基于WPF制作一个可编程画板
作者:竹天笑
先上一张效果动图
同样老规矩,先上源码地址:https://gitee.com/akwkevin/aistudio.-wpf.-diagram
简单使用,自定义一个text模块的代码如下
Code = @"using System; namespace AIStudio.Wpf.CSharpScript { public class Writer { public string StringValue{ get; set;} = ""Welcome to AIStudio.Wpf.Diagram""; public string Execute() { return StringValue; } } }";
是不是很简单。
本次扩展的主要内容
1.可编程模块,使用C#语言。
2.控制台打印控件,可以打印程序中的Console.WriteLine数据
3.为了便于大家使用,写了一个Box工厂分配Box的数据流向效果图。
可编程模块的实现原理
使用Microsoft.CodeAnalysis.CSharp.Scripting对代码进行编译,生成Assembly,然后对Assembly反射获得对象,对象内部固定有一个Execute方法,每次扫描的时候执行即可。
1.编译使用的Using,必须添加引用集,为了省事,把整个程序的Reference都放入进行编译,获得引用的核心代码如下:
var references = AppDomain.CurrentDomain.GetAssemblies().Where(p => !p.IsDynamic && !string.IsNullOrEmpty(p.Location)).Select(x => MetadataReference.CreateFromFile(x.Location)).ToList(); //Costura.Fody压缩后,无Location,读取资源文件中的reference foreach (var assemblyEmbedded in AppDomain.CurrentDomain.GetAssemblies().Where(p => !p.IsDynamic && string.IsNullOrEmpty(p.Location))) { using (var stream = Assembly.GetEntryAssembly().GetManifestResourceStream($"costura.{assemblyEmbedded.GetName().Name.ToLowerInvariant()}.dll.compressed")) { if (stream != null) { using (var compressStream = new DeflateStream(stream, CompressionMode.Decompress)) { var memStream = new MemoryStream(); CopyTo(compressStream, memStream); memStream.Position = 0; references.Add(MetadataReference.CreateFromStream(memStream)); } } } }
2.动态编译的代码的核心代码如下:
public static Assembly GenerateAssemblyFromCode(string code, out string message) { Assembly assembly = null; message = ""; // 丛代码中转换表达式树 SyntaxTree syntaxTree = CSharpSyntaxTree.ParseText(code); // 随机程序集名称 string assemblyName = Path.GetRandomFileName(); // 引用 // 创建编译对象 CSharpCompilation compilation = CSharpCompilation.Create(assemblyName, new[] { syntaxTree }, References, new CSharpCompilationOptions(OutputKind.DynamicallyLinkedLibrary)); using (var ms = new MemoryStream()) { // 将编译好的IL代码放入内存流 EmitResult result = compilation.Emit(ms); // 编译失败,提示 if (!result.Success) { IEnumerable<Diagnostic> failures = result.Diagnostics.Where(diagnostic => diagnostic.IsWarningAsError || diagnostic.Severity == DiagnosticSeverity.Error).ToList(); foreach (Diagnostic diagnostic in failures) { message += $"{diagnostic.Id}: {diagnostic.GetMessage()}"; Console.WriteLine(message); } } else { // 编译成功,从内存中加载编译好的程序集 ms.Seek(0, SeekOrigin.Begin); assembly = Assembly.Load(ms.ToArray()); } } return assembly; }
3.获得编译后的程序集,以及执行。
// 反射获取程序集中 的类 Type type = assembly.GetTypes().FirstOrDefault(p => p.FullName.StartsWith("AIStudio.Wpf")); //assembly.GetType("AIStudio.Wpf.CSharpScript.Write"); // 创建该类的实例 object obj = Activator.CreateInstance(type); // 通过反射方式调用类中的方法。 var result = type.InvokeMember("Execute", BindingFlags.Default | BindingFlags.InvokeMethod, null, obj, new object[] { });
代码编辑模块的实现
选择AvalonEdit控件,另外为了使用VS2019_Dark的黑色皮肤,引用官方Demo中的HL和TextEditlib实现自定义换肤。
官方Demo的换肤写的超级复杂,看不懂,但是我们只要理解换肤的核心部分就是动态资源字典,因此我简化下,改进后的核心换肤代码如下:
public class TextEditorThemeHelper { static Dictionary<string, ResourceDictionary> ThemeDictionary = new Dictionary<string, ResourceDictionary>(); public static List<string> Themes = new List<string>() { "Dark", "Light", "TrueBlue", "VS2019_Dark" }; public static string CurrentTheme { get; set; } static TextEditorThemeHelper() { var resource = new ResourceDictionary { Source = new Uri("/TextEditLib;component/Themes/LightBrushs.xaml", UriKind.RelativeOrAbsolute) }; ThemeDictionary.Add("Light", resource); resource = new ResourceDictionary { Source = new Uri("/TextEditLib;component/Themes/DarkBrushs.xaml", UriKind.RelativeOrAbsolute) }; ThemeDictionary.Add("Dark", resource); Application.Current.Resources.MergedDictionaries.Add(resource); } /// <summary> /// 设置主题 /// </summary> /// <param name="theme"></param> public static void SetCurrentTheme(string theme) { OnAppThemeChanged(theme);//切换到VS2019_Dark CurrentTheme = theme; } /// <summary> /// Invoke this method to apply a change