QMainWindow - issue

[sajis997]

Hello forum

I have subclass the QMainWindow and it contains another widget as a central widget. The size of the central widget depends on the size of the widget. I am trying to set the widget size inside the constructor of the subclassed QMainWindow.

//GETTING ERROR ON THE FOLLOWING TWO LINES
    int width = sizeHint().width(); 
    int height = sizeHint().height();
 
    //set width and height of the glwindow  - WHICH IS THE WIDGET OF ANOTHER TYPE
    m_glWindow->width->setValue(width);
    m_glWindow->height->setValue(height);
 
    setCentralWidget(m_glWindow);

//GETTING ERROR ON THE FOLLOWING TWO LINES
    int width = sizeHint().width(); 
    int height = sizeHint().height();

    //set width and height of the glwindow  - WHICH IS THE WIDGET OF ANOTHER TYPE
    m_glWindow->width->setValue(width);
    m_glWindow->height->setValue(height);

    setCentralWidget(m_glWindow);

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The error that i got is :

H3DMainWindow.cpp:24: warning:   when initialized here
H3DMainWindow.cpp:52: error: request for member ‘width’ is ambiguous
/usr/local/Trolltech/Qt-4.8.0/include/QtGui/qpaintdevice.h:91: error: candidates are: int QPaintDevice::width() const
/usr/local/Trolltech/Qt-4.8.0/include/QtGui/qwidget.h:1026: error:                 int QWidget::width() const
/usr/local/include/H3D/H3DWindowNode.h:267: error:                 std::auto_ptr<H3D::SFInt32> H3D::H3DWindowNode::width
H3DMainWindow.cpp:53: error: request for member ‘height’ is ambiguous
/usr/local/Trolltech/Qt-4.8.0/include/QtGui/qpaintdevice.h:92: error: candidates are: int QPaintDevice::height() const
/usr/local/Trolltech/Qt-4.8.0/include/QtGui/qwidget.h:1029: error:                 int QWidget::height() const
/usr/local/include/H3D/H3DWindowNode.h:273: error:                 std::auto_ptr<H3D::SFInt32> H3D::H3DWindowNode::height
H3DMainWindow.cpp: At global scope:
H3DMainWindow.cpp:369: warning: unused parameter ‘fileName’
make: *** [H3DMainWindow.o] Error 1
sajjad@sajjad:~/Documents/H3DViewer$

H3DMainWindow.cpp:24: warning:   when initialized here
H3DMainWindow.cpp:52: error: request for member ‘width’ is ambiguous
/usr/local/Trolltech/Qt-4.8.0/include/QtGui/qpaintdevice.h:91: error: candidates are: int QPaintDevice::width() const
/usr/local/Trolltech/Qt-4.8.0/include/QtGui/qwidget.h:1026: error:                 int QWidget::width() const
/usr/local/include/H3D/H3DWindowNode.h:267: error:                 std::auto_ptr<H3D::SFInt32> H3D::H3DWindowNode::width
H3DMainWindow.cpp:53: error: request for member ‘height’ is ambiguous
/usr/local/Trolltech/Qt-4.8.0/include/QtGui/qpaintdevice.h:92: error: candidates are: int QPaintDevice::height() const
/usr/local/Trolltech/Qt-4.8.0/include/QtGui/qwidget.h:1029: error:                 int QWidget::height() const
/usr/local/include/H3D/H3DWindowNode.h:273: error:                 std::auto_ptr<H3D::SFInt32> H3D::H3DWindowNode::height
H3DMainWindow.cpp: At global scope:
H3DMainWindow.cpp:369: warning: unused parameter ‘fileName’
make: *** [H3DMainWindow.o] Error 1
sajjad@sajjad:~/Documents/H3DViewer$

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Any hint to get around ?



Regards
Sajjad

[ChrisW67]

I think you will find that the error messages are related to the later two lines:

//set width and height of the glwindow  - WHICH IS THE WIDGET OF ANOTHER TYPE
    m_glWindow->width->setValue(width);
    m_glWindow->height->setValue(height);

//set width and height of the glwindow  - WHICH IS THE WIDGET OF ANOTHER TYPE
    m_glWindow->width->setValue(width);
    m_glWindow->height->setValue(height);

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and that the m_glWindow widget (a QGLWidget perhaps?) has no member variable called width/height. When the compiler looks for "width" it finds two options and doesn't know which you mean. (How you arrived at the code you wrote is a mystery to me.) I think you probably wanted:

m_glWindow->resize(width, height);

m_glWindow->resize(width, height);

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The exercise is probably pointless because making the m_glWindow the centralWidget() will make it fill the client area of the main window anyway. It may also adjust the size hint.