Began adding Window class

CursesWrapper/ColorSchemes.cs

@@ -1,6 +1,6 @@
 using Mindmagma.Curses;
 
-namespace ANSI_Fahrplan;
+namespace SCI.CursesWrapper;
 
 public class ColorSchemes {
 	public static void InitAll () {

CursesWrapper/CursesWrapper.cs

@@ -0,0 +1,41 @@
+using Mindmagma.Curses;
+
+namespace SCI.CursesWrapper;
+
+public class CursesWrapper {
+    /// <summary>
+    /// Initializes NCurses and creates a screen
+    /// </summary>
+    public static nint InitNCurses () {
+        var screen = NCurses.InitScreen ();
+		NCurses.SetCursor (0);
+		NCurses.NoEcho ();
+
+        if (NCurses.HasColors ()) {
+			NCurses.StartColor ();
+			ColorSchemes.InitAll ();
+		}
+
+        return screen;
+    }
+
+    /// <summary>
+    /// Get the total width of a window
+    /// </summary>
+    /// <param name="window">Window to query</param>
+    /// <returns>Width of window in columns</returns>
+    public static int GetWidth (nint window) {
+        NCurses.GetMaxYX (window, out int _, out int width);
+        return width;
+    }
+
+    /// <summary>
+    /// Get the total height of a window
+    /// </summary>
+    /// <param name="window">Window to query</param>
+    /// <returns>Height of window in rows</returns>
+    public static int GetHeight (nint window) {
+        NCurses.GetMaxYX (window, out int height, out int _);
+        return height;
+    }
+}

CursesWrapper/InputHandler.cs

@@ -1,7 +1,6 @@
-using System.Security.Principal;
 using Mindmagma.Curses;
 
-namespace ANSI_Fahrplan;
+namespace SCI.CursesWrapper;
 
 public class InputHandler {
 	/// <summary>
@@ -11,35 +10,54 @@ public class InputHandler {
 	/// <param name="e">Event arguments with details like the pressed key code</param>
 	public delegate	void KeypressEventHandler (object sender, NCursesKeyPressEventArgs e);
 
-	// Event fired when key is pressed
+	/// <summary>
+	/// Event handlers for NCurses key presses
+	/// </summary>
 	public event KeypressEventHandler? OnKeyPress;
 
-	// Similar to OnKeyPress, but called before any regular OnKeyPress event handlers are called
+	/// <summary>
+	/// Event Handlers called before the regular OnKeyPress handlers are called
+	/// </summary>
 	public event KeypressEventHandler? OnKeyPressPrivileged;
 
-	// When this variable is set, no event handlers will be called except this one
-	// Once e.CancelNextEvent is true from this event, it will be set to null again
-	private KeypressEventHandler? _rawKeyPressHandler;
-	public KeypressEventHandler? RawKeyPressHandler { get { return _rawKeyPressHandler; }}
-
-	private nint _targetWindow;
-	public nint TargetWindow { get { return _targetWindow; }}
+	/// <summary>
+	/// Gets or sets the window this InputHandler is listening to
+	/// </summary>
+	private Window? _activeWindow;
+	public Window? ActiveWindow {
+		get {
+			return _activeWindow;
+		}
+		set {
+			_activeWindow = value;
+		}
+	}
 
-	private CancellationTokenSource? listeningRoutineCts;
+	/// <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>
 	private Task? listeningTask;
 
+	/// <summary>
+	/// Cancellation Token Source to stop the listening task
+	/// </summary>
+	private CancellationTokenSource? listeningRoutineCts;
+
 	/// <summary>
 	/// Class constructor
+	/// <paramref name="screen">Parent screen this InputHandler is attached to</paramref>
 	/// </summary>
-	/// <param name="targetWindow">Window for which to listen to key presses</param>
-	public InputHandler (nint targetWindow) {
-		_targetWindow = targetWindow;
+	public InputHandler (nint screen) {
+		rootScreen = screen;
 	}
 
 	/// <summary>
 	/// Start listening to key presses and call registered callbacks
-	/// <paramref name="window">Window to listen to key presses in<param/>
 	/// </summary>
 	public void StartListening () {
 		if (IsListening ()) return;
@@ -62,7 +80,9 @@ public class InputHandler {
 		listeningTask.Wait ();
 		listeningTask = null;
 
-		NCurses.Keypad (TargetWindow, false);
+		if (ActiveWindow is not null) {
+			NCurses.Keypad (ActiveWindow.WindowId, false);
+		}
 	}
 
