Code:
/ Net / Net / 3.5.50727.3053 / DEVDIV / depot / DevDiv / releases / whidbey / netfxsp / ndp / fx / src / WinForms / Managed / System / WinForms / TreeNode.cs / 1 / TreeNode.cs
//------------------------------------------------------------------------------ //// Copyright (c) Microsoft Corporation. All rights reserved. // //----------------------------------------------------------------------------- /* */ namespace System.Windows.Forms { using System.Text; using System.Runtime.Serialization; using System.Runtime.Serialization.Formatters; using System.Runtime.InteropServices; using System.Runtime.Remoting; using System.Diagnostics; using System.Diagnostics.CodeAnalysis; using System.Security; using System.Security.Permissions; using System; using System.Drawing.Design; using System.Collections; using System.Globalization; using System.Windows.Forms; using System.ComponentModel; using System.IO; using System.Drawing; using Microsoft.Win32; ////// /// [ TypeConverterAttribute(typeof(TreeNodeConverter)), Serializable, DefaultProperty("Text"), SuppressMessage("Microsoft.Usage", "CA2240:ImplementISerializableCorrectly") ] public class TreeNode : MarshalByRefObject, ICloneable, ISerializable { private const int SHIFTVAL = 12; private const int CHECKED = 2 << SHIFTVAL; private const int UNCHECKED = 1 << SHIFTVAL; private const int ALLOWEDIMAGES = 14; //the threshold value used to optimize AddRange and Clear operations for a big number of nodes internal const int MAX_TREENODES_OPS = 200; // we use it to store font and color data in a minimal-memory-cost manner // ie. nodes which don't use fancy fonts or colors (ie. that use the TreeView settings for these) // will take up less memory than those that do. internal OwnerDrawPropertyBag propBag = null; internal IntPtr handle; internal string text; internal string name; // note: as the checked state of a node is user controlled, and this variable is simply for // state caching when a node hasn't yet been realized, you should use the Checked property to // find out the check state of a node, and not this member variable. //private bool isChecked = false; private const int TREENODESTATE_isChecked = 0x00000001; private System.Collections.Specialized.BitVector32 treeNodeState; private TreeNodeImageIndexer imageIndexer; private TreeNodeImageIndexer selectedImageIndexer; private TreeNodeImageIndexer stateImageIndexer; private string toolTipText = ""; private ContextMenu contextMenu = null; private ContextMenuStrip contextMenuStrip = null; internal bool nodesCleared = false; // We need a special way to defer to the TreeView's image // list for indexing purposes. internal class TreeNodeImageIndexer : ImageList.Indexer { private TreeNode owner; ////// Implements a node of a ///. /// /// public enum ImageListType { /// Default, /// State } private ImageListType imageListType; /// public TreeNodeImageIndexer(TreeNode node, ImageListType imageListType) { owner = node; this.imageListType = imageListType; } /// public override ImageList ImageList { get { if (owner.TreeView != null) { if (imageListType == ImageListType.State) { return owner.TreeView.StateImageList; } else { return owner.TreeView.ImageList; } } else { return null; } } set { Debug.Assert(false, "We should never set the image list"); } } } internal TreeNodeImageIndexer ImageIndexer { get { //Demand create the imageIndexer if (imageIndexer == null) { imageIndexer = new TreeNodeImageIndexer(this, TreeNodeImageIndexer.ImageListType.Default); } return imageIndexer; } } internal TreeNodeImageIndexer SelectedImageIndexer { get { //Demand create the imageIndexer if (selectedImageIndexer == null) { selectedImageIndexer = new TreeNodeImageIndexer(this, TreeNodeImageIndexer.ImageListType.Default); } return selectedImageIndexer; } } internal TreeNodeImageIndexer StateImageIndexer { get { //Demand create the imageIndexer if (stateImageIndexer == null) { stateImageIndexer = new TreeNodeImageIndexer(this, TreeNodeImageIndexer.ImageListType.State); } return stateImageIndexer; } } internal int index; // our index into our parents child array internal int childCount; internal TreeNode[] children; internal TreeNode parent; internal TreeView treeView; private bool expandOnRealization = false; private bool collapseOnRealization = false; private TreeNodeCollection nodes = null; object userData; private readonly static int insertMask = NativeMethods.TVIF_TEXT | NativeMethods.TVIF_IMAGE | NativeMethods.TVIF_SELECTEDIMAGE; /// /// /// Creates a TreeNode object. /// public TreeNode() { treeNodeState = new System.Collections.Specialized.BitVector32(); } internal TreeNode(TreeView treeView) : this() { this.treeView = treeView; } ////// /// Creates a TreeNode object. /// public TreeNode(string text) : this() { this.text = text; } ////// /// Creates a TreeNode object. /// public TreeNode(string text, TreeNode[] children) : this() { this.text = text; this.Nodes.AddRange(children); } ////// /// Creates a TreeNode object. /// public TreeNode(string text, int imageIndex, int selectedImageIndex) : this() { this.text = text; this.ImageIndexer.Index = imageIndex; this.SelectedImageIndexer.Index = selectedImageIndex; } ////// /// Creates a TreeNode object. /// public TreeNode(string text, int imageIndex, int selectedImageIndex, TreeNode[] children) : this() { this.text = text; this.ImageIndexer.Index = imageIndex; this.SelectedImageIndexer.Index = selectedImageIndex; this.Nodes.AddRange(children); } /** * Constructor used in deserialization */ ///// PM team has reviewed and decided on naming changes already [SuppressMessage("Microsoft.Naming", "CA1704:IdentifiersShouldBeSpelledCorrectly")] [ SuppressMessage("Microsoft.Usage", "CA2214:DoNotCallOverridableMethodsInConstructors") // Changing Deserialize to be non-virtual // would be a breaking change. ] protected TreeNode(SerializationInfo serializationInfo, StreamingContext context) : this() { Deserialize(serializationInfo, context); } /// /// /// The background color of this node. /// If null, the color used will be the default color from the TreeView control that this /// node is attached to /// [ SRCategory(SR.CatAppearance), SRDescription(SR.TreeNodeBackColorDescr) ] public Color BackColor { get { if (propBag==null) return Color.Empty; return propBag.BackColor; } set { // get the old value Color oldbk = this.BackColor; // If we're setting the color to the default again, delete the propBag if it doesn't contain // useful data. if (value.IsEmpty) { if (propBag!=null) { propBag.BackColor = Color.Empty; RemovePropBagIfEmpty(); } if (!oldbk.IsEmpty) InvalidateHostTree(); return; } // Not the default, so if necessary create a new propBag, and fill it with the backcolor if (propBag==null) propBag = new OwnerDrawPropertyBag(); propBag.BackColor = value; if (!value.Equals(oldbk)) InvalidateHostTree(); } } ////// /// The bounding rectangle for the node (text area only). The coordinates /// are relative to the upper left corner of the TreeView control. /// [Browsable(false)] public Rectangle Bounds { get { if (TreeView == null) { return Rectangle.Empty; } NativeMethods.RECT rc = new NativeMethods.RECT(); unsafe { *((IntPtr *) &rc.left) = Handle; } // wparam: 1=include only text, 0=include entire line if ((int)UnsafeNativeMethods.SendMessage(new HandleRef(TreeView, TreeView.Handle), NativeMethods.TVM_GETITEMRECT, 1, ref rc) == 0) { // This means the node is not visible // return Rectangle.Empty; } return Rectangle.FromLTRB(rc.left, rc.top, rc.right, rc.bottom); } } ////// /// The bounding rectangle for the node (full row). The coordinates /// are relative to the upper left corner of the TreeView control. /// internal Rectangle RowBounds { get { NativeMethods.RECT rc = new NativeMethods.RECT(); unsafe { *((IntPtr *) &rc.left) = Handle; } // wparam: 1=include only text, 0=include entire line if (TreeView == null) { return Rectangle.Empty; } if ((int)UnsafeNativeMethods.SendMessage(new HandleRef(TreeView, TreeView.Handle), NativeMethods.TVM_GETITEMRECT, 0, ref rc) == 0) { // This means the node is not visible // return Rectangle.Empty; } return Rectangle.FromLTRB(rc.left, rc.top, rc.right, rc.bottom); } } internal bool CheckedStateInternal { get { return treeNodeState[TREENODESTATE_isChecked]; } set { treeNodeState[TREENODESTATE_isChecked] = value; } } // Checked does sanity checking and fires Before/AfterCheck events, then forwards to this // property to get/set the actual checked value. internal bool CheckedInternal { get { return CheckedStateInternal; } set { CheckedStateInternal = value; if (handle == IntPtr.Zero) return; TreeView tv = TreeView; if (tv == null || !tv.IsHandleCreated) return; NativeMethods.TV_ITEM item = new NativeMethods.TV_ITEM(); item.mask = NativeMethods.TVIF_HANDLE | NativeMethods.TVIF_STATE; item.hItem = handle; item.stateMask = NativeMethods.TVIS_STATEIMAGEMASK; item.state |= value ? CHECKED : UNCHECKED; UnsafeNativeMethods.SendMessage(new HandleRef(tv, tv.Handle), NativeMethods.TVM_SETITEM, 0, ref item); } } ////// /// Indicates whether the node's checkbox is checked. /// [ SRCategory(SR.CatBehavior), SRDescription(SR.TreeNodeCheckedDescr), DefaultValue(false) ] public bool Checked { get { #if DEBUG if(handle != IntPtr.Zero) { NativeMethods.TV_ITEM item = new NativeMethods.TV_ITEM(); item.mask = NativeMethods.TVIF_HANDLE | NativeMethods.TVIF_STATE; item.hItem = handle; item.stateMask = NativeMethods.TVIS_STATEIMAGEMASK; UnsafeNativeMethods.SendMessage(new HandleRef(null, TreeView.Handle), NativeMethods.TVM_GETITEM, 0, ref item); Debug.Assert(!TreeView.CheckBoxes || ((item.state >> SHIFTVAL) > 1) == CheckedInternal, "isChecked on node '" + Name + "' did not match the state in TVM_GETITEM."); } #endif return CheckedInternal; } set { TreeView tv = TreeView; if (tv != null) { bool eventReturn = tv.TreeViewBeforeCheck(this, TreeViewAction.Unknown); if (!eventReturn) { CheckedInternal = value; tv.TreeViewAfterCheck(this, TreeViewAction.Unknown); } } else { CheckedInternal = value; } } } ////// /// The contextMenu associated with this tree node. The contextMenu /// will be shown when the user right clicks the mouse on the control. /// [ SRCategory(SR.CatBehavior), DefaultValue(null), SRDescription(SR.ControlContextMenuDescr) ] public virtual ContextMenu ContextMenu { get { return contextMenu; } set { contextMenu = value; } } ////// /// [ SRCategory(SR.CatBehavior), DefaultValue(null), SRDescription(SR.ControlContextMenuDescr) ] public virtual ContextMenuStrip ContextMenuStrip { get { return contextMenuStrip; } set { contextMenuStrip = value; } } ////// /// The first child node of this node. /// [Browsable(false)] public TreeNode FirstNode { get { if (childCount == 0) return null; return children[0]; } } private TreeNode FirstVisibleParent { get { TreeNode node = this; while (node != null && node.Bounds.IsEmpty) { node = node.Parent; } return node; } } ////// /// The foreground color of this node. /// If null, the color used will be the default color from the TreeView control that this /// node is attached to /// [ SRCategory(SR.CatAppearance), SRDescription(SR.TreeNodeForeColorDescr) ] public Color ForeColor { get { if (propBag == null) return Color.Empty; return propBag.ForeColor; } set { Color oldfc = this.ForeColor; // If we're setting the color to the default again, delete the propBag if it doesn't contain // useful data. if (value.IsEmpty) { if (propBag != null) { propBag.ForeColor = Color.Empty; RemovePropBagIfEmpty(); } if (!oldfc.IsEmpty) InvalidateHostTree(); return; } // Not