Recent questions tagged Qt

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I want to save a QList<int> to my QSettings without looping through it. I know that I could use writeArray ... on deleting the pointer .. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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qt - Understanding the "underlying C/C++ object has been deleted" error

It's not the first time I am getting the RuntimeError: underlying C/C++ object has been deleted. I've ... test if the underlying object exists? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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qt - QtCreator and Command Line Arguments

Is there a way to send command line arguments to a program being debugged in QtCreator? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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qt creator - Howto prepare QTCreator for linux driver & kernel development

i tried a few IDEs on linux to develop driver in C. QtCreator suits best for me. I need the IDE just ... for a struct? regards camelord. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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qt - Convert Python Opencv Image (numpy array) to PyQt QPixmap image

I am trying to convert python opencv image to QPixmap. I follow the instruction shows Page Link and my code ... problem is. Could anyone help? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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870 views

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qt - How do I use qmake to build multiple binaries in a single project?

I'm writing a small qt app suite that consists of a set of small programs that work on the same set of ... my "situation". Help appreciated, jrh See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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qt - c++: when to use pointers?

After reading some tutorials I came to the conclusion that one should always use pointers for objects. But I ... When should I use pointers? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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516 views

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qt - Generally speaking, how are (Python) projects structured?

I'm a bit lost when it comes to structuring my project(s). I try to structure things in ways that ... do sailqt.gui.generate_gui.generate()? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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qt - Qmake project dependencies (linked libraries)

I have a project that links to a number of shared libraries. Lets say project A depends on projects B and ... dependencies in my project file? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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qt - How come this code only toggles blue? (Python, PyQt)

For some reason running this code only toggles the color blue, when its supposed to toggle each one of the colors ... ) sys.exit(app.exec_()) See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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qt - AttributeError: 'bool' object has no attribute 'le' -- pyqt -- getting text into python variable

I have created a UI using Qt Designer which has a simple line input and a push button. I tried getting the input ... "Program", "Submit", None)) See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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947 views

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qt - qml application not shown main window

I have qml Windows application. When run it in debug mode, everything is ok. When I make build and run it from C: ... start... Can you help me? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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qt - QPushButton alignment on top another widget

I have a QListWidget and a QPushButton that clears the QListWidget. Right now my button is next to the QListWidget ... a better idea than this? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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713 views

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qt - Having trouble decrypting a well-formed cipher text using Crypto++

Background I've been struggling with decrypting an apparently well-formed cipher text for about a day. Assume we've ... s just driving me crazy. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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884 views

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qt - Sort and filter a C++ model via QML functors?

I have a polymorphic (as in arbitrary roles) QObject model that is mostly instantiated declaratively from QML, as ... does for return values. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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874 views

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qt - QComboBox - How to set hint text on combo box

The application GUI I working requires a combo box for user to select item. When the application starts, the combo ... -prop. Thank in advance! See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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699 views

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qt - What is the best way to exit out of a loop after an elapsed time of 30ms in C++

What is the best way to exit out of a loop as close to 30ms as possible in C++. Polling boost:microsec_clock ... 'd like to update the viewport. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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468 views

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qt - QList: Out of memory

I have a graphical application written in Qt for embedded linux. Part of this application is to update a display ... This is the error code. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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850 views

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qt - How to make the text fill all the QLabel's space?

I am working on a PyQt5 project, but would be happy to read C++/Qt answer as well, because C++ ... myWindowHeight to increase, which is bad. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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579 views

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qt - Problems with Multiple QApplications

Can someone help me understand what are the problems in running multiple QApplications on Qt for Embedded Linux? ... provide pointers on it? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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525 views

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qt - What's the QMetaCallEvent for and how to access its details?

I have an event filter and I noticed when I click to expand/collapse a tree branch I get QEvent::MetaCall. ... is this event typically used for? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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658 views

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qt - How to remove spacing in ChartView?

Does anyone know how to remove this spacing? Those lines below reduce them but not completely remove. margins ... .printChannelId() } } See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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2.0k views

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qt - Overlapping widgets in QtDesigner

I want to overlay two widgets in QtDesigner: There is the big QTextBrowser, and below in the down right corner should ... is not what I want: See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1.2k views

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qt - How to give specific spacing to items in a QML layout?

I have a ColumnLayout, which has its anchor set to anchor.fill: parent, therefore it has already a set dimension ... to avoid this if possible. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1.4k views

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qt - Connecting QTableView selectionChanged signal produces segfault with PyQt

I have a QTableView in a PyQt application, and I want to keep track of when the selection changes. I've ... Am I doing something silly here? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1.2k views

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qt - Resize window to fit content

I have a QGLWidget, which I want to resize to a given resolution (bigger than the containing window). My ... together with a group box. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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725 views

1 answer

qt - Using QWidget::update() from non-GUI thread

Sometimes my application crashes in QWidget::update() that is performing in non-GUI thread. I am developing an ... on Windows 7 and Linux. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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653 views

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qt - What is the scope of ID in QML?

The document said we cannot have the same ID in one file. That means we can have the same id in different ... But how can i differentiate them. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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