From fa9613252822d27368c70670fc41d0cac27b1139 Mon Sep 17 00:00:00 2001
From: Odotocodot <48138990+Odotocodot@users.noreply.github.com>
Date: Mon, 3 Jul 2023 22:42:41 +0100
Subject: [PATCH 1/4] Add Plugin API -> VisibiltyChangedEventHandler

---
 Flow.Launcher.Plugin/Interfaces/IPublicAPI.cs |  7 ++++++-
 .../VisibilityChangedEventHandler.cs          | 21 +++++++++++++++++++
 Flow.Launcher/PublicAPIInstance.cs            |  2 ++
 Flow.Launcher/ViewModel/MainViewModel.cs      |  4 ++++
 4 files changed, 33 insertions(+), 1 deletion(-)
 create mode 100644 Flow.Launcher.Plugin/VisibilityChangedEventHandler.cs

diff --git a/Flow.Launcher.Plugin/Interfaces/IPublicAPI.cs b/Flow.Launcher.Plugin/Interfaces/IPublicAPI.cs
index 9b9a9525d5c..40ef5e91ae9 100644
--- a/Flow.Launcher.Plugin/Interfaces/IPublicAPI.cs
+++ b/Flow.Launcher.Plugin/Interfaces/IPublicAPI.cs
@@ -96,7 +96,12 @@ public interface IPublicAPI
         /// </summary>
         /// <returns></returns>
         bool IsMainWindowVisible();
-        
+
+        /// <summary>
+        /// Invoked when the visibility of the main window has changed
+        /// </summary>
+        event VisibilityChangedEventHandler VisibilityChanged;
+
         /// <summary>
         /// Show message box
         /// </summary>
diff --git a/Flow.Launcher.Plugin/VisibilityChangedEventHandler.cs b/Flow.Launcher.Plugin/VisibilityChangedEventHandler.cs
new file mode 100644
index 00000000000..21c8ee53e7a
--- /dev/null
+++ b/Flow.Launcher.Plugin/VisibilityChangedEventHandler.cs
@@ -0,0 +1,21 @@
+using System;
+
+namespace Flow.Launcher.Plugin
+{
+    /// <summary>
+    /// A delegate for when the visibility is changed
+    /// </summary>
+    /// <param name="sender"></param>
+    /// <param name="args"></param>
+    public delegate void VisibilityChangedEventHandler(object sender, VisibilityChangedEventArgs args);
+    /// <summary>
+    /// The event args for <see cref="VisibilityChangedEventHandler"/>
+    /// </summary>
+    public class VisibilityChangedEventArgs : EventArgs
+    {
+        /// <summary>
+        /// <see langword="true"/> if the main window has become visible
+        /// </summary>
+        public bool IsVisible { get; init; }
+    }
+}
diff --git a/Flow.Launcher/PublicAPIInstance.cs b/Flow.Launcher/PublicAPIInstance.cs
index 4312df3c386..def54e04bc9 100644
--- a/Flow.Launcher/PublicAPIInstance.cs
+++ b/Flow.Launcher/PublicAPIInstance.cs
@@ -75,6 +75,8 @@ public void RestartApp()
 
         public bool IsMainWindowVisible() => _mainVM.MainWindowVisibilityStatus;
 
+        public event VisibilityChangedEventHandler VisibilityChanged { add => _mainVM.VisibilityChanged += value; remove => _mainVM.VisibilityChanged -= value; }
+
         public void CheckForNewUpdate() => _settingsVM.UpdateApp();
 
         public void SaveAppAllSettings()
diff --git a/Flow.Launcher/ViewModel/MainViewModel.cs b/Flow.Launcher/ViewModel/MainViewModel.cs
index 0110a11d775..c832c258d28 100644
--- a/Flow.Launcher/ViewModel/MainViewModel.cs
+++ b/Flow.Launcher/ViewModel/MainViewModel.cs
@@ -578,6 +578,8 @@ private ResultsViewModel SelectedResults
         // because it is more accurate and reliable representation than using Visibility as a condition check
         public bool MainWindowVisibilityStatus { get; set; } = true;
 
+        public event VisibilityChangedEventHandler VisibilityChanged;
+
         public Visibility SearchIconVisibility { get; set; }
 
         public double MainWindowWidth
@@ -1014,6 +1016,7 @@ public void Show()
                 MainWindowOpacity = 1;
 
                 MainWindowVisibilityStatus = true;
+                VisibilityChanged?.Invoke(this, new VisibilityChangedEventArgs { IsVisible = true });
             });
         }
 
@@ -1048,6 +1051,7 @@ public async void Hide()
 
             MainWindowVisibilityStatus = false;
             MainWindowVisibility = Visibility.Collapsed;
+            VisibilityChanged?.Invoke(this, new VisibilityChangedEventArgs { IsVisible = false });
         }
 
         /// <summary>

From 7f43d854017c6e664a8cf74bf90a18f81b35bf4d Mon Sep 17 00:00:00 2001
From: Odotocodot <48138990+Odotocodot@users.noreply.github.com>
Date: Sun, 9 Jul 2023 14:07:54 +0100
Subject: [PATCH 2/4] Update Flow.Launcher.Plugin/Interfaces/IPublicAPI.cs

