qpeapplication.cpp

Trolltech公司发布的图形界面操作系统。可在qt-embedded-2.3.7平台上编译为嵌入式图形界面操作系统。

static bool powerOnlineStopsSuspend()
{
    return !poweredsuspend_on && PowerStatusManager::readStatus().acStatus() == PowerStatus::Online;
}

static bool networkOnlineStopsSuspend()
{
    return !networkedsuspend_on && Network::networkOnline();
}

class QPEScreenSaver : public QWSScreenSaver
{

public:
    QPEScreenSaver()
    {
    }
    void restore()
    {
	setBacklight(-1);
    }
    bool save(int level)
    {
	switch ( level ) {
	 case 0:
	    if ( disable_suspend > 0 && dim_on ) {
		if (backlight() > 1)
		    setBacklight(1); // lowest non-off
	    }
	    return TRUE;
	    break;
	 case 1:
	    if ( disable_suspend > 1 && lightoff_on ) {
		setBacklight(0); // off
	    }
	    return TRUE;
	    break;
	 case 2:
	    if ( disable_suspend > 2 && !powerOnlineStopsSuspend() && !networkOnlineStopsSuspend() )
	    {
		QWSServer::processKeyEvent( 0xffff, Qt::Key_F34, FALSE, TRUE, FALSE );
		return FALSE;
	    }
	    return TRUE;
	    break;
	}
	return FALSE;
    }
};
#endif

static int ssi(int interval, Config &config, const QString &enable, const QString& value, int def)
{
    if ( !enable.isEmpty() && config.readNumEntry(enable,0) == 0 )
	return 0;

    if ( interval < 0 ) {
	// Restore screen blanking and power saving state
	interval = config.readNumEntry( value, def );
    }
    return interval;
}

static void setScreenSaverIntervals(int i1, int i2, int i3)
{
    Config config( "qpe" );
    config.setGroup( "Screensaver" );

    int v[4];
    i1 = ssi(i1, config, "Dim","Interval_Dim", 30); // No tr
    i2 = ssi(i2, config, "LightOff","Interval_LightOff", 20);
    i3 = ssi(i3, config, "","Interval", 60); // No tr

    //qDebug("screen saver intervals: %d %d %d", i1, i2, i3);

    v[0] = QMAX( 1000*i1, 100);
    v[1] = QMAX( 1000*i2, 100);
    v[2] = QMAX( 1000*i3, 100);
    v[3] = 0;
    dim_on = ( (i1 != 0) ? config.readNumEntry("Dim",1) : FALSE );
    lightoff_on = ( (i2 != 0 ) ? config.readNumEntry("LightOff",1) : FALSE );
    poweredsuspend_on = config.readNumEntry("Suspend",0);
    networkedsuspend_on = config.readNumEntry("NetworkedSuspend",1);
#ifdef Q_WS_QWS
    if ( !i1 && !i2 && !i3 )
	QWSServer::setScreenSaverInterval(0);
    else
	QWSServer::setScreenSaverIntervals(v);
#endif
}

#ifndef QTOPIA_DESKTOP
static void setScreenSaverInterval(int interval)
{
    setScreenSaverIntervals(-1,-1,interval);
}
#endif


/*!
  \class QPEApplication qpeapplication.h
  \brief The QPEApplication class implements various system services
    that are available to all Qtopia applications.

  Simply by using QPEApplication instead of QApplication, a standard Qt
  application becomes a Qtopia application. It automatically follows
  style changes, quits and raises, and in the
  case of \link docwidget.html document-oriented\endlink applications,
  changes the currently displayed document in response to the environment.

  To create a \link docwidget.html document-oriented\endlink
  application use showMainDocumentWidget(); to create a
  non-document-oriented application use showMainWidget(). The
  keepRunning() function indicates whether the application will
  continue running after it's processed the last \link qcop.html
  QCop\endlink message. This can be changed using setKeepRunning().

  A variety of signals are emitted when certain events occur, for
  example, timeChanged(), clockChanged(), weekChanged(),
  dateFormatChanged() and volumeChanged(). If the application receives
  a \link qcop.html QCop\endlink message on the application's
  QPE/Application/\e{appname} channel, the appMessage() signal is
  emitted. There are also flush() and reload() signals, which
  are emitted when synching begins and ends respectively - upon these
  signals, the application should save and reload any data
  files that are involved in synching. Most of these signals will initially
  be received and unfiltered through the appMessage() signal.

