├── .gitattributes ├── .gitignore ├── Build ├── SimpleMvvmToolkit.Express.1.0.0-rc2.nupkg ├── SimpleMvvmToolkit.Express.1.0.0.nupkg ├── SimpleMvvmToolkit.Express.2.0.0-beta.nupkg └── SimpleMvvmToolkit.Express.2.0.0.nupkg ├── Images ├── simple-icon-sm.png ├── simple-icon.ico ├── simple-icon.jpg ├── simple-icon.png ├── simple-logo.jpg ├── simple-logo.png └── simple-preview.png ├── LICENSE ├── README.md ├── Snippets ├── Code Snippets │ ├── mvvmcommand.snippet │ ├── mvvmcommandcanex.snippet │ └── mvvmprop.snippet ├── ReadMe.md └── Xml Snippets │ ├── mvvmcontext.snippet │ ├── mvvmtrigger.snippet │ └── mvvmxmlns.snippet └── Src ├── SimpleMvvmToolkit.Express.sln └── SimpleMvvmToolkit.Express ├── DelegateCommand.cs ├── GenericDelegateCommand.cs ├── INotifyable.cs ├── MessageBus.cs ├── MessageBusProxy.cs ├── ModelBase.cs ├── ModelExtensions.cs ├── NotificationEventArgs.cs ├── Properties └── AssemblyInfo.cs ├── SimpleMvvmToolkit.Express.csproj ├── ViewModelBase.cs └── ViewModelDetailBase.cs /.gitattributes: -------------------------------------------------------------------------------- 1 | *.doc diff=astextplain 2 | *.DOC diff=astextplain 3 | *.docx diff=astextplain 4 | *.DOCX diff=astextplain 5 | *.dot diff=astextplain 6 | *.DOT diff=astextplain 7 | *.pdf diff=astextplain 8 | *.PDF diff=astextplain 9 | *.rtf diff=astextplain 10 | *.RTF diff=astextplain 11 | 12 | *.jpg binary 13 | *.png binary 14 | *.gif binary 15 | *.bson binary 16 | 17 | *.cs text diff=csharp 18 | *.vb text 19 | *.c text 20 | *.cpp text 21 | *.cxx text 22 | *.h text 23 | *.hxx text 24 | *.py text 25 | *.rb text 26 | *.java text 27 | *.html text 28 | *.htm text 29 | *.css text 30 | *.scss text 31 | *.sass text 32 | *.less text 33 | *.js text 34 | *.lisp text 35 | *.clj text 36 | *.sql text 37 | *.php text 38 | *.lua text 39 | *.m text 40 | *.asm text 41 | *.erl text 42 | *.fs text 43 | *.fsx text 44 | *.hs text 45 | *.ps1 text 46 | *.psm1 text 47 | 48 | *.csproj text merge=union 49 | *.vbproj text merge=union 50 | *.fsproj text merge=union 51 | *.dbproj text merge=union 52 | *.sln text eol=crlf merge=union 53 | -------------------------------------------------------------------------------- /.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 | 24 | # Visual Studio 2015 cache/options directory 25 | .vs/ 26 | # Uncomment if you have tasks that create the project's static files in wwwroot 27 | #wwwroot/ 28 | 29 | # MSTest test Results 30 | [Tt]est[Rr]esult*/ 31 | [Bb]uild[Ll]og.* 32 | 33 | # NUNIT 34 | *.VisualState.xml 35 | TestResult.xml 36 | 37 | # Build Results of an ATL Project 38 | [Dd]ebugPS/ 39 | [Rr]eleasePS/ 40 | dlldata.c 41 | 42 | # DNX 43 | project.lock.json 44 | artifacts/ 45 | 46 | *_i.c 47 | *_p.c 48 | *_i.h 49 | *.ilk 50 | *.meta 51 | *.obj 52 | *.pch 53 | *.pdb 54 | *.pgc 55 | *.pgd 56 | *.rsp 57 | *.sbr 58 | *.tlb 59 | *.tli 60 | *.tlh 61 | *.tmp 62 | *.tmp_proj 63 | *.log 64 | *.vspscc 65 | *.vssscc 66 | .builds 67 | *.pidb 68 | *.svclog 69 | *.scc 70 | 71 | # Chutzpah Test files 72 | _Chutzpah* 73 | 74 | # Visual C++ cache files 75 | ipch/ 76 | *.aps 77 | *.ncb 78 | *.opendb 79 | *.opensdf 80 | *.sdf 81 | *.cachefile 82 | 83 | # Visual Studio profiler 84 | *.psess 85 | *.vsp 86 | *.vspx 87 | *.sap 88 | 89 | # TFS 2012 Local Workspace 90 | $tf/ 91 | 92 | # Guidance Automation Toolkit 93 | *.gpState 94 | 95 | # ReSharper is a .NET coding add-in 96 | _ReSharper*/ 97 | *.[Rr]e[Ss]harper 98 | *.DotSettings.user 99 | 100 | # JustCode is a .NET coding add-in 101 | .JustCode 102 | 103 | # TeamCity is a build add-in 104 | _TeamCity* 105 | 106 | # DotCover is a Code Coverage Tool 107 | *.dotCover 108 | 109 | # NCrunch 110 | _NCrunch_* 111 | .*crunch*.local.xml 112 | nCrunchTemp_* 113 | 114 | # MightyMoose 115 | *.mm.* 116 | AutoTest.Net/ 117 | 118 | # Web workbench (sass) 119 | .sass-cache/ 120 | 121 | # Installshield output folder 122 | [Ee]xpress/ 123 | 124 | # DocProject is a documentation generator add-in 125 | DocProject/buildhelp/ 126 | DocProject/Help/*.HxT 127 | DocProject/Help/*.HxC 128 | DocProject/Help/*.hhc 129 | DocProject/Help/*.hhk 130 | DocProject/Help/*.hhp 131 | DocProject/Help/Html2 132 | DocProject/Help/html 133 | 134 | # Click-Once directory 135 | publish/ 136 | 137 | # Publish Web Output 138 | *.[Pp]ublish.xml 139 | *.azurePubxml 140 | # TODO: Comment the next line if you want to checkin your web deploy settings 141 | # but database connection strings (with potential passwords) will be unencrypted 142 | *.pubxml 143 | *.publishproj 144 | 145 | # NuGet Packages 146 | *.nupkg 147 | # The packages folder can be ignored because of Package Restore 148 | **/packages/* 149 | # except build/, which is used as an MSBuild target. 150 | !**/packages/build/ 151 | # Uncomment if necessary however generally it will be regenerated when needed 152 | #!**/packages/repositories.config 153 | # NuGet v3's project.json files produces more ignoreable files 154 | *.nuget.props 155 | *.nuget.targets 156 | 157 | # Microsoft Azure Build Output 158 | csx/ 159 | *.build.csdef 160 | 161 | # Microsoft Azure Emulator 162 | ecf/ 163 | rcf/ 164 | 165 | # Microsoft Azure ApplicationInsights config file 166 | ApplicationInsights.config 167 | 168 | # Windows Store app package directory 169 | AppPackages/ 170 | BundleArtifacts/ 171 | 172 | # Visual Studio cache files 173 | # files ending in .cache can be ignored 174 | *.[Cc]ache 175 | # but keep track of directories ending in .cache 176 | !*.[Cc]ache/ 177 | 178 | # Others 179 | ClientBin/ 180 | ~$* 181 | *~ 182 | *.dbmdl 183 | *.dbproj.schemaview 184 | *.pfx 185 | *.publishsettings 186 | node_modules/ 187 | orleans.codegen.cs 188 | 189 | # RIA/Silverlight projects 190 | Generated_Code/ 191 | 192 | # Backup & report files from converting an old project file 193 | # to a newer Visual Studio version. Backup files are not needed, 194 | # because we have git ;-) 195 | _UpgradeReport_Files/ 196 | Backup*/ 197 | UpgradeLog*.XML 198 | UpgradeLog*.htm 199 | 200 | # SQL Server files 201 | *.mdf 202 | *.ldf 203 | 204 | # Business Intelligence projects 205 | *.rdl.data 206 | *.bim.layout 207 | *.bim_*.settings 208 | 209 | # Microsoft Fakes 210 | FakesAssemblies/ 211 | 212 | # GhostDoc plugin setting file 213 | *.GhostDoc.xml 214 | 215 | # Node.js Tools for Visual Studio 216 | .ntvs_analysis.dat 217 | 218 | # Visual Studio 6 build log 219 | *.plg 220 | 221 | # Visual Studio 6 workspace options file 222 | *.opt 223 | 224 | # Visual Studio LightSwitch build output 225 | **/*.HTMLClient/GeneratedArtifacts 226 | **/*.DesktopClient/GeneratedArtifacts 227 | **/*.DesktopClient/ModelManifest.xml 228 | **/*.Server/GeneratedArtifacts 229 | **/*.Server/ModelManifest.xml 230 | _Pvt_Extensions 231 | 232 | # Paket dependency manager 233 | .paket/paket.exe 234 | 235 | # FAKE - F# Make 236 | .fake/ 237 | 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-------------------------------------------------------------------------------- 1 | The MIT License (MIT) 2 | 3 | Copyright (c) 2016 Tony Sneed 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 | # Simple MVVM Toolkit Express 2 | 3 | ## Streamlined version of Simple MVVM Toolkit targeting the .NET Standard 2.0 4 | 5 | This library is compatible with the [.NET Standard](https://docs.microsoft.com/en-us/dotnet/standard/net-standard) 2.0 specification, which supports the following platforms (or higher): 6 | - **.NET Framework 4.6.1** 7 | - **.NET Core 2.0** 8 | - **Mono 5.4** 9 | - **Xamarin.iOS 10.14** 10 | - **Xamarin.Mac 3.8** 11 | - **Xamarin.Android 8.0** 12 | - **Universal Windows Platform 10.0.16299** 13 | 14 | The following platforms will **not** be supported: 15 | - *Windows 8.1* 16 | - *Windows Phone 8.1* 17 | - *Windows Phone Silverlight* 18 | - *.NET 4.0 or earlier* 19 | - *Silverlight* 20 | 21 | If you require support for any of these platforms, please use the prior version of Simple MVVM Toolkit. 22 | 23 | Because cross-threading concerns are generally handled by `Task` and `async/await`, threading support will be removed. 24 | This will allow removal of platform-specific implementations that were required for cross-thread marshalling. 25 | 26 | Object cloning will be implemented using **Json.Net**, rather than Data Contract Serializer. 27 | The Json.Net serializer is configured *programmatically* to handle cyclical references. 28 | -------------------------------------------------------------------------------- /Snippets/Code Snippets/mvvmcommand.snippet: -------------------------------------------------------------------------------- 1 |  2 | 3 | 4 |
