i'm bad at git, large commit with lots of changes

CursesWrapper.cs

@@ -187,81 +187,3 @@ public class MessageBox {
 		return index;
 	}
 }
-
-public class ColorPairs {
-    public static int Ch_Topmenu_Label = 101;
-    public static int Ch_Topmenu_Label_Active = 102;
-
-    public static void InitColors () {
-        NCurses.InitPair (101, CursesColor.WHITE, CursesColor.BLUE);
-        NCurses.InitPair (102, CursesColor.BLACK, CursesColor.BLUE);
-    }
-}
-
-public class TopMenu {
-    private nint parentScreen;
-    private nint childWindow;
-
-    public List<MenuItem> MenuItems { get; set; } = new List<MenuItem> ();
-
-    public TopMenu (nint screen) {
-        parentScreen = screen;
-
-        NCurses.GetMaxYX (screen, out _, out int width);
-        childWindow = NCurses.NewWindow (1, width, 0, 0);
-    }
-
-    public void Render (int? activeItem = null) {
-        int index = 0;
-        uint
-            normalColorPair = 0,
-            activeColorPair = 0;
-        var hasColor = NCurses.HasColors ();
-
-        if (hasColor) {
-            normalColorPair = NCurses.ColorPair (ColorPairs.Ch_Topmenu_Label);
-            activeColorPair = NCurses.ColorPair (ColorPairs.Ch_Topmenu_Label_Active);
-            NCurses.WindowBackground (childWindow, normalColorPair);
-            NCurses.WindowRefresh (childWindow);
-        }
-
-        NCurses.MoveWindowAddString (childWindow, 0, 0, " ");
-
-        foreach (var item in MenuItems) {
-            var itemIsActive = activeItem is not null && index == (int) activeItem;
-
-            if (itemIsActive && hasColor) {
-                NCurses.WindowAttributeOn (childWindow, activeColorPair);
-            }
-
-            if (itemIsActive) {
-                NCurses.WindowAddString (childWindow, $"[{item.Label}] ");
-            } else {
-                NCurses.WindowAddString (childWindow, $" {item.Label}  ");
-            }
-
-            if (itemIsActive && hasColor) {
-                NCurses.WindowAttributeOff (childWindow, activeColorPair);
-            }
-
-            index ++;
-        }
-
-        NCurses.WindowRefresh (childWindow);
-    }
-
-    public class MenuItem {
-        public required string Label { get; set; }
-        public string? HotKey { get; set; }
-        public MenuType Type { get; set; } = MenuType.Simple;
-        public List<MenuItem> SubMenuItems = new List<MenuItem> ();
-
-        public enum MenuType {
-            Simple,
-            TopMenu,
-            SubMenu,
-            Spacer
-        }
-    }
-}
-

CursesWrapper/CursesWrapper.cs

@@ -9,7 +9,11 @@ public class CursesWrapper {
 	public static nint InitNCurses () {
 		var screen = NCurses.InitScreen ();
 		NCurses.SetCursor (0);
+		NCurses.UseDefaultColors ();
 		NCurses.NoEcho ();
+		NCurses.Raw ();
+		NCurses.Keypad (screen, true);
+		NCurses.NoDelay (screen, false);
 
 		if (NCurses.HasColors ()) {
 			NCurses.StartColor ();
@@ -20,7 +24,7 @@ public class CursesWrapper {
 	}
 
 	/// <summary>
-    /// Get the total width of a window
+	/// Get the total width of a window/screen
 	/// </summary>
 	/// <param name="window">Window to query</param>
 	/// <returns>Width of window in columns</returns>
@@ -38,4 +42,15 @@ public class CursesWrapper {
 		NCurses.GetMaxYX (window, out int height, out int _);
 		return height;
 	}
+
+	/// <summary>
+	/// Compares a key code to a character to test for a held
+	/// Control key during the key press event
+	/// </summary>
+	/// <param name="keyCode"></param>
+	/// <param name="testChar"></param>
+	/// <returns></returns>
+	public static bool KeyPressIsCtrl (int keyCode, int testChar) {
+		return keyCode == (testChar & 0x1f);
+	}
 }

CursesWrapper/InnerWindow.cs

@@ -0,0 +1,12 @@
+namespace SCI.CursesWrapper;
+
+public class InnerWindow : Window {
+	public InnerWindow (nint rootScreen, InputHandler inputHandler) :
+		base (
+			0, 1,
+			CursesWrapper.GetWidth (rootScreen),
+			CursesWrapper.GetHeight (rootScreen) - 2,
+			inputHandler
+		)
+	{ }
+}

