abstractformbuilder.cpp

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// Copyright (C) 2020 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
 
#include "abstractformbuilder.h"
#include "formbuilderextra_p.h"
#include "resourcebuilder_p.h"
#include "textbuilder_p.h"
#include "ui4_p.h"
#include "properties_p.h"
 
#include <QtWidgets/qmainwindow.h>
#include <QtWidgets/qmenu.h>
#include <QtWidgets/qmenubar.h>
#include <QtWidgets/qstatusbar.h>
#include <QtWidgets/qtoolbar.h>
#if QT_CONFIG(mdiarea)
#  include <QtWidgets/qmdiarea.h>
#endif
#include <QtWidgets/qdockwidget.h>
#include <QtWidgets/qwizard.h>
#if QT_CONFIG(stackedwidget)
#  include <QtWidgets/qstackedwidget.h>
#endif
#if QT_CONFIG(toolbox)
#  include <QtWidgets/qtoolbox.h>
#endif
#if QT_CONFIG(tabwidget)
#  include <QtWidgets/qtabwidget.h>
#endif
#include <QtWidgets/qsplitter.h>
#include <QtWidgets/qbuttongroup.h>
#include <QtWidgets/qboxlayout.h>
#include <QtWidgets/qformlayout.h>
#include <QtWidgets/qgridlayout.h>
#include <QtWidgets/qscrollarea.h>
#if QT_CONFIG(treewidget)
#  include <QtWidgets/qtreewidget.h>
#endif
#if QT_CONFIG(listwidget)
#  include <QtWidgets/qlistwidget.h>
#endif
#include <QtWidgets/qheaderview.h>
#if QT_CONFIG(tablewidget)
#  include <QtWidgets/qtablewidget.h>
#endif
#if QT_CONFIG(combobox)
#  include <QtWidgets/qcombobox.h>
#endif
#include <QtWidgets/qpushbutton.h>
#ifndef QFORMINTERNAL_NAMESPACE
#  include <private/qlayout_p.h> // Compiling within Designer
#endif
 
#include <QtGui/qaction.h>
#include <QtGui/qactiongroup.h>
 
#include <QtCore/qcoreapplication.h>
#include <QtCore/qdebug.h>
#include <QtCore/qdir.h>
#include <QtCore/qfileinfo.h>
#include <QtCore/qhash.h>
#include <QtCore/qmetaobject.h>
#include <QtCore/qpair.h>
#include <QtCore/qqueue.h>
#include <QtCore/qvariant.h>
#include <QtCore/qxmlstream.h>
 
#include <climits>
 
#include <algorithm>
#include <iterator>
#include <memory>
 
Q_DECLARE_METATYPE(QWidgetList)
 
QT_BEGIN_NAMESPACE
 
using namespace Qt::StringLiterals;
 
static constexpr auto buttonGroupPropertyC = "buttonGroup"_L1;
 
#ifdef QFORMINTERNAL_NAMESPACE
using namespace QFormInternal;
#endif
 
using QFBE = QFormBuilderExtra;
 
static inline DomProperty *currentIndexProperty(const QList<DomProperty*> &properties)
{
    return QFBE::propertyByName(properties, "currentIndex");
}
 
class QFriendlyLayout: public QLayout
{
public:
    QFriendlyLayout() { Q_ASSERT(0); }
 
#ifdef QFORMINTERNAL_NAMESPACE
    friend class QFormInternal::QAbstractFormBuilder;
#else
    friend class QAbstractFormBuilder;
#endif
};
 
/*!
    \class QAbstractFormBuilder
 
    \brief The QAbstractFormBuilder class provides a default
    implementation for classes that create user interfaces at
    run-time.
 
    \inmodule QtDesigner
 
    QAbstractFormBuilder provides a standard interface and a default
    implementation for constructing forms from user interface
    files. It is not intended to be instantiated directly. Use the
    QFormBuilder class to create user interfaces from UI files at
    run-time. For example:
 
    \snippet lib/tools_designer_src_lib_uilib_formbuilder.cpp 0
 
    To override certain aspects of the form builder's behavior,
    subclass QAbstractFormBuilder and reimplement the relevant virtual
    functions:
 
    \list
    \li load() handles reading of UI format files from arbitrary
       QIODevices, and construction of widgets from the XML data
       that they contain.
    \li save() handles saving of widget details in UI format to
       arbitrary QIODevices.
    \li workingDirectory() and setWorkingDirectory() control the
       directory in which forms are held. The form builder looks for
       other resources on paths relative to this directory.
    \endlist
 
    The QFormBuilder class is typically used by custom components and
    applications that embed \QD. Standalone applications that need to
    dynamically generate user interfaces at run-time use the
    QUiLoader, found in the \l{Qt UI Tools} module.
 
    \sa {Qt UI Tools}
*/
 
/*!
    Constructs a new form builder.*/
QAbstractFormBuilder::QAbstractFormBuilder() : d(new QFormBuilderExtra)
{
    setResourceBuilder(new QResourceBuilder());
    setTextBuilder(new QTextBuilder());
}
 
/*!
    Destroys the form builder.*/
QAbstractFormBuilder::~QAbstractFormBuilder() = default;
 
/*!
    \fn QWidget *QAbstractFormBuilder::load(QIODevice *device, QWidget *parent)
 
    Loads an XML representation of a widget from the given \a device,
    and constructs a new widget with the specified \a parent.
 
    \sa save(), errorString()
*/
QWidget *QAbstractFormBuilder::load(QIODevice *dev, QWidget *parentWidget)
{
    std::unique_ptr<DomUI> ui(d->readUi(dev));
    if (!ui)
        return nullptr;
    QWidget *widget = create(ui.get(), parentWidget);
    if (!widget && d->m_errorString.isEmpty())
        d->m_errorString = QFormBuilderExtra::msgInvalidUiFile();
    return widget;
}
 
/*!
    \internal
*/
QWidget *QAbstractFormBuilder::create(DomUI *ui, QWidget *parentWidget)
{
    d->clear();
    if (const DomLayoutDefault *def = ui->elementLayoutDefault()) {
       d->m_defaultMargin = def->hasAttributeMargin() ? def->attributeMargin() : INT_MIN;
       d->m_defaultSpacing = def->hasAttributeSpacing() ? def->attributeSpacing() : INT_MIN;
    }
 
    DomWidget *ui_widget = ui->elementWidget();
    if (!ui_widget)
        return nullptr;
 
    initialize(ui);
 
    if (const DomButtonGroups *domButtonGroups = ui->elementButtonGroups())
        d->registerButtonGroups(domButtonGroups);
 
    if (QWidget *widget = create(ui_widget, parentWidget)) {
        // Reparent button groups that were actually created to main container for them to be found in the signal/slot part
        for (const auto &bg : std::as_const(d->buttonGroups())) {
            if (bg.second)
                bg.second->setParent(widget);
        }
        createConnections(ui->elementConnections(), widget);
        createResources(ui->elementResources()); // maybe this should go first, before create()...
        applyTabStops(widget, ui->elementTabStops());
        d->applyInternalProperties();
        reset();
        d->clear();
        return widget;
    }
    d->clear();
    return nullptr;
}
 
/*!
    \internal
    Retrieve relevant information from the custom widgets section.
    Called by create(DomUI *, QWidget *); call manually if you
    just use create(DomWidget *, QWidget *) on some child widget of DomUI.
 */
 
void QAbstractFormBuilder::initialize(const DomUI *ui)
{
    DomCustomWidgets *domCustomWidgets  = ui->elementCustomWidgets();
    createCustomWidgets(domCustomWidgets);
 
    if (domCustomWidgets) {
        const auto &customWidgets = domCustomWidgets->elementCustomWidget();
        for (const DomCustomWidget *w : customWidgets)
            d->storeCustomWidgetData(w->elementClass(), w);
    }
}
 
