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:

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.

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