General and Desktop

@kirilsagoth said in Communication between Qt application via QProcess: QLocalServer/Socket did the job beautifully. So please mark your post as solved! Thanks.

Yes it will. It's talked about in the details of the class.

Ah, yes, that does make sense. Thanks.

@fem_dev said in QGenericMatrix vs Eigen: So, is there any advantages to inclue Eigen (link) in my project and use it instead of use QGenericMatrix? @SGaist is right, Qt does this only because it doesn't use a ready-made package. If you really need LA, then Qt ain't your thing for the job.

Can you try with a more recent version of Qt ?

Hi, One base rule: all GUI manipulation must be done in the main thread (well the one that started the QApplication event loop).

@cerr The root of whatever the problem is lies in the QInotifyFileSystemWatcherEngine::addPaths: inotify_add_watch failed: Permission denied see whether either of https://toggen.com.au/blog/it-tips/cause-of-qcad-qinotifyfilesystemwatcherengineaddpaths-inotify_add_watch-failed-permission-denied https://forum.libreelec.tv/thread/1805-fail-on-read-only-fs-without-useful-notice/ help you/give you any hints. Otherwise I think you'll have to read up on however "Linux inotify user permissions" work....

I solved ! The author of the libwebsockets library suggested me to initialize the engine with a default subprotocol if the client did not define it. And it worked ! Thanks!

@BriFuture said in How to use c++ library in .c file: the troublesome problem is solved. So please mark your post as such! Thanks.

@JonB Thanks for the quick answer. Since QLinedit seems to be protected, I don't have access. Furthermore, I don't find away how to e.g. set the width of the text box. Anyway, I'll try with style sheets. Since I just started with Qt, it will take a while. Whenever I found a solution I will report on it. Cheers delos

@J-Hilk @JKSH Thx. Looks like no any sense to move out of 5.12 ... At least while 5.15.1 not appeared ... My personal experience of using 5.13 - is very bad. I am choosing release for new application right now. But need to know what to do with new Android requirements for separate application versions and new application archive type that promised to be released on 5.14 and new Qt Creator Version.

Hi Did you try to fool around with https://doc.qt.io/qt-5/qscrollarea.html#ensureWidgetVisible and the margin to see if that can be used ?

@sandro4912 said in Menus not showing up in MainWindow: mGameMenu->addAction(mCustomAction); In this case, in the code as shown your mGameMenu is fine/initialized, but the parameter mCustomAction is an uninitialized variable. A bad parameter to addAction() could doubtless cause a seg fault.

@DrZod I am trying to make a Sudoku.I want to take the inputs using QLineEdit That would mean creating 81 QLineEdits for a standard-sized Sudoku board. I'm not sure in Qt, but this may be regarded as bad practice? My thought (in your next iteration, for public release :) ) would be something like a QTableWidget containing at worst a QLabel or better just plain text without a widget most of the time, with a change over to editable (QLineEdit or otherwise) at the instant user clicks into cell, revert back once clicked outside?