When i have more than one QLabel in QWidget - only one is showing

[moominek]

Hello
When I add to QWidget (QGraphics scene on widget) more than one QLabel:

...
scene = new QGraphicsScene(this);

QGraphicsView * graphicsView = new QGraphicsView(scene);
QBoxLayout * layout = new QVBoxLayout;
...

for(int i=0; i<=10; ++i){
        QLabel * label = new QLabel(QString::number((10-i)%10));
        label->setStyleSheet(sheetstyle);
        label->setAlignment(Qt::AlignCenter);
        label->setFont(font);
        label->setGeometry(0, (i * labelHeight) ,labelWidth,labelHeight * 0.8);
        label->show();
        scene->addWidget(label);
    }

...
layout->addWidget(graphicsView);
setLayout(layout);

Only one is visible . When durring animation (or when i use scroll bar) visible QLabel becomes invisible, another one QLabel
appears.

Widget have't got any set flags or atributes. Main Windows type is popup.

Maybe anyone know what is wrong?

[mrjj]

@moominek said:
Hi
Are you 100% sure they dont overlap?

is labelHeight some ok value?
try with move()

[moominek]

Yes i'm sure.
I wan't to make Widget which lookslike this:

0
9
8
7
6
5
4
3
2
1
0

And it is creating (it is embded in QWidget with lowe height. I Want to have only one digit, and when state change I want move widget up or down to show other digit). When I animate my widget next digit is showing, after previous digit goes out view. But in my project digit should change smoothly.

[mrjj]

Hi
Your code works for a normal widget.

I wonder if addWidget(label); does use x,y of Geometry.
I think it stacks them all once inserted.

have you inserted 2 labels with very different pos and seen that it does
indeed use x,y ?

[moominek]

I add :

qDebug() << "x:" <<label->x() << "y:" << label->y();

and the results:

x: 0 y: 0
x: 0 y: 270
x: 0 y: 540
x: 0 y: 810
x: 0 y: 1080
x: 0 y: 1350
x: 0 y: 1620
x: 0 y: 1890
x: 0 y: 2160
x: 0 y: 2430
x: 0 y: 2700

I think is everything ok with x and y.

[mrjj]

hi
I tested in Diagramscene sample and your code does show
as expected
http://postimg.org/image/ddr5urlf5/

[moominek]

Ok. I have previous version of this program. And it's works. I don't know why :).

Is only one diffrence. In my code i don't set parent when I add Widget to another Widget.

May this influence the problem appears?

[mrjj]

well I would assume setWidget would set the parent else
the Labels would be free floating.

But in this sample here, you add directly to scene so if u in the real code

• add to another widget then yes it might be.
  try to call setParent on each label and see if it works then.