gui-cs.Terminal.Gui/UICatalog/Scenarios/Buttons.cs

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Text;
using JetBrains.Annotations;
using Terminal.Gui;

namespace UICatalog.Scenarios;

[ScenarioMetadata ("Buttons", "Demonstrates all sorts of Buttons.")]
[ScenarioCategory ("Controls")]
[ScenarioCategory ("Layout")]
public class Buttons : Scenario
{
    public override void Main ()
    {
        Application.Init ();

        Window main = new ()
        {
            Title = GetQuitKeyAndName ()
        };

        // Add a label & text field so we can demo IsDefault
        var editLabel = new Label { X = 0, Y = 0, Text = "TextField (to demo IsDefault):" };
        main.Add (editLabel);

        // Add a TextField using Absolute layout. 
        var edit = new TextField { X = 31, Width = 15, HotKey = Key.Y.WithAlt };
        main.Add (edit);

        // This is the default button (IsDefault = true); if user presses ENTER in the TextField
        // the scenario will quit
        var defaultButton = new Button { X = Pos.Center (), Y = Pos.AnchorEnd (), IsDefault = true, Text = "_Quit" };

        main.Add (defaultButton);

        // Note we handle Accept on main, not defaultButton
        main.Accepting += (s, e) => Application.RequestStop ();

        var swapButton = new Button
        {
            X = 50,
            Width = 45,
            Height = 3,
            Text = "S_wap Default (Size = 45, 3)",
            ColorScheme = Colors.ColorSchemes ["Error"]
        };

        swapButton.Accepting += (s, e) =>
                             {
                                 e.Cancel = !swapButton.IsDefault;
                                 defaultButton.IsDefault = !defaultButton.IsDefault;
                                 swapButton.IsDefault = !swapButton.IsDefault;
                             };

        defaultButton.Accepting += (s, e) =>
                                {
                                    e.Cancel = !defaultButton.IsDefault;

                                    if (e.Cancel)
                                    {
                                        MessageBox.ErrorQuery ("Error", "This button is no longer the Quit button; the Swap Default button is.", "_Ok");
                                    }
                                };
        main.Add (swapButton);

        static void DoMessage (Button button, string txt)
        {
            button.Accepting += (s, e) =>
                             {
                                 string btnText = button.Text;
                                 MessageBox.Query ("Message", $"Did you click {txt}?", "Yes", "No");
                                 e.Cancel = true;
                             };
        }

        var colorButtonsLabel = new Label { X = 0, Y = Pos.Bottom (swapButton) + 1, Text = "Color Buttons: " };
        main.Add (colorButtonsLabel);

        View prev = colorButtonsLabel;

        foreach (KeyValuePair<string, ColorScheme> colorScheme in Colors.ColorSchemes)
        {
            var colorButton = new Button
            {
                X = Pos.Right (prev),
                Y = Pos.Y (colorButtonsLabel),
                Text = $"_{colorScheme.Key}",
                ColorScheme = colorScheme.Value,
            };
            DoMessage (colorButton, colorButton.Text);
            main.Add (colorButton);
            prev = colorButton;
        }

        Button button;

        main.Add (
                  button = new ()
                  {
                      X = 2,
                      Y = Pos.Bottom (colorButtonsLabel) + 1,
                      Text =
                          "A super l_öng Button that will probably expose a bug in clipping or wrapping of text. Will it?"
                  }
                 );
        DoMessage (button, button.Text);

        // Note the 'N' in 'Newline' will be the hotkey
        main.Add (
                  button = new () { X = 2, Y = Pos.Bottom (button) + 1, Height = 2, Text = "a Newline\nin the button" }
                 );
        button.Accepting += (s, e) =>
                         {
                             MessageBox.Query ("Message", "Question?", "Yes", "No");
                             e.Cancel = true;
                         };

        var textChanger = new Button { X = 2, Y = Pos.Bottom (button) + 1, Text = "Te_xt Changer" };
        main.Add (textChanger);
        textChanger.Accepting += (s, e) =>
                              {
                                  textChanger.Text += "!";
                                  e.Cancel = true;
                              };

        main.Add (
                  button = new ()
                  {
                      X = Pos.Right (textChanger) + 2,
                      Y = Pos.Y (textChanger),
                      Text = "Lets see if this will move as \"Text Changer\" grows"
                  }
                 );
        button.Accepting += (sender, args) => { args.Cancel = true; };

        var removeButton = new Button
        {
            X = 2, Y = Pos.Bottom (button) + 1,
            ColorScheme = Colors.ColorSchemes ["Error"], Text = "Remove this button"
        };
        main.Add (removeButton);

        // This in interesting test case because `moveBtn` and below are laid out relative to this one!
        removeButton.Accepting += (s, e) =>
                               {
                                   removeButton.Visible = false;
                                   e.Cancel = true;
                               };

        var computedFrame = new FrameView
        {
            X = 0,
            Y = Pos.Bottom (removeButton) + 1,
            Width = Dim.Percent (50),
            Height = 6,
            Title = "Computed Layout"
        };
        main.Add (computedFrame);

