2011年10月8日 · I'm wondering how to develop visually modern, with attractive GUI applications in QT. When I run QT Creator and start new project, the GUI looks very basic and "pure", just like simple win32 apps. But look for example at Allegorithmic Substance Designer 2, where GUI looks somehow similar to WPF. There are many other applications with nice ...

2015年7月15日 · I have a Qt GUI application running on Windows that allows command-line options to be passed and under some circumstances I want to output a message to the console and then quit, for example: int ...

Each menu list item, when selected shows different forms. I would like to create another application that would test this QT application's menu if all the menu item selected are working and are showing the forms they're supposed to show. I'm a beginner in QT, so any help as to what would be the best approach would be much appreciated. Thanks...

2017年8月7日 · Basically, Qt has one thread dealing with the GUI (typically the main thread). Any objects specific to this thread will be blocked by GUI work. You need to keep the GUI outside of your interacting partners. To be more specific, your Engine object resides in the GUI/main thread.

2012年6月15日 · Qt's windows integrate with the native event loop, and everything is good on that front. You do need to call QCoreApplication::processEvents once. It will integrate the current application instance into the windows event loop, and that's it.

2014年5月11日 · As mentioned in Qt documentation, each program has one "main thread" (also known as the "GUI thread") when it is started. The Qt GUI must run in this thread. All widgets and several related classes, for example QPixmap, don't work in secondary threads. So you can not have GUI components in any worker thread in anyway.

2020年3月3日 · I'm currently updating an existing codebase designed to be used with a GTK GUI to QT, so that it can implement multi threading, as the functions take hours to complete. This codebase makes frequent calls to a function display(std::string), for the purpose of updating a text display widget. I redefined this function for the new QT version:

2014年10月27日 · I have an application that when run through terminal, the user has the option between command-line mode or GUI mode. There doesn't seem to be any output to the console at all when using std::cout . std::cout statements don't work in the main event loop.

def test_hello(qtbot): widget = HelloWidget() qtbot.addWidget(widget) # click in the Greet button and make sure it updates the appropriate label qtbot.mouseClick(widget.button_greet, QtCore.Qt.LeftButton) assert widget.greet_label.text() == "Hello!"

2012年7月11日 · On Qt 4.8 and newer, the QMutex implementation got a nice speedup, so the fact that each signal emission results in locking of the queue mutex is not likely to be a problem. Alas, the events need to be allocated on the heap in the worker thread, and then deallocated in the GUI thread.