/// <summary>
/// Initialises a new instance of ComboTreeDropDown and associates it with its parent ComboTreeBox.
/// </summary>
/// <param name="sourceControl"></param>
public ComboTreeDropDown(ComboTreeBox sourceControl)
{
visibleItems = new List <NodeInfo>();
bitmaps = new Dictionary <BitmapInfo, Image>();
scrollBar = new ScrollBarInfo();
AutoSize = false;
this.sourceControl = sourceControl;
RenderMode = ToolStripRenderMode.System;
BackColor = Color.White;
dropDownHeight = 150;
itemHeight = MIN_ITEM_HEIGHT;
Items.Add("");
scrollRepeater = new Timer();
scrollRepeater.Tick += new EventHandler(scrollRepeater_Tick);
}
