2018年7月15日 · QMainWindow has a bunch of bells and whistles. It is a kind of QWidget with tons of customizations. Use QWidget if you just want something basic. Use QMainWindow if you have a main area, menus, a status bar on the bottom of the window, etc. Use QDialog if you want the window to be a modal popup. Hope this helps.

2022年6月25日 · When I create a new project and add some elements to the layout, these are not shown if QMainWindow is selected as a base class. It loads window but it is fully empty - like UI file isn't taken into account. QMainWindow original base class and Qt Creator view. Empty view on load. It works tho - if base class is simple QWidget.

2023年8月7日 · QMainWindow is the dedicated main window class for your application, it provides menubar, toolbar, docking areas, etc. QDialog is for transient (short-term) UIs, the ones you can use to get input from user, select files, etc. QWidget is a basic building block of a UI, it can be used for building modular UIs based on reusable composite controls.

2022年12月13日 · QMainWindow really isn't particularly special. It's just a widget with some convenience features like a space for a toolbar that you might want in the main window of an application. The big thing I think you are missing is that there is a codegen step in the build process where the .ui file is used to generate MainWindow.

2021年7月1日 · Trying to make a GUI, did something on the PyQt Designer and wanted to load it, but I'm getting this error: TypeError: ('Wrong base class of toplevel widget', (<class '__main__.MainWindow'>, 'QMainWindow')) I'm not really sure what that means, and there isn't a whole of information online, this is my code:

2020年3月25日 · "Cannot open source file QtWidgets/QMainWindow" I've been trying to setup Qt for use with Visual Studio 2019 as I already like using VS, however I am having trouble doing so. I've installed the Qt VS Tools extension ( Link Here ) on a fresh install of VS 2019, pointed it to a Qt 5.14.1 install but when I try to compile the default sample from ...

2019年12月30日 · Upon startup I call the method showWelcomeScreen that sets the CentralWidget using QMainWindow::setCentralWidget. Using menu items I want to switch between the two widgets, so my QAction s triggers slots that call setCentralWidget using the pointers to my widgets.

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2024年2月17日 · I have a large QMainWindow subclass in C++, containing: Top menu bar a QToolbar A QTreeView, showing objects that can be edited a property window, showing properties of the selection An OpenGL viewport to visualize the objects a log window an undo list window search window

2021年9月11日 · But yea, it inherits from QWidget and not QMainWindow like my other 2 classes. How would I check if self.button1... that particular button press was either left or right-click when the method to do so sits in a Class that inherits from QWidgets and not QMainWindow and is therefore a different type than self.button1 ?