/*!
    \internal
*/
QWidget *QAbstractFormBuilder::create(DomWidget *ui_widget, QWidget *parentWidget)
{
    QWidget *w = createWidget(ui_widget->attributeClass(), parentWidget, ui_widget->attributeName());
    if (!w)
        return nullptr;
 
    applyProperties(w, ui_widget->elementProperty());
 
    const auto &elementAction = ui_widget->elementAction();
    for (DomAction *ui_action : elementAction) {
        QAction *child_action = create(ui_action, w);
        Q_UNUSED( child_action );
    }
 
    const auto &elementActionGroup = ui_widget->elementActionGroup();
    for (DomActionGroup *ui_action_group : elementActionGroup) {
        QActionGroup *child_action_group = create(ui_action_group, w);
        Q_UNUSED( child_action_group );
    }
 
    QWidgetList children;
    const auto &elementWidget = ui_widget->elementWidget();
    for (DomWidget *ui_child : elementWidget) {
        if (QWidget *child  = create(ui_child, w)) {
            children += child;
        } else {
            const QString className = ui_child->elementClass().value(0);
            uiLibWarning(QCoreApplication::translate("QAbstractFormBuilder", "The creation of a widget of the class '%1' failed.").arg(className));
        }
    }
 
    const auto &elementLayout = ui_widget->elementLayout();
    for (DomLayout *ui_lay : elementLayout) {
        QLayout *child_lay = create(ui_lay, nullptr, w);
        Q_UNUSED( child_lay );
    }
 
    const auto &addActions = ui_widget->elementAddAction();
    if (!addActions.isEmpty()) {
        for (DomActionRef *ui_action_ref : addActions) {
            const QString name = ui_action_ref->attributeName();
            if (name == "separator"_L1) {
                auto *sep = new QAction(w);
                sep->setSeparator(true);
                w->addAction(sep);
                addMenuAction(sep);
            } else if (QAction *a = d->m_actions.value(name)) {
                w->addAction(a);
            } else if (QActionGroup *g = d->m_actionGroups.value(name)) {
                w->addActions(g->actions());
            } else if (auto *menu = w->findChild<QMenu*>(name)) {
                w->addAction(menu->menuAction());
                addMenuAction(menu->menuAction());
            }
        }
    }
 
    loadExtraInfo(ui_widget, w, parentWidget);
    addItem(ui_widget, w, parentWidget);
 
    if (qobject_cast<QDialog *>(w) && parentWidget)
        w->setAttribute(Qt::WA_Moved, false); // So that QDialog::setVisible(true) will center it
 
    const QStringList zOrderNames = ui_widget->elementZOrder();
    if (!zOrderNames.isEmpty()) {
        auto zOrder = qvariant_cast<QWidgetList>(w->property("_q_zOrder"));
        for (const QString &widgetName : zOrderNames) {
            if (auto *child = w->findChild<QWidget*>(widgetName)) {
                if (child->parentWidget() == w) {
                    zOrder.removeAll(child);
                    zOrder.append(child);
                    child->raise();
                }
            }
        }
        w->setProperty("_q_zOrder", QVariant::fromValue(zOrder));
    }
 
    return w;
}
 
/*!
    \internal
*/
QAction *QAbstractFormBuilder::create(DomAction *ui_action, QObject *parent)
{
    QAction *a = createAction(parent, ui_action->attributeName());
    if (!a)
        return nullptr;
 
    d->m_actions.insert(ui_action->attributeName(), a);
    applyProperties(a, ui_action->elementProperty());
    return a;
}
 
/*!
    \internal
*/
QActionGroup *QAbstractFormBuilder::create(DomActionGroup *ui_action_group, QObject *parent)
{
    QActionGroup *a = createActionGroup(parent, ui_action_group->attributeName());
    if (!a)
        return nullptr;
    d->m_actionGroups.insert(ui_action_group->attributeName(), a);
    applyProperties(a, ui_action_group->elementProperty());
 
    const auto &elementAction = ui_action_group->elementAction();
    for (DomAction *ui_action : elementAction) {
        QAction *child_action = create(ui_action, a);
        Q_UNUSED( child_action );
    }
 
    const auto &elementActionGroup = ui_action_group->elementActionGroup();
    for (DomActionGroup *g : elementActionGroup) {
        QActionGroup *child_action_group = create(g, parent);
        Q_UNUSED( child_action_group );
    }
 
    return a;
}
 
// figure out the toolbar area of a DOM attrib list.
// By legacy, it is stored as an integer. As of 4.3.0, it is the enumeration value.
Qt::ToolBarArea QAbstractFormBuilder::toolbarAreaFromDOMAttributes(const DomPropertyHash &attributes)
{
    const DomProperty *attr = attributes.value("toolBarArea"_L1);
    if (!attr)
        return Qt::TopToolBarArea;
    switch(attr->kind()) {
    case DomProperty::Number:
        return static_cast<Qt::ToolBarArea>(attr->elementNumber());
    case DomProperty::Enum:
        return enumKeyOfObjectToValue<QAbstractFormBuilderGadget, Qt::ToolBarArea>("toolBarArea",
                                                                                   attr->elementEnum().toLatin1().constData());
    default:
        break;
    }
    return Qt::TopToolBarArea;
}
 
/*!
    \internal
*/
bool QAbstractFormBuilder::addItem(DomWidget *ui_widget, QWidget *widget, QWidget *parentWidget)
{
    const DomPropertyHash attributes = propertyMap(ui_widget->elementAttribute());
 
    if (parentWidget == nullptr)
        return true;
    // Check special cases. First: Custom container
    const QString className = QLatin1StringView(parentWidget->metaObject()->className());
    const QString addPageMethod = d->customWidgetAddPageMethod(className);
    if (!addPageMethod.isEmpty()) {
        // If this fails ( non-existent or non-slot), use ContainerExtension in Designer, else it can't be helped
        return QMetaObject::invokeMethod(parentWidget, addPageMethod.toUtf8().constData(), Qt::DirectConnection, Q_ARG(QWidget*, widget));
    }
 
    if (auto *mw = qobject_cast<QMainWindow*>(parentWidget)) {
 
#if QT_CONFIG(menubar)
        // the menubar
        if (auto *menuBar = qobject_cast<QMenuBar*>(widget)) {
            mw->setMenuBar(menuBar);
            return true;
        }
#endif
 
#if QT_CONFIG(toolbar)
        // apply the toolbar's attributes
        if (auto *toolBar = qobject_cast<QToolBar*>(widget)) {
            mw->addToolBar(toolbarAreaFromDOMAttributes(attributes), toolBar);
            // check break
            if (const DomProperty *attr = attributes.value("toolBarBreak"_L1))
                if (attr->elementBool() == "true"_L1)
                    mw->insertToolBarBreak (toolBar);
 
            return true;
        }
#endif
 
#if QT_CONFIG(statusbar)
        // statusBar
        if (auto *statusBar = qobject_cast<QStatusBar*>(widget)) {
            mw->setStatusBar(statusBar);
            return true;
        }
#endif
 
#if QT_CONFIG(dockwidget)
        // apply the dockwidget's attributes
        if (auto *dockWidget = qobject_cast<QDockWidget*>(widget)) {
            if (const DomProperty *attr = attributes.value("dockWidgetArea"_L1)) {
                auto area = static_cast<Qt::DockWidgetArea>(attr->elementNumber());
                if (!dockWidget->isAreaAllowed(area)) {
                    if (dockWidget->isAreaAllowed(Qt::LeftDockWidgetArea))
                        area = Qt::LeftDockWidgetArea;
                    else if (dockWidget->isAreaAllowed(Qt::RightDockWidgetArea))
                        area = Qt::RightDockWidgetArea;
                    else if (dockWidget->isAreaAllowed(Qt::TopDockWidgetArea))
                        area = Qt::TopDockWidgetArea;
                    else if (dockWidget->isAreaAllowed(Qt::BottomDockWidgetArea))
                        area = Qt::BottomDockWidgetArea;
                }
                mw->addDockWidget(area, dockWidget);
            } else {
                mw->addDockWidget(Qt::LeftDockWidgetArea, dockWidget);
            }
            return true;
        }
#endif
 
        if (!mw->centralWidget()) {
            mw->setCentralWidget(widget);
            return true;
        }
    }
 
