[QWT] qwt-6.1.4 doesn't compile on Qt6.8.2 / mingw1310_64 on Windows 10

Cedric-air

When I compile qwt-6.1.4, I get this error:
qwt_painter.cpp:29:10: fatal error: qdesktopwidget.h: No such file or directory
29 | #include <qdesktopwidget.h>

Here I see QDesktopWidget has been removed:
https://stackoverflow.com/questions/74163821/qt-qdesktopwidget-file-not-found
https://doc.qt.io/qt-6/widgets-changes-qt6.html

Commands:

qmake qwt.pro
mingw32-make -j

Versions:

qwt-6.1.4
qt 6.8.2
mingw1310_64
Windows 10 Pro 22H2 19045.5487

Terminal output:

Setting up environment for Qt usage...

C:\Qt\6.8.2\mingw_64>cd "c:\Users\cedric\Downloads\qwt-6.1.4\qwt-6.1.4"

c:\Users\cedric\Downloads\qwt-6.1.4\qwt-6.1.4>qmake qwt.pro
Info: creating stash file C:\Users\cedric\Downloads\qwt-6.1.4\qwt-6.1.4\.qmake.stash

c:\Users\cedric\Downloads\qwt-6.1.4\qwt-6.1.4>mingw32-make -j
cd src\ && ( if not exist Makefile C:\Qt\6.8.2\mingw_64\bin\qmake.exe -o Makefile C:\Users\cedric\Downloads\qwt-6.1.4\qwt-6.1.4\src\src.pro ) && mingw32-make -f Makefile
mingw32-make[1]: Entering directory 'c:/Users/cedric/Downloads/qwt-6.1.4/qwt-6.1.4/src'
mingw32-make -f Makefile.Release all
mingw32-make -f Makefile.Debug all
mingw32-make[2]: Entering directory 'c:/Users/cedric/Downloads/qwt-6.1.4/qwt-6.1.4/src'
mingw32-make[2]: Entering directory 'c:/Users/cedric/Downloads/qwt-6.1.4/qwt-6.1.4/src'
compiling qwt_abstract_scale_draw.cpp
compiling qwt_abstract_scale_draw.cpp
compiling qwt_clipper.cpp
compiling qwt_clipper.cpp
<snip>
compiling qwt_plot_abstract_barchart.cpp
compiling qwt_plot_barchart.cpp
compiling qwt_plot_multi_barchart.cpp

compiling qwt_plot_zoneitem.cpp

compiling qwt_plot_spectrogram.cpp
qwt_painter.cpp:29:10: fatal error: qdesktopwidget.h: No such file or directory
   29 | #include <qdesktopwidget.h>
      |          ^~~~~~~~~~~~~~~~~~
compilation terminated.
compiling qwt_plot_spectrocurve.cpp
compiling qwt_plot_scaleitem.cpp
qwt_date_scale_engine.cpp:compiling qwt_plot_legenditem.cpp
<snip>
compiling qwt_plot_directpainter.cpp

compiling qwt_wheel.cpp
          qwt_date_scale_draw.cpp: In member function '
me QwtDateScaleEngine::QwtDynGridLayout::voidIn file included from qwt_magnifier.cpp: In member function 'virtual void QwtMagnifier::widgetWheelEvent(QWheelEvent*)':
qwt_magnifier.cpp:441:31: error: 'class QWheelEvent' has no member named 'delta'
  441 |             qAbs( wheelEvent->delta() / 120.0 ) );
      |                               ^~~~~
qwt_magnifier.cpp:443:26: error: 'class QWheelEvent' has no member named 'delta'
  443 |         if ( wheelEvent->delta() > 0 )
      |                          ^~~~~
(const QPointF&, double) const
qwt_dyngrid_layout.cpp:
:6240: release/qwt_date.o] Error 1
<snip>
 qwt_plot_renderer.cpp:820:22:error:   error: marginaggregate '                                                QPainterPath clipPathQMargins' has incomplete type and cannot be defined
  820 |         QPainterPath
  562 |     int h = 2 * clipPathmargin;
      |
      |                 ^~~~~~~~^~~~~~

      |                 QMarginsqwt_plot_renderer.cpp:844:22:
 error: mingw32-make[2]: *** [Makefile.Release:8001: release/qwt_painter_command.o] Error 1
aggregate 'QPainterPath clipPath' has incomplete type and cannot be defined
  844 |         QPainterPath clipPath;
      |                      ^~~~~~~~
qwt_plot_renderer.cpp:851:25: warning: 'QVariant::Type QVariant::type() const' is deprecated: Use typeId() or metaType(). [-Wdeprecated-declarations]
  851 |             if ( fw.type() == QVariant::Int )
      |                  ~~~~~~~^~
In file included from qwt_legend_data.h:16,
                 from qwt_plot_item.h:15,
                 from qwt_plot_dict.h:15,
                 from qwt_plot.h:15:
C:/Qt/6.8.2/mingw_64/include/QtCore/qvariant.h:433:10: note: declared here
  433 |     Type type() const
      |          ^~~~
qwt_plot_renderer.cpp:889:35: warning: 'QVariant::Type QVariant::type() const' is deprecated: Use typeId() or metaType(). [-Wdeprecated-declarations]
  889 |             if ( borderRadius.type() == QVariant::Double
      |                  ~~~~~~~~~~~~~~~~~^~
C:/Qt/6.8.2/mingw_64/include/QtCore/qvariant.h:433:10: note: declared here
  433 |     Type type() const
      |          ^~~~
mingw32-make[2]: *** [Makefile.Debug:14927: debug/qwt_plot_spectrogram.o] Error 1
mingw32-make[2]: *** [Makefile.Release:14927: release/qwt_plot_spectrogram.o] Error 1
mingw32-make[2]: *** [Makefile.Debug:21878: debug/qwt_wheel.o] Error 1
mingw32-make[2]: *** [Makefile.Debug:21665: debug/qwt_thermo.o] Error 1
mingw32-make[2]: *** [Makefile.Debug:6707: debug/qwt_dyngrid_layout.o] Error 1
mingw32-make[2]: *** [Makefile.Release:6707: release/qwt_dyngrid_layout.o] Error 1
mingw32-make[2]: *** [Makefile.Release:12150: release/qwt_plot_renderer.o] Error 1
mingw32-make[2]: Leaving directory 'c:/Users/cedric/Downloads/qwt-6.1.4/qwt-6.1.4/src'
mingw32-make[1]: *** [Makefile:49: release-all] Error 2
mingw32-make[1]: *** Waiting for unfinished jobs....
mingw32-make[2]: *** [Makefile.Debug:12150: debug/qwt_plot_renderer.o] Error 1
mingw32-make[2]: Leaving directory 'c:/Users/cedric/Downloads/qwt-6.1.4/qwt-6.1.4/src'
mingw32-make[1]: *** [Makefile:63: debug-all] Error 2
mingw32-make[1]: Leaving directory 'c:/Users/cedric/Downloads/qwt-6.1.4/qwt-6.1.4/src'
mingw32-make: *** [Makefile:53: sub-src-make_first-ordered] Error 2

c:\Users\cedric\Downloads\qwt-6.1.4\qwt-6.1.4>

Christian Ehrlicher

You will need at least Qwt 6.2 if you want to use it with Qt6.

Cedric-air

Thank you. I see the link to latest is outdated on sourceforge, it points to 6.1.4, while the latest version is 6.3.0
https://sourceforge.net/projects/qwt/files/qwt/

I'll try again.

Cedric-air

It works. Thanks again.