the default, so if necessary create a new propBag, and fill it with the new forecolor if (propBag == null) propBag = new OwnerDrawPropertyBag(); propBag.ForeColor = value; if (!value.Equals(oldfc)) InvalidateHostTree(); } } ////// /// Returns the full path of this node. /// The path consists of the labels of each of the nodes from the root to this node, /// each separated by the pathSeperator. /// [Browsable(false)] public string FullPath { get { TreeView tv = TreeView; if (tv != null) { StringBuilder path = new StringBuilder(); GetFullPath(path, tv.PathSeparator); return path.ToString(); } else throw new InvalidOperationException(SR.GetString(SR.TreeNodeNoParent)); } } ////// /// The HTREEITEM handle associated with this node. If the handle /// has not yet been created, this will force handle creation. /// [Browsable(false)] public IntPtr Handle { get { if (handle == IntPtr.Zero) { TreeView.CreateControl(); // force handle creation } return handle; } } ////// /// The index of the image to be displayed when the node is in the unselected state. /// The image is contained in the ImageList referenced by the imageList property. /// [ Localizable(true), SRCategory(SR.CatBehavior), SRDescription(SR.TreeNodeImageIndexDescr), TypeConverterAttribute(typeof(TreeViewImageIndexConverter)), Editor("System.Windows.Forms.Design.ImageIndexEditor, " + AssemblyRef.SystemDesign, typeof(UITypeEditor)), RefreshProperties(RefreshProperties.Repaint), DefaultValue(-1), RelatedImageList("TreeView.ImageList") ] public int ImageIndex { get { return ImageIndexer.Index;} set { ImageIndexer.Index = value; UpdateNode(NativeMethods.TVIF_IMAGE); } } ////// /// The index of the image to be displayed when the node is in the unselected state. /// The image is contained in the ImageList referenced by the imageList property. /// [ Localizable(true), SRCategory(SR.CatBehavior), SRDescription(SR.TreeNodeImageKeyDescr), TypeConverterAttribute(typeof(TreeViewImageKeyConverter)), DefaultValue(""), Editor("System.Windows.Forms.Design.ImageIndexEditor, " + AssemblyRef.SystemDesign, typeof(UITypeEditor)), RefreshProperties(RefreshProperties.Repaint), RelatedImageList("TreeView.ImageList") ] public string ImageKey { get {return ImageIndexer.Key;} set { ImageIndexer.Key = value; UpdateNode(NativeMethods.TVIF_IMAGE); } } ////// /// Returns the position of this node in relation to its siblings /// [ SRCategory(SR.CatBehavior), SRDescription(SR.TreeNodeIndexDescr), ] public int Index { get { return index;} } ////// /// Specifies whether this node is being edited by the user. /// [Browsable(false)] public bool IsEditing { get { TreeView tv = TreeView; if (tv != null) return tv.editNode == this; return false; } } ////// /// Specifies whether this node is in the expanded state. /// [Browsable(false)] public bool IsExpanded { get { if (handle == IntPtr.Zero) { return expandOnRealization; } return(State & NativeMethods.TVIS_EXPANDED) != 0; } } ////// /// Specifies whether this node is in the selected state. /// [Browsable(false)] public bool IsSelected { get { if (handle == IntPtr.Zero) return false; return(State & NativeMethods.TVIS_SELECTED) != 0; } } ////// /// Specifies whether this node is visible. /// [Browsable(false)] public bool IsVisible { get { if (handle == IntPtr.Zero) return false; TreeView tv = TreeView; NativeMethods.RECT rc = new NativeMethods.RECT(); unsafe { *((IntPtr *) &rc.left) = Handle; } bool visible = ((int)UnsafeNativeMethods.SendMessage(new HandleRef(tv, tv.Handle), NativeMethods.TVM_GETITEMRECT, 1, ref rc) != 0); if (visible) { Size size = tv.ClientSize; visible = (rc.bottom > 0 && rc.right > 0 && rc.top < size.Height && rc.left < size.Width); } return visible; } } ////// /// The last child node of this node. /// [Browsable(false)] public TreeNode LastNode { get { if (childCount == 0) return null; return children[childCount-1]; } } ////// /// This denotes the depth of nesting of the treenode. /// [Browsable(false)] public int Level { get { if (this.Parent == null) { return 0; } else { return Parent.Level + 1; } } } ////// /// The next sibling node. /// [Browsable(false)] public TreeNode NextNode { get { if (index+1 < parent.Nodes.Count) { return parent.Nodes[index+1]; } else { return null; } } } ////// /// The next visible node. It may be a child, sibling, /// or a node from another branch. /// [Browsable(false)] public TreeNode NextVisibleNode { get { // TVGN_NEXTVISIBLE can only be sent if the specified node is visible. // So before sending, we check if this node is visible. If not, we find the first visible parent. // if (TreeView == null) { return null; } TreeNode node = FirstVisibleParent; if (node != null) { IntPtr next = UnsafeNativeMethods.SendMessage(new HandleRef(TreeView, TreeView.Handle), NativeMethods.TVM_GETNEXTITEM, NativeMethods.TVGN_NEXTVISIBLE, node.Handle); if (next != IntPtr.Zero) { return TreeView.NodeFromHandle(next); } } return null; } } ////// /// The font that will be used to draw this node /// If null, the font used will be the default font from the TreeView control that this /// node is attached to. /// NOTE: If the node font is larger than the default font from the TreeView control, then /// the node will be clipped. /// [ Localizable(true), SRCategory(SR.CatAppearance), SRDescription(SR.TreeNodeNodeFontDescr), DefaultValue(null) ] public Font NodeFont { get { if (propBag==null) return null; return propBag.Font; } set { Font oldfont = this.NodeFont; // If we're setting the font to the default again, delete the propBag if it doesn't contain // useful data. if (value==null) { if (propBag!=null) { propBag.Font = null; RemovePropBagIfEmpty(); } if (oldfont != null) InvalidateHostTree(); return; } // Not the default, so if necessary create a new propBag, and fill it with the font if (propBag==null) propBag = new OwnerDrawPropertyBag(); propBag.Font = value; if (!value.Equals(oldfont)) InvalidateHostTree(); } } ////// /// [ ListBindable(false), Browsable(false) ] public TreeNodeCollection Nodes { get { if (nodes == null) { nodes = new TreeNodeCollection(this); } return nodes; } } ///[To be supplied.] ////// /// Retrieves parent node. /// [Browsable(false)] public TreeNode Parent { get { TreeView tv = TreeView; // Don't expose the virtual root publicly if (tv != null && parent == tv.root) { return null; } return parent; } } ////// /// The previous sibling node. /// [Browsable(false)] public TreeNode PrevNode { get { //fixedIndex is used for perf. optimization in case of adding big ranges of nodes int currentInd = index; int fixedInd = parent.Nodes.FixedIndex; if (fixedInd > 0) { currentInd = fixedInd; } if (currentInd > 0 && currentInd <= parent.Nodes.Count) { return parent.Nodes[currentInd-1]; } else { return null; } } } ////// /// The next visible node. It may be a parent, sibling, /// or a node from another branch. /// [Browsable(false)] public TreeNode PrevVisibleNode { get { // TVGN_PREVIOUSVISIBLE can only be sent if the specified node is visible. // So before sending, we check if this node is visible. If not, we find the first visible parent. // TreeNode node = FirstVisibleParent; if (node != null) { if (TreeView == null) { return null; } IntPtr prev = UnsafeNativeMethods.SendMessage(new HandleRef(TreeView, TreeView.Handle), NativeMethods.TVM_GETNEXTITEM, NativeMethods.TVGN_PREVIOUSVISIBLE, node.Handle); if (prev != IntPtr.Zero) { return TreeView.NodeFromHandle(prev); } } return null; } } ////// /// The index of the image displayed when the node is in the selected state. /// The image is contained in the ImageList referenced by the imageList property. /// [ Localizable(true), SRCategory(SR.CatBehavior), SRDescription(SR.TreeNodeSelectedImageIndexDescr), TypeConverterAttribute(typeof(TreeViewImageIndexConverter)), DefaultValue(-1), RefreshProperties(RefreshProperties.Repaint), Editor("System.Windows.Forms.Design.ImageIndexEditor, " + AssemblyRef.SystemDesign, typeof(UITypeEditor)), RelatedImageList("TreeView.ImageList") ] public int SelectedImageIndex { get { return SelectedImageIndexer.Index; } set { SelectedImageIndexer.Index = value; UpdateNode(NativeMethods.TVIF_SELECTEDIMAGE); } } ////// /// The index of the image displayed when the node is in the selected state. /// The image is contained in the ImageList referenced by the imageList property. /// [ Localizable(true), SRCategory(SR.CatBehavior), SRDescription(SR.TreeNodeSelectedImageKeyDescr), TypeConverterAttribute(typeof(TreeViewImageKeyConverter)), DefaultValue(""), RefreshProperties(RefreshProperties.Repaint), Editor("System.Windows.Forms.Design.ImageIndexEditor, " + AssemblyRef.SystemDesign, typeof(UITypeEditor)), RelatedImageList("TreeView.ImageList") ] public string SelectedImageKey { get { return SelectedImageIndexer.Key; } set { SelectedImageIndexer.Key = value; UpdateNode(NativeMethods.TVIF_SELECTEDIMAGE); } } ////// /// Retrieve state bits for this node /// ///internal int State { get { if (handle == IntPtr.Zero) return 0; if (TreeView == null) { return 0; } NativeMethods.TV_ITEM item = new NativeMethods.TV_ITEM(); item.hItem = Handle; item.mask = NativeMethods.TVIF_HANDLE | NativeMethods.TVIF_STATE; item.stateMask = NativeMethods.TVIS_SELECTED | NativeMethods.TVIS_EXPANDED; UnsafeNativeMethods.SendMessage(new HandleRef(TreeView, TreeView.Handle), NativeMethods.TVM_GETITEM, 0, ref item); return item.state; } } /// /// /// The key of the StateImage that the user want to display. /// [ Localizable(true), SRCategory(SR.CatBehavior), SRDescription(SR.TreeNodeStateImageKeyDescr), TypeConverterAttribute(typeof(ImageKeyConverter)), DefaultValue(""), Editor("System.Windows.Forms.Design.ImageIndexEditor, " + AssemblyRef.SystemDesign, typeof(UITypeEditor)), RefreshProperties(RefreshProperties.Repaint), RelatedImageList("TreeView.StateImageList") ] public string StateImageKey { get { return StateImageIndexer.Key; } set { if (StateImageIndexer.Key != value) { StateImageIndexer.Key = value; if (treeView != null && !treeView.CheckBoxes) { UpdateNode(NativeMethods.TVIF_STATE); } } } } ////// /// [ Localizable(true), TypeConverterAttribute(typeof(NoneExcludedImageIndexConverter)), DefaultValue(-1), SRCategory(SR.CatBehavior), SRDescription(SR.TreeNodeStateImageIndexDescr), Editor("System.Windows.Forms.Design.ImageIndexEditor, " + AssemblyRef.SystemDesign, typeof(UITypeEditor)), RefreshProperties(RefreshProperties.Repaint), RelatedImageList("TreeView.StateImageList") ] public int StateImageIndex { get { return (treeView == null || treeView.StateImageList == null) ? -1:StateImageIndexer.Index; } set { if (value < -1 || value > ALLOWEDIMAGES) { throw new ArgumentOutOfRangeException("StateImageIndex", SR.GetString(SR.InvalidArgument, "StateImageIndex", (value).ToString(CultureInfo.CurrentCulture))); } StateImageIndexer.Index = value; if (treeView != null && !treeView.CheckBoxes) { UpdateNode(NativeMethods.TVIF_STATE); } } } //[To be supplied.] ////// [ SRCategory(SR.CatData), Localizable(false), Bindable(true), SRDescription(SR.ControlTagDescr), DefaultValue(null), TypeConverter(typeof(StringConverter)), ] public object Tag { get { return userData; } set { userData = value; } } /// /// /// The label text for the tree node /// [ Localizable(true), SRCategory(SR.CatAppearance), SRDescription(SR.TreeNodeTextDescr) ] public string Text { get { return text == null ? "" : text; } set { this.text = value; UpdateNode(NativeMethods.TVIF_TEXT); } } ////// /// The ToolTip text that will be displayed when the