5 | 6 | Expansion 7 | 8 | Command Property 9 | Tony Sneed 10 | Command Property 11 | 12 | 13 | mvvmcommand 14 |
15 | 16 | 17 | 18 | ParameterName 19 | Parameter Name 20 | <object> 21 | 22 | 23 | 24 | 25 | FieldName 26 | Field Name 27 | myMethod 28 | 29 | 30 | 31 | 32 | MethodName 33 | Method Name 34 | MyMethod 35 | 36 | 37 | 38 | 39 | 45 | 46 | 47 | -------------------------------------------------------------------------------- /Snippets/Code Snippets/mvvmcommandcanex.snippet: -------------------------------------------------------------------------------- 1 |  2 | 3 | 4 |
5 | 6 | Expansion 7 | 8 | Command Property With CanExecute 9 | Tony Sneed 10 | Command Property With CanExecute 11 | 12 | 13 | mvvmcommandcanex 14 |
15 | 16 | 17 | 18 | ParameterName 19 | Parameter Name 20 | object 21 | 22 | 23 | 24 | 25 | FieldName 26 | Field Name 27 | myMethod 28 | 29 | 30 | 31 | 32 | MethodName 33 | Method Name 34 | MyMethod 35 | 36 | 37 | 38 | 39 | $FieldName$Command; 40 | public DelegateCommand<$ParameterName$> $MethodName$Command 41 | { 42 | get 43 | { 44 | if ($FieldName$Command == null) $FieldName$Command = 45 | new DelegateCommand<$ParameterName$>($MethodName$, Can$MethodName$); 46 | return $FieldName$Command; 47 | } 48 | private set { $FieldName$Command = value; } 49 | }]]> 50 | 51 | 52 | -------------------------------------------------------------------------------- /Snippets/Code Snippets/mvvmprop.snippet: -------------------------------------------------------------------------------- 1 |  2 | 3 | 4 |
5 | 6 | Expansion 7 | 8 | Bindable Model or View-Model Property 9 | Tony Sneed 10 | Bindable Model or ViewModel Property 11 | 12 | 13 | mvvmprop 14 |
15 | 16 | 17 | 18 | type 19 | Property Type 20 | int 21 | 22 | 23 | 24 | 25 | field 26 | Private Field 27 | _myProperty 28 | 29 | 30 | 31 | 32 | m 33 | Lambda Parameter 34 | m 35 | 36 | 37 | 38 | 39 | property 40 | Property Name 41 | MyProperty 42 | 43 | 44 | 45 | 46 | $m$.$property$); 54 | } 55 | }]]> 56 | 57 | 58 | -------------------------------------------------------------------------------- /Snippets/ReadMe.md: -------------------------------------------------------------------------------- 1 | # Simple MVVM Toolkit Express: Code Snippets 2 | 3 | *Instructions for installing the code snippets for Simple MVVM Toolkit Express* 4 | 5 | 1. In Visual Studio 2015, select **Tools**, **Code Snippets Manager** 6 | 7 | 2. Select the **CSharp** language 8 | - Click the *Add* button to add the C# code snippets 9 | 10 | 3. Select the **XAML** language 11 | - Click the *Add* button to add the XML snippets 12 | -------------------------------------------------------------------------------- /Snippets/Xml Snippets/mvvmcontext.snippet: -------------------------------------------------------------------------------- 1 |  2 | 3 | 4 |
5 | 6 | Expansion 7 | 8 | mvvmcontext 9 | Tony Sneed 10 | DataContext for ViewModel 11 | 12 | 13 | mvvmcontext 14 |
15 | 16 | 17 | 18 | 19 | 20 | MyViewModel 21 | ViewModel Name 22 | MyViewModel 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | -------------------------------------------------------------------------------- /Snippets/Xml Snippets/mvvmtrigger.snippet: -------------------------------------------------------------------------------- 1 |  2 | 3 | 4 |
5 | 6 | Expansion 7 | 8 | mvvmtrigger 9 | Tony 10 | Insert Blend event trigger / action 11 | 12 | 13 | mvvmtrigger 14 |
15 | 16 | 17 | 18 | 19 | 20 | event_name 21 | Event Name 22 | Click 23 | 24 | 25 | 26 | 27 | method_name 28 | Method Name 29 | MyMethod 30 | 31 | 32 | 33 | 34 | 35 | 36 | 37 | 38 | 41 | 42 | $end$]]> 43 | 44 | 45 | -------------------------------------------------------------------------------- /Snippets/Xml Snippets/mvvmxmlns.snippet: -------------------------------------------------------------------------------- 1 |  2 | 3 | 4 |
5 | 6 | Expansion 7 | 8 | mvvmxmlns 9 | Tony Sneed 10 | XML namespaces for Blend behaviors 11 | 12 | 13 | mvvmxmlns 14 |
15 | 16 | 17 | 18 | 20 | 21 | 22 | -------------------------------------------------------------------------------- /Src/SimpleMvvmToolkit.Express.sln: -------------------------------------------------------------------------------- 1 |  2 | Microsoft Visual Studio Solution File, Format Version 12.00 3 | # Visual Studio Version 16 4 | VisualStudioVersion = 16.0.29318.209 5 | MinimumVisualStudioVersion = 10.0.40219.1 6 | Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "Solution Items", "Solution Items", "{3A1CFEC2-818F-4257-BE74-500887B1A9D9}" 7 | ProjectSection(SolutionItems) = preProject 8 | ..\README.md = ..\README.md 9 | EndProjectSection 10 | EndProject 11 | Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "SimpleMvvmToolkit.Express", "SimpleMvvmToolkit.Express\SimpleMvvmToolkit.Express.csproj", "{8073FF79-D552-4C54-A27C-2467B991760F}" 12 | EndProject 13 | Global 14 | GlobalSection(SolutionConfigurationPlatforms) = preSolution 15 | Debug|Any CPU = Debug|Any CPU 16 | Release|Any CPU = Release|Any CPU 17 | EndGlobalSection 18 | GlobalSection(ProjectConfigurationPlatforms) = postSolution 19 | {8073FF79-D552-4C54-A27C-2467B991760F}.Debug|Any CPU.ActiveCfg = Debug|Any CPU 20 | {8073FF79-D552-4C54-A27C-2467B991760F}.Debug|Any CPU.Build.0 = Debug|Any CPU 21 | {8073FF79-D552-4C54-A27C-2467B991760F}.Release|Any CPU.ActiveCfg = Release|Any CPU 22 | {8073FF79-D552-4C54-A27C-2467B991760F}.Release|Any CPU.Build.0 = Release|Any CPU 23 | EndGlobalSection 24 | GlobalSection(SolutionProperties) = preSolution 25 | HideSolutionNode = FALSE 26 | EndGlobalSection 27 | GlobalSection(ExtensibilityGlobals) = postSolution 28 | SolutionGuid = {3644FA0E-1919-4C9C-BD08-2B6B8064D754} 29 | EndGlobalSection 30 | EndGlobal 31 | -------------------------------------------------------------------------------- /Src/SimpleMvvmToolkit.Express/DelegateCommand.cs: -------------------------------------------------------------------------------- 1 | using System; 2 | using System.Windows.Input; 3 | 4 | namespace SimpleMvvmToolkit.Express 5 | { 6 | /// 7 | /// Provide a command that can bind to ButtonBase.Command 8 | /// without accepting command parameters for Execute and CanExecute. 9 | /// 10 | public class DelegateCommand : ICommand 11 | { 12 | private readonly Func _canExecute; 13 | private readonly Action _executeAction; 14 | 15 | /// 16 | /// Event fired when CanExecute changes. 17 | /// 18 | public event EventHandler CanExecuteChanged; 19 | 20 | /// 21 | /// Constructor 22 | /// 23 | /// Action to be executed. 24 | /// Flag indicating whether action can be executed. 25 | public DelegateCommand(Action executeAction, 26 | Func canExecute) 27 | { 28 | _executeAction = executeAction; 29 | _canExecute = canExecute; 30 | } 31 | 32 | /// 33 | /// DelegateCommand constructor. 34 | /// 35 | /// Action to be executed. 36 | public DelegateCommand(Action executeAction) 37 | { 38 | _executeAction = executeAction; 39 | _canExecute = () => true; 40 | } 41 | 42 | /// 43 | /// Method to fire CanExecuteChanged event. 44 | /// 45 | public void RaiseCanExecuteChanged() 46 | { 47 | CanExecuteChanged?.Invoke(this, EventArgs.Empty); 48 | } 49 | 50 | /// 51 | /// Flag indicating whether action can be executed. 52 | /// 53 | /// Argument for action. 54 | /// True if action can be executed. 55 | public bool CanExecute(object parameter) 56 | { 57 | return _canExecute == null || _canExecute(); 58 | } 59 | 60 | /// 61 | /// Execute action. 62 | /// 63 | /// Argument for action. 