CursesWrapper/InputHandler.cs

@@ -1,3 +1,4 @@
+using System.Diagnostics;
 using Mindmagma.Curses;
 
 namespace SCI.CursesWrapper;
@@ -33,11 +34,6 @@ public class InputHandler {
 		}
 	}
 
-	/// <summary>
-	/// Root screen to fall back to when no window is active
-	/// </summary>
-	private nint rootScreen;
-
 	/// <summary>
 	/// Task running the endless input handler routine
 	/// </summary>
@@ -48,14 +44,6 @@ public class InputHandler {
 	/// </summary>
 	private CancellationTokenSource? listeningRoutineCts;
 
-	/// <summary>
-	/// Class constructor
-	/// <paramref name="screen">Parent screen this InputHandler is attached to</paramref>
-	/// </summary>
-	public InputHandler (nint screen) {
-		rootScreen = screen;
-	}
-
 	/// <summary>
 	/// Start listening to key presses and call registered callbacks
 	/// </summary>
@@ -96,59 +84,59 @@ public class InputHandler {
 		);
 	}
 
-	/// <summary>
-	/// Prepares the window for proper key press reading
-	/// </summary>
-	private void WindowSetup () {
-		if (ActiveWindow is not null) {
-			NCurses.Keypad (ActiveWindow.WindowId, true);
-			NCurses.NoDelay (ActiveWindow.WindowId, false);
-		} else {
-			NCurses.Keypad (rootScreen, true);
-			NCurses.NoDelay (rootScreen, false);
-		}
-	}
-
-	/// <summary>
-	/// Undoes any changes the setup routine configured for the active window
-	/// </summary>
-	private void WindowTeardown () {
-		if (ActiveWindow is not null) {
-			NCurses.Keypad (ActiveWindow.WindowId, false);
-			NCurses.NoDelay (ActiveWindow.WindowId, true);
-		} else {
-			NCurses.Keypad (rootScreen, false);
-			NCurses.NoDelay (rootScreen, true);
-		}
-	}
-
 	/// <summary>
 	/// Actual keypress handler being called as Task by StartListening ()
 	/// </summary>
 	private void _ListeningRoutine () {
 		if (listeningRoutineCts is null) return;
 
-		WindowSetup ();
-
-		int keyCode = -1;
-
 		while (!listeningRoutineCts.Token.IsCancellationRequested) {
-			if (OnKeyPress is null) {
-				Console.Title = "No handlers";
-			} else {
-				Console.Title = $"Got {OnKeyPress.GetInvocationList ().Length} handlers";
-			}
+			int keyCode  = -1;
+			int keyCode2 = -1;
 		
 			if (ActiveWindow is not null) {
 				keyCode = NCurses.WindowGetChar (ActiveWindow.WindowId);
+
+				// If this block looks yanky; it is.
+				// This code checks if ESC was pressed and waits for another
+				// key press for another 10 milliseconds. This is to catch
+				// key combinations with the Alt key, as it is sent as
+				// [Alt] + [<key>]
+				if (keyCode == CursesKey.ESC) {
+					NCurses.WindowTimeOut (ActiveWindow.WindowId, 10);
+					try {
+						keyCode2 = NCurses.WindowGetChar (ActiveWindow.WindowId);
+					} catch (Exception) {
+						keyCode2 = -1;
+					}
+					NCurses.WindowTimeOut (ActiveWindow.WindowId, -1);
+				}
 			} else {
 				keyCode = NCurses.GetChar ();
+				
+				// Janky solution, see above
+				if (keyCode == CursesKey.ESC) {
+					NCurses.TimeOut (10);
+					try {
+						keyCode2 = NCurses.GetChar ();
+					} catch (Exception) {
+						keyCode2 = -1;
+					}
+					NCurses.TimeOut (-1);
 				}
+			}
+
+			// Do nothing until either key code is larger than -1
+			if (keyCode < 0 && keyCode2 < 0) continue;
 
-			// Do nothing until the key code is larger than -1
-			if (keyCode < 0) continue;
+			// Test if [Alt]+[key] combination was pressed.
+			// This is due to [Alt]+[key] being sent as [ESC], [key]
+			bool isAltCombo = keyCode == CursesKey.ESC && keyCode2 != -1;
+			if (isAltCombo) {
+				keyCode = keyCode2;
+			}
 
-			var eventArgs = new NCursesKeyPressEventArgs (keyCode, ActiveWindow);
+			var eventArgs = new NCursesKeyPressEventArgs (keyCode, ActiveWindow, isAltCombo);
 			
 			// Handle any registered privileged key handlers
 			if (OnKeyPressPrivileged is not null) {
@@ -183,8 +171,12 @@ public class NCursesKeyPressEventArgs : EventArgs {
 
 	public bool CancelNextEvent { get; set; } = false;
 
