1 files changed, 152 insertions, 0 deletions
diff --git a/source/ShiftUI/ListView/ListViewInsertionMark.cs b/source/ShiftUI/ListView/ListViewInsertionMark.cs
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+++ b/source/ShiftUI/ListView/ListViewInsertionMark.cs
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+// Permission is hereby granted, free of charge, to any person obtaining
+// a copy of this software and associated documentation files (the
+// "Software"), to deal in the Software without restriction, including
+// without limitation the rights to use, copy, modify, merge, publish,
+// distribute, sublicense, and/or sell copies of the Software, and to
+// permit persons to whom the Software is furnished to do so, subject to
+// the following conditions:
+// 
+// The above copyright notice and this permission notice shall be
+// included in all copies or substantial portions of the Software.
+// 
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+//
+// Copyright (c) 2007 Novell, Inc. (http://www.novell.com)
+//
+// Authors:
+// 	Carlos Alberto Cortez <[email protected]>
+//
+
+
+using System;
+using System.Drawing;
+
+namespace ShiftUI
+{
+	public sealed class ListViewInsertionMark 
+	{
+		ListView listview_owner;
+		bool appears_after_item;
+		Rectangle bounds;
+		Color? color;
+		int index = 0;
+
+		internal ListViewInsertionMark (ListView listview)
+		{
+			listview_owner = listview;
+		}
+
+		public bool AppearsAfterItem {
+			get {
+				return appears_after_item;
+			}
+			set {
+				if (value == appears_after_item)
+					return;
+
+				appears_after_item = value;
+
+				listview_owner.item_control.Invalidate (bounds);
+				UpdateBounds ();
+				listview_owner.item_control.Invalidate (bounds);
+			}
+		}
+
+		public Rectangle Bounds {
+			get {
+				return bounds;
+			}
+		}
+
+		public Color Color {
+			get {
+				return color == null ? listview_owner.ForeColor : color.Value;
+			}
+			set {
+				color = value;
+			}
+		}
+
+		public int Index {
+			get {
+				return index;
+			}
+			set {
+				if (value == index)
+					return;
+
+				index = value;
+
+				listview_owner.item_control.Invalidate (bounds);
+				UpdateBounds ();
+				listview_owner.item_control.Invalidate (bounds);
+			}
+		}
+
+		void UpdateBounds ()
+		{
+			if (index < 0 || index >= listview_owner.Items.Count) {
+				bounds = Rectangle.Empty;
+				return;
+			}
+
+			Rectangle item_bounds = listview_owner.Items [index].Bounds;
+			int x_origin = (appears_after_item ? item_bounds.Right : item_bounds.Left) - 2;
+			int height = item_bounds.Height + ThemeEngine.Current.ListViewVerticalSpacing;
+
+			bounds = new Rectangle (x_origin, item_bounds.Top, 7, height);
+		}
+
+		public int NearestIndex (Point pt)
+		{
+			double distance = Double.MaxValue;
+			int nearest = -1;
+
+			for (int i = 0; i < listview_owner.Items.Count; i++) {
+				Point pos = listview_owner.GetItemLocation (i);
+				double d = Math.Pow (pos.X - pt.X, 2) + Math.Pow (pos.Y - pt.Y, 2);
+				if (d < distance) {
+					distance = d;
+					nearest = i;
+				}
+			}
+
+			if (listview_owner.item_control.dragged_item_index == nearest)
+				return -1;
+
+			return nearest;
+		}
+
+		internal PointF [] TopTriangle {
+			get {
+				PointF p1 = new PointF (bounds.X, bounds.Y);
+				PointF p2 = new PointF (bounds.Right, bounds.Y);
+				PointF p3 = new PointF (bounds.X + (bounds.Right - bounds.X) / 2, bounds.Y + 5);
+
+				return new PointF [] {p1, p2, p3};
+			}
+		}
+
+		internal PointF [] BottomTriangle {
+			get {
+				PointF p1 = new PointF (bounds.X, bounds.Bottom);
+				PointF p2 = new PointF (bounds.Right, bounds.Bottom);
+				PointF p3 = new PointF (bounds.X + (bounds.Right - bounds.X) / 2, bounds.Bottom - 5);
+
+				return new PointF [] {p1, p2, p3};
+			}
+		}
+
+		internal Rectangle Line {
+			get {
+				return new Rectangle (bounds.X + 2, bounds.Y + 2, 2, bounds.Height - 5);
+			}
+		}
+	}
+}