public DynamicFiltersLegendControl()
{
// Start with empty collections of filter track bars.
ICollection<IDynamicFilterRangeTrackBar> oEmptyCollection =
CreateEmptyCollection();
m_oEdgeDynamicFilterRangeTrackBars =
m_oVertexDynamicFilterRangeTrackBars = oEmptyCollection;
this.DoubleBuffered = true;
this.BackColor = SystemColors.Window;
Debug.Assert(MinimumSelectedLineWidth % 2 == 0);
AssertValid();
}