General and Desktop

When you place fruit, you do that within the GraphicsScene. So it's the size of the GraphicsScene that matters, not the size of the GraphicsView. QGraphicsScene::sceneRect() might be what you need.

Qt 5.8 After several times, I have this cmake tools in the "manage kits" windows. But it seems like I link 32 bits but I should link 64bit....But I don't know how. I have tried following in building environments Set Path: add this at end: /usr/local/bin Set CC: /usr/bin/cc Set PKG_CONFIG_PATH: /Users/yuminsun/opencv/build/unix-install/opencv.pc** And the message is still: No tool chain set up in kit "Desktop Qt 5.8.0 clang 64bit" for "C". No tool chain set up in kit "Desktop Qt 5.8.0 clang 64bit" for "C". 2017-12-19 13:18:52.433 Qt Creator[25679:2490412] IMKClient Stall detected, please Report your user scenario attaching a spindump (or sysdiagnose) that captures the problem - (imkxpc_bundleIdentifierWithReply:) block performed very slowly (1.12 secs). Warning: Could not determine default QPA plugin for static Qt. Warning: Could not determine default QPA plugin for static Qt. QUnifiedTimer::stopAnimationDriver: driver is not running And press control+B, it gives: :-1: error: symbol(s) not found for architecture x86_64 :-1: error: linker command failed with exit code 1 (use -v to see invocation)

@Wieland When I tested the code by F10 and checkpoints, I got that message in the main() in Plotter plotter;, so I put another checkpoint in the Plotter's constructor to get into it. The executor passed all expressions: setBackgroundRole(QPalette::Dark); setAutoFillBackground(true); setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Expanding); setFocusPolicy(Qt::StrongFocus); rubberBandIsShown = false; zoomInButton = new QToolButton(this); zoomInButton->setIcon(QIcon(":/images/zoomin.png")); zoomInButton->adjustSize(); connect(zoomInButton, SIGNAL(clicked()), this, SLOT(zoomIn())); zoomOutButton = new QToolButton(this); zoomOutButton->setIcon(QIcon(":/images/zoomout.png")); zoomOutButton->adjustSize(); connect(zoomOutButton, SIGNAL(clicked()), this, SLOT(zoomOut())); setPlotSettings(PlotSettings()); except the last one so I thought it is the source of the issue. Anyway, you used a method which led you to the website which has written that message too that seems to be correct. What was that method that resulted in a different output from mine? I used checkpoints and F10. I'm reading the whole code and its explanation in the book to figure the program out completely. After that I'll ask for a remedy no to have that message for the program.

@SnuggleKat you have to inherit second class from qobject.. ‘’’class SecondClass:public QObject’’’

@wrosecrans Thank you for your reply. What do you prefer ? I want to view stl file, I found different examples like e8johan stlviewer from github. It works on ubuntu in my computer but when I downloded it on my raspberry pi it gives conflict error. Stlviewer both uses opengl and GL libraries at the same time.

To summarise for anyone reading this. Thanks to the answers above. You can assign a dynamic property, with a name and value of your choice, via QWidget.setProperty("cssClass", "large"). The stylesheet can match this via selector *[cssClass="large"] { ... }. You can assign multiple values to the property via QWidget.setProperty("cssClass", [ "bold", "large", "rounded" ]). (Or it accepts a space-separated string via "bold large rounded".) The stylesheet can match one of the values via selector *[cssClass~="large"] { ... } (note the ~=). Note that property named class is a special one, referring to the Python/C++ code class of the widget, which you probably should not assign to.

could anyone know how the render the no repeat point with QT3D

@Goffer Just to be clear: this is an NFS/inotify issue/limitation, nothing to do with QFileSystemWatcher per se.

Thank you very much, I forgot this detail!!

@jsulm thx I got it, ui is not a QObject. I have mistaken 'ui' as a QObject, and setUpUi(MainWindow) is setting parent for 'ui', which is unappropriate.

thank you very much!

i use these api to load my customized mesh parsed from a stl file

@Kofr said in How to build a Lib: CALCLIB_COMMON_DLLSPEC double DoIt(int TypeWork, double OperandA, double OperandB, int& ErrorCode); Why do you name the first parameter same as your first enum (TypeWork) and same for ErrorCode?! Don't you mean: CALCLIB_COMMON_DLLSPEC double DoIt(CalcLib::TypeWork typeWork, double OperandA, double OperandB, CalcLib::ErrorCode &errorCode); I can build your project after adding #include <QtCore/QtGlobal> in calclib.h

@Fwomp I modified my answer.

Hi You mean a SLC - layered contour file? Unless you can find a parser for that format, i think you will have to hand write it and then draw it using basic opengl features.