QLabel Text fade in/out

[lamp]

Hi
How to add fade in/out effect to QLabel Text ?

[tbscope]

http://doc.qt.nokia.com/4.7/qpropertyanimation.html

[lamp]

QLabel not propertyName Color or Opcity ?

[tbscope]

It has a font property, but that would not work too well with rich text in a label.
And if you want another convenience property, you can easily add one.

[lamp]

ok!

But need a property to use with QPropertyAnimation to create fade in/out animat

[tbscope]

I guess you can look here too:
http://doc.qt.nokia.com/qq/qq16-fader.html

As for the property, the font property will work, but not for richt text.

[praki]

void MainWindow::on_pushButton_clicked()
{
 
    QGraphicsOpacityEffect *effect = new QGraphicsOpacityEffect();
    ui->label->setGraphicsEffect(effect);
    QPropertyAnimation *anim = new QPropertyAnimation(effect,"opacity");
    anim->setDuration(1000);
    anim->setStartValue(1.0);
    anim->setEndValue(0.0);
    anim->setEasingCurve(QEasingCurve::OutQuad);
    connect(anim, &QPropertyAnimation::finished, [=]()
    {
        ui->label->setText("gone");
    });
 
    anim->start(QAbstractAnimation::DeleteWhenStopped);
}

void MainWindow::on_pushButton_clicked()
{

    QGraphicsOpacityEffect *effect = new QGraphicsOpacityEffect();
    ui->label->setGraphicsEffect(effect);
    QPropertyAnimation *anim = new QPropertyAnimation(effect,"opacity");
    anim->setDuration(1000);
    anim->setStartValue(1.0);
    anim->setEndValue(0.0);
    anim->setEasingCurve(QEasingCurve::OutQuad);
    connect(anim, &QPropertyAnimation::finished, [=]()
    {
        ui->label->setText("gone");
    });

    anim->start(QAbstractAnimation::DeleteWhenStopped);
}

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Hope this will help