how do i perform autoscroll in QTablewidget ? so it'll scroll down to bottom with a constant speed

[Redho B N]

yea exactly like that, im gonna try that thanks

[Redho B N]

just to make it clear i want the table scroll down as its own just like a movie credit

[farhanrbn]

This post is deleted!

[mrjj]

Hi
Fast test
i have
ui->listWidget->setVerticalScrollMode(QAbstractItemView::ScrollPerPixel);
on.

void MainWindow::on_pushButton_released(){

    auto timer = new QTimer(this);
    connect(timer, &QTimer::timeout, this, [this](){
        auto bar = ui->listWidget->verticalScrollBar();
        bar->setValue( bar->value() + 1 );
    });

   timer->start(100);
}

[VRonin]

What about https://doc.qt.io/qt-5/qpropertyanimation.html ?

void MainWindow::on_pushButton_released(){
auto anim = new QPropertyAnimation(ui->listWidget->verticalScrollBar(),"value",this);
anim ->setDuration(10000);
anim->setStartValue(ui->listWidget->verticalScrollBar()->value());
anim->setEndValue(ui->listWidget->verticalScrollBar()->maximum());
connect(anim,&QAbstractAnimation::finished,anim,&QObject::deleteLater);
anim->start();
}

[mrjj]

@VRonin
That actually runs nicer :)

[Redho B N]

@VRonin @mrjj WOW THANKS THATS EXACTLY LIKE I NEEDED THANKS A LOTT!!
oh yea and one more thing i've tried to make it loopin ands make it scroll to the top again by puttin theese lines after the anim->start();
if (tableWidget->verticalScrollBar()->maximum())
{
tableWidget->verticalScrollBar()->setSliderPosition(tableWidget->verticalScrollBar()->minimum());

}
but it wont loopin am i wrong to put that there?

[hskoglund]

Hi, when the animation stops at the bottom it's deleted, so if you want to loop it, you need to create/new up another one by doing all the steps again:

auto anim = new QPropertyAnimation(ui->listWidget->verticalScrollBar(),"value",this);
anim ->setDuration(10000);
... etc etc

[Redho B N]

@hskoglund so i need to to write thoose line again in order to make it loop?
and it will lopp as much as i write it or something like that?

[VRonin]

scroll to the top with animation:

void MainWindow::on_pushButton_released(){
    auto anim = new QPropertyAnimation(ui->listWidget->verticalScrollBar(),"value",this);
    anim ->setDuration(10000);
    anim->setStartValue(ui->listWidget->verticalScrollBar()->value());
    anim->setEndValue(ui->listWidget->verticalScrollBar()->maximum());
    bool* once =new bool(true);
    connect(anim,&QAbstractAnimation::finished,[anim,this,once]()->void{
    if(!once) 
        return;
        *once=false;
        anim->setStartValue(ui->listWidget->verticalScrollBar()->value());
        anim->setEndValue(ui->listWidget->verticalScrollBar()->minimum());
        connect(anim,&QAbstractAnimation::finished,anim,&QObject::deleteLater);
        connect(anim,&QAbstractAnimation::finished,anim,[once](){delete once;});
        anim->start();
    });
    anim->start();
}

Scroll to the top immediately

void MainWindow::on_pushButton_released(){
    auto anim = new QPropertyAnimation(ui->listWidget->verticalScrollBar(),"value",this);
    anim ->setDuration(10000);
    anim->setStartValue(ui->listWidget->verticalScrollBar()->value());
    anim->setEndValue(ui->listWidget->verticalScrollBar()->maximum());
    connect(anim,&QAbstractAnimation::finished, ui->listWidget->verticalScrollBar(),std::bind(&QScrollBar::setValue,ui->listWidget->verticalScrollBar(),ui->listWidget->verticalScrollBar()->minimum()));
    connect(anim,&QAbstractAnimation::finished,anim,&QObject::deleteLater);
    anim->start();
}

[Redho B N]

@VRonin WOW YOURE A GOD!!! THNX ALOTT!!!