Qt No Such Slot Error
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Qobject::connect: No Such Slot
Overflow Community Stack Overflow is a community of 6.2 million programmers, just like you, helping each other. Join them; it only takes a minute: Sign up QT “No such slot” Error [duplicate] up vote 0 down vote favorite This question already has an answer here: When should Q_OBJECT be used? object connect no such slot qwidget 4 answers This is the part of my Class definition/.hpp file: class RenderGraphFrame : public QGLWidget { public: RenderGraphFrame(QWidget *parent); private slots: void PrevButton(); void NextButton(); private: void draw(); QWidget *p_parent; bool ButtonsInited; QPushButton *nextButton; QPushButton *prevButton; } And this are the related source parts: RenderGraphFrame::RenderGraphFrame(QWidget *parent) : QGLWidget(QGLFormat(/*QGL::SampleBuffers*/), parent) { p_parent = parent; /* ... */ } void RenderGraphFrame::draw() { if (ButtonsInited == false) { bool tmpttest_success; nextButton = parent->findChild
here for a quick overview of the site Help Center Detailed answers to any questions you might have Meta Discuss the workings and policies of this site About Us qt undefined reference to vtable for Learn more about Stack Overflow the company Business Learn more about hiring developers q_object macro or posting ads with us Stack Overflow Questions Jobs Documentation Tags Users Badges Ask Question x Dismiss Join the Stack qt slot Overflow Community Stack Overflow is a community of 6.2 million programmers, just like you, helping each other. Join them; it only takes a minute: Sign up Qt connect “no such slot” when slot http://stackoverflow.com/questions/31562023/qt-no-such-slot-error definitely does exist up vote 4 down vote favorite Qt v4.8.0, VC2010 compiler I have a QMainWindow based class and I'm trying to send it signals involving QUuid However, every time I run it I get the errors: Object::connect: No such slot MainWindow::on_comp_connected(QUuid) in ..\..\src\mainwindow.cpp:143 Object::connect: (receiver name: 'MainWindow') It's driving me potty as the slot definitely does exist (it's in the moc_) class MainWindow : public http://stackoverflow.com/questions/10656510/qt-connect-no-such-slot-when-slot-definitely-does-exist QMainWindow { Q_OBJECT // SNIP private typedefs public: MainWindow(QWidget *parent = 0, Qt::WFlags flags = 0); ~MainWindow(); // SNIP public methods signals: void testSendQuuid(const QUuid &qcid); public slots: void on_comp_connected(const QUuid &qcid); private: // SNIP private parts QOpenAcnController *acnInt; // This is where the signal comes from }; At the end of the MainWindow constructor (the line 143 mentioned) I have: connect(acnInt, SIGNAL(callback_comp_connected(QUuid)), this, SLOT(on_comp_connected(QUuid))); Given that the slot is definitely there in the moc_mainwindow.cpp (I checked, it's slot #1), what on earth could be stopping the connection happening? If I try to connect the testSendQuuid(QUuid) signal to the slot, I get no such signal and no such slot as well. I cannot for the life of me figure out why Qt is denying the existence of a slot that is most definitely there! qt signals-slots share|improve this question asked May 18 '12 at 16:38 Richard1403832 110116 Did you already try a clean, Run qmake, build sequence? Sometimes the Qt-generated make file gets confused. –Dave Mateer May 18 '12 at 17:09 Yes indeed, first thing I tried! I've had a few occasions where qmake or moc got confused (usually when promoting a class t
download a browser that supports JavaScript, or enable it if it's disabled (i.e. NoScript). Home Qt Development General and https://forum.qt.io/topic/23597/solved-no-such-slot-error Desktop [solved] "No such slot" error [solved] "No such slot" error This topic has been deleted. Only users with topic management privileges can see it. bio120 last edited https://supportforums.blackberry.com/t5/Native-Development/Object-connect-No-such-slot-error/td-p/2126245 by Hi all. I have a problem, that I can't solve. I have class MainWindow and I have two slots in private slots section: @ void getData(QUrl no such url, QScrollArea *object); void proccessData(QNetworkReply *pReply, QScrollArea *object);@ There are source codes of this slots: @void MainWindow::getData(QUrl url, QScrollArea object) { static QNetworkAccessManager am; QNetworkRequest request(url); QNetworkReply reply = am.get(request); connect(reply,SIGNAL(finished()), this,SLOT(proccessData(reply,object))); } void MainWindow::proccessData(QNetworkReply *pReply, QScrollArea object) { QLabel label = new QLabel; label->setText(pReply->readAll()); object->setWidget(label); }@ My app compiles without any errors, but when I no such slot "getData" calls "processData", I see that in my debug window @Object::connect: No such slot MainWindow::proccessData(reply,object) in ..\MainWindow.cpp:166@ Also I have QScrollArea without any text. Please, help me Reply Quote 0 BelenMuñoz last edited by Maybe the problem is the connect inside the getData slot. You could try to put it in constructor. Hope it helps you. Regards. Me casé con un enano pa jartarme de reí. Reply Quote 0 MuldeR last edited by Your slot function is defined as @proccessData(QNetworkReply*, QScrollArea*)@ But you try to connect to, so indeed there is no such slot! @SLOT(proccessData(reply,object))@ You need to change that to: @SLOT(proccessData(QNetworkReply*, QScrollArea*))@ Also you may consider changing your function's signature to: @proccessData(const QNetworkReply &reply const QScrollArea &area)@ My OpenSource software at: http://muldersoft.com/ Qt v4.8.6 MSVC 2013, static/shared: http://goo.gl/BXqhrS Go visit the coop: http://youtu.be/Jay... Reply Quote 0 bio120 last edited by [quote author="BelenMuñoz" date="1359043115"]Maybe the problem is the connect inside the getData slot. You could try to put it in constructor. Hope it helps you. Regards.[/quo
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