64 | public void Execute(object parameter) 65 | { 66 | _executeAction(); 67 | } 68 | } 69 | } 70 | -------------------------------------------------------------------------------- /Src/SimpleMvvmToolkit.Express/GenericDelegateCommand.cs: -------------------------------------------------------------------------------- 1 | using System; 2 | using System.Linq; 3 | using System.Reflection; 4 | using System.Windows.Input; 5 | 6 | namespace SimpleMvvmToolkit.Express 7 | { 8 | /// 9 | /// Provide a command that can bind to ButtonBase.Command 10 | /// and accept command parameters for Execute and CanExecute. 11 | /// 12 | /// 13 | public class DelegateCommand : ICommand 14 | { 15 | private readonly Func _canExecute; 16 | private readonly Action _executeAction; 17 | 18 | /// 19 | /// Notification for when CanExecute property has changed. 20 | /// 21 | public event EventHandler CanExecuteChanged; 22 | 23 | /// 24 | /// DelegateCommand constructor. 25 | /// 26 | /// Action to be executed. 27 | /// Flag indicating whether action can be executed. 28 | public DelegateCommand(Action executeAction, 29 | Func canExecute) 30 | { 31 | _executeAction = executeAction; 32 | _canExecute = canExecute; 33 | } 34 | 35 | /// 36 | /// DelegateCommand constructor. 37 | /// 38 | /// Action to be executed. 39 | public DelegateCommand(Action executeAction) 40 | { 41 | _executeAction = executeAction; 42 | _canExecute = x => true; 43 | } 44 | 45 | /// 46 | /// Method to fire CanExecuteChanged event. 47 | /// 48 | public void RaiseCanExecuteChanged() 49 | { 50 | CanExecuteChanged?.Invoke(this, EventArgs.Empty); 51 | } 52 | 53 | /// 54 | /// Flag indicating whether action can be executed. 55 | /// 56 | /// Argument for action. 57 | /// True if action can be executed. 58 | public bool CanExecute(object parameter) 59 | { 60 | if (parameter == null) return true; 61 | T param = ConvertParameter(parameter); 62 | return _canExecute == null || _canExecute(param); 63 | } 64 | 65 | /// 66 | /// Execute action. 67 | /// 68 | /// Argument for action. 69 | public void Execute(object parameter) 70 | { 71 | T param = ConvertParameter(parameter); 72 | _executeAction(param); 73 | } 74 | 75 | // Convert parameter to expected type, parsing if necessary 76 | private T ConvertParameter(object parameter) 77 | { 78 | if (parameter == null) return default(T); 79 | 80 | string exceptionMessage = $"Cannot convert {parameter.GetType()} to {typeof(T)}"; 81 | 82 | T result = default(T); 83 | if (parameter is T) 84 | { 85 | result = (T)parameter; 86 | } 87 | else if (parameter is string) 88 | { 89 | MethodInfo mi = (from m in typeof(T).GetRuntimeMethods() 90 | where m.IsPublic && m.IsStatic && 91 | m.Name == "Parse" && m.GetParameters().Count() == 1 92 | select m).FirstOrDefault(); 93 | if (mi != null) 94 | { 95 | try 96 | { 97 | result = (T)mi.Invoke(null, new object[] { parameter }); 98 | } 99 | catch (Exception ex) 100 | { 101 | if (ex.InnerException != null) throw ex.InnerException; 102 | throw new InvalidCastException(exceptionMessage); 103 | } 104 | } 105 | } 106 | else 107 | { 108 | throw new InvalidCastException(exceptionMessage); 109 | } 110 | return result; 111 | } 112 | } 113 | } 114 | -------------------------------------------------------------------------------- /Src/SimpleMvvmToolkit.Express/INotifyable.cs: -------------------------------------------------------------------------------- 1 | namespace SimpleMvvmToolkit.Express 2 | { 3 | /// 4 | /// Implemented by MessageBusProxy so that it can send notifications in a leak-proof manner. 5 | /// 6 | public interface INotifyable 7 | { 8 | /// 9 | /// Notify registered callbacks. 10 | /// 11 | /// String identifying a message token 12 | /// Sender of notification 13 | /// Event args carrying message 14 | void Notify(string token, object sender, NotificationEventArgs e); 15 | } 16 | } 17 | -------------------------------------------------------------------------------- /Src/SimpleMvvmToolkit.Express/MessageBus.cs: -------------------------------------------------------------------------------- 1 | using System; 2 | using System.Collections.Generic; 3 | using System.Diagnostics; 4 | using System.Linq; 5 | using System.Threading.Tasks; 6 | 7 | namespace SimpleMvvmToolkit.Express 8 | { 9 | /// 10 | /// Facilitates communication among view-models. 11 | /// To prevent memory leaks weak references are used. 12 | /// 13 | public class MessageBus 14 | { 15 | private static MessageBus _instance; 16 | private static readonly object StaticLock = new object(); 17 | 18 | /// 19 | /// Singleton of MessageBus. 20 | /// 21 | public static MessageBus Default 22 | { 23 | get 24 | { 25 | if (_instance == null) 26 | { 27 | CreateInstance(); 28 | } 29 | return _instance; 30 | } 31 | } 32 | 33 | private static void CreateInstance() 34 | { 35 | lock (StaticLock) 36 | { 37 | if (_instance == null) 38 | { 39 | _instance = new MessageBus(); 40 | } 41 | } 42 | } 43 | 44 | // Provide thread-safe access to subscriptions 45 | private readonly object _sharedLock = new object(); 46 | 47 | // Each token can have multiple subscriptions 48 | private readonly Dictionary> _subscriptions = 49 | new Dictionary>(); 50 | 51 | /// 52 | /// Register subscriber using a string token, which is usually defined as a constant. 53 | /// Subscriber performs internal notifications. 54 | /// 55 | /// String identifying a message token 56 | /// Subscriber requesting notifications 57 | public void Register(string token, INotifyable subscriber) 58 | { 59 | lock (_sharedLock) 60 | { 61 | // Add token if not present 62 | if (!_subscriptions.ContainsKey(token)) 63 | { 64 | _subscriptions.Add(token, new List { new WeakReference(subscriber) }); 65 | return; 66 | } 67 | 68 | // Get subscribers for this token 69 | List weakSubscribers; 70 | if (_subscriptions.TryGetValue(token, out weakSubscribers)) 71 | { 72 | // See if subcriber is already present 73 | var existing = (from w in weakSubscribers 74 | where w != null && w.IsAlive && 75 | ReferenceEquals(w.Target, subscriber) 76 | select w).SingleOrDefault(); 77 | 78 | // Add if subcriber is already present 79 | if (existing == null) 80 | _subscriptions[token].Add(new WeakReference(subscriber)); 81 | } 82 | } 83 | } 84 | 85 | /// 86 | /// Remove subscriber from the invocation list 87 | /// 88 | /// String identifying a message token 89 | /// Subscriber to remove from notifications 90 | public void Unregister(string token, INotifyable subscriber) 91 | { 92 | lock (_sharedLock) 93 | { 94 | List weakSubscribers; 95 | if (_subscriptions.TryGetValue(token, out weakSubscribers)) 96 | { 97 | // Find subscriber 98 | WeakReference weakSubscriber = weakSubscribers 99 | .SingleOrDefault(w => w.IsAlive && ReferenceEquals 100 | (w.Target, subscriber)); 101 | 102 | // Remove subscriber 103 | if (weakSubscriber != null) 104 | weakSubscribers.Remove(weakSubscriber); 105 | 106 | // Remove dictionary entry if no subscibers left 107 | if (_subscriptions[token].Count == 0) _subscriptions.Remove(token); 108 | } 109 | } 110 | } 111 | 112 | /// 113 | /// Notify registered subscribers. 114 | /// 115 | /// String identifying a message token 116 | /// Sender of notification 117 | /// Event args carrying message 118 | public void Notify(string token, object sender, NotificationEventArgs e) 119 | { 120 | // Notify subscriber on UI thread 121 | InternalNotify(token, sender, e, true); 122 | } 123 | 124 | /// 125 | /// Notify registered subscribers. 126 | /// 127 | /// Type used by notifier to send data 128 | /// String identifying a message token 129 | /// Sender of notification 130 | /// Event args carrying message 131 | public void Notify(string token, object sender, 132 | NotificationEventArgs e) 133 | { 134 | // Notify subscriber on UI thread 135 | InternalNotify(token, sender, e, true); 136 | } 137 | 138 | /// 139 | /// Notify registered subscribers. 140 | /// 141 | /// Type used by notifier to send data 142 | /// Type sent by subscriber to send data back to notifier 143 | /// String identifying a message token 144 | /// Sender of notification 145 | /// Event args carrying message 146 | public void Notify(string token, object sender, 147 | NotificationEventArgs e) 148 | { 149 | // Notify subscriber on UI thread 150 | InternalNotify(token, sender, e, true); 151 | } 152 | 153 | /// 154 | /// Notify registered subscribers asynchronously. 