-	public NCursesKeyPressEventArgs (int keyCode, Window? sourceWindow) {
+	private bool _isAltCombination = false;
+	public bool IsAltCombination { get { return _isAltCombination; } }
+
+	public NCursesKeyPressEventArgs (int keyCode, Window? sourceWindow, bool isAltCombination) {
 		_keyCode = keyCode;
 		_sourceWindow = sourceWindow;
+		_isAltCombination = isAltCombination;
 	}
 }

CursesWrapper/Window.cs

@@ -5,6 +5,8 @@ using Mindmagma.Curses;
 namespace SCI.CursesWrapper;
 
 public class Window {
+	public const int InnerPadding = 1;
+
 	/// <summary>
 	/// Gets or sets the window position on the screen
 	/// </summary>
@@ -15,10 +17,13 @@ public class Window {
 		}
 		set {
 			if (ParentWindow is not null) {
+				int addedPadding = ParentWindow.BorderEnabled?
+					InnerPadding + 1 : 0;
+
 				NCurses.WindowMove (
 					WindowId,
-                    ParentWindow.Position.Y + value.Y,
-                    ParentWindow.Position.X + value.X
+					ParentWindow.Position.Y + value.Y + addedPadding,
+					ParentWindow.Position.X + value.X + addedPadding
 				);
 			} else {
 				NCurses.WindowMove (
@@ -54,11 +59,23 @@ public class Window {
 		}
 		set {
 			NCurses.WindowBackground (WindowId, value);
-            Redraw ();
+			Draw ();
 			_backgroundColorId = value;
 		}
 	}
 
+	private bool _borderEnabled;
+	public bool BorderEnabled {
+		get {
+			return _borderEnabled;
+		}
+		set {
+			SetBorder (value);
+			Draw ();
+			_borderEnabled = value;
+		}
+	}
+
 	/// <summary>
 	/// Sets the parent window
 	/// </summary>
@@ -80,7 +97,8 @@ public class Window {
 	/// <summary>
 	/// Input handler assigned to this window
 	/// </summary>
-    private InputHandler? inputHandler;
+	protected InputHandler? _targetInputHandler;
+	public InputHandler? TargetInputHandler { get { return _targetInputHandler; }}
 
 	/// <summary>
 	/// Event handler called when this window is active and a key is pressed
@@ -96,20 +114,32 @@ public class Window {
 	/// <param name="height"></param>
 	/// <param name="parentWindow"></param>
 	public Window (int x, int y, int width, int height, Window? parentWindow = null) {
-        if (parentWindow is not null) {
-            _windowId = NCurses.DeriveWindow (
-                parentWindow.WindowId,
-                height, width,
-                y, x
-            );
-        } else {
-            _windowId = NCurses.NewWindow (
-                height, width,
-                y, x
-            );
+		_Initialize (new Point (x, y), new Size (width, height), parentWindow);
 	}
 
-        Redraw ();
+	/// <summary>
+	/// Create new window by specifying geometry through Point and Size objects
+	/// </summary>
+	/// <param name="position"></param>
+	/// <param name="windowSize"></param>
+	/// <param name="parentWindow"></param>
+	public Window (Point position, Size windowSize, Window? parentWindow = null) {
+		_Initialize (position, windowSize, parentWindow);
+	}
+
+	/// <summary>
+	/// Create new window by specifying X/Y and Width/Height geometry
+	/// </summary>
+	/// <param name="x"></param>
+	/// <param name="y"></param>
+	/// <param name="width"></param>
+	/// <param name="height"></param>
+	/// <param name="targetInputHandler"></param>
+	/// <param name="parentWindow"></param>
+	public Window (int x, int y, int width, int height, InputHandler targetInputHandler, Window? parentWindow = null) {
+		_Initialize (new Point (x, y), new Size (width, height), parentWindow);
+		RegisterInputHandler (targetInputHandler);
+		SetWindowActive ();
 	}
 
 	/// <summary>
@@ -117,14 +147,32 @@ public class Window {
 	/// </summary>
 	/// <param name="position"></param>
 	/// <param name="windowSize"></param>
+	/// <param name="targetInputHandler"></param>
 	/// <param name="parentWindow"></param>
-    public Window (Point position, Size windowSize, Window? parentWindow = null) {
+	public Window (Point position, Size windowSize, InputHandler targetInputHandler, Window? parentWindow = null) {
+		_Initialize (position, windowSize, parentWindow);
+		RegisterInputHandler (targetInputHandler);
+		SetWindowActive ();
+	}
+
+	/// <summary>
+	/// Actual initialization function for this class
+	/// </summary>
+	/// <param name="position"></param>
+	/// <param name="windowSize"></param>
+	/// <param name="parentWindow"></param>
+	private void _Initialize (Point position, Size windowSize, Window? parentWindow = null) {
 		if (parentWindow is not null) {
-            _windowId = NCurses.SubWindow (
+			int addedPadding = parentWindow.BorderEnabled?
+				InnerPadding + 1 : 0;
+
+			_windowId = NCurses.DeriveWindow (
 				parentWindow.WindowId,
 				windowSize.Height, windowSize.Width,
-                position.Y, position.X
+				position.Y + addedPadding, position.X + addedPadding
 			);
+
+			parentWindow.AddChildWindow (this);
 		} else {
 			_windowId = NCurses.NewWindow (
 				windowSize.Height, windowSize.Width,
@@ -132,7 +180,20 @@ public class Window {
 			);
 		}
 
