void OnNewContact(object sender, NewContactEventArgs e)
{
if (ClickMode != ClickMode.Hover)
{
e.Handled = true;
if (e.Contact.Capture(this))
{
IsPressed = true;
if (ClickMode == ClickMode.Press && MultitouchScreen.GetContactsCaptured(this).Count() == 1)
{
bool failed = true;
try
{
OnClick();
failed = false;
}
finally
{
if (failed)
{
IsPressed = false;
e.Contact.ReleaseCapture();
}
}
}
}
}
}
public void MultipleContactsCaptureSameObject()
{
Run(() =>
{
window = new TestWindow();
window.NewContact += HandleEvent;
window.Show();
HwndSource source = (HwndSource)PresentationSource.FromVisual(window);
Assert.AreEqual(0, MultitouchScreen.GetContactsCaptured(window.testElement2).Count());
Assert.AreEqual(0, MultitouchScreen.GetContactsCaptured(window.testElement).Count());
window.ExecuteOnNextContact(c => c.Capture(window.testElement));
RawMultitouchReport report = new RawMultitouchReport(CreateContact(GetContactData(0, ContactState.New, new Point(100, 100)), 0, source));
InputManager.Current.ProcessInput(report);
Assert.AreEqual(1, MultitouchScreen.GetContactsCaptured(window.testElement).Count());
window.ExecuteOnNextContact(c => c.Capture(window.testElement));
report = new RawMultitouchReport(CreateContact(GetContactData(1, ContactState.New, new Point(100, 100)), 1, source));
InputManager.Current.ProcessInput(report);
Assert.AreEqual(2, MultitouchScreen.GetContactsCaptured(window.testElement).Count());
Assert.AreEqual(0, MultitouchScreen.GetContactsCaptured(window.testElement2).Count());
Dispatcher.ExitAllFrames();
resetEvent.Set();
});
resetEvent.WaitOne();
}
void OnContactRemoved(object sender, ContactEventArgs e)
{
if (ClickMode != ClickMode.Hover)
{
e.Handled = true;
if (e.Contact.Captured == this)
{
e.Contact.ReleaseCapture();
if (MultitouchScreen.GetContactsCaptured(this).Count() == 0)
{
StopTimer();
IsPressed = false;
}
}
}
}
void OnContactRemoved(object sender, ContactEventArgs e)
{
if (ClickMode != ClickMode.Hover)
{
e.Handled = true;
if (e.Contact.Captured == this)
{
bool shouldMakeClick = IsPressed && ClickMode == ClickMode.Release;
e.Contact.ReleaseCapture();
if (MultitouchScreen.GetContactsCaptured(this).Count() == 0)
{
if (shouldMakeClick)
{
OnClick();
}
IsPressed = false;
}
}
}
}
void OnContactMoved(object sender, ContactEventArgs e)
{
Point position = e.GetPosition(this);
FixedHingeJoint joint;
if (contactJoints.TryGetValue(e.Contact.Id, out joint))
{
joint.Anchor = position.ToVector2D();
//scale
Body body = joint.Bodies.First();
FrameworkElement frameworkElement = body.Tag as FrameworkElement;
if (frameworkElement != null && GetIsScalable(frameworkElement))
{
ScaleState state;
if (elementToScale.TryGetValue(frameworkElement, out state))
{
IEnumerable <Contact> contacts = MultitouchScreen.GetContactsCaptured((IInputElement)e.Source);
double previousDistance = 0;
double currentDistance = 0;
int divisor = 0;
Contact[] contactsArray = contacts.ToArray();
Point center = new Point(frameworkElement.ActualWidth / 2, frameworkElement.ActualHeight / 2);
for (int i = 0; i < contactsArray.Length; i++)
{
for (int j = i + 1; j < contactsArray.Length; j++)
{
Point currFirst = contactsArray[j].GetPosition(this);
Point currSecond = contactsArray[i].GetPosition(this);
Vector vector = frameworkElement.PointFromScreen(currFirst) - frameworkElement.PointFromScreen(currSecond);
currentDistance += vector.Length;
Point prevFirst = contactsArray[j].GetPoints(this).FirstOrDefault();
if (default(Point) == prevFirst)
{
prevFirst = currFirst;
}
Point prevSecond = contactsArray[i].GetPoints(this).FirstOrDefault();
if (default(Point) == prevSecond)
{
prevSecond = currSecond;
}
Vector previousVector = frameworkElement.PointFromScreen(prevFirst) - frameworkElement.PointFromScreen(prevSecond);
previousDistance += previousVector.Length;
divisor++;
}
}
if (divisor == 0)
{
divisor = 1;
}
previousDistance /= divisor;
currentDistance /= divisor;
double delta = currentDistance / previousDistance;
if (double.IsNaN(delta))
{
delta = 1;
}
var newScale = state.Scale * delta;
if (newScale > MaxScale)
{
delta = MaxScale / state.Scale;
}
else if (newScale < MinScale)
{
delta = MinScale / state.Scale;
}
state.Scale *= delta;
state.Center = center;
body.Transformation *= Matrix2x3.FromScale(new Vector2D(delta, delta));
}
}
}
}
