The mainwidget could be deleted before the qpeapplication will be destructed or

the event loop will be left.
Use a QGuardedPtr to not save widget coordinates on a not anymore existing
mainwidget

1 files changed, 4 insertions, 1 deletions

diff --git a/library/qpeapplication.cpp b/library/qpeapplication.cpp
index 2bd7cbe..953f9d0 100644
--- a/library/qpeapplication.cpp
+++ b/library/qpeapplication.cpp
@@ -74,344 +74,347 @@
 #include "global.h"
 #include "resource.h"
 #if QT_VERSION <= 230 && defined(QT_NO_CODECS)
 #include "qutfcodec.h"
 #endif
 #include "config.h"
 #include "network.h"
 #ifdef QWS
 #include "fontmanager.h"
 #include "fontdatabase.h"
 #endif
 
 #include "alarmserver.h"
 #include "applnk.h"
 #include "qpemenubar.h"
 #include "textcodecinterface.h"
 #include "imagecodecinterface.h"
 #include <qtopia/qpeglobal.h>
 
 #include <unistd.h>
 #include <sys/file.h>
 #include <sys/ioctl.h>
 #ifndef QT_NO_SOUND
 #include <sys/soundcard.h>
 #endif
 
 #include <backend/rohfeedback.h>
 
 
 static bool useBigPixmaps = 0;
 
 class HackWidget : public QWidget
 {
 public:
     bool needsOk()
     { return (getWState() & WState_Reserved1 ); }
 
     QRect normalGeometry()
     { return topData()->normalGeometry; };
 };
 
 class QPEApplicationData
 {
 public:
     QPEApplicationData ( ) :
           presstimer( 0 ), presswidget( 0 ), rightpressed( false ), kbgrabbed( false ),
           notbusysent( false ), preloaded( false ), forceshow( false ), nomaximize( false ),
           keep_running( true ), qcopQok( false ),
           fontFamily( "Vera" ), fontSize( 10 ), smallIconSize( 14 ),
           bigIconSize( 32 ), qpe_main_widget( 0 )
     {
         Config cfg( "qpe" );
         cfg.setGroup( "Appearance" );
         useBigPixmaps = cfg.readBoolEntry( "useBigPixmaps", false );
         fontFamily = cfg.readEntry( "FontFamily", "Vera" );
         fontSize = cfg.readNumEntry( "FontSize", 10 );
         smallIconSize = cfg.readNumEntry( "SmallIconSize", 14 );
         bigIconSize = cfg.readNumEntry( "BigIconSize", 32 );
 #ifdef OPIE_WITHROHFEEDBACK
         RoH = 0;
 #endif
     }
 
     int presstimer;
     QWidget* presswidget;
     QPoint presspos;
 #ifdef OPIE_WITHROHFEEDBACK
     Opie::Internal::RoHFeedback *RoH;
 #endif
 
     bool rightpressed : 1;
     bool kbgrabbed    : 1;
     bool notbusysent  : 1;
     bool preloaded    : 1;
     bool forceshow    : 1;
     bool nomaximize   : 1;
     bool keep_running : 1;
     bool qcopQok      : 1;
 
     QCString fontFamily;
     int fontSize;
     int smallIconSize;
     int bigIconSize;
 
     QString appName;
     struct QCopRec
     {
         QCopRec( const QCString &ch, const QCString &msg,
                  const QByteArray &d ) :
                 channel( ch ), message( msg ), data( d )
         { }
 
         QCString channel;
         QCString message;
         QByteArray data;
     };
-    QWidget* qpe_main_widget;
+    QGuardedPtr<QWidget> qpe_main_widget;
         QGuardedPtr<QWidget> lastraised;
     QQueue<QCopRec> qcopq;
         QString styleName;
     QString decorationName;
 
     void enqueueQCop( const QCString &ch, const QCString &msg,
                       const QByteArray &data )
     {
         qcopq.enqueue( new QCopRec( ch, msg, data ) );
     }
     void sendQCopQ()
     {
             if (!qcopQok )
                 return;
 
