2 // System.Web.UI.WebControls.TreeView.cs
5 // Lluis Sanchez Gual (lluis@novell.com)
7 // (C) 2004 Novell, Inc (http://www.novell.com)
9 // Permission is hereby granted, free of charge, to any person obtaining
10 // a copy of this software and associated documentation files (the
11 // "Software"), to deal in the Software without restriction, including
12 // without limitation the rights to use, copy, modify, merge, publish,
13 // distribute, sublicense, and/or sell copies of the Software, and to
14 // permit persons to whom the Software is furnished to do so, subject to
15 // the following conditions:
17 // The above copyright notice and this permission notice shall be
18 // included in all copies or substantial portions of the Software.
20 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
21 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
22 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
23 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
24 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
25 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
26 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
28 // Copyright (C) 2004 Novell, Inc (http://www.novell.com)
33 using System.Collections;
35 using System.ComponentModel;
36 using System.Web.Handlers;
37 using System.Collections.Specialized;
39 using System.Security.Permissions;
40 using System.Collections.Generic;
42 namespace System.Web.UI.WebControls
45 [AspNetHostingPermission (SecurityAction.LinkDemand, Level = AspNetHostingPermissionLevel.Minimal)]
46 [AspNetHostingPermission (SecurityAction.InheritanceDemand, Level = AspNetHostingPermissionLevel.Minimal)]
48 [SupportsEventValidation]
49 [ControlValueProperty ("SelectedValue")]
50 [DefaultEvent ("SelectedNodeChanged")]
51 [Designer ("System.Web.UI.Design.WebControls.TreeViewDesigner, " + Consts.AssemblySystem_Design, "System.ComponentModel.Design.IDesigner")]
52 public class TreeView: HierarchicalDataBoundControl, IPostBackEventHandler, IPostBackDataHandler, ICallbackEventHandler
56 TreeNodeStyle leafNodeStyle;
57 TreeNodeStyle nodeStyle;
58 TreeNodeStyle parentNodeStyle;
59 TreeNodeStyle rootNodeStyle;
60 TreeNodeStyle selectedNodeStyle;
62 TreeNodeStyleCollection levelStyles;
63 TreeNodeCollection nodes;
64 TreeNodeBindingCollection dataBindings;
66 TreeNode selectedNode;
69 int registeredStylesCounter = -1;
70 List<Style> levelLinkStyles;
71 Style controlLinkStyle;
73 Style rootNodeLinkStyle;
74 Style parentNodeLinkStyle;
75 Style leafNodeLinkStyle;
76 Style selectedNodeLinkStyle;
77 Style hoverNodeLinkStyle;
79 private static readonly object TreeNodeCheckChangedEvent = new object();
80 private static readonly object SelectedNodeChangedEvent = new object();
81 private static readonly object TreeNodeCollapsedEvent = new object();
82 private static readonly object TreeNodeDataBoundEvent = new object();
83 private static readonly object TreeNodeExpandedEvent = new object();
84 private static readonly object TreeNodePopulateEvent = new object();
86 static Hashtable imageStyles = new Hashtable ();
90 public ImageStyle (string expand, string collapse, string noExpand, string icon, string iconLeaf, string iconRoot) {
100 public string Collapse;
101 public string NoExpand;
102 public string RootIcon;
103 public string ParentIcon;
104 public string LeafIcon;
109 imageStyles [TreeViewImageSet.Arrows] = new ImageStyle ("arrow_plus", "arrow_minus", "arrow_noexpand", null, null, null);
110 imageStyles [TreeViewImageSet.BulletedList] = new ImageStyle (null, null, null, "dot_full", "dot_empty", "dot_full");
111 imageStyles [TreeViewImageSet.BulletedList2] = new ImageStyle (null, null, null, "box_full", "box_empty", "box_full");
112 imageStyles [TreeViewImageSet.BulletedList3] = new ImageStyle (null, null, null, "star_full", "star_empty", "star_full");
113 imageStyles [TreeViewImageSet.BulletedList4] = new ImageStyle (null, null, null, "star_full", "star_empty", "dots");
114 imageStyles [TreeViewImageSet.Contacts] = new ImageStyle ("TreeView_plus", "TreeView_minus", "contact", null, null, null);
115 imageStyles [TreeViewImageSet.Events] = new ImageStyle (null, null, null, "warning", "warning", "warning");
116 imageStyles [TreeViewImageSet.Inbox] = new ImageStyle (null, null, null, "inbox", "inbox", "inbox");
117 imageStyles [TreeViewImageSet.Msdn] = new ImageStyle ("box_plus", "box_minus", "box_noexpand", null, null, null);
118 imageStyles [TreeViewImageSet.Simple] = new ImageStyle (null, null, "box_full", null, null, null);
119 imageStyles [TreeViewImageSet.Simple2] = new ImageStyle (null, null, "box_empty", null, null, null);
122 imageStyles [TreeViewImageSet.News] = new ImageStyle ("TreeView_plus", "TreeView_minus", "TreeView_noexpand", null, null, null);
123 imageStyles [TreeViewImageSet.Faq] = new ImageStyle ("TreeView_plus", "TreeView_minus", "TreeView_noexpand", null, null, null);
124 imageStyles [TreeViewImageSet.WindowsHelp] = new ImageStyle ("TreeView_plus", "TreeView_minus", "TreeView_noexpand", null, null, null);
125 imageStyles [TreeViewImageSet.XPFileExplorer] = new ImageStyle ("TreeView_plus", "TreeView_minus", "TreeView_noexpand", null, null, null);
128 public event TreeNodeEventHandler TreeNodeCheckChanged {
129 add { Events.AddHandler (TreeNodeCheckChangedEvent, value); }
130 remove { Events.RemoveHandler (TreeNodeCheckChangedEvent, value); }
133 public event EventHandler SelectedNodeChanged {
134 add { Events.AddHandler (SelectedNodeChangedEvent, value); }
135 remove { Events.RemoveHandler (SelectedNodeChangedEvent, value); }
138 public event TreeNodeEventHandler TreeNodeCollapsed {
139 add { Events.AddHandler (TreeNodeCollapsedEvent, value); }
140 remove { Events.RemoveHandler (TreeNodeCollapsedEvent, value); }
143 public event TreeNodeEventHandler TreeNodeDataBound {
144 add { Events.AddHandler (TreeNodeDataBoundEvent, value); }
145 remove { Events.RemoveHandler (TreeNodeDataBoundEvent, value); }
148 public event TreeNodeEventHandler TreeNodeExpanded {
149 add { Events.AddHandler (TreeNodeExpandedEvent, value); }
150 remove { Events.RemoveHandler (TreeNodeExpandedEvent, value); }
153 public event TreeNodeEventHandler TreeNodePopulate {
154 add { Events.AddHandler (TreeNodePopulateEvent, value); }
155 remove { Events.RemoveHandler (TreeNodePopulateEvent, value); }
158 protected virtual void OnTreeNodeCheckChanged (TreeNodeEventArgs e)
160 if (Events != null) {
161 TreeNodeEventHandler eh = (TreeNodeEventHandler) Events [TreeNodeCheckChangedEvent];
162 if (eh != null) eh (this, e);
166 protected virtual void OnSelectedNodeChanged (EventArgs e)
168 if (Events != null) {
169 EventHandler eh = (EventHandler) Events [SelectedNodeChangedEvent];
170 if (eh != null) eh (this, e);
174 protected virtual void OnTreeNodeCollapsed (TreeNodeEventArgs e)
176 if (Events != null) {
177 TreeNodeEventHandler eh = (TreeNodeEventHandler) Events [TreeNodeCollapsedEvent];
178 if (eh != null) eh (this, e);
182 protected virtual void OnTreeNodeDataBound (TreeNodeEventArgs e)
184 if (Events != null) {
185 TreeNodeEventHandler eh = (TreeNodeEventHandler) Events [TreeNodeDataBoundEvent];
186 if (eh != null) eh (this, e);
190 protected virtual void OnTreeNodeExpanded (TreeNodeEventArgs e)
192 if (Events != null) {
193 TreeNodeEventHandler eh = (TreeNodeEventHandler) Events [TreeNodeExpandedEvent];
194 if (eh != null) eh (this, e);
198 protected virtual void OnTreeNodePopulate (TreeNodeEventArgs e)
200 if (Events != null) {
201 TreeNodeEventHandler eh = (TreeNodeEventHandler) Events [TreeNodePopulateEvent];
202 if (eh != null) eh (this, e);
208 public string CollapseImageToolTip {
210 return ViewState.GetString ("CollapseImageToolTip", "Collapse {0}");
213 ViewState["CollapseImageToolTip"] = value;
217 [MonoTODO ("Implement support for this")]
218 [WebCategory ("Behavior")]
219 [WebSysDescription ("Whether the tree will automatically generate bindings.")]
