├── .gitattributes ├── .gitignore ├── Icon ├── VirtualTreeView.ai └── VirtualTreeView.png ├── LICENSE ├── README.md ├── Test ├── VirtualTreeViewDemo │ ├── App.config │ ├── App.xaml │ ├── App.xaml.cs │ ├── DemoItem.cs │ ├── ErrorItem.cs │ ├── MainWindow.xaml │ ├── MainWindow.xaml.cs │ ├── VirtualTreeView.ico │ └── VirtualTreeViewDemo.csproj └── VirtualTreeViewTest │ ├── Properties │ └── AssemblyInfo.cs │ └── VirtualTreeViewTest.csproj ├── VirtualTreeView.sln ├── VirtualTreeView.sln.DotSettings ├── VirtualTreeView ├── Collection │ ├── FlatCollection.cs │ ├── FlatNode.cs │ ├── IHierarchicalSource.cs │ ├── IndexedCollection.cs │ └── NotifyCollectionChangedExtensions.cs ├── ItemHierarchicalSource.cs ├── ItemsControlItemPropertyReader.cs ├── ItemsSourceHierarchicalSource.cs ├── MarginConverter.cs ├── Properties │ ├── AssemblyInfo.cs │ └── VirtualTreeView.snk ├── Reflection │ └── ObjectExtensions.cs ├── RowsVirtualizingPanel.cs ├── Themes │ └── Generic.xaml ├── VirtualTreeView.cs ├── VirtualTreeView.csproj ├── VirtualTreeView.ico ├── VirtualTreeViewItem.cs ├── VirtualTreeViewItemHolder.cs └── VirtualTreeViewSelectionMode.cs └── appveyor.yml /.gitattributes: -------------------------------------------------------------------------------- 1 | ############################################################################### 2 | # Set default behavior to automatically normalize line endings. 3 | ############################################################################### 4 | * text=auto 5 | 6 | ############################################################################### 7 | # Set default behavior for command prompt diff. 8 | # 9 | # This is need for earlier builds of msysgit that does not have it on by 10 | # default for csharp files. 11 | # Note: This is only used by command line 12 | ############################################################################### 13 | #*.cs diff=csharp 14 | 15 | ############################################################################### 16 | # Set the merge driver for project and solution files 17 | # 18 | # Merging from the command prompt will add diff markers to the files if there 19 | # are conflicts (Merging from VS is not affected by the settings below, in VS 20 | # the diff markers are never inserted). Diff markers may cause the following 21 | # file extensions to fail to load in VS. An alternative would be to treat 22 | # these files as binary and thus will always conflict and require user 23 | # intervention with every merge. To do so, just uncomment the entries below 24 | ############################################################################### 25 | #*.sln merge=binary 26 | #*.csproj merge=binary 27 | #*.vbproj merge=binary 28 | #*.vcxproj merge=binary 29 | #*.vcproj merge=binary 30 | #*.dbproj merge=binary 31 | #*.fsproj merge=binary 32 | #*.lsproj merge=binary 33 | #*.wixproj merge=binary 34 | #*.modelproj merge=binary 35 | #*.sqlproj merge=binary 36 | #*.wwaproj merge=binary 37 | 38 | ############################################################################### 39 | # behavior for image files 40 | # 41 | # image files are treated as binary by default. 42 | ############################################################################### 43 | #*.jpg binary 44 | #*.png binary 45 | #*.gif binary 46 | 47 | ############################################################################### 48 | # diff behavior for common document formats 49 | # 50 | # Convert binary document formats to text before diffing them. This feature 51 | # is only available from the command line. Turn it on by uncommenting the 52 | # entries below. 