  This class also provides a set of useful static functions. The
  qpeDir() and documentDir() functions return the respective paths.
  The grabKeyboard() and ungrabKeyboard() functions are used to
  control whether the application takes control of the device's
  physical buttons (e.g. application launch keys). The stylus' mode of
  operation is set with setStylusOperation() and retrieved with
  stylusOperation(). There are also setInputMethodHint() and
  inputMethodHint() functions.

  \ingroup qtopiaemb
*/

/*!
    \enum QPEApplication::screenSaverHint

    \value Disable the screen should never blank
    \value DisableLightOff the screen should never blank and the
    backlight should never switch off
    \value DisableSuspend the screen should blank when the device goes
    into suspend mode
    \value Enable screen blanking and switching off the backlight are
    both enabled

    Currently, this is only used internally.

*/

/*!
  \fn void QPEApplication::clientMoused()

  \internal
*/

/*!
  \fn void QPEApplication::timeChanged();

  This signal is emitted when the time changes outside the normal
  passage of time, i.e. if the time is set backwards or forwards.

  If the application offers the TimeMonitor service, it will get
  the QCop message that causes this signal even if it is not running,
  thus allowing it to update any alarms or other time-related records.
*/

/*!
  \fn void QPEApplication::categoriesChanged();

  This signal is emitted whenever a category is added, removed or edited.
  Note, on Qtopia 1.5.0, this signal is never emitted.
*/

/*!
  \fn void QPEApplication::linkChanged( const QString &linkFile );

  This signal is emitted whenever an AppLnk or DocLnk is stored, removed or edited.
  \a linkFile contains the name of the link that is being modified.
*/

/*!
  \fn void QPEApplication::clockChanged( bool ampm );

  This signal is emitted when the user changes the clock's style. If
  \a ampm is TRUE, the user wants a 12-hour AM/PM clock, otherwise,
  they want a 24-hour clock.

  \warning if you use the TimeString functions, you should use
  TimeString::connectChange() instead.

  \sa dateFormatChanged()
*/

/*!
    \fn void QPEApplication::volumeChanged( bool muted )

    This signal is emitted whenever the mute state is changed. If \a
    muted is TRUE, then sound output has been muted.
*/

/*!
    \fn void QPEApplication::weekChanged( bool startOnMonday )

    This signal is emitted if the week start day is changed. If \a
    startOnMonday is TRUE then the first day of the week is Monday; if
    \a startOnMonday is FALSE then the first day of the week is
    Sunday.
*/

/*!
    \fn void QPEApplication::dateFormatChanged( DateFormat )

    This signal is emitted whenever the date format is changed.

    \warning if you use the TimeString functions, you should use
    TimeString::connectChange() instead.

    \sa clockChanged()
*/

/*!
    \fn void QPEApplication::flush()

    \internal
*/

/*!
    \fn void QPEApplication::reload()

    \internal
*/

/*!
  \fn void QPEApplication::appMessage( const QCString& msg, const QByteArray& data )

  This signal is emitted when a message is received on this
  application's QPE/Application/<i>appname</i> \link qcop.html
  QCop\endlink channel.

  The slot to which you connect this signal uses \a msg and \a data
  in the following way:

\code
    void MyWidget::receive( const QCString& msg, const QByteArray& data )
    {
	QDataStream stream( data, IO_ReadOnly );
	if ( msg == "someMessage(int,int,int)" ) {
	    int a,b,c;
	    stream >> a >> b >> c;
	    ...
	} else if ( msg == "otherMessage(QString)" ) {
	    ...
	}
    }
\endcode

   Note that messages received here may be processed by qpe application
   and emitted as signals, such as flush() and reload().
*/

void QPEApplication::processQCopFile()
{
#ifndef QTOPIA_DESKTOP
#ifdef Q_OS_UNIX
    QString qcopfn(Global::tempDir()+ "qcop-msg-");
    qcopfn += d->appName; // append command name
#else
    QString qcopfn(Global::tempDir() + "qcop-msg-");
    if (QApplication::winVersion() != Qt::WV_98)
	qcopfn += d->appName; // append command name
    else
	qcopfn += d->appName.lower(); // append command name
#endif

    QFile f(qcopfn);
    if ( f.open(IO_ReadWrite) ) {
#ifndef Q_OS_WIN32
	flock(f.handle(), LOCK_EX);
#endif
	QDataStream ds(&f);
	QCString channel, message;
	QByteArray data;
	while(!ds.atEnd()) {
	    ds >> channel >> message >> data;
	    d->enqueueQCop(channel,message,data);
	}
	Global::truncateFile(f, 0);
#ifndef Q_OS_WIN32
	f.flush();
	flock(f.handle(), LOCK_UN);
#endif
    }
#endif
}

/*!
  Constructs a QPEApplication just as you would construct
  a QApplication, passing \a argc, \a argv, and \a t.

