General and Desktop

So, I was looking where to save the Qt installer on my PC. Found a logical place, and all the installers from the time were there :-). I also had had the sense at the time to list a full set of instructions to get up and running. It works now. I don't know what the actual issue was, but these were the extra steps. Install CMake and Install the Windows 10 SDK. Nothing about a standalone Qt. Strangely, just after compiling the whole PC froze! And all the Qt stuff was in a Virtual Machine. This is worrying as it should only affect the VM. I'll try again when I am not running anything on the main PC. I think this particular issue is solved though. Thanks for listening!

@umen242 Have you looked at QSyntaxHighlighter Class?

@Christian-Ehrlicher said in Checking that a file is a jpeg or png: But why not use QMimeDatabase for it? Nice! I didn't know about that one :) Great suggestion.

well, I change another new dll, it's ok...

@Captain-Haddock said in PyQt6 QImage.convertToFormat converts transparent areas: How do I prevent transparent areas from being converted? By not converting them to a format which does not support transparency.

@Christian-Ehrlicher and a quick experiemtnal proof-of-concept program is worth more than an answer on a forum.

@JonB my bad, I misunderstood your point. We are on the same line :-)

@Dariusz Unlike QButtonGroup, QGroupBox is a widget. Do you mean you want to use some customized QGroupBox in Designer? You could Promote or write a Custom Widget Plugin for that?

Apart from the fact that I don't see a reason to use QExtSerialPort in favor of QSerialPort, QExtSerialPort is also a QIODevice ...

Adding a menu to a menu is done via QMenu::addMenu()

Can you please at least tell what exact Qt version you're using and how you disabled it? Best would be a small codepiece so we can see what you're really doing and can reproduce it.

@JonB said in passing signal between threads with Qvector as parameter: might be because connect() refuses to accept them for queueing. correct

@Archie888 said in Need help with .pro file, copy files at build: @Paul-Colby Thanks for the tip to the right direction, very helpful!! The .qrc was a mistake, meant .pro, sorry. QMAKE_SUBSTITUTES seems like an interesting cross-platform way to copy files to the build destination from project, and it worked, thanks. However, having to have the .in extension creates issues, having to create a copy automatically with .in and so on, which I can do, but it's not very elegant. But I will definitely keep that in mind. As I checked into the issue again, I now finally got QMAKE_SUBSTITUTES working to run the .bat file, but it needs to be like this: QMAKE_POST_LINK += $$PWD/my_batch_file.bat Unlike with OTHER_FILES, it needs the $$PWD/ as the starting point. Also, no cmd window is opened unlike I was expecting. The execution will be part of the Qt build process, and any echo ouput in your .bat file is shown in the Compile Output tab. However, now I am running into problems with getting access denied with copying with the .bat, so I will have to look into this issue later. Here is the .bat again, which is giving the : @echo off setlocal set BUILD_DIR=%1 set SOURCE_DIR=%~dp0A8NodeAssistant echo Copying A8NodeAssistant folder from %SOURCE_DIR% to %BUILD_DIR%... xcopy /s /e /y %SOURCE_DIR% %BUILD_DIR%\ pause Any help appreciated of course what the mystery could be, if someone has info at the tip of the fingers, but I'll get into this later again myself. Cheers! (I might have to implement the nasty .in file generator in the end, LOL!) Typo on the line: "As I checked into the issue again, I now finally got QMAKE_SUBSTITUTES working to run the .bat file, but it needs to be like this:" Meant: "As I checked into the issue again, I now finally got QMAKE_POST_LINK working to run the .bat file, but it needs to be like this:" It seems that the time period to edit comments here has been decreased.

@ChrisW67 With QFile:copy() I'm unable to access deeppath as I mentioned previously and that is the reason why I use cmd.exe. So I returned to my own code and changed the text picked up using lineEdit : < void MainWindow::on_lineEdit_returnPressed() { if (process->isOpen()) { QString s = ui->lineEdit->text() + "\n"; QTextCodec* codec = QTextCodec::codecForName("IBM-850"); QByteArray ba = codec->fromUnicode(s); } /> And now all is working correctly! 'I tried first with dir ["longpath with accented characters"] and it works...

@Andy314 Yep :) I guess you can assume the Access driver maybe does some forward optimization for you, in some shape or form. IIRC the MS SQL driver is the most sensitive to/affected by forward-onlyness, more so than e.g. MySQL. But it's always worth adding Qt's forwardOnly, makes one think maybe it should have been default as there is probably much code out there doing just forward queries and not realizing how much the default is penalising them.

@AnneRanch , if you're talking about Qt Creator: ClangFormat has an option 'MaxEmptyLinesToKeep'. you can set it to 0, and then enable reformatting of your file (e.g. by selecting 'Full formatting' and 'Format edit code on file save' in Preferences > C++ > Code Style. This will also apply the other formatting rules though, which might or might not be what you want ...