Another attempt to sort out the dialog appearing behind other windows.

2019-08-23 19:16:02 +01:00
parent 5476331073
commit 036fd48bcf
3 changed files with 109 additions and 10 deletions
@@ -0,0 +1,106 @@
+using System;
+using System.Runtime.InteropServices;
+using System.Text;
+
+namespace ASCOM.Meade.net
+{
+    internal static class Win32Utilities
+    {
+        //Win32 API calls necesary to raise an unowned processs main window
+
+        [DllImport("user32.dll")]
+
+        private static extern bool SetForegroundWindow(IntPtr hWnd);
+
+        [DllImport("user32.dll")]
+        private static extern bool ShowWindowAsync(IntPtr hWnd, int nCmdShow);
+
+        [DllImport("user32.dll")]
+        private static extern bool IsIconic(IntPtr hWnd);
+
+        [DllImport("user32.dll", SetLastError = true)]
+        private static extern bool SystemParametersInfo(uint uiAction, uint uiParam, IntPtr pvParam, uint fWinIni);
+
+        [DllImport("user32.dll", SetLastError = true)]
+        private static extern uint GetWindowThreadProcessId(IntPtr hWnd, IntPtr lpdwProcessId);
+
+        [DllImport("user32.dll")]
+        private static extern IntPtr GetForegroundWindow();
+
+        [DllImport("user32.dll")]
+        private static extern bool AttachThreadInput(uint idAttach, uint idAttachTo, bool fAttach);
+
+        [DllImport("user32.dll")]
+        static extern bool BringWindowToTop(IntPtr hWnd);
+
+        [DllImport("user32.dll")]
+        private static extern int GetWindowText(IntPtr hWnd, StringBuilder lpString, Int32 nMaxCount);
+
+        [DllImport("user32.dll")]
+        private static extern int GetWindowThreadProcessId(IntPtr hWnd, ref Int32 lpdwProcessId);
+
+        [DllImport("User32.dll")]
+        public static extern IntPtr GetParent(IntPtr hWnd);
+
+        private const int SW_HIDE = 0;
+        private const int SW_SHOWNORMAL = 1;
+        private const int SW_NORMAL = 1;
+        private const int SW_SHOWMINIMIZED = 2;
+        private const int SW_SHOWMAXIMIZED = 3;
+        private const int SW_MAXIMIZE = 3;
+        private const int SW_SHOWNOACTIVATE = 4;
+        private const int SW_SHOW = 5;
+        private const int SW_MINIMIZE = 6;
+        private const int SW_SHOWMINNOACTIVE = 7;
+        private const int SW_SHOWNA = 8;
+        private const int SW_RESTORE = 9;
+        private const int SW_SHOWDEFAULT = 10;
+        private const int SW_MAX = 10;
+
+        private const uint SPI_GETFOREGROUNDLOCKTIMEOUT = 0x2000;
+        private const uint SPI_SETFOREGROUNDLOCKTIMEOUT = 0x2001;
+
+        private const int SPIF_SENDCHANGE = 0x2;
+
+
+        public static void BringWindowToFront(IntPtr hWnd)
+        {
+            if (IsIconic(hWnd))
+                ShowWindowAsync(hWnd, SW_RESTORE);
+
+            ShowWindowAsync(hWnd, SW_SHOW);
+
+            SetForegroundWindow(hWnd);
+
+            // Code from Karl E. Peterson, www.mvps.org/vb/sample.htm
+            // Converted to Delphi by Ray Lischner
+            // Published in The Delphi Magazine 55, page 16
+            // Converted to C# by Kevin Gale
+            IntPtr foregroundWindow = GetForegroundWindow();
+            IntPtr Dummy = IntPtr.Zero;
+
+            uint foregroundThreadId = GetWindowThreadProcessId(foregroundWindow, Dummy);
+
+            uint thisThreadId = GetWindowThreadProcessId(hWnd, Dummy);
+
+            if (AttachThreadInput(thisThreadId, foregroundThreadId, true))
+            {
+                BringWindowToTop(hWnd); // IE 5.5 related hack
+                SetForegroundWindow(hWnd);
+                AttachThreadInput(thisThreadId, foregroundThreadId, false);
+            }
+
+            if (GetForegroundWindow() != hWnd)
+            {
+                // Code by Daniel P. Stasinski
+                // Converted to C# by Kevin Gale
+                IntPtr Timeout = IntPtr.Zero;
+                SystemParametersInfo(SPI_GETFOREGROUNDLOCKTIMEOUT, 0, Timeout, 0);
+                SystemParametersInfo(SPI_SETFOREGROUNDLOCKTIMEOUT, 0, Dummy, SPIF_SENDCHANGE);
+                BringWindowToTop(hWnd); // IE 5.5 related hack
+                SetForegroundWindow(hWnd);
+                SystemParametersInfo(SPI_SETFOREGROUNDLOCKTIMEOUT, 0, Timeout, SPIF_SENDCHANGE);
+            }
+        }
+    }
+}