Add project files.

2022-11-01 15:26:08 +00:00
parent daa7b59f22
commit 7e4f880821
408 changed files with 16863 additions and 0 deletions
@@ -0,0 +1,74 @@
+using Avalonia;
+using Avalonia.Markup.Xaml;
+using System.Reflection;
+
+namespace TheXamlGuy.UI.Avalonia;
+
+public class TriggerExtension : MarkupExtension
+{
+    public AvaloniaObject? TargetObject { get; protected set; }
+
+    protected object? TargetInvoke { get; private set; }
+
+    public void Invoke(object sender, EventArgs args)
+    {
+        OnInvoked(sender, args);
+    }
+
+    public override object? ProvideValue(IServiceProvider serviceProvider)
+    {
+        if (serviceProvider.GetService(typeof(IProvideValueTarget)) is IProvideValueTarget target)
+        {
+            if (target.TargetObject is AvaloniaObject avaloniaObject)
+            {
+                TargetObject = avaloniaObject;
+            }
+            else if (serviceProvider.GetService(typeof(IRootObjectProvider)) is IRootObjectProvider root)
+            {
+                TargetObject = (AvaloniaObject)root.RootObject;      
+            }
+
+            if (TargetObject is not null)
+            {
+                string? targetName = target.TargetProperty as string;
+
+                TargetInvoke = target.TargetProperty;
+                OnAttached(serviceProvider);
+
+                EventInfo? eventInfo = target.TargetProperty as EventInfo ?? (targetName is not null ? TargetObject.GetType().GetEvent(targetName) : null);
+                MethodInfo? methodInfo = eventInfo is not null ? null : target.TargetProperty as MethodInfo ?? (targetName is not null ? TargetObject.GetType().GetMethod(targetName) : null);
+
+                MethodInfo invokeMethod = GetType().GetMethod("Invoke", BindingFlags.Instance | BindingFlags.Public)!;
+                if (invokeMethod is null)
+                {
+                    return this;
+                }
+
+                if (eventInfo is not null)
+                {
+                    return Delegate.CreateDelegate(eventInfo.EventHandlerType!, this, invokeMethod);
+                }
+
+                if (methodInfo is not null)
+                {
+                    if (methodInfo.GetParameters() is ParameterInfo[] methodParameters && methodParameters is { Length: 2 })
+                    {
+                        return Delegate.CreateDelegate(methodParameters[1].ParameterType, this, invokeMethod);
+                    }
+                }
+            }
+        }
+
+        return null;
+    }
+
+    protected virtual void OnAttached(IServiceProvider serviceProvider)
+    {
+
+    }
+
+    protected virtual void OnInvoked(object sender, EventArgs args)
+    {
+
+    }
+}