public void CurrentAndFutureItems()
{
var source = new LifetimeSource();
var p1 = new Perishable <int>(1, source.Lifetime);
var p2 = new Perishable <int>(1, Lifetime.Immortal);
var p = new PerishableCollection <int>();
var li0 = new List <Perishable <int> >();
p.CurrentAndFutureItems().Subscribe(e => {
li0.Add(e);
e.Lifetime.WhenDead(() => li0.Remove(e));
});
li0.AssertSequenceEquals();
p.Add(p1);
li0.AssertSequenceEquals(p1);
var li1 = new List <Perishable <int> >();
p.CurrentAndFutureItems().Subscribe(e => {
li1.Add(e);
e.Lifetime.WhenDead(() => li1.Remove(e));
});
li1.AssertSequenceEquals(p1);
p.Add(p2.Value, p2.Lifetime);
li0.AssertSequenceEquals(p1, p2);
li1.AssertSequenceEquals(p1, p2);
source.EndLifetime();
li0.AssertSequenceEquals(p2);
li1.AssertSequenceEquals(p2);
}
public void CurrentAndFutureItems() {
var source = new LifetimeSource();
var p1 = new Perishable<int>(1, source.Lifetime);
var p2 = new Perishable<int>(1, Lifetime.Immortal);
var p = new PerishableCollection<int>();
var li0 = new List<Perishable<int>>();
p.CurrentAndFutureItems().Subscribe(e => {
li0.Add(e);
e.Lifetime.WhenDead(() => li0.Remove(e));
});
li0.AssertSequenceEquals();
p.Add(p1);
li0.AssertSequenceEquals(p1);
var li1 = new List<Perishable<int>>();
p.CurrentAndFutureItems().Subscribe(e => {
li1.Add(e);
e.Lifetime.WhenDead(() => li1.Remove(e));
});
li1.AssertSequenceEquals(p1);
p.Add(p2.Value, p2.Lifetime);
li0.AssertSequenceEquals(p1, p2);
li1.AssertSequenceEquals(p1, p2);
source.EndLifetime();
li0.AssertSequenceEquals(p2);
li1.AssertSequenceEquals(p2);
}
///<summary>Handles periodically adding children to existing balls.</summary>
public static void SetupPeriodicChildSpawning(this Game game, double expectedPerBallPerSecond, int maxChildrenPerBall, int maxGeneration) {
game.Balls.CurrentAndFutureItems().Subscribe(
ball => {
if (ball.Value.Generation > maxGeneration) return;
// keep track of children
var curChildCount = 0;
var children = new PerishableCollection<Ball>();
children
.CurrentAndFutureItems()
.ObserveNonPerishedCount(completeWhenSourceCompletes: true)
.Subscribe(e => curChildCount = e, ball.Lifetime);
// spawn children periodically at random
game.StochasticRate(
expectedPerBallPerSecond,
ball.Lifetime,
() => {
if (curChildCount >= maxChildrenPerBall) return;
var child = game.SpawnBall(parent: ball.Value);
game.Connectors.Add(new Connector {Child = child, Parent = ball.Value}, child.Life.Lifetime);
children.Add(child, child.Life.Lifetime);
});
},
game.Life);
}
///<summary>Handles periodically adding children to existing balls.</summary>
public static void SetupPeriodicChildSpawning(this Game game, double expectedPerBallPerSecond, int maxChildrenPerBall, int maxGeneration)
{
game.Balls.CurrentAndFutureItems().Subscribe(
ball => {
if (ball.Value.Generation > maxGeneration)
{
return;
}
// keep track of children
var curChildCount = 0;
var children = new PerishableCollection <Ball>();
children
.CurrentAndFutureItems()
.ObserveNonPerishedCount(completeWhenSourceCompletes: true)
.Subscribe(e => curChildCount = e, ball.Lifetime);
// spawn children periodically at random
game.StochasticRate(
expectedPerBallPerSecond,
ball.Lifetime,
() => {
if (curChildCount >= maxChildrenPerBall)
{
return;
}
var child = game.SpawnBall(parent: ball.Value);
game.Connectors.Add(new Connector {
Child = child, Parent = ball.Value
}, child.Life.Lifetime);
children.Add(child, child.Life.Lifetime);
});
},
game.Life);
}
///<summary>Causes a rotating rectangle that grows and fades in then shrinks and fades out to be shown.</summary>
public static Lifetime AnimateSpinningRectangleExplosion(this Game game,
