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qt qobject error Abbott, Texas

If the initialization takes significant time, the progress should be displayed on the loading bar. Old syntax Qt5 continues to support the old string-based syntax for connecting signals and slots defined in a QObject or any class that inherits from QObject (including QWidget) connect(sender, SIGNAL (valueChanged(QString,QString)), This is not one of my classes but part of an open source project that is licencsed under GNU. Please download a browser that supports JavaScript, or enable it if it's disabled (i.e.

Browse other questions tagged c++ qt qtcore qt-signals moc or ask your own question. Other posts about running REBUILD ALL are incorrect...on it's own that will NOT run qmake. Disconnects all signals in this object from receiver's method. In that case, findChildren() should be used.

If not, only the specified signal is disconnected. See also destroyed() and QPointer. [signal] void QObject::destroyed(QObject *obj = Q_NULLPTR) This signal is emitted immediately before the object obj is destroyed, and can not be blocked. More information about using auto-connection with Qt Designer is given in the Using a Designer UI File in Your Application section of the Qt Designer manual. it fixed the problem! –Donotalo Jan 24 '11 at 14:50 3 Spot on answer - covered my case where the object did not originally belong to the Qt meta object

Note: This function is thread-safe See also disconnect(). [static] QMetaObject::Connection QObject::connect(const QObject *sender, PointerToMemberFunction signal, const QObject *receiver, PointerToMemberFunction method, Qt::ConnectionType type = Qt::AutoConnection) This function overloads connect(). To make user-visible text translatable, it must be wrapped in calls to the tr() function. Warning: This function violates the object-oriented principle of modularity. See also deleteLater().

Browse other questions tagged c++ qt linker-error vtable or ask your own question. Using 'dynamic_cast' compiles ok. The remaining code compiled without errors. It is much faster than qobject_cast(obj) or obj->inherits("QWidget").

Omitting the name argument causes all object names to be matched. In the common C++ ABI, this TU is the one where the key function of the class is implemented in, where the key function is the first virtual member function that If method is 0, it disconnects anything that is connected to receiver. It's only the most common way of doing it.

People Assignee: Thiago Macieira Reporter: Hans Müller Votes: 0 Vote for this issue Watchers: 3 Start watching this issue Dates Created: 26/Apr/12 9:10 PM Updated: 30/Jun/12 6:40 AM Resolved: 27/Apr/12 12:12 Argument can be by typedefs or with different namespace specifier, and it works. Returns a handle to the connection that can be used to disconnect it later. I have two classes A and B, which both inherits from QItemDelegate.

Example: MyWindow::MyWindow() { QLabel *senderLabel = new QLabel(tr("Name:")); QLabel *recipientLabel = new QLabel(tr("Name:", "recipient")); ... It is probably also a bad idea to make the timer member public. See also timerEvent(), killTimer(), and QTimer::singleShot(). Note: This function is thread-safe bool QObject::disconnect(const QObject *receiver, const char *method = Q_NULLPTR) const This function overloads disconnect().

There is no need to create a seperate (empty) .cpp file and moc does not modify or insert code to any files. Saves you some time there. Warning: This function is called from the thread which performs the disconnection, which may be a different thread from the thread in which this object lives. But I was addressing this situation: @ #include "mainwindow.h" #include class MyClass: public QObject { Q_OBJECT public: MyClass(QObject *parent) : QObject(parent) {} }; int main(int argc, char *argv[]) { QApplication

Therefore, virtual inheritance of QObject when you want to use the meta object does not make sense. I'm using CMake instead of qmake, and I see this error pretty frequently; it's very frustrating to understand the basic C++ vtable information and still not be able to figure out Command-Line Options Here are the command-line options supported by the moc: OptionDescription -oWrite output to rather than to standard output. -f[]Force the generation of an #include statement in the output. If you pass the Qt::UniqueConnection type, the connection will only be made if it is not a duplicate.

In Qt 4.4 and earlier, this was the preferred way to pass comments to translators. The search is performed recursively, unless options specifies the option FindDirectChildrenOnly. Traveling Pumpkin Problem How to tell where file is going to be saved? See also parent() and children().

class MyClass : public QObject { Q_OBJECT Q_PROPERTY(Priority priority READ priority WRITE setPriority) Q_ENUMS(Priority) public: enum Priority { High, Low, VeryHigh, VeryLow }; MyClass(QObject *parent = 0); ~MyClass(); void setPriority(Priority priority) Reply Quote 0 Loading More Posts 9 Posts 9512 Views Reply Reply as topic Log in to reply 1 / 1 We bake cookies in your browser for a better experience. See also Meta-Object System, Signals and Slots, and Qt's Property System. © 2016 The Qt Company Ltd. Asynchronous made easier With C11 it is possible to keep the code inline void doYourStuff(const QByteArray &page) { QTcpSocket *socket = new QTcpSocket; socket->connectToHost("qt.io", 80); QObject::connect(socket, &QTcpSocket::connected, [socket, page] () {

See also installEventFilter(), eventFilter(), and event(). [protected] QObject *QObject::sender() const Returns a pointer to the object that sent the signal, if called in a slot activated by a signal; otherwise it Recommended off-line reading: The Foundations of Qt Development (ISBN: 1-59059-831-8) Reply With Quote 25th April 2011,05:29 #8 OnlyK View Profile View Forum Posts View Blog Entries View Articles Beginner Join Date This fixed my similar problem. Here is an example of illegal syntax: class SomeClass : public QObject { Q_OBJECT public slots: void apply(void (*apply)(List *, void *), char *); // WRONG }; You can work around

Empty lines are ignored. However, getting access to the sender might be useful when many signals are connected to a single slot. Any code surrounded by #ifndef Q_MOC_RUN ... #endif is skipped by the moc. Can you move a levitating target 120 feet in a single action?

Since doing so I get "signal undefined reference error for 'vtable for CLICommand'" error on the class line below: // File clicommand.h #include #include #include #include "telnetthread.h" class Note that entering and leaving a new event loop (e.g., by opening a modal dialog) will not perform the deferred deletion; for the object to be deleted, the control must return I had to remove my .user file and touch the *.pro file as @Donotalo suggested. Then, on the next 'Build all' action, Qt Creator regenerates it, such that the Q_OBJECT change related link error goes away. –maxschlepzig Mar 30 '15 at 9:34 add a comment| Your

Last edited by stargazer; 11th January 2011 at 17:11. See installEventFilter() and eventFilter() for details.