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