How to maintain specific height to width ratio of widget in qt5?

Asked May 28 '13 at 20:48

Active May 29 '13 at 19:16

Viewed 1,390 times

I tried overriding methods hasHeightToWidth() and heightToWidth() but it didn't work for some reason. Is there some complete example that I can use?

Upd1:

class MyWidget : public QWidget {
    Q_OBJECT

public: 
    MyWidget() {
        QSizePolicy sizePolicy(QSizePolicy::Preferred, QSizePolicy::Preferred);
        sizePolicy.setHeightForWidth(true);
        setSizePolicy(sizePolicy);
    }
    bool hasHeightForWidth() const override {
        std::cout << __FUNCTION__ << std::endl;
        return true;
    }
    int heightForWidth(int w) const override {
        std::cout << __FUNCTION__ << " " << w << std::endl;
        return w;
    }
    QSize sizeHint() const override {
        return QSize(100, heightForWidth(100));
    }
};

MyWidget instances are inserted in QHBoxLayout.

I use qt5.

Debug std::cout's show that hasHeightForWidth and heightForWidth are called many times

edited May 29 '13 at 19:16

asked May 28 '13 at 20:48

alkedr

See this post: http://stackoverflow.com/questions/452333/how-to-maintain-widgets-aspect-ratio-in-qt – Phlucious May 28 '13 at 20:54
And possibly this one: http://qt-project.org/forums/viewthread/5320 – Phlucious May 28 '13 at 20:58
@Phlucious, I saw both pages, I did as written there (overrided hasHeightToWidth and heightToWidth) – alkedr May 28 '13 at 21:08
Have you also changed the sizePolicy for your widget like [this guy suggests](http://qt-project.org/forums/viewthread/5320/#31866)? – Phlucious May 29 '13 at 15:35
@Phlucious, yes, I did. Added code to question. – alkedr May 29 '13 at 19:11

How to maintain specific height to width ratio of widget in qt5?

0 Answers0