General and Desktop

Yes ui->setup() happens nutr[2] has a big hex number that looks like a pointer. I did a qmake on the .pro file and got a Makefile. Did a 'make clean; make' now all is good. Apparently the clean function in qtCreator doesn't really function as advertised Thanks for the help

@Montanaro said in run app in windows from qml: QProcess::start: Process is already running if you want multiple processes to be run you need multiple instances of Process in your QML

@beckseba said in Validator for current and desired value: a single timer does not cover it. It does if you adjust the timeouts to allow for that. I do it myself to avoid multiple QTimers for multiple objects rather that each one having its own timer. I don't know whether that is necessary with Qt's QTimers, but personally I regard them as a limited resource.

@SPlatten said in Variables in pro file.: Are they're equivalents to CMAKE_SOURCE_DIR and CMAKE_BINARY_DIR ? I guess: CMAKE_SOURCE_DIR ==> PWD CMAKE_BINARY_DIR ==> OUT_PWD disclaimer I never used cmake

@SPlatten, zooming and the necessary loading of new (higher or lower resolution) tiles is completely handlet by QtLocation. What I want to do is display a satellite view, similar to when one switches from map view to satellite view in google maps. From what I know, one has to configure a different tile server for that. However, I don't know a) if that is sufficient and b) how to do that.

@JonB I agree, it should not be this hard. QCalendarWidget hides way too much in the private API

Ok. Maybe not quite that. But your input helped me track down what the problem really was. Thank you very much for your help.

@IknowQT If you want to pass parameters to a lambda which are not part of the signal do it in the lambda capture list: connect(lineEdit, &usrSetupLineEdit::UserDefineReturnPress, [edit]() Above I assume that this usrSetupLineEdit you want to pass is named "edit". There is also no need for that cast (edit IS already usrSetupLineEdit*).

@jsulm One of my goals for developing the projects in QML was to use them on mobile devices, say, Android. Suppose someone installs the server app on their Android device and another, somewhere else, installs the client app on their Android device. The one running the client app will somehow be aware of the IP and port number exposed by server. They should then be able to exchange messages in a way. How to do that? How do you guide me to reach this goal, please?

I want to fill in the pixels with some algorithm. It must be pixel accurate. And then draw the resulting image (possibly stretched) onto the screen. I prefere not to use painter functions for this to get maximum speed. Unless the transfer from image to pixelmap takes a lot of time, then maybe drawing to pixmap is faster. But I have to fill in the pixels one by one. So writing to a char array will be faster. And I had problems painting to the screen directly before (see some other posts). To avoid this kind of problems (like scaling) I think it is better to not paint to a pixmap because that probably adapts to the screen too.

self-response QWidget* usrTableDelegate::createEditor(QWidget* parent, const QStyleOptionViewItem& option, const QModelIndex& index) const { //QWidget* w = QStyledItemDelegate::createEditor(parent, option, index); //QLineEdit* lineEdit = qobject_cast<QLineEdit*>(w); usrSetupLineEdit* pEdit = new usrSetupLineEdit(parent);//qobject_cast<usrSetupLineEdit*>(lineEdit); pEdit->SetOnlyNumber(true, true); pEdit->SetRange(-4.0, 4.0); pEdit->setAlignment(Qt::AlignCenter); return pEdit; } void usrTableDelegate::updateEditorGeometry(QWidget* editor, const QStyleOptionViewItem& option, const QModelIndex& index) const { editor->setGeometry(option.rect); }

Can anyone suggest a solution to this problem? No one is interested. Is there no way or is it just being on the lookout?

@VRonin Thank you, I'm not allowed to use a game engine, it it were up to me, I probably wouldn't be using Qt to make a game. I'll probably use the M/V framework but the docs are somewhat confusing to me; different parts of the API are presented in different examples but there doesn't seem to be an overarching logic to the how and why of the examples.

In 2022 also faced this problem. When you press F1 in the program (v. 5.11.1), it gives an error that the assistant.exe file is missing in the bin folder. If you create a bin folder and copy the assistant.exe file into it, the following error appears - ...dll files were not found. As a result, I copied all the folders and files from the program installation folder to the created "bin" folder. By pressing help, assistant.exe began to open, but there is practically no help (information) in it

@Christian-Ehrlicher Cool I'll try that thanks

You may need to add: painter.setRenderHint(QPainter::Antialiasing,true);

@Simmania said in Does QWidget::width() always return width in number of pixels?: So that means you never can be sure the width() is expressed in pixels How should the OS add this scale factor otherwise?

Got it to work, forgo to add msgBox->setModal(false);