virtual slot void QDialog:: done (int r) Closes the dialog and sets its result code to r. The finished signal will emit r; if r is QDialog::Accepted or QDialog::Rejected, the accepted or the rejected signals will also be emitted, respectively.
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Hello.
I want to write a small tool and like to separate the business logic from the GUI so I can easily make and use different GUIs.
Therefore I've made a class which contains the business logic called AppCore. The GUI class(es) are called MainWindow.
My idea is to pass the constructor of the AppCore a reference to the GUI so the constructor of the AppCore can connect the AppCore singals to the GUI slots and vice versa.
But to make it flexible I don't want to have the actual GUI as type of the parameter but an Interface (pure virtual class) called IGui which the GUI inherits from.
@
int main(int argc, char *argv[])
{
QApplication a(argc, argv);
AppCore *appCore;
MainWindow w;
appCore = new AppCore(&w);
w.show();
R s lotto results today. return a.exec();
}
class IGui
{
public slots:
virtual void slot() = 0;
Qt Signal Emit
};
class MainWindow : public QMainWindow, public IGui
{
Q_OBJECT
};
class AppCore : public QObject
{
Q_OBJECT
}
AppCore::AppCore(IGui *gui, QObject *parent) :
QObject(parent)
{
connect(gui, SIGNAL(signal()),
this, SLOT(onSingal()));
}@
But when I try to compile I get errors:
[quote]
AppCore.cpp: In constructor 'AppCore::AppCore(IGui*, QObject*)':
AppCore.cpp:9: error: no matching function for call to 'AppCore::connect(IGui*&, const char [10], AppCore* const, const char [12])'
c:QtSDKDesktopQt4.8.1mingwincludeQtCore/qobject.h:204: note: candidates are: static bool QObject::connect(const QObject*, const char*, const QObject*, const char*, Qt::ConnectionType)
c:QtSDKDesktopQt4.8.1mingwincludeQtCore/qobject.h:217: note: static bool QObject::connect(const QObject*, const QMetaMethod&, const QObject*, const QMetaMethod&, Qt::ConnectionType)
c:QtSDKDesktopQt4.8.1mingwincludeQtCore/qobject.h:337: note: bool QObject::connect(const QObject*, const char*, const char*, Qt::ConnectionType) const
AppCore.cpp:12: error: no matching function for call to 'AppCore::connect(AppCore* const, const char [10], IGui*&, const char [8])'
c:QtSDKDesktopQt4.8.1mingwincludeQtCore/qobject.h:204: note: candidates are: static bool QObject::connect(const QObject*, const char*, const QObject*, const char*, Qt::ConnectionType)
c:QtSDKDesktopQt4.8.1mingwincludeQtCore/qobject.h:217: note: static bool QObject::connect(const QObject*, const QMetaMethod&, const QObject*, const QMetaMethod&, Qt::ConnectionType)
c:QtSDKDesktopQt4.8.1mingwincludeQtCore/qobject.h:337: note: bool QObject::connect(const QObject*, const char*, const char*, Qt::ConnectionType) const[/quote]
Qt Slot Virtual Override
If I let IGui derive from QObject I get this errors:
[quote]
releasemoc_MainWindow.cpp: In static member function 'static void MainWindow::qt_static_metacall(QObject*, QMetaObject::Call, int, void**)':
releasemoc_MainWindow.cpp:52: error: 'QObject' is an ambiguous base of 'MainWindow'
releasemoc_MainWindow.cpp: In member function 'virtual const QMetaObject* MainWindow::metaObject() const':
releasemoc_MainWindow.cpp:78: error: 'QObject' is an ambiguous base of 'MainWindow'
releasemoc_MainWindow.cpp:78: error: 'QObject' is an ambiguous base of 'MainWindow'
releasemoc_MainWindow.cpp: In member function 'virtual int MainWindow::qt_metacall(QMetaObject::Call, int, void**)':
releasemoc_MainWindow.cpp:98: error: 'QObject' is an ambiguous base of 'MainWindow'
releasemoc_MainWindow.cpp: In member function 'virtual void MainWindow::signal()':
releasemoc_MainWindow.cpp:107: error: 'QObject' is an ambiguous base of 'MainWindow'
[/quote]
Qt Slots Virtual Poker
But to make it flexible I don't want to have the actual GUI as type of the parameter but an Interface (pure virtual class) called IGui which the GUI inherits from.