#if QT_CONFIG(tabwidget)
    else if (auto *tabWidget = qobject_cast<QTabWidget*>(parentWidget)) {
        widget->setParent(nullptr);
 
        const int tabIndex = tabWidget->count();
        if (auto *titleP = attributes.value(QFormBuilderStrings::titleAttribute))
            tabWidget->addTab(widget, toString(titleP->elementString()));
        else
            tabWidget->addTab(widget, "Page"_L1);
 
        if (const auto *picon = attributes.value(QFormBuilderStrings::iconAttribute)) {
            QVariant v = resourceBuilder()->loadResource(workingDirectory(), picon);
            QVariant nativeValue = resourceBuilder()->toNativeValue(v);
            tabWidget->setTabIcon(tabIndex, qvariant_cast<QIcon>(nativeValue));
        }
 
#if QT_CONFIG(tooltip)
        if (const auto *ptoolTip = attributes.value(QFormBuilderStrings::toolTipAttribute)) {
            tabWidget->setTabToolTip(tabIndex, toString(ptoolTip->elementString()));
        }
#endif
 
#if QT_CONFIG(whatsthis)
        if (const auto *pwhatsThis = attributes.value(QFormBuilderStrings::whatsThisAttribute)) {
            tabWidget->setTabWhatsThis(tabIndex, toString(pwhatsThis->elementString()));
        }
#endif
 
        return true;
    }
#endif
 
#if QT_CONFIG(toolbox)
    else if (auto *toolBox = qobject_cast<QToolBox*>(parentWidget)) {
        const int tabIndex = toolBox->count();
        if (const auto *labelP =  attributes.value(QFormBuilderStrings::labelAttribute))
            toolBox->addItem(widget, toString(labelP->elementString()));
        else
            toolBox->addItem(widget, "Page"_L1);
 
        if (const auto *picon = attributes.value(QFormBuilderStrings::iconAttribute)) {
            QVariant v = resourceBuilder()->loadResource(workingDirectory(), picon);
            QVariant nativeValue = resourceBuilder()->toNativeValue(v);
            toolBox->setItemIcon(tabIndex, qvariant_cast<QIcon>(nativeValue));
        }
 
#if QT_CONFIG(tooltip)
        if (const auto *ptoolTip = attributes.value(QFormBuilderStrings::toolTipAttribute)) {
            toolBox->setItemToolTip(tabIndex, toString(ptoolTip->elementString()));
        }
#endif
 
        return true;
    }
#endif
 
#if QT_CONFIG(stackedwidget)
    else if (auto *stackedWidget = qobject_cast<QStackedWidget*>(parentWidget)) {
        stackedWidget->addWidget(widget);
        return true;
    }
#endif
 
#if QT_CONFIG(splitter)
    else if (auto *splitter = qobject_cast<QSplitter*>(parentWidget)) {
        splitter->addWidget(widget);
        return true;
    }
#endif
 
#if QT_CONFIG(mdiarea)
    else if (auto *mdiArea = qobject_cast<QMdiArea*>(parentWidget)) {
        mdiArea->addSubWindow(widget);
        return true;
    }
#endif
 
#if QT_CONFIG(dockwidget)
    else if (auto *dockWidget = qobject_cast<QDockWidget*>(parentWidget)) {
        dockWidget->setWidget(widget);
        return true;
    }
#endif
 
#if QT_CONFIG(scrollarea)
    else if (auto *scrollArea = qobject_cast<QScrollArea*>(parentWidget)) {
        scrollArea->setWidget(widget);
        return true;
    }
#endif
 
#if QT_CONFIG(wizard)
    else if (auto *wizard = qobject_cast<QWizard *>(parentWidget)) {
        auto *page = qobject_cast<QWizardPage*>(widget);
        if (!page) {
            uiLibWarning(QCoreApplication::translate("QAbstractFormBuilder", "Attempt to add child that is not of class QWizardPage to QWizard."));
            return false;
        }
        wizard->addPage(page);
        return true;
    }
#endif
    return false;
}
 
/*!
    \internal
*/
void QAbstractFormBuilder::layoutInfo(DomLayout *ui_layout, QObject *parent, int *margin, int *spacing)
{
    Q_UNUSED(parent);
    auto properties = ui_layout->elementProperty();
 
    int mar = INT_MIN;
    int spac = INT_MIN;
    if (const DomProperty *p = QFBE::propertyByName(properties, "margin"))
        mar = p->elementNumber();
    if (const DomProperty *p = QFBE::propertyByName(properties, "spacing"))
        spac = p->elementNumber();
 
#ifdef Q_OS_MACOS
    // here we recognize UI file < 4.3 (no we don't store margin property)
    if (mar != INT_MIN) {
        const int defaultMargin = parent->inherits("QLayoutWidget") ? 0 : 9;
        if (mar == defaultMargin)
            mar = INT_MIN;
        if (spac == 6)
            spac = INT_MIN;
 
        if (mar == INT_MIN || spac == INT_MIN) {
            for (auto it = properties.begin(); it != properties.end(); ) {
                DomProperty *prop = *it;
                if ((mar == INT_MIN && prop->attributeName() == "margin"_L1)
                    || (spac == INT_MIN && prop->attributeName() == "spacing"_L1)) {
                    delete prop;
                    it = properties.erase(it);
                } else {
                    ++it;
                }
            }
            ui_layout->setElementProperty(properties);
        }
    }
#endif
    if (margin)
        *margin = mar;
    if (spacing)
        *spacing = spac;
}
 
/*!
    \internal
*/
QLayout *QAbstractFormBuilder::create(DomLayout *ui_layout, QLayout *parentLayout, QWidget *parentWidget)
{
    QObject *p = parentLayout;
 
    if (p == nullptr)
        p = parentWidget;
 
    Q_ASSERT(p != nullptr);
 
    bool tracking = false;
 
    if (p == parentWidget && parentWidget->layout()) {
        tracking = true;
        p = parentWidget->layout();
    }
 
    QLayout *layout = createLayout(ui_layout->attributeClass(), p, ui_layout->hasAttributeName() ? ui_layout->attributeName() : QString());
 
    if (layout == nullptr)
        return nullptr;
 
    if (tracking && layout->parent() == nullptr) {
        auto *box = qobject_cast<QBoxLayout*>(parentWidget->layout());
        if (!box) {  // only QBoxLayout is supported
            const QString widgetClass = QString::fromUtf8(parentWidget->metaObject()->className());
            const QString layoutClass = QString::fromUtf8(parentWidget->layout()->metaObject()->className());
            const QString msg = QCoreApplication::translate("QAbstractFormBuilder", "Attempt to add a layout to a widget '%1' (%2) which already has a layout of non-box type %3.\n"
                                            "This indicates an inconsistency in the ui-file.").
                                            arg(parentWidget->objectName(), widgetClass, layoutClass);
            uiLibWarning(msg);
            return nullptr;
        }
        box->addLayout(layout);
    }
 
    int margin = INT_MIN, spacing = INT_MIN;
    layoutInfo(ui_layout, p, &margin, &spacing);
 
    if (margin != INT_MIN) {
        layout->setContentsMargins(margin, margin, margin, margin);
    } else {
        int left = -1, top = -1, right = -1, bottom = -1;
        layout->getContentsMargins(&left, &top, &right, &bottom);
        QFormBuilderExtra::getLayoutMargins(ui_layout->elementProperty(),
                                            &left, &top, &right, &bottom);
        layout->setContentsMargins(left, top, right, bottom);
    }
 
    if (spacing != INT_MIN) {
        layout->setSpacing(spacing);
    } else {
        auto *grid = qobject_cast<QGridLayout *>(layout);
        if (grid) {
            const auto &properties = ui_layout->elementProperty();
            if (const auto *p = QFBE::propertyByName(properties, "horizontalSpacing"))
                grid->setHorizontalSpacing(p->elementNumber());
            if (const auto *p = QFBE::propertyByName(properties, "verticalSpacing"))
                grid->setVerticalSpacing(p->elementNumber());
        }
    }
 