220 [DefaultValue (true)]
221 public bool AutoGenerateDataBindings {
223 return ViewState.GetBool ("AutoGenerateDataBindings", true);
226 ViewState["AutoGenerateDataBindings"] = value;
231 [WebSysDescription ("The url of the image to show when a node can be collapsed.")]
233 [WebCategory ("Appearance")]
234 [Editor ("System.Web.UI.Design.ImageUrlEditor, " + Consts.AssemblySystem_Design, "System.Drawing.Design.UITypeEditor, " + Consts.AssemblySystem_Drawing)]
235 public string CollapseImageUrl {
237 return ViewState.GetString ("CollapseImageUrl", "");
240 ViewState["CollapseImageUrl"] = value;
244 [WebCategory ("Data")]
245 [PersistenceMode (PersistenceMode.InnerProperty)]
246 [WebSysDescription ("Bindings for tree nodes.")]
247 [Editor ("System.Web.UI.Design.WebControls.TreeViewBindingsEditor, " + Consts.AssemblySystem_Design, "System.Drawing.Design.UITypeEditor, " + Consts.AssemblySystem_Drawing)]
248 [DefaultValue (null)]
249 [MergablePropertyAttribute (false)]
250 public TreeNodeBindingCollection DataBindings {
252 if (dataBindings == null) {
253 dataBindings = new TreeNodeBindingCollection ();
254 if (IsTrackingViewState)
255 ((IStateManager)dataBindings).TrackViewState();
261 [WebCategory ("Behavior")]
262 [WebSysDescription ("Whether the tree view can use client-side script to expand and collapse nodes.")]
264 [DefaultValue (true)]
265 public bool EnableClientScript {
267 return ViewState.GetBool ("EnableClientScript", true);
270 ViewState["EnableClientScript"] = value;
275 [WebCategory ("Behavior")]
276 [WebSysDescription ("The initial expand depth.")]
277 [TypeConverter ("System.Web.UI.WebControls.TreeView+TreeViewExpandDepthConverter, " + Consts.AssemblySystem_Web)]
278 public int ExpandDepth {
280 return ViewState.GetInt ("ExpandDepth", -1);
283 ViewState["ExpandDepth"] = value;
288 public string ExpandImageToolTip {
290 return ViewState.GetString ("ExpandImageToolTip", "Expand {0}");
293 ViewState["ExpandImageToolTip"] = value;
299 [WebSysDescription ("The url of the image to show when a node can be expanded.")]
300 [WebCategory ("Appearance")]
301 [Editor ("System.Web.UI.Design.ImageUrlEditor, " + Consts.AssemblySystem_Design, "System.Drawing.Design.UITypeEditor, " + Consts.AssemblySystem_Drawing)]
302 public string ExpandImageUrl {
304 return ViewState.GetString ("ExpandImageUrl", "");
307 ViewState["ExpandImageUrl"] = value;
311 [PersistenceMode (PersistenceMode.InnerProperty)]
312 [NotifyParentProperty (true)]
313 [DefaultValue (null)]
314 [WebCategory ("Styles")]
315 [DesignerSerializationVisibility (DesignerSerializationVisibility.Content)]
316 public Style HoverNodeStyle {
318 if (hoverNodeStyle == null) {
319 hoverNodeStyle = new Style();
320 if (IsTrackingViewState)
321 hoverNodeStyle.TrackViewState();
323 return hoverNodeStyle;
327 [DefaultValue (TreeViewImageSet.Custom)]
328 public TreeViewImageSet ImageSet {
330 return (TreeViewImageSet)ViewState.GetInt ("ImageSet", (int)TreeViewImageSet.Custom);
333 if (!Enum.IsDefined (typeof (TreeViewImageSet), value))
334 throw new ArgumentOutOfRangeException ();
335 ViewState["ImageSet"] = value;
339 [PersistenceMode (PersistenceMode.InnerProperty)]
340 [NotifyParentProperty (true)]
341 [DefaultValue (null)]
342 [WebCategory ("Styles")]
343 [DesignerSerializationVisibility (DesignerSerializationVisibility.Content)]
344 public TreeNodeStyle LeafNodeStyle {
346 if (leafNodeStyle == null) {
347 leafNodeStyle = new TreeNodeStyle ();
348 if (IsTrackingViewState)
349 leafNodeStyle.TrackViewState();
351 return leafNodeStyle;
355 [DefaultValue (null)]
356 [WebCategory ("Styles")]
357 [PersistenceMode (PersistenceMode.InnerProperty)]
358 [Editor ("System.Web.UI.Design.WebControls.TreeNodeStyleCollectionEditor," + Consts.AssemblySystem_Design, "System.Drawing.Design.UITypeEditor, " + Consts.AssemblySystem_Drawing)]
359 public TreeNodeStyleCollection LevelStyles {
361 if (levelStyles == null) {
362 levelStyles = new TreeNodeStyleCollection ();
363 if (IsTrackingViewState)
364 ((IStateManager)levelStyles).TrackViewState();
371 public string LineImagesFolder {
373 return ViewState.GetString ("LineImagesFolder", "");
376 ViewState["LineImagesFolder"] = value;
381 public int MaxDataBindDepth {
383 return ViewState.GetInt ("MaxDataBindDepth", -1);
386 ViewState["MaxDataBindDepth"] = value;
391 public int NodeIndent {
393 return ViewState.GetInt ("NodeIndent", 20);
396 ViewState["NodeIndent"] = value;
400 [PersistenceMode (PersistenceMode.InnerProperty)]
401 [Editor ("System.Web.UI.Design.WebControls.TreeNodeCollectionEditor," + Consts.AssemblySystem_Design, "System.Drawing.Design.UITypeEditor, " + Consts.AssemblySystem_Drawing)]
402 [DefaultValueAttribute (null)]
403 [MergablePropertyAttribute (false)]
404 public TreeNodeCollection Nodes {
407 nodes = new TreeNodeCollection (this);
408 if (IsTrackingViewState)
409 ((IStateManager)nodes).TrackViewState();
415 [PersistenceMode (PersistenceMode.InnerProperty)]
416 [NotifyParentProperty (true)]
417 [DefaultValue (null)]
418 [WebCategory ("Styles")]
419 [DesignerSerializationVisibility (DesignerSerializationVisibility.Content)]
420 public TreeNodeStyle NodeStyle {
422 if (nodeStyle == null) {
423 nodeStyle = new TreeNodeStyle ();
424 if (IsTrackingViewState)
425 nodeStyle.TrackViewState();
431 [DefaultValue (false)]
432 public bool NodeWrap {
434 return ViewState.GetBool ("NodeWrap", false);
437 ViewState ["NodeWrap"] = value;
443 [WebSysDescription ("The url of the image to show for leaf nodes.")]
