qthread

问题 I'm using pyside but (I think) is a generic Qt question. I know that QThread implementation calls ._exec() method so we should have an event loop on a started QThread. This way we can use QTimer on that thread (I've done this and it works perfectly). My problem is when QWaitCondition is also used, I'd like to have a "consumer" thread with a infinite loop waiting to be notify (from producers) on the QWaitCondition. The problem I have is that with this design I cannot use QTimer inside the

问题 Hi i have send to my Thread worker link to GUI and update GUI info directly from QThread. Like here: class Worker(QThread): def __init__(self, ui): QThread.__init__(self) self.running = False self.ui = ui def run(self): self.running = True while self.running: info = self.check_info() rows = len(info) self.ui.tableWidget.setRowCount(rows) self.ui.tableWidget.setColumnCount(6) ... In main QMainWindow i just add def __init__(self, parent=None): ....... self.myworker = Worker(self.ui) ..... Is

问题 After much testing and changes to my QT application, Visual Leak Detector identified the source of a pesky leak (8 bytes). VLD reported the QT application is clean except for a QThread* pointer. A bit of implementation background: the application is modelled as a hybrid of solution by Jeffrey Holmes, Bulk download of web pages using Qt. Thanks to Jeffrey for the earlier solution! Questions: Why is QThread* not destroying itself when the worker thread completed its work? How can I force the

问题 After i click the button, the form become unresponsive until the parsing function finish its work. I'd like to move searchAll function to thread. I did read several answers to similar questions, but i didn't understand how. class MyForm(QDialog): def __init__(self): super().__init__() self.ui = Ui_Dialog() self.ui.setupUi(self) self.ui.buttonOK.clicked.connect(self.searchAll) self.show() def searchAll(self): sID = self.ui.txtSellerID.text() sUrl = "https://removed.com/" + sID + "/p/?section=2

问题 I want to access the parent class widgets in the QThread class This line gives hangs GUI "Example().setWindowTitle("Window")" How can I do that? class Example(QWidget): def __init__(self): super().__init__() self.myclass2 = myclass2() self.myclass2.start() self.initUI() def initUI(self): self.setGeometry(300, 300, 300, 220) self.setWindowTitle('Icon') self.setWindowIcon(QIcon('web.png')) self.show() class myclass2(QThread): def __init__(self, parent=None): super(myclass2, self).__init__

问题 I have an implementation of a BackgroundTask object that looks like the following: class BackgroundTask(QObject): ''' A utility class that makes running long-running tasks in a separate thread easier :type task: callable :param task: The task to run :param args: positional arguments to pass to task :param kawrgs: keyword arguments to pass to task .. warning :: There is one **MAJOR** restriction in task: It **cannot** interact with any Qt GUI objects. doing so will cause the GUI to crash. This

问题 I need to Start immediately and stop then a QThread extended class from Qml File. Is there any solution for that? here is my class : class SerialManager : public QThread { Q_OBJECT public: CircularList<unsigned char> buffer_[2]; signals: void dataReady(short *value,int len,unsigned short sample); protected: void run(); }; 回答1: if you have SerialManager like this: class SerialManager : public QThread { Q_OBJECT public: CircularList<unsigned char> buffer_[2]; signals: void dataReady(short

问题 Pretty new to threading and I have this QList that the threads share between them. They all have their own space that they can work on, and the GUI (the model/view) access this list constantly. I then get this crash which points to QDataList.size(). The debugging doesn't really help me since I never come across this issue if I step through the code and when I'm trying to what qList that's crashing, there's no info available. So, my question is: Is it possible to get the Qlists size and read

问题 I implemented a class that can write data to a serial port via a QQueue and read from it by a slot. I use QAsyncSerial for this which in turn uses boost::asio with a callback. The class is moved to a thread and its start() method is executed when the QThread emits "started()" The problem is that I dequeue the QQueue in the start()-method using forever {} and a QWaitCondition. While this is running (which obviously runs forever) the slot connected to the dataReceived signal of QAsyncSerial can

问题 I'm new to Qt so please excuse the simplicity of the question but I'm a bit confused on the Qt threading. Let's say I have 3 threads: the main default GUI thread, and 2 threads of my own creation (called WorkerThread). Each of my WorkerThreads inherits from QThread and are permanent threads that every so often wake up and send data out a socket and post status on a GUI element. How is the best way to 1) allow the GUI thread to set data in the WorkerThread object that the WorkerThread thread