CopperSpice Forum

Hi barbara,
how do I connect two overloaded signals to my application?

Example 1:
class QComboBox:{

GUI_CS_SIGNAL_1(Public, void currentIndexChanged(int index))
GUI_CS_SIGNAL_OVERLOAD(currentIndexChanged, (int), index)

GUI_CS_SIGNAL_1(Public, void currentIndexChanged(const QString &text))
GUI_CS_SIGNAL_OVERLOAD(currentIndexChanged, (const QString &), text)
};
Example 2:
class QAbstractSocket:{

SocketError error() const;

NET_CS_SIGNAL_1(Public, void error(QAbstractSocket::SocketError socketError))
NET_CS_SIGNAL_OVERLOAD(error, (QAbstractSocket::SocketError), socketError)
};

Here is an example to help explain how this works. The valueChanged() signal for QSpinBox has two overloads.

When calling connect() using method pointers, the second parameter is a pointer to the signal and the fourth parameter is a pointer to the slot. If either the signal or the slot is overloaded additional syntax will be required so the compiler knows which overload to use. By adding the cs_mp_cast<int> syntax the compiler now has enough information to select the correct overload. In this example the overload which accepts an int data type will be used.
You may want to look over Journal entry #8 where we discussed this information.
https://journal.copperspice.com/?p=705

Barbara

Thank you for your answer.

[ Moved new questions to another topic "Migrating VTK" ]