         QCopRec * r;
 
            while((r=qcopq.dequeue())) {
                // remove from queue before sending...
                // event loop can come around again before getting
                // back from sendLocally
 #ifndef QT_NO_COP
                QCopChannel::sendLocally( r->channel, r->message, r->data );
 #endif
 
            delete r;
            }
     }
 
     static void show_mx(QWidget* mw, bool nomaximize, QString &strName) {
         if ( mw->inherits("QMainWindow") || mw->isA("QMainWindow") )
         {
             ( (  QMainWindow* ) mw )->setUsesBigPixmaps( useBigPixmaps );
         }
         QPoint p;
         QSize s;
         bool max;
 
         if ( mw->isVisible() ) {
             if ( read_widget_rect(strName, max, p, s) && validate_widget_size(mw, p, s) ) {
                 mw->resize(s);
                 mw->move(p);
             }
             mw->raise();
         } else {
 
             if ( mw->layout() && mw->inherits("QDialog") ) {
                 if ( read_widget_rect(strName, max, p, s) && validate_widget_size(mw, p, s) ) {
                     mw->resize(s);
                     mw->move(p);
 
                     if ( max && !nomaximize ) {
                         mw->showMaximized();
                     } else {
                         mw->show();
                     }
                 } else {
                     QPEApplication::showDialog((QDialog*)mw,nomaximize);
                 }
             } else {
                 if ( read_widget_rect(strName, max, p, s) && validate_widget_size(mw, p, s) ) {
                     mw->resize(s);
                     mw->move(p);
                 } else {    //no stored rectangle, make an estimation
                     int x = (qApp->desktop()->width()-mw->frameGeometry().width())/2;
                     int y = (qApp->desktop()->height()-mw->frameGeometry().height())/2;
                     mw->move( QMAX(x,0), QMAX(y,0) );
 #ifdef Q_WS_QWS
                     if ( !nomaximize )
                         mw->showMaximized();
 #endif
                 }
                 if ( max && !nomaximize )
                     mw->showMaximized();
                 else
                     mw->show();
             }
         }
     }
 
     static bool read_widget_rect(const QString &app, bool &maximized, QPoint &p, QSize &s)
     {
     maximized = TRUE;
     // 350 is the trigger in qwsdefaultdecoration for providing a resize button
     if ( qApp->desktop()->width() <= 350 )
         return FALSE;
 
     Config cfg( "qpe" );
     cfg.setGroup("ApplicationPositions");
     QString str = cfg.readEntry( app, QString::null );
     QStringList l = QStringList::split(",", str);
 
     if ( l.count() == 5) {
         p.setX( l[0].toInt() );
         p.setY( l[1].toInt() );
 
         s.setWidth( l[2].toInt() );
         s.setHeight( l[3].toInt() );
 
         maximized = l[4].toInt();
 
         return TRUE;
     }
 
     return FALSE;
     }
 
 
         static bool validate_widget_size(const QWidget *w, QPoint &p, QSize &s)
     {
 #ifndef Q_WS_QWS
     QRect qt_maxWindowRect = qApp->desktop()->geometry();
 #endif
     int maxX = qt_maxWindowRect.width();
     int maxY = qt_maxWindowRect.height();
     int wWidth = s.width() + ( w->frameGeometry().width() - w->geometry().width() );
     int wHeight = s.height() + ( w->frameGeometry().height() - w->geometry().height() );
 
     // total window size is not allowed to be larger than desktop window size
     if ( ( wWidth >= maxX ) && ( wHeight >= maxY ) )
         return FALSE;
 
     if ( wWidth > maxX ) {
         s.setWidth( maxX - (w->frameGeometry().width() - w->geometry().width() ) );
         wWidth = maxX;
     }
 
     if ( wHeight > maxY ) {
         s.setHeight( maxY - (w->frameGeometry().height() - w->geometry().height() ) );
         wHeight = maxY;
     }
 
