From 508d7e149287b1eecb9040fd1b6237b844011326 Mon Sep 17 00:00:00 2001
From: EVEJay <me@just-me.really>
Date: Fri, 14 Jun 2024 13:51:17 +0200
Subject: [PATCH] Added click trough toggle to the overlay.

---
 SMT/MainWindow.xaml    |  1 +
 SMT/MainWindow.xaml.cs | 21 +++++++++++++++-
 SMT/Overlay.xaml       |  2 +-
 SMT/Overlay.xaml.cs    | 55 +++++++++++++++++++++++++++++++++++++++++-
 SMT/SMT.csproj         |  3 +++
 5 files changed, 79 insertions(+), 3 deletions(-)

diff --git a/SMT/MainWindow.xaml b/SMT/MainWindow.xaml
index 86f1dcc..98e9954 100644
--- a/SMT/MainWindow.xaml
+++ b/SMT/MainWindow.xaml
@@ -66,6 +66,7 @@
                 <MenuItem Header="View" Height="Auto">
                     <MenuItem x:Name="miFullScreenToggle" Header="FullScreen" IsCheckable="True" IsChecked="False" Click="FullScreenToggle_MenuItem_Click" />
                     <MenuItem x:Name="miResetLayout" Header="Reset Layout" Click="miResetLayout_Click" />
+                    <MenuItem x:Name="miToggleOverlayClickTrough" Header="Toggle Overlay ClickTrough (Shift + Ctrl + Alt + T)" Click="OverlayClickTroughToggle_MenuItem_Click"/>
                 </MenuItem>
             </Menu>
 
diff --git a/SMT/MainWindow.xaml.cs b/SMT/MainWindow.xaml.cs
index 999a9d9..3d139b0 100644
--- a/SMT/MainWindow.xaml.cs
+++ b/SMT/MainWindow.xaml.cs
@@ -30,7 +30,12 @@ public partial class MainWindow : Window
     {
         public static MainWindow AppWindow;
         private LogonWindow logonBrowserWindow;
-        private List<Overlay> overlayWindows;
+        private List<Overlay> overlayWindows = new();
+        private bool overlayWindowsAreClickTrough = false;
+        public bool OverlayWindowsAreClickTrough
+        {
+            get => overlayWindowsAreClickTrough; 
+        }
 
         private MediaPlayer mediaPlayer;
         private PreferencesWindow preferencesWindow;
@@ -2498,6 +2503,20 @@ private void OverlayWindow_MenuItem_Click(object sender, RoutedEventArgs e)
             overlayWindows.Add(newOverlayWindow);
         }
 
+        private void OverlayClickTroughToggle_MenuItem_Click(object sender, RoutedEventArgs e)
+        {
+            OverlayWindow_ToggleClickTrough();
+        }
+        
+        public void OverlayWindow_ToggleClickTrough()
+        {
+            overlayWindowsAreClickTrough = !overlayWindowsAreClickTrough;
+            foreach (Overlay overlayWindow in overlayWindows)
+            {
+                overlayWindow.ToggleClickTrough(overlayWindowsAreClickTrough);
+            }
+        }
+
         public void OnOverlayWindowClosing(object sender, CancelEventArgs e)
         {
             overlayWindows.Remove((Overlay)sender);
diff --git a/SMT/Overlay.xaml b/SMT/Overlay.xaml
index 510ed4a..8b9b735 100644
--- a/SMT/Overlay.xaml
+++ b/SMT/Overlay.xaml
@@ -26,7 +26,7 @@
             <ColumnDefinition Width="20px" />
         </Grid.ColumnDefinitions>
         <Grid.RowDefinitions>
-            <RowDefinition Height="20" />
+            <RowDefinition Height="20" Name="overlay_ButtonRow"/>
             <RowDefinition Height="*" />
         </Grid.RowDefinitions>
         <TextBlock Grid.Column="1" Grid.Row="0" Grid.RowSpan="2"  Background="Transparent" Name="overlay_CharNameTextblock" HorizontalAlignment="Center" TextAlignment="Center" FontSize="10" Opacity="0.5" Margin="1" Foreground="White" Text="No char selected" />
diff --git a/SMT/Overlay.xaml.cs b/SMT/Overlay.xaml.cs
index eaf8d42..2acec2d 100644
--- a/SMT/Overlay.xaml.cs
+++ b/SMT/Overlay.xaml.cs
@@ -1,4 +1,5 @@
-using System;
+using NHotkey.Wpf;
+using System;
 using System.Collections.Generic;
 using System.ComponentModel;
 using System.Linq;
@@ -16,9 +17,34 @@
 using System.Windows.Shapes;
 using Windows.Services;
 using Microsoft.IdentityModel.Tokens;
+using NHotkey;
 using SMT.EVEData;
 using static SMT.EVEData.Navigation;
 
