Terminal.Gui/Example/demo.cs

using Terminal.Gui;
using System;
using Mono.Terminal;

static class Demo {
	class Box10x : View {
		public Box10x (int x, int y) : base (new Rect (x, y, 10, 10))
		{
		}

		public override void Redraw (Rect region)
		{
			Driver.SetAttribute (ColorScheme.Focus);

			for (int y = 0; y < 10; y++) {
				Move (0, y);
				for (int x = 0; x < 10; x++) {

					Driver.AddRune ((Rune)('0' + (x + y) % 10));
				}
			}

		}
	}

	class Filler : View {
		public Filler (Rect rect) : base (rect)
		{
		}

		public override void Redraw (Rect region)
		{
			Driver.SetAttribute (ColorScheme.Focus);
			var f = Frame;

			for (int y = 0; y < f.Width; y++) {
				Move (0, y);
				for (int x = 0; x < f.Height; x++) {
					Rune r;
					switch (x % 3) {
					case 0:
						r = '.';
						break;
					case 1:
						r = 'o';
						break;
					default:
						r = 'O';
						break;
					}
					Driver.AddRune (r);
				}
			}
		}
	}


	static void ShowTextAlignments (View container)
	{
		container.Add (
			new Label (new Rect (0, 0, 40, 3), "1-Hello world, how are you doing today") { TextAlignment = TextAlignment.Left },
			new Label (new Rect (0, 4, 40, 3), "2-Hello world, how are you doing today") { TextAlignment = TextAlignment.Right },
			new Label (new Rect (0, 8, 40, 3), "3-Hello world, how are you doing today") { TextAlignment = TextAlignment.Centered },
			new Label (new Rect (0, 12, 40, 3), "4-Hello world, how are you doing today") { TextAlignment = TextAlignment.Justified });
	}

	static void ShowEntries (View container)
	{
		var scrollView = new ScrollView (new Rect (50, 10, 20, 8)) {
			ContentSize = new Size (100, 100),
			ContentOffset = new Point (-1, -1),
			ShowVerticalScrollIndicator = true,
			ShowHorizontalScrollIndicator = true
		};

		scrollView.Add (new Box10x (0, 0));
		//scrollView.Add (new Filler (new Rect (0, 0, 40, 40)));

		// This is just to debug the visuals of the scrollview when small
		var scrollView2 = new ScrollView (new Rect (72, 10, 3, 3)) {
			ContentSize = new Size (100, 100),
			ShowVerticalScrollIndicator = true,
			ShowHorizontalScrollIndicator = true
		};
		scrollView2.Add (new Box10x (0, 0));
		var progress = new ProgressBar (new Rect (68, 1, 10, 1));
		bool timer (MainLoop caller)
		{
			progress.Pulse ();
			return true;
		}

		//Application.MainLoop.AddTimeout (TimeSpan.FromMilliseconds (300), timer);


		// A little convoluted, this is because I am using this to test the
		// layout based on referencing elements of another view:

		var login = new Label ("Login: ") { X = 3, Y = 6 };
		var password = new Label ("Password: ") {
			X = Pos.Left (login),
			Y = Pos.Bottom (login) + 1
		};
		var loginText = new TextField ("") {
			X = Pos.Right (password),
			Y = Pos.Top (login),
			Width = 40
		};
		var passText = new TextField ("") {
			Secret = true,
			X = Pos.Left (loginText),
			Y = Pos.Top (password),
			Width = Dim.Width (loginText)
		};

		// Add some content
		container.Add (
			login,
			loginText,
			password,
			passText,
			new FrameView (new Rect (3, 10, 25, 6), "Options"){
				new CheckBox (1, 0, "Remember me"),
				new RadioGroup (1, 2, new [] { "_Personal", "_Company" }),
			},
			new ListView (new Rect (60, 6, 16, 4), new string [] {
				"First row",
				"<>",
				"This is a very long row that should overflow what is shown",
				"4th",
				"There is an empty slot on the second row",
				"Whoa",
				"This is so cool"
			}),
			scrollView,
			//scrollView2,
			new Button (3, 19, "Ok"),
			new Button (10, 19, "Cancel"),
			progress,
			new Label (3, 22, "Press ESC and 9 to activate the menubar")
		);

	}

	public static Label ml2;

	static void NewFile ()
	{
		var d = new Dialog (
			"New File", 50, 20,
			new Button ("Ok", is_default: true) { Clicked = () => { Application.RequestStop (); } },
			new Button ("Cancel") { Clicked = () => { Application.RequestStop (); } });
		ml2 = new Label (1, 1, "Mouse Debug Line");
		d.Add (ml2);
		Application.Run (d);
	}

