src/WinMain.cpp

   1 // ==========================================================================
   2 // qtmain_win.cpp
   3 // ==========================================================================
   4 //
   5 // This source file is included from Qt v4.8.4, because VS2012 won't link
   6 // with the 'qtmain.lib' from the official Qt v4.8.4 (VS2010) release.
   7 //
   8 // ==========================================================================
   9
  10 /****************************************************************************
  11 **
  12 ** Copyright (C) 2012 Digia Plc and/or its subsidiary(-ies).
  13 ** Contact: http://www.qt-project.org/legal
  14 **
  15 ** This file is part of the Windows main function of the Qt Toolkit.
  16 **
  17 ** $QT_BEGIN_LICENSE:BSD$
  18 ** You may use this file under the terms of the BSD license as follows:
  19 **
  20 ** "Redistribution and use in source and binary forms, with or without
  21 ** modification, are permitted provided that the following conditions are
  22 ** met:
  23 **   * Redistributions of source code must retain the above copyright
  24 **     notice, this list of conditions and the following disclaimer.
  25 **   * Redistributions in binary form must reproduce the above copyright
  26 **     notice, this list of conditions and the following disclaimer in
  27 **     the documentation and/or other materials provided with the
  28 **     distribution.
  29 **   * Neither the name of Digia Plc and its Subsidiary(-ies) nor the names
  30 **     of its contributors may be used to endorse or promote products derived
  31 **     from this software without specific prior written permission.
  32 **
  33 **
  34 ** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  35 ** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  36 ** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  37 ** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  38 ** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  39 ** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  40 ** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  41 ** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  42 ** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  43 ** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  44 ** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
  45 **
  46 ** $QT_END_LICENSE$
  47 **
  48 ****************************************************************************/
  49
  50 #include "qt_windows.h"
  51 #include "qbytearray.h"
  52 #include "qstring.h"
  53 #include "qvector.h"
  54
  55 /*
  56   This file contains the code in the qtmain library for Windows.
  57   qtmain contains the Windows startup code and is required for
  58   linking to the Qt DLL.
  59
  60   When a Windows application starts, the WinMain function is
  61   invoked. WinMain calls qWinMain in the Qt DLL/library, which
  62   initializes Qt.
  63 */
  64
  65 QT_BEGIN_NAMESPACE
  66
  67 #if defined(Q_OS_WINCE)
  68 extern void __cdecl qWinMain(HINSTANCE, HINSTANCE, LPSTR, int, int &, QVector<char *> &);
  69 #else
  70 extern void qWinMain(HINSTANCE, HINSTANCE, LPSTR, int, int &, QVector<char *> &);
  71 #endif
  72
  73 QT_END_NAMESPACE
  74
  75 QT_USE_NAMESPACE
  76
  77
  78 #if defined(QT_NEEDS_QMAIN)
  79 int qMain(int, char **);
  80 #define main qMain
  81 #else
  82 #ifdef Q_OS_WINCE
  83 extern "C" int __cdecl main(int, char **);
  84 #else
  85 extern "C" int main(int, char **);
  86 #endif
  87 #endif
  88
  89 /*
  90   WinMain() - Initializes Windows and calls user's startup function main().
  91   NOTE: WinMain() won't be called if the application was linked as a "console"
  92   application.
  93 */
  94
  95 #ifdef Q_OS_WINCE
  96 int WINAPI WinMain(HINSTANCE instance, HINSTANCE prevInstance, LPWSTR /*wCmdParam*/, int cmdShow)
  97 #else
  98 extern "C"
  99 int APIENTRY WinMain(HINSTANCE instance, HINSTANCE prevInstance, LPSTR /*cmdParamarg*/, int cmdShow)
 100 #endif
 101 {
 102     QByteArray cmdParam = QString::fromWCharArray(GetCommandLine()).toLocal8Bit();
 103
 104 #if defined(Q_OS_WINCE)
 105     wchar_t appName[MAX_PATH];
 106     GetModuleFileName(0, appName, MAX_PATH);
 107     cmdParam.prepend(QString(QLatin1String("\"%1\" ")).arg(QString::fromWCharArray(appName)).toLocal8Bit());
 108 #endif
 109
 110     int argc = 0;
 111     QVector<char *> argv(8);
 112     qWinMain(instance, prevInstance, cmdParam.data(), cmdShow, argc, argv);
 113
 114 #if defined(Q_OS_WINCE)
 115     wchar_t uniqueAppID[MAX_PATH];
 116     GetModuleFileName(0, uniqueAppID, MAX_PATH);
 117     QString uid = QString::fromWCharArray(uniqueAppID).toLower().replace(QLatin1String("\\"), QLatin1String("_"));
 118
 119     // If there exists an other instance of this application
 120     // it will be the owner of a mutex with the unique ID.
 121     HANDLE mutex = CreateMutex(NULL, TRUE, (LPCWSTR)uid.utf16());
 122     if (mutex && ERROR_ALREADY_EXISTS == GetLastError()) {
 123         CloseHandle(mutex);
 124
 125         // The app is already running, so we use the unique
 126         // ID to create a unique messageNo, which is used
 127         // as the registered class name for the windows
 128         // created. Set the first instance's window to the
 129         // foreground, else just terminate.
 130         // Use bitwise 0x01 OR to reactivate window state if
 131         // it was hidden
 132         UINT msgNo = RegisterWindowMessage((LPCWSTR)uid.utf16());
 133         HWND aHwnd = FindWindow((LPCWSTR)QString::number(msgNo).utf16(), 0);
 134         if (aHwnd)
 135             SetForegroundWindow((HWND)(((ULONG)aHwnd) | 0x01));
 136         return 0;
 137     }
 138 #endif // Q_OS_WINCE
 139
 140     int result = main(argc, argv.data());
 141 #if defined(Q_OS_WINCE)
 142     CloseHandle(mutex);
 143 #endif
 144     return result;
 145 }