src/winmain/qtmain_win.cpp

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   3 ** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
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   5 ** Contact: Nokia Corporation (qt-info@nokia.com)
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   7 ** This file is part of the Windows main function of the Qt Toolkit.
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  40
  41 #include "qt_windows.h"
  42 #include "qbytearray.h"
  43 #include "qstring.h"
  44 #include "qvector.h"
  45
  46 /*
  47   This file contains the code in the qtmain library for Windows.
  48   qtmain contains the Windows startup code and is required for
  49   linking to the Qt DLL.
  50
  51   When a Windows application starts, the WinMain function is
  52   invoked. WinMain calls qWinMain in the Qt DLL/library, which
  53   initializes Qt.
  54 */
  55
  56 QT_BEGIN_NAMESPACE
  57
  58 #if defined(Q_OS_WINCE)
  59 extern void __cdecl qWinMain(HINSTANCE, HINSTANCE, LPSTR, int, int &, QVector<char *> &);
  60 #else
  61 extern void qWinMain(HINSTANCE, HINSTANCE, LPSTR, int, int &, QVector<char *> &);
  62 #endif
  63
  64 QT_END_NAMESPACE
  65
  66 QT_USE_NAMESPACE
  67
  68
  69 #if defined(QT_NEEDS_QMAIN)
  70 int qMain(int, char **);
  71 #define main qMain
  72 #else
  73 #ifdef Q_OS_WINCE
  74 extern "C" int __cdecl main(int, char **);
  75 #else
  76 extern "C" int main(int, char **);
  77 #endif
  78 #endif
  79
  80 /*
  81   WinMain() - Initializes Windows and calls user's startup function main().
  82   NOTE: WinMain() won't be called if the application was linked as a "console"
  83   application.
  84 */
  85
  86 #ifdef Q_OS_WINCE
  87 int WINAPI WinMain(HINSTANCE instance, HINSTANCE prevInstance, LPWSTR /*wCmdParam*/, int cmdShow)
  88 #else
  89 extern "C"
  90 int APIENTRY WinMain(HINSTANCE instance, HINSTANCE prevInstance, LPSTR /*cmdParamarg*/, int cmdShow)
  91 #endif
  92 {
  93     QByteArray cmdParam;
  94     QT_WA({
  95         LPTSTR cmdline = GetCommandLineW();
  96         cmdParam = QString::fromUtf16((const unsigned short *)cmdline).toLocal8Bit();
  97     }, {
  98         cmdParam = GetCommandLineA();
  99     });
 100
 101 #if defined(Q_OS_WINCE)
 102     TCHAR appName[256];
 103     GetModuleFileName(0, appName, 255);
 104     cmdParam = QString(QLatin1String("\"%1\" ")).arg(QString::fromUtf16((const unsigned short *)appName)).toLocal8Bit() + cmdParam;
 105 #endif
 106
 107     int argc = 0;
 108     QVector<char *> argv(8);
 109     qWinMain(instance, prevInstance, cmdParam.data(), cmdShow, argc, argv);
 110
 111 #if defined(Q_OS_WINCE)
 112     TCHAR uniqueAppID[256];
 113     GetModuleFileName(0, uniqueAppID, 255);
 114     QString uid = QString::fromUtf16((const unsigned short *)uniqueAppID).toLower().replace(QString(QLatin1String("\\")), QString(QLatin1String("_")));
 115
 116     // If there exists an other instance of this application
 117     // it will be the owner of a mutex with the unique ID.
 118     HANDLE mutex = CreateMutex(NULL, TRUE, (LPCWSTR)uid.utf16());
 119     if (mutex && ERROR_ALREADY_EXISTS == GetLastError()) {
 120         CloseHandle(mutex);
 121
 122         // The app is already running, so we use the unique
 123         // ID to create a unique messageNo, which is used
 124         // as the registered class name for the windows
 125         // created. Set the first instance's window to the
 126         // foreground, else just terminate.
 127         // Use bitwise 0x01 OR to reactivate window state if
 128         // it was hidden
 129         UINT msgNo = RegisterWindowMessage((LPCWSTR)uid.utf16());
 130         HWND aHwnd = FindWindow((LPCWSTR)QString::number(msgNo).utf16(), 0);
 131         if (aHwnd)
 132             SetForegroundWindow((HWND)(((ULONG)aHwnd) | 0x01));
 133         return 0;
 134     }
 135 #endif // Q_OS_WINCE
 136
 137     int result = main(argc, argv.data());
 138 #if defined(Q_OS_WINCE)
 139     CloseHandle(mutex);
 140 #endif
 141     return result;
 142 }