Recent questions tagged Qt

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qt creator - QtCreator does not open terminal for building

I was using qmake build system in my QtCreator 4.1.0-beta1, everything was fine. When I ran my project, a ... window like it does with qmake? 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 development on linux using eclipse?

In Linux, How can I create QT applications in Eclipse? I've seen some integration plugins in eclipse.org ... a suitable solution for 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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qt - can't resize widgets in QVBoxLayout

I have a container widget with a QVBoxLayout. I have about 100 widgets added into the VBoxLayout. They all ... height of widgets in QVBoxLayout? 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 - Qt5.6 QML, why are dynamic models destroyed after garbage collection?

I have a variable number of components, so i'm trying to give each one its own model. ... .github.com/anonymous/86118b67ec804e6149423c14792f312d See Question&Answers more detail:os...

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

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779 views

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qt - How to implement a tree-based QComboBox

How can I implement a QComboBox that allows you to choose from a tree structure, akin to QTreeView? See Question&Answers more detail:os...

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

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751 views

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qt - QComboBox with checkboxes

I'm creating QComboBox with checkboxes. How I can prevent collapsing of view on mouse clicking? I want to be ... and looking for workaround... 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 - problem displaying sympy rendered svg in python

I have the following program which uses sympy and svgmath to render a user's algebraic expression. It nearly works ... form.show() 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 - How to apply opacity mask to a QML item?

The look and feel I'm trying to go for is to have a solid color button, and text on it like "Hello ... a transparency mask on a button element. 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 cannot open input file 'c:Qtqtlibqtmaind.lib'

I am using qt 4.5 I have created a project and I want to compile on visual studio 2008 for windows ... lib Many thanks for any suggestions, 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 to get Javascript in a QWebView to create new instances of C++ based classes?

I've successfully added an C++ object to a QWebFrame with addToJavaScriptWindowObject, and can call a slot on that ... how I can achieve 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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qt - qDebug not showing __FILE__,__LINE__

According to qlogging.h #define qDebug QMessageLogger(__FILE__, __LINE__, Q_FUNC_INFO).debug but when I use like this, ... .3 build from git. 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 - Is C++ compiler allowed to optimize out unreferenced local objects

I use following class to automatically set waiting cursor in the beginning of a certain function and reset the ... optimize out this object? 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 to add specific flags to moc in a qmake project?

I compile a Qt executable using qmake && make on the following project.pro file: INCLUDEPATH *= ../../ ... g++, as QMAKE_CXXFLAGS does) See Question&Answers more detail:os...

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

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600 views

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qt - When is QGLWidget's paintGL called?

All I can find is "whenever the widget needs to be painted." When is that, specifically? 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 do I auto-adjust the size of a QDialog depending on the text length of one of its children?

I have a QDialog I'm working with. It is made somewhat like a QMessageBox. I noticed that the size of the ... I will have more complex dialogs.) See Question&Answers more detail:os...

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

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821 views

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qt - QStandardItem + QComboBox

I am trying to put a QComboBox into a QStandardItem to be used in a QStandardItemModel. I have been looking ... find an answer, any ideas? 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 - Are "public slots:" sections still necessary in Qt5?

A simple question regarding the new signal/slot syntax in Qt5: Are there still benefits for a Q_OBJECT-derived ... 's new signal/slot syntax 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 do I enable antialiasing on QML Shapes?

Here's a QML file that has a Dial control and a custom shape side by side: import QtQuick 2.9 import QtQuick ... How can I antialias the shape? 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 - Draw an arc/circle sector in QML?

I know that it is possible to draw a circle in QML using the following code: Rectangle { width: 150 height: 150 ... I do this using QML only? See Question&Answers more detail:os...

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

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896 views

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qt - Filtering QFilesystemModel

I'm using a QFileSystemModel with a QListview to display all files from a directory. I'd like to filter ... for rows with multiple extensions See Question&Answers more detail:os...

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

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900 views

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qt - Stream Android screen to video player

I'm using Windows 7 64 bit on my laptop and Android 5.0.1 on my Samsung Galaxy S4 device. I'm ... I forward QProcess's output to QMediaPlayer? See Question&Answers more detail:os...

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

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630 views

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qt - Culling items that are outside the visible area

From the docs: The default renderer does not do any CPU-side viewport clipping nor occlusion detection. If ... for full-scene redraws. See Question&Answers more detail:os...

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

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972 views

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qt - QT4 How to blur QPixmap image?

QT4 How to blur QPixmap image? I am looking for something like one of the following: Blur(pixmap); painter.Blur(); ... the best way to do 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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896 views

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qt - QML Form layout (GridLayout) troubles

I am trying now to convert my app UI from C++ to QML. At some step I need a login window so I created it in ... wrong? Qt 5.3.0 Debian 7.5 x32 See Question&Answers more detail:os...

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

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1.0k views

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qt - QML binding to an array element

I have a width property on a QML Rectangle that is set based on another Rectangle with an id of ... property bindings to array elements? See Question&Answers more detail:os...

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

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830 views

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qt - qmake: How do I copy .dll/.so's to the output directory?

I have a Qt-project that builds a dll/shared-library and another Qt-project that tests the library. Is there ... -folder of the test-project? See Question&Answers more detail:os...

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

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683 views

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qt - Efficient way of displaying a continuous stream of QImages

I am currently using a QLabel to do this, but this seems to be rather slow: void Widget::sl_updateLiveStreamLabel( ... I'd appreciate any 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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1.0k views

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qt - How to change the color (background, text) of header of TableView in Qt5?

I use TableView for my application in Qt5. It's possible to change color (background, text and alternate) of rows ... titles). How to do that? See Question&Answers more detail:os...

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

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