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+using System.Collections.Generic;
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+using System;
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+using Terminal.Gui;
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+using System.Linq;
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+using System.Reflection.Emit;
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+
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+namespace UICatalog.Scenarios;
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+
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+[ScenarioMetadata ("PosJustification", "Shows off Pos.Justify")]
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+[ScenarioCategory ("Layout")]
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+public sealed class PosJustification : Scenario
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+{
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+
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+ private Justifier _horizJustifier = new Justifier ();
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+ private int _leftMargin = 0;
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+
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+ public override void Main ()
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+ {
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+ // Init
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+ Application.Init ();
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+
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+ // Setup - Create a top-level application window and configure it.
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+ Window appWindow = new ()
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+ {
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+ Title = $"{Application.QuitKey} to Quit - Scenario: {GetName ()} - {GetDescription ()}"
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+ };
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+
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+ SetupHorizontalControls (appWindow);
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+
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+ var checkbox = new CheckBox { X = 5, Y = Pos.Justify (_horizJustifier.Justification), Text = "Check boxes!" };
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+ checkbox.Accept += (s, e) => MessageBox.ErrorQuery ("Error", "You pressed the checkbox!", "Ok");
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+ appWindow.Add (checkbox);
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+
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+ checkbox = new CheckBox { X = 5, Y = Pos.Justify (_horizJustifier.Justification), Text = "CheckTwo" };
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+ checkbox.Accept += (s, e) => MessageBox.ErrorQuery ("Error", "You pressed Two!", "Ok");
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+ appWindow.Add (checkbox);
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+
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+ checkbox = new CheckBox { X = 5, Y = Pos.Justify (_horizJustifier.Justification), Text = "CheckThree" };
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+ checkbox.Accept += (s, e) => MessageBox.ErrorQuery ("Error", "You pressed Three!", "Ok");
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+ appWindow.Add (checkbox);
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+
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+ checkbox = new CheckBox { X = 5, Y = Pos.Justify (_horizJustifier.Justification), Text = "CheckFour" };
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+ checkbox.Accept += (s, e) => MessageBox.ErrorQuery ("Error", "You pressed Three!", "Ok");
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+ appWindow.Add (checkbox);
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+
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+ checkbox = new CheckBox { X = 5, Y = Pos.Justify (_horizJustifier.Justification), Text = "CheckFive" };
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+ checkbox.Accept += (s, e) => MessageBox.ErrorQuery ("Error", "You pressed Three!", "Ok");
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+ appWindow.Add (checkbox);
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+
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+ checkbox = new CheckBox { X = 5, Y = Pos.Justify (_horizJustifier.Justification), Text = "CheckSix" };
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+ checkbox.Accept += (s, e) => MessageBox.ErrorQuery ("Error", "You pressed Three!", "Ok");
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+ appWindow.Add (checkbox);
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+
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+ checkbox = new CheckBox { X = 5, Y = Pos.Justify (_horizJustifier.Justification), Text = "CheckSeven" };
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+ checkbox.Accept += (s, e) => MessageBox.ErrorQuery ("Error", "You pressed Three!", "Ok");
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+ appWindow.Add (checkbox);
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+
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+ checkbox = new CheckBox { X = 5, Y = Pos.Justify (_horizJustifier.Justification), Text = "CheckEight" };
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+ checkbox.Accept += (s, e) => MessageBox.ErrorQuery ("Error", "You pressed Three!", "Ok");
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+ appWindow.Add (checkbox);
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+
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+ // Run - Start the application.
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+ Application.Run (appWindow);
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+ appWindow.Dispose ();
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+
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+ // Shutdown - Calling Application.Shutdown is required.
