Improved instance handling in AppMan, closes #642.

Author: Meychi

External/Tools/AppMan/MainForm.cs

@@ -77,6 +77,33 @@ public MainForm(String[] args)
             if (!Win32.IsRunningOnMono) Application.AddMessageFilter(this);
         }
 
+        #region Instancing
+
+        /// <summary>
+        /// Handle the instance message
+        /// </summary>
+        protected override void WndProc(ref Message m)
+        {
+            if (m.Msg == Win32.WM_SHOWME) this.RestoreWindow();
+            base.WndProc(ref m);
+        }
+
+        /// <summary>
+        /// Restore the window of the first instance
+        /// </summary>
+        private void RestoreWindow()
+        {
+            if (this.WindowState == FormWindowState.Minimized)
+            {
+                this.WindowState = FormWindowState.Normal;
+            }
+            Boolean top = this.TopMost;
+            this.TopMost = true;
+            this.TopMost = top;
+        }
+
+        #endregion
+
         #region Initialization
 
         /// <summary>

External/Tools/AppMan/Program.cs

@@ -28,8 +28,12 @@ static void Main(String[] args)
             }
             else if (Array.IndexOf(args, "-minimized") == -1)
             {
-                MessageBox.Show("AppMan is already running.");
+                if (Win32.IsRunningOnMono) MessageBox.Show("AppMan is already running.");
+                else Win32.PostMessage((IntPtr)Win32.HWND_BROADCAST, Win32.WM_SHOWME, IntPtr.Zero, IntPtr.Zero);
             }
         }
+
     }
+
 }
+

External/Tools/AppMan/Win32.cs

@@ -11,9 +11,17 @@ namespace AppMan
     public class Win32
     {
         /// <summary>
-        /// Tells if we are running on Mono runtime
+        /// Public static props
         /// </summary>
-        public static Boolean IsRunningOnMono = Type.GetType("Mono.Runtime") != null;
+        public static Boolean IsRunningOnMono;
+        public static Int32 HWND_BROADCAST = 0xffff;
+        public static Int32 WM_SHOWME;
+
+        static Win32()
+        {
+            IsRunningOnMono = Type.GetType("Mono.Runtime") != null;
+            if (IsRunningOnMono) WM_SHOWME = RegisterWindowMessage("WM_SHOWME");
+        }
 
         #region Externs
 
@@ -24,10 +32,16 @@ public class Win32
         public static extern IntPtr SendMessage(IntPtr hWnd, Int32 msg, IntPtr wp, IntPtr lp);
 
         [DllImport("kernel32.dll", SetLastError = true, CharSet = CharSet.Unicode)]
-        internal static extern uint GetFullPathName(string lpFileName, uint nBufferLength, StringBuilder lpBuffer, IntPtr mustBeNull);
+        internal static extern UInt32 GetFullPathName(String lpFileName, UInt32 nBufferLength, StringBuilder lpBuffer, IntPtr mustBeNull);
 
         [DllImport("kernel32.dll", SetLastError = true, CharSet = CharSet.Unicode)]
-        internal static extern SafeFileHandle CreateFile(string lpFileName, EFileAccess dwDesiredAccess, uint dwShareMode, IntPtr lpSecurityAttributes, uint dwCreationDisposition, uint dwFlagsAndAttributes, IntPtr hTemplateFile);
+        internal static extern SafeFileHandle CreateFile(String lpFileName, EFileAccess dwDesiredAccess, UInt32 dwShareMode, IntPtr lpSecurityAttributes, UInt32 dwCreationDisposition, UInt32 dwFlagsAndAttributes, IntPtr hTemplateFile);
+        
+        [DllImport("user32.dll")]
+        public static extern Boolean PostMessage(IntPtr hwnd, Int32 msg, IntPtr wparam, IntPtr lparam);
+
+        [DllImport("user32.dll")]
+        public static extern Int32 RegisterWindowMessage(String message);
 
         #endregion