QPropertyAnimation can't used to Qtabwidget

hezf

I want to hide the Qtabwidget
So I used QPropertyAnimation to make Qtabwidget's width is 0 in 400ms
but the tabwidget will rebound
the tabwidget's sizepolicy is expanding
other widget is okay,like Qframe,buton.....
I don't know how to do that

//frame_2 has the tabwidget
    QPropertyAnimation *animation= new QPropertyAnimation(ui->frame_2,"geometry");
    animation->setDuration(400);
    animation->setStartValue(ui->frame_2->geometry());
    if(expanded){
        animation->setEndValue(QRect(0,0, 0, ui->frame_2->height()));
    }
    else {
        animation->setEndValue(QRect(0,0, 500, ui->frame_2->height()));
    }

Devopia53

@hezf
Hi,
Do you have a layout for the QTabWidget?
If you have a layout, the QTabWidget will re-arranged by layout.

hezf

@Devopia53
yes,I used layout
but why others is okay?like qpushbutton...
and if I don't use a layout ,what Can I do for layout ?
Thank you for your answer.

Devopia53

@hezf
If parent widget changed(like size), other widgets will re-arranged also.
You should remove layout of QFrame and then use hide()/show() for QFrame.

Ex)

[...] 
// set up animation, frame has the QTabWidget
    animation= new QPropertyAnimation(ui->frame, "geometry");
    animation->setDuration(400);
    animation->setStartValue(ui->frame->geometry());
    animation->setEndValue(QRect(ui->frame->x(), ui->frame->y(), 0, ui->frame->height()));
    connect(animation, &QPropertyAnimation::finished,
            [&]{ if (animation->direction() == QPropertyAnimation::Forward) {
            ui->frame->hide();
            animation->setDirection(QPropertyAnimation::Backward);
        }
        else
            animation->setDirection(QPropertyAnimation::Forward);
    });

[...]

// start animation
    if (animation->direction() == QPropertyAnimation::Backward)
        ui->frame->show();
    animation->start();

hezf

@Devopia53
thank you,I will try it.

hezf

@Devopia53
Hi,
Can you send me the project?
hezf@boltit.cn