155 | /// 156 | /// String identifying a message token 157 | /// Sender of notification 158 | /// Event args carrying message 159 | public void BeginNotify(string token, object sender, NotificationEventArgs e) 160 | { 161 | // Notify subscriber on ThreadPool thread 162 | InternalNotify(token, sender, e, false); 163 | } 164 | 165 | /// 166 | /// Notify registered subscribers asynchronously. 167 | /// 168 | /// Type used by notifier to send data 169 | /// String identifying a message token 170 | /// Sender of notification 171 | /// Event args carrying message 172 | public void BeginNotify(string token, object sender, 173 | NotificationEventArgs e) 174 | { 175 | // Notify subscriber on ThreadPool thread 176 | InternalNotify(token, sender, e, false); 177 | } 178 | 179 | /// 180 | /// Notify registered subscribers asynchronously. 181 | /// 182 | /// Type used by notifier to send data 183 | /// Type sent by subscriber to send data back to notifier 184 | /// String identifying a message token 185 | /// Sender of notification 186 | /// Event args carrying message 187 | public void BeginNotify(string token, object sender, 188 | NotificationEventArgs e) 189 | { 190 | // Notify subscriber on ThreadPool thread 191 | InternalNotify(token, sender, e, false); 192 | } 193 | 194 | private void InternalNotify(string token, object sender, 195 | NotificationEventArgs e, bool post) 196 | { 197 | // Get weak subscribers 198 | List weakSubscribers; 199 | lock (_sharedLock) 200 | { 201 | if (!_subscriptions.TryGetValue(token, out weakSubscribers)) return; 202 | 203 | // Make a copy while locked 204 | weakSubscribers = weakSubscribers.ToList(); 205 | } 206 | 207 | // Get compatible living subscribers 208 | var subscribers = from w in weakSubscribers 209 | let s = w.Target as INotifyable 210 | where w != null && w.IsAlive && s != null 211 | select s; 212 | 213 | // Invoke each callback associated with token 214 | foreach (var subscriber in subscribers) 215 | { 216 | INotifyable subscriber1 = subscriber; 217 | SafeNotify(() => subscriber1.Notify(token, sender, e)); 218 | } 219 | 220 | lock (_sharedLock) 221 | { 222 | if (_subscriptions.ContainsKey(token)) 223 | { 224 | // Remove subscribers who are no longer alive 225 | var deadSubscribers = weakSubscribers 226 | .Where(w => w == null || !w.IsAlive); 227 | foreach (var s in deadSubscribers) 228 | { 229 | _subscriptions[token].Remove(s); 230 | } 231 | 232 | // Remove dictionary entry if no subscibers left 233 | if (_subscriptions[token].Count == 0) _subscriptions.Remove(token); 234 | } 235 | } 236 | } 237 | 238 | private void SafeNotify(Action method) 239 | { 240 | try 241 | { 242 | Task.Run(method); 243 | } 244 | catch (Exception ex) 245 | { 246 | // If there's an exception write it to the Output window 247 | Debug.WriteLine(ex.ToString()); 248 | } 249 | } 250 | } 251 | } 252 | -------------------------------------------------------------------------------- /Src/SimpleMvvmToolkit.Express/MessageBusProxy.cs: -------------------------------------------------------------------------------- 1 | using System; 2 | using System.Collections.Generic; 3 | using System.Linq; 4 | 5 | namespace SimpleMvvmToolkit.Express 6 | { 7 | /// 8 | /// Handles communication with the MessageBus. 9 | /// ViewModelBase stores this internally. 10 | /// 11 | internal class MessageBusProxy : INotifyable 12 | { 13 | // Provide thread-safe access to subscriptions 14 | private readonly object _sharedLock = new object(); 15 | 16 | // Each token can have multiple callbacks 17 | private readonly Dictionary> _subscriptions = 18 | new Dictionary>(); 19 | 20 | /// 21 | /// Register callback using a string token, which is usually defined as a constant 22 | /// 23 | /// String identifying a message token 24 | /// Method to invoke when notified 25 | public void Register(string token, EventHandler callback) 26 | { 27 | InternalRegister(token, callback, typeof(NotificationEventArgs)); 28 | } 29 | 30 | /// 31 | /// Register callback using string token and notification with TOutgoing data 32 | /// 33 | /// Type used by notifier to send data 34 | /// String identifying a message token 35 | /// Method to invoke when notified 36 | public void Register(string token, 37 | EventHandler> callback) 38 | { 39 | InternalRegister(token, callback, typeof(NotificationEventArgs)); 40 | } 41 | 42 | /// 43 | /// Register callback using string token and notification with TOutgoing data 44 | /// and the subscriber's callback with TIncoming data. 45 | /// 46 | /// Type used by notifier to send data 47 | /// Type sent by subscriber to send data back to notifier 48 | /// String identifying a message token 49 | /// Method to invoke when notified 50 | public void Register(string token, 51 | EventHandler> callback) 52 | { 53 | InternalRegister(token, callback, typeof(NotificationEventArgs)); 54 | } 55 | 56 | /// 57 | /// Remove callback from the invocation list. 58 | /// 59 | /// String identifying a message token 60 | /// Method to remove from notifications 61 | public void Unregister(string token, EventHandler callback) 62 | { 63 | InternalUnregister(token, callback, typeof(NotificationEventArgs)); 64 | } 65 | 66 | /// 67 | /// Remove callback from the invocation list. 68 | /// 69 | /// String identifying a message token 70 | /// Method to remove from notifications 71 | public void Unregister(string token, 72 | EventHandler> callback) 73 | { 74 | InternalUnregister(token, callback, typeof(NotificationEventArgs)); 75 | } 76 | 77 | /// 78 | /// Remove callback from the invocation list. 79 | /// 80 | /// String identifying a message token 81 | /// Method to remove from notifications 82 | public void Unregister(string token, 83 | EventHandler> callback) 84 | { 85 | InternalUnregister(token, callback, typeof(NotificationEventArgs)); 86 | } 87 | 88 | private void InternalUnregister(string token, Delegate callback, Type eventArgsType) 89 | { 90 | lock (_sharedLock) 91 | { 92 | if (_subscriptions.ContainsKey(token)) 93 | { 94 | // Get handler with the same type 95 | Handler handler = _subscriptions[token] 96 | .SingleOrDefault(h => h.EventArgsType == eventArgsType); 97 | 98 | // If registered, remove callback from the list 99 | if (handler != null) _subscriptions[token].Remove(handler); 100 | 101 | // Remove dictionary entry if no subscibers left 102 | if (_subscriptions[token].Count == 0) _subscriptions.Remove(token); 103 | } 104 | } 105 | } 106 | 107 | private void InternalRegister(string token, Delegate callback, Type eventArgsType) 108 | { 109 | // If already registered, add callback to the list 110 | lock (_sharedLock) 111 | { 112 | if (_subscriptions.ContainsKey(token)) 113 | { 114 | _subscriptions[token].Add(new Handler(callback, eventArgsType)); 115 | } 116 | // Otherwise create an entry with a new callback list 117 | else 118 | { 119 | _subscriptions.Add(token, new List { new Handler(callback, eventArgsType) }); 120 | } 121 | } 122 | } 123 | 124 | /// 125 | /// Notify registered callbacks. 126 | /// 127 | /// String identifying a message token 128 | /// Sender of notification 129 | /// Event args carrying message 130 | void INotifyable.Notify(string token, object sender, NotificationEventArgs e) 131 | { 132 | // Notify subscriber 133 | InternalNotify(token, sender, e); 134 | } 135 | 136 | private void InternalNotify(string token, object sender, 137 | NotificationEventArgs e) 138 | { 139 | List handlers; 140 | lock (_sharedLock) 141 | { 142 | // Return if no handlers registered 143 | if (!