of theme to the content of the document /// (eg: Adjust the highlighting colors when changing from "Dark" to "Light" /// WITH current text document loaded.) /// </summary> internal static void OnAppThemeChanged(string theme) { ThemedHighlightingManager.Instance.SetCurrentTheme(theme); if (ThemeDictionary.ContainsKey(theme)) { foreach (var key in ThemeDictionary[theme].Keys) { ApplyToDynamicResource(key, ThemeDictionary[theme][key]); } } // Does this highlighting definition have an associated highlighting theme? else if (ThemedHighlightingManager.Instance.CurrentTheme.HlTheme != null) { // A highlighting theme with GlobalStyles? // Apply these styles to the resource keys of the editor foreach (var item in ThemedHighlightingManager.Instance.CurrentTheme.HlTheme.GlobalStyles) { switch (item.TypeName) { case "DefaultStyle": ApplyToDynamicResource(TextEditLib.Themes.ResourceKeys.EditorBackground, item.backgroundcolor); ApplyToDynamicResource(TextEditLib.Themes.ResourceKeys.EditorForeground, item.foregroundcolor); break; case "CurrentLineBackground": ApplyToDynamicResource(TextEditLib.Themes.ResourceKeys.EditorCurrentLineBackgroundBrushKey, item.backgroundcolor); ApplyToDynamicResource(TextEditLib.Themes.ResourceKeys.EditorCurrentLineBorderBrushKey, item.bordercolor); break; case "LineNumbersForeground": ApplyToDynamicResource(TextEditLib.Themes.ResourceKeys.EditorLineNumbersForeground, item.foregroundcolor); break; case "Selection": ApplyToDynamicResource(TextEditLib.Themes.ResourceKeys.EditorSelectionBrush, item.backgroundcolor); ApplyToDynamicResource(TextEditLib.Themes.ResourceKeys.EditorSelectionBorder, item.bordercolor); break; case "Hyperlink": ApplyToDynamicResource(TextEditLib.Themes.ResourceKeys.EditorLinkTextBackgroundBrush, item.backgroundcolor); ApplyToDynamicResource(TextEditLib.Themes.ResourceKeys.EditorLinkTextForegroundBrush, item.foregroundcolor); break; case "NonPrintableCharacter": ApplyToDynamicResource(TextEditLib.Themes.ResourceKeys.EditorNonPrintableCharacterBrush, item.foregroundcolor); break; default: throw new System.ArgumentOutOfRangeException("GlobalStyle named '{0}' is not supported.", item.TypeName); } } } } /// <summary> /// Re-define an existing <seealso cref="SolidColorBrush"/> and backup the originial color /// as it was before the application of the custom coloring. /// </summary> /// <param name="key"></param> /// <param name="newColor"></param> private static void ApplyToDynamicResource(ComponentResourceKey key, Color? newColor) { if (Application.Current.Resources[key] == null || newColor == null) return; // Re-coloring works with SolidColorBrushs linked as DynamicResource if (Application.Current.Resources[key] is SolidColorBrush) { //backupDynResources.Add(resourceName); var newColorBrush = new SolidColorBrush((Color)newColor); newColorBrush.Freeze(); Application.Current.Resources[key] = newColorBrush; } } private static void ApplyToDynamicResource(object key, object newValue) { if (Application.Current.Resources[key] == null || newValue == null) return; Application.Current.Resources[key] = newValue; } }
使用方法:
TextEditorThemeHelper.SetCurrentTheme("VS2019_Dark");
或者 TextEditorThemeHelper.SetCurrentTheme("TrueBlue");
或者 TextEditorThemeHelper.SetCurrentTheme("Dark");
或者 TextEditorThemeHelper.SetCurrentTheme("Light");
是不是超级简单。
代码编辑模块的编译与测试
WPF打印控制台数据
///控制台打印方法支持切换运行输出方法Console.SetOut,核心代码如下: public class ConsoleWriter : TextWriter { private readonly Action<string> _Write; private readonly Action<string> _WriteLine; private readonly Action<string, string, string, int> _WriteCallerInfo; public ConsoleWriter() { } /// <summary> /// Console 输出重定向 /// </summary> /// <param name="write">日志方法委托(针对于 Write)</param> /// <param name="writeLine">日志方法委托(针对于 WriteLine)</param> public ConsoleWriter(Action<string> write, Action<string> writeLine, Action<string, string, string, int> writeCallerInfo) { _Write = write; _WriteLine = writeLine?? write; _WriteCallerInfo = writeCallerInfo; } /// <summary> /// Console 输出重定向 /// </summary> /// <param name="write">日志方法委托(针对于 Write)</param> /// <param name="writeLine">日志方法委托(针对于 WriteLine)</param> public ConsoleWriter(Action<string> write, Action<string> writeLine) { _Write = write; _WriteLine = writeLine; } /// <summary> /// Console 输出重定向 /// </summary> /// <param name="write">日志方法委托</param> public ConsoleWriter(Action<string> write) { _Write = write; _WriteLine = write; } /// <summary> /// Console 输出重定向(带调用方信息) /// </summary> /// <param name="write">日志方法委托(后三个参数为 CallerFilePath、CallerMemberName、CallerLineNumber)</param> public ConsoleWriter(Action<string, string, string, int> write) { _WriteCallerInfo = write; } /// <summary> /// 使用 UTF-16 避免不必要的编码转换 /// </summary> public override Encoding Encoding => Encoding.Unicode; /// <summary> /// 最低限度需要重写的方法 /// </summary> /// <param name="value">消息</param> public override void Write(string value) { if (_WriteCallerInfo != null) { WriteWithCallerInfo(value); return; } _Write(value); } /// <summary> /// 为提高效率直接处理一行的输出 /// </summary> /// <param name="value">消息</param> public override void WriteLine(string value) { if (_WriteCallerInfo != null) { WriteWithCallerInfo(value); return; } _WriteLine(value); } /// <summary> /// 带调用方信息进行写消息 /// </summary> /// <param name="value">消息</param> private void WriteWithCallerInfo(string value) { //3、System.Console.WriteLine -> 2、System.IO.TextWriter + SyncTextWriter.WriteLine -> 1、DotNet.Utilities.ConsoleHelper.ConsoleWriter.WriteLine -> 0、DotNet.Utilities.ConsoleHelper.ConsoleWriter.WriteWithCallerInfo var callInfo = ClassHelper.GetMethodInfo(4); _WriteCallerInfo(value, callInfo?.FileName, callInfo?.MethodName, callInfo?.LineNumber ?? 0); } public override void Close() { var standardOutput = new StreamWriter(Console.OpenStandardOutput()); standardOutput.AutoFlush = true; Console.SetOut(standardOutput); base.Close(); } }
使用:
ConsoleWriter ConsoleWriter = new ConsoleWriter(_write, _writeLine);
Console.SetOut(ConsoleWriter);
动态编译模块的输入输出自动生成
1.输入输出模块:public string Value{ get; set;}
2.输入模块:public string Value{private get; set;}
3.输出模块:public string Value{get;private set;}
4.与外部交互模块:private string Value{ get; set;} ,必须同名同属性。 核心代码如下:
public static Dictionary<string, List<PropertyInfo>> GetPropertyInfo(Type type) { Dictionary<string, List<PropertyInfo>> puts = new Dictionary<string, List<PropertyInfo>>() { {"Input", new List<PropertyInfo>() }, {"Output", new List<PropertyInfo>() }, {"Input_Output", new List<PropertyInfo>() }, {"Inner", new List<PropertyInfo>() } }; try { foreach (System.Reflection.PropertyInfo info in type.GetProperties(BindingFlags.Public | BindingFlags.Instance)) { if (info.CanRead && info.CanWrite) { if (info.SetMethod.IsPublic && info.GetMethod.IsPublic) { puts["Input_Output"].Add(info); } else if (info.SetMethod.IsPublic) { puts["Input"].Add(info); } else if (info.GetMethod.IsPublic) { puts["Output"].Add(info); } } else if (info.CanRead) { if (info.GetMethod.IsPublic) { puts["Output"].Add(info); } } } foreach (System.Reflection.PropertyInfo info in type.GetProperties(BindingFlags.NonPublic | BindingFlags.Instance)) { if (info.CanRead) { puts["Inner"].Add(info); } } } catch (Exception ex) { } return puts; }
最后介绍一下Demo的实现
1#.Int整数模块,界面定义一个TextBox绑定Int模块的输入管脚。 2#.Box产生模块,如果内部数组为空,那么按照输入管脚的数量初始化一个容量为输入整数数量的数组(随机颜色与形状),然后把数据放到输出管脚,当数据被取走后,下一个数据再次放到输出管脚。 3#.Bool模块,为false的时候按照颜色进行分配,为true的时候按照形状进行分配。4#.Box分配模块,当输入管脚为空的时候,2#模块的输出可以移动到4#的输入管脚,移动时间为1s,移动完成后,清除2#模块的输出。同时把数据按照颜色或者形状分配到输出,同时把输入管脚清除。 按照颜色分配时: (1.如果颜色为红色,那么输出到1号 (2.如果颜色为橙色,那么输出到2号 (3.如果颜色为黄色,那么输出到3号 (4.如果颜色为绿色,那么输出到4号 (5.如果颜色为青色,那么输出到5号 (6.如果颜色为蓝色,那么输出到6号 (7.如果颜色为紫色,那么输出到7号 按照形状分配时: (1.如果形状为圆形,那么输出到1号 (2.如果形状为三角形,那么输出到2号 (3.如果形状为方形,那么输出到3号 (4.如果形状为菱形,那么输出到4号 (5.如果形状为梯形,那么输出到5号 (6.如果形状为五角星,那么输出到6号 (7.如果形状为六边形,那么输出到7号 6#.有两个红色|圆形收集器(7#,8#),按两个容器中的数量比较反馈,均匀分配到这两个收集器中。 9#,10#,11#,12#,13#,14#按照管脚取走数据即可。
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