    applyProperties(layout, ui_layout->elementProperty());
 
    const auto &elementItem = ui_layout->elementItem();
    for (DomLayoutItem *ui_item : elementItem) {
        if (QLayoutItem *item = create(ui_item, layout, parentWidget)) {
            addItem(ui_item, item, layout);
        }
    }
    // Check the box stretch attributes
    if (auto *box = qobject_cast<QBoxLayout*>(layout)) {
        const QString boxStretch = ui_layout->attributeStretch();
        if (!boxStretch.isEmpty())
            QFormBuilderExtra::setBoxLayoutStretch(boxStretch, box);
    }
    // Check the grid stretch/minimum size attributes
    if (auto *grid = qobject_cast<QGridLayout*>(layout)) {
        // Stretch
        const QString gridRowStretch = ui_layout->attributeRowStretch();
        if (!gridRowStretch.isEmpty())
            QFormBuilderExtra::setGridLayoutRowStretch(gridRowStretch, grid);
        const QString gridColumnStretch = ui_layout->attributeColumnStretch();
        if (!gridColumnStretch.isEmpty())
            QFormBuilderExtra::setGridLayoutColumnStretch(gridColumnStretch, grid);
        // Minimum size
        const QString gridColumnMinimumWidth = ui_layout->attributeColumnMinimumWidth();
        if (!gridColumnMinimumWidth.isEmpty())
            QFormBuilderExtra::setGridLayoutColumnMinimumWidth(gridColumnMinimumWidth, grid);
        const QString gridRowMinimumHeight = ui_layout->attributeRowMinimumHeight();
        if (!gridRowMinimumHeight.isEmpty())
            QFormBuilderExtra::setGridLayoutRowMinimumHeight(gridRowMinimumHeight, grid);
    }
    return layout;
}
 
#if QT_CONFIG(formlayout)
static inline QFormLayout::ItemRole formLayoutRole(int column, int colspan)
{
    if (colspan > 1)
        return QFormLayout::SpanningRole;
    return column == 0 ? QFormLayout::LabelRole : QFormLayout::FieldRole;
}
#endif
 
static inline QString alignmentPrefix(bool fullyQualifiedEnums)
{
    return fullyQualifiedEnums ? "Qt::AlignmentFlag::"_L1 : "Qt::"_L1;
}
 
static inline QString alignmentValue(Qt::Alignment a, bool fullyQualifiedEnums)
{
    QLatin1StringView h;
    QLatin1StringView v;
    switch (a & Qt::AlignHorizontal_Mask) {
    case Qt::AlignLeft:
        h = "AlignLeft"_L1;
        break;
    case Qt::AlignRight:
        h = "AlignRight"_L1;
        break;
    case Qt::AlignHCenter:
        h = "AlignHCenter"_L1;
        break;
    case Qt::AlignJustify:
        h = "AlignJustify"_L1;
        break;
    }
    switch (a & Qt::AlignVertical_Mask) {
    case Qt::AlignTop:
        v = "AlignTop"_L1;
        break;
    case Qt::AlignBottom:
        v = "AlignBottom"_L1;
        break;
    case Qt::AlignVCenter:
        v = "AlignVCenter"_L1;
        break;
    }
    QString result;
    if (!h.isEmpty())
        result += alignmentPrefix(fullyQualifiedEnums) + h;
    if (!h.isEmpty() && !v.isEmpty())
        result += u'|';
    if (!v.isEmpty())
        result += alignmentPrefix(fullyQualifiedEnums) + v;
    return result;
}
 
static inline Qt::Alignment alignmentFromDom(const QString &in)
{
    Qt::Alignment rc;
    if (!in.isEmpty()) {
        for (const auto &f : qTokenize(in, u'|')) {
            if (f.endsWith("::AlignLeft"_L1)) {
                rc |= Qt::AlignLeft;
            } else if (f.endsWith("::AlignRight"_L1)) {
                rc |= Qt::AlignRight;
            } else if (f.endsWith("::AlignHCenter"_L1)) {
                rc |= Qt::AlignHCenter;
            } else if (f.endsWith("::AlignJustify"_L1)) {
                rc |= Qt::AlignJustify;
            } else if (f.endsWith("::AlignTop"_L1)) {
                rc |= Qt::AlignTop;
            } else if (f.endsWith("::AlignBottom"_L1)) {
                rc |= Qt::AlignBottom;
            } else if (f.endsWith("::AlignVCenter"_L1)) {
                rc |= Qt::AlignVCenter;
            }
        }
    }
    return rc;
}
 
/*!
    \internal
*/
bool QAbstractFormBuilder::addItem(DomLayoutItem *ui_item, QLayoutItem *item, QLayout *layout)
{
    // Calling addChildWidget(), etc.  is required to maintain consistency of the layouts,
    // see documentation of addItem(), which should ideally not be used.
    if (item->widget()) {
        static_cast<QFriendlyLayout*>(layout)->addChildWidget(item->widget());
    } else if (item->layout()) {
        static_cast<QFriendlyLayout*>(layout)->addChildLayout(item->layout());
    } else if (item->spacerItem()) {
        // nothing to do
    } else {
        return false;
    }
 
    if (auto *grid = qobject_cast<QGridLayout*>(layout)) {
        const int rowSpan = ui_item->hasAttributeRowSpan() ? ui_item->attributeRowSpan() : 1;
        const int colSpan = ui_item->hasAttributeColSpan() ? ui_item->attributeColSpan() : 1;
        grid->addItem(item, ui_item->attributeRow(), ui_item->attributeColumn(),
                        rowSpan, colSpan, item->alignment());
        return true;
    }
#if QT_CONFIG(formlayout)
    if (auto *form = qobject_cast<QFormLayout *>(layout)) {
        const int row =  ui_item->attributeRow();
        const int colSpan = ui_item->hasAttributeColSpan() ? ui_item->attributeColSpan() : 1;
        form->setItem(row, formLayoutRole(ui_item->attributeColumn(), colSpan), item);
        return true;
    }
 
#endif
    layout->addItem(item);
    return true;
}
 
/*!
    \internal
*/
QLayoutItem *QAbstractFormBuilder::create(DomLayoutItem *ui_layoutItem, QLayout *layout, QWidget *parentWidget)
{
    switch (ui_layoutItem->kind()) {
    case DomLayoutItem::Widget: {
        if (QWidget *w = create(ui_layoutItem->elementWidget(), parentWidget)) {
#ifdef QFORMINTERNAL_NAMESPACE // uilib
            QWidgetItem *item = new QWidgetItemV2(w);
#else                         // Within Designer: Use factory method that returns special items that refuse to shrink to 0,0
            QWidgetItem *item = QLayoutPrivate::createWidgetItem(layout, w);
#endif
            item->setAlignment(alignmentFromDom(ui_layoutItem->attributeAlignment()));
            return item;
        }
        qWarning() << QCoreApplication::translate("QAbstractFormBuilder", "Empty widget item in %1 '%2'.").arg(QString::fromUtf8(layout->metaObject()->className()), layout->objectName());
        return nullptr;
    }
    case DomLayoutItem::Spacer: {
        QSize size(0, 0);
        QSizePolicy::Policy sizeType = QSizePolicy::Expanding;
        bool isVspacer = false;
 
        const DomSpacer *ui_spacer = ui_layoutItem->elementSpacer();
        const auto &spacerProperties =  ui_spacer->elementProperty();
        if (!spacerProperties.isEmpty()) {
            for (DomProperty *p : spacerProperties) {
                const QVariant v = toVariant(&QAbstractFormBuilderGadget::staticMetaObject, p); // ### remove me
                if (v.isNull())
                    continue;
                if (p->attributeName() == "sizeHint"_L1 && p->kind() == DomProperty::Size) {
                    size = v.toSize();  // ###  remove me
                } else if (p->attributeName() == "sizeType"_L1 && p->kind() == DomProperty::Enum) {
                    sizeType = static_cast<QSizePolicy::Policy>(v.toInt());
                } else if (p->attributeName() == "orientation"_L1 && p->kind() == DomProperty::Enum) {
                    const auto o = static_cast<Qt::Orientation>(v.toInt());
                    isVspacer = (o == Qt::Vertical);
                }
            }
        }
 
