QT4:如何重新启动应用程序?重置设置?

发布于 2024-10-19 11:47:59 字数 190 浏览 7 评论 0原文

1.) 我想重新启动我的 QT4 应用程序。只是同一应用程序的正常关闭和启动。

2.) 为什么?好吧,我需要一个选项来“重置”一切。重新启动应用程序似乎是最简单的方法。问题是,有很多课程和一切。我没有时间将它们的每个设置恢复为标准,每个文本框,小部件都需要清除...我知道应用程序重新启动不是最好的方法,您认为还有其他方法吗?

谢谢

1.) I would like to restart my QT4 application. Just a normal shutdown and start of the same application.

2.) Why? Well i need an Option to "reset" everything. To restart the application seems to be the easiest way to do this. The problem is, that there are a LOT of classes and everything. I dont have the time to put every setting of them back to standard, every textBox, Widget to clear... I Know application restart is not the best way, what do you think is there another way?

Thank You

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评论(6

骷髅 2024-10-26 11:48:00

要重新启动应用程序,您可以在退出进程后使用 startDetached

#include <QApplication>
#include <QProcess>

...

// restart the app:
qApp->quit();
QProcess::startDetached(qApp->arguments()[0], qApp->arguments());

For restarting an application you can use startDetached after quiting the process:

#include <QApplication>
#include <QProcess>

...

// restart the app:
qApp->quit();
QProcess::startDetached(qApp->arguments()[0], qApp->arguments());
妞丶爷亲个 2024-10-26 11:48:00

1) 您可以运行脚本,安排操作系统稍后启动您的应用程序。

2)编写一个单独的类,其中包含所有应用程序设置。需要时重置。

1) You can run a Script, Schedule the OS to start your app later.

2) Write a separate class which contains all your application Settings. Reset whenever required.

半边脸i 2024-10-26 11:48:00

有趣的请求。只需保留“重新启动”的退出代码并执行类似(未经测试)的操作:

int main(int argc, char **argv)
{
 QApplication app(argc, argv);
 ...
 int ret = app.exec();
 if (ret == EXIT_RESTART) {
   ::execve(...);
 }
 return ret;
}

然后您可以在任何地方调用 QApplication::exit(EXIT_RESTART) ,您应该可以开始了。或者使用包装脚本来执行相同的操作。 (如果您的应用程序需要任何命令行参数,请确保在这两种情况下都能令人满意地处理命令行参数。)

更简洁的方法是将所有需要重置的内容连接到同一信号。

Funny request. Just reserve an exit code for "restart" and do something like (untested):

int main(int argc, char **argv)
{
 QApplication app(argc, argv);
 ...
 int ret = app.exec();
 if (ret == EXIT_RESTART) {
   ::execve(...);
 }
 return ret;
}

Then you can just call QApplication::exit(EXIT_RESTART) anywhere and you should be good to go. Or use a wrapper script to do the same. (Make sure in both cases that you handle command line arguments satisfactorily if you app takes any.)

A cleaner approach would be to connect all the things that need to be reset to the same signal.

り繁华旳梦境 2024-10-26 11:48:00

您可以删除这些类并在同一 QApplication 下的 main() 中创建新类

you could delete the classes and create new ones in main() under the same QApplication

梦晓ヶ微光ヅ倾城 2024-10-26 11:48:00

在这种情况下,明智的做法是将创建/初始化小部件等的所有内容放在单个函数中(当然,它可以调用子函数)。当您需要重置所有内容时,只需调用它即可。根据具体的实现,您可能需要首先删除/取消初始化这些内容。

The sane thing to do in such a case is to put all the stuff that creates/initializes widgets, etc., in a single function (of course, it can call sub-functions). When you need to reset everything, simply call it. Depending on the exact implementation, you may need to delete/un-initialize the stuff first.

别忘他 2024-10-26 11:48:00

该方法适用于 PyQt。我编写它是为了擦除所有设置并使用干净的设置重新启动应用程序。 application_main 是主方法,clearSettings 是清除设置的槽。

class GuiMain

    #Most of implementation missing

    def clearSettings(self):
        """Deletes all settings, and restarts the application"""
        #TODO: save changes
        setting_store = QSettings()
        setting_store.clear()
        setting_store.sync()
        QApplication.exit(GuiMain.restart_code)

    restart_code = 1000

    @staticmethod
    def application_main():
        """
        The application's main function. 
        Create application and main window and run them.
        """
        while True:
            app = QApplication(sys.argv)
            window = GuiMain()
            window.show()
            ret = app.exec_()
            if ret != GuiMain.restart_code:
                break
            del window
            del app

This method works on PyQt. I wrote it for erasing all settings and to restart the application with clean settings. application_main is the main method, and clearSettings is the slot that clears the settings.

class GuiMain

    #Most of implementation missing

    def clearSettings(self):
        """Deletes all settings, and restarts the application"""
        #TODO: save changes
        setting_store = QSettings()
        setting_store.clear()
        setting_store.sync()
        QApplication.exit(GuiMain.restart_code)

    restart_code = 1000

    @staticmethod
    def application_main():
        """
        The application's main function. 
        Create application and main window and run them.
        """
        while True:
            app = QApplication(sys.argv)
            window = GuiMain()
            window.show()
            ret = app.exec_()
            if ret != GuiMain.restart_code:
                break
            del window
            del app
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