Qt - C++ - ScrollArea - Resize content widgets by keeping the aspect ratio

[Vildnex]

I'm new to Qt and I've encountered the following problem.

I have a layout that looks like this.

Where:

Blue: rectangle it's a ScrollArea

Orange: rectangles are the widgets from that ScrollArea

345ZZ.png


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The problem arises when I'm trying to resize the window. In the moment of resizing, I want my widgets to keep their aspect ratio. But that's not going to happen.

Cases:

• If I will scale my application vertically my widgets are going to get way higher then they should. Instead, they should keep their current size because any vertical scaling will destroy they
• the same goes also for horizontal scaling
• at the same time if I will scale on horizontal and vertical at the same time I should get the same number of elements from that scroll area on the view. Doesn't matter the size of them

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Now my question arises... this resizing problem is caused by the scroll area or by the widget itself? How can I fix this?


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My code:

ui->setupUi(this);
 
    ui->scrollArea->setWidgetResizable(true);
 
    for (auto i = 0; i < 10; ++i) {
        auto *targetWidget = new PolygonButtonWidget();//let it be target object
        ui->scrollAreaWidgetContents->layout()->addWidget(targetWidget);
    }
    QScroller::grabGesture(ui->scrollArea, QScroller::LeftMouseButtonGesture);

ui->setupUi(this);
    
    ui->scrollArea->setWidgetResizable(true);
    
    for (auto i = 0; i < 10; ++i) {
        auto *targetWidget = new PolygonButtonWidget();//let it be target object
        ui->scrollAreaWidgetContents->layout()->addWidget(targetWidget);
    }
    QScroller::grabGesture(ui->scrollArea, QScroller::LeftMouseButtonGesture);

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Does anyone know how can I achieve my wanted result?

[Ginsengelf]

Hi, you can try QWidget::hasHeightForWidth() and QWidget::heightForWidth() to "return preferred height for this widget, given the width w."

Ginsengelf

[Vildnex]

is not actually working because that ORANGE widget which needs to be resized needs to be inside of a layout. Well in my case is not, so hasHeightForWidth is going to return all the times false