444 [WebCategory ("Appearance")]
445 [Editor ("System.Web.UI.Design.ImageUrlEditor, " + Consts.AssemblySystem_Design, "System.Drawing.Design.UITypeEditor, " + Consts.AssemblySystem_Drawing)]
446 public string NoExpandImageUrl {
448 return ViewState.GetString ("NoExpandImageUrl", "");
451 ViewState ["NoExpandImageUrl"] = value;
455 [PersistenceMode (PersistenceMode.InnerProperty)]
456 [NotifyParentProperty (true)]
457 [DefaultValue (null)]
458 [WebCategory ("Styles")]
459 [DesignerSerializationVisibility (DesignerSerializationVisibility.Content)]
460 public TreeNodeStyle ParentNodeStyle {
462 if (parentNodeStyle == null) {
463 parentNodeStyle = new TreeNodeStyle ();
464 if (IsTrackingViewState)
465 parentNodeStyle.TrackViewState();
467 return parentNodeStyle;
472 public char PathSeparator {
474 return ViewState.GetChar ("PathSeparator", '/');
477 ViewState ["PathSeparator"] = value;
481 [DefaultValue (true)]
482 public bool PopulateNodesFromClient {
484 return ViewState.GetBool ("PopulateNodesFromClient", true);
487 ViewState ["PopulateNodesFromClient"] = value;
491 [PersistenceMode (PersistenceMode.InnerProperty)]
492 [NotifyParentProperty (true)]
493 [DefaultValue (null)]
494 [WebCategory ("Styles")]
495 [DesignerSerializationVisibility (DesignerSerializationVisibility.Content)]
496 public TreeNodeStyle RootNodeStyle {
498 if (rootNodeStyle == null) {
499 rootNodeStyle = new TreeNodeStyle ();
500 if (IsTrackingViewState)
501 rootNodeStyle.TrackViewState();
503 return rootNodeStyle;
507 [PersistenceMode (PersistenceMode.InnerProperty)]
508 [NotifyParentProperty (true)]
509 [DefaultValue (null)]
510 [WebCategory ("Styles")]
511 [DesignerSerializationVisibility (DesignerSerializationVisibility.Content)]
512 public TreeNodeStyle SelectedNodeStyle {
514 if (selectedNodeStyle == null) {
515 selectedNodeStyle = new TreeNodeStyle ();
516 if (IsTrackingViewState)
517 selectedNodeStyle.TrackViewState();
519 return selectedNodeStyle;
523 private Style ControlLinkStyle {
525 if (controlLinkStyle == null) {
526 controlLinkStyle = new Style ();
527 controlLinkStyle.AlwaysRenderTextDecoration = true;
529 return controlLinkStyle;
533 private Style NodeLinkStyle {
535 if (nodeLinkStyle == null) {
536 nodeLinkStyle = new Style ();
538 return nodeLinkStyle;
542 private Style RootNodeLinkStyle {
544 if (rootNodeLinkStyle == null) {
545 rootNodeLinkStyle = new Style ();
547 return rootNodeLinkStyle;
551 private Style ParentNodeLinkStyle {
553 if (parentNodeLinkStyle == null) {
554 parentNodeLinkStyle = new Style ();
556 return parentNodeLinkStyle;
560 private Style SelectedNodeLinkStyle {
562 if (selectedNodeLinkStyle == null) {
563 selectedNodeLinkStyle = new Style ();
565 return selectedNodeLinkStyle;
569 private Style LeafNodeLinkStyle {
571 if (leafNodeLinkStyle == null) {
572 leafNodeLinkStyle = new Style ();
574 return leafNodeLinkStyle;
578 private Style HoverNodeLinkStyle {
580 if (hoverNodeLinkStyle == null) {
581 hoverNodeLinkStyle = new Style ();
583 return hoverNodeLinkStyle;
587 [DefaultValue (TreeNodeTypes.None)]
588 public TreeNodeTypes ShowCheckBoxes {
590 return (TreeNodeTypes)ViewState.GetInt ("ShowCheckBoxes", (int)TreeNodeTypes.None);
594 throw new ArgumentOutOfRangeException ();
595 ViewState ["ShowCheckBoxes"] = value;
599 [DefaultValue (true)]
600 public bool ShowExpandCollapse {
602 return ViewState.GetBool ("ShowExpandCollapse", true);
605 ViewState ["ShowExpandCollapse"] = value;
609 [DefaultValue (false)]
610 public bool ShowLines {
612 return ViewState.GetBool ("ShowLines", false);
615 ViewState ["ShowLines"] = value;
620 public string SkipLinkText
623 return ViewState.GetString ("SkipLinkText", "Skip Navigation Links.");
626 ViewState ["SkipLinkText"] = value;
632 [DesignerSerializationVisibility (DesignerSerializationVisibility.Hidden)]
633 public TreeNode SelectedNode {
634 get { return selectedNode; }
639 [DesignerSerializationVisibility (DesignerSerializationVisibility.Hidden)]
640 public string SelectedValue {
641 get { return selectedNode != null ? selectedNode.Value : ""; }
645 public string Target {
647 return ViewState.GetString ("Target", "");
650 ViewState ["Target"] = value;
654 [MonoTODO ("why override?")]
655 public override bool Visible
661 base.Visible = value;
666 [DesignerSerializationVisibility (DesignerSerializationVisibility.Hidden)]
667 public TreeNodeCollection CheckedNodes {
669 TreeNodeCollection col = new TreeNodeCollection ();
670 FindCheckedNodes (Nodes, col);
675 void FindCheckedNodes (TreeNodeCollection nodeList, TreeNodeCollection result)
677 foreach (TreeNode node in nodeList) {
678 if (node.Checked) result.Add (node, false);
679 FindCheckedNodes (node.ChildNodes, result);
683 public void ExpandAll ()
685 foreach (TreeNode node in Nodes)
689 public void CollapseAll ()
691 foreach (TreeNode node in Nodes)
695 public TreeNode FindNode (string valuePath)
697 if (valuePath == null) throw new ArgumentNullException ("valuePath");
698 string[] path = valuePath.Split (PathSeparator);
700 TreeNodeCollection col = Nodes;
701 bool foundBranch = true;
702 while (col.Count > 0 && foundBranch) {
704 foreach (TreeNode node in col) {
705 if (node.Value == path [n]) {
706 if (++n == path.Length) return node;
707 col = node.ChildNodes;
716 ImageStyle GetImageStyle ()
718 if (ImageSet != TreeViewImageSet.Custom)
719 return (ImageStyle) imageStyles [ImageSet];
724 protected override HtmlTextWriterTag TagKey {
725 get { return HtmlTextWriterTag.Div; }
728 protected internal virtual TreeNode CreateNode ()
730 return new TreeNode (this);
733 public sealed override void DataBind ()
738 protected void SetNodeDataBound (TreeNode node, bool dataBound)
740 node.SetDataBound (dataBound);
743 protected void SetNodeDataPath (TreeNode node, string dataPath)
745 node.SetDataPath (dataPath);
748 protected void SetNodeDataItem (TreeNode node, object dataItem)
750 node.SetDataItem (dataItem);
753 protected internal override void OnInit (EventArgs e)
758 internal void SetSelectedNode (TreeNode node, bool loading)
760 if (selectedNode == node) return;
761 if (selectedNode != null)
762 selectedNode.SelectedFlag = false;
765 OnSelectedNodeChanged (new TreeNodeEventArgs (selectedNode));
768 internal void NotifyCheckChanged (TreeNode node)
