CODEWITHSUNDEEP
qtvisibleqscrollareaqgridlayout
Gangadhar
Gangadhar

Reputation: 3

How to know if QLayoutItem is hidden by scroll in QScrollArea?

I have a similar question as asked in How to know if QListWidgetItem is hidden by scroll? and the answer to that question didn't fix my problem.

Basically I have a QScrollArea having QGridLayout. This layout has many QToolButtons. Based on some condition, all these QToolButtons need to be updated. To update all of them always is not so efficient, so I want to update only the buttons which are visible in the current active window. How can I achieve this? isVisible() doesn't help here.

Thanks in advance!

Upvotes: 0

Views: 253

Answers (1)

Lahiru Chandima
Lahiru Chandima

Reputation: 24068

You can use QWidget::visibleRegion() to check whether widget is visible and paint events can occur for widget.

if (!button->visibleRegion().isEmpty())
{
    //button is visible
}

Upvotes: 1

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