_subscriptions.TryGetValue(token, out handlers)) return; 144 | 145 | // Get callbacks with the same event args type 146 | handlers = handlers 147 | .Where(h => h.EventArgsType == e.GetType()) 148 | .ToList(); 149 | } 150 | 151 | // Invoke each callback associated with token 152 | foreach (var handler in handlers) 153 | { 154 | handler?.Callback.DynamicInvoke(sender, e); 155 | } 156 | } 157 | 158 | internal class Handler 159 | { 160 | public Delegate Callback { get; set; } 161 | public Type EventArgsType { get; set; } 162 | 163 | public Handler(Delegate callback, Type eventArgsType) 164 | { 165 | this.Callback = callback; 166 | this.EventArgsType = eventArgsType; 167 | } 168 | } 169 | } 170 | } 171 | -------------------------------------------------------------------------------- /Src/SimpleMvvmToolkit.Express/ModelBase.cs: -------------------------------------------------------------------------------- 1 | using System; 2 | using System.Collections; 3 | using System.Collections.Generic; 4 | using System.ComponentModel; 5 | using System.Linq.Expressions; 6 | 7 | namespace SimpleMvvmToolkit.Express 8 | { 9 | /// 10 | /// Provides support to entities for two-way data binding and data validation. 11 | /// 12 | /// Class inheriting from ModelBase 13 | public abstract class ModelBase : INotifyPropertyChanged, INotifyDataErrorInfo 14 | { 15 | readonly Dictionary> _errors = 16 | new Dictionary>(); 17 | 18 | /// 19 | /// Allows you to specify a lambda for notify property changed. 20 | /// 21 | /// Property type 22 | /// Property for notification 23 | protected virtual void NotifyPropertyChanged 24 | (Expression> property) 25 | { 26 | // Convert expression to a property name 27 | string propertyName = ((MemberExpression)property.Body).Member.Name; 28 | 29 | // Fire PropertyChanged event 30 | NotifyPropertyChanged(propertyName); 31 | } 32 | 33 | /// 34 | /// Allows you to specify a lambda for notify errors changed. 35 | /// 36 | /// Property type 37 | /// Property for notification 38 | protected virtual void NotifyErrorsChanged 39 | (Expression> property) 40 | { 41 | // Convert expression to a property name 42 | string propertyName = ((MemberExpression)property.Body).Member.Name; 43 | 44 | // Fire PropertyChanged event 45 | NotifyErrorsChanged(propertyName); 46 | } 47 | 48 | /// 49 | /// PropertyChanged event accessible to derived classes 50 | /// 51 | public event PropertyChangedEventHandler PropertyChanged 52 | { 53 | add { PropertyChangedField += value; } 54 | remove { PropertyChangedField -= value; } 55 | } 56 | 57 | /// 58 | /// PropertyChanged field accessible to derived classes. 59 | /// 60 | protected event PropertyChangedEventHandler PropertyChangedField; 61 | 62 | /// 63 | /// Fire PropertyChanged event. 64 | /// 65 | /// Property name 66 | protected void NotifyPropertyChanged(string propertyName) 67 | { 68 | PropertyChangedField?.Invoke(this, new PropertyChangedEventArgs(propertyName)); 69 | } 70 | 71 | /// 72 | /// ErrorsChanged event accessible to derived classes 73 | /// 74 | public event EventHandler ErrorsChanged 75 | { 76 | add { ErrorsChangedField += value; } 77 | remove { ErrorsChangedField -= value; } 78 | } 79 | 80 | /// 81 | /// ErrorsChanged field accessible to derived classes 82 | /// 83 | protected event EventHandler ErrorsChangedField; 84 | 85 | /// 86 | /// Enumeration for sequence of errors. 87 | /// 88 | /// Property name 89 | /// Sequence of errors. 90 | public IEnumerable GetErrors(string propertyName) 91 | { 92 | if (_errors.ContainsKey(propertyName)) 93 | return _errors[propertyName]; 94 | return null; 95 | } 96 | 97 | /// 98 | /// Returns true if errors list is not empty. 99 | /// 100 | public bool HasErrors => _errors.Count > 0; 101 | 102 | /// 103 | /// Add error to the list. 104 | /// 105 | /// Property name 106 | /// Validation error 107 | protected void AddError(string propertyName, string error) 108 | { 109 | _errors[propertyName] = new List { error }; 110 | NotifyErrorsChanged(propertyName); 111 | } 112 | 113 | /// 114 | /// Remove error from the list. 115 | /// 116 | /// Property name 117 | protected void RemoveError(string propertyName) 118 | { 119 | if (_errors.ContainsKey(propertyName)) 120 | _errors.Remove(propertyName); 121 | NotifyErrorsChanged(propertyName); 122 | } 123 | 124 | /// 125 | /// Fire ErrorsChanged event. 126 | /// 127 | /// Property name 128 | protected void NotifyErrorsChanged(string propertyName) 129 | { 130 | ErrorsChangedField?.Invoke(this, new DataErrorsChangedEventArgs(propertyName)); 131 | } 132 | } 133 | } 134 | -------------------------------------------------------------------------------- /Src/SimpleMvvmToolkit.Express/ModelExtensions.cs: -------------------------------------------------------------------------------- 1 | using System; 2 | using System.Collections.Generic; 3 | using System.IO; 4 | using System.Linq; 5 | using System.Reflection; 6 | using System.Runtime.Serialization; 7 | using Newtonsoft.Json; 8 | 9 | namespace SimpleMvvmToolkit.Express 10 | { 11 | /// 12 | /// Extension methods for model entities. 13 | /// 14 | public static class ModelExtensions 15 | { 16 | /// 17 | /// Performs a deep copy using Json Serializer. 18 | /// 19 | /// Entity type 20 | /// Entity object 21 | /// Cloned entity 22 | public static T Clone(this T obj) 23 | { 24 | var settings = new JsonSerializerSettings 25 | { 26 | PreserveReferencesHandling = PreserveReferencesHandling.All 27 | }; 28 | var json = JsonConvert.SerializeObject(obj, settings); 29 | var result = JsonConvert.DeserializeObject(json, settings); 30 | return result; 31 | } 32 | 33 | /// 34 | /// Performs a deep copy using DatacontractSerializer. 35 | /// 36 | /// Entity type 37 | /// Entity object 38 | /// Cloned entity 39 | public static T CloneXml(this T obj) 40 | { 41 | T copy; 42 | using (var stream = new MemoryStream()) 43 | { 44 | var settings = new DataContractSerializerSettings {PreserveObjectReferences = true}; 45 | var ser = new DataContractSerializer(typeof(T), settings); 46 | ser.WriteObject(stream, obj); 47 | stream.Position = 0; 48 | copy = (T)ser.ReadObject(stream); 49 | } 50 | return copy; 51 | } 52 | 53 | /// 54 | /// Performs a shallow copy of all properties 55 | /// 56 | /// Entity type 57 | /// Source entity object 58 | /// Destination entity object 59 | public static void CopyValuesTo(this T source, T dest) 60 | { 61 | var properties = typeof(T).GetRuntimeProperties() 62 | .Where(p => p.CanRead && p.CanWrite); 63 | 64 | foreach (var property in properties) 65 | { 66 | if (property.SetMethod == null) continue; 67 | property.SetValue(dest, property.GetValue(source, null), null); 68 | } 69 | } 70 | 71 | /// 72 | /// Determines equality based on property hash codes. 73 | /// 74 | /// Entity type 75 | /// Source entity object 76 | /// Object to compare 77 | /// Properties excluded from comparison 78 | /// True if object properties are the same 79 | public static bool AreSame(this T source, T item, params string[] excludeProps) 80 | where T : class 81 | { 82 | int hashCode1 = GetObjectHashCode(source, excludeProps); 83 | int hashCode2 = GetObjectHashCode(item, excludeProps); 84 | return hashCode1 == hashCode2; 85 | } 86 | 87 | // Calculates object has code based on property hash codes 88 | private static int GetObjectHashCode(object item, params string[] excludeProps) 89 | { 90 | int hashCode = 0; 91 | foreach (var prop in item.GetType().GetRuntimeProperties()) 92 | { 93 | if (!excludeProps.Contains(prop.Name)) 94 | { 95 | object propVal = prop.GetValue(item, null); 96 | if (propVal != null) 97 | { 98 | hashCode = hashCode ^ propVal.GetHashCode(); 99 | } 100 | } 101 | } 102 | return hashCode; 103 | } 104 | 105 | /// 106 | /// Convert an enum into a list of value / string pairs for 107 | /// showing in list controls 108 | /// 109 | /// Enum type 110 | /// Sequence of enum / name pairs 111 | public static IEnumerable> GetEnumItems() 112 | where TEnum : struct 113 | { 114 | // Get TEnum type and verify it's an enum 115 | var enumType = typeof(TEnum); 116 | if (!IsEnum(enumType)) 117 | throw new ArgumentException($"Type {enumType.Name} is not an enum"); 118 | 119 | // Project enum values and names 120 | var items = from f in enumType.GetRuntimeFields() 121 | where f.IsPublic && f.IsStatic && f.IsLiteral 122 | let val = (TEnum)f.GetValue(enumType) 123 | let name = f.Name 124 | select new EnumItem(val, name); 125 | return items; 126 | } 127 | 128 | /// 129 | /// Convert an enum into a list of value / string pairs for 130 | /// showing in list controls 131 | /// 132 | /// Enum type 133 | /// Enum base type 134 | /// Sequence of value / name pairs 135 | public static IEnumerable> GetEnumItems() 136 | where TEnum : struct 137 | where TValue : struct 138 | { 139 | // Get TEnum type and verify it's an enum 140 | var enumType = typeof(TEnum); 141 | if (!IsEnum(enumType)) 142 | throw new ArgumentException($"Type {enumType.Name} is not an enum"); 143 | 144 | // Verify TValue is an allowed numeric type 145 | var valType = typeof(TValue); 146 | if (!IsValidEnumBase(valType)) 147 | throw new ArgumentException($"Type {enumType.Name} is not a valid enum base type"); 148 | 149 | // Project enum values and names 150 | var items = from f in enumType.GetRuntimeFields() 151 | where f.IsPublic && f.IsStatic && f.IsLiteral 152 | let val = (TValue)f.GetValue(enumType) 153 | let name = f.Name 154 | select new EnumItem(val, name); 155 | return items; 156 | } 157 | 158 | private static bool IsEnum(Type enumType) 159 | { 160 | return typeof(Enum).GetTypeInfo().IsAssignableFrom(enumType.GetTypeInfo()); 161 | } 162 | 163 | private static bool IsValidEnumBase(Type valType) 164 | { 165 | return valType == typeof(byte) 166 | || valType == typeof(short) 167 | || valType == typeof(int) 168 | || valType == typeof(long); 169 | } 170 | } 171 | 172 | /// 173 | /// Name-value pair for enum-based lists. 174 | /// 175 | /// 176 | public class EnumItem 177 | { 178 | /// 179 | /// Constructor. 180 | /// 181 | public EnumItem() { } 182 | 183 | /// 184 | /// Constructor. 185 | /// 186 | /// Enum value. 187 | /// Enum name. 188 | public EnumItem(TValue value, string name) 189 | { 190 | Value = value; 191 | Name = name; 192 | } 193 | 194 | /// 195 | /// Enum value. 196 | /// 197 | public TValue Value { get; private set; } 198 | 199 | /// 200 | /// Enum name. 201 | /// 202 | public string Name { get; private set; } 203 | } 204 | } 205 | -------------------------------------------------------------------------------- /Src/SimpleMvvmToolkit.Express/NotificationEventArgs.cs: -------------------------------------------------------------------------------- 1 | using System; 2 | 3 | namespace SimpleMvvmToolkit.Express 4 | { 5 | /* 6 | * There are three levels of notifications: 7 | * NotificationEventArgs - with or without a string message 8 | * NotificationEventArgs - with outgoing data 9 | * NotificationEventArgs - with completion callback, 10 | * which can be and null if no data is returned 11 | */ 12 | 13 | /// 14 | /// Notification with or without a string message 15 | /// 16 | public class NotificationEventArgs : EventArgs 17 | { 18 | /// 19 | /// Constructor. 20 | /// 21 | public NotificationEventArgs() { } 22 | 23 | /// 24 | /// Constructor 25 | /// 26 | /// String-based message. 27 | public NotificationEventArgs(string message) 28 | { 29 | Message = message; 30 | } 31 | 32 | /// 33 | /// String-based message. 34 | /// 35 | public string Message { get; protected set; } 36 | } 37 | 38 | /// 39 | /// Notification with outgoing data 40 | /// 41 | /// Outgoing data type 42 | public class NotificationEventArgs : NotificationEventArgs 43 | { 44 | /// 45 | /// Constructor. 46 | /// 47 | public NotificationEventArgs() { } 48 | 49 | /// 50 | /// Constructor. 51 | /// 52 | /// String-based message. 53 | public NotificationEventArgs(string message) : base(message) { } 54 | 55 | /// 56 | /// Constructor. 57 | /// 58 | /// String-based message. 59 | /// Outgoing data. 60 | public NotificationEventArgs(string message, TOutgoing data) 61 | : this(message) 62 | { 63 | Data = data; 64 | } 65 | 66 | /// 67 | /// Outgoing data. 68 | /// 69 | public TOutgoing Data { get; protected set; } 70 | } 71 | 72 | /// 73 | /// Notification with outgoing and incoming data 74 | /// 75 | /// Outgoing data type 76 | /// Incoming data type 77 | public class NotificationEventArgs : NotificationEventArgs 78 | { 79 | /// 80 | /// Constructor. 81 | /// 82 | public NotificationEventArgs() { } 83 | 84 | /// 85 | /// Constructor. 86 | /// 87 | /// String-based message. 88 | public NotificationEventArgs(string message) : base(message) { } 89 | 90 | /// 91 | /// Constructor. 92 | /// 93 | /// String-based message. 94 | /// Outgoing data. 95 | public NotificationEventArgs(string message, TOutgoing data) 96 | : base(message, data) { } 97 | 98 | /// 99 | /// Constructor. 100 | /// 101 | /// String-based message. 102 | /// Outgoing data. 103 | /// Callback to return incoming data. 104 | public NotificationEventArgs(string message, TOutgoing data, Action completed) 105 | : this(message, data) 106 | { 107 | Completed = completed; 108 | } 109 | 110 | /// 111 | /// Callback to return incoming data. 112 | /// 113 | public Action Completed { get; protected set; } 114 | } 115 | } 116 | -------------------------------------------------------------------------------- /Src/SimpleMvvmToolkit.Express/Properties/AssemblyInfo.cs: -------------------------------------------------------------------------------- 1 | using System; 2 | using System.Reflection; 3 | using System.Runtime.InteropServices; 4 | 5 | // General Information about an assembly is controlled through the following 6 | // set of attributes. Change these attribute values to modify the information 7 | // associated with an assembly. 8 | [assembly: AssemblyTitle("SimpleMvvmToolkit.Express")] 9 | [assembly: AssemblyDescription("Simple Mvvm Toolkit Express")] 10 | [assembly: AssemblyCompany("Tony Sneed")] 11 | [assembly: AssemblyProduct("SimpleMvvmToolkit.Express")] 12 | 13 | // Setting ComVisible to false makes the types in this assembly not visible 14 | // to COM components. If you need to access a type in this assembly from 15 | // COM, set the ComVisible attribute to true on that type. 16 | [assembly: ComVisible(false)] 17 | [assembly: CLSCompliant(true)] 18 | 19 | [assembly: AssemblyVersion("1.0.0")] 20 | [assembly: AssemblyFileVersion("1.0.0")] -------------------------------------------------------------------------------- /Src/SimpleMvvmToolkit.Express/SimpleMvvmToolkit.Express.csproj: -------------------------------------------------------------------------------- 1 |  2 | 3 | 4 | Toolkit for building client applications using the Model-View-ViewModel design pattern 5 | Simple MVVM Toolkit Express 6 | en-US 7 | Tony Sneed 8 | netstandard2.0 9 | true 10 | SimpleMvvmToolkit.Express 11 | SimpleMvvmToolkit.Express 12 | mvvm;simplemvvmtoolkit;wpf;uwp;uap;win8;netstandard;xamarin 13 | https://raw.githubusercontent.com/SimpleMvvm/SimpleMvvmToolkit.Express/master/Images/simple-icon-sm.png 14 | http://github.com/SimpleMvvm/SimpleMvvmToolkit.Express 15 | MIT 16 | git 17 | git://github.com/SimpleMvvm/SimpleMvvmToolkit.Express 18 | false 19 | false 20 | false 21 | false 22 | false 23 | false 24 | 2.0.0 25 | true 26 | 27 | 28 | 29 | 30 | 31 | 32 | 33 | -------------------------------------------------------------------------------- /Src/SimpleMvvmToolkit.Express/ViewModelBase.cs: -------------------------------------------------------------------------------- 1 | using System; 2 | using System.ComponentModel; 3 | using System.Linq.Expressions; 4 | 5 | namespace SimpleMvvmToolkit.Express 6 | { 7 | /// 8 | /// Base class for non-detail view-models 9 | /// 10 | /// Class inheriting from ViewModelBase 11 | public abstract class ViewModelBase : INotifyPropertyChanged 12 | { 13 | /// 14 | /// MessageBus for communication among view models. 15 | /// 16 | protected readonly MessageBus CurrentMessageBus; 17 | 18 | /// 19 | /// Constructor invoked by derived classes. 20 | /// 21 | protected ViewModelBase() 22 | { 23 | CurrentMessageBus = MessageBus.Default; 24 | } 25 | 26 | /// 27 | /// PropertyChanged event accessible to dervied classes. 28 | /// 29 | public event PropertyChangedEventHandler PropertyChanged 30 | { 31 | add { PropertyChangedField += value; } 32 | remove { PropertyChangedField -= value; } 33 | } 34 | 35 | /// 36 | /// PropertyChanged field accessible to dervied classes. 