Co-authored-by: Jeremy Wu <jeremy24wu@gmail.com>
---
 Flow.Launcher.Plugin/Interfaces/IPublicAPI.cs | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/Flow.Launcher.Plugin/Interfaces/IPublicAPI.cs b/Flow.Launcher.Plugin/Interfaces/IPublicAPI.cs
index 40ef5e91ae9..474ad6f0a5d 100644
--- a/Flow.Launcher.Plugin/Interfaces/IPublicAPI.cs
+++ b/Flow.Launcher.Plugin/Interfaces/IPublicAPI.cs
@@ -98,7 +98,7 @@ public interface IPublicAPI
         bool IsMainWindowVisible();
 
         /// <summary>
-        /// Invoked when the visibility of the main window has changed
+        /// Invoked when the visibility of the main window has changed. Currently, the plugin will continue to be subscribed even if it is turned off. 
         /// </summary>
         event VisibilityChangedEventHandler VisibilityChanged;
 

From 088818bb32812f0308cf80c32a00bbb160974542 Mon Sep 17 00:00:00 2001
From: Odotocodot <48138990+Odotocodot@users.noreply.github.com>
Date: Sun, 9 Jul 2023 15:54:32 +0100
Subject: [PATCH 3/4] Move delegate into EventHandler.cs

#2216
---
 Flow.Launcher.Plugin/EventHandler.cs          | 18 ++++++++++++++++
 .../VisibilityChangedEventHandler.cs          | 21 -------------------
 2 files changed, 18 insertions(+), 21 deletions(-)
 delete mode 100644 Flow.Launcher.Plugin/VisibilityChangedEventHandler.cs

diff --git a/Flow.Launcher.Plugin/EventHandler.cs b/Flow.Launcher.Plugin/EventHandler.cs
index 009e1721c42..78e4bd4ed81 100644
--- a/Flow.Launcher.Plugin/EventHandler.cs
+++ b/Flow.Launcher.Plugin/EventHandler.cs
@@ -32,6 +32,24 @@ namespace Flow.Launcher.Plugin
     /// <returns>return true to continue handling, return false to intercept system handling</returns>
     public delegate bool FlowLauncherGlobalKeyboardEventHandler(int keyevent, int vkcode, SpecialKeyState state);
 
+    /// <summary>
+    /// A delegate for when the visibility is changed
+    /// </summary>
+    /// <param name="sender"></param>
+    /// <param name="args"></param>
+    public delegate void VisibilityChangedEventHandler(object sender, VisibilityChangedEventArgs args);
+    
+    /// <summary>
+    /// The event args for <see cref="VisibilityChangedEventHandler"/>
+    /// </summary>
+    public class VisibilityChangedEventArgs : EventArgs
+    {
+        /// <summary>
+        /// <see langword="true"/> if the main window has become visible
+        /// </summary>
+        public bool IsVisible { get; init; }
+    }
+
     /// <summary>
     /// Arguments container for the Key Down event
     /// </summary>
diff --git a/Flow.Launcher.Plugin/VisibilityChangedEventHandler.cs b/Flow.Launcher.Plugin/VisibilityChangedEventHandler.cs
deleted file mode 100644
index 21c8ee53e7a..00000000000
--- a/Flow.Launcher.Plugin/VisibilityChangedEventHandler.cs
+++ /dev/null
@@ -1,21 +0,0 @@
-using System;
-
-namespace Flow.Launcher.Plugin
-{
-    /// <summary>
-    /// A delegate for when the visibility is changed
-    /// </summary>
-    /// <param name="sender"></param>
-    /// <param name="args"></param>
-    public delegate void VisibilityChangedEventHandler(object sender, VisibilityChangedEventArgs args);
-    /// <summary>
-    /// The event args for <see cref="VisibilityChangedEventHandler"/>
-    /// </summary>
-    public class VisibilityChangedEventArgs : EventArgs
-    {
-        /// <summary>
-        /// <see langword="true"/> if the main window has become visible
-        /// </summary>
-        public bool IsVisible { get; init; }
-    }
-}

From 4eb20e242f3e415b45ef9b0fdbccbe69d5e81a57 Mon Sep 17 00:00:00 2001
From: Ioannis G <jtgftw@gmail.com>
Date: Sun, 9 Jul 2023 19:32:29 +0300
Subject: [PATCH 4/4] fix build issue introduced in 088818bb

---
 Flow.Launcher.Plugin/EventHandler.cs | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/Flow.Launcher.Plugin/EventHandler.cs b/Flow.Launcher.Plugin/EventHandler.cs
index 78e4bd4ed81..893b0ba8047 100644
--- a/Flow.Launcher.Plugin/EventHandler.cs
+++ b/Flow.Launcher.Plugin/EventHandler.cs
@@ -1,4 +1,5 @@
-using System.Windows;
+using System;
+using System.Windows;
 using System.Windows.Input;
 
 namespace Flow.Launcher.Plugin