PerishableCollection<UIElement> controls,
Func<double, Point> position,
Color color,
TimeSpan duration,
double rotationsPerSecond,
double finalRadius) {
var rect = new Rectangle {
RenderTransformOrigin = new Point(0.5, 0.5)
};
var life = game.AnimateWith(
duration,
(step, portion, ellapsed) => {
var nearHalfPortion = (portion - 0.5).Abs()*2;
var radius = 0.LerpTo(finalRadius, 1 - nearHalfPortion);
var pos = position(portion);
rect.Width = rect.Height = radius*2;
rect.RenderTransform = new TransformGroup {
Children = new TransformCollection {
new RotateTransform(rotationsPerSecond*ellapsed.TotalSeconds*360),
new TranslateTransform(pos.X - radius, pos.Y - radius)
}
};
rect.Fill = new SolidColorBrush(color.LerpToTransparent(nearHalfPortion));
});
controls.Add(rect, life);
return life;
}
///<summary>Causes a rotating rectangle that grows and fades in then shrinks and fades out to be shown.</summary>
public static Lifetime AnimateSpinningRectangleExplosion(this Game game,
PerishableCollection <UIElement> controls,
Func <double, Point> position,
Color color,
TimeSpan duration,
double rotationsPerSecond,
double finalRadius)
{
var rect = new Rectangle {
RenderTransformOrigin = new Point(0.5, 0.5)
};
var life = game.AnimateWith(
duration,
(step, portion, ellapsed) => {
var nearHalfPortion = (portion - 0.5).Abs() * 2;
var radius = 0.LerpTo(finalRadius, 1 - nearHalfPortion);
var pos = position(portion);
rect.Width = rect.Height = radius * 2;
rect.RenderTransform = new TransformGroup {
Children = new TransformCollection {
new RotateTransform(rotationsPerSecond * ellapsed.TotalSeconds * 360),
new TranslateTransform(pos.X - radius, pos.Y - radius)
}
};
rect.Fill = new SolidColorBrush(color.LerpToTransparent(nearHalfPortion));
});
controls.Add(rect, life);
return(life);
}
public void CurrentItems() {
var source = new LifetimeSource();
var p1 = new Perishable<int>(1, source.Lifetime);
var p2 = new Perishable<int>(1, Lifetime.Immortal);
var p = new PerishableCollection<int>();
p.CurrentItems().AssertSequenceEquals();
p.Add(p1);
p.CurrentItems().AssertSequenceEquals(p1);
p.Add(p2.Value, p2.Lifetime);
p.CurrentItems().AssertSequenceEquals(p1, p2);
source.EndLifetime();
p.CurrentItems().AssertSequenceEquals(p2);
}
public void IsResultThreadSafe()
{
foreach (var repeat in Enumerable.Range(0, 5))
{
var n = 5000;
var nt = 4;
var p = new PerishableCollection <int>();
var queues = Enumerable.Range(0, 4).Select(e => new Queue <LifetimeSource>()).ToArray();
TestUtil.ConcurrencyTest(
threadCount: nt,
callbackCount: n,
repeatedWork: (t, i) => {
var r = new LifetimeSource();
p.Add(i, r.Lifetime);
if (i % 2 == 0)
{
queues[t].Enqueue(r);
}
if (queues[t].Count > 20)
{
queues[t].Dequeue().EndLifetime();
}
},
finalWork: t => {
while (queues[t].Count > 0)
{
queues[t].Dequeue().EndLifetime();
}
});
var expected = Enumerable.Range(0, n).Where(e => e % 2 != 0).SelectMany(e => Enumerable.Repeat(e, nt));
p.CurrentItems().OrderBy(e => e.Value).Select(e => e.Value).AssertSequenceEquals(expected);
}
}
public void CurrentItems()
{
var source = new LifetimeSource();
var p1 = new Perishable <int>(1, source.Lifetime);
var p2 = new Perishable <int>(1, Lifetime.Immortal);
var p = new PerishableCollection <int>();
p.CurrentItems().AssertSequenceEquals();
p.Add(p1);
p.CurrentItems().AssertSequenceEquals(p1);
p.Add(p2.Value, p2.Lifetime);
p.CurrentItems().AssertSequenceEquals(p1, p2);
source.EndLifetime();
p.CurrentItems().AssertSequenceEquals(p2);
}
private void SetupMouseCutter(Game game, PerishableCollection <UIElement> controls)
{
