/// <summary>
/// Gets the Tumbler (grid) that currently contains the mouse. Useful for forwarding mouse events to the specific tumbler.
/// </summary>
/// <returns>the Grid (itemsGrid) that contains the mouse pointer</returns>
private Grid getTargetTumbler()
{
Grid targetTumbler = null;
for (int i = 0; i < this.Tumblers.Count; ++i)
{
Border foundTumbler = this.mainGrid.FindChild <Border>("tumblerBorder", i);
if (foundTumbler != null && foundTumbler.ContainsMouse())
{
targetTumbler = foundTumbler.FindChild <Grid>("itemsGrid", 0);
break;
}
}
return(targetTumbler);
}