        // Demonstrates how changing the View.Frame property can move Views
        var moveBtn = new Button
        {
            X = 0,
            Y = Pos.Center () - 1,
            Width = 30,
            ColorScheme = Colors.ColorSchemes ["Error"],
            Text = "Move This \u263b Button v_ia Pos"
        };

        moveBtn.Accepting += (s, e) =>
                          {
                              moveBtn.X = moveBtn.Frame.X + 5;
                              e.Cancel = true;
                          };
        computedFrame.Add (moveBtn);

        // Demonstrates how changing the View.Frame property can SIZE Views (#583)
        var sizeBtn = new Button
        {
            Y = Pos.Center () + 1,
            X = 0,
            Width = 30,
            Text = "Grow This \u263a Button _via Pos",
            ColorScheme = Colors.ColorSchemes ["Error"],
        };

        sizeBtn.Accepting += (s, e) =>
                          {
                              sizeBtn.Width = sizeBtn.Frame.Width + 5;
                              e.Cancel = true;
                          };
        computedFrame.Add (sizeBtn);

        var absoluteFrame = new FrameView
        {
            X = Pos.Right (computedFrame),
            Y = Pos.Bottom (removeButton) + 1,
            Width = Dim.Fill (),
            Height = 6,
            Title = "Absolute Layout"
        };
        main.Add (absoluteFrame);

        // Demonstrates how changing the View.Frame property can move Views
        var moveBtnA = new Button { ColorScheme = Colors.ColorSchemes ["Error"], Text = "Move This Button via Frame" };

        moveBtnA.Accepting += (s, e) =>
                           {
                               moveBtnA.Frame = new (
                                                     moveBtnA.Frame.X + 5,
                                                     moveBtnA.Frame.Y,
                                                     moveBtnA.Frame.Width,
                                                     moveBtnA.Frame.Height
                                                    );
                               e.Cancel = true;
                           };
        absoluteFrame.Add (moveBtnA);

        // Demonstrates how changing the View.Frame property can SIZE Views (#583)
        var sizeBtnA = new Button
        {
            Y = 2, ColorScheme = Colors.ColorSchemes ["Error"], Text = " ~  s  gui.cs   master ↑_10 = Сохранить"
        };

        sizeBtnA.Accepting += (s, e) =>
                           {
                               sizeBtnA.Frame = new (
                                                     sizeBtnA.Frame.X,
                                                     sizeBtnA.Frame.Y,
                                                     sizeBtnA.Frame.Width + 5,
                                                     sizeBtnA.Frame.Height
                                                    );
                               e.Cancel = true;
                           };
        absoluteFrame.Add (sizeBtnA);

        var label = new Label
        {
            X = 2, Y = Pos.Bottom (computedFrame) + 1,
            Text = "Text Ali_gnment (changes the four buttons above): "
        };
        main.Add (label);

        var radioGroup = new RadioGroup
        {
            X = 4,
            Y = Pos.Bottom (label) + 1,
            SelectedItem = 2,
            RadioLabels = new [] { "_Start", "_End", "_Center", "_Fill" },
            Title = "_9 RadioGroup",
            BorderStyle = LineStyle.Dotted,
            // CanFocus = false
        };
        main.Add (radioGroup);

        // Demo changing hotkey
        string MoveHotkey (string txt)
        {
            // Remove the '_'
            List<Rune> runes = txt.ToRuneList ();

            int i = runes.IndexOf ((Rune)'_');
            var start = "";

            if (i > -1)
            {
                start = StringExtensions.ToString (runes.GetRange (0, i));
            }

            txt = start + StringExtensions.ToString (runes.GetRange (i + 1, runes.Count - (i + 1)));

            runes = txt.ToRuneList ();

            // Move over one or go to start
            i++;

            if (i >= runes.Count)
            {
                i = 0;
            }

            // Slip in the '_'
            start = StringExtensions.ToString (runes.GetRange (0, i));

            return start + '_' + StringExtensions.ToString (runes.GetRange (i, runes.Count - i));
        }

        var mhkb = "Click to Change th_is Button's Hotkey";

        var moveHotKeyBtn = new Button
        {
            X = 2,
            Y = Pos.Bottom (radioGroup) + 1,
            Width = Dim.Width (computedFrame) - 2,
            ColorScheme = Colors.ColorSchemes ["TopLevel"],
            Text = mhkb
        };
        moveHotKeyBtn.Accepting += (s, e) =>
                                {
                                    moveHotKeyBtn.Text = MoveHotkey (moveHotKeyBtn.Text);
                                    e.Cancel = true;
                                };
        main.Add (moveHotKeyBtn);

        var muhkb = " ~  s  gui.cs   master ↑10 = Сохранить";

