Pilz.UI aktualisieren

Pilz.UI.md

@@ -102,3 +102,75 @@ Ensure you unregister your handlers from the event on Dispose or deconstructor!
     DialogBase.DialogClosed -= DialogBase_DialogClosed;
 }
 ```
+
+# Symbols
+
+## Setup SymbolFactory
+
+Create a new directory, we call it `Symbols` here.
+
+![image](uploads/c2de97541c4d37acf2da07d7a8ae395e/image.png){width=188 height=275}
+
+Ensure you add this to the project file. This will mark all PNG files within the Symbols folder as embedded resource.
+
+```xml
+<ItemGroup>
+  <EmbeddedResource Include="Symbols\*.png" />
+</ItemGroup>
+```
+
+Create a new enum. It may look like the following. Ensure you only add new values to the buttom as you will introduce a breaking change to your API otherwise.
+
+```csharp
+public enum GlobalSymbols
+{
+    add,
+    administrative_tools,
+    billboard,
+    cancel,
+    delete,
+    edit,
+    home,
+    login,
+    logout,
+    product,
+    project,
+    remove,
+    save,
+    settings,
+}
+```
+
+The class `GlobalsymbolFactory` need to inherit from `SymbolFactory<>`. Provide your symbols enum here. You will need to overwrite `GetImageResourceAssembly` and `GetImageRessourcePath` as this parts can't be done by the base class.
+
+```csharp
+public class GlobalSymbolFactory : SymbolFactory<GlobalSymbols>
+{
+    private static readonly string? symbolsNamespace = typeof(GlobalSymbolFactory).Namespace + ".Symbols";
+    private static readonly string symbolsPathTemplate = "{0}.{1}.png";
+
+    public override Assembly GetImageResourceAssembly()
+    {
+        return Assembly.GetExecutingAssembly();
+    }
+
+    public override string GetImageRessourcePath(GlobalSymbols svgImage)
+    {
+        return string.Format(symbolsPathTemplate, symbolsNamespace, svgImage);
+    }
+}
+```
+
+## Access symbols
+
+Accessing symbols esaily via an instance of your SymbolFactory implementation. You can either provide a static instance in `GlobalSymbolFactory` or create a new instance wherever you need it. Access via `GetImage`, decide wheneer you can use an `Image`.
+
+```csharp
+// Static instance in GlobalSymbolFactory
+public static ISymbolFactory<GlobalSymbols> Instance { get; } = new GlobalSymbolFactory();
+var img = GlobalSymbolFactory.Instance.GetImage(GlobalSymbols.billboard, SymbolSize.Default);
+
+// Instance on-demand
+var symbols = new GlobalSymbolFactory();
+var img = symbols.GetImage(GlobalSymbols.billboard, SymbolSize.Default);
+```