/// <summary>
/// Constructs pie pieces and adds them to the visual tree for this control's canvas
/// </summary>
private void ConstructPiePieces()
{
CollectionView myCollectionView = (CollectionView)CollectionViewSource.GetDefaultView(this.DataContext);
if (myCollectionView == null)
{
return;
}
double halfWidth = this.Width / 2;
double innerRadius = halfWidth * HoleSize;
// compute the total for the property which is being plotted
double total = 0;
foreach (Object item in myCollectionView)
{
total += GetPlottedPropertyValue(item);
}
// add the pie pieces
canvas.Children.Clear();
piePieces.Clear();
double accumulativeAngle = 0;
foreach (Object item in myCollectionView)
{
bool selectedItem = item == myCollectionView.CurrentItem;
double wedgeAngle = GetPlottedPropertyValue(item) * 360 / total;
PiePiece piece = new PiePiece()
{
Radius = halfWidth,
InnerRadius = innerRadius,
CentreX = halfWidth,
CentreY = halfWidth,
PushOut = (selectedItem ? 10.0 : 0),
WedgeAngle = wedgeAngle,
PieceValue = GetPlottedPropertyValue(item),
RotationAngle = accumulativeAngle,
Fill = ColorSelector != null?ColorSelector.SelectBrush(item, myCollectionView.IndexOf(item)) : Brushes.Black,
// record the index of the item which this pie slice represents
Tag = myCollectionView.IndexOf(item),
ToolTip = new ToolTip()
};
piece.ToolTipOpening += new ToolTipEventHandler(PiePieceToolTipOpening);
piece.MouseUp += new MouseButtonEventHandler(PiePieceMouseUp);
piePieces.Add(piece);
canvas.Children.Insert(0, piece);
accumulativeAngle += wedgeAngle;
}
}
private Brush GetBackgroundColor(object item)
{
if (item is IPieceBackgroundColor color)
{
return(color.GetBackgroundColor());
}
return(ColorSelector != null?ColorSelector.SelectBrush(item, -1) : Brushes.Black);
}
private void ConstructPiePieces()
{
double halfWidth = this.Width / 2;
double innerRadius = 2;//halfWidth * HoleSize;
// add the pie pieces
canvas.Children.Clear();
piePieces.Clear();
double accumulativeAngle = 0;
for (int item = 0; item < int.Parse(PlottedProperty); item++)
{
double wedgeAngle = 360 / int.Parse(PlottedProperty);
PiePiece piece = new PiePiece()
{
Radius = halfWidth,
InnerRadius = innerRadius,
CentreX = halfWidth,
CentreY = halfWidth,
PushOut = 0,
WedgeAngle = wedgeAngle,
PieceValue = wedgeAngle,
RotationAngle = accumulativeAngle,
Fill = ColorSelector != null?ColorSelector.SelectBrush(null, item) : Brushes.Black,
// record the index of the item which this pie slice represents
Tag = item,
ToolTip = new ToolTip()
};
piece.ToolTipOpening += new ToolTipEventHandler(PiePieceToolTipOpening);
piece.MouseUp += new MouseButtonEventHandler(PiePieceMouseUp);
piePieces.Add(piece);
canvas.Children.Insert(0, piece);
accumulativeAngle += wedgeAngle;
}
}
/// <summary>
/// Constructs pie pieces and adds them to the visual tree for this control's canvas
/// </summary>
private void ConstructPiePieces()
{
CollectionView myCollectionView = (CollectionView)CollectionViewSource.GetDefaultView(this.DataContext);
if (myCollectionView == null)
{
return;
}
double halfWidth = ((this.ActualHeight < this.ActualWidth ? this.ActualHeight : this.ActualWidth)
- this.Margin.Top - this.Margin.Bottom) / 2;
double innerRadius = halfWidth * HoleSize;
// compute the total for the property which is being plotted
double total = myCollectionView.Cast <object>().Sum(item => GetPlottedPropertyValue(item));
CleanupPie();
// add the pie pieces
double accumulativeAngle = 0;
foreach (Object item in myCollectionView)
{
bool selectedItem = item == myCollectionView.CurrentItem;
double wedgeAngle = GetPlottedPropertyValue(item) * 360 / total;
PiePiece piece = new PiePiece()
{
Radius = halfWidth,
InnerRadius = innerRadius,
CenterX = halfWidth,
CenterY = halfWidth,
PushOut = (selectedItem ? 10.0 : 0),
WedgeAngle = wedgeAngle,
PieceValue = GetPlottedPropertyValue(item),
RotationAngle = accumulativeAngle,
Fill = ColorSelector != null?ColorSelector.SelectBrush(item, myCollectionView.IndexOf(item)) : Brushes.Black,
PieceCaption = GetPlottedCaptionPropertyValue(item),
// record the index of the item which this pie slice represents
Tag = myCollectionView.IndexOf(item),
ToolTip = new ToolTip()
};
piece.ToolTipOpening += PiePieceToolTipOpening;
piece.MouseUp += PiePieceMouseUp;
piePieces.Add(piece);
canvas.Children.Insert(0, piece);
accumulativeAngle += wedgeAngle;
}
}