-        Redraw ();
+		_position = position;
+		_windowSize = windowSize;
+		_parentWindow = parentWindow;
+
+		NCurses.Keypad (WindowId, true);
+
+		Draw ();
+	}
+
+	/// <summary>
+	/// Destroys the window and its sub-windows when the Window object is destroyed
+	/// </summary>
+	~Window () {
+		Destroy ();
 	}
 
 	/// <summary>
@@ -149,7 +210,6 @@ public class Window {
 	/// </summary>
 	/// <param name="child"></param>
 	public void RemoveChildWindow (Window child) {
-        if (!_childWindows.Contains (child)) return;
 		_childWindows.Remove (child);
 	}
 
@@ -162,15 +222,13 @@ public class Window {
 	}
 
 	/// <summary>
-    /// Redraws this window
+	/// Draws this window and all sub windows
 	/// </summary>
-    public void Redraw () {
+	public void Draw () {
 		NCurses.Refresh (); // TODO: Necessary?
 
-        if (ChildWindows.Count > 0) {
 		foreach (var window in ChildWindows) {
-                window.Redraw ();
-            }
+			window.Draw ();
 		}
 
 		if (ParentWindow is not null) ParentWindow.TouchWin ();
@@ -181,47 +239,54 @@ public class Window {
 	/// Destroys this window and all children windows
 	/// </summary>
 	public void Destroy () {
-        if (ChildWindows.Count > 0) {
-            foreach (var window in _childWindows) {
+		// Catch double destroy calls
+		if (WindowId == -1) throw new Exception ("Destroy called twice on object");
+
+		foreach (var window in _childWindows.ToList ()) {
 			window.Destroy ();
 		}
-        }
-
-        if (inputHandler is not null) inputHandler.ActiveWindow = null;
-        if (ParentWindow is not null) ParentWindow.RemoveChildWindow (this);
 
 		UnregisterInputHandler ();
 
+		// Prepare for screen clear
+		NCurses.WindowBackground (WindowId, NCurses.ColorPair (-1));
 		SetBorder (false);
 
+		// Clear window and redraw
 		NCurses.ClearWindow (WindowId);
-        Console.Title = "About to destroy";
+		Draw ();
+
 		NCurses.DeleteWindow (WindowId);
-        Console.Title = "Destroyed";
+		_windowId = -1;
 
-        //TODO: Program hangs on DeleteWindow
+		// Ensures sure the parent is updated too
+		if (ParentWindow is not null) {
+			ParentWindow.RemoveChildWindow (this);
+			ParentWindow.Draw ();
+		}
 	}
 
 	/// <summary>
 	/// Register an input handler for this window to attach to OnKeyPress events
 	/// </summary>
-    /// <param name="inputHandler">InputHandler to register</param>
-    public void RegisterInputHandler (InputHandler targetInputHandler) {
-        if (inputHandler is not null) throw new Exception (
+	/// <param name="targetInputHandler">InputHandler to register</param>
+	public void RegisterInputHandler (InputHandler inputHandler) {
+		if (TargetInputHandler is not null) throw new Exception (
 			"Another input handler is already registered"
 		);
 
-        inputHandler = targetInputHandler;
-        inputHandler.OnKeyPress += KeyPressHandler;
+		_targetInputHandler = inputHandler;
+		TargetInputHandler!.OnKeyPress += KeyPressHandler;
 	}
 
 	/// <summary>
 	/// Detach from all OnKeyPress events and unset input handler
 	/// </summary>
 	public void UnregisterInputHandler () {
-        if (inputHandler is null) return;
+		if (TargetInputHandler is null) return;
 
-        inputHandler.OnKeyPress -= KeyPressHandler;
+		if (TargetInputHandler.ActiveWindow == this) TargetInputHandler.ActiveWindow = null;
+		TargetInputHandler.OnKeyPress -= KeyPressHandler;
 	}
 
