
var geometry = new PathGeometry();
var figure = new PathFigure { StartPoint = startPoint, IsClosed = false };
var arc = new ArcSegment
{
Size = new Size(progressRadius, progressRadius),
SweepDirection = SweepDirection.Clockwise,
IsLargeArc = angle > 180,
Point = CalculatePoint(center, progressRadius, angle)
};
figure.Segments.Add(arc);
geometry.Figures.Add(figure);
_progressPath.Data = geometry;
}
private Point CalculatePoint(Point center, double radius, double angle)
{
double radians = angle * Math.PI / 180;
return new Point(
center.X + radius * Math.Sin(radians),
center.Y - radius * Math.Cos(radians));
}
private void OnSizeChanged(object sender, SizeChangedEventArgs e)
{
UpdateProgress();
}
private static void OnProgressChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
{
((CircularProgressBar)d).UpdateProgress();
}
}
|
