#11 Double Draw: Trying to provide a clean way to force a resolution …

…change.
FrigoCoder · Jan 6, 2018 · ba9df5a · ba9df5a
1 parent 39363cc
commit ba9df5a
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Showing 2 changed files with 11 additions and 13 deletions.
diff --git a/FrigoTab/SessionForm.cs b/FrigoTab/SessionForm.cs
@@ -1,5 +1,7 @@
+using System;
 using System.Drawing;
 using System.Linq;
+using System.Runtime.InteropServices;
 using System.Threading;
 using System.Windows.Forms;
 
@@ -60,9 +62,6 @@ protected override void WndProc (ref Message m) {
                 case WindowMessages.MouseClicked:
                     MouseClicked(new Point((int) m.WParam, (int) m.LParam));
                     break;
-                case WindowMessages.DisplayChange:
-                    DisplayChange();
-                    break;
             }
             base.WndProc(ref m);
         }
@@ -77,7 +76,9 @@ private void BeginSession () {
                 return;
             }
 
-            ForceResolutionChange();
+            WindowHandle.GetForegroundWindow().PostMessage(WindowMessages.ActivateApp, 0, Thread.CurrentThread.ManagedThreadId);
+            ChangeDisplaySettings(IntPtr.Zero, 0);
+            Bounds = GetScreenBounds();
 
             backgrounds = new BackgroundWindows(this, finder);
             screenForms = new ScreenForms(this);
@@ -149,15 +150,13 @@ private void DisplayChange () {
             }
         }
 
-        private static void ForceResolutionChange () {
-            WindowHandle foreground = WindowHandle.GetForegroundWindowHandle();
-            foreground.PostMessage(WindowMessages.ActivateApp, 0, Thread.CurrentThread.ManagedThreadId);
-        }
-
         private static Rectangle GetScreenBounds () {
             return Screen.AllScreens.Select(screen => screen.Bounds).Aggregate(Rectangle.Union);
         }
 
+        [DllImport("user32.dll")]
+        private static extern int ChangeDisplaySettings (IntPtr lpDevMode, int dwFlags);
+
     }
 
 }
diff --git a/FrigoTab/WindowHandle.cs b/FrigoTab/WindowHandle.cs
@@ -30,10 +30,12 @@ public enum WindowExStyles : long {
     public struct WindowHandle {
 
         public static readonly WindowHandle Null = new WindowHandle(IntPtr.Zero);
-        public static WindowHandle GetForegroundWindowHandle () => GetForegroundWindow();
         public static bool operator == (WindowHandle h1, WindowHandle h2) => h1.handle == h2.handle;
         public static bool operator != (WindowHandle h1, WindowHandle h2) => h1.handle != h2.handle;
 
+        [DllImport("user32.dll")]
+        public static extern WindowHandle GetForegroundWindow ();
+
         private readonly IntPtr handle;
 
         public WindowHandle (IntPtr handle) {
@@ -150,9 +152,6 @@ private static extern bool SendMessageCallback (WindowHandle hWnd, WindowMessage
         [DllImport("user32.dll")]
         private static extern bool PostMessage (WindowHandle hWnd, WindowMessages msg, IntPtr wParam, IntPtr lParam);
 
-        [DllImport("user32.dll")]
-        private static extern WindowHandle GetForegroundWindow ();
-
         [DllImport("user32.dll")]
         private static extern bool GetWindowRect (WindowHandle hWnd, out Rect lpRect);