 	/// <summary>
@@ -233,7 +298,7 @@ public class Window {
 		if (e.SourceWindow != this) return;
 
 		if (OnKeyPress is not null) {
-            OnKeyPress (sender, e);
+			OnKeyPress (this, e);
 		}
 	}
 
@@ -241,9 +306,10 @@ public class Window {
 	/// Tells the input handler this window is active
 	/// </summary>
 	public void SetWindowActive () {
-        if (inputHandler is null) return;
+		if (TargetInputHandler is null) return;
 
-        inputHandler.ActiveWindow = this;
+		TargetInputHandler.ActiveWindow = this;
+		Draw ();
 	}
 
 	/// <summary>
@@ -262,4 +328,28 @@ public class Window {
 			NCurses.Box (WindowId, ' ', ' ');
 		}
 	}
+
+	/// <summary>
+	/// Calcaulates the usable inner width of this window
+	/// </summary>
+	/// <returns>Usable inner width of window in columns</returns>
+	public int GetUsableWidth () {
+		if (BorderEnabled) {
+			return WindowSize.Width - 1 - InnerPadding;
+		} else {
+			return WindowSize.Width;
+		}
+	}
+
+	/// <summary>
+	/// Calcaulates the usable inner height of this window
+	/// </summary>
+	/// <returns>Usable inner height of window in rows</returns>
+	public int GetUsableHeight () {
+		if (BorderEnabled) {
+			return WindowSize.Height - 1 - InnerPadding;
+		} else {
+			return WindowSize.Height;
+		}
+	}
 }

Program.cs

@@ -1,4 +1,5 @@
 using SCI.CursesWrapper;
+using SCI.CursesWrapper.UiElements;
 using ANSI_Fahrplan.Screens;
 using Mindmagma.Curses;
 
@@ -6,8 +7,6 @@ namespace ANSI_Fahrplan;
 
 class Program {
 	private static void Main (string [] args) {
-		//Playground.Run (args);
-
 		/**
 		 * General procedure:
 		 * - Draw welcome screen
@@ -20,96 +19,76 @@ class Program {
 		 **/
 
 		var screen = CursesWrapper.InitNCurses ();
+		//var topLevelWindows = new List<Window> ();
 
 		// -- Screen-wide input handler -- //
-		var inputHandler = new InputHandler (screen);
+		var inputHandler = new InputHandler ();
 		inputHandler.StartListening ();
 
-		// Register quit key on main screen
-		inputHandler.OnKeyPress += (object sender, NCursesKeyPressEventArgs e) => {
-			if (e.SourceWindow is not null) return;
-			if (e.KeyCode != 'q') return;
+		// Register global quit key
+		inputHandler.OnKeyPressPrivileged += (object sender, NCursesKeyPressEventArgs e) => {
+			if (!CursesWrapper.KeyPressIsCtrl (e.KeyCode, 'q')) return;
 
 			NCurses.EndWin ();
 			Console.WriteLine ("Bye-bye!");
 			Environment.Exit (0);
 		};
 
-		// -- Create menu bar -- //
-		//var topMenu = new TopMenu (screen, CreateMenuItems (screen, screenInputHandler));
+		// -- Inner Window -- //
+		//
+		// This window contains all the dynamic content between
+		// the menu and status bars
+		var innerWindow = new InnerWindow (screen, inputHandler) {
+			BorderEnabled = true
+		};
 
-		// -- Show introduction screen -- //
-		// NCurses.GetMaxYX (screen, out int height, out int width);
+		// -- Intro screen -- //
+		var introScreen = new IntroScreen (innerWindow);
 
-		// var innerWindow = NCurses.NewWindow (height - 2, width - 4, 1, 2);
-		// NCurses.Box (innerWindow, (char) 0, (char) 0);
+		// Close intro screen on any keypress
+		introScreen.OnKeyPress += (object sender, NCursesKeyPressEventArgs e) => {
+			((Window) sender).Destroy ();
+		};
 
-		var introScreen = new IntroScreen (screen);
-		introScreen.SetBorder (true);
-		introScreen.Redraw ();
+		introScreen.RegisterInputHandler (inputHandler);
+		introScreen.SetWindowActive ();
 
-		var parentWindow = new Window (3, 3, 10 * 2, 10) {
-			BackgroundColorId = ColorSchemes.TextInputField ()
-		};
-		parentWindow.SetBorder (true);
-		parentWindow.Redraw ();
-
-		var childWindow = new Window (1, 1, 3, 3, parentWindow);
-		childWindow.SetBorder (true);
-		childWindow.Redraw ();
-
-		inputHandler.OnKeyPress += (object sender, NCursesKeyPressEventArgs e) => {
-			if (e.SourceWindow is not null) {
-				NCurses.WindowAddChar (e.SourceWindow.WindowId, e.KeyCode);
-				return;
-			} else {
-				NCurses.AddChar (e.KeyCode);
-			}
+		// Wait until intro screen is closed
+		while (introScreen.WindowId > -1) Thread.Sleep (50); // TODO; Unjank this
 