@
int main(int argc, char *argv[])
{
QApplication a(argc, argv);
AppCore *appCore;
MainWindow w;
appCore = new AppCore(&w);
w.show();
R s lotto results today. return a.exec();
}
class IGui
{
public slots:
virtual void slot() = 0;
Qt Signal Emit
};
class MainWindow : public QMainWindow, public IGui
{
Q_OBJECT
};
class AppCore : public QObject
{
Q_OBJECT
}
AppCore::AppCore(IGui *gui, QObject *parent) :
QObject(parent)
{
connect(gui, SIGNAL(signal()),
this, SLOT(onSingal()));
}@
But when I try to compile I get errors:
[quote]
AppCore.cpp: In constructor 'AppCore::AppCore(IGui*, QObject*)':
AppCore.cpp:9: error: no matching function for call to 'AppCore::connect(IGui*&, const char [10], AppCore* const, const char [12])'
c:QtSDKDesktopQt4.8.1mingwincludeQtCore/qobject.h:204: note: candidates are: static bool QObject::connect(const QObject*, const char*, const QObject*, const char*, Qt::ConnectionType)
c:QtSDKDesktopQt4.8.1mingwincludeQtCore/qobject.h:217: note: static bool QObject::connect(const QObject*, const QMetaMethod&, const QObject*, const QMetaMethod&, Qt::ConnectionType)
c:QtSDKDesktopQt4.8.1mingwincludeQtCore/qobject.h:337: note: bool QObject::connect(const QObject*, const char*, const char*, Qt::ConnectionType) const
AppCore.cpp:12: error: no matching function for call to 'AppCore::connect(AppCore* const, const char [10], IGui*&, const char [8])'
c:QtSDKDesktopQt4.8.1mingwincludeQtCore/qobject.h:204: note: candidates are: static bool QObject::connect(const QObject*, const char*, const QObject*, const char*, Qt::ConnectionType)
c:QtSDKDesktopQt4.8.1mingwincludeQtCore/qobject.h:217: note: static bool QObject::connect(const QObject*, const QMetaMethod&, const QObject*, const QMetaMethod&, Qt::ConnectionType)
c:QtSDKDesktopQt4.8.1mingwincludeQtCore/qobject.h:337: note: bool QObject::connect(const QObject*, const char*, const char*, Qt::ConnectionType) const[/quote]
Qt Slot Virtual Override
If I let IGui derive from QObject I get this errors:
[quote]
releasemoc_MainWindow.cpp: In static member function 'static void MainWindow::qt_static_metacall(QObject*, QMetaObject::Call, int, void**)':
releasemoc_MainWindow.cpp:52: error: 'QObject' is an ambiguous base of 'MainWindow'
releasemoc_MainWindow.cpp: In member function 'virtual const QMetaObject* MainWindow::metaObject() const':
releasemoc_MainWindow.cpp:78: error: 'QObject' is an ambiguous base of 'MainWindow'
releasemoc_MainWindow.cpp:78: error: 'QObject' is an ambiguous base of 'MainWindow'
releasemoc_MainWindow.cpp: In member function 'virtual int MainWindow::qt_metacall(QMetaObject::Call, int, void**)':
releasemoc_MainWindow.cpp:98: error: 'QObject' is an ambiguous base of 'MainWindow'
releasemoc_MainWindow.cpp: In member function 'virtual void MainWindow::signal()':
releasemoc_MainWindow.cpp:107: error: 'QObject' is an ambiguous base of 'MainWindow'
[/quote]
Qt Slots Virtual Poker
Qt Public Slots Virtual
How do I have to do it right?
