After a long time a solution for this problem was found. first of we need some variables
private TouchPoint _movePoint;
private double _minimum = 0;
private double _maximum;
Me need to catch the TouchMove event of the listBox. This event triggers many times. We need get maximum and minimum Y-values of were the touch has been.
private void myListBox_TouchMove(object sender, TouchEventArgs e)
{
_movePoint := e.GetTouchPoint(myListBox);
if (_minimum.Equals(0))
{
_minimum := _movePoint.Position.Y;
_maximum := _movePoint.Position.Y;
return;
}
if (_movePoint.Position.Y < _minimum)
_minimum := _movePoint.Position.Y;
if (_movePoint.Position.Y > _maximum)
_maximum := _movePoint.Position.Y;
}
Now in the TouchUp event we look at the how far have been slided in the vertical direction. If this is not to big (in this example lower then 20), we gonna look at where the touchup event took place and look for the ListBoxItem that is on that place and set IsSelected=ture on this item.
private void myListBox_TouchUp(object sender, TouchEventArgs e)
{
var difference = _maximum - _minimum;
_maximum = 0;
_minimum=0;
if(difference < 20)
{
var touchPosition = e.GetTouchPoint(myListBox)
UIElement elem = myListBox.InputHitTest(touchPosition.Position) as UIElement;
while (elem != null)
{
if (elem == myListBox)
return;
ListBoxItem item = elem as ListBoxItem;
if (item != null)
{
item.IsSelected = true;
return;
}
elem = VisualTreeHelper.GetParent(elem) as UIElement;
}
}
}
This should work.