        QSpacerItem *spacer = nullptr;
        if (isVspacer)
            spacer = new QSpacerItem(size.width(), size.height(), QSizePolicy::Minimum, sizeType);
        else
            spacer = new QSpacerItem(size.width(), size.height(), sizeType, QSizePolicy::Minimum);
        return spacer; }
 
    case DomLayoutItem::Layout:
        return create(ui_layoutItem->elementLayout(), layout, parentWidget);
 
    default:
        break;
    }
 
    return nullptr;
}
 
/*!
    \internal
*/
void QAbstractFormBuilder::applyProperties(QObject *o, const QList<DomProperty*> &properties)
{
    for (DomProperty *p : properties) {
        const QVariant v = toVariant(o->metaObject(), p);
        if (!v.isNull()) {
            QString attributeName = p->attributeName();
            if (attributeName == "numDigits"_L1 && o->inherits("QLCDNumber")) // Deprecated in Qt 4, removed in Qt 5.
                attributeName = u"digitCount"_s;
            if (!d->applyPropertyInternally(o, attributeName, v))
                o->setProperty(attributeName.toUtf8(), v);
        }
    }
}
 
 
/*!
    \internal
    Check whether a property is applied internally by QAbstractFormBuilder. Call this
   from overwritten applyProperties().
*/
 
bool QAbstractFormBuilder::applyPropertyInternally(QObject *o, const QString &propertyName, const QVariant &value)
{
    return d->applyPropertyInternally(o,propertyName, value);
}
 
/*!
    \internal
*/
 
QVariant QAbstractFormBuilder::toVariant(const QMetaObject *meta, DomProperty *p)
{
    return domPropertyToVariant(this, meta, p);
}
 
/*!
    \internal
*/
void QAbstractFormBuilder::setupColorGroup(QPalette &palette, QPalette::ColorGroup colorGroup,
            DomColorGroup *group)
{
    QFormBuilderExtra::setupColorGroup(&palette, colorGroup, group);
}
 
/*!
    \internal
*/
DomColorGroup *QAbstractFormBuilder::saveColorGroup(const QPalette &palette)
{
    return QFormBuilderExtra::saveColorGroup(palette,
                                             palette.currentColorGroup());
}
 
/*!
    \internal
*/
QBrush QAbstractFormBuilder::setupBrush(DomBrush *brush)
{
    return QFormBuilderExtra::setupBrush(brush);
}
 
DomBrush *QAbstractFormBuilder::saveBrush(const QBrush &br)
{
    return QFormBuilderExtra::saveBrush(br);
}
 
/*!
    \internal
*/
QWidget *QAbstractFormBuilder::createWidget(const QString &widgetName, QWidget *parentWidget, const QString &name)
{
    Q_UNUSED(widgetName);
    Q_UNUSED(parentWidget);
    Q_UNUSED(name);
    return nullptr;
}
 
/*!
    \internal
*/
QLayout *QAbstractFormBuilder::createLayout(const QString &layoutName, QObject *parent, const QString &name)
{
    Q_UNUSED(layoutName);
    Q_UNUSED(parent);
    Q_UNUSED(name);
    return nullptr;
}
 
/*!
    \internal
*/
QAction *QAbstractFormBuilder::createAction(QObject *parent, const QString &name)
{
    auto *action = new QAction(parent);
    action->setObjectName(name);
    return action;
}
 
/*!
    \internal
*/
QActionGroup *QAbstractFormBuilder::createActionGroup(QObject *parent, const QString &name)
{
    auto *g = new QActionGroup(parent);
    g->setObjectName(name);
    return g;
}
 
/*!
    \fn void QAbstractFormBuilder::save(QIODevice *device, QWidget *widget)
 
    Saves an XML representation of the given \a widget to the
    specified \a device in the standard UI file format.
 
    \note Unlike when saving a form in \QD, all property values are
    written. This is because, the state of whether a property value was
    modified or not isn't stored in the Qt property system. The widget that
    is being saved, could have been created dynamically, not loaded via
    \l load(), so in this case the form builder isn't aware of the list of
    changed properties. Also, there's no generic way to do this for widgets
    that were created dynamically.
 
    Therefore, you should remove properties that are not required from your
    resulting XML files, before loading them. Alternatively, if you already
    know which properties you want to save when you call this method,
    you can overload \c computeProperties() and return a filtered list of
    required properties. Otherwise, unexpected behavior may occur as some
    of these properties may depend on each other.
 
    \sa load()
*/
void QAbstractFormBuilder::save(QIODevice *dev, QWidget *widget)
{
    DomWidget *ui_widget = createDom(widget, nullptr);
    Q_ASSERT( ui_widget != nullptr );
 
    auto *ui = new DomUI();
    ui->setAttributeVersion(u"4.0"_s);
    ui->setElementWidget(ui_widget);
 
    saveDom(ui, widget);
 
    QXmlStreamWriter writer(dev);
    writer.setAutoFormatting(true);
    writer.setAutoFormattingIndent(1);
    writer.writeStartDocument();
    ui->write(writer);
    writer.writeEndDocument();
 
    d->m_laidout.clear();
 
    delete ui;
}
 
/*!
    \internal
*/
void QAbstractFormBuilder::saveDom(DomUI *ui, QWidget *widget)
{
    ui->setElementClass(widget->objectName());
 
    if (DomConnections *ui_connections = saveConnections()) {
        ui->setElementConnections(ui_connections);
    }
 
    if (DomCustomWidgets *ui_customWidgets = saveCustomWidgets()) {
        ui->setElementCustomWidgets(ui_customWidgets);
    }
 
    if (DomTabStops *ui_tabStops = saveTabStops()) {
        ui->setElementTabStops(ui_tabStops);
    }
 
    if (DomResources *ui_resources = saveResources()) {
        ui->setElementResources(ui_resources);
    }
    if (DomButtonGroups *ui_buttonGroups = saveButtonGroups(widget))
        ui->setElementButtonGroups(ui_buttonGroups);
}
 
/*!
    \internal
*/
DomConnections *QAbstractFormBuilder::saveConnections()
{
    return new DomConnections;
}
 
/*!
    \internal
*/
 
DomWidget *QAbstractFormBuilder::createDom(QWidget *widget, DomWidget *ui_parentWidget, bool recursive)
{
    auto *ui_widget = new DomWidget();
    ui_widget->setAttributeClass(QLatin1StringView(widget->metaObject()->className()));
    ui_widget->setAttributeName(widget->objectName());
 
    ui_widget->setElementProperty(computeProperties(widget));
 
    if (recursive) {
        if (QLayout *layout = widget->layout()) {
            if (DomLayout *ui_layout = createDom(layout, nullptr, ui_parentWidget)) {
                QList<DomLayout *> ui_layouts;
                ui_layouts.append(ui_layout);
 
                ui_widget->setElementLayout(ui_layouts);
            }
        }
    }
 
    // widgets, actions and action groups
    QList<DomWidget *> ui_widgets;
    QList<DomAction *> ui_actions;
    QList<DomActionGroup *> ui_action_groups;
 
    QObjectList children;
 