53 | ############################################################################### 54 | #*.doc diff=astextplain 55 | #*.DOC diff=astextplain 56 | #*.docx diff=astextplain 57 | #*.DOCX diff=astextplain 58 | #*.dot diff=astextplain 59 | #*.DOT diff=astextplain 60 | #*.pdf diff=astextplain 61 | #*.PDF diff=astextplain 62 | #*.rtf diff=astextplain 63 | #*.RTF diff=astextplain 64 | -------------------------------------------------------------------------------- /.gitignore: -------------------------------------------------------------------------------- 1 | ## Ignore Visual Studio temporary files, build results, and 2 | ## files generated by popular Visual Studio add-ons. 3 | 4 | # User-specific files 5 | *.suo 6 | *.user 7 | *.userosscache 8 | *.sln.docstates 9 | 10 | # User-specific files (MonoDevelop/Xamarin Studio) 11 | *.userprefs 12 | 13 | # Build results 14 | [Dd]ebug/ 15 | [Dd]ebugPublic/ 16 | [Rr]elease/ 17 | [Rr]eleases/ 18 | x64/ 19 | x86/ 20 | bld/ 21 | [Bb]in/ 22 | [Oo]bj/ 23 | [Ll]og/ 24 | 25 | # Visual Studio 2015 cache/options directory 26 | .vs/ 27 | # Uncomment if you have tasks that create the project's static files in wwwroot 28 | #wwwroot/ 29 | 30 | # MSTest test Results 31 | [Tt]est[Rr]esult*/ 32 | [Bb]uild[Ll]og.* 33 | 34 | # NUNIT 35 | *.VisualState.xml 36 | TestResult.xml 37 | 38 | # Build Results of an ATL Project 39 | [Dd]ebugPS/ 40 | [Rr]eleasePS/ 41 | dlldata.c 42 | 43 | # DNX 44 | project.lock.json 45 | artifacts/ 46 | 47 | *_i.c 48 | *_p.c 49 | *_i.h 50 | *.ilk 51 | *.meta 52 | *.obj 53 | *.pch 54 | *.pdb 55 | *.pgc 56 | *.pgd 57 | *.rsp 58 | *.sbr 59 | *.tlb 60 | *.tli 61 | *.tlh 62 | *.tmp 63 | *.tmp_proj 64 | *.log 65 | *.vspscc 66 | *.vssscc 67 | .builds 68 | *.pidb 69 | *.svclog 70 | *.scc 71 | 72 | # Chutzpah Test files 73 | _Chutzpah* 74 | 75 | # Visual C++ cache files 76 | ipch/ 77 | *.aps 78 | *.ncb 79 | *.opendb 80 | *.opensdf 81 | *.sdf 82 | *.cachefile 83 | *.VC.db 84 | *.VC.VC.opendb 85 | 86 | # Visual Studio profiler 87 | *.psess 88 | *.vsp 89 | *.vspx 90 | *.sap 91 | 92 | # TFS 2012 Local Workspace 93 | $tf/ 94 | 95 | # Guidance Automation Toolkit 96 | *.gpState 97 | 98 | # ReSharper is a .NET coding add-in 99 | _ReSharper*/ 100 | *.[Rr]e[Ss]harper 101 | *.DotSettings.user 102 | 103 | # JustCode is a .NET coding add-in 104 | .JustCode 105 | 106 | # TeamCity is a build add-in 107 | _TeamCity* 108 | 109 | # DotCover is a Code Coverage Tool 110 | *.dotCover 111 | 112 | # NCrunch 113 | _NCrunch_* 114 | .*crunch*.local.xml 115 | nCrunchTemp_* 116 | 117 | # MightyMoose 118 | *.mm.* 119 | AutoTest.Net/ 120 | 121 | # Web workbench (sass) 122 | .sass-cache/ 123 | 124 | # Installshield output folder 125 | [Ee]xpress/ 126 | 127 | # DocProject is a documentation generator add-in 128 | DocProject/buildhelp/ 129 | DocProject/Help/*.HxT 130 | DocProject/Help/*.HxC 131 | DocProject/Help/*.hhc 132 | DocProject/Help/*.hhk 133 | DocProject/Help/*.hhp 134 | DocProject/Help/Html2 135 | DocProject/Help/html 136 | 137 | # Click-Once directory 138 | publish/ 139 | 140 | # Publish Web Output 141 | *.[Pp]ublish.xml 142 | *.azurePubxml 143 | # TODO: Comment the next line if you want to checkin your web deploy settings 144 | # but database connection strings (with potential passwords) will be unencrypted 145 | *.pubxml 146 | *.publishproj 147 | 148 | # Microsoft Azure Web App publish settings. Comment the next line if you want to 149 | # checkin your Azure Web App publish settings, but sensitive information contained 150 | # in these scripts will be unencrypted 151 | PublishScripts/ 152 | 153 | # NuGet Packages 154 | *.nupkg 155 | # The packages folder can be ignored because of Package Restore 156 | **/packages/* 157 | # except build/, which is used as an MSBuild target. 