// create rectangle to center under mouse
var rotater = new RotateTransform();
var translater = new TranslateTransform();
var mouseTarget = new Rectangle {
Width = 10,
Height = 10,
Fill = new SolidColorBrush(Colors.Black),
IsHitTestVisible = false,
RenderTransform = new TransformGroup {
Children = new TransformCollection {
rotater,
translater
}
},
Visibility = Visibility.Collapsed,
RenderTransformOrigin = new Point(0.5, 0.5)
};
controls.Add(mouseTarget, game.Life);
// make the rectangle rotate
rotater.BeginAnimation(
RotateTransform.AngleProperty,
new DoubleAnimation(0, 360, 1.Seconds())
{
RepeatBehavior = RepeatBehavior.Forever
});
// watch mouse position over canvas, keeping the rotating rectangle centered on it
var liveMousePos = default(Point?);
MouseEventHandler h = (sender, arg) => {
mouseTarget.Visibility = Visibility.Visible;
liveMousePos = arg.GetPosition(canvas);
translater.X = liveMousePos.Value.X - mouseTarget.Width / 2;
translater.Y = liveMousePos.Value.Y - mouseTarget.Height / 2;
};
MouseEventHandler h2 = (sender, arg) => {
mouseTarget.Visibility = Visibility.Collapsed;
liveMousePos = null;
};
canvas.MouseMove += h;
canvas.MouseLeave += h2;
game.Life.WhenDead(() => canvas.MouseMove -= h);
game.Life.WhenDead(() => canvas.MouseLeave -= h2);
// pass along mouse positions to the game
game.SetupMouseCutter(
controls,
() => liveMousePos,
cutTolerance: 5);
}
public void CurrentAndFutureItems_EndingDuringEnumerationDoesNotLockup() {
var s = new LifetimeSource();
var p = new PerishableCollection<int>();
for (var i = 0; i < 1000; i++) {
p.Add(i, Lifetime.Immortal);
}
var t = Task.Factory.StartNew(
() => p.CurrentAndFutureItems().Subscribe(
item => s.EndLifetime(),
s.Lifetime));
t.Wait(TimeSpan.FromMilliseconds(100));
t.AssertRanToCompletion();
}
public void ToPerishableCollectionWithLifetime()
{
var source = new LifetimeSource();
var collectionSource = new LifetimeSource();
var p1 = new Perishable <int>(1, source.Lifetime);
var p2 = new Perishable <int>(1, Lifetime.Immortal);
var p = new PerishableCollection <int>();
var q = p.CurrentAndFutureItems().ToPerishableCollection(collectionSource.Lifetime);
q.CurrentItems().AssertSequenceEquals();
p.Add(p1);
q.CurrentItems().AssertSequenceEquals(p1);
collectionSource.EndLifetime();
p.Add(p2.Value, p2.Lifetime);
q.CurrentItems().AssertSequenceEquals(p1);
source.EndLifetime();
source.EndLifetime();
q.CurrentItems().AssertSequenceEquals();
}
public void CurrentAndFutureItems_EndingDuringEnumerationDoesNotLockup()
{
var s = new LifetimeSource();
var p = new PerishableCollection <int>();
for (var i = 0; i < 1000; i++)
{
p.Add(i, Lifetime.Immortal);
}
var t = Task.Factory.StartNew(
() => p.CurrentAndFutureItems().Subscribe(
item => s.EndLifetime(),
s.Lifetime));
t.Wait(TimeSpan.FromMilliseconds(100));
t.AssertRanToCompletion();
}
///<summary>Handles making ellipse controls for each ball in the game, as while as showing their death animations.</summary>
public static void SetupDrawBallsAsControls(this Game game, PerishableCollection <UIElement> controls, TimeSpan deathFadeOutDuration, double deathFinalRadiusFactor)
{
game.Balls.CurrentAndFutureItems().Subscribe(
e => {
// create an ellipse control to visually represent the ball
var ball = e.Value;
var color = ball.Hue.HueToApproximateColor(period: 3);
var ellipseControl = new Ellipse {
Width = ball.Radius * 2,
Height = ball.Radius * 2,
VerticalAlignment = VerticalAlignment.Top,
HorizontalAlignment = HorizontalAlignment.Left,
Fill = new SolidColorBrush(color)
};
// 'root' balls have a black border
if (ball.Generation == 1)
{
ellipseControl.StrokeThickness = 3;
