private void OnGestureCompleted(object sender, GestureEventArgs e)
{
if (_isDragging)
{
var args = new DragCompletedGestureEventArgs(
new Point(0.0, 0.0),
new Point(0.0, 0.0),
new Point(0.0, 0.0),
Orientation.Vertical,
new Point(0.0, 0.0));
if (_lastDragDeltaEventArgs != null)
{
args = new DragCompletedGestureEventArgs(
new Point(0.0, 0.0),
new Point(0.0, 0.0),
new Point(_lastDragDeltaEventArgs.HorizontalChange, _lastDragDeltaEventArgs.VerticalChange),
_lastDragDeltaEventArgs.Direction,
new Point(0.0, 0.0));
}
_isDragging = false;
OnDragCompleted(sender, args);
}
}
private void OnTap(object sender, GestureEventArgs e)
{
if (!IsEnabled)
{
return;
}
RaiseTap(e);
}
protected virtual void RaiseTap(GestureEventArgs e)
{
var handler = Tap;
if (handler != null)
{
handler(this, e);
}
}
private void OnDoubleTap(object sender, GestureEventArgs e)
{
if (!IsEnabled)
{
return;
}
if (!CanZoom)
{
return;
}
if (CurrentScaleX > 1.0 || CurrentScaleY > 1.0)
{
var frameworkElement = sender as FrameworkElement;
var transform = frameworkElement.RenderTransform as CompositeTransform;
AnimateTransform(transform, 0.0, 0.0, 1.0, 1.0);
CurrentScaleX = 1.0;
CurrentScaleY = 1.0;
}
else
{
var frameworkElement = sender as FrameworkElement;
var transform = frameworkElement.RenderTransform as CompositeTransform;
var a = transform.Transform(e.GetPosition(frameworkElement)); // we need the points to be relative to the current transform
var b = transform.Transform(e.GetPosition(frameworkElement));
var scale = new CompositeTransform
{
CenterX = (a.X + b.X) / 2,
CenterY = (a.Y + b.Y) / 2,
ScaleX = 4.0,
ScaleY = 4.0
};
ConstrainToParentBounds(frameworkElement, scale);
var newTransform = ComposeScaleTranslate(transform, scale);
AnimateTransform(transform, newTransform.TranslateX, newTransform.TranslateY, newTransform.ScaleX, newTransform.ScaleY);
_old.CenterX = newTransform.CenterX;
_old.CenterY = newTransform.CenterY;
_old.TranslateX = newTransform.TranslateX;
_old.TranslateY = newTransform.TranslateY;
_old.ScaleX = newTransform.ScaleX;
_old.ScaleY = newTransform.ScaleY;
CurrentScaleX = _old.ScaleX;
CurrentScaleY = _old.ScaleY;
}
RaiseDoubleTap(e);
}
private void PanAndZoom_OnTap(object sender, GestureEventArgs e)
{
if (_handled)
{
_handled = false;
return;
}
if (ApplicationBar != null)
{
ApplicationBar.IsVisible = !ApplicationBar.IsVisible;
}
var animation = ApplicationPanel.Visibility == Visibility.Visible
? CloseApplicationPanelAnimation
: OpenApplicationPanelAnimation;
animation.Begin();
}
private void PanAndZoom_OnDoubleTap(object sender, GestureEventArgs e)
{
_tapHandled = true;
}