 	/// <summary>
@@ -77,43 +97,29 @@ public class InputHandler {
 	}
 
 	/// <summary>
-	/// Enable temporary raw keypress event handler to forward
-	/// all keypressed directly to a specific function
+	/// Prepares the window for proper key press reading
 	/// </summary>
-	/// <param name="eventHandler">Event handler to pass key presses to</param>
-	/// <param name="screen">Screen to pass key char duty to</param>
-	public void EnableRawEventHandler (KeypressEventHandler eventHandler, nint? window = null) {
-		if (window is not null) {
-			StopListening ();
-			_targetWindow = (nint) window;
-			StartListening ();
+	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);
 		}
-
-		_rawKeyPressHandler = eventHandler;
 	}
 
 	/// <summary>
-	/// Disables the temporary raw keypress event handler
-	/// <param name="screen">Screen to pass key char duty back to</param>
+	/// Undoes any changes the setup routine configured for the active window
 	/// </summary>
-	public void DisableRawEventHandler (nint? screen = null) {
-		if (RawKeyPressHandler is null) return;
-
-		if (screen is not null) {
-			StopListening ();
-			_targetWindow = (nint) screen;
-			StartListening ();
+	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);
 		}
-
-		_rawKeyPressHandler = null;
-	}
-
-	/// <summary>
-	/// Prepares the window for proper key press reading
-	/// </summary>
-	private void WindowSetup () {
-		NCurses.Keypad (TargetWindow, true);
-		NCurses.NoDelay (TargetWindow, false);
 	}
 
 	/// <summary>
@@ -124,35 +130,38 @@ public class InputHandler {
 
 		WindowSetup ();
 
+		int keyCode = -1;
+
 		while (!listeningRoutineCts.Token.IsCancellationRequested) {
-			int keyCode = NCurses.WindowGetChar (TargetWindow);
+			if (OnKeyPress is null) {
+				Console.Title = "No handlers";
+			} else {
+				Console.Title = $"Got {OnKeyPress.GetInvocationList ().Length} handlers";
+			}
+			
+			if (ActiveWindow is not null) {
+				keyCode = NCurses.WindowGetChar (ActiveWindow.WindowId);
+			} else {
+				keyCode = NCurses.GetChar ();
+			}
 
 			// Do nothing until the key code is larger than -1
 			if (keyCode < 0) continue;
 
-			var eventArgs = new NCursesKeyPressEventArgs (keyCode, TargetWindow);
-
-			// If enabled, forward all key pressed directly to raw keypress event handler
-			if (RawKeyPressHandler is not null) {
-				RawKeyPressHandler (this, eventArgs);
-				continue;
-			}
-
-			var skipRegularEventHandlers = false;
-
+			var eventArgs = new NCursesKeyPressEventArgs (keyCode, ActiveWindow);
+			
 			// Handle any registered privileged key handlers
 			if (OnKeyPressPrivileged is not null) {
 				foreach (KeypressEventHandler h in OnKeyPressPrivileged.GetInvocationList ()) {
 					h (this, eventArgs);
 					if (eventArgs.CancelNextEvent == true) {
-						skipRegularEventHandlers = true;
 						break;
 					}
 				}
 			}
 
 			// Handle any regular registered key handlers
-			if (OnKeyPress is not null && !skipRegularEventHandlers) {
+			if (OnKeyPress is not null) {
 				foreach (KeypressEventHandler h in OnKeyPress.GetInvocationList ()) {
 					h (this, eventArgs);
 					if (eventArgs.CancelNextEvent == true) continue ;
@@ -169,13 +178,13 @@ public class NCursesKeyPressEventArgs : EventArgs {
 	private int _keyCode;
 	public int KeyCode { get { return _keyCode; }}
 	
-	private nint _targetWindow;
-	public nint TargetWindow { get { return _targetWindow; }}
+	private Window? _sourceWindow;
+	public Window? SourceWindow { get { return _sourceWindow; }}
 
 	public bool CancelNextEvent { get; set; } = false;
 
-	public NCursesKeyPressEventArgs (int keyCode, nint targetWindow) {
+	public NCursesKeyPressEventArgs (int keyCode, Window? sourceWindow) {
 		_keyCode = keyCode;
-		_targetWindow = targetWindow;
+		_sourceWindow = sourceWindow;
 	}
 }

