General and Desktop

You're right. The forum search function found this: https://forum.qt.io/topic/130480/porting-qaudiodevice-to-qt6-2

@jsulm None of them is emitted and the file is downloaded successfully. What else can I try?

@JonB said in Delete QProcess started in MainWindow::closeEvent: sounds like AV-specific behaviour anyway. Actually this is just a scenario I am making up in my head. I am not sure this actually happen. So just forget it. No, do your deletions in program. Unless you have a very good reason not to do so, which will not be the case. They don't take that long, and using up more & more memory is worse. Thanks, I will do that.

@Yaldiz No, as I said there is no static void QTimeZone::setTimeZone() function. There are C library calls like tzset() which work off an (TZ?) environment variable you could alter. But I do not know which Qt or other libraries calls use that versus a more native timezone OS call.

@addebito , I have an issue more or less the same as you. I suppose the main issue comes from one program that has opened the serial port and initialed any DCB parameters, when your Qt program opens the device, Qt driver does not reset all DCB data, but some parameters did not suitable for QtSerialPort, so the issue comes up. here is a DCB that first open after the PC reset: [image: 12289801-ad2e-44f7-baf9-00fc46351e2e.png] here is a DCB being opened by another program, it changed XoffLim/XonLim [image: d65bfe48-77f2-4379-ae98-65e7f39ae8ed.png] so, I write some code clear DCB before Qt open serial port: #if (defined (_WIN32) || defined (_WIN64)) void clearSerialPort (const QString &path) { #include <winbase.h> QString deviceString = path.startsWith(QLatin1String("COM")) ? (QLatin1String("\\\\.\\") + path) : path; HANDLE handle = ::CreateFile( reinterpret_cast<const wchar_t*>(deviceString.utf16()), GENERIC_READ | GENERIC_WRITE, 0, nullptr, OPEN_EXISTING, FILE_FLAG_OVERLAPPED, nullptr); if (handle == INVALID_HANDLE_VALUE) { return; } DCB dcb; memset(&dcb, 0, sizeof(DCB)); //::ZeroMemory(dcb, sizeof(dcb)); dcb.DCBlength = sizeof(DCB); if (::GetCommState(handle, &dcb)) { dcb.XoffLim = 0; dcb.XonLim = 0; ::SetCommState(handle, &dcb); } ::CloseHandle(handle); } #endif

Hi, Which post was it ? That might help other people coming to this thread.

Ok thanks.

@ivanicy QTreeView simply displays the parent, child & sibling hierarchy of its model. Get things in the right place there and the treeview will reflect it. You cannot move items, remove them from where you don't want them and insert them where you do. but I need to avoid the case that I move an item inside another item. I don't want to create item children. I only want to move the items order. You have to "move an item inside another item" if you want to change parent/child/depth. If only at sibling level, remove and re-insert as desired.

@JonB , thank you.

yes, this link gave me an idea on how to do the conditional and I tried it and it worked. Thanks

@SimonSchroeder I agree your point that it's hard to have the full control of disk since there is an OS between disk and us. Especially your 3rd point, I have the same thought either. BTW, I gave up calling QFile::map and QFile::unmap but calling the CreateFileMapping+MapViewOfFile and UnmapViewOfFile respectively. Good news is that CreateFileMapping is the culprit of taking up the most time of QFile::map, I mean spike is caused by CreateFileMapping API. However, it's still not sure why it took so much time and keeping waiting for Microsoft's reply.

@SPlatten QListWidgetItem::listWidget()->row(item). However, you may be safer using QListWidgetItem::listWidget()->findItems(item->text()), instead of relying on indexes staying the same, depending on what you are doing.

@jsulm No It doesn't start as root.

Use add_library(...) in your 'projectA' instead of qt_add_executable(...).