770 OnTreeNodeCheckChanged (new TreeNodeEventArgs (node));
773 internal void NotifyExpandedChanged (TreeNode node)
775 if (node.Expanded.HasValue && node.Expanded.Value)
776 OnTreeNodeExpanded (new TreeNodeEventArgs (node));
777 else if (node.Expanded.HasValue && node.IsParentNode)
778 OnTreeNodeCollapsed (new TreeNodeEventArgs (node));
781 internal void NotifyPopulateRequired (TreeNode node)
783 OnTreeNodePopulate (new TreeNodeEventArgs (node));
786 protected override void TrackViewState()
790 base.TrackViewState();
791 if (hoverNodeStyle != null) {
792 hoverNodeStyle.TrackViewState();
794 if (leafNodeStyle != null) {
795 leafNodeStyle.TrackViewState();
797 if (levelStyles != null && levelStyles.Count > 0) {
798 ((IStateManager)levelStyles).TrackViewState();
800 if (nodeStyle != null) {
801 nodeStyle.TrackViewState();
803 if (parentNodeStyle != null) {
804 parentNodeStyle.TrackViewState();
806 if (rootNodeStyle != null) {
807 rootNodeStyle.TrackViewState();
809 if (selectedNodeStyle != null) {
810 selectedNodeStyle.TrackViewState();
812 if (dataBindings != null) {
813 ((IStateManager)dataBindings).TrackViewState ();
816 ((IStateManager)nodes).TrackViewState();;
820 protected override object SaveViewState()
822 object[] states = new object [10];
823 states[0] = base.SaveViewState();
824 states[1] = (hoverNodeStyle == null ? null : hoverNodeStyle.SaveViewState());
825 states[2] = (leafNodeStyle == null ? null : leafNodeStyle.SaveViewState());
826 states[3] = (levelStyles == null ? null : ((IStateManager)levelStyles).SaveViewState());
827 states[4] = (nodeStyle == null ? null : nodeStyle.SaveViewState());
828 states[5] = (parentNodeStyle == null ? null : parentNodeStyle.SaveViewState());
829 states[6] = (rootNodeStyle == null ? null : rootNodeStyle.SaveViewState());
830 states[7] = (selectedNodeStyle == null ? null : selectedNodeStyle.SaveViewState());
831 states[8] = (dataBindings == null ? null : ((IStateManager)dataBindings).SaveViewState());
832 states[9] = (nodes == null ? null : ((IStateManager)nodes).SaveViewState());
834 for (int i = states.Length - 1; i >= 0; i--) {
835 if (states [i] != null)
842 protected override void LoadViewState (object savedState)
844 if (savedState == null)
847 object [] states = (object []) savedState;
848 base.LoadViewState (states[0]);
850 if (states[1] != null)
851 HoverNodeStyle.LoadViewState (states[1]);
852 if (states[2] != null)
853 LeafNodeStyle.LoadViewState(states[2]);
854 if (states[3] != null)
855 ((IStateManager)LevelStyles).LoadViewState(states[3]);
856 if (states[4] != null)
857 NodeStyle.LoadViewState(states[4]);
858 if (states[5] != null)
859 ParentNodeStyle.LoadViewState(states[5]);
860 if (states[6] != null)
861 RootNodeStyle.LoadViewState(states[6]);
862 if (states[7] != null)
863 SelectedNodeStyle.LoadViewState(states[7]);
864 if (states[8] != null)
865 ((IStateManager)DataBindings).LoadViewState(states[8]);
866 if (states[9] != null)
867 ((IStateManager)Nodes).LoadViewState(states[9]);
870 protected virtual void RaisePostBackEvent (string eventArgument)
872 string[] args = eventArgument.Split ('|');
873 TreeNode node = FindNodeByPos (args[1]);
874 if (node == null) return;
876 if (args [0] == "sel")
877 HandleSelectEvent (node);
878 else if (args [0] == "ec")
879 HandleExpandCollapseEvent (node);
882 void HandleSelectEvent (TreeNode node)
884 switch (node.SelectAction) {
885 case TreeNodeSelectAction.Select:
888 case TreeNodeSelectAction.Expand:
891 case TreeNodeSelectAction.SelectExpand:
898 void HandleExpandCollapseEvent (TreeNode node)
900 node.ToggleExpandState ();
903 protected virtual void RaisePostDataChangedEvent ()
907 string callbackResult;
908 protected virtual void RaiseCallbackEvent (string eventArgs)
910 RequiresDataBinding = true;
913 TreeNode node = FindNodeByPos (eventArgs);
914 ArrayList levelLines = new ArrayList ();
917 int childCount = nd.Parent != null ? nd.Parent.ChildNodes.Count : Nodes.Count;
918 levelLines.Insert (0, (nd.Index < childCount - 1) ? this : null);
922 StringWriter sw = new StringWriter ();
923 HtmlTextWriter writer = new HtmlTextWriter (sw);
924 EnsureStylesPrepared ();
926 node.Expanded = true;
927 int num = node.ChildNodes.Count;
928 for (int n=0; n<num; n++)
929 RenderNode (writer, node.ChildNodes [n], node.Depth + 1, levelLines, true, n<num-1);
931 string res = sw.ToString ();
932 callbackResult = res != "" ? res : "*";
935 protected virtual string GetCallbackResult ()
937 return callbackResult;
940 void IPostBackEventHandler.RaisePostBackEvent (string eventArgument)
942 RaisePostBackEvent (eventArgument);
945 bool IPostBackDataHandler.LoadPostData (string postDataKey, NameValueCollection postCollection)
947 return LoadPostData (postDataKey, postCollection);
950 void IPostBackDataHandler.RaisePostDataChangedEvent ()
952 RaisePostDataChangedEvent ();
955 void ICallbackEventHandler.RaiseCallbackEvent (string eventArgs)
957 RaiseCallbackEvent (eventArgs);
960 string ICallbackEventHandler.GetCallbackResult ()
962 return GetCallbackResult ();
965 protected override ControlCollection CreateControlCollection ()
967 return new EmptyControlCollection (this);
970 protected internal override void PerformDataBinding ()
972 base.PerformDataBinding ();
973 InitializeDataBindings ();
974 HierarchicalDataSourceView data = GetData ("");
978 IHierarchicalEnumerable e = data.Select ();
979 FillBoundChildrenRecursive (e, Nodes);
982 private void FillBoundChildrenRecursive (IHierarchicalEnumerable hEnumerable, TreeNodeCollection nodeCollection) {
983 foreach (object obj in hEnumerable) {
984 IHierarchyData hdata = hEnumerable.GetHierarchyData (obj);
985 TreeNode child = new TreeNode ();
986 nodeCollection.Add (child);
988 OnTreeNodeDataBound (new TreeNodeEventArgs (child));
990 if (MaxDataBindDepth >= 0 && child.Depth == MaxDataBindDepth)
993 if (hdata == null || !hdata.HasChildren)
996 IHierarchicalEnumerable e = hdata.GetChildren ();
997 FillBoundChildrenRecursive (e, child.ChildNodes);
1001 protected virtual bool LoadPostData (string postDataKey, NameValueCollection postCollection)
1005 if (EnableClientScript && PopulateNodesFromClient) {
1006 string states = postCollection [ClientID + "_PopulatedStates"];
1007 if (states != null) {
1008 foreach (string id in states.Split ('|')) {