-			if (e.KeyCode != 'd') return;
 		
-			parentWindow.Destroy ();
-		};
 
-		NCurses.AddString ("Done drawing");
-		NCurses.Refresh ();
+		// -- Create menu bar -- //
+		var topMenu = new TopMenu (screen, inputHandler, CreateMenuItems (innerWindow));
 
 		// Wait until the input handler routine stops
-		while (true) Thread.Sleep (500);
+		while (inputHandler.IsListening ()) Thread.Sleep (50);
 
 		NCurses.EndWin ();
 		Console.WriteLine ("Oh wow, the input handler crashed, that's not supposed to happen. Sorry!");
 		Environment.Exit (1);
 	}
 
-	// private static List<MenuItem> CreateMenuItems (nint screen, InputHandler inputHandler) {
-	// 	var helpItem      = new MenuItem ("Help", "F1", inputHandler);
-	// 	var upcomingItem  = new MenuItem ("Upcoming", "F2", inputHandler);
-	// 	var byDayItem     = new MenuItem ("By Day", "F3", inputHandler);
-	// 	var byRoomItem    = new MenuItem ("By Room", "F4", inputHandler);
-	// 	var bySpeakerItem = new MenuItem ("By Speaker", "F5", inputHandler);
-	// 	var quitItem      = new MenuItem ("Quit", "q", inputHandler);
-		
-	// 	quitItem.OnItemActivated += (object? sender, EventArgs e) => {
-	// 		NCurses.EndWin ();
-	// 		Console.WriteLine ("Bye-bye!");
-	// 		Environment.Exit (0);
-	// 	};
-
-	// 	helpItem.OnItemActivated += (object? sender, EventArgs e) => {
-	// 		InputBox.InputCompleted callback = (string ee) => {
-	// 			NCurses.MoveAddString (3, 3, $"<{ee}>");
-	// 		};
-	// 		new InputBox().RequestInput (screen, inputHandler, callback, "Please enter some text now:");
-	// 	};
-
-	// 	return new List<MenuItem> {
-	// 		helpItem,
-	// 		upcomingItem,
-	// 		byDayItem,
-	// 		byRoomItem,
-	// 		bySpeakerItem,
-	// 		quitItem
-	// 	};
-	// }
+	private static List<MenuItem> CreateMenuItems (InnerWindow innerWindow) {
+		var helpItem	  = new MenuItem ("Help", "F1");
+		var upcomingItem  = new MenuItem ("Upcoming", "b"); //F2
+		var byDayItem	  = new MenuItem ("By Day", "n"); // F3
+		var byRoomItem	  = new MenuItem ("By Room", "F4");
+		var bySpeakerItem = new MenuItem ("By Speaker", "F5");
+		var byTestItem    = new MenuItem ("By Test", "F7");
+		var quitItem	  = new MenuItem ("Quit (C-q)");
+
+		helpItem.OnItemActivated += (object sender, MenuItemActivatedEventArgs e) => {
+			
+		};
+
+		return new List<MenuItem> {
+			helpItem,
+			upcomingItem,
+			byDayItem,
+			byRoomItem,
+			bySpeakerItem,
+			quitItem
+		};
+	}
 }

Screens/HeaderFooter.cs

@@ -1,12 +0,0 @@
-namespace ANSI_Fahrplan.Screens;
-
-/// <summary>
-/// NCurses Header Window
-/// </summary>
-public class Header {
-	
-
-	public Header () {
-
-	}
-}

Screens/IntroScreen.cs

@@ -1,20 +1,18 @@
-using Mindmagma.Curses;
 using SCI.CursesWrapper;
 
 namespace ANSI_Fahrplan.Screens;
 
 public class IntroScreen : Window {
-	private nint infoTextBox;
-
 	/// <summary>
 	/// Pass class constructor through to inherited constructor
 	/// </summary>
 	/// <param name="parentWindow">Parent window of this window object</param>
-	public IntroScreen (nint screen) :
+	public IntroScreen (Window parentWindow) :
 		base (
-			1, 1,
-			CursesWrapper.GetWidth (screen) - 2,
-			CursesWrapper.GetHeight (screen) - 2
+			0, 0,
+			parentWindow.GetUsableWidth (),
+			parentWindow.GetUsableHeight (),
+			parentWindow
 		)
 	{
 		string asciiArtPlusText =

UiElements/InputBox.cs

@@ -1,7 +1,6 @@
-using SCI.CursesWrapper;
 using Mindmagma.Curses;
 
