rotate a Qlabel

benamiar

Hello guys i'm trying to rotate a text on my Qlabel and nothing it works all methods i found on the internet didn't works so i used QGraphicsScene . this is one of the methode i found on the interenet and that worked for someone but perhaps i'm using it in a wrong way, even if i don't know how am I using it wrongly

QLabel* m_memoryCapacity = new QLabel("");
    QVBoxLayout* vboxAlignement  = new QVBoxLayout();
    vboxAlignement->addWidget(m_memoryCapacity);
    vboxAlignement->addStretch(1);
.....

m_memoryCapacity->setText(o_l_memoryValue); //o_l_memoryValue is my label
 
QGraphicsScene scene;
QGraphicsProxyWidget  * proxy = scene.addWidget(o_l_memoryValue);
proxy->setRotation(-45);
QGraphicsView view(&scene);
view.show();

it gave me this error QGraphicsProxyWidget::setWidget: cannot embed widget 0x3ccf8f0 which is not a toplevel widget, and is not a child of an embedded widget

jsulm

@benamiar Did you set parent for o_l_memoryValue? If so try without parent.

benamiar

@benamiar said in rotate a Qlabel:

m_memoryCapacity

i tried but still not working with that methode so i used the draw event methode so redraw my Label. so now it's working but not with QGraphicScene

Q2VerticalLabel::Q2VerticalLabel(QString text)
    {
    setFixedSize(80,250);
    setText(text);

    }

void Q2VerticalLabel::setVerticalLabelFont(QFont font)
    {
    setFont(font);
    }

void Q2VerticalLabel::setVerticalLabelText(QString text)
    {
    setText(text);
    }

void Q2VerticalLabel::paintEvent(QPaintEvent* event) {

    QStylePainter painter(this);

    painter.translate(rect().center());
    painter.rotate(90);
    painter.translate(-rect().center());

    painter.drawText(0, 0, text());
}

SGaist

Hi,

Why are you using a QLabel rather than a QGraphicsTextItem ?