QGraphicsView scroll bars disappears

Hi,

in my scene I use to have a lot of removable items, so most of times the scene is bigger than expected, way more sometimes.

I want to solve this by updating, by code, its size qhen the user presses a button.

I'm doing:

Code:

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QRectF itemRec = m_pSkScene->itemsBoundingRect();
	m_pSkScene->setSceneRect(itemRec);
        //m_pSkScene.views().at(0)->setSceneRect(itemRec);
	ui.graphicsView->setSceneRect(itemRec);

---

it resizes right, but when an item goes out the scroll bar doesn't appears as before. Setting "scrollBarAlwaysOn" doesn't solve it.

any idea? thanks!

Some images:

first of all, the scene has few graphicsItems, and it's too large

http://img248.imageshack.us/img248/8471/28813472.jpg


So the code is executed, in order to make it smaller.

http://img4.imageshack.us/img4/2636/82546740.jpg


But, the scroll bar are disabled... and they don't enable even if I move an item outside the view.

http://img163.imageshack.us/img163/4897/78439938.jpg


Seems like I forgot something basic... but I don't know what :S

Try not to set the scene rect by using the view. Only use QGraphicsScene::setSceneRect(). And did you draw the arrows outside the bounding rect of the items?

Quote:

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Try not to set the scene rect by using the view

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I'm trying with both, and with both at the same time as well and it's the same.

Quote:

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And did you draw the arrows outside the bounding rect of the items?

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Yes, actually I can even move them. I can also create, by code, new items outside the viewport but only access to them if I resize the view manually.

Is it, for any chance, the expected behavior?

Quote:

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Originally Posted by jano_alex_es

Yes, actually I can even move them. I can also create, by code, new items outside the viewport but only access to them if I resize the view manually.

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You didn't get me right. Did you draw the arrows yourself in the paint method of a subclassed item? If so, make sure, you respect the bounding rect of that item, that you don't draw outside.

Anyway, can you make a minimal compilable example reproducing your problem.