unable to set border for canvas in qwt

[wagmare]

Hi friends/experts,

im using Qt.5.7 and qwt version 6.1.2

i tired to initialize qwt plot by following

QwtPlotLayout *pLayout = plotLayout();
    pLayout->setCanvasMargin(0);
    pLayout->setAlignCanvasToScales (true);
 
 
    //Canvas setup
    m_pCanvas = new QwtPlotCanvas();
    m_pCanvas->setFrameStyle( QFrame::Box | QFrame::Plain );
    m_pCanvas->setLineWidth( 1);
 
    m_pCanvas->setContentsMargins(0,0,0,0);
    m_pCanvas->setPaintAttribute(QwtPlotCanvas::BackingStore, false);
    m_pCanvas->setPaintAttribute(QwtPlotCanvas::Opaque, false);
    m_pCanvas->setAttribute( Qt::WA_OpaquePaintEvent, false );
 
 
    m_pCanvas->setAutoFillBackground( false);
 
    QColor background = QColor(QColor(255,255,255));
    background.setAlpha(255);
 
    QPalette palette;
    palette.setColor(QPalette::Window, background);
    setPalette(palette);
 
    setCanvasBackground (background);
    setAttribute(Qt::WA_TranslucentBackground);
 
 
    setCanvas( m_pCanvas );

QwtPlotLayout *pLayout = plotLayout();
    pLayout->setCanvasMargin(0);
    pLayout->setAlignCanvasToScales (true);


    //Canvas setup
    m_pCanvas = new QwtPlotCanvas();
    m_pCanvas->setFrameStyle( QFrame::Box | QFrame::Plain );
    m_pCanvas->setLineWidth( 1);

    m_pCanvas->setContentsMargins(0,0,0,0);
    m_pCanvas->setPaintAttribute(QwtPlotCanvas::BackingStore, false);
    m_pCanvas->setPaintAttribute(QwtPlotCanvas::Opaque, false);
    m_pCanvas->setAttribute( Qt::WA_OpaquePaintEvent, false );

    
    m_pCanvas->setAutoFillBackground( false);

    QColor background = QColor(QColor(255,255,255));
    background.setAlpha(255);

    QPalette palette;
    palette.setColor(QPalette::Window, background);
    setPalette(palette);

    setCanvasBackground (background);
    setAttribute(Qt::WA_TranslucentBackground);


    setCanvas( m_pCanvas );

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but line width or border of canvas is not visible at all.

i tired setting canvas color

as
QPalette p = palette();
p.setColor(QPalette::Window, color);

canvas()->setPalette(p);
canvas()->setAutoFillBackground(true);

but canvas color is not reflecting in the plot.

please help me and suggest me some solution. same was working in qt.4.7

[Uwe]

This line kills the border:

m_pCanvas->setContentsMargins(0,0,0,0);

In earlier Qt versions only QFrame had a contentsRect and the margins were the frame width. This has been changed with Qt4, leaving frames having this odd relationship to the margins.

Uwe