Recent questions tagged Qt

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qt creator - Where are variables such as $(MKDIR) and $(COPY_DIR) defined?

I am trying to get hold of the values these variables contain but I couldn't find any informations about them ... are these variables defined ? See Question&Answers more detail:os...

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

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806 views

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qt - QSettings - File chooser should remember the last directory

I upload a file from a location, then the next upload has to point the last uploaded location. How can I accomplish thus using QSettings? See Question&Answers more detail:os...

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

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812 views

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qt - How to have a fixed-size layout that also keeps the window from resizing?

I have a container widget. It's size policies are "Fixed" (both vertical and horizontal). it has ... and not respecting its constraints? See Question&Answers more detail:os...

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

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784 views

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qt - Populate GridLayout with Repeater

I try to add cells to my GridLayout by using a Repeater. My data is stored in a model and containing two properties per ... --------------+ See Question&Answers more detail:os...

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

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631 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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1.2k views

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qt - QProcess and shell : Destroyed while process is still running

I want to launch a shell script with Qt. QProcess process; process.start(commandLine, QStringList() << confFile); ... time. What is the problem? See Question&Answers more detail:os...

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

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627 views

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qt - How to implement itemChecked and itemUnchecked signals for QTreeWidget in PyQt4?

Where are the signals itemChecked and itemUncheсked on the QTreeWidget? Qt Signals: (quote from PyQt4 QTreeWidget ... I'm doing wrong? See Question&Answers more detail:os...

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

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782 views

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qt - How to suppress warnings for file included from header

I use GCC -Weffc++ option in my Qt project. To suppress warnings from Qt headers i add QMAKE_CXXFLAGS += -isystem ... there a way to fix 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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847 views

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qt - Calling a QML function from C++

I'm developing a Blackberry 10 mobile application using the BB Native SDK. I need to call a QML function into my C++ ... .lon = lon; ... } } 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 - Fatal error while compiling PyQt5: Python.h does not exist

I'm trying to install PyQt5 on my Ubuntu 12.04 box. So after downloading it from here I untarred it, ran ... the relevant Python.h file be? 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

1 answer

qt - How to find QML item by its string id?

I have a string id of an object I need to find in QML tree. For example: var idToFind = " ... for some other dynamically created controls. See Question&Answers more detail:os...

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

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918 views

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qt - QtCreator no debugger set up (Windows)

I am trying to use Qt creator on Windows, and when I try to Start Debugging, it says "No debbuger set up". How do I configure 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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945 views

1 answer

qt - QPushButton icon aligned left with text centered

In my Qt 5.7.1 application I've some buttons, I want to align button's icons to left and centre text, ... aligned center? Thank you for 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

1 answer

qt - What is the use of the ui.qml files in Qt5 (QML)?

As far as I can see the .qml files can be used to define the UI, which seems to override whatever is written ... I'm using Qt5 with Qt Creator. See Question&Answers more detail:os...

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

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918 views

1 answer

qt - 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 ... . How can I do this? See Question&Answers more detail:os...

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

0 votes

825 views

1 answer

qt - How to find QML item by its string id?

I have a string id of an object I need to find in QML tree. For example: var idToFind = " ... for some other dynamically created controls. See Question&Answers more detail:os...

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

0 votes

796 views

1 answer

qt - QtCreator no debugger set up (Windows)

I am trying to use Qt creator on Windows, and when I try to Start Debugging, it says "No debbuger set up". How do I configure it? See Question&Answers more detail:os...

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

0 votes

937 views

1 answer

qt - QPushButton icon aligned left with text centered

In my Qt 5.7.1 application I've some buttons, I want to align button's icons to left and centre text, ... aligned center? Thank you for help. See Question&Answers more detail:os...

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

0 votes

804 views

1 answer

qt - What is the use of the ui.qml files in Qt5 (QML)?

As far as I can see the .qml files can be used to define the UI, which seems to override whatever is written ... I'm using Qt5 with Qt Creator. See Question&Answers more detail:os...

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

0 votes

731 views

1 answer

qt - 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 ... . How can I do this? See Question&Answers more detail:os...

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

0 votes

544 views

1 answer

qt - How to add elements to a DelegateModelGroup depending on a property

I have a ListModel and a DelegateModel, a ListView and 3 Buttons. The DelegateModel has one Group: myGroup With ... want to, unless necessary. See Question&Answers more detail:os...

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

0 votes

738 views

1 answer

qt - Simulating a mouse button click in Windows

I'm writing Remote Desktop clone in C++ using QT. So far I'm able to move the mouse cursor around ... mouse button has been clicked? Thanks. See Question&Answers more detail:os...

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

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843 views

1 answer

qt creator - Qt project files and PREFIX variable

I included PREFIX = /usr/local inside my project file and then I run qmake myproject.pro The makefile doesn' ... something wrong. 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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1.1k views

1 answer

qt - Intercepting Tab key press to manage focus switching manually

I want to intercept Tab key press in my main window to prevent Qt from switching focus. Here's what I've tried ... How to achieve 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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825 views

1 answer

qt - QFileDialog::DontUseNativeDialog is not working

I have an issue with a simple program. I'm opening a QFileDialog this way: QFileDialog fileDialog(this); fileDialog. ... ) plz tell me. Thanks. See Question&Answers more detail:os...

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

0 votes

930 views

1 answer

qt - Create a random string or number in Qt4

Is there any function or something like that by which I can create totally random strings or numbers? See Question&Answers more detail:os...

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

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762 views

1 answer

qt - How to specify a unicode character using QString?

How can I specify a unicode character by code (such as "4FF0") using QString? I tried QString s("u4FF0"); ... s = QString::fromStdWString(str)); See Question&Answers more detail:os...

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

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1.6k views

1 answer

qt - switch/case statement in C++ with a QString type

I want to use switch-case in my program but the compiler gives me this error: switch expression of type 'QString' ... break ; } return flag ; } See Question&Answers more detail:os...

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

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