Issues installation Timeline for QT Creator using Qt 5.15.2 on Mac Big Sur

Samjproctor

I am new to Qt, and cannot install Qtquicktimeline. I have cloned the git from this address https://github.com/qt/qtquicktimeline

I also found this website https://code.qt.io/cgit/qt/qtquicktimeline.git/tree/ which seems to show the active development. I noticed the .pro and qmldir files were not in the initial git repo so I have added them to my directory.

I then go to terminal and change to my directory Qt5/5.15.2/clang_64 and then run the following

bin/qmake qtquicktimeline/qtquicktimeline.pro

This seems to work without any issues. I then type 'make' and this is where the errors occur. The output from terminal is printed below.

In file included from ../../../qtquicktimeline/src/imports/timeline/qquickkeyframe.cpp:33:
../../../qtquicktimeline/src/imports/timeline/keyframedatautils_p.h:234:34: error: no member named 'metaType' in 'QVariant'
    const QMetaType type = value.metaType();
                           ~~~~~ ^
../../../qtquicktimeline/src/imports/timeline/qquickkeyframe.cpp:311:12: error: no matching constructor for initialization of 'QQmlListProperty<QQuickKeyframe>'
    return { this, &d->keyframes, QQuickKeyframeGroupPrivate::append_keyframe,
           ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
../../../lib/QtQml.framework/Headers/qqmllist.h:80:5: note: candidate constructor not viable: no known conversion from 'qsizetype (QQmlListProperty<QQuickKeyframe> *)'
      (aka 'long long (QQmlListProperty<QQuickKeyframe> *)') to 'QQmlListProperty<QQuickKeyframe>::CountFunction' (aka 'int (*)(QQmlListProperty<QQuickKeyframe> *)') for 4th argument
    QQmlListProperty(QObject *o, void *d, AppendFunction a, CountFunction c, AtFunction t,
    ^
../../../lib/QtQml.framework/Headers/qqmllist.h:104:5: note: candidate constructor not viable: requires 4 arguments, but 6 were provided
    QQmlListProperty(QObject *o, void *d, CountFunction c, AtFunction a)
    ^
../../../lib/QtQml.framework/Headers/qqmllist.h:92:5: note: candidate constructor not viable: requires 8 arguments, but 6 were provided
    QQmlListProperty(QObject *o, void *d, AppendFunction a, CountFunction c, AtFunction t,
    ^
../../../lib/QtQml.framework/Headers/qqmllist.h:69:5: note: candidate constructor not viable: requires 2 arguments, but 6 were provided
    QQmlListProperty(QObject *o, QList<T *> &list)
    ^
../../../lib/QtQml.framework/Headers/qqmllist.h:75:5: note: candidate constructor not viable: requires 2 arguments, but 6 were provided
    QQmlListProperty(QObject *o, QList<T *> *list)
    ^
../../../lib/QtQml.framework/Headers/qqmllist.h:56:7: note: candidate constructor (the implicit copy constructor) not viable: requires 1 argument, but 6 were provided
class QQmlListProperty {
      ^
../../../lib/QtQml.framework/Headers/qqmllist.h:56:7: note: candidate constructor (the implicit move constructor) not viable: requires 1 argument, but 6 were provided
../../../lib/QtQml.framework/Headers/qqmllist.h:65:5: note: candidate constructor not viable: requires 0 arguments, but 6 were provided
    QQmlListProperty() = default;
    ^
../../../qtquicktimeline/src/imports/timeline/qquickkeyframe.cpp:521:14: error: no matching member function for call to 'convert'
    preValue.convert(targetType);
    ~~~~~~~~~^~~~~~~
../../../lib/QtCore.framework/Headers/qvariant.h:288:10: note: candidate function not viable: no known conversion from 'const QMetaType' to 'int' for 1st argument
    bool convert(int targetTypeId);
         ^
../../../lib/QtCore.framework/Headers/qvariant.h:495:10: note: candidate function not viable: requires 2 arguments, but 1 was provided
    bool convert(const int t, void *ptr) const; // ### Qt6: drop const
         ^
../../../qtquicktimeline/src/imports/timeline/qquickkeyframe.cpp:523:20: error: no matching member function for call to 'convert'
    convertedValue.convert(targetType);
    ~~~~~~~~~~~~~~~^~~~~~~
../../../lib/QtCore.framework/Headers/qvariant.h:288:10: note: candidate function not viable: no known conversion from 'const QMetaType' to 'int' for 1st argument
    bool convert(int targetTypeId);
         ^
../../../lib/QtCore.framework/Headers/qvariant.h:495:10: note: candidate function not viable: requires 2 arguments, but 1 was provided
    bool convert(const int t, void *ptr) const; // ### Qt6: drop const
         ^
4 errors generated.
make[3]: *** [.obj/qquickkeyframe.o] Error 1
make[2]: *** [sub-timeline-make_first] Error 2
make[1]: *** [sub-imports-make_first] Error 2
make: *** [sub-src-make_first] Error 2

What seems weird is that I can see in the terminal message 'Qt6' statements. I do not know how to install timeline and it has driven me crazy for several hours now. Please can anyone help?

Christian Ehrlicher

You should check out the branch for Qt5. The one you're using now is for Qt6 - QVariant::metaType() is only available since Qt6.0

Samjproctor

I feel so stupid. Thank you so much. I thought I downloaded the git branch for 5.15.2 but I hadn’t. I have just changed to Qt 6 and it installed perfectly.