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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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How to make an expandable/collapsable section widget in Qt

I would like to create a custom widget in Qt with the following features: It is a container It may be populated with any Qt layout It may be inside any Qt layout A button allows to collapse/fold vertically the content, so only the button is…
Adrian Maire
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QVision Widget Error upon compile

Only one error to go until I get to use this for my research! Warning: Z-order assignment: " is not a valid widget. FILE: qvvideoreaderblockwidget.ui There's no line number that came with it. I tried finding but, failed to see an open-ended part.…
Rek
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Qt5. Embed QWidget object in QML

I am using Qt5 beta and trying to embed a QWidget-based object into QML. The goal is to use QML as much as possible, and only use QWidget objects where QML does not do what I need. I found a link explaining how to do this for Qt4.7, but I have not…
eatyourgreens
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What is the difference between a QWindow and QWidget

The Qt 5.0 provides a new QWindow class. While the documentation on this class is quite comprehensive, I am failing to see how exactly the QWindow is different from the QWidget class, and in which cases you would prefer the former. Both provide a…
Yellow
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How to set QWidget width?

How to set QWidget width? I know setGeometry(QRect& rect) function to do that, but in that case I should use geometry() function to get former parameters of my QWidget, then I should increment the width and use setGeometry(..). Is there any direct…
Narek
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QLayout: Attempting to add QLayout "" to QWidget "", which already has a layout

I want to create some tabs, and I read this answer: How to add a tab in PySide I use the code in the answer and made some changes. Cause my code has to read some files and get the name of my tabs from those file, so that I add a for loop in my code.…
EricBkc
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Qt Hide Taskbar Item

I have a custom QWidget and I simple don't want it to show up in the taskbar. I have a QSystemTrayIcon for managing exiting/minimizing etc.
user372743
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How to assign callback when the user resizes a QMainWindow?

Neither I could find a tutorial-like scheme for a resize event on QMainWindow, nor I did see any option for adding resize event in the drop-down menu at the Qt design window. I am new to Qt. I'd like to write a slot function for a QMainWindow…
Barney Szabolcs
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Qt Increase QTabWidget's QTabBar size

I need to make the tabs that I have oriented at the bottom of my QTabWidget larger. We'll be using a touch-screen, so the default sizes are a little too small. I see no easy way to do this (currently seeing no good way to even do it at all. The only…
San Jacinto
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How to Clear all the Widgets in Parent Widgets?

I am using the constructor QWidget(QWidget *parent). This parent widget contains a lot of child widgets. I need to clear all the child widgets from the parent at runtime. How can I do this?
saravanan
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How to set user data for a QWidget?

I would like to set an integer number to be stored in a QWidget, and I think the setUserData member function would do the trick but I can't find any documentation. Any hints?
Barney Szabolcs
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How to remove QWidgets from QSplitter

In my app have a window splitted by a QSplitter, and I need to remove an widget. How can I do that? I can't find useful methods
JuanDeLosMuertos
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Why is QWidget's destructor not virtual?

Looking at qwidget.h, I found the destructor as below: ~QWidget(); I was wondering why this is not declared as virtual
S B
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Need something like a finished-signal from QWidget

I'm searching for something like the finished-signal from QDialog, only for QWidget. The reason is, I disable my toolbar once the widget pops up (which isn't a problem at all) and I want the toolbar to be enabled again, once the widget is closed. I…
LarissaGodzilla
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Duplicate a QWidget

I need to be able to copy a Qwidget so I can duplicate a window because it will change during runtime. is this possible? void Duplicate(QWidget * Show) { //I tried... Qwidget Shw = *Show; //but operator= is private //and the copy constructor (I…
Geore Shg
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