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QMainWindow、QWidget和QDialog三个类都是用来创建窗口的，可以直接使用，也可以继承后再使用，在Qt Designer创建UI文件可以选择这三种窗口类型。 如果是主窗口，就使用QMainWindow类，如果是对话框，就使用QDialo…

Unlike exec(), open() is asynchronous, and does not spin an additional event loop. This prevents a series of dangerous bugs from happening (e.g. deleting the dialog's parent while the dialog is open via exec()). When using open() you can connect to the finished() signal of QDialog to be notified when the dialog is closed.

16.01.2020 · 漫谈QWidget及其派生类(三)中我们了QMainWindow到底是个什么东西，接下来就看看QDialog吧，没办法，谁让它这么常用呢？很多人觉得QDialog比QWidget高级很多，为什么呢？QDialog(this) 和 QWidget(this) 前者是窗口，后者不是。QDialog 除 show()外，还有 exec() 和 open() 两个成员用来显示窗...

12.03.2021 · exec() or exec_() The .exec() method is used in Qt to start the event loop of your QApplication or dialog boxes. In Python 2.7 exec was a keyword, meaning it could not be used for variable, function or method names. The solution used in both PyQt4 and PySide was to rename uses of .exec to .exec_() to avoid this conflict.

14.08.2020 · In this tutorial, we will learn how to setup the action from the menu and toolbar of the Main Window class. File->New File or Project... Applications->Qt Gui Application->Choose... We keep the class as MainWindow as given by default. Hit Next. Hit Finish. Here is the main.cpp: From the highlight line, we have an incident of the MainWindow class.

03.10.2021 · Qt has a huge library of built-in widgets available for use in your Python GUIs, from simple line edit and checkboxes, to fully-fledged web browser and media player components. In Qt (and most User Interfaces) ‘widget’ is the name given to a component of the UI that the user can interact with.

Apr 25, 2012 · The problem is that your showEvent () doesn't return since exec () is a blocking call. I would suggest you use QDialog::open () instead, which opens a modal dialog but is a non-blocking function call. Thus: MainWindow::showEvent ( QShowEvent* ) { launchWidget->open (); } Note that normal execution of your program continues when calling open ...

You need to use a QDialog and show it using exec, which will block the rest of the application until it is closed. The return value of exec also tells you ...

17.01.2016 · 简述在分享所有基础知识之前，很有必要在这里介绍下常用的窗口-QWidget、QDialog、QMainWindow。熟悉Qt的同学都应该知道，在新建Qt Widgets项目进行类信息选择时会碰到它们，没错，很巧，每次都能碰到。所以，在以后的Qt开发中，我们会经常和它们打交道。

QMainWindow can store the state of its layout with saveState(); it can later be retrieved with restoreState(). It is the position and size (relative to the size of the main window) of the toolbars and dock widgets that are stored.

In this tutorial, we will learn how to setup the action from the menu and toolbar of the Main Window class. File->New File or Project... Applications->Qt Gui Application->Choose... We keep the class as MainWindow as given by default. Hit Next. Hit Finish. Here is the main.cpp: From the highlight line, we have an incident of the MainWindow class.

I want to open the settings window and wait until it closes (Something like .exec() in QDialog). I noticed when debugging all settingsWin ...

Detailed Description. QGuiApplication contains the main event loop, where all events from the window system and other sources are processed and dispatched. It also handles the application's initialization and finalization, and provides session management. In addition, QGuiApplication handles most of the system-wide and application-wide settings ...

List of All Members for QMainWindow. This is the complete list of members for QMainWindow, including inherited members. enum DockOption. flags DockOptions. enum PaintDeviceMetric. QMainWindow (QWidget *, Qt::WindowFlags ) enum RenderFlag. flags RenderFlags. close () : bool.

I am using QMainWindow for GUI development of my project. ... w2->show(); w2->setWindowModality(Qt::ApplicationModal); return a.exec(); }.

22.12.2018 · 一、QMainWindow QmainWindow主窗口为用户提供一个应用程序框架，它有自己的布局，可以在布局中添加控件。在主窗口中可以添加控件，比如将工具栏、菜单栏、状态栏等添加到布局管理器中。 窗

Detailed Description Qt Main Window Framework. A main window provides a framework for building an application's user interface. Qt has QMainWindow and its related classes for main window management. QMainWindow has its own layout to which you can add QToolBars, QDockWidgets, a QMenuBar, and a QStatusBar.The layout has a center area that can be …

If it is a QDialog type, this feature is easy to implement, just need to block the original window by QDialog's EXEC function, but QMainWindow is not such a ...

QMainWindow created after qApp->exec() doesn't show up. Just working on my first Qt ( qt4.2.3 / WinXP /GPL ) application.

02.01.2016 · 让QMainWindow也表现出QDialog的exec函数的特征. 场景描述：主窗口a (QMainWindow类型）和主窗口b (QMainWindow)，b是通过a窗口中某一个按钮弹出来的。. 用过Qt的同学应该很清楚，如果是QDialog类型的话，这个功能是很容易实现的，只需要通过QDialog的exec函数就可以阻塞原 ...

Finally we'll look at Qt's QMainWindow which offers some useful common ... Start the event loop. app.exec() # Your application won't reach ...

QApplication specializes QGuiApplication with some functionality needed for QWidget -based applications. It handles widget specific initialization, finalization. For any GUI application using Qt, there is precisely one QApplication object, no matter whether the application has 0, 1, 2 or more windows at any given time.

I'm using Pyside2, Python 3.8 I have a QMainWindow with a pushbutton, when the button is clicked, a QDialog shows up I want to retrieve the ...

Using any exec() methods is a surefire way to have bugs, since suddenly your gui code can be reentered. Don't do it., How do attackers use ...

... def loginClicked(self): RPD = RPDMainWindow() RPD.exec() class RPDMainWindow(QMainWindow): def __init__(self, parent=None): super(RPDMainWindow, self).