C++ (Cpp) DataLayout::addSpacer示例

DefaultDataForm::DefaultDataForm(const DataItem &item) :
	m_widget(0),
	m_isChanged(false),
	m_incompleteWidgets(0),
	m_buttonsBox(0),
	m_hasSubitems(item.hasSubitems() || item.isAllowedModifySubitems())
{
	DataLayout *dataLayout = 0;
	QVBoxLayout *layout = 0;
	setObjectName(item.name());
	setWindowTitle(item.title());
	if (item.isAllowedModifySubitems()) {
		layout = new QVBoxLayout(this);
		ModifiableWidget *w = new ModifiableWidget(item, this, this);
		m_widget = w;
		layout->addWidget(w);
		if (!w->isExpandable()) {
			QSpacerItem *spacer = new QSpacerItem(0, 0, QSizePolicy::Minimum, QSizePolicy::Expanding);
			layout->addItem(spacer);
		}
	} else {
		dataLayout = new DataLayout(item, this, item.property<quint16>("columns", 1), this);
		QVariant spacing = item.property("horizontalSpacing");
		if (spacing.canConvert(QVariant::Int))
			dataLayout->setHorizontalSpacing(spacing.toInt());
		spacing = item.property("verticalSpacing");
		if (spacing.canConvert(QVariant::Int))
			dataLayout->setVerticalSpacing(spacing.toInt());

		m_widget = dataLayout;
		if (item.hasSubitems())
			dataLayout->addDataItems(item.subitems());
		else
			dataLayout->addDataItem(item);
		if (!dataLayout->isExpandable())
			dataLayout->addSpacer();
	}
}