mouse hovers over the node. /// [ Localizable(false), SRCategory(SR.CatAppearance), SRDescription(SR.TreeNodeToolTipTextDescr), DefaultValue("") ] public string ToolTipText { get { return toolTipText; } set { toolTipText = value; } } ////// /// The name for the tree node - useful for indexing. /// [ SRCategory(SR.CatAppearance), SRDescription(SR.TreeNodeNodeNameDescr) ] public string Name { get { return name == null ? "" : name; } set { this.name = value; } } ////// /// Return the TreeView control this node belongs to. /// [Browsable(false)] public TreeView TreeView { get { if (treeView == null) treeView = FindTreeView(); return treeView; } } ////// /// Adds a new child node at the appropriate sorted position /// ///internal int AddSorted(TreeNode node) { int index = 0; int iMin, iLim, iT; string nodeText = node.Text; TreeView parentTreeView = TreeView; if (childCount > 0) { if (parentTreeView.TreeViewNodeSorter == null) { CompareInfo compare = Application.CurrentCulture.CompareInfo; // Optimize for the case where they're already sorted if (compare.Compare(children[childCount-1].Text, nodeText) <= 0) index = childCount; else { // Insert at appropriate sorted spot for (iMin = 0, iLim = childCount; iMin < iLim;) { iT = (iMin + iLim) / 2; if (compare.Compare(children[iT].Text, nodeText) <= 0) iMin = iT + 1; else iLim = iT; } index = iMin; } } else { IComparer sorter = parentTreeView.TreeViewNodeSorter; // Insert at appropriate sorted spot for (iMin = 0, iLim = childCount; iMin < iLim;) { iT = (iMin + iLim) / 2; if (sorter.Compare(children[iT] /*previous*/, node/*current*/) <= 0) iMin = iT + 1; else iLim = iT; } index = iMin; } } node.SortChildren(parentTreeView); InsertNodeAt(index, node); return index; } /// /// /// Returns a TreeNode object for the given HTREEITEM handle /// public static TreeNode FromHandle(TreeView tree, IntPtr handle) { // SECREVIEW: // Demand before we pass the TreeNode form handle. IntSecurity.ControlFromHandleOrLocation.Demand(); return tree.NodeFromHandle(handle); } private void SortChildren(TreeView parentTreeView) { // if (childCount > 0) { TreeNode[] newOrder = new TreeNode[childCount]; if (parentTreeView == null || parentTreeView.TreeViewNodeSorter == null) { CompareInfo compare = Application.CurrentCulture.CompareInfo; for (int i = 0; i < childCount; i++) { int min = -1; for (int j = 0; j < childCount; j++) { if (children[j] == null) continue; if (min == -1) { min = j; continue; } if (compare.Compare(children[j].Text, children[min].Text) <= 0) min = j; } Debug.Assert(min != -1, "Bad sorting"); newOrder[i] = children[min]; children[min] = null; newOrder[i].index = i; newOrder[i].SortChildren(parentTreeView); } children = newOrder; } else { IComparer sorter = parentTreeView.TreeViewNodeSorter; for (int i = 0; i < childCount; i++) { int min = -1; for (int j = 0; j < childCount; j++) { if (children[j] == null) continue; if (min == -1) { min = j; continue; } if (sorter.Compare(children[j] /*previous*/, children[min] /*current*/) <= 0) min = j; } Debug.Assert(min != -1, "Bad sorting"); newOrder[i] = children[min]; children[min] = null; newOrder[i].index = i; newOrder[i].SortChildren(parentTreeView); } children = newOrder; } } } ////// /// Initiate editing of the node's label. /// Only effective if LabelEdit property is true. /// public void BeginEdit() { if (handle != IntPtr.Zero) { TreeView tv = TreeView; if (tv.LabelEdit == false) throw new InvalidOperationException(SR.GetString(SR.TreeNodeBeginEditFailed)); if (!tv.Focused) tv.FocusInternal(); UnsafeNativeMethods.SendMessage(new HandleRef(tv, tv.Handle), NativeMethods.TVM_EDITLABEL, 0, handle); } } ////// Called by the tree node collection to clear all nodes. We optimize here if /// this is the root node. /// internal void Clear() { // This is a node that is a child of some other node. We have // to selectively remove children here. // bool isBulkOperation = false; TreeView tv = TreeView; try { if (tv != null) { tv.nodesCollectionClear = true; if (tv != null && childCount > MAX_TREENODES_OPS) { isBulkOperation = true; tv.BeginUpdate(); } } while(childCount > 0) { children[childCount - 1].Remove(true); } children = null; if (tv != null && isBulkOperation) { tv.EndUpdate(); } } finally { if (tv != null) { tv.nodesCollectionClear = false; } nodesCleared = true; } } ////// /// Clone the entire subtree rooted at this node. /// public virtual object Clone() { Type clonedType = this.GetType(); TreeNode node = null; if (clonedType == typeof(TreeNode)){ node = new TreeNode(text, ImageIndexer.Index, SelectedImageIndexer.Index); } else { // SECREVIEW : Late-binding does not represent a security thread, see bug#411899 for more info.. // node = (TreeNode)Activator.CreateInstance(clonedType); } node.Text = text; node.Name = name; node.ImageIndexer.Index = ImageIndexer.Index; node.SelectedImageIndexer.Index = SelectedImageIndexer.Index; node.StateImageIndexer.Index = StateImageIndexer.Index; node.ToolTipText = toolTipText; node.ContextMenu = contextMenu; node.ContextMenuStrip = contextMenuStrip; // only set the key if it's set to something useful if ( ! (string.IsNullOrEmpty(ImageIndexer.Key))) { node.ImageIndexer.Key = ImageIndexer.Key; } // only set the key if it's set to something useful if (!(string.IsNullOrEmpty(SelectedImageIndexer.Key))) { node.SelectedImageIndexer.Key = SelectedImageIndexer.Key; } // only set the key if it's set to something useful if (!(string.IsNullOrEmpty(StateImageIndexer.Key))) { node.StateImageIndexer.Key = StateImageIndexer.Key; } if (childCount > 0) { node.children = new TreeNode[childCount]; for (int i = 0; i < childCount; i++) node.Nodes.Add((TreeNode)children[i].Clone()); } // Clone properties // if (propBag != null) { node.propBag = OwnerDrawPropertyBag.Copy(propBag); } node.Checked = this.Checked; node.Tag = this.Tag; return node; } private void CollapseInternal(bool ignoreChildren) { TreeView tv = TreeView; bool setSelection = false; collapseOnRealization = false; expandOnRealization = false; if (tv == null || !tv.IsHandleCreated) { collapseOnRealization = true; return; } //terminating condition for recursion... // if (ignoreChildren) { DoCollapse(tv); } else { if (!ignoreChildren && childCount > 0) { // Virtual root should collapse all its children for (int i = 0; i < childCount; i++) { if (tv.SelectedNode == children[i]) { setSelection = true; } children[i].DoCollapse(tv); children[i].Collapse(); } } DoCollapse(tv); } if (setSelection) tv.SelectedNode = this; tv.Invalidate(); collapseOnRealization = false; } ////// /// Collapse the node ignoring its children while collapsing the parent /// public void Collapse(bool ignoreChildren) { CollapseInternal(ignoreChildren); } ////// /// Collapse the node. /// public void Collapse() { CollapseInternal(false); } ////// /// Windows TreeView doesn't send the proper notifications on collapse, so we do it manually. /// private void DoCollapse(TreeView tv) { if ((State & NativeMethods.TVIS_EXPANDED) != 0) { TreeViewCancelEventArgs e = new TreeViewCancelEventArgs(this, false, TreeViewAction.Collapse); tv.OnBeforeCollapse(e); if (!e.Cancel) { UnsafeNativeMethods.SendMessage(new HandleRef(tv, tv.Handle), NativeMethods.TVM_EXPAND, NativeMethods.TVE_COLLAPSE, Handle); tv.OnAfterCollapse(new TreeViewEventArgs(this)); } } } ////// /// protected virtual void Deserialize(SerializationInfo serializationInfo, StreamingContext context) { int childCount = 0; int imageIndex = -1; string imageKey = null; int selectedImageIndex = -1; string selectedImageKey = null; int stateImageIndex = -1; string stateImageKey = null; foreach (SerializationEntry entry in serializationInfo) { switch (entry.Name) { case "PropBag": // SEC propBag = (OwnerDrawPropertyBag)serializationInfo.GetValue(entry.Name, typeof(OwnerDrawPropertyBag)); break; case "Text": Text = serializationInfo.GetString(entry.Name); break; case "Name": Name = serializationInfo.GetString(entry.Name); break; case "IsChecked": CheckedStateInternal = serializationInfo.GetBoolean(entry.Name); break; case "ImageIndex": imageIndex = serializationInfo.GetInt32(entry.Name); break; case "SelectedImageIndex": selectedImageIndex = serializationInfo.GetInt32(entry.Name); break; case "ImageKey": imageKey = serializationInfo.GetString(entry.Name); break; case "SelectedImageKey": selectedImageKey= serializationInfo.GetString(entry.Name); break; case "StateImageKey": stateImageKey = serializationInfo.GetString(entry.Name); break; case "StateImageIndex": stateImageIndex = serializationInfo.GetInt32(entry.Name); break; case "ChildCount": childCount = serializationInfo.GetInt32(entry.Name); break; case "UserData": userData = entry.Value; break; } } // let imagekey take precidence if (imageKey != null) { ImageKey = imageKey; } else if (imageIndex != -1) { ImageIndex = imageIndex; } // let selectedimagekey take precidence if (selectedImageKey != null) { SelectedImageKey = selectedImageKey; } else if (selectedImageIndex != -1) { SelectedImageIndex = selectedImageIndex; } // let stateimagekey take precidence if (stateImageKey != null) { StateImageKey = stateImageKey; } else if (stateImageIndex != -1) { StateImageIndex = stateImageIndex; } if (childCount > 0) { TreeNode[] childNodes = new TreeNode[childCount]; for (int i = 0; i < childCount; i++) { // SEC childNodes[i] = (TreeNode)serializationInfo.GetValue("children" + i, typeof(TreeNode)); } Nodes.AddRange(childNodes); } } ///[To be supplied.] ////// /// Terminate the editing of any tree view item's label. /// public void EndEdit(bool cancel) { if (TreeView == null) { return; } UnsafeNativeMethods.SendMessage(new HandleRef(TreeView, TreeView.Handle), NativeMethods.TVM_ENDEDITLABELNOW, cancel?1:0, 0); } ////// /// Makes sure there is enough room to add n children /// ///internal void EnsureCapacity(int num) { Debug.Assert(num > 0,"required capacity can not be less than 1"); int size = num; if (size < 4) { size = 4; } if (children == null) { children = new TreeNode[size]; } else if (childCount + num > children.Length) { int newSize = childCount + num; if (num == 1) { newSize = childCount * 2; } TreeNode[] bigger = new TreeNode[newSize]; System.Array.Copy(children, 0, bigger, 0, childCount); children = bigger; } } /// /// /// Ensures the the node's StateImageIndex value is properly set. /// ///private void EnsureStateImageValue() { if (treeView == null) { return; } if (treeView.CheckBoxes && treeView.StateImageList != null) { if (!String.IsNullOrEmpty(this.StateImageKey)) { this.StateImageIndex = (this.Checked) ? 1 : 0; this.StateImageKey = treeView.StateImageList.Images.Keys[this.StateImageIndex]; } else { this.StateImageIndex = (this.Checked) ? 