Compatibility Members for QApplication

The following class members are part of the Qt compatibility layer. We advise against using them in new code.

• QApplication class reference

Public Functions

QApplication(int & argc, char ** argv, bool GUIenabled, int _internal = ApplicationFlags)

• 1 public function inherited from QGuiApplication

Static Public Members

Qt::LayoutDirection	keyboardInputDirection()
QLocale	keyboardInputLocale()
void	setGraphicsSystem(const QString &)

• 1 static public member inherited from QGuiApplication
• 1 static public member inherited from QCoreApplication

Member Function Documentation

QApplication::QApplication(int & argc, char ** argv, bool GUIenabled, int _internal = ApplicationFlags)

Constructs an application object with argc command line arguments in argv.

Warning: The data referred to by argc and argv must stay valid for the entire lifetime of the QApplication object. In addition, argc must be greater than zero and argv must contain at least one valid character string.

The following example shows how to create an application that uses a graphical interface when available.

 int main(int argc, char **argv)
 {
 #ifdef Q_WS_X11
     bool useGUI = getenv("DISPLAY") != 0;
 #else
     bool useGUI = true;
 #endif
     QApplication app(argc, argv, useGUI);

     if (useGUI) {
        // start GUI version
        ...
     } else {
        // start non-GUI version
        ...
     }
     return app.exec();
 }

Qt::LayoutDirection QApplication::keyboardInputDirection() [static]

QLocale QApplication::keyboardInputLocale() [static]

Returns the current keyboard input locale. Replaced with QInputMethod::locale()

This function was introduced in Qt 4.2.

void QApplication::setGraphicsSystem(const QString &) [static]