        var moveUnicodeHotKeyBtn = new Button
        {
            X = Pos.Left (absoluteFrame) + 1,
            Y = Pos.Bottom (radioGroup) + 1,
            Width = Dim.Width (absoluteFrame) - 2,
            ColorScheme = Colors.ColorSchemes ["TopLevel"],
            Text = muhkb
        };
        moveUnicodeHotKeyBtn.Accepting += (s, e) =>
                                       {
                                           moveUnicodeHotKeyBtn.Text = MoveHotkey (moveUnicodeHotKeyBtn.Text);
                                           e.Cancel = true;
                                       };
        main.Add (moveUnicodeHotKeyBtn);

        radioGroup.SelectedItemChanged += (s, args) =>
                                          {
                                              switch (args.SelectedItem)
                                              {
                                                  case 0:
                                                      moveBtn.TextAlignment = Alignment.Start;
                                                      sizeBtn.TextAlignment = Alignment.Start;
                                                      moveBtnA.TextAlignment = Alignment.Start;
                                                      sizeBtnA.TextAlignment = Alignment.Start;
                                                      moveHotKeyBtn.TextAlignment = Alignment.Start;
                                                      moveUnicodeHotKeyBtn.TextAlignment = Alignment.Start;

                                                      break;
                                                  case 1:
                                                      moveBtn.TextAlignment = Alignment.End;
                                                      sizeBtn.TextAlignment = Alignment.End;
                                                      moveBtnA.TextAlignment = Alignment.End;
                                                      sizeBtnA.TextAlignment = Alignment.End;
                                                      moveHotKeyBtn.TextAlignment = Alignment.End;
                                                      moveUnicodeHotKeyBtn.TextAlignment = Alignment.End;

                                                      break;
                                                  case 2:
                                                      moveBtn.TextAlignment = Alignment.Center;
                                                      sizeBtn.TextAlignment = Alignment.Center;
                                                      moveBtnA.TextAlignment = Alignment.Center;
                                                      sizeBtnA.TextAlignment = Alignment.Center;
                                                      moveHotKeyBtn.TextAlignment = Alignment.Center;
                                                      moveUnicodeHotKeyBtn.TextAlignment = Alignment.Center;

                                                      break;
                                                  case 3:
                                                      moveBtn.TextAlignment = Alignment.Fill;
                                                      sizeBtn.TextAlignment = Alignment.Fill;
                                                      moveBtnA.TextAlignment = Alignment.Fill;
                                                      sizeBtnA.TextAlignment = Alignment.Fill;
                                                      moveHotKeyBtn.TextAlignment = Alignment.Fill;
                                                      moveUnicodeHotKeyBtn.TextAlignment = Alignment.Fill;

                                                      break;
                                              }
                                          };

        label = new ()
        {
            X = 0,
            Y = Pos.Bottom (moveUnicodeHotKeyBtn) + 1,
            Title = "_Numeric Up/Down (press-and-hold):",
        };

        var numericUpDown = new NumericUpDown<int>
        {
            Value = 69,
            X = Pos.Right (label) + 1,
            Y = Pos.Top (label),
        };
        numericUpDown.ValueChanged += NumericUpDown_ValueChanged;

        void NumericUpDown_ValueChanged (object sender, EventArgs<int> e) { }

        main.Add (label, numericUpDown);

        label = new ()
        {
            X = 0,
            Y = Pos.Bottom (numericUpDown) + 1,
            Title = "_No Repeat:"
        };
        var noRepeatAcceptCount = 0;

        var noRepeatButton = new Button
        {
            X = Pos.Right (label) + 1,
            Y = Pos.Top (label),
            Title = $"Accept Cou_nt: {noRepeatAcceptCount}",
            WantContinuousButtonPressed = false
        };
        noRepeatButton.Accepting += (s, e) =>
                                 {
                                     noRepeatButton.Title = $"Accept Cou_nt: {++noRepeatAcceptCount}";
                                     e.Cancel = true;
                                 };
        main.Add (label, noRepeatButton);

        label = new ()
        {
            X = 0,
            Y = Pos.Bottom (label) + 1,
            Title = "_Repeat (press-and-hold):"
        };
        var acceptCount = 0;

        var repeatButton = new Button
        {
            X = Pos.Right (label) + 1,
            Y = Pos.Top (label),
            Title = $"Accept Co_unt: {acceptCount}",
            WantContinuousButtonPressed = true
        };
        repeatButton.Accepting += (s, e) =>
                               {
                                   repeatButton.Title = $"Accept Co_unt: {++acceptCount}";
                                   e.Cancel = true;
                               };

        var enableCB = new CheckBox
        {
            X = Pos.Right (repeatButton) + 1,
            Y = Pos.Top (repeatButton),
            Title = "Enabled",
            CheckedState = CheckState.Checked
        };
        enableCB.CheckedStateChanging += (s, e) => { repeatButton.Enabled = !repeatButton.Enabled; };
        main.Add (label, repeatButton, enableCB);

        var decNumericUpDown = new NumericUpDown<int>
        {
            Value = 911,
            Increment = 1,
            Format = "{0:X}",
            X = 0,
            Y = Pos.Bottom (enableCB) + 1,
        };

        main.Add (decNumericUpDown);

        Application.Run (main);
        main.Dispose ();
        Application.Shutdown ();
    }
}