1009 if (String.IsNullOrEmpty(id))
1011 TreeNode node = FindNodeByPos (id);
1012 if (node != null && node.PopulateOnDemand && !node.Populated)
1019 if (ShowCheckBoxes != TreeNodeTypes.None) {
1020 UnsetCheckStates (Nodes, postCollection);
1021 SetCheckStates (postCollection);
1025 if (EnableClientScript) {
1026 string states = postCollection [ClientID + "_ExpandStates"];
1027 if (states != null) {
1028 string[] ids = states.Split ('|');
1029 UnsetExpandStates (Nodes, ids);
1030 SetExpandStates (ids);
1033 UnsetExpandStates (Nodes, new string[0]);
1039 protected internal override void OnPreRender (EventArgs e)
1041 base.OnPreRender (e);
1045 Page.RegisterRequiresPostBack (this);
1047 if (EnableClientScript && !Page.ClientScript.IsClientScriptIncludeRegistered (typeof(TreeView), "TreeView.js")) {
1048 string url = Page.ClientScript.GetWebResourceUrl (typeof(TreeView), "TreeView.js");
1049 Page.ClientScript.RegisterClientScriptInclude (typeof(TreeView), "TreeView.js", url);
1053 string ctree = ClientID + "_data";
1054 string script = string.Format ("var {0} = new Object ();\n", ctree);
\r
1055 script += string.Format ("{0}.uid = {1};\n", ctree, ClientScriptManager.GetScriptLiteral (UniqueID));
\r
1056 script += string.Format ("{0}.showImage = {1};\n", ctree, ClientScriptManager.GetScriptLiteral (ShowExpandCollapse));
1058 if (ShowExpandCollapse) {
1059 bool defaultImages = ShowLines || ImageSet != TreeViewImageSet.Custom || (ExpandImageUrl == "" && CollapseImageUrl == "");
1060 script += string.Format ("{0}.defaultImages = {1};\n", ctree, ClientScriptManager.GetScriptLiteral (defaultImages));
1061 ImageStyle imageStyle = GetImageStyle ();
1062 if (!defaultImages) {
1063 script += string.Format ("{0}.expandImage = {1};\n", ctree, ClientScriptManager.GetScriptLiteral (GetNodeImageUrl ("plus", imageStyle)));
1064 script += string.Format ("{0}.collapseImage = {1};\n", ctree, ClientScriptManager.GetScriptLiteral (GetNodeImageUrl ("minus", imageStyle)));
1066 if (PopulateNodesFromClient)
1067 script += string.Format ("{0}.noExpandImage = {1};\n", ctree, ClientScriptManager.GetScriptLiteral (GetNodeImageUrl ("noexpand", imageStyle)));
1071 script += string.Format ("{0}.populateFromClient = {1};\n", ctree, ClientScriptManager.GetScriptLiteral (PopulateNodesFromClient));
1072 script += string.Format ("{0}.expandAlt = {1};\n", ctree, ClientScriptManager.GetScriptLiteral (GetNodeImageToolTip (true, null)));
1073 script += string.Format ("{0}.collapseAlt = {1};\n", ctree, ClientScriptManager.GetScriptLiteral (GetNodeImageToolTip (false, null)));
1075 if (!Page.IsPostBack) {
1076 SetNodesExpandedToDepthRecursive (Nodes);
1079 if (EnableClientScript) {
1080 Page.ClientScript.RegisterHiddenField (ClientID + "_ExpandStates", GetExpandStates ());
1082 // Make sure the basic script infrastructure is rendered
1083 Page.ClientScript.GetCallbackEventReference (this, "null", "", "null");
1084 Page.ClientScript.GetPostBackClientHyperlink (this, "");
1087 if (EnableClientScript && PopulateNodesFromClient) {
1088 Page.ClientScript.RegisterHiddenField (ClientID + "_PopulatedStates", "|");
1091 EnsureStylesPrepared ();
1093 if (hoverNodeStyle != null) {
1094 if (Page.Header == null)
1095 throw new InvalidOperationException ("Using TreeView.HoverNodeStyle requires Page.Header to be non-null (e.g. <head runat=\"server\" />).");
1096 RegisterStyle (HoverNodeStyle, HoverNodeLinkStyle);
1097 script += string.Format ("{0}.hoverClass = {1};\n", ctree, ClientScriptManager.GetScriptLiteral (HoverNodeStyle.RegisteredCssClass));
1098 script += string.Format ("{0}.hoverLinkClass = {1};\n", ctree, ClientScriptManager.GetScriptLiteral (HoverNodeLinkStyle.RegisteredCssClass));
1101 Page.ClientScript.RegisterStartupScript (typeof(TreeView), this.UniqueID, script, true);
1105 void EnsureStylesPrepared () {
1108 stylesPrepared = true;
1112 private void PrepareStyles () {
1113 // The order in which styles are defined matters when more than one class
1114 // is assigned to an element
1115 ControlLinkStyle.CopyTextStylesFrom (ControlStyle);
1116 RegisterStyle (ControlLinkStyle);
1118 if (nodeStyle != null)
1119 RegisterStyle (NodeStyle, NodeLinkStyle);
1121 if (rootNodeStyle != null)
1122 RegisterStyle (RootNodeStyle, RootNodeLinkStyle);
1124 if (parentNodeStyle != null)
1125 RegisterStyle (ParentNodeStyle, ParentNodeLinkStyle);
1127 if (leafNodeStyle != null)
1128 RegisterStyle (LeafNodeStyle, LeafNodeLinkStyle);
1131 if (levelStyles != null && levelStyles.Count > 0) {
1132 levelLinkStyles = new List<Style> (levelStyles.Count);
1133 foreach (Style style in levelStyles) {
1134 Style linkStyle = new Style ();
1135 levelLinkStyles.Add (linkStyle);
1136 RegisterStyle (style, linkStyle);
1140 if (selectedNodeStyle != null)
1141 RegisterStyle (SelectedNodeStyle, SelectedNodeLinkStyle);
1144 void SetNodesExpandedToDepthRecursive (TreeNodeCollection nodes) {
1145 foreach (TreeNode node in nodes) {
1146 if (!node.Expanded.HasValue) {
1147 if (ExpandDepth < 0 || node.Depth < ExpandDepth)
1148 node.Expanded = true;
1150 SetNodesExpandedToDepthRecursive (node.ChildNodes);
1154 string IncrementStyleClassName () {
1155 registeredStylesCounter++;
1156 return ClientID + "_" + registeredStylesCounter;
1159 void RegisterStyle (Style baseStyle, Style linkStyle) {
1160 linkStyle.CopyTextStylesFrom (baseStyle);
1161 linkStyle.BorderStyle = BorderStyle.None;
1162 baseStyle.Font.Reset ();
1163 RegisterStyle (linkStyle);
1164 RegisterStyle (baseStyle);
1167 void RegisterStyle (Style baseStyle) {
1168 if (Page.Header == null)
1170 string className = IncrementStyleClassName ().Trim ('_');
1171 baseStyle.SetRegisteredCssClass (className);
1172 Page.Header.StyleSheet.CreateStyleRule (baseStyle, this, "." + className);
1175 string GetBindingKey (string dataMember, int depth)
1177 return dataMember + " " + depth;
1180 void InitializeDataBindings () {
1181 if (dataBindings != null && dataBindings.Count > 0) {
1182 bindings = new Hashtable ();
1183 foreach (TreeNodeBinding bin in dataBindings) {
1184 string key = GetBindingKey (bin.DataMember, bin.Depth);
1185 bindings [key] = bin;
1192 internal TreeNodeBinding FindBindingForNode (string type, int depth)
1194 if (bindings == null)
1197 TreeNodeBinding bin = (TreeNodeBinding) bindings [GetBindingKey (type, depth)];
