src/winmain/qtmain_win.cpp

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   3 ** Copyright (C) 2010 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 = QString::fromWCharArray(GetCommandLine()).toLocal8Bit();
  94
  95 #if defined(Q_OS_WINCE)
  96     wchar_t appName[MAX_PATH];
  97     GetModuleFileName(0, appName, MAX_PATH);
  98     cmdParam.prepend(QString(QLatin1String("\"%1\" ")).arg(QString::fromWCharArray(appName)).toLocal8Bit());
  99 #endif
 100
 101     int argc = 0;
 102     QVector<char *> argv(8);
 103     qWinMain(instance, prevInstance, cmdParam.data(), cmdShow, argc, argv);
 104
 105 #if defined(Q_OS_WINCE)
 106     wchar_t uniqueAppID[MAX_PATH];
 107     GetModuleFileName(0, uniqueAppID, MAX_PATH);
 108     QString uid = QString::fromWCharArray(uniqueAppID).toLower().replace(QLatin1String("\\"), QLatin1String("_"));
 109
 110     // If there exists an other instance of this application
 111     // it will be the owner of a mutex with the unique ID.
 112     HANDLE mutex = CreateMutex(NULL, TRUE, (LPCWSTR)uid.utf16());
 113     if (mutex && ERROR_ALREADY_EXISTS == GetLastError()) {
 114         CloseHandle(mutex);
 115
 116         // The app is already running, so we use the unique
 117         // ID to create a unique messageNo, which is used
 118         // as the registered class name for the windows
 119         // created. Set the first instance's window to the
 120         // foreground, else just terminate.
 121         // Use bitwise 0x01 OR to reactivate window state if
 122         // it was hidden
 123         UINT msgNo = RegisterWindowMessage((LPCWSTR)uid.utf16());
 124         HWND aHwnd = FindWindow((LPCWSTR)QString::number(msgNo).utf16(), 0);
 125         if (aHwnd)
 126             SetForegroundWindow((HWND)(((ULONG)aHwnd) | 0x01));
 127         return 0;
 128     }
 129 #endif // Q_OS_WINCE
 130
 131     int result = main(argc, argv.data());
 132 #if defined(Q_OS_WINCE)
 133     CloseHandle(mutex);
 134 #endif
 135     return result;
 136 }