+public static class WindowsServices
+{
+  const int WS_EX_TRANSPARENT = 0x00000020;
+  const int GWL_EXSTYLE = (-20);
+
+  [DllImport("user32.dll")]
+  static extern int GetWindowLong(IntPtr hwnd, int index);
+
+  [DllImport("user32.dll")]
+  static extern int SetWindowLong(IntPtr hwnd, int index, int newStyle);
+
+  public static void SetWindowExTransparent(IntPtr hwnd)
+  {
+      var extendedStyle = GetWindowLong(hwnd, GWL_EXSTYLE);
+    SetWindowLong(hwnd, GWL_EXSTYLE, extendedStyle | WS_EX_TRANSPARENT);
+  }
+  
+  public static void SetWindowExNotTransparent(IntPtr hwnd)
+  {
+      var extendedStyle = GetWindowLong(hwnd, GWL_EXSTYLE);
+      SetWindowLong(hwnd, GWL_EXSTYLE, extendedStyle & ~WS_EX_TRANSPARENT);
+  }
+}
+
 namespace SMT
 {
     /// <summary>
@@ -377,6 +403,9 @@ public Overlay(MainWindow mw)
             Closing += Overlay_Closing;
             // We can only redraw stuff when the canvas is actually resized, otherwise dimensions will be wrong!
             overlay_Canvas.SizeChanged += OnCanvasSizeChanged;
+            
+            // Set up hotkeys
+            HotkeyManager.Current.AddOrReplace("Toggle click trough overlay windows.", Key.T, ModifierKeys.Alt | ModifierKeys.Control | ModifierKeys.Shift, OnClickTroughToggle);
 
             // Update settings
             intelUrgentPeriod = mainWindow.MapConf.IntelFreshTime;
@@ -403,11 +432,35 @@ public Overlay(MainWindow mw)
             // mw.EVEManager.IntelAddedEvent += OnIntelAdded;
 
             // Start the magic
+            ToggleClickTrough(mainWindow.OverlayWindowsAreClickTrough);
             RefreshCurrentView();
             _ = CharacterLocationUpdateLoop();
             _ = DataOverlayUpdateLoop();
         }
 
+        private void OnClickTroughToggle(object sender, HotkeyEventArgs e)
+        {
+            mainWindow.OverlayWindow_ToggleClickTrough();
+        }
+
+        public void ToggleClickTrough(bool isClickTrough)
+        {
+            var hwnd = new WindowInteropHelper(this).Handle;
+            
+            if (isClickTrough)
+            {
+                WindowsServices.SetWindowExTransparent(hwnd);
+                overlay_ButtonRow.Height = new GridLength(0);
+                this.ResizeMode = ResizeMode.NoResize;
+            }
+            else
+            {
+                WindowsServices.SetWindowExNotTransparent(hwnd);
+                overlay_ButtonRow.Height = new GridLength(20);
+                this.ResizeMode = ResizeMode.CanResizeWithGrip;
+            }
+        }
+
         protected override void OnSourceInitialized(EventArgs e)
         {
             base.OnInitialized(e);
diff --git a/SMT/SMT.csproj b/SMT/SMT.csproj
index 7a4f6c4..4901026 100644
--- a/SMT/SMT.csproj
+++ b/SMT/SMT.csproj
@@ -193,6 +193,9 @@
       <Version>7.1.3</Version>
     </PackageReference>
     <PackageReference Include="Newtonsoft.Json" Version="13.0.3" />
+    <PackageReference Include="NHotkey.Wpf">
+      <Version>3.0.0</Version>
+    </PackageReference>
     <PackageReference Include="WPFThemes.DarkBlend">
       <Version>1.0.8</Version>
     </PackageReference>