    // splitters need to store their children in the order specified by child indexes,
    // not the order of the child list.
#if QT_CONFIG(splitter)
    if (const auto *splitter = qobject_cast<const QSplitter*>(widget)) {
        const int count = splitter->count();
        for (int i = 0; i < count; ++i)
            children.append(splitter->widget(i));
    } else
#endif
    {
        QObjectList childObjects = widget->children();
 
        const auto list = qvariant_cast<QWidgetList>(widget->property("_q_widgetOrder"));
        for (QWidget *w : list) {
            if (childObjects.contains(w)) {
                children.append(w);
                childObjects.removeAll(w);
            }
        }
        children += childObjects;
 
        const auto zOrder = qvariant_cast<QWidgetList>(widget->property("_q_zOrder"));
        if (list != zOrder) {
            QStringList zOrderList;
            zOrderList.reserve(zOrder.size());
            std::transform(zOrder.cbegin(), zOrder.cend(),
                           std::back_inserter(zOrderList),
                           [] (const QWidget *w) { return w->objectName(); });
            ui_widget->setElementZOrder(zOrderList);
        }
    }
 
    for (QObject *obj : std::as_const(children)) {
        if (auto *childWidget = qobject_cast<QWidget*>(obj)) {
            if (d->m_laidout.contains(childWidget) || !recursive)
                continue;
 
            if (auto *menu = qobject_cast<QMenu *>(childWidget)) {
                const auto actions = menu->parentWidget()->actions();
                const bool found =
                    std::any_of(actions.cbegin(), actions.cend(),
                                [menu] (const QAction *a) { return a->menu() == menu; });
                if (!found)
                    continue;
            }
 
            if (DomWidget *ui_child = createDom(childWidget, ui_widget)) {
                ui_widgets.append(ui_child);
            }
        } else if (auto *childAction = qobject_cast<QAction*>(obj)) {
            if (childAction->actionGroup() != nullptr) {
                // it will be added later.
                continue;
            }
 
            if (DomAction *ui_action = createDom(childAction)) {
                ui_actions.append(ui_action);
            }
        } else if (auto *childActionGroup = qobject_cast<QActionGroup*>(obj)) {
            if (DomActionGroup *ui_action_group = createDom(childActionGroup)) {
                ui_action_groups.append(ui_action_group);
            }
        }
    }
 
    // add-action
    QList<DomActionRef *> ui_action_refs;
    const auto &actions = widget->actions();
    ui_action_refs.reserve(actions.size());
    for (QAction *action : actions) {
        if (DomActionRef *ui_action_ref = createActionRefDom(action)) {
            ui_action_refs.append(ui_action_ref);
        }
    }
 
    if (recursive)
        ui_widget->setElementWidget(ui_widgets);
 
    ui_widget->setElementAction(ui_actions);
    ui_widget->setElementActionGroup(ui_action_groups);
    ui_widget->setElementAddAction(ui_action_refs);
 
    saveExtraInfo(widget, ui_widget, ui_parentWidget);
 
    return ui_widget;
}
 
/*!
    \internal
*/
DomActionRef *QAbstractFormBuilder::createActionRefDom(QAction *action)
{
    auto *ui_action_ref = new DomActionRef();
    if (action->isSeparator()) {
        ui_action_ref->setAttributeName("separator"_L1);
    } else {
        ui_action_ref->setAttributeName(action->menu() != nullptr
                                        ? action->menu()->objectName()
                                        : action->objectName());
    }
 
    return ui_action_ref;
}
 
// Struct to store layout item parameters for saving layout items
struct FormBuilderSaveLayoutEntry {
    explicit FormBuilderSaveLayoutEntry(QLayoutItem *li = nullptr) :
        item(li) {}
 
    void setAlignment(Qt::Alignment al);
 
    QLayoutItem *item;
    int row = -1;
    int column = -1;
    int rowSpan = 0;
    int columnSpan = 0;
    Qt::Alignment alignment;
};
 
// filter out the case of "Spacer" and "QLayoutWidget" widgets
void FormBuilderSaveLayoutEntry::setAlignment(Qt::Alignment al)
{
    if (const QWidget *widget = item->widget()) {
        const char *className = widget->metaObject()->className();
        if (qstrcmp(className, "Spacer") && qstrcmp(className, "QLayoutWidget"))
            alignment = al;
    }
}
 
// Create list from standard box layout
static QList<FormBuilderSaveLayoutEntry> saveLayoutEntries(const QLayout *layout)
{
    QList<FormBuilderSaveLayoutEntry> rc;
    if (const int count = layout->count()) {
        rc.reserve(count);
        for (int idx = 0; idx < count; ++idx) {
            QLayoutItem *item = layout->itemAt(idx);
            FormBuilderSaveLayoutEntry entry(item);
            entry.setAlignment(item->alignment());
            rc.append(entry);
        }
    }
    return rc;
}
 
// Create list from grid layout
static QList<FormBuilderSaveLayoutEntry> saveGridLayoutEntries(QGridLayout *gridLayout)
{
    QList<FormBuilderSaveLayoutEntry> rc;
    if (const int count = gridLayout->count()) {
        rc.reserve(count);
        for (int idx = 0; idx < count; ++idx) {
            QLayoutItem *item = gridLayout->itemAt(idx);
            FormBuilderSaveLayoutEntry entry(item);
            gridLayout->getItemPosition(idx, &entry.row, &entry.column, &entry.rowSpan,&entry.columnSpan);
            entry.setAlignment(item->alignment());
            rc.append(entry);
        }
    }
    return rc;
}
 
#if QT_CONFIG(formlayout)
// Create list from form layout
static QList<FormBuilderSaveLayoutEntry> saveFormLayoutEntries(const QFormLayout *formLayout)
{
    QList<FormBuilderSaveLayoutEntry> rc;
    if (const int count = formLayout->count()) {
        rc.reserve(count);
        for (int idx = 0; idx < count; ++idx) {
            QLayoutItem *item = formLayout->itemAt(idx);
            QFormLayout::ItemRole role = QFormLayout::LabelRole;
            FormBuilderSaveLayoutEntry entry(item);
            formLayout->getItemPosition(idx, &entry.row, &role);
            switch (role ) {
            case QFormLayout::LabelRole:
                entry.column = 0;
                break;
            case QFormLayout::FieldRole:
                entry.column = 1;
                break;
            case QFormLayout::SpanningRole:
                entry.column = 0;
                entry.columnSpan = 2;
                break;
            }
            rc.push_back(entry);
        }
    }
    return rc;
}
#endif
 
/*!
    \internal
*/
 
DomLayout *QAbstractFormBuilder::createDom(QLayout *layout, DomLayout *ui_layout, DomWidget *ui_parentWidget)
{
    Q_UNUSED(ui_layout);
    auto *lay = new DomLayout();
    lay->setAttributeClass(QLatin1StringView(layout->metaObject()->className()));
    const QString objectName = layout->objectName();
    if (!objectName.isEmpty())
        lay->setAttributeName(objectName);
    lay->setElementProperty(computeProperties(layout));
 
    QList<FormBuilderSaveLayoutEntry> newList;
    if (auto *gridLayout = qobject_cast<QGridLayout *>(layout)) {
        newList = saveGridLayoutEntries(gridLayout);
#if QT_CONFIG(formlayout)
    } else if (const auto *formLayout = qobject_cast<const QFormLayout *>(layout)) {
        newList = saveFormLayoutEntries(formLayout);
#endif
    } else {
        newList = saveLayoutEntries(layout);
    }
 
    QList<DomLayoutItem *> ui_items;
    ui_items.reserve(newList.size());
    for (const FormBuilderSaveLayoutEntry &item : std::as_const(newList)) {
        if (DomLayoutItem *ui_item = createDom(item.item, lay, ui_parentWidget)) {
            if (item.row >= 0)
                ui_item->setAttributeRow(item.row);
            if (item.column >= 0)
                ui_item->setAttributeColumn(item.column);
            if (item.rowSpan > 1)
                ui_item->setAttributeRowSpan(item.rowSpan);
            if (item.columnSpan > 1)
                ui_item->setAttributeColSpan(item.columnSpan);
            if (item.alignment)
                ui_item->setAttributeAlignment(alignmentValue(item.alignment,
                                               d->m_fullyQualifiedEnums));
            ui_items.append(ui_item);
        }
    }
 
    lay->setElementItem(ui_items);
 
    return lay;
}
 
/*!
    \internal
*/
DomLayoutItem *QAbstractFormBuilder::createDom(QLayoutItem *item, DomLayout *ui_layout, DomWidget *ui_parentWidget)
{
    auto *ui_item = new DomLayoutItem();
 
    if (item->widget())  {
        ui_item->setElementWidget(createDom(item->widget(), ui_parentWidget));
        d->m_laidout.insert(item->widget(), true);
    } else if (item->layout()) {
        ui_item->setElementLayout(createDom(item->layout(), ui_layout, ui_parentWidget));
    } else if (item->spacerItem()) {
        ui_item->setElementSpacer(createDom(item->spacerItem(), ui_layout, ui_parentWidget));
    }
 
    return ui_item;
}
 
/*!
    \internal
*/
DomSpacer *QAbstractFormBuilder::createDom(QSpacerItem *spacer, DomLayout *ui_layout, DomWidget *ui_parentWidget)
{
    Q_UNUSED(ui_layout);
    Q_UNUSED(ui_parentWidget);
 
    auto *ui_spacer = new DomSpacer();
    QList<DomProperty*> properties;
 
