private void OnPointerMoved(object sender, Touch.PointerEventArgs e)
{
if (_currentScrollItem != null)
{
double dx = e.Position.X - _lastPosition.X;
double dy = e.Position.Y - _lastPosition.Y;
if (!_currentScrollItem.HorizontallyScrollable)
{
dx = 0;
}
if (!_currentScrollItem.VerticallyScrollable)
{
dy = 0;
}
Windows.UI.Xaml.Automation.ScrollAmount h = Windows.UI.Xaml.Automation.ScrollAmount.NoAmount;
Windows.UI.Xaml.Automation.ScrollAmount v = Windows.UI.Xaml.Automation.ScrollAmount.NoAmount;
if (dx < 0)
{
h = Windows.UI.Xaml.Automation.ScrollAmount.SmallIncrement;
}
else if (dx > 0)
{
h = Windows.UI.Xaml.Automation.ScrollAmount.SmallDecrement;
}
if (dy < 0)
{
v = Windows.UI.Xaml.Automation.ScrollAmount.SmallIncrement;
}
else if (dy > 0)
{
v = Windows.UI.Xaml.Automation.ScrollAmount.SmallDecrement;
}
_currentScrollItem.Scroll(h, v);
}
_lastPosition = e.Position;
}
private void OnPointerDown(object sender, Touch.PointerEventArgs e)
{
_currentScrollItem = FindElementsToInvoke(e.Position);
_lastPosition = e.Position;
}
private void OnPointerUp(object sender, Touch.PointerEventArgs e)
{
_currentScrollItem = null;
}
