qt_utils.h

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#ifndef COCKATRICE_QT_UTILS_H
#define COCKATRICE_QT_UTILS_H
#include <QObject>
 
namespace QtUtils
{
template <typename T> T *findParentOfType(const QObject *obj)
{
    const QObject *p = obj ? obj->parent() : nullptr;
    while (p) {
        if (auto casted = qobject_cast<T *>(const_cast<QObject *>(p))) {
            return casted;
        }
        p = p->parent();
    }
    return nullptr;
}
 
static inline void clearLayoutRec(QLayout *l)
{
    if (!l) {
        return;
    }
    QLayoutItem *it;
    while ((it = l->takeAt(0)) != nullptr) {
        if (QWidget *w = it->widget()) {
            w->deleteLater();
        }
        if (QLayout *sub = it->layout()) {
            clearLayoutRec(sub);
        }
        delete it;
    }
}
} // namespace QtUtils
 
#endif // COCKATRICE_QT_UTILS_H