Use animation and drop-shadow in sequence

jensen82

Hi,

i want a drop-shadow-widget. I want to mix it with a fade-in effect. But both effects are not possible. Any solution how to set two effects?

Here's the code

WidgetDecorator::WidgetDecorator(QObject* parent)
    : QObject(parent) {}

void WidgetDecorator::addDropShadow(QWidget* widget) {
    // widget->window()->setAttribute(Qt::WA_TranslucentBackground);
    // widget->window()->setla //layout()->setMargin(50);
    QGraphicsDropShadowEffect* ef = new QGraphicsDropShadowEffect(widget);
    ef->setBlurRadius(10);
    ef->setOffset(20);
    ef->setColor(QColor(0, 0, 0, 255));
    widget->setGraphicsEffect(ef);
}

void WidgetDecorator::fadeInWidget(QWidget* widget) {
    QGraphicsOpacityEffect* mEffect = new QGraphicsOpacityEffect(widget);
    mEffect->setOpacity(1.0);
    widget->setGraphicsEffect(mEffect);

    QPropertyAnimation* animation = new QPropertyAnimation(mEffect, "opacity");
    animation->setDuration(500);
    animation->setStartValue(1.0);
    animation->setEndValue(0.0);
    // connect(animation,SIGNAL(finished()),this,SLOT(onAnimationFinished()));
    animation->start(QAbstractAnimation::DeleteWhenStopped);
    /*QSize size = widget->size();

    QPropertyAnimation* animation = new QPropertyAnimation(widget,"size");
    animation->setDuration(500);
    animation->setStartValue(QSize(0,0));
    animation->setEndValue(size);
    animation->start(QAbstractAnimation::DeleteWhenStopped);*/
}

void WidgetDecorator::fadeOutWidget(QWidget* widget) {
    QSize size = widget->size();

    QPropertyAnimation* animation = new QPropertyAnimation(widget, "size");
    animation->setDuration(1000);
    animation->setEndValue(QSize(0, 0));
    animation->setStartValue(size);
    animation->start(QAbstractAnimation::DeleteWhenStopped);
}

Now i want to call addDropShadow followed by fadeInWidget. But only the drop-shadow-effect is shown.
How can i apply both?

Thank you very much!!!

p3c0

@jensen82 Try QParallelAnimationGroup.

jensen82

Hi,

thank you. Why do i have to create a group? I have one Animation only. And one Effect.

Now i want to call addDropShadow followed by fadeInWidget.

One Animation.

J.Hilk

@jensen82

QParallelAnimationGroup you'll have to use, if you want multiple animations happen at the same time.

If I understand you correctly, you want to start a different animation once the old one finished.

You can chain them with signal/slots:

// All your animations are named the same, so I'm renaming them in this example
connect(animation1, &QPropertyAnimation::finished, [=]{animation2->start();});
connect(animation2, &QPropertyAnimation::finished, [=]{animation3->start();});

.....

jensen82

Thank you very much!