Vertical Scroll Bar to QVBoxLayout

[Rumzi]

Hi,
I am new in Qt. I want to set scrollbar to the QVBoxLayout. I have added the following code.

1. setGeometry(0, 0, 240, 320);
2. QWidget *win = new QWidget();
3. setCentralWidget(win);
4. QVBoxLayout *verBoxLayout= new QVBoxLayout(win);
5. QLabel *lbl=new QLabel(tr("Test"));
6. verBoxLayout->addWidget(lbl);

My question is that how to add a vertical scrollbar to the Vertical Layout and make it visible all time.

[Christian Ehrlicher]

You need to use a QScrollArea instead a QWidget as central widget.

[Shrinidhi Upadhyaya]

Hi @Rumzi , use QScrollArea, set the QWidget to it and then set the QScrollArea as centralWidget.

Here is the sample code:-

setGeometry(0, 0, 240, 320);
QWidget *window = new QWidget(this);

QVBoxLayout *vBoxLayout= new QVBoxLayout(window);

for (int i = 0; i < 20; i++)
{
    QLabel *label=new QLabel(tr("Test ") + QString::number(i));
    vBoxLayout->addWidget(label);
}

QScrollArea *scrollArea = new QScrollArea(this);
scrollArea->setWidget(window);
setCentralWidget(scrollArea);

Sample Output:-

For more information about QScrollArea[https://doc.qt.io/qt-5/qscrollarea.html]

[Rumzi]

@Shrinidhi-Upadhyaya , thanks bro. it's worked absolutely fine. I need another help to resize the scrollbar width.

[Pradeep P N]

Hi @Rumzi

You can use setStyleSheet();
Reference: Qt Style Sheets.

Example:

    QScrollArea *scrollArea = new QScrollArea(this);

    scrollArea->setStyleSheet("QScrollBar:vertical { "
                              "width: 25px; " // Change as per your requirement
                              "}");