1 : 0; } } } /// /// /// Ensure that the node is visible, expanding nodes and scrolling the /// TreeView control as necessary. /// public void EnsureVisible() { if (TreeView == null) { return; } UnsafeNativeMethods.SendMessage(new HandleRef(TreeView, TreeView.Handle), NativeMethods.TVM_ENSUREVISIBLE, 0, Handle); } ////// /// Expand the node. /// public void Expand() { TreeView tv = TreeView; if (tv == null || !tv.IsHandleCreated) { expandOnRealization = true; return; } ResetExpandedState(tv); if (!IsExpanded) { UnsafeNativeMethods.SendMessage(new HandleRef(tv, tv.Handle), NativeMethods.TVM_EXPAND, NativeMethods.TVE_EXPAND, Handle); } expandOnRealization = false; } ////// /// Expand the node. /// public void ExpandAll() { Expand(); for (int i = 0; i < childCount; i++) { children[i].ExpandAll(); } } ////// /// Locate this tree node's containing tree view control by scanning /// up to the virtual root, whose treeView pointer we know to be /// correct /// internal TreeView FindTreeView() { TreeNode node = this; while (node.parent != null) node = node.parent; return node.treeView; } ////// /// Helper function for getFullPath(). /// private void GetFullPath(StringBuilder path, string pathSeparator) { if (parent != null) { parent.GetFullPath(path, pathSeparator); if (parent.parent != null) path.Append(pathSeparator); path.Append(this.text); } } ////// /// Returns number of child nodes. /// public int GetNodeCount(bool includeSubTrees) { int total = childCount; if (includeSubTrees) { for (int i = 0; i < childCount; i++) total += children[i].GetNodeCount(true); } return total; } ////// /// Helper function to add node at a given index after all validation has been done /// ///internal void InsertNodeAt(int index, TreeNode node) { EnsureCapacity(1); node.parent = this; node.index = index; for (int i = childCount; i > index; --i) { (children[i] = children[i-1]).index = i; } children[index] = node; childCount++; node.Realize(false); if (TreeView != null && node == TreeView.selectedNode) TreeView.SelectedNode = node; // communicate this to the handle } /// /// /// Invalidates the treeview control that is hosting this node /// private void InvalidateHostTree() { if (treeView != null && treeView.IsHandleCreated) treeView.Invalidate(); } ////// /// ///internal void Realize(bool insertFirst) { // Debug.assert(handle == 0, "Node already realized"); TreeView tv = TreeView; if (tv == null || !tv.IsHandleCreated) return; if (parent == null && !tv.IsUpdating() && Application.RenderWithVisualStyles) { tv.SendMessage(NativeMethods.WM_SETREDRAW, 0, 0); } try { if (parent != null) { // Never realize the virtual root if (tv.InvokeRequired) { throw new InvalidOperationException(SR.GetString(SR.InvalidCrossThreadControlCall)); } NativeMethods.TV_INSERTSTRUCT tvis = new NativeMethods.TV_INSERTSTRUCT(); tvis.item_mask = insertMask; tvis.hParent = parent.handle; TreeNode prev = PrevNode; if (insertFirst || prev == null) { tvis.hInsertAfter = (IntPtr)NativeMethods.TVI_FIRST; } else { tvis.hInsertAfter = prev.handle; // Debug.assert(tvis.hInsertAfter != 0); } tvis.item_pszText = Marshal.StringToHGlobalAuto(text); tvis.item_iImage = (ImageIndexer.ActualIndex == -1) ? tv.ImageIndexer.ActualIndex : ImageIndexer.ActualIndex; tvis.item_iSelectedImage = (SelectedImageIndexer.ActualIndex == -1) ? tv.SelectedImageIndexer.ActualIndex : SelectedImageIndexer.ActualIndex; tvis.item_mask = NativeMethods.TVIF_TEXT; tvis.item_stateMask = 0; tvis.item_state = 0; if (tv.CheckBoxes) { tvis.item_mask |= NativeMethods.TVIF_STATE; tvis.item_stateMask |= NativeMethods.TVIS_STATEIMAGEMASK; tvis.item_state |= CheckedInternal ? CHECKED : UNCHECKED; } else if (tv.StateImageList != null && StateImageIndexer.ActualIndex >= 0) { tvis.item_mask |= NativeMethods.TVIF_STATE; tvis.item_stateMask = NativeMethods.TVIS_STATEIMAGEMASK; tvis.item_state = ((StateImageIndexer.ActualIndex + 1) << SHIFTVAL); } if (tvis.item_iImage >= 0) tvis.item_mask |= NativeMethods.TVIF_IMAGE; if (tvis.item_iSelectedImage >= 0) tvis.item_mask |= NativeMethods.TVIF_SELECTEDIMAGE; // If you are editing when you add a new node, then the edit control // gets placed in the wrong place. You must restore the edit mode // asynchronously (PostMessage) after the add is complete // to get the expected behavior. // bool editing = false; IntPtr editHandle = UnsafeNativeMethods.SendMessage(new HandleRef(TreeView, TreeView.Handle), NativeMethods.TVM_GETEDITCONTROL, 0, 0); if (editHandle != IntPtr.Zero) { // currently editing... // editing = true; UnsafeNativeMethods.SendMessage(new HandleRef(TreeView, TreeView.Handle), NativeMethods.TVM_ENDEDITLABELNOW, 0 /* fCancel==FALSE */, 0); } handle = UnsafeNativeMethods.SendMessage(new HandleRef(TreeView, TreeView.Handle), NativeMethods.TVM_INSERTITEM, 0, ref tvis); tv.nodeTable[handle] = this; // Lets update the Lparam to the Handle .... UpdateNode(NativeMethods.TVIF_PARAM); Marshal.FreeHGlobal(tvis.item_pszText); if (editing) { UnsafeNativeMethods.PostMessage(new HandleRef(TreeView, TreeView.Handle), NativeMethods.TVM_EDITLABEL, IntPtr.Zero, handle); } SafeNativeMethods.InvalidateRect(new HandleRef(tv, tv.Handle), null, false); if (parent.nodesCleared && (insertFirst || prev == null) && !tv.Scrollable) { // We need to Redraw the TreeView ... // If and only If we are not scrollable ... // and this is the FIRST NODE to get added.. // This is Comctl quirk where it just doesn't draw // the first node after a Clear( ) if Scrollable == false. UnsafeNativeMethods.SendMessage(new HandleRef(TreeView, TreeView.Handle), NativeMethods.WM_SETREDRAW, 1, 0); nodesCleared = false; } } for (int i = childCount - 1; i >= 0; i--) children[i].Realize(true); // If node expansion was requested before the handle was created, // we can expand it now. if (expandOnRealization) { Expand(); } // If node collapse was requested before the handle was created, // we can expand it now. if (collapseOnRealization) { Collapse(); } } finally { if (!tv.IsUpdating() && parent == null && Application.RenderWithVisualStyles) { tv.SendMessage(NativeMethods.WM_SETREDRAW, -1, 0); } } } /// /// /// Remove this node from the TreeView control. Child nodes are also removed from the /// TreeView, but are still attached to this node. /// public void Remove() { Remove(true); } ////// /// ///internal void Remove(bool notify) { bool expanded = IsExpanded; // unlink our children // for (int i = 0; i < childCount; i++) children[i].Remove(false); // children = null; // unlink ourself if (notify && parent != null) { // the for loop below will always skip the indexed node if index == parent.ChildCount -1 // this will cause the Treeview to leak this Node. // so check that if (index == parent.childCount -1) { parent.children[index] = null; } for (int i = index; i < parent.childCount-1; ++i) { (parent.children[i] = parent.children[i+1]).index = i; } parent.childCount--; parent = null; } // Expand when we are realized the next time. expandOnRealization = expanded; // unrealize ourself if (TreeView == null) { return; } if (handle != IntPtr.Zero) { if (notify && TreeView.IsHandleCreated) UnsafeNativeMethods.SendMessage(new HandleRef(TreeView, TreeView.Handle), NativeMethods.TVM_DELETEITEM, 0, handle); treeView.nodeTable.Remove(handle); handle = IntPtr.Zero; } treeView = null; } /// /// /// Removes the propBag object if it's now devoid of useful data /// ///private void RemovePropBagIfEmpty() { if (propBag==null) return; if (propBag.IsEmpty()) propBag = null; return; } private void ResetExpandedState(TreeView tv) { Debug.Assert(tv.IsHandleCreated, "nonexistent handle"); NativeMethods.TV_ITEM item = new NativeMethods.TV_ITEM(); item.mask = NativeMethods.TVIF_HANDLE | NativeMethods.TVIF_STATE; item.hItem = handle; item.stateMask = NativeMethods.TVIS_EXPANDEDONCE; item.state = 0; UnsafeNativeMethods.SendMessage(new HandleRef(tv, tv.Handle), NativeMethods.TVM_SETITEM, 0, ref item); } private bool ShouldSerializeBackColor() { return BackColor != Color.Empty; } private bool ShouldSerializeForeColor() { return ForeColor != Color.Empty; } /// /// /// Saves this TreeNode object to the given data stream. /// /// Review: Changing this would break VB users. so suppresing this message. /// SECREVIEW: Since ISerializable.GetObjectData and Deserialize require SerializationFormatter - locking down. [SecurityPermissionAttribute(SecurityAction.Demand, Flags=SecurityPermissionFlag.SerializationFormatter), SecurityPermission(SecurityAction.InheritanceDemand, Flags=SecurityPermissionFlag.SerializationFormatter)] [SuppressMessage("Microsoft.Naming", "CA1704:IdentifiersShouldBeSpelledCorrectly")] protected virtual void Serialize(SerializationInfo si, StreamingContext context) { if (propBag != null) { si.AddValue("PropBag", propBag, typeof(OwnerDrawPropertyBag)); } si.AddValue("Text", text); si.AddValue("Name", Name); si.AddValue("IsChecked", treeNodeState[TREENODESTATE_isChecked]); si.AddValue("ImageIndex", ImageIndexer.Index); si.AddValue("ImageKey", ImageIndexer.Key); si.AddValue("SelectedImageIndex", SelectedImageIndexer.Index); si.AddValue("SelectedImageKey", SelectedImageIndexer.Key); if (this.treeView != null && this.treeView.StateImageList != null) { si.AddValue("StateImageIndex", StateImageIndexer.Index); } if (this.treeView != null && this.treeView.StateImageList != null) { si.AddValue("StateImageKey", StateImageIndexer.Key); } si.AddValue("ChildCount", childCount); if (childCount > 0) { for (int i = 0; i < childCount; i++) { si.AddValue("children" + i, children[i], typeof(TreeNode)); } } if (userData != null && userData.GetType().IsSerializable) { si.AddValue("UserData", userData, userData.GetType()); } } ////// /// Toggle the state of the node. Expand if collapsed or collapse if /// expanded. /// public void Toggle() { Debug.Assert(parent != null, "toggle on virtual root"); // I don't use the TVE_TOGGLE message 'cuz Windows TreeView doesn't send the appropriate // notifications when collapsing. if (IsExpanded) { Collapse(); } else { Expand(); } } ////// /// Returns the label text for the tree node /// public override string ToString() { return "TreeNode: " + (text == null ? "" : text); } ////// /// Tell the TreeView to refresh this node /// private void UpdateNode(int mask) { if (handle == IntPtr.Zero) return; TreeView tv = TreeView; Debug.Assert(tv != null, "TreeNode has handle but no TreeView"); NativeMethods.TV_ITEM item = new NativeMethods.TV_ITEM(); item.mask = NativeMethods.TVIF_HANDLE | mask; item.hItem = handle; if ((mask & NativeMethods.TVIF_TEXT) != 0) item.pszText = Marshal.StringToHGlobalAuto(text); if ((mask & NativeMethods.TVIF_IMAGE) != 0) item.iImage = (ImageIndexer.ActualIndex == -1) ? tv.ImageIndexer.ActualIndex : ImageIndexer.ActualIndex; if ((mask & NativeMethods.TVIF_SELECTEDIMAGE) != 0) item.iSelectedImage = (SelectedImageIndexer.ActualIndex == -1) ? tv.SelectedImageIndexer.ActualIndex : SelectedImageIndexer.ActualIndex; if ((mask & NativeMethods.TVIF_STATE) != 0) { item.stateMask = NativeMethods.TVIS_STATEIMAGEMASK; if (StateImageIndexer.ActualIndex != -1) { item.state = ((StateImageIndexer.ActualIndex + 1) << SHIFTVAL); } // VSWhidbey 143401: ActualIndex == -1 means "don't use custom image list" // so just leave item.state set to zero, that tells the unmanaged control // to use no state image for this node. } if ((mask & NativeMethods.TVIF_PARAM) != 0) { item.lParam = handle; } UnsafeNativeMethods.SendMessage(new HandleRef(tv, tv.Handle), NativeMethods.TVM_SETITEM, 0, ref item); if ((mask & NativeMethods.TVIF_TEXT) != 0) { Marshal.FreeHGlobal(item.pszText); if (tv.Scrollable) tv.ForceScrollbarUpdate(false); } } internal void UpdateImage () { NativeMethods.TV_ITEM item = new NativeMethods.TV_ITEM(); item.mask = NativeMethods.TVIF_HANDLE | NativeMethods.TVIF_IMAGE; item.hItem = Handle; item.iImage = Math.Max(0, ((ImageIndexer.ActualIndex >= TreeView.ImageList.Images.Count) ? TreeView.ImageList.Images.Count - 1 : ImageIndexer.ActualIndex)); UnsafeNativeMethods.SendMessage(new HandleRef(TreeView, TreeView.Handle), NativeMethods.TVM_SETITEM, 0, ref item); } ////// /// ISerializable private implementation /// ///[SecurityPermissionAttribute(SecurityAction.LinkDemand, Flags=SecurityPermissionFlag.SerializationFormatter)] void ISerializable.GetObjectData(SerializationInfo si, StreamingContext