static void RaiseCaptureEvent(Contact contact, RoutedEvent routedEvent, DependencyObject source, long timestamp)
{
ContactEventArgs args = new ContactEventArgs(contact, timestamp);
args.RoutedEvent = routedEvent;
args.Source = source;
MultitouchLogic.RaiseEvent(source, args);
}
public ElementRoutedEventArgs(FrameworkElement element, Point offset, ContactEventArgs e)
{
contactEventArgs = e;
contact = e.Contact;
this.element = element;
this.offset = offset;
}
public bool Capture(Contact contact, IInputElement element, CaptureMode captureMode)
{
if(element == null)
captureMode = CaptureMode.None;
if(captureMode == CaptureMode.None)
element = null;
DependencyObject oldCaptured = contact.InputArgs.Captured;
if(oldCaptured == element)
return true;
using (dispatcher.DisableProcessing())
{
long timestamp = Stopwatch.GetTimestamp();
if (contact.InputArgs.Captured != null)
RaiseCaptureEvent(contact, MultitouchScreen.LostContactCaptureEvent, contact.InputArgs.Captured, timestamp);
contact.InputArgs.Captured = (DependencyObject)element;
contact.InputArgs.CaptureState = captureMode;
if (contact.InputArgs.Captured != null)
RaiseCaptureEvent(contact, MultitouchScreen.GotContactCaptureEvent, contact.InputArgs.Captured, timestamp);
}
return true;
}
internal NewContactEventArgs(Contact contact, int timestamp)
: base(contact, timestamp)
{ }
internal ContactEventArgs(Contact contact, long timestamp)
: base(contact, (int)timestamp)
{ }
protected virtual void EndStroke(Contact contact)
{
Stroke stroke = (Stroke)contact.GetUserData(key);
if (stroke != null)
{
InkCanvasStrokeCollectedEventArgs args = new InkCanvasStrokeCollectedEventArgs(stroke);
OnStrokeCollected(args);
}
}
protected virtual void AddPointsToStroke(Contact contact)
{
Stroke stroke = (Stroke)contact.GetUserData(key);
if (stroke == null)
StartStroke(contact);
else
{
StylusPointCollection stylusPoints = stroke.StylusPoints;
if (stylusPoints != null)
{
Point position = contact.GetPosition(this);
stylusPoints.Add(new StylusPoint(position.X, position.Y, 0.5f));
}
}
}
protected virtual void StartStroke(Contact contact)
{
StylusPointCollection stylusPoints = new StylusPointCollection();
Point position = contact.GetPosition(this);
stylusPoints.Add(new StylusPoint(position.X, position.Y, 0.5f));
Stroke stroke = new Stroke(stylusPoints, DefaultDrawingAttributes);
inkCanvas.Strokes.Add(stroke);
contact.SetUserData(key, stroke);
}
private void EraseStroke(Contact contact)
{
Point position = contact.GetPosition(this);
foreach (Stroke stroke in inkCanvas.Strokes.HitTest(new[] {position}, EraserShape))
{
InkCanvasStrokeErasingEventArgs e = new InkCanvasStrokeErasingEventArgs(stroke);
OnStrokeErasing(e);
if (!e.Cancel)
{
inkCanvas.Strokes.Remove(stroke);
RoutedEventArgs e2 = new RoutedEventArgs(StrokeErasedEvent, this);
RaiseEvent(e2);
}
}
}
private void ErasePoint(Contact contact)
{
Point position = contact.GetPosition(this);
Point[] points = new[] { position };
foreach (Stroke stroke in inkCanvas.Strokes.HitTest(points, EraserShape))
{
InkCanvasStrokeErasingEventArgs e = new InkCanvasStrokeErasingEventArgs(stroke);
OnStrokeErasing(e);
if (!e.Cancel)
{
StrokeCollection eraseResult = stroke.GetEraseResult(points, EraserShape);
inkCanvas.Strokes.Replace(stroke, eraseResult);
RoutedEventArgs e2 = new RoutedEventArgs(StrokeErasedEvent, this);
RaiseEvent(e2);
}
}
}
private void RemovePartialStroke(Contact contact)
{
Stroke stroke = (Stroke) contact.GetUserData(key);
if(stroke != null)
{
inkCanvas.Strokes.Remove(stroke);
contact.SetUserData(key, null);
}
}
