private void Element_ManipulationCompleted(object sender, ManipulationCompletedEventArgs e)
{
if (!IsActive)
{
return;
}
IsActive = false;
_autoScrollTimer.Stop();
int dragIndex = GetDragIndex();
// fade in the list
_todoList.Animate(null, 1.0, FrameworkElement.OpacityProperty, 200, 0);
// animated the dragged item into location
double targetLocation = dragIndex * _dragImage.ActualHeight - _scrollViewer.VerticalOffset;
var trans = _dragImage.GetVerticalOffset().Transform;
trans.Animate(null, targetLocation, TranslateTransform.YProperty, 200, 0, null,
() =>
{
// move the dragged item
var draggedItem = _todoItems[_initialDragIndex];
_todoItems.Remove(draggedItem);
_todoItems.Insert(dragIndex, draggedItem);
// re-populate our ObservableCollection
RefreshView();
// fade out the dragged image and collapse on completion
_dragImage.Animate(null, 0.0, FrameworkElement.OpacityProperty, 1000, 0, null, ()
=> _dragImage.Visibility = Visibility.Collapsed);
});
}
private void HoldDelta(object sender, ManipulationDeltaEventArgs e)
{
if (!IsEnabled)
{
return;
}
if (!IsActive && !ShouldActivate(e))
{
return;
}
e.Handled = true;
if (!IsActive)
{
IsActive = true;
var relativePosition = _cardView.GetRelativePositionIn(_itemsControl);
PopoutCard(_cardView, _dragImage, relativePosition);
_dispatcherTimer.Start();
}
var dragTop = _dragImage.GetVerticalOffset().Value;
var dragMid = _dragImage.ActualHeight / 2;
var potentialY = dragTop + e.DeltaManipulation.Translation.Y;
if (potentialY <= 0)
{
potentialY = 0;
}
var potentialIntersect = potentialY + dragMid + _scrollViewer.VerticalOffset;
if (potentialIntersect <= 0)
{
potentialIntersect = 0;
}
var isDownward = e.DeltaManipulation.Translation.Y > 0;
if (!isDownward && dragTop <= 0)
{
potentialIntersect = 0;
}
var potentialIndex = GetPotentialIndex(_currentIndex, potentialIntersect, isDownward);
if (_currentIndex != potentialIndex)
{
// We only want to reindex if the index we've moved the card to
// has changed, based on hardcore maths.
_pointIndex.ShuffleItems(_currentIndex, potentialIndex);
_currentIndex = potentialIndex;
}
// Move the drag image
_dragImage.SetVerticalOffset(potentialY);
}
private void Element_ManipulationCompleted(object sender, ManipulationCompletedEventArgs e)
{
if (!IsActive)
{
return;
}
IsActive = false;
_autoScrollTimer.Stop();
int dragIndex = GetDragIndex();
// fade in the list
this.interactionListControl.Animate(null, 1.0, FrameworkElement.OpacityProperty, 200, 0);
// animated the dragged item into location
double targetLocation = dragIndex * _dragImage.ActualHeight - _scrollViewer.VerticalOffset;
var trans = _dragImage.GetVerticalOffset().Transform;
trans.Animate(null, targetLocation, TranslateTransform.YProperty, 200, 0, null,
() =>
{
// move the dragged item
var draggedItem = this.interactionList[_initialDragIndex];
this.itemManager.SetItemOrder(draggedItem, dragIndex == 0 ? null : this.interactionList[dragIndex - 1], dragIndex < this.interactionList.Count - 1 ? this.interactionList[dragIndex] : null, true);
//this.interactionList.RemoveAt(_initialDragIndex);
//this.interactionList.Add(draggedItem);
// re-populate our ObservableCollection
RefreshView();
// fade out the dragged image and collapse on completion
_dragImage.Animate(null, 0.0, FrameworkElement.OpacityProperty, 1000, 0, null, ()
=> _dragImage.Visibility = Visibility.Collapsed);
});
}