  For applications, \a t should be the default, GuiClient. Only
  the Qtopia server passes GuiServer.
*/
QPEApplication::QPEApplication( int& argc, char **argv, Type t )
    : QApplication( hack(argc), argv, t )
#if defined(Q_WS_QWS) && !defined(QT_NO_COP)
, pidChannel(0)
#endif
{
    QPixmapCache::setCacheLimit(256);  // sensible default for smaller devices.
    d = new QPEApplicationData;
#ifdef Q_WS_QWS
    PluginLoaderIntern::init();
    d->loadTextCodecs();
    d->loadImageCodecs();
#endif

    int dw = desktop()->width();
    if ( dw < 200 ) {
	setFont( QFont( "helvetica", 8 ) );
#ifdef Q_WS_QWS
	AppLnk::setSmallIconSize(10);
	AppLnk::setBigIconSize(28);
#endif
    } else if ( dw > 600 ) {
	setFont( QFont( "helvetica", 12 ) );
#ifdef Q_WS_QWS
	AppLnk::setSmallIconSize(24);
	AppLnk::setBigIconSize(48);
#endif
    } else if ( dw > 400 ) {
	setFont( QFont( "helvetica", 12 ) );
#ifndef Q_WS_QWS
	AppLnk::setSmallIconSize(16);
	AppLnk::setBigIconSize(32);
#endif
    }

    QMimeSourceFactory::setDefaultFactory(new ResourceMimeFactory);

    connect(this, SIGNAL(lastWindowClosed()), this, SLOT(hideOrQuit()));

#if defined(Q_WS_QWS) && !defined(QT_NO_COP)

    sysChannel = new QCopChannel( "QPE/System", this );
    connect( sysChannel, SIGNAL(received(const QCString &, const QByteArray &)),
	     this, SLOT(systemMessage( const QCString &, const QByteArray &)) );
    
#if 0
#ifdef Q_OS_UNIX
    QCString channel = QCString(argv[0]);
#else
    QCString channel;
    if (QApplication::winVersion() != Qt::WV_98)
	channel += QString(argv[0]); // append command name
    else
	channel += QString(argv[0]).lower(); // append command name
#endif
    channel.replace(QRegExp(".*/"),"");
    d->appName = channel;
    channel = "QPE/Application/" + channel;
    pidChannel = new QCopChannel( channel, this);
    connect( pidChannel, SIGNAL(received(const QCString &, const QByteArray &)),
	    this, SLOT(pidMessage(const QCString &, const QByteArray &)));

    processQCopFile();
    d->keep_running = d->qcopq.isEmpty();

    for (int a=0; a<argc; a++) {
	if ( qstrcmp(argv[a],"-preload")==0 ) {
	    argv[a] = argv[a+1];
	    a++;
	    d->preloaded = TRUE;
	    argc-=1;
	} else if ( qstrcmp(argv[a],"-preload-show")==0 ) {
	    argv[a] = argv[a+1];
	    a++;
	    d->preloaded = TRUE;
	    d->forceshow = TRUE;
	    argc-=1;
	}
    }

    /* overide stored arguments */
    setArgs(argc, argv);
#else
    initApp( argc, argv );
#endif // #if 0

#endif
#if defined(Q_WS_QWS)
    FontDatabase::loadRenderers();  // load font factory plugins.
#endif

#ifndef QT_NO_TRANSLATION
    QStringList qms;
    qms << "libqpe";
    qms << "libqtopia";
    qms << d->appName;

    QStringList langs = Global::languageList();

    for (QStringList::ConstIterator it = langs.begin(); it!=langs.end(); ++it) {
	QString lang = *it;

	QTranslator * trans;
	QString tfn;

	for (QStringList::ConstIterator qmit = qms.begin(); qmit!=qms.end(); ++qmit) {
	    trans = new QTranslator(this);
	    tfn = qpeDir() + "i18n/" + lang + "/" + *qmit + ".qm";
	    if ( trans->load( tfn ))
		installTranslator( trans );
	    else
		delete trans;
	}