158 | !**/packages/build/ 159 | # Uncomment if necessary however generally it will be regenerated when needed 160 | #!**/packages/repositories.config 161 | # NuGet v3's project.json files produces more ignoreable files 162 | *.nuget.props 163 | *.nuget.targets 164 | 165 | # Microsoft Azure Build Output 166 | csx/ 167 | *.build.csdef 168 | 169 | # Microsoft Azure Emulator 170 | ecf/ 171 | rcf/ 172 | 173 | # Windows Store app package directories and files 174 | AppPackages/ 175 | BundleArtifacts/ 176 | Package.StoreAssociation.xml 177 | _pkginfo.txt 178 | 179 | # Visual Studio cache files 180 | # files ending in .cache can be ignored 181 | *.[Cc]ache 182 | # but keep track of directories ending in .cache 183 | !*.[Cc]ache/ 184 | 185 | # Others 186 | ClientBin/ 187 | ~$* 188 | *~ 189 | *.dbmdl 190 | *.dbproj.schemaview 191 | *.pfx 192 | *.publishsettings 193 | node_modules/ 194 | orleans.codegen.cs 195 | 196 | # Since there are multiple workflows, uncomment next line to ignore bower_components 197 | # (https://github.com/github/gitignore/pull/1529#issuecomment-104372622) 198 | #bower_components/ 199 | 200 | # RIA/Silverlight projects 201 | Generated_Code/ 202 | 203 | # Backup & report files from converting an old project file 204 | # to a newer Visual Studio version. Backup files are not needed, 205 | # because we have git ;-) 206 | _UpgradeReport_Files/ 207 | Backup*/ 208 | UpgradeLog*.XML 209 | UpgradeLog*.htm 210 | 211 | # SQL Server files 212 | *.mdf 213 | *.ldf 214 | 215 | # Business Intelligence projects 216 | *.rdl.data 217 | *.bim.layout 218 | *.bim_*.settings 219 | 220 | # Microsoft Fakes 221 | FakesAssemblies/ 222 | 223 | # GhostDoc plugin setting file 224 | *.GhostDoc.xml 225 | 226 | # Node.js Tools for Visual Studio 227 | .ntvs_analysis.dat 228 | 229 | # Visual Studio 6 build log 230 | *.plg 231 | 232 | # Visual Studio 6 workspace options file 233 | *.opt 234 | 235 | # Visual Studio LightSwitch build output 236 | **/*.HTMLClient/GeneratedArtifacts 237 | **/*.DesktopClient/GeneratedArtifacts 238 | **/*.DesktopClient/ModelManifest.xml 239 | **/*.Server/GeneratedArtifacts 240 | **/*.Server/ModelManifest.xml 241 | _Pvt_Extensions 242 | 243 | # Paket dependency manager 244 | .paket/paket.exe 245 | paket-files/ 246 | 247 | # FAKE - F# Make 248 | .fake/ 249 | 250 | # JetBrains Rider 251 | .idea/ 252 | *.sln.iml 253 | -------------------------------------------------------------------------------- /Icon/VirtualTreeView.ai: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/picrap/VirtualTreeView/820c52d82397f41ea8eff0c959110e6dc45cf8ec/Icon/VirtualTreeView.ai -------------------------------------------------------------------------------- /Icon/VirtualTreeView.png: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/picrap/VirtualTreeView/820c52d82397f41ea8eff0c959110e6dc45cf8ec/Icon/VirtualTreeView.png -------------------------------------------------------------------------------- /LICENSE: -------------------------------------------------------------------------------- 1 | MIT License 2 | 3 | Copyright (c) 2016 Pascal Craponne 4 | 5 | Permission is hereby granted, free of charge, to any person obtaining a copy 6 | of this software and associated documentation files (the "Software"), to deal 7 | in the Software without restriction, including without limitation the rights 8 | to use, copy, modify, merge, publish, distribute, sublicense, and/or sell 9 | copies of the Software, and to permit persons to whom the Software is 10 | furnished to do so, subject to the following conditions: 11 | 12 | The above copyright notice and this permission notice shall be included in all 13 | copies or substantial portions of the Software. 