ellipseControl.Stroke = new SolidColorBrush(Colors.Black);
}
// reposition ellipse control during each game loop, until ball is dead
game.LoopActions.Add(
step => ellipseControl.Reposition(ball.Pos, ball.Radius),
e.Lifetime);
// once ball is dead, expand and fade out the ellipse
var controlLifetime = e.Lifetime.ThenResurrect(() =>
game.AnimateWith(
deathFadeOutDuration,
(step, portion, dt) => {
// fade out
ellipseControl.Fill = new SolidColorBrush(color.LerpToTransparent(portion));
// expand
var radius = ball.Radius * 1.LerpTo(deathFinalRadiusFactor, portion);
ellipseControl.Reposition(ball.Pos, radius);
}));
controls.Add(ellipseControl, controlLifetime);
},
game.Life);
}
public void IsEnumeratingWhileMutatingThreadSafe()
{
foreach (var repeat in Enumerable.Range(0, 5))
{
var n = 5000;
var nt = 4;
var p = new PerishableCollection <int>();
var queues = Enumerable.Range(0, 4).Select(e => new Queue <LifetimeSource>()).ToArray();
TestUtil.ConcurrencyTest(
threadCount: nt,
callbackCount: n,
repeatedWork: (t, i) => {
if (t % 2 == 0)
{
if (i % 500 != 0)
{
return;
}
var r = p.CurrentItems().OrderBy(e => e.Value).ToList();
(r.Count(e => e.Value % 2 == 0 && !e.Lifetime.IsDead) < nt / 2 * 20).AssertIsTrue();
}
else
{
var r = new LifetimeSource();
p.Add(i, r.Lifetime);
if (i % 2 == 0)
{
queues[t].Enqueue(r);
}
if (queues[t].Count > 20)
{
queues[t].Dequeue().EndLifetime();
}
}
},
finalWork: t => {
while (queues[t].Count > 0)
{
queues[t].Dequeue().EndLifetime();
}
});
}
}
///<summary>Handles making line controls for each connector in the game, as while as showing their death animations.</summary>
public static void SetupDrawConnectorsAsControls(this Game game,
PerishableCollection <UIElement> controls,
TimeSpan deathFadeDuration,
double deathFinalThicknessFactor,
Color cutBangColor,
TimeSpan cutBangDuration,
double cutBangMaxRadius,
Color propagateBangColor,
TimeSpan propagateBangDuration,
double propagateBangRotationsPerSecond,
double propagateBangMaxRadius)
{
game.Connectors.CurrentAndFutureItems().Subscribe(
e => {
// create a line control to visually represent the line
var con = e.Value;
var thickness = con.Child.Radius * 0.1;
var lineControl = new Line {
Stroke = new SolidColorBrush(Colors.Black),
StrokeThickness = thickness,
};
// reposition line control during each game loop, until the connector is dead
game.LoopActions.Add(
step => lineControl.Reposition(con.Line),
e.Lifetime);
// show a bang if the connector is cut
e.Lifetime.WhenDead(() => {
if (con.CutPoint == null || con.CutDir == null)
{
return;
}
var cutLineControl = new Line {
Stroke = new SolidColorBrush(cutBangColor),
StrokeThickness = thickness,
};
var p = con.CutPoint.Value;
var d = con.CutDir.Value * cutBangMaxRadius;
var life = game.AnimateWith(
cutBangDuration,
(step, prop, elapsed) => {
var c = 1 - (prop - 0.5).Abs() * 2;
cutLineControl.Reposition((p - d * c).To(p + d * c));
cutLineControl.StrokeThickness = prop * cutBangMaxRadius / 2;
cutLineControl.Stroke = new SolidColorBrush(cutBangColor.LerpToTransparent(1 - c));
});
controls.Add(cutLineControl, life);
});
// show a bang travelling along the connector when it dies
e.Lifetime.WhenDead(() =>
game.AnimateSpinningRectangleExplosion(
controls,
p => (con.CutPoint == null ? con.Line.Start : con.CutPoint.Value.ClosestPointOn(con.Line)).To(e.Value.Line.End).LerpAcross(p),
propagateBangColor,
propagateBangDuration,
propagateBangRotationsPerSecond,
propagateBangMaxRadius));
// expand and fade out the line control after the connector dies
var controlLife = e.Lifetime.ThenResurrect(() => game.AnimateWith(