context) { Serialize(si, context); } } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007. //------------------------------------------------------------------------------ // // Copyright (c) Microsoft Corporation. All rights reserved. // //----------------------------------------------------------------------------- /* */ namespace System.Windows.Forms { using System.Text; using System.Runtime.Serialization; using System.Runtime.Serialization.Formatters; using System.Runtime.InteropServices; using System.Runtime.Remoting; using System.Diagnostics; using System.Diagnostics.CodeAnalysis; using System.Security; using System.Security.Permissions; using System; using System.Drawing.Design; using System.Collections; using System.Globalization; using System.Windows.Forms; using System.ComponentModel; using System.IO; using System.Drawing; using Microsoft.Win32; ////// /// [ TypeConverterAttribute(typeof(TreeNodeConverter)), Serializable, DefaultProperty("Text"), SuppressMessage("Microsoft.Usage", "CA2240:ImplementISerializableCorrectly") ] public class TreeNode : MarshalByRefObject, ICloneable, ISerializable { private const int SHIFTVAL = 12; private const int CHECKED = 2 << SHIFTVAL; private const int UNCHECKED = 1 << SHIFTVAL; private const int ALLOWEDIMAGES = 14; //the threshold value used to optimize AddRange and Clear operations for a big number of nodes internal const int MAX_TREENODES_OPS = 200; // we use it to store font and color data in a minimal-memory-cost manner // ie. nodes which don't use fancy fonts or colors (ie. that use the TreeView settings for these) // will take up less memory than those that do. internal OwnerDrawPropertyBag propBag = null; internal IntPtr handle; internal string text; internal string name; // note: as the checked state of a node is user controlled, and this variable is simply for // state caching when a node hasn't yet been realized, you should use the Checked property to // find out the check state of a node, and not this member variable. //private bool isChecked = false; private const int TREENODESTATE_isChecked = 0x00000001; private System.Collections.Specialized.BitVector32 treeNodeState; private TreeNodeImageIndexer imageIndexer; private TreeNodeImageIndexer selectedImageIndexer; private TreeNodeImageIndexer stateImageIndexer; private string toolTipText = ""; private ContextMenu contextMenu = null; private ContextMenuStrip contextMenuStrip = null; internal bool nodesCleared = false; // We need a special way to defer to the TreeView's image // list for indexing purposes. internal class TreeNodeImageIndexer : ImageList.Indexer { private TreeNode owner; ////// Implements a node of a ///. /// /// public enum ImageListType { /// Default, /// State } private ImageListType imageListType; /// public TreeNodeImageIndexer(TreeNode node, ImageListType imageListType) { owner = node; this.imageListType = imageListType; } /// public override ImageList ImageList { get { if (owner.TreeView != null) { if (imageListType == ImageListType.State) { return owner.TreeView.StateImageList; } else { return owner.TreeView.ImageList; } } else { return null; } } set { Debug.Assert(false, "We should never set the image list"); } } } internal TreeNodeImageIndexer ImageIndexer { get { //Demand create the imageIndexer if (imageIndexer == null) { imageIndexer = new TreeNodeImageIndexer(this, TreeNodeImageIndexer.ImageListType.Default); } return imageIndexer; } } internal TreeNodeImageIndexer SelectedImageIndexer { get { //Demand create the imageIndexer if (selectedImageIndexer == null) { selectedImageIndexer = new TreeNodeImageIndexer(this, TreeNodeImageIndexer.ImageListType.Default); } return selectedImageIndexer; } } internal TreeNodeImageIndexer StateImageIndexer { get { //Demand create the imageIndexer if (stateImageIndexer == null) { stateImageIndexer = new TreeNodeImageIndexer(this, TreeNodeImageIndexer.ImageListType.State); } return stateImageIndexer; } } internal int index; // our index into our parents child array internal int childCount; internal TreeNode[] children; internal TreeNode parent; internal TreeView treeView; private bool expandOnRealization = false; private bool collapseOnRealization = false; private TreeNodeCollection nodes = null; object userData; private readonly static int insertMask = NativeMethods.TVIF_TEXT | NativeMethods.TVIF_IMAGE | NativeMethods.TVIF_SELECTEDIMAGE; /// /// /// Creates a TreeNode object. /// public TreeNode() { treeNodeState = new System.Collections.Specialized.BitVector32(); } internal TreeNode(TreeView treeView) : this() { this.treeView = treeView; } ////// /// Creates a TreeNode object. /// public TreeNode(string text) : this() { this.text = text; } ////// /// Creates a TreeNode object. /// public TreeNode(string text, TreeNode[] children) : this() { this.text = text; this.Nodes.AddRange(children); } ////// /// Creates a TreeNode object. /// public TreeNode(string text, int imageIndex, int selectedImageIndex) : this() { this.text = text; this.ImageIndexer.Index = imageIndex; this.SelectedImageIndexer.Index = selectedImageIndex; } ////// /// Creates a TreeNode object. /// public TreeNode(string text, int imageIndex, int selectedImageIndex, TreeNode[] children) : this() { this.text = text; this.ImageIndexer.Index = imageIndex; this.SelectedImageIndexer.Index = selectedImageIndex; this.Nodes.AddRange(children); } /** * Constructor used in deserialization */ ///// PM team has reviewed and decided on naming changes already [SuppressMessage("Microsoft.Naming", "CA1704:IdentifiersShouldBeSpelledCorrectly")] [ SuppressMessage("Microsoft.Usage", "CA2214:DoNotCallOverridableMethodsInConstructors") // Changing Deserialize to be non-virtual // would be a breaking change. ] protected TreeNode(SerializationInfo serializationInfo, StreamingContext context) : this() { Deserialize(serializationInfo, context); } /// /// /// The background color of this node. /// If null, the color used will be the default color from the TreeView control that this /// node is attached to /// [ SRCategory(SR.CatAppearance), SRDescription(SR.TreeNodeBackColorDescr) ] public Color BackColor { get { if (propBag==null) return Color.Empty; return propBag.BackColor; } set { // get the old value Color oldbk = this.BackColor; // If we're setting the color to the default again, delete the propBag if it doesn't contain // useful data. if (value.IsEmpty) { if (propBag!=null) { propBag.BackColor = Color.Empty; RemovePropBagIfEmpty(); } if (!oldbk.IsEmpty) InvalidateHostTree(); return; } // Not the default, so if necessary create a new propBag, and fill it with the backcolor if (propBag==null) propBag = new OwnerDrawPropertyBag(); propBag.BackColor = value; if (!value.Equals(oldbk)) InvalidateHostTree(); } } ////// /// The bounding rectangle for the node (text area only). The coordinates /// are relative to the upper left corner of the TreeView control. /// [Browsable(false)] public Rectangle Bounds { get { if (TreeView == null) { return Rectangle.Empty; } NativeMethods.RECT rc = new NativeMethods.RECT(); unsafe { *((IntPtr *) &rc.left) = Handle; } // wparam: 1=include only text, 0=include entire line if ((int)UnsafeNativeMethods.SendMessage(new HandleRef(TreeView, TreeView.Handle), NativeMethods.TVM_GETITEMRECT, 1, ref rc) == 0) { // This means the node is not visible // return Rectangle.Empty; } return Rectangle.FromLTRB(rc.left, rc.top, rc.right, rc.bottom); } } ////// /// The bounding rectangle for the node (full row). The coordinates /// are relative to the upper left corner of the TreeView control. /// internal Rectangle RowBounds { get { NativeMethods.RECT rc = new NativeMethods.RECT(); unsafe { *((IntPtr *) &rc.left) = Handle; } // wparam: 1=include only text, 0=include entire line if (TreeView == null) { return Rectangle.Empty; } if ((int)UnsafeNativeMethods.SendMessage(new HandleRef(TreeView, TreeView.Handle), NativeMethods.TVM_GETITEMRECT, 0, ref rc) == 0) { // This means the node is not visible // return Rectangle.Empty; } return Rectangle.FromLTRB(rc.left, rc.top, rc.right, rc.bottom); } } internal bool CheckedStateInternal { get { return treeNodeState[TREENODESTATE_isChecked]; } set { treeNodeState[TREENODESTATE_isChecked] = value; } } // Checked does sanity checking and fires Before/AfterCheck events, then forwards to this // property to get/set the actual checked value. internal bool CheckedInternal { get { return CheckedStateInternal; } set { CheckedStateInternal = value; if (handle == IntPtr.Zero) return; TreeView tv = TreeView; if (tv == null || !tv.IsHandleCreated) return; NativeMethods.TV_ITEM item = new NativeMethods.TV_ITEM(); item.mask = NativeMethods.TVIF_HANDLE | NativeMethods.TVIF_STATE; item.hItem = handle; item.stateMask = NativeMethods.TVIS_STATEIMAGEMASK; item.state |= value ? CHECKED : UNCHECKED; UnsafeNativeMethods.SendMessage(new HandleRef(tv, tv.Handle), NativeMethods.TVM_SETITEM, 0, ref item); } } ////// /// Indicates whether the node's checkbox is checked. /// [ SRCategory(SR.CatBehavior), SRDescription(SR.TreeNodeCheckedDescr), DefaultValue(false) ] public bool Checked { get { #if DEBUG if(handle != IntPtr.Zero) { NativeMethods.TV_ITEM item = new NativeMethods.TV_ITEM(); item.mask = NativeMethods.TVIF_HANDLE | NativeMethods.TVIF_STATE; item.hItem = handle; item.stateMask = NativeMethods.TVIS_STATEIMAGEMASK; UnsafeNativeMethods.SendMessage(new HandleRef(null, TreeView.Handle), NativeMethods.TVM_GETITEM, 0, ref item); Debug.Assert(!TreeView.CheckBoxes || ((item.state >> SHIFTVAL) > 1) == CheckedInternal, "isChecked on node '" + Name + "' did not match the state in TVM_GETITEM."); } #endif return CheckedInternal; } set { TreeView tv = TreeView; if (tv != null) { bool eventReturn = tv.TreeViewBeforeCheck(this, TreeViewAction.Unknown); if (!eventReturn) { CheckedInternal = value; tv.TreeViewAfterCheck(this, TreeViewAction.Unknown); } } else { CheckedInternal = value; } } } ////// /// The contextMenu associated with this tree node. The contextMenu /// will be shown when the user right clicks the mouse on the control. /// [ SRCategory(SR.CatBehavior), DefaultValue(null), SRDescription(SR.ControlContextMenuDescr) ] public virtual ContextMenu ContextMenu { get { return contextMenu; } set { contextMenu = value; } } ////// /// [ SRCategory(SR.CatBehavior), DefaultValue(null), SRDescription(SR.ControlContextMenuDescr) ] public virtual ContextMenuStrip ContextMenuStrip { get { return contextMenuStrip; } set { contextMenuStrip = value; } } ////// /// The first child node of this node. /// [Browsable(false)] public TreeNode FirstNode { get { if (childCount == 0) return null; return children[0]; } } private TreeNode FirstVisibleParent { get { TreeNode node = this; while (node != null && node.Bounds.IsEmpty) { node = node.Parent; } return node; } } ////// /// The foreground color of this node. /// If null, the color used will be the default color from the TreeView control that this /// node is attached to /// [ SRCategory(SR.CatAppearance), SRDescription(SR.TreeNodeForeColorDescr) ] public Color ForeColor { get { if (propBag == null) return Color.Empty; return propBag.ForeColor; } set { Color oldfc = this.ForeColor; // If we're setting the color to the default again, delete the propBag if it doesn't contain // useful data. if (value.IsEmpty) { if (propBag != null) { propBag.ForeColor = Color.Empty; RemovePropBagIfEmpty(); } if (!oldfc.IsEmpty) InvalidateHostTree(); return; } // Not the default, so if necessary create a new propBag, and fill it with the new forecolor if (propBag == null) propBag = new OwnerDrawPropertyBag(); propBag.ForeColor = value; if (!value.Equals(oldfc)) InvalidateHostTree(); } } ////// /// Returns the full path of this node. /// The path consists of the labels of each of the nodes from the root to this node, /// each separated by the pathSeperator. /// [Browsable(false)] public string FullPath { get { TreeView tv = TreeView; if (tv != null) { StringBuilder path = new StringBuilder(); GetFullPath(path, tv.PathSeparator); return path.ToString(); } else throw new InvalidOperationException(SR.GetString(SR.TreeNodeNoParent)); } } ////// /// The HTREEITEM handle associated with this node. If the handle /// has not yet been created, this will force handle creation. /// [Browsable(false)] public IntPtr Handle { get { if (handle == IntPtr.Zero) { TreeView.CreateControl(); // force handle creation } return handle; } } ////// /// The index of the image to be displayed when the node is in the unselected state. /// The image is contained in the ImageList referenced by the imageList property. /// [ Localizable(true), SRCategory(SR.CatBehavior), SRDescription(SR.TreeNodeImageIndexDescr), TypeConverterAttribute(typeof(TreeViewImageIndexConverter)), Editor("System.Windows.Forms.Design.ImageIndexEditor, " + AssemblyRef.SystemDesign, typeof(UITypeEditor)), RefreshProperties(RefreshProperties.Repaint), DefaultValue(-1), RelatedImageList("TreeView.ImageList") ] public int ImageIndex { get { return ImageIndexer.Index;} set { ImageIndexer.Index = value; UpdateNode(NativeMethods.TVIF_IMAGE); } } ////// /// The index of the image to be displayed when the node is in the unselected state. /// The image is contained in the ImageList referenced by the imageList property. /// [ Localizable(true), SRCategory(SR.CatBehavior), SRDescription(SR.TreeNodeImageKeyDescr), TypeConverterAttribute(typeof(TreeViewImageKeyConverter)), DefaultValue(""), Editor("System.Windows.Forms.Design.ImageIndexEditor, " + AssemblyRef.SystemDesign, typeof(UITypeEditor)), RefreshProperties(RefreshProperties.Repaint), RelatedImageList("TreeView.ImageList") ] public string ImageKey { get {return ImageIndexer.Key;} set { ImageIndexer.Key = value; UpdateNode(NativeMethods.TVIF_IMAGE); } } ////// /// Returns the position of this node in relation to its siblings /// [ SRCategory(SR.CatBehavior), SRDescription(SR.TreeNodeIndexDescr), ] public int Index { get { return index;} } ////// /// Specifies whether this node is being edited by the user. /// [Browsable(false)] public bool IsEditing { get { TreeView tv = TreeView; if (tv != null) return tv.editNode == this; return false; } } ////// /// Specifies whether this node is in the expanded state. /// [Browsable(false)] public bool IsExpanded { get { if (handle == IntPtr.Zero) { return expandOnRealization; } return(State & NativeMethods.TVIS_EXPANDED) != 0; } } ////// /// Specifies whether this node is in the selected state. /// [Browsable(false)] public bool IsSelected { get { if (handle == IntPtr.Zero) return false; return(State & NativeMethods.TVIS_SELECTED) != 0; } } ////// /// Specifies whether this node is visible. /// [Browsable(false)] public bool IsVisible { get { if (handle == IntPtr.Zero) return false; TreeView tv = TreeView; NativeMethods.RECT rc = new NativeMethods.RECT(); unsafe { *((IntPtr *) &rc.left) = Handle; } bool visible = ((int)UnsafeNativeMethods.SendMessage(new HandleRef(tv, tv.Handle), NativeMethods.TVM_GETITEMRECT, 1, ref rc) != 0); if (visible) { Size size = tv.ClientSize; visible = (rc.bottom > 0 && rc.right > 0 && rc.top < size.Height && rc.left < size.Width); } return visible; } } ////// /// The last child node of this node. /// [Browsable(false)] public TreeNode LastNode { get { if (childCount == 0) return null; return children[childCount-1]; } } ////// /// This denotes the depth of nesting of the treenode. /// [Browsable(false)] public int Level { get { if (this.Parent == null) { return 0; } else { return Parent.Level + 1; } } } ////// /// The next sibling node. /// [Browsable(false)] public TreeNode NextNode { get { if (index+1 < parent.Nodes.Count) { return parent.Nodes[index+1]; } else { return null; } } } ////// /// The next visible node. It may be a child, sibling, /// or a node from another branch. /// [Browsable(false)] public TreeNode NextVisibleNode { get { // TVGN_NEXTVISIBLE can only be sent if the specified node is visible. // So before sending, we check if this node is visible. If not, we find the first visible parent. // if (TreeView == null) { return null; } TreeNode node = FirstVisibleParent; if (node != null) { IntPtr next = UnsafeNativeMethods.SendMessage(new HandleRef(TreeView, TreeView.Handle), NativeMethods.TVM_GETNEXTITEM, NativeMethods.TVGN_NEXTVISIBLE, node.Handle); if (next != IntPtr.Zero) { return TreeView.NodeFromHandle(next); } } return null; } } ////// /// The font that will be used to draw this node /// If null, the font used will be the default font from the TreeView control that this /// node is attached to. /// NOTE: If the node font is larger than the default font from the TreeView control, then /// the node will be clipped. /// [ Localizable(true), SRCategory(SR.CatAppearance), SRDescription(SR.TreeNodeNodeFontDescr), DefaultValue(null) ] public Font NodeFont { get { if (propBag==null) return null; return propBag.Font; } set { Font oldfont = this.NodeFont; // If we're setting the font to the default again, delete the propBag if it doesn't contain // useful data. if (value==null) { if (propBag!=null) { propBag.Font = null; RemovePropBagIfEmpty(); } if (oldfont != null) InvalidateHostTree(); return; } // Not the default, so if necessary create a new propBag, and fill it with the font if (propBag==null) propBag = new OwnerDrawPropertyBag(); propBag.Font = value; if (!value.Equals(oldfont)) InvalidateHostTree(); } } ////// /// [ ListBindable(false), Browsable(false) ] public TreeNodeCollection Nodes { get { if (nodes == null) { nodes = new TreeNodeCollection(this); } return nodes; } } ///[To be supplied.] ////// /// Retrieves parent node. /// [Browsable(false)] public TreeNode Parent { get { TreeView tv = TreeView; // Don't expose the virtual root publicly if (tv != null && parent == tv.root) { return null; } return parent; } } ////// /// The previous sibling node. /// [Browsable(false)] public TreeNode PrevNode { get { //fixedIndex is used for perf. optimization in case of adding big ranges of nodes int currentInd = index; int fixedInd = parent.Nodes.FixedIndex; if (fixedInd > 0) { currentInd = fixedInd; } if (currentInd > 0 && currentInd <= parent.Nodes.Count) { return parent.Nodes[currentInd-1]; } else { return null; } } } ////// /// The next visible node. It may be a parent, sibling, /// or a node from another branch. /// [Browsable(false)] public TreeNode PrevVisibleNode { get { // TVGN_PREVIOUSVISIBLE can only be sent if the specified node is visible. // So before sending, we check if this node is visible. If not, we find the first visible parent. // TreeNode node = FirstVisibleParent; if (node != null) { if (TreeView == null) { return null; } IntPtr prev = UnsafeNativeMethods.SendMessage(new HandleRef(TreeView, TreeView.Handle), NativeMethods.TVM_GETNEXTITEM, NativeMethods.TVGN_PREVIOUSVISIBLE, node.Handle); if (prev != IntPtr.Zero) { return TreeView.NodeFromHandle(prev); } } return null; } } ////// /// The index of the image displayed when the node is in the selected state. /// The image is contained in the ImageList referenced by the imageList property. /// [ Localizable(true), SRCategory(SR.CatBehavior), SRDescription(SR.TreeNodeSelectedImageIndexDescr), TypeConverterAttribute(typeof(TreeViewImageIndexConverter)), DefaultValue(-1), RefreshProperties(RefreshProperties.Repaint), Editor("System.Windows.Forms.Design.ImageIndexEditor, " + AssemblyRef.SystemDesign, typeof(UITypeEditor)), RelatedImageList("TreeView.ImageList") ] public int SelectedImageIndex { get { return SelectedImageIndexer.Index; } set { SelectedImageIndexer.Index = value; UpdateNode(NativeMethods.TVIF_SELECTEDIMAGE); } } ////// /// The index of the image displayed when the node is in the selected state. /// The image is contained in the ImageList referenced by the imageList property. /// [ Localizable(true), SRCategory(SR.CatBehavior), SRDescription(SR.TreeNodeSelectedImageKeyDescr), TypeConverterAttribute(typeof(TreeViewImageKeyConverter)), DefaultValue(""), RefreshProperties(RefreshProperties.Repaint), Editor("System.Windows.Forms.Design.ImageIndexEditor, " + AssemblyRef.SystemDesign, typeof(UITypeEditor)), RelatedImageList("TreeView.ImageList") ] public string SelectedImageKey { get { return SelectedImageIndexer.Key; } set { SelectedImageIndexer.Key = value; UpdateNode(NativeMethods.TVIF_SELECTEDIMAGE); } } ////// /// Retrieve state bits for this node /// ///internal int State { get { if (handle == IntPtr.Zero) return 0; if (TreeView == null) { return 0; } NativeMethods.TV_ITEM item = new NativeMethods.TV_ITEM(); item.hItem = Handle; item.mask = NativeMethods.TVIF_HANDLE | NativeMethods.TVIF_STATE; item.stateMask = NativeMethods.TVIS_SELECTED | NativeMethods.TVIS_EXPANDED; UnsafeNativeMethods.SendMessage(new HandleRef(TreeView, TreeView.Handle), NativeMethods.TVM_GETITEM, 0, ref item); return item.state; } } /// /// /// The key of the StateImage that the user want to display. /// [ Localizable(true), SRCategory(SR.CatBehavior), SRDescription(SR.TreeNodeStateImageKeyDescr), TypeConverterAttribute(typeof(ImageKeyConverter)), DefaultValue(""), Editor("System.Windows.Forms.Design.ImageIndexEditor, " + AssemblyRef.SystemDesign, typeof(UITypeEditor)), RefreshProperties(RefreshProperties.Repaint), RelatedImageList("TreeView.StateImageList") ] public string StateImageKey { get { return StateImageIndexer.Key; } set { if (StateImageIndexer.Key != value) { StateImageIndexer.Key = value; if (treeView != null && !treeView.CheckBoxes) { UpdateNode(NativeMethods.TVIF_STATE); } } } } ////// /// [ Localizable(true), TypeConverterAttribute(typeof(NoneExcludedImageIndexConverter)), DefaultValue(-1), SRCategory(SR.CatBehavior), SRDescription(SR.TreeNodeStateImageIndexDescr), Editor("System.Windows.Forms.Design.ImageIndexEditor, " + AssemblyRef.SystemDesign, typeof(UITypeEditor)), RefreshProperties(RefreshProperties.Repaint), RelatedImageList("TreeView.StateImageList") ] public int StateImageIndex { get { return (treeView == null || treeView.StateImageList == null) ? -1:StateImageIndexer.Index; } set { if (value < -1 || value > ALLOWEDIMAGES) { throw new ArgumentOutOfRangeException("StateImageIndex", SR.GetString(SR.InvalidArgument, "StateImageIndex", (value).ToString(CultureInfo.CurrentCulture))); } StateImageIndexer.Index = value; if (treeView != null && !treeView.CheckBoxes) { UpdateNode(NativeMethods.TVIF_STATE); } } } //[To be supplied.] ////// [ SRCategory(SR.CatData), Localizable(false), Bindable(true), SRDescription(SR.ControlTagDescr), DefaultValue(null), TypeConverter(typeof(StringConverter)), ] public object Tag { get { return userData; } set { userData = value; } } /// /// /// The label text for the tree node /// [ Localizable(true), SRCategory(SR.CatAppearance), SRDescription(SR.TreeNodeTextDescr) ] public string Text { get { return text == null ? "" : text; } set { this.text = value; UpdateNode(NativeMethods.TVIF_TEXT); } } ////// /// The ToolTip text that will be displayed when the mouse hovers over the node. /// [ Localizable(false), SRCategory(SR.CatAppearance), SRDescription(SR.TreeNodeToolTipTextDescr), DefaultValue("") ] public