1198 if (bin != null) return bin;
1200 bin = (TreeNodeBinding) bindings [GetBindingKey (type, -1)];
1201 if (bin != null) return bin;
1203 bin = (TreeNodeBinding) bindings [GetBindingKey ("", depth)];
1204 if (bin != null) return bin;
1206 return (TreeNodeBinding) bindings [GetBindingKey ("", -1)];
1209 internal void DecorateNode(TreeNode node)
1214 if (node.ImageUrl != null && node.ImageUrl.Length > 0)
1217 if (node.IsRootNode && rootNodeStyle != null) {
1218 node.ImageUrl = rootNodeStyle.ImageUrl;
1221 if (node.IsParentNode && parentNodeStyle != null) {
1222 node.ImageUrl = parentNodeStyle.ImageUrl;
1225 if (node.IsLeafNode && leafNodeStyle != null)
1226 node.ImageUrl = leafNodeStyle.ImageUrl;
1229 protected internal override void RenderContents (HtmlTextWriter writer)
1231 ArrayList levelLines = new ArrayList ();
1232 int num = Nodes.Count;
1233 for (int n=0; n<num; n++)
1234 RenderNode (writer, Nodes [n], 0, levelLines, n>0, n<num-1);
1237 protected override void AddAttributesToRender(HtmlTextWriter writer)
1239 base.AddAttributesToRender (writer);
1242 public override void RenderBeginTag (HtmlTextWriter writer)
1244 if (SkipLinkText != "") {
1245 writer.AddAttribute (HtmlTextWriterAttribute.Href, "#" + ClientID + "_SkipLink");
1246 writer.RenderBeginTag (HtmlTextWriterTag.A);
1248 Image img = new Image ();
1249 ClientScriptManager csm = new ClientScriptManager (null);
1250 img.ImageUrl = csm.GetWebResourceUrl (typeof (SiteMapPath), "transparent.gif");
1251 img.Attributes.Add ("height", "0");
1252 img.Attributes.Add ("width", "0");
1253 img.AlternateText = SkipLinkText;
1254 img.Render (writer);
1256 writer.RenderEndTag ();
1258 base.RenderBeginTag (writer);
1261 public override void RenderEndTag (HtmlTextWriter writer)
1263 base.RenderEndTag (writer);
1265 if (SkipLinkText != "") {
1266 writer.AddAttribute (HtmlTextWriterAttribute.Id, ClientID + "_SkipLink");
1267 writer.RenderBeginTag (HtmlTextWriterTag.A);
1268 writer.RenderEndTag ();
1272 void RenderNode (HtmlTextWriter writer, TreeNode node, int level, ArrayList levelLines, bool hasPrevious, bool hasNext)
1277 bool clientExpand = EnableClientScript && Events [TreeNodeCollapsedEvent] == null && Events [TreeNodeExpandedEvent] == null;
1278 ImageStyle imageStyle = GetImageStyle ();
1279 bool renderChildNodes = node.Expanded.HasValue && node.Expanded.Value;
1281 if (clientExpand && !renderChildNodes)
1282 renderChildNodes = (!node.PopulateOnDemand || node.Populated);
1286 if (renderChildNodes)
1287 hasChildNodes = node.ChildNodes.Count > 0;
1289 hasChildNodes = (node.PopulateOnDemand && !node.Populated) || node.ChildNodes.Count > 0;
1291 writer.AddAttribute ("cellpadding", "0");
1292 writer.AddAttribute ("cellspacing", "0");
1293 writer.AddStyleAttribute ("border-width", "0");
1294 writer.RenderBeginTag (HtmlTextWriterTag.Table);
1296 Unit nodeSpacing = GetNodeSpacing (node);
1298 if (nodeSpacing != Unit.Empty && (node.Depth > 0 || node.Index > 0))
1299 RenderMenuItemSpacing (writer, nodeSpacing);
1301 writer.RenderBeginTag (HtmlTextWriterTag.Tr);
1303 // Vertical lines from previous levels
1305 nodeImage = GetNodeImageUrl ("i", imageStyle);
1306 for (int n=0; n<level; n++) {
1307 writer.RenderBeginTag (HtmlTextWriterTag.Td);
1308 writer.AddStyleAttribute ("width", NodeIndent + "px");
1309 writer.AddStyleAttribute ("height", "1px");
1310 writer.RenderBeginTag (HtmlTextWriterTag.Div);
1311 if (ShowLines && levelLines [n] != null) {
1312 writer.AddAttribute ("src", nodeImage);
1313 writer.AddAttribute (HtmlTextWriterAttribute.Alt, "");
1314 writer.RenderBeginTag (HtmlTextWriterTag.Img);
1315 writer.RenderEndTag ();
1317 writer.RenderEndTag ();
1318 writer.RenderEndTag (); // TD
1321 // Node image + line
1323 if (ShowExpandCollapse || ShowLines) {
1324 bool buttonImage = false;
1325 string tooltip = "";
1329 if (hasPrevious && hasNext) shape = "t";
1330 else if (hasPrevious && !hasNext) shape = "l";
1331 else if (!hasPrevious && hasNext) shape = "r";
1332 else shape = "dash";
1335 if (ShowExpandCollapse) {
1336 if (hasChildNodes) {
1338 if (node.Expanded.HasValue && node.Expanded.Value) shape += "minus";
1339 else shape += "plus";
1340 tooltip = GetNodeImageToolTip (!(node.Expanded.HasValue && node.Expanded.Value), node.Text);
1341 } else if (!ShowLines)
1346 nodeImage = GetNodeImageUrl (shape, imageStyle);
1347 writer.RenderBeginTag (HtmlTextWriterTag.Td); // TD
1350 if (!clientExpand || (!PopulateNodesFromClient && node.PopulateOnDemand && !node.Populated))
1351 writer.AddAttribute ("href", GetClientEvent (node, "ec"));
1353 writer.AddAttribute ("href", GetClientExpandEvent(node));
1354 writer.RenderBeginTag (HtmlTextWriterTag.A); // Anchor
1357 writer.AddAttribute ("alt", tooltip);
1359 if (buttonImage && clientExpand)
1360 writer.AddAttribute ("id", GetNodeClientId (node, "img"));
1361 writer.AddAttribute ("src", nodeImage);
1363 writer.AddStyleAttribute (HtmlTextWriterStyle.BorderWidth, "0");
1364 writer.RenderBeginTag (HtmlTextWriterTag.Img);
1365 writer.RenderEndTag ();
1368 writer.RenderEndTag (); // Anchor
1370 writer.RenderEndTag (); // TD
1376 string imageUrl = node.ImageUrl.Length > 0 ? ResolveClientUrl (node.ImageUrl) : null;
1377 if (String.IsNullOrEmpty (imageUrl) && imageStyle != null) {
1378 if (imageStyle.RootIcon != null && node.IsRootNode)
1379 imageUrl = GetNodeIconUrl (imageStyle.RootIcon);
1380 else if (imageStyle.ParentIcon != null && node.IsParentNode)
1381 imageUrl = GetNodeIconUrl (imageStyle.ParentIcon);
1382 else if (imageStyle.LeafIcon != null && node.IsLeafNode)
1383 imageUrl = GetNodeIconUrl (imageStyle.LeafIcon);
1386 if (level < LevelStyles.Count && LevelStyles [level].ImageUrl != null)
1387 imageUrl = ResolveClientUrl (LevelStyles [level].ImageUrl);
1389 if (!String.IsNullOrEmpty (imageUrl)) {
1390 writer.RenderBeginTag (HtmlTextWriterTag.Td); // TD
1391 BeginNodeTag (writer, node, clientExpand);
1392 writer.AddAttribute ("src", imageUrl);
1393 writer.AddStyleAttribute (HtmlTextWriterStyle.BorderWidth, "0");
1394 writer.AddAttribute ("alt", node.ImageToolTip);
1395 writer.RenderBeginTag (HtmlTextWriterTag.Img);
1396 writer.RenderEndTag (); // IMG
1397 writer.RenderEndTag (); // style tag
1398 writer.RenderEndTag (); // TD
1402 writer.AddStyleAttribute ("white-space", "nowrap");
