private void ResizeMappedSignals()
{
if (mappedSignals.ColumnCount > 0)
{
int a = mappedSignals.Columns[2].Width = (int) ( mappedSignals.Width*.35 );
int b = mappedSignals.Columns[3].Width = (int) ( mappedSignals.Width*.20 );
mappedSignals.Columns[4].Width = mappedSignals.Width - ( a + b + 2 );
}
}