/// <summary>
/// Handles the MouseMove event.
/// </summary>
/// <param name="e">The event arguments.</param>
protected override void OnMouseMove(MouseEventArgs e)
{
base.OnMouseMove(e);
DrawingMetrics m = HitTest(new PointF(e.X, e.Y));
SetFocusedItem(m == null ? null : m.Item);
}
/// <summary>
/// Constructs the array of DrawingMetrics, which store drawing information about each pie slice.
/// </summary>
private List <DrawingMetrics> ConstructDrawingMetrics(Rectangle bounds, Padding padding)
{
List <DrawingMetrics> results = new List <DrawingMetrics>();
try
{
// increment the transaction reference counter so that any modifications in this method don't lead to a recursive redrawing of the control.
transactionRef++;
if (Items.TotalItemWeight == 0)
{
return(results);
}
if (Style.AutoSizePie)
{
Style.RadiusInternal = GetAutoSizeRadius(bounds, padding);
}
float angleUsed = Style.Rotation;
for (int i = 0; i < Items.Count; i++)
{
DrawingMetrics dm = new DrawingMetrics(this, Items[i], bounds, angleUsed, (float)(Items[i].Percent * Math.PI * 2));
results.Add(dm);
angleUsed += (float)dm.SweepAngle;
}
// sort the drawing metrics in the order they should be drawn
results.Sort();
}
finally
{
// end our transaction
transactionRef--;
}
return(results);
}
/// <summary>
/// Constructs the array of DrawingMetrics, which store drawing information about each pie slice.
/// </summary>
private List<DrawingMetrics> ConstructDrawingMetrics(Rectangle bounds, Padding padding)
{
List<DrawingMetrics> results = new List<DrawingMetrics>();
try
{
// increment the transaction reference counter so that any modifications in this method don't lead to a recursive redrawing of the control.
transactionRef++;
if (Items.TotalItemWeight == 0)
return results;
if (Style.AutoSizePie)
Style.RadiusInternal = GetAutoSizeRadius(bounds, padding);
float angleUsed = Style.Rotation;
for (int i = 0; i < Items.Count; i++)
{
DrawingMetrics dm = new DrawingMetrics(this, Items[i], bounds, angleUsed, (float)(Items[i].Percent * Math.PI * 2));
results.Add(dm);
angleUsed += (float)dm.SweepAngle;
}
// sort the drawing metrics in the order they should be drawn
results.Sort();
}
finally
{
// end our transaction
transactionRef--;
}
return results;
}
