QGraphicsView with QPixMap Background
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"QGraphicsScene::drawBackground()":http://doc.trolltech.com/latest/qgraphicsscene.html#drawBackground?
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If i follow you and the doc, I've got to overload this method.
I would do that@void custom_view::drawBackground(QPainter *p, const QRectF &rect)
{
QpixMap Background("./toto.png");
p->drawPixmap(QRect(0, 0, width(), height()), Background);
}
@
And then call it into the constructor.Am I right?
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No, don't call it in the constructor. Just pass the scene to the view.
You might want to cache the image, as to prevent unnecessary disk access, but that's for later I guess. You should probably learn more about the "graphics/view framework":http://doc.trolltech.com/latest/graphicsview.html.
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You can also use stylesheet (set the image of interest as border-image) and apply it on graphicsview. This can be the case if you are interested in applying the pixmap in QGraphicsPixmapItem rather than the item itself.
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In fact, I thought about using stylesheets but I my case I don't know if it's possible.
See, I don't use a file for the pixmap, but the method grabWidget which catches a widget appearance into a QPixMap. That way, I don't have a absolute path to put to the stylesheet.
Is it possible to use the stylesheet tho? -
Stylesheet is file agnostic. You can do
@setStyleSheet("background-image:your_pixmap_path");@Else go with drawBackground.
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When you say your_pixmap_path, you talk about a real path don't you.
What I would like to do would be something like :(this is a simplied code of course)
in the main window class :@QMdiArea mdi;
setCentralWidget(mdi)
QPixmap pix = QPixmap::grabWidget(mdi);
this->setStyleSheet("background-image:" + pix);@This does not work but is there a similar way to do it?
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Yes, it is real path. You can say pix.save("your_pixmap_path.png") and use it in styleSheet