string ToolTipText { get { return toolTipText; } set { toolTipText = value; } } ////// /// The name for the tree node - useful for indexing. /// [ SRCategory(SR.CatAppearance), SRDescription(SR.TreeNodeNodeNameDescr) ] public string Name { get { return name == null ? "" : name; } set { this.name = value; } } ////// /// Return the TreeView control this node belongs to. /// [Browsable(false)] public TreeView TreeView { get { if (treeView == null) treeView = FindTreeView(); return treeView; } } ////// /// Adds a new child node at the appropriate sorted position /// ///internal int AddSorted(TreeNode node) { int index = 0; int iMin, iLim, iT; string nodeText = node.Text; TreeView parentTreeView = TreeView; if (childCount > 0) { if (parentTreeView.TreeViewNodeSorter == null) { CompareInfo compare = Application.CurrentCulture.CompareInfo; // Optimize for the case where they're already sorted if (compare.Compare(children[childCount-1].Text, nodeText) <= 0) index = childCount; else { // Insert at appropriate sorted spot for (iMin = 0, iLim = childCount; iMin < iLim;) { iT = (iMin + iLim) / 2; if (compare.Compare(children[iT].Text, nodeText) <= 0) iMin = iT + 1; else iLim = iT; } index = iMin; } } else { IComparer sorter = parentTreeView.TreeViewNodeSorter; // Insert at appropriate sorted spot for (iMin = 0, iLim = childCount; iMin < iLim;) { iT = (iMin + iLim) / 2; if (sorter.Compare(children[iT] /*previous*/, node/*current*/) <= 0) iMin = iT + 1; else iLim = iT; } index = iMin; } } node.SortChildren(parentTreeView); InsertNodeAt(index, node); return index; } /// /// /// Returns a TreeNode object for the given HTREEITEM handle /// public static TreeNode FromHandle(TreeView tree, IntPtr handle) { // SECREVIEW: // Demand before we pass the TreeNode form handle. IntSecurity.ControlFromHandleOrLocation.Demand(); return tree.NodeFromHandle(handle); } private void SortChildren(TreeView parentTreeView) { // if (childCount > 0) { TreeNode[] newOrder = new TreeNode[childCount]; if (parentTreeView == null || parentTreeView.TreeViewNodeSorter == null) { CompareInfo compare = Application.CurrentCulture.CompareInfo; for (int i = 0; i < childCount; i++) { int min = -1; for (int j = 0; j < childCount; j++) { if (children[j] == null) continue; if (min == -1) { min = j; continue; } if (compare.Compare(children[j].Text, children[min].Text) <= 0) min = j; } Debug.Assert(min != -1, "Bad sorting"); newOrder[i] = children[min]; children[min] = null; newOrder[i].index = i; newOrder[i].SortChildren(parentTreeView); } children = newOrder; } else { IComparer sorter = parentTreeView.TreeViewNodeSorter; for (int i = 0; i < childCount; i++) { int min = -1; for (int j = 0; j < childCount; j++) { if (children[j] == null) continue; if (min == -1) { min = j; continue; } if (sorter.Compare(children[j] /*previous*/, children[min] /*current*/) <= 0) min = j; } Debug.Assert(min != -1, "Bad sorting"); newOrder[i] = children[min]; children[min] = null; newOrder[i].index = i; newOrder[i].SortChildren(parentTreeView); } children = newOrder; } } } ////// /// Initiate editing of the node's label. /// Only effective if LabelEdit property is true. /// public void BeginEdit() { if (handle != IntPtr.Zero) { TreeView tv = TreeView; if (tv.LabelEdit == false) throw new InvalidOperationException(SR.GetString(SR.TreeNodeBeginEditFailed)); if (!tv.Focused) tv.FocusInternal(); UnsafeNativeMethods.SendMessage(new HandleRef(tv, tv.Handle), NativeMethods.TVM_EDITLABEL, 0, handle); } } ////// Called by the tree node collection to clear all nodes. We optimize here if /// this is the root node. /// internal void Clear() { // This is a node that is a child of some other node. We have // to selectively remove children here. // bool isBulkOperation = false; TreeView tv = TreeView; try { if (tv != null) { tv.nodesCollectionClear = true; if (tv != null && childCount > MAX_TREENODES_OPS) { isBulkOperation = true; tv.BeginUpdate(); } } while(childCount > 0) { children[childCount - 1].Remove(true); } children = null; if (tv != null && isBulkOperation) { tv.EndUpdate(); } } finally { if (tv != null) { tv.nodesCollectionClear = false; } nodesCleared = true; } } ////// /// Clone the entire subtree rooted at this node. /// public virtual object Clone() { Type clonedType = this.GetType(); TreeNode node = null; if (clonedType == typeof(TreeNode)){ node = new TreeNode(text, ImageIndexer.Index, SelectedImageIndexer.Index); } else { // SECREVIEW : Late-binding does not represent a security thread, see bug#411899 for more info.. // node = (TreeNode)Activator.CreateInstance(clonedType); } node.Text = text; node.Name = name; node.ImageIndexer.Index = ImageIndexer.Index; node.SelectedImageIndexer.Index = SelectedImageIndexer.Index; node.StateImageIndexer.Index = StateImageIndexer.Index; node.ToolTipText = toolTipText; node.ContextMenu = contextMenu; node.ContextMenuStrip = contextMenuStrip; // only set the key if it's set to something useful if ( ! (string.IsNullOrEmpty(ImageIndexer.Key))) { node.ImageIndexer.Key = ImageIndexer.Key; } // only set the key if it's set to something useful if (!(string.IsNullOrEmpty(SelectedImageIndexer.Key))) { node.SelectedImageIndexer.Key = SelectedImageIndexer.Key; } // only set the key if it's set to something useful if (!(string.IsNullOrEmpty(StateImageIndexer.Key))) { node.StateImageIndexer.Key = StateImageIndexer.Key; } if (childCount > 0) { node.children = new TreeNode[childCount]; for (int i = 0; i < childCount; i++) node.Nodes.Add((TreeNode)children[i].Clone()); } // Clone properties // if (propBag != null) { node.propBag = OwnerDrawPropertyBag.Copy(propBag); } node.Checked = this.Checked; node.Tag = this.Tag; return node; } private void CollapseInternal(bool ignoreChildren) { TreeView tv = TreeView; bool setSelection = false; collapseOnRealization = false; expandOnRealization = false; if (tv == null || !tv.IsHandleCreated) { collapseOnRealization = true; return; } //terminating condition for recursion... // if (ignoreChildren) { DoCollapse(tv); } else { if (!ignoreChildren && childCount > 0) { // Virtual root should collapse all its children for (int i = 0; i < childCount; i++) { if (tv.SelectedNode == children[i]) { setSelection = true; } children[i].DoCollapse(tv); children[i].Collapse(); } } DoCollapse(tv); } if (setSelection) tv.SelectedNode = this; tv.Invalidate(); collapseOnRealization = false; } ////// /// Collapse the node ignoring its children while collapsing the parent /// public void Collapse(bool ignoreChildren) { CollapseInternal(ignoreChildren); } ////// /// Collapse the node. /// public void Collapse() { CollapseInternal(false); } ////// /// Windows TreeView doesn't send the proper notifications on collapse, so we do it manually. /// private void DoCollapse(TreeView tv) { if ((State & NativeMethods.TVIS_EXPANDED) != 0) { TreeViewCancelEventArgs e = new TreeViewCancelEventArgs(this, false, TreeViewAction.Collapse); tv.OnBeforeCollapse(e); if (!e.Cancel) { UnsafeNativeMethods.SendMessage(new HandleRef(tv, tv.Handle), NativeMethods.TVM_EXPAND, NativeMethods.TVE_COLLAPSE, Handle); tv.OnAfterCollapse(new TreeViewEventArgs(this)); } } } ////// /// protected virtual void Deserialize(SerializationInfo serializationInfo, StreamingContext context) { int childCount = 0; int imageIndex = -1; string imageKey = null; int selectedImageIndex = -1; string selectedImageKey = null; int stateImageIndex = -1; string stateImageKey = null; foreach (SerializationEntry entry in serializationInfo) { switch (entry.Name) { case "PropBag": // SEC propBag = (OwnerDrawPropertyBag)serializationInfo.GetValue(entry.Name, typeof(OwnerDrawPropertyBag)); break; case "Text": Text = serializationInfo.GetString(entry.Name); break; case "Name": Name = serializationInfo.GetString(entry.Name); break; case "IsChecked": CheckedStateInternal = serializationInfo.GetBoolean(entry.Name); break; case "ImageIndex": imageIndex = serializationInfo.GetInt32(entry.Name); break; case "SelectedImageIndex": selectedImageIndex = serializationInfo.GetInt32(entry.Name); break; case "ImageKey": imageKey = serializationInfo.GetString(entry.Name); break; case "SelectedImageKey": selectedImageKey= serializationInfo.GetString(entry.Name); break; case "StateImageKey": stateImageKey = serializationInfo.GetString(entry.Name); break; case "StateImageIndex": stateImageIndex = serializationInfo.GetInt32(entry.Name); break; case "ChildCount": childCount = serializationInfo.GetInt32(entry.Name); break; case "UserData": userData = entry.Value; break; } } // let imagekey take precidence if (imageKey != null) { ImageKey = imageKey; } else if (imageIndex != -1) { ImageIndex = imageIndex; } // let selectedimagekey take precidence if (selectedImageKey != null) { SelectedImageKey = selectedImageKey; } else if (selectedImageIndex != -1) { SelectedImageIndex = selectedImageIndex; } // let stateimagekey take precidence if (stateImageKey != null) { StateImageKey = stateImageKey; } else if (stateImageIndex != -1) { StateImageIndex = stateImageIndex; } if (childCount > 0) { TreeNode[] childNodes = new TreeNode[childCount]; for (int i = 0; i < childCount; i++) { // SEC childNodes[i] = (TreeNode)serializationInfo.GetValue("children" + i, typeof(TreeNode)); } Nodes.AddRange(childNodes); } } ///[To be supplied.] ////// /// Terminate the editing of any tree view item's label. /// public void EndEdit(bool cancel) { if (TreeView == null) { return; } UnsafeNativeMethods.SendMessage(new HandleRef(TreeView, TreeView.Handle), NativeMethods.TVM_ENDEDITLABELNOW, cancel?1:0, 0); } ////// /// Makes sure there is enough room to add n children /// ///internal void EnsureCapacity(int num) { Debug.Assert(num > 0,"required capacity can not be less than 1"); int size = num; if (size < 4) { size = 4; } if (children == null) { children = new TreeNode[size]; } else if (childCount + num > children.Length) { int newSize = childCount + num; if (num == 1) { newSize = childCount * 2; } TreeNode[] bigger = new TreeNode[newSize]; System.Array.Copy(children, 0, bigger, 0, childCount); children = bigger; } } /// /// /// Ensures the the node's StateImageIndex value is properly set. /// ///private void EnsureStateImageValue() { if (treeView == null) { return; } if (treeView.CheckBoxes && treeView.StateImageList != null) { if (!String.IsNullOrEmpty(this.StateImageKey)) { this.StateImageIndex = (this.Checked) ? 1 : 0; this.StateImageKey = treeView.StateImageList.Images.Keys[this.StateImageIndex]; } else { this.StateImageIndex = (this.Checked) ? 