37 | /// 38 | protected PropertyChangedEventHandler PropertyChangedField; 39 | 40 | /// 41 | /// Allows you to specify a lambda for notify property changed 42 | /// 43 | /// Property type 44 | /// Property for notification 45 | protected virtual void NotifyPropertyChanged 46 | (Expression> property) 47 | { 48 | // Convert expression to a property name 49 | string propertyName = ((MemberExpression)property.Body).Member.Name; 50 | 51 | // Fire PropertyChanged event 52 | NotifyPropertyChanged(propertyName); 53 | } 54 | 55 | /// 56 | /// Fire PropertyChanged event. 57 | /// 58 | /// Property name 59 | protected void NotifyPropertyChanged(string propertyName) 60 | { 61 | PropertyChangedField?.Invoke(this, new PropertyChangedEventArgs(propertyName)); 62 | } 63 | 64 | /// 65 | /// Fire a notification event, which is transparently marshalled 66 | /// to the UI thread. 67 | /// 68 | /// Notification event 69 | /// Notification message 70 | protected void Notify 71 | (EventHandler handler, 72 | NotificationEventArgs e) 73 | { 74 | handler?.Invoke(this, e); 75 | } 76 | 77 | /// 78 | /// Fire a notification event, which is transparently marshalled 79 | /// to the UI thread. 80 | /// 81 | /// Outgoing data type 82 | /// Notification event 83 | /// Notification message 84 | protected void Notify 85 | (EventHandler> handler, 86 | NotificationEventArgs e) 87 | { 88 | handler?.Invoke(this, e); 89 | } 90 | 91 | /// 92 | /// Fire a notification event, which is transparently marshalled 93 | /// to the UI thread. 94 | /// 95 | /// Outgoing data type 96 | /// Incoming data type 97 | /// Notification event 98 | /// Notification message 99 | protected void Notify 100 | (EventHandler> handler, 101 | NotificationEventArgs e) 102 | { 103 | handler?.Invoke(this, e); 104 | } 105 | 106 | // Proxy for communication with the MessageBus 107 | private readonly MessageBusProxy _messageBusHelper = new MessageBusProxy(); 108 | 109 | /// 110 | /// Register callback using a string token, which is usually defined as a constant. 111 | /// 112 | /// 113 | /// There is no need to unregister because receivers are allowed to be garbage collected. 114 | /// 115 | /// String identifying a message token 116 | /// Method to invoke when notified 117 | protected void RegisterToReceiveMessages(string token, EventHandler callback) 118 | { 119 | // Register callback with MessageBusHelper and MessageBus 120 | _messageBusHelper.Register(token, callback); 121 | CurrentMessageBus.Register(token, _messageBusHelper); 122 | } 123 | 124 | /// 125 | /// Register callback using string token and notification with TOutgoing data. 126 | /// 127 | /// 128 | /// There is no need to unregister because receivers are allowed to be garbage collected. 129 | /// 130 | /// Type used by notifier to send data 131 | /// String identifying a message token 132 | /// Method to invoke when notified 133 | protected void RegisterToReceiveMessages(string token, 134 | EventHandler> callback) 135 | { 136 | // Register callback with MessageBusHelper and MessageBus 137 | _messageBusHelper.Register(token, callback); 138 | CurrentMessageBus.Register(token, _messageBusHelper); 139 | } 140 | 141 | /// 142 | /// Register callback using string token and notification with TOutgoing data 143 | /// and the subscriber's callback with TIncoming data. 144 | /// 145 | /// 146 | /// There is no need to unregister because receivers are allowed to be garbage collected. 147 | /// 148 | /// Type used by notifier to send data 149 | /// Type sent by subscriber to send data back to notifier 150 | /// String identifying a message token 151 | /// Method to invoke when notified 152 | protected void RegisterToReceiveMessages(string token, 153 | EventHandler> callback) 154 | { 155 | // Register callback with MessageBusHelper and MessageBus 156 | _messageBusHelper.Register(token, callback); 157 | CurrentMessageBus.Register(token, _messageBusHelper); 158 | } 159 | 160 | /// 161 | /// Unregister callback using a string token, which is usually defined as a constant. 162 | /// 163 | /// 164 | /// This is optional because registered receivers are allowed to be garbage collected. 165 | /// 166 | /// String identifying a message token 167 | /// Method to invoke when notified 168 | protected void UnregisterToReceiveMessages(string token, EventHandler callback) 169 | { 170 | // Unregister callback with MessageBusHelper and MessageBus 171 | _messageBusHelper.Unregister(token, callback); 172 | CurrentMessageBus.Unregister(token, _messageBusHelper); 173 | } 174 | 175 | /// 176 | /// Unregister callback using string token and notification with TOutgoing data. 177 | /// 178 | /// 179 | /// This is optional because registered receivers are allowed to be garbage collected. 180 | /// 181 | /// Type used by notifier to send data 182 | /// String identifying a message token 183 | /// Method to invoke when notified 184 | protected void UnregisterToReceiveMessages(string token, 185 | EventHandler> callback) 186 | { 187 | // Unregister callback with MessageBusHelper and MessageBus 188 | _messageBusHelper.Unregister(token, callback); 189 | CurrentMessageBus.Unregister(token, _messageBusHelper); 190 | } 191 | 192 | /// 193 | /// Unregister callback using string token and notification with TOutgoing data 194 | /// and the subscriber's callback with TIncoming data. 195 | /// 196 | /// 197 | /// This is optional because registered receivers are allowed to be garbage collected. 198 | /// 199 | /// Type used by notifier to send data 200 | /// Type sent by subscriber to send data back to notifier 201 | /// String identifying a message token 202 | /// Method to invoke when notified 203 | protected void UnregisterToReceiveMessages(string token, 204 | EventHandler> callback) 205 | { 206 | // Unregister callback with MessageBusHelper and MessageBus 207 | _messageBusHelper.Unregister(token, callback); 208 | CurrentMessageBus.Unregister(token, _messageBusHelper); 209 | } 210 | 211 | /// 212 | /// Notify registered subscribers. 213 | /// Call is transparently marshalled to UI thread. 214 | /// 215 | /// String identifying a message token 216 | /// Event args carrying message 217 | protected void SendMessage(string token, NotificationEventArgs e) 218 | { 219 | // Send notification through the MessageBus 220 | CurrentMessageBus.Notify(token, this, e); 221 | } 222 | 223 | /// 224 | /// Notify registered subscribers. 225 | /// Call is transparently marshalled to UI thread. 226 | /// 227 | /// Type used by notifier to send data 228 | /// String identifying a message token 229 | /// Event args carrying message 230 | protected void SendMessage(string token, 231 | NotificationEventArgs e) 232 | { 233 | // Send notification through the MessageBus 234 | CurrentMessageBus.Notify(token, this, e); 235 | } 236 | 237 | /// 238 | /// Notify registered subscribers. 239 | /// Call is transparently marshalled to UI thread. 240 | /// 241 | /// Type used by notifier to send data 242 | /// Type sent by subscriber to send data back to notifier 243 | /// String identifying a message token 244 | /// Event args carrying message 245 | protected void SendMessage(string token, 246 | NotificationEventArgs e) 247 | { 248 | // Send notification through the MessageBus 249 | CurrentMessageBus.Notify(token, this, e); 250 | } 251 | 252 | /// 253 | /// Notify registered subscribers asynchronously. 254 | /// Call is not marshalled to UI thread. 255 | /// 256 | /// String identifying a message token 257 | /// Event args carrying message 258 | protected void BeginSendMessage(string token, NotificationEventArgs e) 259 | { 260 | // Send notification through the MessageBus 261 | CurrentMessageBus.BeginNotify(token, this, e); 262 | } 263 | 264 | /// 265 | /// Notify registered subscribers asynchronously. 266 | /// Call is not marshalled to UI thread. 267 | /// 268 | /// Type used by notifier to send data 269 | /// String identifying a message token 270 | /// Event args carrying message 271 | protected void BeginSendMessage(string token, 272 | NotificationEventArgs e) 273 | { 274 | // Send notification through the MessageBus 275 | CurrentMessageBus.BeginNotify(token, this, e); 276 | } 277 | 278 | /// 279 | /// Notify registered subscribers asynchronously. 