     // any smaller than this and the maximize/close/help buttons will be overlapping
     if ( wWidth < 80 || wHeight < 60 )
         return FALSE;
 
     if ( p.x() < 0 )
         p.setX(0);
     if ( p.y() < 0 )
         p.setY(0);
 
     if ( p.x() + wWidth > maxX )
         p.setX( maxX - wWidth );
     if ( p.y() + wHeight > maxY )
         p.setY( maxY - wHeight );
 
     return TRUE;
     }
 
     static void store_widget_rect(QWidget *w, QString &app)
     {
+    if( !w )
+	return;
+
     // 350 is the trigger in qwsdefaultdecoration for providing a resize button
     if ( qApp->desktop()->width() <= 350 )
         return;
     // we use these to map the offset of geometry and pos.  ( we can only use normalGeometry to
     // get the non-maximized version, so we have to do it the hard way )
     int offsetX = w->x() - w->geometry().left();
     int offsetY = w->y() - w->geometry().top();
 
     QRect r;
     if ( w->isMaximized() )
         r = ( (HackWidget *) w)->normalGeometry();
     else
         r = w->geometry();
 
     // Stores the window placement as pos(), size()  (due to the offset mapping)
     Config cfg( "qpe" );
     cfg.setGroup("ApplicationPositions");
     QString s;
     s.sprintf("%d,%d,%d,%d,%d", r.left() + offsetX, r.top() + offsetY, r.width(), r.height(), w->isMaximized() );
     cfg.writeEntry( app, s );
     }
 
     static bool setWidgetCaptionFromAppName( QWidget* /*mw*/, const QString& /*appName*/, const QString& /*appsPath*/ )
     {
         /*
         // This works but disable it for now until it is safe to apply
         // What is does is scan the .desktop files of all the apps for
         // the applnk that has the corresponding argv[0] as this program
         // then it uses the name stored in the .desktop file as the caption
         // for the main widget. This saves duplicating translations for
         // the app name in the program and in the .desktop files.
 
         AppLnkSet apps( appsPath );
 
         QList<AppLnk> appsList = apps.children();
         for ( QListIterator<AppLnk> it(appsList); it.current(); ++it ) {
           if ( (*it)->exec() == appName ) {
         mw->setCaption( (*it)->name() );
         return TRUE;
           }
         }
         */
         return FALSE;
     }
 
 
     void show(QWidget* mw, bool nomax)
     {
         setWidgetCaptionFromAppName( mw, appName, QPEApplication::qpeDir() + "apps" );
         nomaximize = nomax;
         qpe_main_widget = mw;
                 qcopQok = TRUE;
 #ifndef QT_NO_COP
 
         sendQCopQ();
 #endif
 
         if ( preloaded ) {
             if (forceshow)
                 show_mx(mw, nomax, appName);
         }
         else if ( keep_running ) {
             show_mx(mw, nomax, appName);
         }
     }
 
     void loadTextCodecs()
     {
         QString path = QPEApplication::qpeDir() + "plugins/textcodecs";
 #ifdef Q_OS_MACX
         QDir dir( path, "lib*.dylib" );
 #else
         QDir dir( path, "lib*.so" );
 #endif
         QStringList list;
         if ( dir. exists ( ))
             list = dir.entryList();
         QStringList::Iterator it;
         for ( it = list.begin(); it != list.end(); ++it ) {
             TextCodecInterface *iface = 0;
             QLibrary *lib = new QLibrary( path + "/" + *it );
             if ( lib->queryInterface( IID_QtopiaTextCodec, (QUnknownInterface**)&iface ) == QS_OK && iface ) {
                 QValueList<int> mibs = iface->mibEnums();
                 for (QValueList<int>::ConstIterator i = mibs.begin(); i != mibs.end(); ++i) {
                     (void)iface->createForMib(*i);
                     // ### it exists now; need to remember if we can delete it
                 }
             }
             else {
                 lib->unload();
                 delete lib;
             }
         }
     }
 
     void loadImageCodecs()