translating qt3 querylist to qt4

[cinemaster]

Hi,

I have the following code in qt3 that I've been trying unsuccessfully to port to qt4 using qlist and findchildren. How would the following translate to qt4?

QObject *obj2;
    QObjectList *l2 = MyTabPage->queryList("QPushButton","leHS*",true,false);
    QObjectListIt it4( *l2 ); // iterate over the buttons
 
    while ( (obj2 = it4.current()) != 0 ) {
      qDebug("  Connecting \"%s\"",obj2->name());
      connect( ((QLineEdit *)obj2), SIGNAL(NumberChanged(double)),SLOT(CalcProceeds()) );
      // for each found object...
      ++it4;
    }

QObject *obj2;
    QObjectList *l2 = MyTabPage->queryList("QPushButton","leHS*",true,false);
    QObjectListIt it4( *l2 ); // iterate over the buttons

    while ( (obj2 = it4.current()) != 0 ) {
      qDebug("  Connecting \"%s\"",obj2->name());
      connect( ((QLineEdit *)obj2), SIGNAL(NumberChanged(double)),SLOT(CalcProceeds()) );
      // for each found object...
      ++it4;
    }

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Thanks!

Gene

[jacek]

This should work:

foreach( CustomLineEdit *obj, MyTabPage->findChildren< CustomLineEdit * >( QRegExp( "leHS.*" ) ) ) {
   qDebug() << "  Connecting" << obj->objectName();
   connect( obj, SIGNAL(NumberChanged(double)), SLOT(CalcProceeds()) );
}

foreach( CustomLineEdit *obj, MyTabPage->findChildren< CustomLineEdit * >( QRegExp( "leHS.*" ) ) ) {
   qDebug() << "  Connecting" << obj->objectName();
   connect( obj, SIGNAL(NumberChanged(double)), SLOT(CalcProceeds()) );
}

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Replace CustomLineEdit with your custom line edit's class name.

[cinemaster]

This should work:

foreach( CustomLineEdit *obj, MyTabPage->findChildren< CustomLineEdit * >( QRegExp( "leHS.*" ) ) ) {
   qDebug() << "  Connecting" << obj->objectName();
   connect( obj, SIGNAL(NumberChanged(double)), SLOT(CalcProceeds()) );
}

foreach( CustomLineEdit *obj, MyTabPage->findChildren< CustomLineEdit * >( QRegExp( "leHS.*" ) ) ) {
   qDebug() << "  Connecting" << obj->objectName();
   connect( obj, SIGNAL(NumberChanged(double)), SLOT(CalcProceeds()) );
}

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Replace CustomLineEdit with your custom line edit's class name.

This looks really good, and quite a difference in structure. Does this find all children & grandchildren, or just children? From my understanding, findChildren finds all, but I only wanted the direct children.

Thanks for pointing out the "foreach" addition as well, I hadn't known about that.

Thanks for the help!
Gene

[jacek]

Does this find all children & grandchildren, or just children? From my understanding, findChildren finds all, but I only wanted the direct children.

According to the docs the search is recursive and it seems that there is no other way than:

if( obj->parent() == MyTabPage ) {
   ...
}

if( obj->parent() == MyTabPage ) {
   ...
}

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[cinemaster]

According to the docs the search is recursive and it seems that there is no other way than:

if( obj->parent() == MyTabPage ) {
   ...
}

if( obj->parent() == MyTabPage ) {
   ...
}

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I was afraid of that.
Thanks for the help,
Gene