我有一个英语和阿拉伯语两种语言的程序,名为app_en和app_ar.我可以使用QApplication中的installTranslator在main中开始翻译程序.我的问题是如何通过推动QAction来改变程序的语言?
这是我的尝试:
我将我的语言QAction连接到一个插槽,该插槽获取用户选择的语言,然后将其保存并转到另一个功能来安装翻译.这一切都发生在QMainWindow之外.
void MainCore::GetAndSaveLanguage(bool){
//Getting the language the users wants.
bool OKPressed;
QString Language = QInputDialog::getItem(NULL, InputDialogString, InputDialogString + ":", Languages, 0, false, &OKPressed)
.remove(QRegExp("*(", Qt::CaseSensitive, QRegExp::Wildcard)).remove(')');
//Checking if ok button was pressed.
if(OKPressed){
//Saving the languages.
Settings->beginGroup("Settings");
Settings->setValue("Language", Language);
Settings->endGroup();
//Update language.
UpdateTranslations(Language);
}
}
void MainCore::UpdateTranslations(QString Language){
//Setting the translation for the qt widgets.
QTranslator QtTranslator;
QtTranslator.load("qt_" + Language, QLibraryInfo::location(QLibraryInfo::TranslationsPath));
QApplication::instance()->installTranslator(&QtTranslator);
//Setting the translation for the program.
QTranslator AppTranslator;
AppTranslator.load("app_" + Language, ":/translations");
QApplication::instance()->installTranslator(&AppTranslator);
}
我还在QMainWindow上有一个函数,它设置屏幕的所有文本,如下所示:
void Window::SetText(){
Menu->setTitle(tr("File"));
...
}
在构造窗口和changeEvent函数时调用它:
void Window::changeEvent(QEvent *event){
if(event->type() == QEvent::LanguageChange){
SetText();
}else{
QWidget::changeEvent(event);
}
}
最佳答案 问题是你在堆栈中分配你的QtTranslator(相同的AppTranslator),它在UpdateTranslations结束时超出了范围
void MainCore::UpdateTranslations(QString Language)
{
//Setting the translation for the qt widgets.
QTranslator QtTranslator;
QtTranslator.load("qt_" + Language,QLibraryInfo::location(QLibraryInfo::TranslationsPath));
QApplication::instance()->installTranslator(&QtTranslator); // this is a bad reference
...
} // QtTranslator will go out of scope
只要您的应用程序正在运行,您就需要QtTranslator才能生存.所以一种选择是在堆中分配它
QTranslator * QtTranslator = new QTranslator;
并且您需要保留对QtTranslator的引用以便以后删除它…