1 : 0; } } } /// /// /// Ensure that the node is visible, expanding nodes and scrolling the /// TreeView control as necessary. /// public void EnsureVisible() { if (TreeView == null) { return; } UnsafeNativeMethods.SendMessage(new HandleRef(TreeView, TreeView.Handle), NativeMethods.TVM_ENSUREVISIBLE, 0, Handle); } ////// /// Expand the node. /// public void Expand() { TreeView tv = TreeView; if (tv == null || !tv.IsHandleCreated) { expandOnRealization = true; return; } ResetExpandedState(tv); if (!IsExpanded) { UnsafeNativeMethods.SendMessage(new HandleRef(tv, tv.Handle), NativeMethods.TVM_EXPAND, NativeMethods.TVE_EXPAND, Handle); } expandOnRealization = false; } ////// /// Expand the node. /// public void ExpandAll() { Expand(); for (int i = 0; i < childCount; i++) { children[i].ExpandAll(); } } ////// /// Locate this tree node's containing tree view control by scanning /// up to the virtual root, whose treeView pointer we know to be /// correct /// internal TreeView FindTreeView() { TreeNode node = this; while (node.parent != null) node = node.parent; return node.treeView; } ////// /// Helper function for getFullPath(). /// private void GetFullPath(StringBuilder path, string pathSeparator) { if (parent != null) { parent.GetFullPath(path, pathSeparator); if (parent.parent != null) path.Append(pathSeparator); path.Append(this.text); } } ////// /// Returns number of child nodes. /// public int GetNodeCount(bool includeSubTrees) { int total = childCount; if (includeSubTrees) { for (int i = 0; i < childCount; i++) total += children[i].GetNodeCount(true); } return total; } ////// /// Helper function to add node at a given index after all validation has been done /// ///internal void InsertNodeAt(int index, TreeNode node) { EnsureCapacity(1); node.parent = this; node.index = index; for (int i = childCount; i > index; --i) { (children[i] = children[i-1]).index = i; } children[index] = node; childCount++; node.Realize(false); if (TreeView != null && node == TreeView.selectedNode) TreeView.SelectedNode = node; // communicate this to the handle } /// /// /// Invalidates the treeview control that is hosting this node /// private void InvalidateHostTree() { if (treeView != null && treeView.IsHandleCreated) treeView.Invalidate(); } ////// /// ///internal void Realize(bool insertFirst) { // Debug.assert(handle == 0, "Node already realized"); TreeView tv = TreeView; if (tv == null || !tv.IsHandleCreated) return; if (parent == null && !tv.IsUpdating() && Application.RenderWithVisualStyles) { tv.SendMessage(NativeMethods.WM_SETREDRAW, 0, 0); } try { if (parent != null) { // Never realize the virtual root if (tv.InvokeRequired) { throw new InvalidOperationException(SR.GetString(SR.InvalidCrossThreadControlCall)); } NativeMethods.TV_INSERTSTRUCT tvis = new NativeMethods.TV_INSERTSTRUCT(); tvis.item_mask = insertMask; tvis.hParent = parent.handle; TreeNode prev = PrevNode; if (insertFirst || prev == null) { tvis.hInsertAfter = (IntPtr)NativeMethods.TVI_FIRST; } else { tvis.hInsertAfter = prev.handle; // Debug.assert(tvis.hInsertAfter != 0); } tvis.item_pszText = Marshal.StringToHGlobalAuto(text); tvis.item_iImage = (ImageIndexer.ActualIndex == -1) ? tv.ImageIndexer.ActualIndex : ImageIndexer.ActualIndex; tvis.item_iSelectedImage = (SelectedImageIndexer.ActualIndex == -1) ? tv.SelectedImageIndexer.ActualIndex : SelectedImageIndexer.ActualIndex; tvis.item_mask = NativeMethods.TVIF_TEXT; tvis.item_stateMask = 0; tvis.item_state = 0; if (tv.CheckBoxes) { tvis.item_mask |= NativeMethods.TVIF_STATE; tvis.item_stateMask |= NativeMethods.TVIS_STATEIMAGEMASK; tvis.item_state |= CheckedInternal ? CHECKED : UNCHECKED; } else if (tv.StateImageList != null && StateImageIndexer.ActualIndex >= 0) { tvis.item_mask |= NativeMethods.TVIF_STATE; tvis.item_stateMask = NativeMethods.TVIS_STATEIMAGEMASK; tvis.item_state = ((StateImageIndexer.ActualIndex + 1) << SHIFTVAL); } if (tvis.item_iImage >= 0) tvis.item_mask |= NativeMethods.TVIF_IMAGE; if (tvis.item_iSelectedImage >= 0) tvis.item_mask |= NativeMethods.TVIF_SELECTEDIMAGE; // If you are editing when you add a new node, then the edit control // gets placed in the wrong place. You must restore the edit mode // asynchronously (PostMessage) after the add is complete // to get the expected behavior. // bool editing = false; IntPtr editHandle = UnsafeNativeMethods.SendMessage(new HandleRef(TreeView, TreeView.Handle), NativeMethods.TVM_GETEDITCONTROL, 0, 0); if (editHandle != IntPtr.Zero) { // currently editing... // editing = true; UnsafeNativeMethods.SendMessage(new HandleRef(TreeView, TreeView.Handle), NativeMethods.TVM_ENDEDITLABELNOW, 0 /* fCancel==FALSE */, 0); } handle = UnsafeNativeMethods.SendMessage(new HandleRef(TreeView, TreeView.Handle), NativeMethods.TVM_INSERTITEM, 0, ref tvis); tv.nodeTable[handle] = this; // Lets update the Lparam to the Handle .... UpdateNode(NativeMethods.TVIF_PARAM); Marshal.FreeHGlobal(tvis.item_pszText); if (editing) { UnsafeNativeMethods.PostMessage(new HandleRef(TreeView, TreeView.Handle), NativeMethods.TVM_EDITLABEL, IntPtr.Zero, handle); } SafeNativeMethods.InvalidateRect(new HandleRef(tv, tv.Handle), null, false); if (parent.nodesCleared && (insertFirst || prev == null) && !tv.Scrollable) { // We need to Redraw the TreeView ... // If and only If we are not scrollable ... // and this is the FIRST NODE to get added.. // This is Comctl quirk where it just doesn't draw // the first node after a Clear( ) if Scrollable == false. UnsafeNativeMethods.SendMessage(new HandleRef(TreeView, TreeView.Handle), NativeMethods.WM_SETREDRAW, 1, 0); nodesCleared = false; } } for (int i = childCount - 1; i >= 0; i--) children[i].Realize(true); // If node expansion was requested before the handle was created, // we can expand it now. if (expandOnRealization) { Expand(); } // If node collapse was requested before the handle was created, // we can expand it now. if (collapseOnRealization) { Collapse(); } } finally { if (!tv.IsUpdating() && parent == null && Application.RenderWithVisualStyles) { tv.SendMessage(NativeMethods.WM_SETREDRAW, -1, 0); } } } /// /// /// Remove this node from the TreeView control. Child nodes are also removed from the /// TreeView, but are still attached to this node. /// public void Remove() { Remove(true); } ////// /// ///internal void Remove(bool notify) { bool expanded = IsExpanded; // unlink our children // for (int i = 0; i < childCount; i++) children[i].Remove(false); // children = null; // unlink ourself if (notify && parent != null) { // the for loop below will always skip the indexed node if index == parent.ChildCount -1 // this will cause the Treeview to leak this Node. // so check that if (index == parent.childCount -1) { parent.children[index] = null; } for (int i = index; i < parent.childCount-1; ++i) { (parent.children[i] = parent.children[i+1]).index = i; } parent.childCount--; parent = null; } // Expand when we are realized the next time. expandOnRealization = expanded; // unrealize ourself if (TreeView == null) { return; } if (handle != IntPtr.Zero) { if (notify && TreeView.IsHandleCreated) UnsafeNativeMethods.SendMessage(new HandleRef(TreeView, TreeView.Handle), NativeMethods.TVM_DELETEITEM, 0, handle); treeView.nodeTable.Remove(handle); handle = IntPtr.Zero; } treeView = null; } /// /// /// Removes the propBag object if it's now devoid of useful data /// ///private void RemovePropBagIfEmpty() { if (propBag==null) return; if (propBag.IsEmpty()) propBag = null; return; } private void ResetExpandedState(TreeView tv) { Debug.Assert(tv.IsHandleCreated, "nonexistent handle"); NativeMethods.TV_ITEM item = new NativeMethods.TV_ITEM(); item.mask = NativeMethods.TVIF_HANDLE | NativeMethods.TVIF_STATE; item.hItem = handle; item.stateMask = NativeMethods.TVIS_EXPANDEDONCE; item.state = 0; UnsafeNativeMethods.SendMessage(new HandleRef(tv, tv.Handle), NativeMethods.TVM_SETITEM, 0, ref item); } private bool ShouldSerializeBackColor() { return BackColor != Color.Empty; } private bool ShouldSerializeForeColor() { return ForeColor != Color.Empty; } /// /// /// Saves this TreeNode object to the given data stream. /// /// Review: Changing this would break VB users. so suppresing this message. /// SECREVIEW: Since ISerializable.GetObjectData and Deserialize require SerializationFormatter - locking down. [SecurityPermissionAttribute(SecurityAction.Demand, Flags=SecurityPermissionFlag.SerializationFormatter), SecurityPermission(SecurityAction.InheritanceDemand, Flags=SecurityPermissionFlag.SerializationFormatter)] [SuppressMessage("Microsoft.Naming", "CA1704:IdentifiersShouldBeSpelledCorrectly")] protected virtual void Serialize(SerializationInfo si, StreamingContext context) { if (propBag != null) { si.AddValue("PropBag", propBag, typeof(OwnerDrawPropertyBag)); } si.AddValue("Text", text); si.AddValue("Name", Name); si.AddValue("IsChecked", treeNodeState[TREENODESTATE_isChecked]); si.AddValue("ImageIndex", ImageIndexer.Index); si.AddValue("ImageKey", ImageIndexer.Key); si.AddValue("SelectedImageIndex", SelectedImageIndexer.Index); si.AddValue("SelectedImageKey", SelectedImageIndexer.Key); if (this.treeView != null && this.treeView.StateImageList != null) { si.AddValue("StateImageIndex", StateImageIndexer.Index); } if (this.treeView != null && this.treeView.StateImageList != null) { si.AddValue("StateImageKey", StateImageIndexer.Key); } si.AddValue("ChildCount", childCount); if (childCount > 0) { for (int i = 0; i < childCount; i++) { si.AddValue("children" + i, children[i], typeof(TreeNode)); } } if (userData != null && userData.GetType().IsSerializable) { si.AddValue("UserData", userData, userData.GetType()); } } ////// /// Toggle the state of the node. Expand if collapsed or collapse if /// expanded. /// public void Toggle() { Debug.Assert(parent != null, "toggle on virtual root"); // I don't use the TVE_TOGGLE message 'cuz Windows TreeView doesn't send the appropriate // notifications when collapsing. if (IsExpanded) { Collapse(); } else { Expand(); } } ////// /// Returns the label text for the tree node /// public override string ToString() { return "TreeNode: " + (text == null ? "" : text); } ////// /// Tell the TreeView to refresh this node /// private void UpdateNode(int mask) { if (handle == IntPtr.Zero) return; TreeView tv = TreeView; Debug.Assert(tv != null, "TreeNode has handle but no TreeView"); NativeMethods.TV_ITEM item = new NativeMethods.TV_ITEM(); item.mask = NativeMethods.TVIF_HANDLE | mask; item.hItem = handle; if ((mask & NativeMethods.TVIF_TEXT) != 0) item.pszText = Marshal.StringToHGlobalAuto(text); if ((mask & NativeMethods.TVIF_IMAGE) != 0) item.iImage = (ImageIndexer.ActualIndex == -1) ? tv.ImageIndexer.ActualIndex : ImageIndexer.ActualIndex; if ((mask & NativeMethods.TVIF_SELECTEDIMAGE) != 0) item.iSelectedImage = (SelectedImageIndexer.ActualIndex == -1) ? tv.SelectedImageIndexer.ActualIndex : SelectedImageIndexer.ActualIndex; if ((mask & NativeMethods.TVIF_STATE) != 0) { item.stateMask = NativeMethods.TVIS_STATEIMAGEMASK; if (StateImageIndexer.ActualIndex != -1) { item.state = ((StateImageIndexer.ActualIndex + 1) << SHIFTVAL); } // VSWhidbey 143401: ActualIndex == -1 means "don't use custom image list" // so just leave item.state set to zero, that tells the unmanaged control // to use no state image for this node. } if ((mask & NativeMethods.TVIF_PARAM) != 0) { item.lParam = handle; } UnsafeNativeMethods.SendMessage(new HandleRef(tv, tv.Handle), NativeMethods.TVM_SETITEM, 0, ref item); if ((mask & NativeMethods.TVIF_TEXT) != 0) { Marshal.FreeHGlobal(item.pszText); if (tv.Scrollable) tv.ForceScrollbarUpdate(false); } } internal void UpdateImage () { NativeMethods.TV_ITEM item = new NativeMethods.TV_ITEM(); item.mask = NativeMethods.TVIF_HANDLE | NativeMethods.TVIF_IMAGE; item.hItem = Handle; item.iImage = Math.Max(0, ((ImageIndexer.ActualIndex >= TreeView.ImageList.Images.Count) ? TreeView.ImageList.Images.Count - 1 : ImageIndexer.ActualIndex)); UnsafeNativeMethods.SendMessage(new HandleRef(TreeView, TreeView.Handle), NativeMethods.TVM_SETITEM, 0, ref item); } ////// /// ISerializable private implementation /// ///[SecurityPermissionAttribute(SecurityAction.LinkDemand, Flags=SecurityPermissionFlag.SerializationFormatter)] void ISerializable.GetObjectData(SerializationInfo si, StreamingContext context) { Serialize(si, context); } } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007.
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