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After additionally installing these dependencies: sudo apt install qt5-doc qt5-doc-html qtbase5-doc-html the examples appeared. To get some desktop examples to build, I also had to install these: sudo apt install cmake clang-8 libclang1-8 and then make sure that the qt-version and cmake-tool were set in Tools > Options > Kits Edit: I ended up selecting /usr/lib/qt5/bin/qmake (I think the other qmake scripts would also work), the "no qmlscene installed" message is still present, but doesn't seem to be a problem.

I figured out the problem, it was caused by my file path name being too long. It worked when I shortened the folder name.

@Tonyvazquezzz Yes, it is possible.

OK thanks, here's what I found works: ASM_FILES += myfile.asm ASMEXTRAFLAGS = -march=armv8-a QMAKE_EXTRA_TARGETS += myfile.o asm.output = ${QMAKE_FILE_BASE}.o asm.commands = as $$ASMEXTRAFLAGS -o ${QMAKE_FILE_BASE}.o ${QMAKE_FILE_NAME} asm.input = ASM_FILES QMAKE_EXTRA_COMPILERS += asm

Hi, thanks for the response. That was not what I was looking for, but I found another way. I used QGraphicsScene.

@Nekreg45 See Nailing 13 signal and slot mistakes with clazy 1.3. That's KDAB and from 2018. It suggests: connect-by-name Warns when auto-connection slots are used. They’re also known as “connect by name”, an old and unpopular feature which shouldn’t be used anymore.

Great ! Since you have it working now, please mark the thread as solved using the "Topic Tools" button or the three doted menu beside the answer you deem correct so that other forum users may know a solution was found :-)

Hi, Glad you found out, don't forget to mark the thread as solved using the "Topic Tools" button so other forum users may know a solution has been found :-)

@aftershocker1 said in Signals and Slots not connecting: //objects declared QtTestTool qttesttool; SPS2data sps2data; Where are the these declared? As member variables in an instance which persists? I would expect those lines in the class declaration in the .h file, not in the .cpp file..... Your connect() looks good.

@sierdzio damn exactly what i was trying todo! :) thank you so much for that :)

Using 64K combos from 2bytes, with 2 decimal points zero to 640.00+ appears possible. The point is not decimal. 10 bits of fractional gives you 3 decimal digits, meaning that you get 6 more bits for the leading part, which is 64 (in decimal), so 64.xxx is exactly representable. You could "lie" if you can settle to give up a bit from the fractional part: 7 bits leading + 9 bits fractional -> up to 128.xxx with 2.7 decimal digits after the dot (your LSB in decimal would be 0.002 then)

Fixed, no longer an issue. QRect rctSection; int intOnscreenSpan((truth::msintViewMax - truth::msintViewMin) * mptPixelsPerBSCAN.y()), intYoffset(truth::msintViewMin * mptPixelsPerBSCAN.y()); intYoffset = intOnscreenSpan + intYoffset; rctSection.setRect(0, rctOffscreen.height() - intYoffset, mszOnScreen.width(), intOnscreenSpan); QImage imgSection(imgStrip.copy(rctSection));

Here is one approach you could find with 30 seconds of looking in the examples: https://doc.qt.io/qt-5/qtwidgets-richtext-orderform-example.html

@eyllanesc thank you,i will try it.

"`" QSurfaceFormat surfaceFormat; surfaceFormat.setMajorVersion(4); surfaceFormat.setMinorVersion(3); QOpenGLContext openGLContext; openGLContext.setFormat(surfaceFormat); openGLContext.create(); QOffscreenSurface surface; surface.setFormat(surfaceFormat); surface.create(); openGLContext.makeCurrent(&surface); QOpenGLFunctions *f = openGLContext.currentContext()->functions(); f->initializeOpenGLFunctions(); f->glFlush(); QSize vpSize = QSize(m_ScreenWidth, m_ScreenHeight); qDebug("Hi"); QOpenGLFramebufferObjectFormat fboFormat; fboFormat.setAttachment(QOpenGLFramebufferObject::CombinedDepthStencil); m_fbo = new QOpenGLFramebufferObject (vpSize, fboFormat); fboFormat.setTextureTarget(GL_TEXTURE_2D); RenderAllOPenGLWidgets(); // reendering all widgets based on timestamp. this->update(); QCoreApplication::processEvents(); QThread::usleep(1000); m_fbo->release(); QString ImageName = QString::number(FBOCaptureTime) + QString(".png");; QImage fb = m_fbo->toImage().convertToFormat(QImage::Format_RGB32); fb.save(ImageName, "PNG"); "`"

@Abhi_Varma said in QByteArray dequeue() crash: @SGaist Yes. It is multithreaded app. and how can I protect the access to the queue. If you're unsure about this, maybe you shouldn't do multi threading to start with, especially as Qt-Classes/Modules have almost always asynchronous apis. For completeness however take a look at mutexes https://doc.qt.io/qt-5/qmutex.html https://en.cppreference.com/w/cpp/thread/mutex (I have added few more comments to the post at the end) My question why isn't my exception handling working and how can I resolve this. because c++ is not js or python, you can't move everything in a try catch block and be done with it. That only works when exceptions are actually thrown. 😉 An invalid pointer/instance access does not fall in that category :D

Hi, and welcome! @Victor-Dai said in Undefined symbols for architecture x86_64:: /usr/local/lib/libhiredis.dylib, building for macOS-x86_64 but attempting to link with file built for macOS-arm64 You are using an x86_64 compiler but you are trying to link to an ARM64 library. That is not allowed. Some possible solutions are: Install an x86_64 version of libhiredis, OR Wait for Qt 6.2 to be released, and then build your application with an ARM64 compiler: https://bugreports.qt.io/browse/QTBUG-85279