	//###language/font hack; should look it up somewhere
#ifdef Q_WS_QWS
	if ( lang == "ja" || lang == "zh_CN" || lang == "zh_TW" || lang == "ko" ) {
	    QFont fn = FontManager::unicodeFont( FontManager::Proportional );
	    setFont( fn );
	}
#endif
    }
#endif

    applyStyle();

#ifndef QTOPIA_DESKTOP
    if ( type() == GuiServer ) {
	setScreenSaverInterval(-1);
	setVolume();
#ifdef Q_WS_QWS
	QWSServer::setScreenSaver(new QPEScreenSaver);
#endif
    }
#endif

    installEventFilter( this );

#ifdef Q_WS_QWS
    QPEMenuToolFocusManager::initialize();
#endif

#ifdef QT_NO_QWS_CURSOR
    // if we have no cursor, probably don't want tooltips
    QToolTip::setEnabled( FALSE );
#endif
}


#ifdef QTOPIA_INTERNAL_INITAPP
void QPEApplication::initApp( int argc, char **argv )
{
    delete pidChannel;
    d->keep_running = TRUE;
    d->preloaded = FALSE;
    d->forceshow = FALSE;

#ifdef Q_OS_UNIX
    QCString channel = QCString(argv[0]);
#else
    QCString channel;
    if (QApplication::winVersion() != Qt::WV_98)
	channel += QString(argv[0]); // append command name
    else
	channel += QString(argv[0]).lower(); // append command name
#endif
    channel.replace(QRegExp(".*/"),"");
    d->appName = channel;

    qt_fbdpy->setIdentity( channel ); // In Qt/E 2.3.6

    channel = "QPE/Application/" + channel;
    pidChannel = new QCopChannel( channel, this);
    connect( pidChannel, SIGNAL(received(const QCString &, const QByteArray &)),
	    this, SLOT(pidMessage(const QCString &, const QByteArray &)));

    processQCopFile();
    d->keep_running = d->qcopq.isEmpty();

    for (int a=0; a<argc; a++) {
	if ( qstrcmp(argv[a],"-preload")==0 ) {
	    argv[a] = argv[a+1];
	    a++;
	    d->preloaded = TRUE;
	    argc-=1;
	} else if ( qstrcmp(argv[a],"-preload-show")==0 ) {
	    argv[a] = argv[a+1];
	    a++;
	    d->preloaded = TRUE;
	    d->forceshow = TRUE;
	    argc-=1;
	}
    }

    /* overide stored arguments */
    setArgs(argc, argv);
}
#endif

static QPtrDict<void>* inputMethodDict=0;
static void createInputMethodDict()
{
    if ( !inputMethodDict )
	inputMethodDict = new QPtrDict<void>;
}

/*!
  Returns the currently set hint to the system as to whether
  widget \a w has any use for text input methods.

  \sa setInputMethodHint() InputMethodHint
*/
QPEApplication::InputMethodHint QPEApplication::inputMethodHint( QWidget* w )
{
    if ( inputMethodDict && w )
	return (InputMethodHint)(int)inputMethodDict->find(w);
    return Normal;
}

/*!
    \enum QPEApplication::InputMethodHint

    \value Normal the application sometimes needs text input (the default).
    \value AlwaysOff the application never needs text input.
    \value AlwaysOn the application always needs text input.

    \sa inputMethodHint() setInputMethodHint()
*/

/*!
  Hints to the system that widget \a w has use for text input methods
  as specified by \a mode.

  \sa inputMethodHint() InputMethodHint
*/
void QPEApplication::setInputMethodHint( QWidget* w, InputMethodHint mode )
{
    createInputMethodDict();
    if ( mode == Normal ) {
	inputMethodDict->remove(w);
    } else {
	inputMethodDict->insert(w,(void*)mode);
    }
}

class HackDialog : public QDialog
{
public:
    void acceptIt() { accept(); }
    void rejectIt() { reject(); }
};


void QPEApplication::mapToDefaultAction( QWSKeyEvent *ke, int key )
{
    // specialised actions for certain widgets. May want to
    // add more stuff here.
    if ( activePopupWidget() && activePopupWidget()->inherits( "QListBox" )
	 && activePopupWidget()->parentWidget()
	 && activePopupWidget()->parentWidget()->inherits( "QComboBox" ) )
	key = Qt::Key_Return;

    if ( activePopupWidget() && activePopupWidget()->inherits( "QPopupMenu" ) )
	key = Qt::Key_Return;