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dev:notes_on_porting_to_qt4_examples [2008/08/31 19:49]
emrum |
dev:notes_on_porting_to_qt4_examples [2018/02/07 16:07]
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| ====== How to convert . qt3->qt4 . kde3->kde4 ====== | |
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| This may be a help, for new contributors to the qt4/kde4 port of rosegarden. It may also serve to see, what could be replaced with "search'n replace scripts". If possible, **avoid to use the Q3Support** and includes. Use the new Qt4 classes instead. Reason: Q3Support doesn't work as well, as it one might expect and we need to move to Qt4 anyway. | |
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| ===== examples ===== | |
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| (if you find something new, add it on the top !) | |
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| (if you find something wrong, tell how it would be better.) | |
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| ------------------------------------------------------- | |
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| <code> | |
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| errMsg = i18n(QString("Could not open") ); | |
| ==> | |
| errMsg = i18n(QString("Could not open").toUtf8() ); | |
| or | |
| errMsg = i18n(QString("Could not open").toUtf8().data() ); | |
| (?) | |
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| Casting std::string to (const char*) | |
| ==> | |
| const char * s = st.c_str() | |
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| string.lower() | |
| ==> | |
| string.toLower() | |
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| outStream.setEncoding('UTF-8') | |
| ==> | |
| outStream.setCodec( (char*)"UTF-8" ); | |
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| QProgressBar->setProgress(9) | |
| ==> | |
| QProgressBar->setValue(9) | |
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| if (extraAttributes) // where extraAttributes is QString | |
| ==> | |
| if ( ! extraAttributes.isEmpty() ) | |
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| KConfig* config = KGlobal::config(); | |
| config->setGroup(GeneralOptionsConfigGroup); | |
| v = config->readUnsignedNumEntry( .. ) | |
| ==> | |
| // default group: | |
| KConfigGroup gconfig = KGlobal::config()->group(""); | |
| // or custom: | |
| KConfigGroup config = KGlobal::config()->group( GeneralOptionsConfigGrou p); | |
| // | |
| // Note the dot instead of "->" | |
| v = (unsigned int) config.readEntry( .. ) | |
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| QStringList::split(',', recordStr); | |
| ==> | |
| recordStr.split(,); | |
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| QVBox *vbox = new QVBox; | |
| QPushButton *child1 = new QPushButton(vbox); | |
| ==> | |
| QWidget *vbox = new QWidget; | |
| QPushButton *child1 = new QPushButton; | |
| // | |
| QVBoxLayout *layout = new QVBoxLayout; | |
| layout->addWidget(child1); | |
| vbox->setLayout(layout); | |
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| </code> | |
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