private void selectionRequested(PathControlPointPiece piece, MouseButtonEvent e)
{
if (e.Button == MouseButton.Left && inputManager.CurrentState.Keyboard.ControlPressed)
{
piece.IsSelected.Toggle();
}
else
{
SetSelectionTo(piece.ControlPoint);
}
}
private void selectPiece(PathControlPointPiece piece, MouseButtonEvent e)
{
if (e.Button == MouseButton.Left && inputManager.CurrentState.Keyboard.ControlPressed)
{
piece.IsSelected.Toggle();
}
else
{
foreach (var p in Pieces)
{
p.IsSelected.Value = p == piece;
}
}
}
private void addControlPoints(IEnumerable <PathControlPoint> controlPoints)
{
foreach (var point in controlPoints)
{
var piece = new PathControlPointPiece(slider, point);
if (allowSelection)
{
piece.RequestSelection = selectPiece;
}
Pieces.Add(piece);
}
}
protected override void Update()
{
base.Update();
while (slider.Path.ControlPoints.Count > Pieces.Count)
{
var piece = new PathControlPointPiece(slider, Pieces.Count);
if (allowSelection)
{
piece.RequestSelection = selectPiece;
}
Pieces.Add(piece);
}
while (slider.Path.ControlPoints.Count < Pieces.Count)
{
Pieces.Remove(Pieces[Pieces.Count - 1]);
}
}
/// <summary>
/// Attempts to set the given control point piece to the given path type.
/// If that would fail, try to change the path such that it instead succeeds
/// in a UX-friendly way.
/// </summary>
/// <param name="piece">The control point piece that we want to change the path type of.</param>
/// <param name="type">The path type we want to assign to the given control point piece.</param>
private void updatePathType(PathControlPointPiece piece, PathType?type)
{
int indexInSegment = piece.PointsInSegment.IndexOf(piece.ControlPoint);
switch (type)
{
case PathType.PerfectCurve:
// Can't always create a circular arc out of 4 or more points,
// so we split the segment into one 3-point circular arc segment
// and one segment of the previous type.
int thirdPointIndex = indexInSegment + 2;
if (piece.PointsInSegment.Count > thirdPointIndex + 1)
{
piece.PointsInSegment[thirdPointIndex].Type = piece.PointsInSegment[0].Type;
}
break;
}
piece.ControlPoint.Type = type;
}
protected override void Update()
{
base.Update();
while (slider.Path.ControlPoints.Length > Pieces.Count)
{
var piece = new PathControlPointPiece(slider, Pieces.Count)
{
ControlPointsChanged = c => ControlPointsChanged?.Invoke(c),
};
if (allowSelection)
{
piece.RequestSelection = selectPiece;
}
Pieces.Add(piece);
}
while (slider.Path.ControlPoints.Length < Pieces.Count)
{
Pieces.Remove(Pieces[Pieces.Count - 1]);
}
}