CursesWrapper/Window.cs

@@ -0,0 +1,265 @@
+using System.Collections.ObjectModel;
+using System.Drawing;
+using Mindmagma.Curses;
+
+namespace SCI.CursesWrapper;
+
+public class Window {
+    /// <summary>
+    /// Gets or sets the window position on the screen
+    /// </summary>
+    private Point _position;
+    public Point Position {
+        get {
+            return _position;
+        }
+        set {
+            if (ParentWindow is not null) {
+                NCurses.WindowMove (
+                    WindowId,
+                    ParentWindow.Position.Y + value.Y,
+                    ParentWindow.Position.X + value.X
+                );
+            } else {
+                NCurses.WindowMove (
+                    WindowId,
+                    value.Y,
+                    value.X
+                );
+            }
+            _position = value;
+        }
+    }
+
+    /// <summary>
+    /// Gets or sets the width and height of the window
+    /// </summary>
+    private Size _windowSize;
+    public Size WindowSize {
+        get {
+            return _windowSize;
+        }
+        set {
+            _windowSize = value;
+        }
+    }
+
+    /// <summary>
+    /// Gets or sets the window background color pair
+    /// </summary>
+    private uint _backgroundColorId;
+    public uint BackgroundColorId {
+        get {
+            return _backgroundColorId;
+        }
+        set {
+            NCurses.WindowBackground (WindowId, value);
+            Redraw ();
+            _backgroundColorId = value;
+        }
+    }
+
+    /// <summary>
+    /// Sets the parent window
+    /// </summary>
+    private Window? _parentWindow;
+    public Window?  ParentWindow { get { return _parentWindow; }}
+
+    /// <summary>
+    /// Holds a list of children windows this window posesses
+    /// </summary>
+    private List<Window> _childWindows = new List<Window> ();
+    public ReadOnlyCollection<Window> ChildWindows { get { return _childWindows.AsReadOnly (); }}
+
+    /// <summary>
+    /// Holds the pointer for this window
+    /// </summary>
+    private nint _windowId;
+    public nint WindowId { get { return _windowId; }}
+
+    /// <summary>
+    /// Input handler assigned to this window
+    /// </summary>
+    private InputHandler? inputHandler;
+
+    /// <summary>
+    /// Event handler called when this window is active and a key is pressed
+    /// </summary>
+    public event InputHandler.KeypressEventHandler? OnKeyPress;
+
+    /// <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="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
+            );
+        }
+
+        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) {
+        if (parentWindow is not null) {
+            _windowId = NCurses.SubWindow (
+                parentWindow.WindowId,
+                windowSize.Height, windowSize.Width,
+                position.Y, position.X
+            );
+        } else {
+            _windowId = NCurses.NewWindow (
+                windowSize.Height, windowSize.Width,
+                position.Y, position.X
+            );
+        }
+
+        Redraw ();
+    }
+
+    /// <summary>
+    /// Adds a child window to this window
+    /// </summary>
+    /// <param name="child"></param>
+    public void AddChildWindow (Window child) {
+        if (_childWindows.Contains (child)) return;
+        _childWindows.Add (child);
+    }
+
+    /// <summary>
+    /// Removes a child window from this window
+    /// </summary>
+    /// <param name="child"></param>
+    public void RemoveChildWindow (Window child) {
+        if (!_childWindows.Contains (child)) return;
+        _childWindows.Remove (child);
+    }
+
+    /// <summary>
+    /// Discards all optimization options about drawn parts of this window.
+    /// Call before drawing a sub window
+    /// </summary>
+    public void TouchWin () {
+        NCurses.TouchWindow (WindowId);
+    }
+
+    /// <summary>
+    /// Redraws this window
+    /// </summary>
+    public void Redraw () {
+        NCurses.Refresh (); // TODO: Necessary?
+
+        if (ChildWindows.Count > 0) {
+            foreach (var window in ChildWindows) {
+                window.Redraw ();
+            }
+        }
+
+        if (ParentWindow is not null) ParentWindow.TouchWin ();
+        NCurses.WindowRefresh (WindowId);
+    }
+
+    /// <summary>
+    /// Destroys this window and all children windows
+    /// </summary>
+    public void Destroy () {
+        if (ChildWindows.Count > 0) {
+            foreach (var window in _childWindows) {
+                window.Destroy ();
+            }
+        }
+
+        if (inputHandler is not null) inputHandler.ActiveWindow = null;
+        if (ParentWindow is not null) ParentWindow.RemoveChildWindow (this);
+
+        UnregisterInputHandler ();
+
+        SetBorder (false);
+
+        NCurses.ClearWindow (WindowId);
+        Console.Title = "About to destroy";
+        NCurses.DeleteWindow (WindowId);
+        Console.Title = "Destroyed";
+
+        //TODO: Program hangs on DeleteWindow
+    }
+
+    /// <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 (
+            "Another input handler is already registered"
+        );
+
+        inputHandler = targetInputHandler;
+        inputHandler.OnKeyPress += KeyPressHandler;
+    }
+
+    /// <summary>
+    /// Detach from all OnKeyPress events and unset input handler
+    /// </summary>
+    public void UnregisterInputHandler () {
+        if (inputHandler is null) return;
+
+        inputHandler.OnKeyPress -= KeyPressHandler;
+    }
+
+    /// <summary>
+    /// Handle key press events from the input handler
+    /// </summary>
+    /// <param name="sender"></param>
+    /// <param name="e"></param>
+    private void KeyPressHandler (object sender, NCursesKeyPressEventArgs e) {
+        if (e.SourceWindow != this) return;
+
+        if (OnKeyPress is not null) {
+            OnKeyPress (sender, e);
+        }
+    }
+
+    /// <summary>
+    /// Tells the input handler this window is active
+    /// </summary>
+    public void SetWindowActive () {
+        if (inputHandler is null) return;
+
+        inputHandler.ActiveWindow = this;
+    }
+
+    /// <summary>
+    /// Enables or disables a border around this window
+    /// </summary>
+    /// <param name="enabled">Sets the status of the border</param>
+    /// <param name="horizontalChar">If specified, uses this character as the top and bottom border</param>
+    /// <param name="verticalChar">If specified, uses this character as the left and right border</param>
+    public void SetBorder (bool enabled, char? horizontalChar = null, char? verticalChar = null) {
+        if (horizontalChar is null) horizontalChar = (char) 0;
+        if (verticalChar   is null) verticalChar   = (char) 0;
+        
+        if (enabled) {
+            NCurses.Box (WindowId, (char) horizontalChar, (char) verticalChar);
+        } else {
+            NCurses.Box (WindowId, ' ', ' ');
+        }
+    }
+}