280 | /// Call is not marshalled to UI thread. 281 | /// 282 | /// Type used by notifier to send data 283 | /// Type sent by subscriber to send data back to notifier 284 | /// String identifying a message token 285 | /// Event args carrying message 286 | protected void BeginSendMessage(string token, 287 | NotificationEventArgs e) 288 | { 289 | // Send notification through the MessageBus 290 | CurrentMessageBus.BeginNotify(token, this, e); 291 | } 292 | } 293 | } 294 | -------------------------------------------------------------------------------- /Src/SimpleMvvmToolkit.Express/ViewModelDetailBase.cs: -------------------------------------------------------------------------------- 1 | using System; 2 | using System.Collections.Generic; 3 | using System.ComponentModel; 4 | using System.Linq; 5 | using System.Linq.Expressions; 6 | 7 | // Alias for property dictionary 8 | using PropertyDictionary = System.Collections.Generic.Dictionary; 9 | 10 | namespace SimpleMvvmToolkit.Express 11 | { 12 | /// 13 | /// Base class for detail view-models. Also provides support for IEditableDataObject. 14 | /// 15 | /// Class inheriting from ViewModelBase 16 | /// Detail entity type 17 | public abstract class ViewModelDetailBase 18 | : ViewModelBase, IEditableObject 19 | where TModel : class, INotifyPropertyChanged 20 | { 21 | /// 22 | /// Data entity accessible to derived classes. 23 | /// 24 | protected TModel ModelField; 25 | 26 | /// 27 | /// Detail entity 28 | /// 29 | public virtual TModel Model 30 | { 31 | get { return ModelField; } 32 | set 33 | { 34 | ModelField = value; 35 | NotifyPropertyChanged("Model"); 36 | } 37 | } 38 | 39 | /// 40 | /// Model meta-properties which should be ignored when handling property changed events, 41 | /// and when dirty-checking or performing validation. 42 | /// 43 | protected virtual IList ModelMetaProperties 44 | { 45 | get { return _modelMetaProperties; } 46 | set { _modelMetaProperties = value; } 47 | } 48 | 49 | private IList _modelMetaProperties = new List 50 | { 51 | "HasErrors", "EntityConflict", "ValidationErrors", "HasValidationErrors", 52 | "EntityState", "HasChanges", "IsReadOnly", "EntityActions" 53 | }; 54 | 55 | private TModel Original { get; set; } 56 | 57 | private TModel Copy 58 | { 59 | get { return _copy; } 60 | set 61 | { 62 | // Fire IsDirty property changed when a model property changes 63 | PropertyChangedEventHandler handler = (s, ea) => 64 | { 65 | if (!_modelMetaProperties.Contains(ea.PropertyName)) 66 | { 67 | NotifyPropertyChanged("IsDirty"); 68 | } 69 | }; 70 | 71 | // BeginEdit called 72 | if (value != null) 73 | { 74 | value.PropertyChanged += handler; 75 | } 76 | // EditEdit or CancelEdit called 77 | else if (_copy != null) 78 | { 79 | _copy.PropertyChanged -= handler; 80 | } 81 | _copy = value; 82 | } 83 | } 84 | private TModel _copy; 85 | 86 | /// 87 | /// Caches a deep clone of the entity 88 | /// 89 | public void BeginEdit() 90 | { 91 | // Throw an exception if Entity not supplied 92 | if (Model == null) 93 | { 94 | throw new InvalidOperationException("Entity must be set"); 95 | } 96 | 97 | // Return if we're already editing 98 | if (Copy != null) return; 99 | 100 | // Copy entity 101 | Original = Model; 102 | Copy = Model.Clone(); 103 | 104 | // Point entity to the copy 105 | Model = Copy; 106 | 107 | // Notify IsEditing, IsDirty 108 | NotifyPropertyChanged("IsEditing"); 109 | NotifyPropertyChanged("IsDirty"); 110 | 111 | // Post-processing 112 | OnBeginEdit(); 113 | } 114 | 115 | /// 116 | /// Copies property values from clone to original. 117 | /// 118 | public void EndEdit() 119 | { 120 | // Return if BeginEdit not called first 121 | if (Copy == null) return; 122 | 123 | // Tranfer values from copy to original 124 | Copy.CopyValuesTo(Original); 125 | 126 | // Point entity to original 127 | Model = Original; 128 | 129 | // Clear copy 130 | Copy = null; 131 | 132 | // Notify IsEditing, IsDirty 133 | NotifyPropertyChanged("IsEditing"); 134 | NotifyPropertyChanged("IsDirty"); 135 | 136 | // Post-processing 137 | OnEndEdit(); 138 | } 139 | 140 | /// 141 | /// Restores original 142 | /// 143 | public void CancelEdit() 144 | { 145 | // Return if BeginEdit not called first 146 | if (Copy == null) return; 147 | 148 | // Point entity to original 149 | Model = Original; 150 | 151 | // Clear copy 152 | Copy = null; 153 | 154 | // Notify IsEditing, IsDirty 155 | NotifyPropertyChanged("IsEditing"); 156 | NotifyPropertyChanged("IsDirty"); 157 | 158 | // Post-processing 159 | OnCancelEdit(); 160 | } 161 | 162 | /// 163 | /// Model has executed BeginEdit. 164 | /// 165 | protected virtual void OnBeginEdit() { } 166 | 167 | /// 168 | /// Model has executed EndEdit. 169 | /// 170 | protected virtual void OnEndEdit() { } 171 | 172 | /// 173 | /// Model has executed CancelEdit 174 | /// 175 | protected virtual void OnCancelEdit() { } 176 | 177 | /// 178 | /// BeginEdit has been called; EndEdit or CancelEdit has not been called. 179 | /// 180 | public bool IsEditing => Copy != null; 181 | 182 | /// 183 | /// Entity has been changed while editing. 184 | /// 185 | public bool IsDirty 186 | { 187 | get 188 | { 189 | // BeginEdit has been called 190 | if (Copy != null && Original != null) 191 | { 192 | bool areSame = Copy.AreSame(Original, _modelMetaProperties.ToArray()); 193 | return !areSame; 194 | } 195 | return false; 196 | } 197 | } 198 | 199 | // Handler for associate properties 200 | private readonly Dictionary _assocPropsHandlers 201 | = new Dictionary(); 202 | 203 | /// 204 | /// Propagates changes from model property to view-model property. 205 | /// 206 | /// Model property type 207 | /// View-model property type 208 | /// Model property 209 | /// View-model property 210 | protected virtual void AssociateProperties 211 | (Expression> modelProperty, 212 | Expression> viewModelProperty) 213 | { 214 | // Convert expressions to a property names 215 | string modelPropertyName = ((MemberExpression)modelProperty.Body).Member.Name; 216 | string viewModelPropertyName = ((MemberExpression)viewModelProperty.Body).Member.Name; 217 | 218 | // Get handlers 219 | if (!_assocPropsHandlers.ContainsKey(modelPropertyName)) 220 | _assocPropsHandlers.Add(modelPropertyName, new PropertyDictionary()); 221 | var handlers = _assocPropsHandlers[modelPropertyName]; 222 | 223 | // Propagate model to view-model property change 224 | PropertyChangedEventHandler handler = (s, ea) => 225 | { 226 | if (ea.PropertyName == modelPropertyName) 227 | { 228 | NotifyPropertyChanged(viewModelPropertyName); 229 | } 230 | }; 231 | 232 | // Add handler to property changed event 233 | Model.PropertyChanged += handler; 234 | 235 | // Add handler to handlers list 236 | handlers.Add(viewModelPropertyName, handler); 237 | } 238 | 239 | /// 240 | /// Unsubscribe from changes to model property. 241 | /// 242 | /// Model property type 243 | /// View-model property type 244 | /// Model property 245 | /// View-model property 246 | protected virtual void UnAssociateProperties 247 | (Expression> modelProperty, 248 | Expression> viewModelProperty) 249 | { 250 | // Convert expressions to a property names 251 | string modelPropertyName = ((MemberExpression)modelProperty.Body).Member.Name; 252 | string viewModelPropertyName = ((MemberExpression)viewModelProperty.Body).Member.Name; 253 | 254 | // Get handlers 255 | PropertyDictionary handlers; 256 | if (_assocPropsHandlers.TryGetValue(modelPropertyName, out handlers)) 257 | { 258 | // Get handler 259 | PropertyChangedEventHandler handler; 260 | if (handlers.TryGetValue(viewModelPropertyName, out handler)) 261 | { 262 | // Remove handler from property changed event 263 | Model.PropertyChanged -= handler; 264 | 265 | // Remove handlers from handlers list 266 | handlers.Remove(viewModelPropertyName); 267 | 268 | // Remove key if no handlers 269 | if (handlers.Count == 0) _assocPropsHandlers.Remove(modelPropertyName); 270 | } 271 | 272 | } 273 | } 274 | 275 | } 276 | } 277 | --------------------------------------------------------------------------------