[Solved] No such signal - My own class



  • Dear all,

    I created my own PushButton to receive a signal when my button get focus. Please see code below:

    @
    class MyPushButton : public QPushButton
    {
    Q_OBJECT

    public:
    MyPushButton(QWidget *parent = 0);

    signals:
    void getFocus();

    protected:
    void focusInEvent (QFocusEvent * event);

    };

    MyPushButton::MyPushButton(QWidget *parent) :
    QPushButton(parent)
    {
    }

    void MyPushButton::focusInEvent (QFocusEvent * event)
    {
    emit getFocus();
    QPushButton::focusInEvent(event);
    }

    @

    And in the main application I connect the signal to the slot.

    @
    connect(ui->btn1, SIGNAL(gotFocus()), this, SLOT(gotFocus1()));
    @

    When I start the application, I receive the following message:

    @
    Object::connect: No such signal MyPushButton::gotFocus() in ../page1.cpp:26
    Object::connect: (sender name: 'btn1')
    Object::connect: (receiver name 'Page1')
    @

    So, what is wrong in my code? Any ideas?

    I promoted my QPushButton to MyPushButton.

    Thanks a lot.



  • Typo: Error is for gotFocus. Signal name is getFocus.



  • Good Programming Practice: If you are using Visual Studio, let intellisense type the signal out as
    @connect(sender, SIGNAL(sender->signalName())....@
    Once you get it filled, delete "sender->". This way you can never get the signal name typed incorrectly.



  • [quote author="iunknwn" date="1289581834"]Good Programming Practice: If you are using Visual Studio, let intellisense type the signal out as
    Once you get it filled, delete "sender->". This way you can never get the signal name typed incorrectly.
    [/quote]

    or use QtCreator, it shows available signals when you write code.



  • Thanks a lot, I could not see my mistake.


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