PowerControl: Provide ValueChanged event

Author: ayufan

PowerControl/Controller.cs

@@ -52,6 +52,7 @@ public Controller()
 
             var contextMenu = new System.Windows.Forms.ContextMenuStrip(components);
 
+            rootMenu.Init();
             rootMenu.Visible = false;
             rootMenu.Update();
             rootMenu.CreateMenu(contextMenu);

PowerControl/Menu/MenuItemWithOptions.cs

@@ -13,13 +13,17 @@ public class MenuItemWithOptions : MenuItem
         public Func<string, string?>? ApplyValue { get; set; }
         public Func<string?>? ResetValue { get; set; }
 
+        public event Action<MenuItemWithOptions, String?, String> ValueChanged;
+
         private System.Windows.Forms.Timer delayTimer = new System.Windows.Forms.Timer();
         private ToolStripMenuItem toolStripItem = new ToolStripMenuItem();
 
         public MenuItemWithOptions()
         {
             this.Selectable = true;
 
+            ValueChanged += delegate { };
+
             delayTimer.Tick += delegate (object? sender, EventArgs e)
             {
                 if (delayTimer != null)
@@ -89,12 +93,17 @@ public void Set(String value, bool immediately = false)
 
         private void FinalizeSet()
         {
+            var wasOption = ActiveOption;
+
             if (ApplyValue != null && SelectedOption != null)
                 ActiveOption = ApplyValue(SelectedOption);
             else
                 ActiveOption = SelectedOption;
 
             SelectedOption = null;
+
+            if (wasOption != ActiveOption && ActiveOption != null)
+                ValueChanged(this, wasOption, ActiveOption);
         }
 
         public override void CreateMenu(System.Windows.Forms.ContextMenuStrip contextMenu)

PowerControl/Menu/MenuRoot.cs

@@ -6,11 +6,14 @@ public class MenuRoot : MenuItem
     {
         public IList<MenuItem> Items { get; } = new List<MenuItem>();
         public MenuItem? Selected;
+
         public event Action VisibleChanged;
+        public event Action<MenuItemWithOptions, String?, String> ValueChanged;
 
         public MenuRoot()
         {
             VisibleChanged += delegate { };
+            ValueChanged += delegate { };
         }
 
         public MenuItem? this[String name]
@@ -26,12 +29,34 @@ public MenuItem? this[String name]
             }
         }
 
+        public IEnumerable<MenuItemWithOptions> AllMenuItemOptions()
+        {
+            foreach (var item in Items)
+            {
+                if (item is MenuItemWithOptions)
+                    yield return (MenuItemWithOptions)item;
+            }
+        }
+
         public override void CreateMenu(System.Windows.Forms.ContextMenuStrip contextMenu)
         {
             foreach (var item in Items)
                 item.CreateMenu(contextMenu);
         }
 
+        public void Init()
+        {
+            foreach (var item in AllMenuItemOptions())
+            {
+                item.ValueChanged += MenuItem_ValueChanged;
+            }
+        }
+
+        private void MenuItem_ValueChanged(MenuItemWithOptions item, String? was, String isNow)
+        {
+            ValueChanged(item, was, isNow);
+        }
+
         public override void Update()
         {
             foreach (var item in Items)