public TouchEffect(Grid self, Trace t, double minRange)
{
center = t.Center;
InputDevice d = null;
MainBall = new Ellipse {
Fill = DefaultBrush,
HorizontalAlignment = HorizontalAlignment.Left,
VerticalAlignment = VerticalAlignment.Top,
Height = t.Radius * 2,
Width = t.Radius * 2,
Margin = new Thickness {
Left = t.Center.X - t.Radius, Top = t.Center.Y - t.Radius
}
};
Ball = new Ellipse {
Fill = DefaultBrush,
Width = t.Radius,
Height = t.Radius,
HorizontalAlignment = HorizontalAlignment.Left,
VerticalAlignment = VerticalAlignment.Top,
};
Line = new Line {
StrokeThickness = t.Radius / 11,
HorizontalAlignment = HorizontalAlignment.Left,
Stroke = DefaultBrush,
VerticalAlignment = VerticalAlignment.Top,
IsHitTestVisible = false
};
EventHandler <TouchEventArgs> start = (s, e) => {
if (Disabled || d != null)
{
return;
}
d = e.Device;
MoveTo(e.GetTouchPoint(self).Position);
t.Released = false;
var sc = RandomColor();
Ball.Fill = MainBall.Fill = new RadialGradientBrush(sc);
Line.Stroke = new LinearGradientBrush(sc);
ReadyToMove?.Invoke(t.Clone());
};
MainBall.TouchDown += start;
Ball.TouchDown += start;
Line.X1 = t.Center.X;
Line.Y1 = t.Center.Y;
MoveTo(t.Center);
self.Children.Add(Line);
self.Children.Add(Ball);
self.Children.Add(MainBall);
Func <TouchEventArgs, bool> tryMove = e => {
if (e.Device != d)
{
return(false);
}
var to = e.GetTouchPoint(self).Position;
t.Direction = to - t.Center;
MoveTo(to);
return(true);
};
self.TouchMove += (s, e) => {
if (tryMove(e))
{
Moving?.Invoke(t.Clone());
}
};
self.TouchLeave += (s, e) => {
if (!tryMove(e))
{
return;
}
d = null;
t.Released = true;
if (t.Direction.Length < minRange)
{
t.Direction = new Vector();
Reset();
}
else
{
StopMoving?.Invoke(t.Clone());
}
};
}
public TraceEffect(Grid parent, double radius, Point center, Vector direction, double minLength, int i)
{
Index = i;
Center = center;
Radius = radius;
Direction = direction;
MainBall.Height = MainBall.Width = radius * 2;
MainBall.Margin = new Thickness {
Left = center.X - radius, Top = center.Y - radius
};
InputDevice d = null;
var ball = new Ellipse {
Fill = Brushes.pending,
Width = radius,
Height = radius,
HorizontalAlignment = HorizontalAlignment.Left,
VerticalAlignment = VerticalAlignment.Top,
};
var line = new Line {
Stroke = Brushes.pending,
HorizontalAlignment = HorizontalAlignment.Left,
VerticalAlignment = VerticalAlignment.Top,
IsHitTestVisible = false
};
Action <Point> moveTo = newTo => {
ball.Margin = new Thickness {
Left = newTo.X - ball.Width / 2, Top = newTo.Y - ball.Width / 2
};
line.X2 = newTo.X;
line.Y2 = newTo.Y;
};
EventHandler <TouchEventArgs> start = (s, e) => {
if (d != null)
{
return;
}
d = e.Device;
MainBall.Fill = Brushes.picked;
moveTo(e.GetTouchPoint(parent).Position);
ReadyToMove?.Invoke(this, EventArgs.Empty);
};
MainBall.TouchDown += start;
ball.TouchDown += start;
var to = center + Direction;
line.X1 = center.X;
line.Y1 = center.Y;
moveTo(to);
ball.Height = Width / 3;
ball.Width = Width / 3;
parent.Children.Add(line);
parent.Children.Add(MainBall);
parent.Children.Add(ball);
moveTo(to);
Func <TouchEventArgs, bool> tryMove = e => {
if (e.Device != d)
{
return(false);
}
var newTo = e.GetTouchPoint(parent).Position;
Direction = newTo - Center;
moveTo(newTo);
return(true);
};
parent.TouchMove += (s, e) => {
if (tryMove(e))
{
Moving?.Invoke(this, EventArgs.Empty);
}
};
Func <GradientStopCollection> tempSc = () => {
var r = new Random();
var b = new byte[3];
var rr = new List <Color>();
for (var ii = 0; ii < 3; ii++)
{
r.NextBytes(b);
rr.Add(Color.FromArgb(255, b[0], b[1], b[2]));
}
var os = 0;
return(new GradientStopCollection(rr.Select(rrrr => new GradientStop {
Color = rrrr,
Offset = os++ / 2.0
})));
};
parent.TouchLeave += (s, e) => {
if (!tryMove(e))
{
return;
}
d = null;
Released = true;
if (Direction.Length < minLength)
{
Direction = new Vector();
moveTo(center);
}
else
{
var sc = tempSc();
ball.Fill = MainBall.Fill = new RadialGradientBrush(sc);
line.Fill = new LinearGradientBrush(sc);
}
Moved?.Invoke(this, EventArgs.Empty);
};
}