Background color

[FelixB]

Hi,

I want to change the background color of a QwtPlot. The method "setCanvasBackground" changes only the background color of the canvas. How can I change the color "under" the scales and the labels (this is normally gray)?

I tried the following snippet with no effect...

QPalette p = plot->palette();
p.setColor(QPalette::Window, background);
plot->setPalette(p);

QPalette p = plot->palette();
p.setColor(QPalette::Window, background);
plot->setPalette(p);

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if I remove "plot->" in the snippet, it works for my whole widget (including toolbar and statusbar). How can I change the color only in QwtPlot widget?

thanks!
Felix

[Uwe]

plot->setAutoFillBackground( true );
QPalette p = plot->palette();
p.setColor(QPalette::Window, background);
plot->setPalette(p);

plot->setAutoFillBackground( true );
QPalette p = plot->palette();
p.setColor(QPalette::Window, background);
plot->setPalette(p);

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Uwe

[FelixB]

thank you!

[mqt]

That was not helpping to make entire plot (including label background) white. Following code helpped me. But still I am getting a shadow line at left and top. Is there a way to get rid of that also?

setCanvasBackground(QColor(Qt::white));
setStyleSheet("background-color:white;");

[Uwe]

plot->setAutoFillBackground( true );
plot->setPalette( Qt::white );
plot->setCanvasBackground( Qt::white );
 
QwtPlotCanvas *canvas = dynamic_cast<QwtPlotCanvas *>( plot->canvas() );
canvas->setFrameStyle( QFrame::NoFrame );

plot->setAutoFillBackground( true );
plot->setPalette( Qt::white );
plot->setCanvasBackground( Qt::white );

QwtPlotCanvas *canvas = dynamic_cast<QwtPlotCanvas *>( plot->canvas() );
canvas->setFrameStyle( QFrame::NoFrame );

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Better don't use style sheets for silly operations like this one. In rare situations they might have a negative impact on the performance ( full repaints instead of partial updates ) - and of course they are conflicting with the concept of palettes.

Uwe