deathFadeDuration,
(step, portion, dt) => {
lineControl.StrokeThickness = thickness * 1.LerpTo(deathFinalThicknessFactor, portion);
lineControl.Stroke = new SolidColorBrush(Colors.Black.LerpToTransparent(portion));
//lineControl.Reposition(e.Value.Line);
}));
controls.Add(lineControl, controlLife);
},
game.Life);
}
///<summary>Handles making line controls for each connector in the game, as while as showing their death animations.</summary>
public static void SetupDrawConnectorsAsControls(this Game game,
PerishableCollection<UIElement> controls,
TimeSpan deathFadeDuration,
double deathFinalThicknessFactor,
Color cutBangColor,
TimeSpan cutBangDuration,
double cutBangMaxRadius,
Color propagateBangColor,
TimeSpan propagateBangDuration,
double propagateBangRotationsPerSecond,
double propagateBangMaxRadius) {
game.Connectors.CurrentAndFutureItems().Subscribe(
e => {
// create a line control to visually represent the line
var con = e.Value;
var thickness = con.Child.Radius * 0.1;
var lineControl = new Line {
Stroke = new SolidColorBrush(Colors.Black),
StrokeThickness = thickness,
};
// reposition line control during each game loop, until the connector is dead
game.LoopActions.Add(
step => lineControl.Reposition(con.Line),
e.Lifetime);
// show a bang if the connector is cut
e.Lifetime.WhenDead(() => {
if (con.CutPoint == null || con.CutDir == null) return;
var cutLineControl = new Line {
Stroke = new SolidColorBrush(cutBangColor),
StrokeThickness = thickness,
};
var p = con.CutPoint.Value;
var d = con.CutDir.Value*cutBangMaxRadius;
var life = game.AnimateWith(
cutBangDuration,
(step, prop, elapsed) => {
var c = 1 - (prop - 0.5).Abs()*2;
cutLineControl.Reposition((p - d*c).To(p + d*c));
cutLineControl.StrokeThickness = prop*cutBangMaxRadius/2;
cutLineControl.Stroke = new SolidColorBrush(cutBangColor.LerpToTransparent(1 - c));
});
controls.Add(cutLineControl, life);
});
// show a bang travelling along the connector when it dies
e.Lifetime.WhenDead(() =>
game.AnimateSpinningRectangleExplosion(
controls,
p => (con.CutPoint == null ? con.Line.Start : con.CutPoint.Value.ClosestPointOn(con.Line)).To(e.Value.Line.End).LerpAcross(p),
propagateBangColor,
propagateBangDuration,
propagateBangRotationsPerSecond,
propagateBangMaxRadius));
// expand and fade out the line control after the connector dies
var controlLife = e.Lifetime.ThenResurrect(() => game.AnimateWith(
deathFadeDuration,
(step, portion, dt) => {
lineControl.StrokeThickness = thickness * 1.LerpTo(deathFinalThicknessFactor, portion);
lineControl.Stroke = new SolidColorBrush(Colors.Black.LerpToTransparent(portion));
//lineControl.Reposition(e.Value.Line);
}));
controls.Add(lineControl, controlLife);
},
game.Life);
}
///<summary>Handles making ellipse controls for each ball in the game, as while as showing their death animations.</summary>
public static void SetupDrawBallsAsControls(this Game game, PerishableCollection<UIElement> controls, TimeSpan deathFadeOutDuration, double deathFinalRadiusFactor) {
game.Balls.CurrentAndFutureItems().Subscribe(
e => {
// create an ellipse control to visually represent the ball
var ball = e.Value;
var color = ball.Hue.HueToApproximateColor(period: 3);
var ellipseControl = new Ellipse {
Width = ball.Radius * 2,
Height = ball.Radius * 2,
VerticalAlignment = VerticalAlignment.Top,
HorizontalAlignment = HorizontalAlignment.Left,
Fill = new SolidColorBrush(color)
};
// 'root' balls have a black border
if (ball.Generation == 1) {
ellipseControl.StrokeThickness = 3;
ellipseControl.Stroke = new SolidColorBrush(Colors.Black);
}
// reposition ellipse control during each game loop, until ball is dead