1403 AddNodeStyle (writer, node, level);
1404 if (EnableClientScript) {
1405 writer.AddAttribute ("onmouseout", "TreeView_UnhoverNode(this)");
1406 writer.AddAttribute ("onmouseover", "TreeView_HoverNode('" + ClientID + "', this)");
1408 writer.RenderBeginTag (HtmlTextWriterTag.Td); // TD
1413 if (node.ShowCheckBox.HasValue)
1414 showChecks = node.ShowCheckBox.Value;
1416 showChecks = (ShowCheckBoxes == TreeNodeTypes.All) ||
1417 ((ShowCheckBoxes & TreeNodeTypes.Leaf) > 0 && node.IsLeafNode) ||
1418 ((ShowCheckBoxes & TreeNodeTypes.Parent) > 0 && node.IsParentNode && node.Parent != null) ||
1419 ((ShowCheckBoxes & TreeNodeTypes.Root) > 0 && node.Parent == null && node.ChildNodes.Count > 0);
1422 writer.AddAttribute ("name", ClientID + "_cs_" + node.Path);
1423 writer.AddAttribute ("type", "checkbox");
1424 writer.AddAttribute ("title", node.Text);
1425 if (node.Checked) writer.AddAttribute ("checked", "checked");
1426 writer.RenderBeginTag (HtmlTextWriterTag.Input); // INPUT
1427 writer.RenderEndTag (); // INPUT
1432 node.BeginRenderText (writer);
1435 writer.AddAttribute ("id", GetNodeClientId (node, "txt"));
1436 AddNodeLinkStyle (writer, node, level);
1437 BeginNodeTag (writer, node, clientExpand);
1438 writer.Write (node.Text);
1439 writer.RenderEndTag (); // style tag
1441 node.EndRenderText (writer);
1443 writer.RenderEndTag (); // TD
1445 writer.RenderEndTag (); // TR
1447 if (nodeSpacing != Unit.Empty)
1448 RenderMenuItemSpacing (writer, nodeSpacing);
1450 writer.RenderEndTag (); // TABLE
1456 if (level >= levelLines.Count) {
1457 if (hasNext) levelLines.Add (this);
1458 else levelLines.Add (null);
1460 if (hasNext) levelLines [level] = this;
1461 else levelLines [level] = null;
1465 if (!(node.Expanded.HasValue && node.Expanded.Value)) writer.AddStyleAttribute ("display", "none");
1466 else writer.AddStyleAttribute ("display", "block");
1467 writer.AddAttribute ("id", GetNodeClientId (node, null));
1468 writer.RenderBeginTag (HtmlTextWriterTag.Span);
1470 if (renderChildNodes) {
1471 int num = node.ChildNodes.Count;
1472 for (int n=0; n<num; n++)
1473 RenderNode (writer, node.ChildNodes [n], level + 1, levelLines, true, n<num-1);
1475 writer.RenderEndTag (); // SPAN
1477 else if (renderChildNodes) {
1478 int num = node.ChildNodes.Count;
1479 for (int n=0; n<num; n++)
1480 RenderNode (writer, node.ChildNodes [n], level + 1, levelLines, true, n<num-1);
1485 private void RenderMenuItemSpacing (HtmlTextWriter writer, Unit itemSpacing) {
1486 writer.AddStyleAttribute ("height", itemSpacing.ToString ());
1487 writer.RenderBeginTag (HtmlTextWriterTag.Tr);
1488 writer.RenderBeginTag (HtmlTextWriterTag.Td);
1489 writer.RenderEndTag ();
1490 writer.RenderEndTag ();
1493 private Unit GetNodeSpacing (TreeNode node) {
1494 if (node.Selected && selectedNodeStyle != null && selectedNodeStyle.NodeSpacing != Unit.Empty) {
1495 return selectedNodeStyle.NodeSpacing;
1498 if (levelStyles != null && node.Depth < levelStyles.Count && levelStyles [node.Depth].NodeSpacing != Unit.Empty) {
1499 return levelStyles [node.Depth].NodeSpacing;
1502 if (node.IsLeafNode) {
1503 if (leafNodeStyle != null && leafNodeStyle.NodeSpacing != Unit.Empty)
1504 return leafNodeStyle.NodeSpacing;
1506 else if (node.IsRootNode) {
1507 if (rootNodeStyle != null && rootNodeStyle.NodeSpacing != Unit.Empty)
1508 return rootNodeStyle.NodeSpacing;
1510 else if (node.IsParentNode) {
1511 if (parentNodeStyle != null && parentNodeStyle.NodeSpacing != Unit.Empty)
1512 return parentNodeStyle.NodeSpacing;
1515 if (nodeStyle != null)
1516 return nodeStyle.NodeSpacing;
1521 void AddNodeStyle (HtmlTextWriter writer, TreeNode node, int level)
1523 TreeNodeStyle style = new TreeNodeStyle ();
1524 if (Page.Header != null) {
1525 // styles are registered
1526 if (nodeStyle != null) {
1527 style.AddCssClass (nodeStyle.CssClass);
1528 style.AddCssClass (nodeStyle.RegisteredCssClass);
1530 if (node.IsLeafNode) {
1531 if (leafNodeStyle != null) {
1532 style.AddCssClass (leafNodeStyle.CssClass);
1533 style.AddCssClass (leafNodeStyle.RegisteredCssClass);
1536 else if (node.IsRootNode) {
1537 if (rootNodeStyle != null) {
1538 style.AddCssClass (rootNodeStyle.CssClass);
1539 style.AddCssClass (rootNodeStyle.RegisteredCssClass);
1542 else if (node.IsParentNode) {
1543 if (parentNodeStyle != null) {
1544 style.AddCssClass (parentNodeStyle.CssClass);
1545 style.AddCssClass (parentNodeStyle.RegisteredCssClass);
1548 if (levelStyles != null && levelStyles.Count > level) {
1549 style.AddCssClass (levelStyles [level].CssClass);
1550 style.AddCssClass (levelStyles [level].RegisteredCssClass);
1552 if (node == SelectedNode && selectedNodeStyle != null) {
1553 style.AddCssClass (selectedNodeStyle.CssClass);
1554 style.AddCssClass (selectedNodeStyle.RegisteredCssClass);
1558 // styles are not registered
1559 if (nodeStyle != null) {
1560 style.CopyFrom (nodeStyle);
1562 if (node.IsLeafNode) {
1563 if (leafNodeStyle != null) {
1564 style.CopyFrom (leafNodeStyle);
1567 else if (node.IsRootNode) {
1568 if (rootNodeStyle != null) {
1569 style.CopyFrom (rootNodeStyle);
1572 else if (node.IsParentNode) {
1573 if (parentNodeStyle != null) {
1574 style.CopyFrom (parentNodeStyle);
1577 if (levelStyles != null && levelStyles.Count > level) {
1578 style.CopyFrom (levelStyles [level]);
1580 if (node == SelectedNode && selectedNodeStyle != null) {
1581 style.CopyFrom (selectedNodeStyle);
1584 style.AddAttributesToRender (writer);
1587 void AddNodeLinkStyle (HtmlTextWriter writer, TreeNode node, int level) {
1588 Style style = new Style ();
1589 if (Page.Header != null) {
1590 // styles are registered
1591 style.AddCssClass (ControlLinkStyle.RegisteredCssClass);
1593 if (nodeStyle != null) {
1594 style.AddCssClass (nodeLinkStyle.CssClass);
1595 style.AddCssClass (nodeLinkStyle.RegisteredCssClass);
1597 if (node.IsLeafNode) {
1598 if (leafNodeStyle != null) {
1599 style.AddCssClass (leafNodeLinkStyle.CssClass);
1600 style.AddCssClass (leafNodeLinkStyle.RegisteredCssClass);
1603 else if (node.IsRootNode) {
1604 if (rootNodeStyle != null) {
1605 style.AddCssClass (rootNodeLinkStyle.CssClass);
1606 style.AddCssClass (rootNodeLinkStyle.RegisteredCssClass);
1609 else if (node.IsParentNode) {
1610 if (parentNodeStyle != null) {