    DomProperty *prop = nullptr;
    // sizeHint property
    prop = new DomProperty();
    prop->setAttributeName("sizeHint"_L1);
    prop->setElementSize(new DomSize());
    prop->elementSize()->setElementWidth(spacer->sizeHint().width());
    prop->elementSize()->setElementHeight(spacer->sizeHint().height());
    properties.append(prop);
 
    // orientation property
    prop = new DomProperty(); // ### we don't implemented the case where expandingDirections() is both Vertical and Horizontal
    prop->setAttributeName("orientation"_L1);
    QString value = d->m_fullyQualifiedEnums ? "Qt::Orientation::"_L1 : "Qt::"_L1;
    value += spacer->expandingDirections().testFlag(Qt::Horizontal)
             ? "Horizontal"_L1 : "Vertical"_L1;
    prop->setElementEnum(value);
    properties.append(prop);
 
    ui_spacer->setElementProperty(properties);
    return ui_spacer;
}
 
/*!
    \internal
*/
DomProperty *QAbstractFormBuilder::createProperty(QObject *obj, const QString &pname, const QVariant &v)
{
    if (!checkProperty(obj, pname)) {
        return nullptr;
    }
    return variantToDomProperty(this, obj->metaObject(), pname, v);
}
 
/*!
    \internal
*/
QList<DomProperty*> QAbstractFormBuilder::computeProperties(QObject *obj)
{
    QList<DomProperty*> lst;
 
    const QMetaObject *meta = obj->metaObject();
 
    QHash<QByteArray, bool> properties;
    const int propertyCount = meta->propertyCount();
    for(int i=0; i < propertyCount; ++i)
        properties.insert(meta->property(i).name(), true);
 
    const auto propertyNames = properties.keys();
 
    const int propertyNamesCount = propertyNames.size();
    for(int i=0; i<propertyNamesCount ; ++i) {
        const QString pname = QString::fromUtf8(propertyNames.at(i));
        const QMetaProperty prop = meta->property(meta->indexOfProperty(pname.toUtf8()));
 
        if (!prop.isWritable() || !checkProperty(obj, QLatin1StringView(prop.name())))
            continue;
 
        const QVariant v = prop.read(obj);
 
        DomProperty *dom_prop = nullptr;
        if (v.metaType().id() == QMetaType::Int) {
            dom_prop = new DomProperty();
 
            if (prop.isFlagType())
                uiLibWarning(QCoreApplication::translate("QAbstractFormBuilder", "Flags property are not supported yet."));
 
            if (prop.isEnumType()) {
                QString scope = QString::fromUtf8(prop.enumerator().scope());
                if (scope.size())
                    scope += "::"_L1;
                const QString e = QString::fromUtf8(prop.enumerator().valueToKey(v.toInt()));
                if (e.size())
                    dom_prop->setElementEnum(scope + e);
            } else
                dom_prop->setElementNumber(v.toInt());
            dom_prop->setAttributeName(pname);
        } else {
            dom_prop = createProperty(obj, pname, v);
        }
 
        if (!dom_prop || dom_prop->kind() == DomProperty::Unknown)
            delete dom_prop;
        else
            lst.append(dom_prop);
    }
 
    return lst;
}
 
 
/*!
   \internal
   \typedef QAbstractFormBuilder::DomPropertyHash
   \typedef QAbstractFormBuilder::IconPaths
*/
 
 
/*!
    \internal
*/
QAbstractFormBuilder::DomPropertyHash QAbstractFormBuilder::propertyMap(const QList<DomProperty*> &properties)
{
    DomPropertyHash map;
 
    for (DomProperty *p : properties)
        map.insert(p->attributeName(), p);
 
    return map;
}
 
/*!
    \internal
*/
bool QAbstractFormBuilder::checkProperty(QObject *obj, const QString &prop) const
{
    Q_UNUSED(obj);
    Q_UNUSED(prop);
 
    return true;
}
 
/*!
    \internal
*/
QString QAbstractFormBuilder::toString(const DomString *str)
{
    return str ? str->text() : QString();
}
 
/*!
    \internal
*/
void QAbstractFormBuilder::applyTabStops(QWidget *widget, DomTabStops *tabStops)
{
    if (!tabStops)
        return;
 
    const QStringList &names = tabStops->elementTabStop();
    QWidgetList widgets;
    widgets.reserve(names.size());
    for (const QString &name : names) {
        if (auto *child = widget->findChild<QWidget*>(name)) {
            widgets.append(child);
        } else {
            uiLibWarning(QCoreApplication::translate("QAbstractFormBuilder",
                                                     "While applying tab stops: The widget '%1' could not be found.")
                                                     .arg(name));
        }
    }
 
    for (int i = 1, count = widgets.size(); i < count; ++i)
        QWidget::setTabOrder(widgets.at(i - 1), widgets.at(i));
}
 
/*!
    \internal
*/
DomCustomWidgets *QAbstractFormBuilder::saveCustomWidgets()
{
    return nullptr;
}
 
/*!
    \internal
*/
DomTabStops *QAbstractFormBuilder::saveTabStops()
{
    return nullptr;
}
 
/*!
    \internal
*/
DomResources *QAbstractFormBuilder::saveResources()
{
    return nullptr;
}
 
/*!
    \internal
    \since 4.5
*/
 
DomButtonGroups *QAbstractFormBuilder::saveButtonGroups(const QWidget *mainContainer)
{
    // Save fst order buttongroup children of maincontainer
    const QObjectList &mchildren = mainContainer->children();
    if (mchildren.isEmpty())
        return nullptr;
    QList<DomButtonGroup *> domGroups;
    for (QObject *o : mchildren) {
        if (auto *bg = qobject_cast<QButtonGroup *>(o))
            if (DomButtonGroup* dg = createDom(bg))
                domGroups.push_back(dg);
    }
    if (domGroups.isEmpty())
        return nullptr;
    auto *rc = new DomButtonGroups;
    rc->setElementButtonGroup(domGroups);
    return rc;
}
 