	// 
	// Creates a nested editor
	static void Editor(Toplevel top) {
		var tframe = top.Frame;
		var ntop = new Toplevel(tframe);
		var menu = new MenuBar(new MenuBarItem[] {
			new MenuBarItem ("_File", new MenuItem [] {
				new MenuItem ("_Close", "", () => {Application.RequestStop ();}),
			}),
			new MenuBarItem ("_Edit", new MenuItem [] {
				new MenuItem ("_Copy", "", null),
				new MenuItem ("C_ut", "", null),
				new MenuItem ("_Paste", "", null)
			}),
		});
		ntop.Add(menu);

		string fname = null;
		foreach (var s in new[] { "/etc/passwd", "c:\\windows\\win.ini" })
			if (System.IO.File.Exists(s)) {
				fname = s;
				break;
			}

		var win = new Window(fname ?? "Untitled") {
			X = 0,
			Y = 1,
			Width = Dim.Fill(),
			Height = Dim.Fill()
		};
		ntop.Add(win);

		var text = new TextView(new Rect(0, 0, tframe.Width - 2, tframe.Height - 3));
		
		if (fname != null)
			text.Text = System.IO.File.ReadAllText (fname);
		win.Add (text);

		Application.Run (ntop);
	}

	static bool Quit ()
	{
		var n = MessageBox.Query (50, 7, "Quit Demo", "Are you sure you want to quit this demo?", "Yes", "No");
		return n == 0;
	}

	static void Close ()
	{
		MessageBox.ErrorQuery (50, 5, "Error", "There is nothing to close", "Ok");
	}

	// Watch what happens when I try to introduce a newline after the first open brace
	// it introduces a new brace instead, and does not indent.  Then watch me fight
	// the editor as more oddities happen.

	public static void Open ()
	{
		var d = new OpenDialog ("Open", "Open a file");
		Application.Run (d);
	}

	public static void ShowHex (Toplevel top)
	{
		var tframe = top.Frame;
		var ntop = new Toplevel (tframe);
		var menu = new MenuBar (new MenuBarItem [] {
			new MenuBarItem ("_File", new MenuItem [] {
				new MenuItem ("_Close", "", () => {Application.RequestStop ();}),
			}),
		});
		ntop.Add (menu);

		var win = new Window ("/etc/passwd") {
			X = 0,
			Y = 1,
			Width = Dim.Fill (),
			Height = Dim.Fill ()
		};
		ntop.Add (win);

		var source = System.IO.File.OpenRead ("/etc/passwd");
		var hex = new HexView (source) {
			X = 0,
			Y = 0,
			Width = Dim.Fill (),
			Height = Dim.Fill ()
		};
		win.Add (hex);
		Application.Run (ntop);
			
	}

	public static Label ml;
	static void Main ()
	{
		//Application.UseSystemConsole = true;
		Application.Init ();
		var top = Application.Top;
		var tframe = top.Frame;
		//Open ();
#if true
		var win = new Window ("Hello") {
			X = 0,
			Y = 1,
			Width = Dim.Fill (),
			Height = Dim.Fill ()
		};
#else
		var win = new Window (new Rect (0, 1, tframe.Width, tframe.Height - 1), "Hello");
#endif
		var menu = new MenuBar (new MenuBarItem [] {
			new MenuBarItem ("_File", new MenuItem [] {
				new MenuItem ("Text Editor Demo", "", () => { Editor (top); }),
				new MenuItem ("_New", "Creates new file", NewFile),
				new MenuItem ("_Open", "", Open),
				new MenuItem ("_Hex", "", () => ShowHex (top)),
				new MenuItem ("_Close", "", () => Close ()),
				new MenuItem ("_Quit", "", () => { if (Quit ()) top.Running = false; })
			}),
			new MenuBarItem ("_Edit", new MenuItem [] {
				new MenuItem ("_Copy", "", null),
				new MenuItem ("C_ut", "", null),
				new MenuItem ("_Paste", "", null)
			}),
		});

		ShowEntries (win);

		int count = 0;
		ml = new Label (new Rect (3, 17, 47, 1), "Mouse: ");
		Application.RootMouseEvent += delegate (MouseEvent me) {

			ml.Text = $"Mouse: ({me.X},{me.Y}) - {me.Flags} {count++}";
		};

		win.Add (ml);

		// ShowTextAlignments (win);
		top.Add (win);
		top.Add (menu);
		Application.Run ();
	}
}