14 | 15 | THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 16 | IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 17 | FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE 18 | AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 19 | LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 20 | OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE 21 | SOFTWARE. 22 | -------------------------------------------------------------------------------- /README.md: -------------------------------------------------------------------------------- 1 | # VirtualTreeView 2 | 3 | A virtualizing TreeView for .NET Framezork 4.6.2, .NET 6 and .NET 8 4 | 5 | ## How to use it 6 | 7 | It is available as a [NuGet package](https://www.nuget.org/packages/VirtualTreeView/). 8 | The source code includes a demonstration application, where both modes (content and binding) are showed, side-by-side to traditional `TreeView` control. 9 | 10 | ### The treeview itself 11 | 12 | It works exactly as the original `TreeView` (with a lot of missing features...): 13 | 14 | ```xaml 15 | 16 | 17 | 18 | 19 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 31 | 32 | 33 | ``` 34 | 35 | ### The treeview item 36 | 37 | If you move from an existing treeView, you'll need to copy/paste your `TreeViewItem` style and adapt it to `vtv:TreeViewItem` (usually no change is required, except removing the hierarchical part, which is generated when the control converts the tree to a list). 38 | 39 | ### What does work 40 | 41 | Currently it has only the features I needed (which is showing items and let them live); all contributors are welcome. The goal is to have a complete and extensible tree view. 42 | * With binding, `INotifyCollectionChanged` fully works, so you can dynamically change content by adding or removing elements at any point of the hierarchy. 43 | 44 | ### What does not 45 | 46 | * With binding, `INotifyPropertyChanged` **does not work at all**, since the binding is partly simulated (because the view items are not generated). 47 | 48 | ### How to contribute 49 | 50 | Fork it, update it, and submit your pull requests. 51 | Alternatively you can [submit requests](https://github.com/picrap/VirtualTreeView/issues). 52 | -------------------------------------------------------------------------------- /Test/VirtualTreeViewDemo/App.config: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | 5 | 6 | 7 | -------------------------------------------------------------------------------- /Test/VirtualTreeViewDemo/App.xaml: -------------------------------------------------------------------------------- 1 |  6 | 7 | 8 | 9 | 10 | -------------------------------------------------------------------------------- /Test/VirtualTreeViewDemo/App.xaml.cs: -------------------------------------------------------------------------------- 1 | using System.Windows; 2 | 3 | namespace VirtualTreeViewDemo 4 | { 5 | /// 6 | /// Interaction logic for App.xaml 7 | /// 8 | public partial class App : Application 9 | { 10 | } 11 | } 12 | -------------------------------------------------------------------------------- /Test/VirtualTreeViewDemo/DemoItem.cs: -------------------------------------------------------------------------------- 1 | // VirtualTreeView - a TreeView