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Questions tagged [qwidget]

QWidget is key part of the Qt C++ classes. QWidget is the base class of all the user interface elements in the Qt framework.

The widget is the atom of the user interface: it receives mouse, keyboard and other events from the window system, and paints a representation of itself on the screen. Every widget is rectangular, and they are sorted in a Z-order. A widget is clipped by its parent and by the widgets in front of it.

The official Qt documentation can be found here for Qt 4.8 and here for Qt 5.

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Is there a way to add a QWidget to a QMenu in QtCreator

I'm creating a text editor and I'd like to put the QComboBox in the QMenu. I didn't find any method inside the QMenu that handled such a thing. The closest is QMenu::addAction(). I was wondering of getting around this hurdle. Thanks!
W.K.S
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Detect resizing in Widget-window resized signal

I create a simple UI with Qt Designer and convert it to Python codes. I searched for any method to detect changing window size. This is the generated code : from PyQt5 import QtCore, QtGui, QtWidgets class Ui_MainWindow(object): def…
Mahmood Kohansal
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How can I set Qt tab order for a form with a composite widget?

I have a form written with Qt Designer, which contains a QWidget promoted to a custom widget I have. The custom widget contains several combo boxes. I want the form to have a reasonable tab order, with focus moving from the widget immediately before…
Brian
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How to change a parent widget's background when a child widget has focus?

I would like to highlight a QFrame, if one of it's child widgets has focus (so the users know where to look for the cursor ;-) using something along ui->frame->setFocusPolicy(Qt::StrongFocus); ui->frame->setStyleSheet("QFrame:focus…
Elwood
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How to put QWindow into QWidget's layout (Qt5)

I want to insert QQuickView to my old qt4 application in some widget layout. How to mix QWidget and QWindow in a single application? Are there any examples?
DEgITx
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pyqt4 window resize event

I'm using python3 and pyqt4 and I want some code to run every time my QMainWindow is resized.I would like something like this self.window.resized.connect(self.resize) but resized is not a builtin function or method. Can anyone help.
chicken-me
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Extending a common base: Diamond inheritance vs. QObject

I think I've run into a kind of diamond inheritance problem here. Qt provides a couple of spin boxes, for integer values, for doubles and also for dates/times. They all derive from QAbstractSpinBox: #include class QSpinBox: …
Kamajii
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Qt QStackedWidget Resizing Issue

I have a simple QStackedWidget with 3 different QWidgets in it. The minimum sizes of the QWidgets are (350x200), (200x100), and (450x450). So the problem I'm having is when I resize the QStackedWidget, it has a minimum size of the largest QWidget…
David Ludwig
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Get a list of all QObjects created in a Application

To get a list of all the QWidgets created in an application we can simply call QApplication::allWidgets(). I've read the documentation, and I haven't found anything like this to get a list of all QObjects. If an application creates stand-alone…
BetterWalk
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QLineEdit with custom button

I need to implement LineEdit widget with possibility to add tool buttons at the right end of text area. I know two ways of doing that but both solutions seems ugly. 1) add tool buttons as child widgets of QLineEdit and handle resizeEvent to position…
ArmanHunanyan
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QT How to embed an application into QT widget

In our project we have three independent applications, and we have to develop a QT control application that controls these three applications. The main window will be seperated to three sub windows - each one display another one application. I…
RRR
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QWidget on Mac OS X not focusing in Qt 5.x

I have QSystemTrayIcon with QAction that opens new window of type QWebView. When the window loses focus and I select the QAction again, the window should regain focus. It does on Linux, but doesn't on Mac OS X. The problem is, that when I have…
stepanbujnak
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How can I prevent a QWidget from painting, but still respond to events?

I have a QGLWidget that renders an OpenGL scene inside a Qt application. I would like to add some other translucent Qt widgets that are overlaid on top of the QGLWidget. This is more difficult than with standard widgets since the OpenGL drawing…
Jason R
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QWidget doesn't close when main window is closed

I'm trying to make a main window (QWidget) which open a new QWidget when a button is clicked but when I close the main window, the QWidget recently opened doesn't close. main.cpp QApplication a(argc, argv); MainWindow w; w.show(); return…
Alex L.
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How can I know if the mouse is over the widget?

I am fairly new to Qt (PyQt - PySide). I am trying to build a custom widget which is a menu. However I have hit a hard road and I can not seem to be able to sort myself out. I've read the documentation but I don't think there is a mouse state I can…
Phil
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