Merge pull request #2568 from cwensley/curtis/themed-message-box

Add ThemedMessageBoxHandler

src/Eto/Forms/ThemedControls/ThemedMessageBoxHandler.cs

@@ -0,0 +1,166 @@
+using System;
+using System.Collections.Generic;
+using System.Text;
+
+namespace Eto.Forms.ThemedControls
+{
+	/// <summary>
+	/// A themed message box handler to allow more customization and theming
+	/// </summary>
+	public class ThemedMessageBoxHandler : WidgetHandler<Widget>, MessageBox.IHandler
+	{
+		/// <inheritdoc />
+		public string Text { get; set; }
+		/// <inheritdoc />
+		public string Caption { get; set; }
+		/// <inheritdoc />
+		public MessageBoxType Type { get; set; }
+		/// <inheritdoc />
+		public MessageBoxButtons Buttons { get; set; }
+		/// <inheritdoc />
+		public MessageBoxDefaultButton DefaultButton { get; set; }
+
+		/// <inheritdoc />
+		public DialogResult ShowDialog(Control parent)
+		{
+			var dlg = new ThemedMessageBox();
+			dlg.Title = Caption;
+			dlg.Text = Text;
+			// todo: add ability to get icons needed from SystemIcons
+			//dlg.Image = GetImage();
+
+			var app = Application.Instance;
+			switch (Buttons)
+			{
+				case MessageBoxButtons.OK:
+					dlg.AddButton(app.Localize(Widget, "OK"), DialogResult.Ok, DefaultButton == MessageBoxDefaultButton.OK);
+					break;
+				case MessageBoxButtons.OKCancel:
+					dlg.AddButton(app.Localize(Widget, "OK"), DialogResult.Ok, DefaultButton == MessageBoxDefaultButton.OK);
+					dlg.AddButton(app.Localize(Widget, "Cancel"), DialogResult.Cancel, DefaultButton == MessageBoxDefaultButton.Cancel, true);
+					break;
+				case MessageBoxButtons.YesNo:
+					dlg.AddButton(app.Localize(Widget, "&Yes"), DialogResult.Yes, DefaultButton == MessageBoxDefaultButton.Yes);
+					dlg.AddButton(app.Localize(Widget, "&No"), DialogResult.No, DefaultButton == MessageBoxDefaultButton.No);
+					break;
+				case MessageBoxButtons.YesNoCancel:
+					dlg.AddButton(app.Localize(Widget, "Cancel"), DialogResult.Cancel, DefaultButton == MessageBoxDefaultButton.Cancel, true);
+					dlg.AddButton(app.Localize(Widget, "&No"), DialogResult.No, DefaultButton == MessageBoxDefaultButton.No);
+					dlg.AddButton(app.Localize(Widget, "&Yes"), DialogResult.Yes, DefaultButton == MessageBoxDefaultButton.Yes);
+					break;
+			}
+
+			dlg.ShowModal(parent);
+
+			return dlg.Result as DialogResult? ?? DialogResult.Cancel;
+		}
+	}
+
+
+	/// <summary>
+	/// Message box implementation 
+	/// </summary>
+	public class ThemedMessageBox : Dialog
+	{
+		readonly Label textLabel = new Label();
+		readonly ImageView image = new ImageView();
+
+
+		/// <summary>
+		/// Gets or sets the result of the dialog
+		/// </summary>
+		public object Result { get; set; }
+
+		/// <summary>
+		/// Initializes a new instance of the ThemedMessageBox class
+		/// </summary>
+		public ThemedMessageBox()
+		{
+			Closeable = false;
+			ShowInTaskbar = false;
+			Resizable = false;
+
+			var layout = new DynamicLayout();
+			layout.Padding = new Padding(22, 28);
+			layout.DefaultSpacing = new Size(8, 8);
+
+			layout.AddRow(TableLayout.AutoSized(image, centered: true), textLabel);
+
+			Content = layout;
+
+			HandleEvent(KeyDownEvent);
+		}
+
+		/// <inheritdoc/>
+		protected override void OnKeyDown(KeyEventArgs e)
+		{
+			base.OnKeyDown(e);
+
+			if (e.KeyData == (Application.Instance.CommonModifier | Keys.C))
+			{
+				var clipboard = new Clipboard();
+				var divider = "---------------------------\n";
+				var buttons = string.Join("   ", NegativeButtons.Concat(PositiveButtons).Select(r => r.Text.Replace("&", "")));
+				clipboard.Text = $"{divider}{Title}\n{divider}{Text}\n{divider}{buttons}\n{divider}";
+				e.Handled = true;
+			}
+		}
+
+		/// <summary>
+		/// Adds a button to the message box
+		/// </summary>
+		/// <param name="text"></param>
+		/// <param name="result"></param>
+		/// <param name="isDefault"></param>
+		/// <param name="isAbort"></param>
+		public void AddButton(string text, object result, bool isDefault = false, bool isAbort = false)
+		{
+			var button = new Button { Text = text };
+			button.Click += (sender, e) =>
+			{
+				Result = result;
+				Close();
+			};
+			PositiveButtons.Add(button);
+
+			if (isDefault)
+			{
+				DefaultButton = button;
+				button.Focus();
+			}
+			if (isAbort)
+			{
+				AbortButton = button;
+				Closeable = true;
+				Result = result;
+			}
+		}
+
+		/// <summary>
+		/// Gets or sets the text of the message box
+		/// </summary>
+		public string Text
+		{
+			get => textLabel.Text;
+			set => textLabel.Text = value;
+		}
+
+		/// <summary>
+		/// Gets or sets the alignment of the text
+		/// </summary>
+		public TextAlignment TextAlignment
+		{
+			get => textLabel.TextAlignment;
+			set => textLabel.TextAlignment = value;
+		}
+
+		/// <summary>
+		/// Gets or sets the image to show
+		/// </summary>
+		public Image Image
+		{
+			get => image.Image;
+			set => image.Image = value;
+		}
+	}
+}