that *actually* allows virtualization 2 | // https://github.com/picrap/VirtualTreeView 3 | 4 | namespace VirtualTreeViewDemo 5 | { 6 | using System; 7 | using System.Collections.ObjectModel; 8 | using System.Diagnostics; 9 | 10 | [DebuggerDisplay("{" + nameof(Label) + "}")] 11 | public class DemoItem 12 | { 13 | private readonly ObservableCollection _children = new ObservableCollection(); 14 | 15 | public ObservableCollection Children => _children; 16 | 17 | public bool IsExpanded { get; set; } 18 | 19 | public string Label { get; set; } 20 | 21 | private static ObservableCollection _root; 22 | public static ObservableCollection Root 23 | { 24 | get 25 | { 26 | if (_root == null) 27 | _root = CreateItems(2, null); 28 | return _root; 29 | } 30 | set 31 | { 32 | _root.Clear(); 33 | foreach (var item in value) 34 | _root.Add(item); 35 | } 36 | } 37 | 38 | private static ObservableCollection _root2; 39 | 40 | public static ObservableCollection Root2 41 | { 42 | get 43 | { 44 | if (_root2 == null) 45 | _root2 = CreateItems(2, null); 46 | return _root2; 47 | } 48 | set 49 | { 50 | _root2.Clear(); 51 | foreach (var item in value) 52 | _root2.Add(item); 53 | } 54 | } 55 | 56 | public static ObservableCollection CreateItems(int depth, DemoItem parent, int seed = 0, int labelIndex = 0) => CreateItems(new Random(seed), parent, 0, depth, labelIndex); 57 | 58 | private static ObservableCollection CreateItems(Random random, DemoItem parent, int depth, int maxDepth, int labelIndex = 0) 59 | { 60 | int itemsCount = random.Next((int)Math.Pow(10, depth + 1)); 61 | var items = new ObservableCollection(); 62 | for (int itemIndex = 0; itemIndex < itemsCount; itemIndex++) 63 | { 64 | if (random.Next(11) == 0) 65 | { 66 | var errorItem = new ErrorItem(); 67 | items.Add(errorItem); 68 | } 69 | else 70 | { 71 | var item = new DemoItem(); 72 | item.Label = (parent != null ? parent.Label + "." : "") + ++labelIndex; 73 | item.IsExpanded = random.Next(5) == 0; 74 | items.Add(item); 75 | if (depth < maxDepth) 76 | { 77 | foreach (var childItem in CreateItems(random, item, depth + 1, maxDepth)) 78 | item._children.Add(childItem); 79 | } 80 | } 81 | } 82 | return items; 83 | } 84 | } 85 | } -------------------------------------------------------------------------------- /Test/VirtualTreeViewDemo/ErrorItem.cs: -------------------------------------------------------------------------------- 1 | // VirtualTreeView - a TreeView that *actually* allows virtualization 2 | // https://github.com/picrap/VirtualTreeView 3 | 4 | namespace VirtualTreeViewDemo 5 | { 6 | public class ErrorItem 7 | { 8 | } 9 | } -------------------------------------------------------------------------------- /Test/VirtualTreeViewDemo/MainWindow.xaml: -------------------------------------------------------------------------------- 1 |  10 | 11 | 12 | 19 | 30 | 37 | 44 | 45 | 46 | 47 | 48 | 49 | 50 | 51 | 52 | 53 | 54 | 55 | 56 | 57 | 58 | 59 | 60 | 61 | 62 | 63 | 64 | 65 | 66 | 67 | 68 | 69 | 70 | 71 | 72 | 73 | 74 | 75 | 76 | 77 | 78 | 79 | 80 | 81 | 82 | 83 | 84 | 85 | 86 | 87 | 88 | 89 | 90 | 91 | 92 | 93 | 94 | 95 | 96 | 97 | 98 | 99 | 100 | 101 | 102 | 103 | 104 | 105 | 106 | 107 | 108 | 109 | 110 | 111 | 112 | 113 | 114 | 115 | 118 | 119 | 120 | 121 | 122 | 123 | 124 | 125 | 126 | 127 | 128 | 129 | 130 | 131 | 132 | 133 | 134 | 137 | 138 | 139 | 140 | 141 | Admire slowness of original TreeView 142 | (you can also admire memory use from task manager) 143 | 144 | 145 | 146 | 147 | 148 | 149 | 150 | 151 | 152 | 153 | 154 | 155 | 156 | 157 | 158 | 159 | 162 | 163 | 164 | 165 | 166 |