Program.cs

@@ -1,5 +1,5 @@
-using ANSI_Fahrplan.Screens;
-using ANSI_Fahrplan.UiElements;
+using SCI.CursesWrapper;
+using ANSI_Fahrplan.Screens;
 using Mindmagma.Curses;
 
 namespace ANSI_Fahrplan;
@@ -19,31 +19,60 @@ class Program {
 		 * - User can change the list type with function keys
 		 **/
 
-		var screen = NCurses.InitScreen ();
-		NCurses.SetCursor (0);
-		NCurses.NoEcho ();
-
-		var hasColors = NCurses.HasColors ();
-        if (hasColors) {
-			NCurses.StartColor ();
-			ColorSchemes.InitAll ();
-		}
+		var screen = CursesWrapper.InitNCurses ();
 
 		// -- Screen-wide input handler -- //
-		var screenInputHandler = new InputHandler (screen);
-		screenInputHandler.StartListening ();
+		var inputHandler = new InputHandler (screen);
+		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;
+
+			NCurses.EndWin ();
+			Console.WriteLine ("Bye-bye!");
+			Environment.Exit (0);
+		};
 
 		// -- Create menu bar -- //
-		var topMenu = new TopMenu (screen, CreateMenuItems (screen, screenInputHandler));
+		//var topMenu = new TopMenu (screen, CreateMenuItems (screen, screenInputHandler));
 
 		// -- Show introduction screen -- //
-		NCurses.GetMaxYX (screen, out int height, out int width);
+		// NCurses.GetMaxYX (screen, out int height, out int width);
+
+		// var innerWindow = NCurses.NewWindow (height - 2, width - 4, 1, 2);
+		// NCurses.Box (innerWindow, (char) 0, (char) 0);
+
+		var introScreen = new IntroScreen (screen);
+		introScreen.SetBorder (true);
+		introScreen.Redraw ();
+
+		var parentWindow = new Window (3, 3, 10 * 2, 10) {
+			BackgroundColorId = ColorSchemes.TextInputField ()
+		};
+		parentWindow.SetBorder (true);
+		parentWindow.Redraw ();
 
-		var innerWindow = NCurses.NewWindow (height - 2, width - 4, 1, 2);
-		NCurses.Box (innerWindow, (char) 0, (char) 0);
+		var childWindow = new Window (1, 1, 3, 3, parentWindow);
+		childWindow.SetBorder (true);
+		childWindow.Redraw ();
 
