includepath problem ? error of undefined reference ...

[tonnot]

this is my pro file, in trying to test a widget placed at a knowed path.
(I'm trying to test the analogwidgets from www.3electrons.com )

TEMPLATE    = app
 INCLUDEPATH += ../AnalogWidgets/analogwidgets/analogwidgets \
                ../AnalogWidgets/analogwidgets/code
 
 HEADERS += ../AnalogWidgets/analogwidgets/analogwidgets/led.h \
    form.h
 
 SOURCES += ../AnalogWidgets/analogwidgets/code/led.cpp \
    form.cpp \
    main.cpp
 
 FORMS += \
    form.ui

TEMPLATE    = app
 INCLUDEPATH += ../AnalogWidgets/analogwidgets/analogwidgets \
                ../AnalogWidgets/analogwidgets/code

 HEADERS += ../AnalogWidgets/analogwidgets/analogwidgets/led.h \
    form.h

 SOURCES += ../AnalogWidgets/analogwidgets/code/led.cpp \
    form.cpp \
    main.cpp

 FORMS += \
    form.ui

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led.h has :
#include "widgetwithbackground.h" and this file is placed at the same location as led.h

ok, when compile I have the errors : one of them (all are similar ) are :

... line 27 : undefined reference to `WidgetWithBackground::WidgetWithBackground(QWidge t*)'

This is the 27 and more lines of led.h:

Led::Led(QWidget * parent):WidgetWithBackground(parent)
{
  m_checked = true; 
  m_color = Qt::red; 
  resize(330,330);      
}

Led::Led(QWidget * parent):WidgetWithBackground(parent)
{
  m_checked = true; 
  m_color = Qt::red; 
  resize(330,330);      
}

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Any help ?

[Leszek]

Hello.

Try smth like below.

HEADERS += ../AnalogWidgets/analogwidgets/analogwidgets/led.h \
                 ../AnalogWidgets/analogwidgets/analogwidgets/widgetwithbackground.h \
                 form.h 
 
SOURCES += ../AnalogWidgets/analogwidgets/code/led.cpp \
                  ../AnalogWidgets/analogwidgets/code/widgetwithbackground.cpp \
                 form.cpp \
                  main.cpp

HEADERS += ../AnalogWidgets/analogwidgets/analogwidgets/led.h \
                 ../AnalogWidgets/analogwidgets/analogwidgets/widgetwithbackground.h \
                 form.h 

SOURCES += ../AnalogWidgets/analogwidgets/code/led.cpp \
                  ../AnalogWidgets/analogwidgets/code/widgetwithbackground.cpp \
                 form.cpp \
                  main.cpp

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Entry "...widgetwithbackground.cpp" should be added only if you have cpp file. You didn`t write informations about it.

[tonnot]

And ... What is the intended of INCLUDEPATH ?
Thanks

[wysota]

... line 27 : undefined reference to `WidgetWithBackground::WidgetWithBackground(QWidge t*)'

This is the 27 and more lines of led.h:

Led::Led(QWidget * parent):WidgetWithBackground(parent)

Led::Led(QWidget * parent):WidgetWithBackground(parent)

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Do you understand this compiler error? Do you know which piece of code makes it appear?

[Leszek]

ok, when compile I have the errors : one of them (all are similar ) are :
... line 27 : undefined reference to `WidgetWithBackground::WidgetWithBackground(QWidge t*)'

Above message is generated by linker. Propably, linker couldn`t find definition of WidgetWithBackground(library can be missed or cpp file didn`t compile or something like that). It isn`t involve with "h" files, rather with "cpp" or "lib".