//update velocities, velocity = distance/time
public void Update(ManipulationDeltaEventArgs e, float history)
{
float elappsedMS = stopwatch.ElapsedMilliseconds;
if (elappsedMS == 0)
elappsedMS = 1;
InitialVelocity = InitialVelocity * history + ((VectorF)e.TranslationDelta * (1F - history)) / elappsedMS;
InitialAngularVelocity = InitialAngularVelocity * history + (e.RotationDelta * (1F - history)) / elappsedMS;
InitialExpansionVelocity = InitialExpansionVelocity * history + (e.ExpansionDelta * (1F - history)) / elappsedMS;
stopwatch.Reset();
stopwatch.Start();
}
private void ProcessManipulationDelta(object sender, ManipulationDeltaEventArgs e)
{
DrawingObject obj = FindObject(Point.Round(e.Location));
if (obj == null)
return;
obj.Move(e.TranslationDelta.ToSize());
obj.Rotate(-e.RotationDelta, Point.Round(e.Location));
obj.Zoom(e.ScaleDelta, Point.Round(e.Location));
Invalidate();
}
/// <summary>
/// Handler for the touch events and gestures
/// </summary>
void ProcessManipulationDelta(object sender, Windows7.Multitouch.Manipulation.ManipulationDeltaEventArgs e)
{
double expectedv = _attachedElement.VerticalOffset - e.TranslationDelta.Height;
double expectedh = _attachedElement.HorizontalOffset - e.TranslationDelta.Width;
double actualv = Math.Min(_attachedElement.ScrollableHeight, Math.Max(0, expectedv));
double actualh = Math.Min(_attachedElement.ScrollableWidth, Math.Max(0, expectedh));
_attachedElement.ScrollToVerticalOffset(expectedv);
_attachedElement.ScrollToHorizontalOffset(expectedh);
_delta = new Vector(expectedh - actualh, expectedv - actualv);
}
//Update picture state
private void ProcessManipulationDelta(object sender, ManipulationDeltaEventArgs e)
{
if (Picture == null)
return;
Picture.X += e.TranslationDelta.Width;
Picture.Y += e.TranslationDelta.Height;
Picture.Angle += e.RotationDelta * 180 / Math.PI;
Picture.ScaleX *= e.ScaleDelta;
Picture.ScaleY *= e.ScaleDelta;
//Update inertia calculation. Take 40 percent from the previos data
_inertiaParam.Update(e, 0.4F);
}
//Update picture state
private void ProcessManipulationDelta(object sender, ManipulationDeltaEventArgs e)
{
if (Picture == null)
return;
Picture.Translate = new SizeF(Picture.Translate.Width + e.TranslationDelta.Width,
Picture.Translate.Height + e.TranslationDelta.Height);
Picture.Angle += e.RotationDelta * (float)( 180 / Math.PI);
Picture.ScalingFactor = new SizeF(Picture.ScalingFactor.Width * e.ScaleDelta, Picture.ScalingFactor.Height * e.ScaleDelta);
//Update inertia calculation. Take 40 percent from the previos data
_inertiaParam.Update(e, 0.4F);
_form.Invalidate();
}
/// <summary>
/// Handler for the touch events and gestures
/// </summary>
void ProcessManipulationDelta(object sender, Windows7.Multitouch.Manipulation.ManipulationDeltaEventArgs e)
{
attachedElement.ScrollToVerticalOffset(attachedElement.VerticalOffset - e.TranslationDelta.Height);
attachedElement.ScrollToHorizontalOffset(attachedElement.HorizontalOffset - e.TranslationDelta.Width);
}
private void UpdateValue(ManipulationDeltaEventArgs e)
{
Text = ((int)(_startValue + e.CumulativeTranslation.Width)).ToString();
}