game.LoopActions.Add(
step => ellipseControl.Reposition(ball.Pos, ball.Radius),
e.Lifetime);
// once ball is dead, expand and fade out the ellipse
var controlLifetime = e.Lifetime.ThenResurrect(() =>
game.AnimateWith(
deathFadeOutDuration,
(step, portion, dt) => {
// fade out
ellipseControl.Fill = new SolidColorBrush(color.LerpToTransparent(portion));
// expand
var radius = ball.Radius * 1.LerpTo(deathFinalRadiusFactor, portion);
ellipseControl.Reposition(ball.Pos, radius);
}));
controls.Add(ellipseControl, controlLifetime);
},
game.Life);
}
public void IsEnumeratingWhileMutatingThreadSafe() {
foreach (var repeat in Enumerable.Range(0, 5)) {
var n = 5000;
var nt = 4;
var p = new PerishableCollection<int>();
var queues = Enumerable.Range(0, 4).Select(e => new Queue<LifetimeSource>()).ToArray();
TestUtil.ConcurrencyTest(
threadCount: nt,
callbackCount: n,
repeatedWork: (t, i) => {
if (t%2 == 0) {
if (i%500 != 0) return;
var r = p.CurrentItems().OrderBy(e => e.Value).ToList();
(r.Count(e => e.Value%2 == 0 && !e.Lifetime.IsDead) < nt/2 * 20).AssertIsTrue();
} else {
var r = new LifetimeSource();
p.Add(i, r.Lifetime);
if (i % 2 == 0) queues[t].Enqueue(r);
if (queues[t].Count > 20)
queues[t].Dequeue().EndLifetime();
}
},
finalWork: t => {
while (queues[t].Count > 0)
queues[t].Dequeue().EndLifetime();
});
}
}
public void IsResultThreadSafe() {
foreach (var repeat in Enumerable.Range(0, 5)) {
var n = 5000;
var nt = 4;
var p = new PerishableCollection<int>();
var queues = Enumerable.Range(0, 4).Select(e => new Queue<LifetimeSource>()).ToArray();
TestUtil.ConcurrencyTest(
threadCount: nt,
callbackCount: n,
repeatedWork: (t, i) => {
var r = new LifetimeSource();
p.Add(i, r.Lifetime);
if (i % 2 == 0) queues[t].Enqueue(r);
if (queues[t].Count > 20)
queues[t].Dequeue().EndLifetime();
},
finalWork: t => {
while (queues[t].Count > 0)
queues[t].Dequeue().EndLifetime();
});
var expected = Enumerable.Range(0, n).Where(e => e%2 != 0).SelectMany(e => Enumerable.Repeat(e, nt));
p.CurrentItems().OrderBy(e => e.Value).Select(e => e.Value).AssertSequenceEquals(expected);
}
}
private void SetupMouseCutter(Game game, PerishableCollection<UIElement> controls) {
// create rectangle to center under mouse
var rotater = new RotateTransform();
var translater = new TranslateTransform();
var mouseTarget = new Rectangle {
Width = 10,
Height = 10,
Fill = new SolidColorBrush(Colors.Black),
IsHitTestVisible = false,
RenderTransform = new TransformGroup {
Children = new TransformCollection {
rotater,
translater
}
},
Visibility = Visibility.Collapsed,
RenderTransformOrigin = new Point(0.5, 0.5)
};
controls.Add(mouseTarget, game.Life);
// make the rectangle rotate
rotater.BeginAnimation(
RotateTransform.AngleProperty,
new DoubleAnimation(0, 360, 1.Seconds()) { RepeatBehavior = RepeatBehavior.Forever });
// watch mouse position over canvas, keeping the rotating rectangle centered on it
var liveMousePos = default(Point?);
MouseEventHandler h = (sender, arg) => {
mouseTarget.Visibility = Visibility.Visible;
liveMousePos = arg.GetPosition(canvas);
translater.X = liveMousePos.Value.X - mouseTarget.Width / 2;
translater.Y = liveMousePos.Value.Y - mouseTarget.Height / 2;
};
MouseEventHandler h2 = (sender, arg) => {
mouseTarget.Visibility = Visibility.Collapsed;
liveMousePos = null;
};
canvas.MouseMove += h;
canvas.MouseLeave += h2;
game.Life.WhenDead(() => canvas.MouseMove -= h);
game.Life.WhenDead(() => canvas.MouseLeave -= h2);
// pass along mouse positions to the game
game.SetupMouseCutter(
controls,
() => liveMousePos,
cutTolerance: 5);
}