void OnContactMoved(object sender, ContactEventArgs e)
{
if(IsDragging)
{
Point currentPosition = e.GetPosition(this);
if (currentPosition != lastThumbPosition)
{
e.Handled = true;
RaiseEvent(new DragDeltaEventArgs(currentPosition.X - lastThumbPosition.X, currentPosition.Y - lastThumbPosition.Y));
lastThumbPosition = currentPosition;
}
}
}
void OnGotContactCapture(object sender, ContactEventArgs e)
{
if (!IsDragging)
{
IsDragging = true;
screenTotalDelta = new Vector();
originalThumbPosition = e.GetPosition(this);
lastThumbPosition = originalThumbPosition;
bool failed = true;
try
{
RaiseEvent(new DragStartedEventArgs(originalThumbPosition.X, originalThumbPosition.Y));
failed = false;
}
finally
{
if (failed)
CancelDrag();
}
}
}
void OnGotContactCapture(object sender, ContactEventArgs e)
{
FrameworkElement element = (FrameworkElement)e.Source;
FrameworkElement container = ItemsControl.ContainerFromElement(null, element) as FrameworkElement;
if (container != null)
element = container;
Body body;
if (elementToBody.TryGetValue(element, out body))
{
Point position = e.GetPosition(this);
Vector2D contactPoint = position.ToVector2D();
if (body.Shape.CanGetIntersection)
{
Vector2D temp = body.Matrices.ToBody * contactPoint;
IntersectionInfo intersectionInfo;
if (body.Shape.TryGetIntersection(temp, out intersectionInfo))
{
FixedHingeJoint joint = new FixedHingeJoint(body, contactPoint, new Lifespan());
joint.Softness = 0.3;
engine.AddJoint(joint);
contactJoints[e.Contact.Id] = joint;
}
}
}
SetZTop(element);
}
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));
}
}
}
}
void OnContactLeave(object sender, ContactEventArgs e)
{
HitTestResult htr = VisualTreeHelper.HitTest(this, e.GetPosition(this));
if (htr != null) return;
OnContactRemoved(sender, e);
}
void OnContactMoved(object sender, ContactEventArgs e)
{
HitTestResult hitTestResult = VisualTreeHelper.HitTest(this, e.GetPosition(this));
if (hitTestResult != null) return;
if (contactElements.ContainsKey(e.Contact.Id) && eltOffset.ContainsKey(contactElements[e.Contact.Id]))
{
var contactElement = contactElements[e.Contact.Id] as FrameworkElement;
var offset = eltOffset[contactElements[e.Contact.Id]];
eltOffset.Remove(contactElements[e.Contact.Id]);
RaiseElementDraggedEvent(contactElement, offset, e);
e.Contact.ReleaseCapture();
}
}
void OnContactMoved(object sender, ContactEventArgs e)
{
if (e.Contact.Id == firstContactId)
{
Point currentPoint = e.GetPosition(this);
scrollJoint.Anchor = currentPoint.ToVector2D();
}
}
/// <summary>
/// when we drag a node we either want to delete it or move it.
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
protected void finger_Drag(object sender, ContactEventArgs e)
{
Point pos = e.GetPosition(drawingConfiguration.ellipse);
Point currpos = new Point(drawingConfiguration.ellipse.Margin.Left, drawingConfiguration.ellipse.Margin.Top);
bool nearLeft = currpos.X + pos.X - drawingConfiguration.ellipse.Width / 2 < 0;
bool nearTop = currpos.Y + pos.Y - drawingConfiguration.ellipse.Height / 2 < 0;
Int32 state = window.getAppState();
if (state == MainWindow.APPSTATE_DEFAULT)
{
moveThis(pos);
}
//if it's within the edge, then delete it
}
/// <summary>
/// When the ellipse is touched, we show that it's being selected
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
protected void finger_Contact(object sender, ContactEventArgs e)
{
drawingConfiguration.selected = true;
drawingConfiguration.ellipse.Fill = Brushes.Green;
Int32 state = window.getAppState();
if (state == MainWindow.APPSTATE_CHOOSE_FIRST_NODE_TO_TOGGLE_CONNECTION || state == MainWindow.APPSTATE_CHOOSE_SECOND_NODE_TO_TOGGLE_CONNECTION)
{
window.makeConnection(data.number);
}
else if (state == MainWindow.APPSTATE_CHOOSE_NODE_TO_DELETE)
{
this.delete();
}
else if (state == MainWindow.APPSTATE_CHOOSE_NODE_TO_EDIT)
{
window.editNode(this);
} else if (state == MainWindow.APPSTATE_DEFAULT) {
Point position = e.GetPosition(drawingConfiguration.ellipse);
this.moveThis(position);
}
//Point pos = e.GetPosition(null);
}
/// <summary>
/// Called when contact is moved.
/// </summary>
/// <param name="sender">The sender.</param>
/// <param name="e">The <see cref="Multitouch.Framework.WPF.Input.ContactEventArgs"/> instance containing the event data.</param>
protected virtual void OnContactMoved(object sender, ContactEventArgs e)
{
Point position = e.GetPosition(this);
if(points.ContainsKey(e.Contact.Id))
points[e.Contact.Id].Add(new StylusPoint(position.X, position.Y));
}
/// <summary>
/// Called when is removed.
/// </summary>
/// <param name="sender">The sender.</param>
/// <param name="e">The <see cref="Multitouch.Framework.WPF.Input.ContactEventArgs"/> instance containing the event data.</param>
protected virtual void OnContactRemoved(object sender, ContactEventArgs e)
{
Point position = e.GetPosition(this);
StylusPointCollection pointCollection = points[e.Contact.Id];
pointCollection.Add(new StylusPoint(position.X, position.Y));
points.Remove(e.Contact.Id);
Stroke stroke = new Stroke(pointCollection);
raiseGestureOrStrokeCollectedMethod(this, new InkCanvasStrokeCollectedEventArgs(stroke), true);
}