-namespace ANSI_Fahrplan.UiElements;
+namespace SCI.CursesWrapper.UiElements;
 
 public class InputBox {
 	public delegate void InputCompleted (string input);

UiElements/MenuItem.cs

@@ -1,7 +1,6 @@
-using SCI.CursesWrapper;
 using Mindmagma.Curses;
 
-namespace ANSI_Fahrplan.UiElements;
+namespace SCI.CursesWrapper.UiElements;
 
 public class MenuItem {
 	private List<MenuItem> _childItems;
@@ -10,43 +9,75 @@ public class MenuItem {
 	private string _label;
 	public string Label { get { return _label; }}
 
-	private string _key;
-	public string Key { get { return _key; }}
+	private string? _key;
+	public string? Key { get { return _key; }}
 
-	public delegate	void ItemActivated (object sender, EventArgs e);
+	public delegate	void ItemActivated (object sender, MenuItemActivatedEventArgs e);
 
 	// Event fired when menu item is activated
-	public event EventHandler? OnItemActivated;
+	public event ItemActivated? OnItemActivated;
 
-	private InputHandler _inputHandler;
-	public InputHandler InputHandler { get { return _inputHandler; }}
+	private TopMenu? _parentTopMenuWindow;
+	public TopMenu? ParentTopMenuWindow { get { return _parentTopMenuWindow; }}
 
-	public MenuItem (string label, string key, InputHandler inputHandler, List<MenuItem>? childItems = null) {
+	/// <summary>
+	/// Class constructor
+	/// </summary>
+	/// <param name="label"></param>
+	/// <param name="key"></param>
+	/// <param name="childItems"></param>
+	public MenuItem (string label, string? key = null, List<MenuItem>? childItems = null) {
 		_childItems = childItems ?? new List<MenuItem> ();
 		_key = key;
-		_inputHandler = inputHandler;
 		_label = label;
 	}
 
-	public void KeyHandler (object sender, NCursesKeyPressEventArgs e) {
+	/// <summary>
+	/// Sets this menu items parent TopMenu window
+	/// </summary>
+	/// <param name="parent">TopMenu window this menu item belongs to</param>
+	public void AssignParentTopMenuWindow (TopMenu parent) {
+		if (_parentTopMenuWindow is not null) return;
+		_parentTopMenuWindow = parent;
+	}
+
+	/// <summary>
+	/// Called when key on parent TopMenu window is pressed
+	/// </summary>
+	/// <param name="sender">Event sender, should be a Window object</param>
+	/// <param name="e">Key Press Event arguments</param>
+	public void KeypressHandler (object sender, NCursesKeyPressEventArgs e) {
+		// Do not listen to key presses if not hotkey is assigned
+		if (Key is null) return;
+		
+		// Do not react to key presses unless this menu items belongs to a window
+		// and has event listeners upon menu item activation
 		if (OnItemActivated is null) return;
+		if (ParentTopMenuWindow is null) return;
+
+		var eventArgs = new MenuItemActivatedEventArgs (ParentTopMenuWindow, this);
 
 		if (Key.Length > 1 && Key.StartsWith ("F")) { // Handle F keys
 			if (e.KeyCode == CursesKey.KEY_F (int.Parse (Key.Substring (1)))) {
-				OnItemActivated (this, EventArgs.Empty);
+				OnItemActivated (this, eventArgs);
 			}
 		} else if (Key.Length == 1) { // Handle letters and numbers
 			if (e.KeyCode == Key [0]) {
-				OnItemActivated (this, EventArgs.Empty);
+				OnItemActivated (this, eventArgs);
 			}
 		} else throw new NotImplementedException ("Currently only F-keys and letters work for Top Menu actions");
 	}
-
-	public void RegisterKeyHandler () {
-		InputHandler.OnKeyPress += KeyHandler;
 }
 
-	public void UnregisterKeyHandler () {
-		InputHandler.OnKeyPress -= KeyHandler;
+public class MenuItemActivatedEventArgs : EventArgs {
+	private TopMenu _topMenuWindow;
+	public TopMenu TopMenuWindow { get { return _topMenuWindow; }}
+
+	private MenuItem _relatedMenuItem;
+	public MenuItem RelatedMenuItem { get { return _relatedMenuItem; }}
+
+	public MenuItemActivatedEventArgs (TopMenu sourceTopMenuWindow, MenuItem relatedMenuItem) {
+		_topMenuWindow = sourceTopMenuWindow;
+		_relatedMenuItem = relatedMenuItem;
 	}
 }

UiElements/TopMenu.cs

@@ -1,42 +1,49 @@
-using SCI.CursesWrapper;
 using Mindmagma.Curses;
+using System.Collections.ObjectModel;
 
