SidebarLibrary.WinControls.OutlookBar.DrawDropLine C# (CSharp) 메소드

		void DrawDropLine(Graphics g, int index, bool drawLine, HitTestType hit)
		{
			Brush brush = null;
			Pen pen = null;
			try
			{
				if (drawLine)
				{
					droppedPosition = index;
					lastDrawnLineIndex = index;
					brush = SystemBrushes.ControlText;
					pen = SystemPens.ControlText;
				}
				else
				{
					// If there is nothing painted, no need to erase
					if (lastDrawnLineIndex == -1)
						return;

					index = lastDrawnLineIndex;
					brush = new SolidBrush(bands[currentBandIndex].Background);
					pen = new Pen(bands[currentBandIndex].Background);
					lastDrawnLineIndex = -1;
				}

				int itemsCount = bands[currentBandIndex].Items.Count;
				Rectangle itemRect = GetItemRect(g, bands[currentBandIndex], index, Rectangle.Empty);

				Rectangle viewPortRect = GetViewPortRect();
				int y;
				if (bands[currentBandIndex].IconView == IconView.Small)
					y = itemRect.Top - Y_SMALLICON_SPACING / 2;
				else
					y = itemRect.Top - Y_LARGEICON_SPACING;

				if (hit == HitTestType.DropLineLastItem)
				{
					// use the bottom of the label if dealing with the last item
					Rectangle labelRect = GetLabelRect(itemsCount - 1);
					y = labelRect.Bottom + Y_LARGEICON_SPACING;
					paintedDropLineLastItem = true;
					// the none existing item index
					droppedPosition = itemsCount;
				}
				else if (paintedDropLineLastItem)
				{
					Rectangle labelRect = GetLabelRect(itemsCount - 1);
					y = labelRect.Bottom + Y_LARGEICON_SPACING;
					paintedDropLineLastItem = false;
				}

				// If we are using a bitmap background, erase
				// by painting the portion of the bitmap background
				if (backgroundBitmap != null && lastDrawnLineIndex == -1)
				{
					Rectangle rcStrip = new Rectangle(viewPortRect.Left, y - 6, viewPortRect.Width, 12);
					g.DrawImage(backgroundBitmap, rcStrip, rcStrip, GraphicsUnit.Pixel);
					return;
				}

				// Draw horizontal line
				Point p1 = new Point(viewPortRect.Left + 11, y);
				Point p2 = new Point(viewPortRect.Right - 11, y);
				g.DrawLine(pen, p1, p2);

				// Draw left triangle
				Point top;
				Point bottom;
				if (index == firstItem)
					top = new Point(viewPortRect.Left + 5, y);
				else
					top = new Point(viewPortRect.Left + 5, y - 6);

				if (hit == HitTestType.DropLineLastItem)
					bottom = new Point(viewPortRect.Left + 5, y + 1);
				else
					bottom = new Point(viewPortRect.Left + 5, y + 6);

				Point middle = new Point(viewPortRect.Left + 11, y);
				Point[] points = new Point[3];
				points.SetValue(top, 0);
				points.SetValue(middle, 1);
				points.SetValue(bottom, 2);
				g.FillPolygon(brush, points);

				// Draw right triangle
				if (index == firstItem)
					top = new Point(viewPortRect.Right - 5, y);
				else
					top = new Point(viewPortRect.Right - 5, y - 6);

				if (hit == HitTestType.DropLineLastItem)
					bottom = new Point(viewPortRect.Right - 5, y + 1);
				else
					bottom = new Point(viewPortRect.Right - 5, y + 6);

				middle = new Point(viewPortRect.Right - 11, y);
				points.SetValue(top, 0);
				points.SetValue(middle, 1);
				points.SetValue(bottom, 2);
				g.FillPolygon(brush, points);
			}
			finally
			{
				if (!drawLine)
				{
					brush.Dispose();
					pen.Dispose();
				}
			}
		}