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/*
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This Source Code Form is subject to the terms of the Mozilla Public
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License, v. 2.0. If a copy of the MPL was not distributed with this
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file, You can obtain one at http://mozilla.org/MPL/2.0/.
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Copyright (C) 2009-2010 Michael Möller <mmoeller@openhardwaremonitor.org>
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*/
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using System;
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using System.Collections.Generic;
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using System.Collections.ObjectModel;
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using System.Drawing;
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using Aga.Controls.Tree;
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namespace OpenHardwareMonitor.GUI {
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public class Node {
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private TreeModel treeModel;
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private Node parent;
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private NodeCollection nodes;
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private string text;
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private Image image;
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private bool visible;
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private TreeModel RootTreeModel() {
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Node node = this;
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while (node != null) {
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if (node.Model != null)
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return node.Model;
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node = node.parent;
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}
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return null;
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}
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public Node() : this(string.Empty) { }
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public Node(string text) {
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this.text = text;
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this.nodes = new NodeCollection(this);
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this.visible = true;
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}
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public TreeModel Model {
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get { return treeModel; }
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set { treeModel = value; }
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}
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public Node Parent {
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get { return parent; }
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set {
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if (value != parent) {
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if (parent != null)
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parent.nodes.Remove(this);
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if (value != null)
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value.nodes.Add(this);
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}
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}
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}
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public Collection<Node> Nodes {
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get { return nodes; }
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}
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public virtual string Text {
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get { return text; }
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set {
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if (text != value) {
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text = value;
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}
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}
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}
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public Image Image {
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get { return image; }
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set {
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if (image != value) {
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image = value;
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}
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}
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}
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public virtual bool IsVisible {
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get { return visible; }
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set {
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if (value != visible) {
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visible = value;
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TreeModel model = RootTreeModel();
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if (model != null && parent != null) {
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int index = 0;
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for (int i = 0; i < parent.nodes.Count; i++) {
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Node node = parent.nodes[i];
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if (node == this)
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break;
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if (node.IsVisible || model.ForceVisible)
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index++;
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}
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if (model.ForceVisible) {
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model.OnNodeChanged(parent, index, this);
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} else {
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if (value)
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model.OnNodeInserted(parent, index, this);
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else
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model.OnNodeRemoved(parent, index, this);
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}
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}
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if (IsVisibleChanged != null)
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IsVisibleChanged(this);
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}
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}
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}
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public delegate void NodeEventHandler(Node node);
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public event NodeEventHandler IsVisibleChanged;
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public event NodeEventHandler NodeAdded;
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public event NodeEventHandler NodeRemoved;
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private class NodeCollection : Collection<Node> {
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private Node owner;
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public NodeCollection(Node owner) {
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this.owner = owner;
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}
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protected override void ClearItems() {
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while (this.Count != 0)
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this.RemoveAt(this.Count - 1);
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}
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protected override void InsertItem(int index, Node item) {
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if (item == null)
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throw new ArgumentNullException("item");
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if (item.parent != owner) {
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if (item.parent != null)
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item.parent.nodes.Remove(item);
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item.parent = owner;
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base.InsertItem(index, item);
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TreeModel model = owner.RootTreeModel();
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if (model != null)
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model.OnStructureChanged(owner);
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if (owner.NodeAdded != null)
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owner.NodeAdded(item);
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}
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}
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protected override void RemoveItem(int index) {
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Node item = this[index];
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item.parent = null;
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base.RemoveItem(index);
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TreeModel model = owner.RootTreeModel();
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if (model != null)
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model.OnStructureChanged(owner);
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if (owner.NodeRemoved != null)
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owner.NodeRemoved(item);
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}
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protected override void SetItem(int index, Node item) {
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if (item == null)
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throw new ArgumentNullException("item");
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RemoveAt(index);
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InsertItem(index, item);
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}
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}
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}
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}
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