非主线程中的QApplication

问题描述

我需要exec（）一个QApplication在不是主要的线程（我的GUI必须是可以在运行时动态加载和卸载的插件，所以我没有访问主线程）。有没有人知道一个（相对）无痛的方式来攻击Qt的限制以外的主要的启动QApplication？

我正在使用gcc4在C ++中使用C ++开发Qt4。 3.4。

解决方案

如果你正在使用QThread，那么你已经有正常的Qt事件循环，只需运行exec （）函数。虽然您无法使用主线程之外的GUI对象，但您仍然可以通过排队的信号/插槽连接与它们交互。也许你可以尝试存储指向主线程QThread对象的指针，并调用QObject :: moveToThread（）将你的GUI对象移动到主线程，而不是把QApplication移动到另一个线程。

我认为尝试使用不同类型的hacks和kluges来防范工具包并不是个好主意。

I need to exec() a QApplication in a thread that is not main (my GUIs must be plugins that can be dynamically loaded and unloaded at runtime, so I have no access to the main thread). Does anyone know of a (relatively) painless way to hack around Qt's restriction against starting QApplication outside of main?

I'm developing in Linux with Qt4 in C++ using gcc4.3.4.

解决方案

If you are using QThread then you already have normal Qt event loop and can just run exec() inside QThread::run() function. While you can't work with GUI objects outside of the main thread you still can interact with them through queued signal/slot connections. Maybe you can try to store pointer to the main thread QThread object and call QObject::moveToThread() to move your GUI objects to the main thread instead of moving QApplication into another thread.

I think it's not really good idea to try to go against toolkit with different kind of hacks and kluges.

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