Scrollable QGraphicsItem ?

[MajidKamali]

Hi.
How can I create a Scrollable GraphicsItem? I derived my class from QScrollArea and QGraphicsItem.
I did not set any widget for my class, but added some QGraphicsItems in a QList and set those parent as my class. viewportHint function returns, boundingRect, but no scrolling or scrollbars.

Thanks.

[SGaist]

Hi,

Are you going to put widgets in that scroll area ? If so, you can use the QGraphicsWidgetProxyItem

[MajidKamali]

I'm going to add some QGraphicsItems in that scroll area.
I can not find QGraphicsWidgetProxyItem class in documentation. I'm using Qt 5.4.1

How about nesting a QGraphicsView inside my QGraphicsScene? becuase QGraphicsView already is scrollable.
does it have good performance?

[Asperamanca]

Could you describe what you are trying to achieve? Take a look at the "40000 chips" demo sample. Does this do what you need?

[MajidKamali]

@Asperamanca I am going to create a listview-like horizontal list, showing 3 items at a time; which, center item is bigger than two other items. animating scaling of items on scroll.

[SGaist]

My bad it was QGraphicsProxyWidget that I was thinking about.

That kind of things is generally easier to do with QtQuick

[MajidKamali]

@SGaist I created exactly what I want in QtQuick, but I can not integrate that component in QGraphicsView. I searched a lot, but it seems that it can not be done :(

[SGaist]

You can try with a QQuickWidget but I don't know if it would work that well. Depending on your application, you should maybe consider a full QtQuick UI.

[MajidKamali]

@SGaist I tested this solution too. widget is shown, but no update. when I resize the window, it updates.
changing QGraphicsView::updateMode did not help.

[SGaist]

What should the rest of your scene show ?

[MajidKamali]

@SGaist Some other UIs that I created with Graphics Framwork classes, like QGraphicsSvgItem

[SGaist]

You can also show SVG images on a QtQuick UI