C++ (Cpp) QLayout::parent Examples

Example #1

File: formbuilder.cpp Project: NikhilNJ/screenplay-dx

/*!
    \internal
*/
QLayout *QFormBuilder::createLayout(const QString &layoutName, QObject *parent, const QString &name)
{
    QLayout *l = 0;

    QWidget *parentWidget = qobject_cast<QWidget*>(parent);
    QLayout *parentLayout = qobject_cast<QLayout*>(parent);

    Q_ASSERT(parentWidget || parentLayout);

#define DECLARE_WIDGET(W, C)
#define DECLARE_COMPAT_WIDGET(W, C)

#define DECLARE_LAYOUT(L, C) \
    if (layoutName == QLatin1String(#L)) { \
        Q_ASSERT(l == 0); \
        l = parentLayout \
            ? new L() \
            : new L(parentWidget); \
    }

#include "widgets.table"

#undef DECLARE_LAYOUT
#undef DECLARE_COMPAT_WIDGET
#undef DECLARE_WIDGET

    if (l) {
        l->setObjectName(name);
        if (parentLayout) {
            QWidget *w = qobject_cast<QWidget *>(parentLayout->parent());
            if (w && w->inherits("Q3GroupBox")) {
                l->setContentsMargins(w->style()->pixelMetric(QStyle::PM_LayoutLeftMargin),
                                    w->style()->pixelMetric(QStyle::PM_LayoutTopMargin),
                                    w->style()->pixelMetric(QStyle::PM_LayoutRightMargin),
                                    w->style()->pixelMetric(QStyle::PM_LayoutBottomMargin));
                QGridLayout *grid = qobject_cast<QGridLayout *>(l);
                if (grid) {
                    grid->setHorizontalSpacing(-1);
                    grid->setVerticalSpacing(-1);
                } else {
                    l->setSpacing(-1);
                }
                l->setAlignment(Qt::AlignTop);
            }
        }
    } else {
        qWarning() << QCoreApplication::translate("QFormBuilder", "The layout type `%1' is not supported.").arg(layoutName);
    }

    return l;
}