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+ Application.Shutdown ();
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+ }
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+
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+ private void SetupHorizontalControls (Window appWindow)
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+ {
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+ ColorScheme colorScheme = Colors.ColorSchemes ["Toplevel"];
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+ RadioGroup justification = new ()
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+ {
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+ X = Pos.Justify (_horizJustifier.Justification),
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+ Y = Pos.Center (),
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+ RadioLabels = GetUniqueEnumNames<Justification> ().ToArray (),
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+ ColorScheme = colorScheme
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+ };
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+
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+ justification.SelectedItemChanged += (s, e) =>
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+ {
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+ _horizJustifier.Justification = (Justification)Enum.Parse (typeof (Justification), justification.SelectedItem.ToString ());
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+ foreach (var view in appWindow.Subviews.Where (v => v.X is Pos.PosJustify))
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+ {
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+ if (view.X is Pos.PosJustify j)
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+ {
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+ var newJust = new Pos.PosJustify (_horizJustifier.Justification)
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+ {
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+ Justifier =
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+ {
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+ PutSpaceBetweenItems = _horizJustifier.PutSpaceBetweenItems
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+ }
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+ };
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+ view.X = newJust;
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+ }
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+ }
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+ };
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+ appWindow.Add (justification);
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+
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+ CheckBox putSpaces = new ()
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+ {
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+ X = Pos.Justify (_horizJustifier.Justification),
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+ Y = Pos.Top (justification),
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+ ColorScheme = colorScheme,
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+ Text = "Spaces",
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+ };
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+ putSpaces.Toggled += (s, e) =>
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+ {
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+ _horizJustifier.PutSpaceBetweenItems = e.NewValue is { } && e.NewValue.Value;
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+ foreach (var view in appWindow.Subviews.Where (v => v.X is Pos.PosJustify))
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+ {
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+ if (view != justification)
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+ {
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+ if (view.X is Pos.PosJustify j)
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+ {
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+ j.Justifier.PutSpaceBetweenItems = _horizJustifier.PutSpaceBetweenItems;
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+ }
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+
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+ }
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+ }
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+ };
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+ appWindow.Add (putSpaces);
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+
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+ CheckBox margin = new ()
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+ {
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+ X = Pos.Left (putSpaces),
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+ Y = Pos.Bottom(putSpaces),
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+ ColorScheme = colorScheme,
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+ Text = "Margin",
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+ };
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+ margin.Toggled += (s, e) =>
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+ {
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+ _leftMargin = e.NewValue is { } && e.NewValue.Value ? 1 : 0;
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+ foreach (var view in appWindow.Subviews.Where (v => v.X is Pos.PosJustify))
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+ {
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+ if (view != justification)
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+ {
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+ view.Margin.Thickness = new Thickness (_leftMargin, 0, 0, 0);
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+ }
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+ }
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+ };
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+ appWindow.Add (margin);
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+
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+ var addedViews = new List<Button> ();
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+ addedViews.Add (new Button
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+ {
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+ X = Pos.Justify (_horizJustifier.Justification),
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+ Y = Pos.Center (),
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+ Text = NumberToWords.Convert (0)
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+ });
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+
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+ var addedViewsUpDown = new Buttons.NumericUpDown<int> ()
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+ {
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+ X = Pos.Justify (_horizJustifier.Justification),
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+ Y = Pos.Top (justification),
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+ Height = 3,
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+ Width = 9,
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+ Title = "Added",
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+ ColorScheme = colorScheme,
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+ BorderStyle = LineStyle.None,
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+ Value = addedViews.Count
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+ };
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+ addedViewsUpDown.Border.Thickness = new Thickness (0, 1, 0, 0);
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+ addedViewsUpDown.ValueChanging += (s, e) =>
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+ {
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+ if (e.NewValue < 0)
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+ {
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+ e.Cancel = true;
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+
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+ return;
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+ }
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+
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+ // Add or remove buttons
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+ if (e.NewValue < e.OldValue)
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+ {
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+ // Remove buttons
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+ for (int i = e.OldValue - 1; i >= e.NewValue; i--)
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+ {
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+ var button = addedViews [i];
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+ appWindow.Remove (button);
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+ addedViews.RemoveAt (i);
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+ button.Dispose ();
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+ }
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+ }
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+
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+ if (e.NewValue > e.OldValue)
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+ {
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+ // Add buttons
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+ for (int i = e.OldValue; i < e.NewValue; i++)
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+ {
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+ var button = new Button
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+ {
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+ X = Pos.Justify (_horizJustifier.Justification),
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+ Y = Pos.Center (),
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+ Text = NumberToWords.Convert (i + 1)
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+ };
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+ appWindow.Add (button);
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+ addedViews.Add (button);
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+ }
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+ }
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+ };
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+ appWindow.Add (addedViewsUpDown);
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+
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+ appWindow.Add (addedViews [0]);
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+
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+ }
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+
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+ static IEnumerable<string> GetUniqueEnumNames<T> () where T : Enum
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+ {
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+ var values = new HashSet<int> ();
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+ foreach (var name in Enum.GetNames (typeof (T)))
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+ {
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+ var value = (int)Enum.Parse (typeof (T), name);
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+ if (values.Add (value))
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+ {
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+ yield return name;
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+ }
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+ }
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+ }
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+}
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Tig