-		//var introScreen = new IntroScreen (innerWindow);
-		//introScreen.Show ();
+		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);
+			}
+			
+			if (e.KeyCode != 'd') return;
+
+			parentWindow.Destroy ();
+		};
+
+		NCurses.AddString ("Done drawing");
+		NCurses.Refresh ();
 
 		// Wait until the input handler routine stops
 		while (true) Thread.Sleep (500);
@@ -53,34 +82,34 @@ class Program {
 		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);
+	// 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);
-		};
+	// 	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:");
-		};
+	// 	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
-		};
-	}
+	// 	return new List<MenuItem> {
+	// 		helpItem,
+	// 		upcomingItem,
+	// 		byDayItem,
+	// 		byRoomItem,
+	// 		bySpeakerItem,
+	// 		quitItem
+	// 	};
+	// }
 }

Screens/IntroScreen.cs

@@ -1,32 +1,28 @@
 using Mindmagma.Curses;
+using SCI.CursesWrapper;
 
 namespace ANSI_Fahrplan.Screens;
 
-public class IntroScreen : Screen {
+public class IntroScreen : Window {
 	private nint infoTextBox;
 
 	/// <summary>
 	/// Pass class constructor through to inherited constructor
 	/// </summary>
-	/// <param name="rootWindow">Root window to use for this screen</param>
-	public IntroScreen (nint rootWindow) : base (rootWindow) { }
-
-	public override void Show () {
-		string asciiArtPlusText =
-			"Press F1 for a quick start guide or simply press Enter\n" +
-			"to see upcoming events\n" +
-			AsciiArt.logo38c3_80x24 +
-			"\n38C3 Fahrplan in your terminal!";
-
-		AsciiArt.ShowCentered (RootWindow, asciiArtPlusText);
-
-		//infoTextBox = NCurses.SubWindow (infoTextBox, );
-
-		NCurses.Refresh ();
-		NCurses.WindowRefresh (RootWindow);
-	}
-
-	public override void Hide () {
-
+	/// <param name="parentWindow">Parent window of this window object</param>
+	public IntroScreen (nint screen) :
+		base (
+			1, 1,
+			CursesWrapper.GetWidth (screen) - 2,
+			CursesWrapper.GetHeight (screen) - 2
+		)
+	{
+			string asciiArtPlusText =
+				"Press F1 for a quick start guide or simply press Enter\n" +
+				"to see upcoming events\n" +
+				AsciiArt.logo38c3_80x24 +
+				"\n38C3 Fahrplan in your terminal!";
+
+			AsciiArt.ShowCentered (WindowId, asciiArtPlusText);
 	}
 }

Screens/ScrollableScreen.cs

@@ -0,0 +1,8 @@
+namespace ANSI_Fahrplan.Screens;
+
+public abstract class ScrollableScreen : Screen {
+    
+    public ScrollableScreen (nint rootWindow) : base (rootWindow) {}
+
+    
+}

UiElements/InputBox.cs

@@ -1,4 +1,4 @@
-using System.Runtime.InteropServices.Marshalling;
+using SCI.CursesWrapper;
 using Mindmagma.Curses;
 
 namespace ANSI_Fahrplan.UiElements;
@@ -77,7 +77,7 @@ public class InputBox {
 				NCurses.SetCursor (0);
 				NCurses.NoEcho ();
 				
-				inputHandler.DisableRawEventHandler (screen);
+				//inputHandler.DisableRawEventHandler (screen);
 
 				NCurses.MoveWindow (screen, 0, 0);
 				NCurses.DeleteWindow (inputFieldWin);
@@ -93,6 +93,6 @@ public class InputBox {
 			NCurses.MoveWindow (inputFieldWin, inputFieldWinY, inputFieldWinX);
 		};
 
-		inputHandler.EnableRawEventHandler (handlerFunction, inputFieldWin);
+		//inputHandler.EnableRawEventHandler (handlerFunction, inputFieldWin);
 	}
 }

UiElements/MenuItem.cs

@@ -1,3 +1,4 @@
+using SCI.CursesWrapper;
 using Mindmagma.Curses;
 
 namespace ANSI_Fahrplan.UiElements;

UiElements/TopMenu.cs

@@ -1,3 +1,4 @@
+using SCI.CursesWrapper;
 using Mindmagma.Curses;
 
 namespace ANSI_Fahrplan.UiElements;