ICSharpCode.TextEditor.Gui.CompletionWindow.CodeCompletionListView.SelectIndex C# (CSharp) Method

		public void SelectIndex(int index)
		{
			int oldSelectedItem = selectedItem;
			int oldFirstItem    = firstItem;
			
			index = Math.Max(0, index);
			selectedItem = Math.Max(0, Math.Min(completionData.Length - 1, index));
			if (selectedItem < firstItem) {
				FirstItem = selectedItem;
			}
			if (firstItem + MaxVisibleItem <= selectedItem) {
				FirstItem = selectedItem - MaxVisibleItem + 1;
			}
			if (oldSelectedItem != selectedItem) {
				if (firstItem != oldFirstItem) {
					Invalidate();
				} else {
					int min = Math.Min(selectedItem, oldSelectedItem) - firstItem;
					int max = Math.Max(selectedItem, oldSelectedItem) - firstItem;
					Invalidate(new Rectangle(0, 1 + min * ItemHeight, Width, (max - min + 1) * ItemHeight));
				}
				OnSelectedItemChanged(EventArgs.Empty);
			}
		}
		

		protected override bool ProcessTextAreaKey(Keys keyData)
		{
			if (!Visible) {
				return false;
			}
			
			switch (keyData) {
				case Keys.Home:
					codeCompletionListView.SelectIndex(0);
					return true;
				case Keys.End:
					codeCompletionListView.SelectIndex(completionData.Length-1);
					return true;
				case Keys.PageDown:
					codeCompletionListView.PageDown();
					return true;
				case Keys.PageUp:
					codeCompletionListView.PageUp();
					return true;
				case Keys.Down:
					codeCompletionListView.SelectNextItem();
					return true;
				case Keys.Up:
					codeCompletionListView.SelectPrevItem();
					return true;
				case Keys.Tab:
					InsertSelectedItem('\t');
					return true;
				case Keys.Return:
					InsertSelectedItem('\n');
					return true;
			}
			return base.ProcessTextAreaKey(keyData);
		}