-namespace ANSI_Fahrplan.UiElements;
+namespace SCI.CursesWrapper.UiElements;
 
-public class TopMenu : UiElement {
+public class TopMenu : Window {
 	private List<MenuItem> _menuItems = new List<MenuItem> ();
-	public List<MenuItem> MenuItems {
+	public ReadOnlyCollection<MenuItem> MenuItems {
 		get {
-			return _menuItems;
-		}
-		set {
-			UnregisterItemEventHandlers ();
-			_menuItems = value;
-			RegisterItemEventHandlers ();
-			DrawMenu ();
+			return _menuItems.AsReadOnly ();
 		}
 	}
 
 	private MenuItem? activeMenuItem;
 
-	public TopMenu (nint screen, List<MenuItem> menuItems) : base (screen) {
-		NCurses.GetMaxYX (screen, out _, out int width);		
-		innerWindow = NCurses.NewWindow (1, width, 0, 0);
-		
+	/// <summary>
+	/// Class constructor
+	/// </summary>
+	/// <param name="screen"></param>
+	/// <param name="targetInputHandler"></param>
+	/// <param name="menuItems"></param>
+	public TopMenu (nint screen, InputHandler targetInputHandler, List<MenuItem> menuItems) :
+		base (0, 0, CursesWrapper.GetWidth (screen), 1, targetInputHandler)
+	{
 		var colorSchemeNormal = ColorSchemes.TopMenuNormal ();
-		NCurses.WindowBackground (innerWindow, colorSchemeNormal);
-		NCurses.WindowAttributeOn (innerWindow, colorSchemeNormal);
+		BackgroundColorId = colorSchemeNormal;
+		NCurses.WindowAttributeOn (WindowId, colorSchemeNormal);
 
-		MenuItems = menuItems;
+		_menuItems = menuItems;
+		foreach (var item in menuItems) {
+			item.AssignParentTopMenuWindow (this);
+		}
+
+		RegisterItemEventHandlers ();
+		DrawMenu ();
 	}
 
 	/// <summary>
 	/// Register key event handlers for each menu item
 	/// </summary>
 	private void RegisterItemEventHandlers () {
+		if (TargetInputHandler is null) return;
+
 		foreach (var item in MenuItems) {
 			item.OnItemActivated += ItemActivatedHandler;
-			item.RegisterKeyHandler ();
+			TargetInputHandler.OnKeyPressPrivileged += item.KeypressHandler;
 		}
 	}
 
@@ -44,9 +51,11 @@ public class TopMenu : UiElement {
 	/// Unregister key event handlers for each menu item
 	/// </summary>
 	private void UnregisterItemEventHandlers () {
+		if (TargetInputHandler is null) return;
+
 		foreach (var item in MenuItems) {
 			item.OnItemActivated -= ItemActivatedHandler;
-			item.UnregisterKeyHandler ();
+			OnKeyPress -= item.KeypressHandler;
 		}
 	}
 
@@ -66,7 +75,7 @@ public class TopMenu : UiElement {
 	/// Draw the top menu with currently configured menu items
 	/// </summary>
 	private void DrawMenu () {
-		NCurses.ClearWindow (innerWindow);
+		NCurses.ClearWindow (WindowId);
 
 		var normalColor = ColorSchemes.TopMenuNormal ();
 		var activeColor = ColorSchemes.TopMenuActive ();
@@ -77,8 +86,8 @@ public class TopMenu : UiElement {
 
 			if (itemIsActive) {
 				itemString = "[";
-				NCurses.WindowAttributeOff (innerWindow, normalColor);
-				NCurses.WindowAttributeOn (innerWindow, activeColor);
+				NCurses.WindowAttributeOff (WindowId, normalColor);
+				NCurses.WindowAttributeOn (WindowId, activeColor);
 			}
 			
 			itemString += $"{item.Label}";
@@ -88,21 +97,16 @@ public class TopMenu : UiElement {
 			}
 
 			if (itemIsActive) {
-				NCurses.WindowAttributeOff (innerWindow, activeColor);
-				NCurses.WindowAttributeOn (innerWindow, normalColor);
+				NCurses.WindowAttributeOff (WindowId, activeColor);
+				NCurses.WindowAttributeOn (WindowId, normalColor);
 				itemString += "] ";
 			} else {
 				itemString += "  ";
 			}
 
-			NCurses.WindowAddString (innerWindow, itemString);
+			NCurses.WindowAddString (WindowId, itemString);
 		}
 
-		NCurses.Refresh ();
-		NCurses.WindowRefresh (innerWindow);
-	}
-
-	public void Refresh () {
-		DrawMenu ();
+		Draw ();
 	}
 }