1611 style.AddCssClass (parentNodeLinkStyle.CssClass);
1612 style.AddCssClass (parentNodeLinkStyle.RegisteredCssClass);
1615 if (levelStyles != null && levelStyles.Count > level) {
1616 style.AddCssClass (levelLinkStyles [level].CssClass);
1617 style.AddCssClass (levelLinkStyles [level].RegisteredCssClass);
1619 if (node == SelectedNode && selectedNodeStyle != null) {
1620 style.AddCssClass (selectedNodeLinkStyle.CssClass);
1621 style.AddCssClass (selectedNodeLinkStyle.RegisteredCssClass);
1625 // styles are not registered
1626 style.CopyFrom (ControlLinkStyle);
1627 if (nodeStyle != null) {
1628 style.CopyFrom (nodeLinkStyle);
1630 if (node.IsLeafNode) {
1631 if (node.IsLeafNode && leafNodeStyle != null) {
1632 style.CopyFrom (leafNodeLinkStyle);
1635 else if (node.IsRootNode) {
1636 if (node.IsRootNode && rootNodeStyle != null) {
1637 style.CopyFrom (rootNodeLinkStyle);
1640 else if (node.IsParentNode) {
1641 if (node.IsParentNode && parentNodeStyle != null) {
1642 style.CopyFrom (parentNodeLinkStyle);
1645 if (levelStyles != null && levelStyles.Count > level) {
1646 style.CopyFrom (levelLinkStyles [level]);
1648 if (node == SelectedNode && selectedNodeStyle != null) {
1649 style.CopyFrom (selectedNodeLinkStyle);
1651 style.AlwaysRenderTextDecoration = true;
1653 style.AddAttributesToRender (writer);
1656 void BeginNodeTag (HtmlTextWriter writer, TreeNode node, bool clientExpand)
1658 if(node.ToolTip.Length>0)
1659 writer.AddAttribute ("title", node.ToolTip);
1661 if (node.NavigateUrl != "") {
1662 writer.AddAttribute ("href", ResolveClientUrl (node.NavigateUrl));
1663 if (node.Target.Length > 0)
1664 writer.AddAttribute ("target", node.Target);
1665 else if (Target.Length > 0)
1666 writer.AddAttribute ("target", Target);
1667 writer.RenderBeginTag (HtmlTextWriterTag.A);
1669 else if (node.SelectAction != TreeNodeSelectAction.None) {
1670 if (node.SelectAction == TreeNodeSelectAction.Expand && clientExpand)
1671 writer.AddAttribute ("href", GetClientExpandEvent (node));
1673 writer.AddAttribute ("href", GetClientEvent (node, "sel"));
1674 writer.RenderBeginTag (HtmlTextWriterTag.A);
1677 writer.RenderBeginTag (HtmlTextWriterTag.Span);
1680 string GetNodeImageToolTip (bool expand, string txt) {
1682 if (ExpandImageToolTip != "")
1683 return String.Format (ExpandImageToolTip, txt);
1684 else if (txt != null)
1685 return "Expand " + txt;
1687 return "Expand {0}";
1689 if (CollapseImageToolTip != "")
1690 return String.Format (CollapseImageToolTip, txt);
1691 else if (txt != null)
1692 return "Collapse " + txt;
1694 return "Collapse {0}";
1698 string GetNodeClientId (TreeNode node, string sufix)
1700 return ClientID + "_" + node.Path + (sufix != null ? "_" + sufix : "");
1703 string GetNodeImageUrl (string shape, ImageStyle imageStyle)
1706 if (!String.IsNullOrEmpty (LineImagesFolder))
1707 return ResolveClientUrl (LineImagesFolder + "/" + shape + ".gif");
1709 if (imageStyle != null) {
1710 if (shape == "plus") {
1711 if (!String.IsNullOrEmpty (imageStyle.Expand))
1712 return GetNodeIconUrl (imageStyle.Expand);
1714 else if (shape == "minus") {
1715 if (!String.IsNullOrEmpty (imageStyle.Collapse))
1716 return GetNodeIconUrl (imageStyle.Collapse);
1718 else if (shape == "noexpand") {
1719 if (!String.IsNullOrEmpty (imageStyle.NoExpand))
1720 return GetNodeIconUrl (imageStyle.NoExpand);
1724 if (shape == "plus") {
1725 if (!String.IsNullOrEmpty (ExpandImageUrl))
1726 return ResolveClientUrl (ExpandImageUrl);
1728 else if (shape == "minus") {
1729 if (!String.IsNullOrEmpty (CollapseImageUrl))
1730 return ResolveClientUrl (CollapseImageUrl);
1732 else if (shape == "noexpand") {
1733 if (!String.IsNullOrEmpty (NoExpandImageUrl))
1734 return ResolveClientUrl (NoExpandImageUrl);
1737 if (!String.IsNullOrEmpty (LineImagesFolder))
1738 return ResolveClientUrl (LineImagesFolder + "/" + shape + ".gif");
1740 return AssemblyResourceLoader.GetResourceUrl (typeof(TreeView), "TreeView_" + shape + ".gif");
1743 string GetNodeIconUrl (string icon)
1745 return AssemblyResourceLoader.GetResourceUrl (typeof(TreeView), icon + ".gif");
1748 string GetClientEvent (TreeNode node, string ev)
1750 return Page.ClientScript.GetPostBackClientHyperlink (this, ev + "|" + node.Path, true);
1753 string GetClientExpandEvent (TreeNode node)
1755 return "javascript:TreeView_ToggleExpand ('" + ClientID + "', '" + node.Path + "')";
1758 TreeNode FindNodeByPos (string path)
1760 string[] indexes = path.Split ('_');
1761 TreeNode node = null;
1763 foreach (string index in indexes) {
1764 int i = int.Parse (index);
1766 if (i >= Nodes.Count) return null;
1769 if (i >= node.ChildNodes.Count) return null;
1770 node = node.ChildNodes [i];
1776 void UnsetCheckStates (TreeNodeCollection col, NameValueCollection states)
1778 foreach (TreeNode node in col) {
1780 string val = states [ClientID + "_cs_" + node.Path];
1781 if (val != "on") node.Checked = false;
1783 if (node.HasChildData)
1784 UnsetCheckStates (node.ChildNodes, states);
1788 void SetCheckStates (NameValueCollection states)
1790 string keyPrefix = ClientID + "_cs_";
1791 foreach (string key in states) {
1792 if (key.StartsWith (keyPrefix)) {
1793 string id = key.Substring (keyPrefix.Length);
1794 TreeNode node = FindNodeByPos (id);
1796 node.Checked = (Context.Request.Form [key] == "on");
1801 void UnsetExpandStates (TreeNodeCollection col, string[] states)
1803 foreach (TreeNode node in col) {
1804 if (node.Expanded.HasValue && node.Expanded.Value) {
1805 bool expand = (Array.IndexOf (states, node.Path) != -1);
1806 if (!expand) node.Expanded = false;
1808 if (node.HasChildData)
1809 UnsetExpandStates (node.ChildNodes, states);
1813 void SetExpandStates (string[] states)
1815 foreach (string id in states) {
1816 if (id == null || id == "") continue;
1817 TreeNode node = FindNodeByPos (id);
1819 node.Expanded = true;
1823 string GetExpandStates ()
1825 StringBuilder sb = new StringBuilder ("|");
1827 foreach (TreeNode node in Nodes)
1828 GetExpandStates (sb, node);
1830 return sb.ToString ();
1833 void GetExpandStates (StringBuilder sb, TreeNode node)
1835 if (node.Expanded.HasValue && node.Expanded.Value) {
1836 sb.Append (node.Path);
1839 if (node.HasChildData) {
1840 foreach (TreeNode child in node.ChildNodes)
1841 GetExpandStates (sb, child);