protected override void OnMouseLeftButtonUp(MouseButtonEventArgs e)
{
if (_draggedHandle == null)
{
return;
}
ReleaseMouseCapture();
_draggedHandle = null;
BezierHandleReleased?.Invoke();
}
private void ConfigureBezierHandle(BezierHandle handle, Line handleLine)
{
handle.MouseLeftButtonDown += (sender, args) =>
{
if (IsReadOnly)
{
return;
}
_initialPosition = new Point((double)handle.GetValue(Canvas.LeftProperty) + 4d, (double)handle.GetValue(Canvas.TopProperty) + 4d);
_dragStartMousePosition = args.GetPosition(this);
_draggedHandle = handle;
Mouse.Capture(this);
};
}
public override void OnApplyTemplate()
{
base.OnApplyTemplate();
_path = GetTemplateChild("Path") as Path;
_canvas = GetTemplateChild("Canvas") as Canvas;
_handleA = GetTemplateChild("HandleA") as BezierHandle;
_handleB = GetTemplateChild("HandleB") as BezierHandle;
_handleALine = GetTemplateChild("HandleALine") as Line;
_handleBLine = GetTemplateChild("HandleBLine") as Line;
ConfigureBezierHandle(_handleA, _handleALine);
ConfigureBezierHandle(_handleB, _handleBLine);
_curveOptionsComboBox = GetTemplateChild("CurveOptionsComboBox") as ComboBox;
_curveOptionsComboBox.ItemsSource = new List <CurveType> {
CurveType.Linear, CurveType.Hold, CurveType.Bezier
};
UpdateForCurveType();
}
private void UpdateBezierHandle(BezierHandle handle, Line handleLine, in Vector2 location)
