Using Q3DBars - getting linker errors
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I'm trying to follow the example given here showing how to use Q3DBars. I've been able to compile, link, and run AudioLevels Example which uses Q3DBars without error.
When I try creating my own application to initialize a Q3DBars object, I get linker errors saying that it is unable to find a reference to QtDataVisualization::Q3DBars::Q3DBars(QSurfaceFormat const*, QWindow*).
Here is my code, which is based off the example for Q3DBars from the documentation:
#include <QGuiApplication> #include <QtDataVisualization/Q3DBars> using namespace QtDataVisualization; int main(int argc, char *argv[]) { QGuiApplication a(argc, argv); Q3DBars b; return a.exec(); }
Here is my .pro file:
#------------------------------------------------- # # Project created by QtCreator 2018-11-19T11:59:09 # #------------------------------------------------- QT += core gui greaterThan(QT_MAJOR_VERSION, 4): QT += widgets TARGET = testtest TEMPLATE = app DEFINES += QT_DEPRECATED_WARNINGS CONFIG += c++11 SOURCES += \ main.cpp # Default rules for deployment. qnx: target.path = /tmp/$${TARGET}/bin else: unix:!android: target.path = /opt/$${TARGET}/bin !isEmpty(target.path): INSTALLS += target
Ultimately I was going to replace the data given in the example with my own data and wrap the implementation in its own class for ease of use, but I can't even instantiate a Q3DBars object because I am unable to get my code to link. What am I missing that prevents the linker from finding the definitions for Q3DBars? I've tried compiling on both Windows 10/Linux using VS2017 and gcc 7.3.0, Qt version 5.9. I've also tried cleaning and deleting my build directories, re-running qmake but had no success.
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@bear1827
Hi
Its mentioned here
https://doc.qt.io/qt-5.11/qtdatavisualization-index.html