how to use QScroller::grabGesture(ui->scrollArea , QScroller::LeftMouseButtonGesture) in one or more scrollarea ?

[Ramkumar Mohan]

how to use QScroller::grabGesture(ui->scrollArea , QScroller::LeftMouseButtonGesture) in one or more scrollarea ?

[mrjj]

Hi

void MainWindow::SetupScroller()
{

    QScroller::grabGesture(ui->scrollArea->viewport(), QScroller::LeftMouseButtonGesture);
    QVariant OvershootPolicy = QVariant::fromValue<QScrollerProperties::OvershootPolicy>(QScrollerProperties::OvershootAlwaysOff);
    QScrollerProperties ScrollerProperties = QScroller::scroller(ui->scrollArea->viewport())->scrollerProperties();
    ScrollerProperties.setScrollMetric(QScrollerProperties::VerticalOvershootPolicy, OvershootPolicy);
    ScrollerProperties.setScrollMetric(QScrollerProperties::HorizontalOvershootPolicy, OvershootPolicy);
    QScroller::scroller(ui->scrollArea->viewport())->setScrollerProperties(ScrollerProperties);
]

Notice we use ui->scrollArea->viewport() as that the actual widget that is clicked on and not the scrollArea directly.
Also you might want to set Minimum Height/width for the view port as not having it being fit to the scrollArea if your use case is to have a scrollable
area that is smaller than area for the scrollArea.

[Ramkumar Mohan]

@mrjj ok, but this is used for only one scroll area for me. I want to use one or more scrollarea'a it is possible?

[mrjj]

@Ramkumar-Mohan

Yes just setup both Scrollareas
They won't scroll in sync if that is what you mean but both can scroll

void MainWindow::SetupScroller(QScrollArea *area)
{

    QScroller::grabGesture(area->viewport(), QScroller::LeftMouseButtonGesture);
    QVariant OvershootPolicy = QVariant::fromValue<QScrollerProperties::OvershootPolicy>(QScrollerProperties::OvershootAlwaysOff);
    QScrollerProperties ScrollerProperties = QScroller::scroller(area->viewport())->scrollerProperties();
    ScrollerProperties.setScrollMetric(QScrollerProperties::VerticalOvershootPolicy, OvershootPolicy);
    ScrollerProperties.setScrollMetric(QScrollerProperties::HorizontalOvershootPolicy, OvershootPolicy);
    QScroller::scroller(area->viewport())->setScrollerProperties(ScrollerProperties);
}

....
 SetupScroller(ui->scrollArea3);
 SetupScroller(ui->scrollArea_2);