From 8a04ce0485b987c67ca8ca753fb088c7cd702d75 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=C4=B0evgen=20Baida?= <ievgen.baida@mendix.com>
Date: Tue, 16 Jan 2024 22:44:40 +0100
Subject: [PATCH] Add `HasUnsavedChanges` property to `DocumentPage`

---
 src/Eto/Forms/Controls/DocumentPage.cs         | 18 +++++++++++++++++-
 .../ThemedDocumentPageHandler.cs               | 16 ++++++++++++++++
 2 files changed, 33 insertions(+), 1 deletion(-)

diff --git a/src/Eto/Forms/Controls/DocumentPage.cs b/src/Eto/Forms/Controls/DocumentPage.cs
index b2699d228e..0408a7cf39 100644
--- a/src/Eto/Forms/Controls/DocumentPage.cs
+++ b/src/Eto/Forms/Controls/DocumentPage.cs
@@ -1,4 +1,4 @@
-namespace Eto.Forms;
+namespace Eto.Forms;
 
 /// <summary>
 /// Control for a page in a <see cref="DocumentControl"/>
@@ -77,6 +77,16 @@ public bool Closable
 		set { Handler.Closable = value; }
 	}
 
+	/// <summary>
+	/// Gets or sets a value indicating whether this <see cref="T:Eto.Forms.DocumentPage"/> has unsaved changes.
+	/// </summary>
+	/// <value><c>true</c> if page has unsaved changes; otherwise, <c>false</c>.</value>
+	public bool HasUnsavedChanges
+	{
+		get { return Handler.HasUnsavedChanges; }
+		set { Handler.HasUnsavedChanges = value; }
+	}
+
 	/// <summary>
 	/// Gets or sets the image of the page.
 	/// </summary>
@@ -113,6 +123,12 @@ public string Text
 		/// <value><c>true</c> if closable; otherwise, <c>false</c>.</value>
 		bool Closable { get; set; }
 
+		/// <summary>
+		/// Gets or sets a value indicating whether this <see cref="T:Eto.Forms.DocumentPage"/> has unsaved changes.
+		/// </summary>
+		/// <value><c>true</c> if page has unsaved changes; otherwise, <c>false</c>.</value>
+		bool HasUnsavedChanges { get; set; }
+
 		/// <summary>
 		/// Gets or sets the image of the page.
 		/// </summary>
diff --git a/src/Eto/Forms/ThemedControls/ThemedDocumentPageHandler.cs b/src/Eto/Forms/ThemedControls/ThemedDocumentPageHandler.cs
index 117986da26..73e2a6577f 100644
--- a/src/Eto/Forms/ThemedControls/ThemedDocumentPageHandler.cs
+++ b/src/Eto/Forms/ThemedControls/ThemedDocumentPageHandler.cs
@@ -9,6 +9,7 @@ public class ThemedDocumentPageHandler : ThemedContainerHandler<Panel, DocumentP
 	bool closable;
 	string text;
 	Image image;
+	bool hasUnsavedChanges;
 
 	/// <summary>
 	/// Initializes a new instance of the <see cref="T:Eto.Forms.ThemedControls.ThemedDocumentPageHandler"/> class.
@@ -105,6 +106,21 @@ public string Text
 		}
 	}
 
+
+	/// <summary>
+	/// Gets or sets a value indicating whether this <see cref="T:Eto.Forms.ThemedControls.ThemedDocumentPageHandler"/> has unsaved changes.
+	/// </summary>
+	/// <value><c>true</c> if page has unsaved changes; otherwise, <c>false</c>.</value>
+	public bool HasUnsavedChanges
+	{
+		get { return hasUnsavedChanges; }
+		set
+		{
+			hasUnsavedChanges = value;
+			Update();
+		}
+	}
+
 	/// <summary>
 	/// Gets a value indicating whether <see cref="Control.PreLoad"/>/<see cref="Control.Load"/>/<see cref="Control.LoadComplete"/>/<see cref="Control.UnLoad"/>
 	/// events are propagated to the inner control