// VC6 would not find templated members, so we use statics and this utter hack.
class FriendlyFB : public QAbstractFormBuilder {
public:
    using QAbstractFormBuilder::saveResource;
    using QAbstractFormBuilder::saveText;
    using QAbstractFormBuilder::resourceBuilder;
    using QAbstractFormBuilder::textBuilder;
    using QAbstractFormBuilder::toVariant;
};
 
template<class T>
static void storeItemFlags(const T *item, QList<DomProperty*> *properties)
{
    static const Qt::ItemFlags defaultFlags = T().flags();
    static const QMetaEnum itemFlags_enum = metaEnum<QAbstractFormBuilderGadget>("itemFlags");
 
    if (item->flags() != defaultFlags) {
        auto *p = new DomProperty;
        p->setAttributeName(QFormBuilderStrings::flagsAttribute);
        p->setElementSet(QString::fromLatin1(itemFlags_enum.valueToKeys(item->flags())));
        properties->append(p);
    }
}
 
template<class T>
static void storeItemProps(QAbstractFormBuilder *abstractFormBuilder, const T *item,
        QList<DomProperty*> *properties,
        Qt::Alignment defaultAlign = Qt::AlignLeading | Qt::AlignVCenter)
{
    static const QFormBuilderStrings &strings = QFormBuilderStrings::instance();
    auto * const formBuilder = static_cast<FriendlyFB *>(abstractFormBuilder);
 
    for (const QFormBuilderStrings::TextRoleNName &it : strings.itemTextRoles) {
        if (DomProperty *p = formBuilder->saveText(it.second, item->data(it.first.second)))
            properties->append(p);
    }
 
    const auto *mo = &QAbstractFormBuilderGadget::staticMetaObject;
    for (const QFormBuilderStrings::RoleNName &it : strings.itemRoles) {
        const QVariant v = item->data(it.first);
        const bool isModified = v.isValid()
            && (it.first != Qt::TextAlignmentRole || v.toUInt() != uint(defaultAlign));
        if (isModified) {
            if (DomProperty *p = variantToDomProperty(abstractFormBuilder, mo, it.second, v))
                properties->append(p);
        }
    }
 
    if (DomProperty *p = formBuilder->saveResource(item->data(Qt::DecorationPropertyRole)))
        properties->append(p);
}
 
template<class T>
static void storeItemPropsNFlags(QAbstractFormBuilder *abstractFormBuilder, const T *item,
        QList<DomProperty*> *properties)
{
    storeItemProps<T>(abstractFormBuilder, item, properties);
    storeItemFlags<T>(item, properties);
}
 
template<class T>
static void loadItemProps(QAbstractFormBuilder *abstractFormBuilder, T *item,
        const QHash<QString, DomProperty*> &properties)
{
    static const QFormBuilderStrings &strings = QFormBuilderStrings::instance();
    auto *const formBuilder = static_cast<FriendlyFB *>(abstractFormBuilder);
 
    for (const QFormBuilderStrings::TextRoleNName &it : strings.itemTextRoles)
        if (DomProperty *p = properties.value(it.second)) {
            const QVariant v = formBuilder->textBuilder()->loadText(p);
            QVariant nativeValue = formBuilder->textBuilder()->toNativeValue(v);
            item->setData(it.first.first, qvariant_cast<QString>(nativeValue));
            item->setData(it.first.second, v);
        }
 
    for (const QFormBuilderStrings::RoleNName &it : strings.itemRoles) {
        if (DomProperty *p = properties.value(it.second)) {
            if (const QVariant v = formBuilder->toVariant(&QAbstractFormBuilderGadget::staticMetaObject, p); v.isValid())
                item->setData(it.first, v);
        }
    }
 
    if (DomProperty *p = properties.value(strings.iconAttribute)) {
        const QVariant v = formBuilder->resourceBuilder()->loadResource(formBuilder->workingDirectory(), p);
        QVariant nativeValue = formBuilder->resourceBuilder()->toNativeValue(v);
        item->setIcon(qvariant_cast<QIcon>(nativeValue));
        item->setData(Qt::DecorationPropertyRole, v);
    }
}
 
template<class T>
static void loadItemPropsNFlags(QAbstractFormBuilder *abstractFormBuilder, T *item,
        const QHash<QString, DomProperty*> &properties)
{
    static const QMetaEnum itemFlags_enum = metaEnum<QAbstractFormBuilderGadget>("itemFlags");
 
    loadItemProps<T>(abstractFormBuilder, item, properties);
 
    DomProperty *p = properties.value(QFormBuilderStrings::flagsAttribute);
    if (p != nullptr && p->kind() == DomProperty::Set)
        item->setFlags(enumKeysToValue<Qt::ItemFlags>(itemFlags_enum, p->elementSet().toLatin1()));
}
 
/*!
    \internal
*/
void QAbstractFormBuilder::saveTreeWidgetExtraInfo(QTreeWidget *treeWidget, DomWidget *ui_widget, DomWidget *ui_parentWidget)
{
    Q_UNUSED(ui_parentWidget);
 
    QList<DomColumn *> columns;
 
    const QFormBuilderStrings &strings = QFormBuilderStrings::instance();
    // save the header
    for (int c = 0; c<treeWidget->columnCount(); ++c) {
        auto *column = new DomColumn;
 
        QList<DomProperty*> properties;
 
        for (const QFormBuilderStrings::TextRoleNName &it : strings.itemTextRoles) {
            DomProperty *p = saveText(it.second, treeWidget->headerItem()->data(c, it.first.second));
            // Prevent uic 4.4.X from crashing if it cannot find a column text
            if (!p && it.first.first == Qt::EditRole && it.second == "text"_L1) {
                auto *defaultHeader = new DomString;
                defaultHeader->setText(QString::number(c + 1));
                defaultHeader->setAttributeNotr(u"true"_s);
                p = new DomProperty;
                p->setAttributeName(it.second);
                p->setElementString(defaultHeader);
            }
            if (p)
                properties.append(p);
        }
 
        for (const QFormBuilderStrings::RoleNName &it : strings.itemRoles) {
            if (const QVariant v = treeWidget->headerItem()->data(c, it.first); v.isValid()) {
                if (DomProperty *p = variantToDomProperty(this, &QAbstractFormBuilderGadget::staticMetaObject, it.second, v))
                    properties.append(p);
            }
        }
 
        if (DomProperty *p = saveResource(treeWidget->headerItem()->data(c, Qt::DecorationPropertyRole)))
            properties.append(p);
 
        column->setElementProperty(properties);
        columns.append(column);
    }
 
    ui_widget->setElementColumn(columns);
 
    auto items = ui_widget->elementItem();
 
    QQueue<std::pair<QTreeWidgetItem *, DomItem *> > pendingQueue;
    for (int i = 0; i < treeWidget->topLevelItemCount(); i++)
        pendingQueue.enqueue(std::make_pair(treeWidget->topLevelItem(i), nullptr));
 
    while (!pendingQueue.isEmpty()) {
        const std::pair<QTreeWidgetItem *, DomItem *> pair = pendingQueue.dequeue();
        QTreeWidgetItem *item = pair.first;
        DomItem *parentDomItem = pair.second;
 
        auto *currentDomItem = new DomItem;
 
        QList<DomProperty*> properties;
        for (int c = 0; c < treeWidget->columnCount(); c++) {
            for (const QFormBuilderStrings::TextRoleNName &it : strings.itemTextRoles) {
                if (DomProperty *p = saveText(it.second, item->data(c, it.first.second)))
                    properties.append(p);
            }
 
            for (const QFormBuilderStrings::RoleNName &it : strings.itemRoles) {
                if (const QVariant v = item->data(c, it.first); v.isValid()) {
                    if (DomProperty *p = variantToDomProperty(this, &QAbstractFormBuilderGadget::staticMetaObject, it.second, v))
                        properties.append(p);
                }
            }
 
            if (DomProperty *p = saveResource(item->data(c, Qt::DecorationPropertyRole)))
                properties.append(p);
        }
        storeItemFlags(item, &properties);
        currentDomItem->setElementProperty(properties);
 
        if (parentDomItem) {
            auto childrenItems = parentDomItem->elementItem();
            childrenItems.append(currentDomItem);
            parentDomItem->setElementItem(childrenItems);
        } else
            items.append(currentDomItem);
 
        for (int i = 0; i < item->childCount(); i++)
            pendingQueue.enqueue(std::make_pair(item->child(i), currentDomItem));
    }
 
    ui_widget->setElementItem(items);
}
 
/*!
    \internal
*/
void QAbstractFormBuilder::saveTableWidgetExtraInfo(QTableWidget *tableWidget, DomWidget *ui_widget, DomWidget *ui_parentWidget)
{
    Q_UNUSED(ui_parentWidget);
 
    // save the horizontal header
    QList<DomColumn *> columns;
    auto *header = tableWidget->horizontalHeader();
    for (int c = 0; c < tableWidget->columnCount(); c++) {
        QList<DomProperty*> properties;
        QTableWidgetItem *item = tableWidget->horizontalHeaderItem(c);
        if (item)
            storeItemProps(this, item, &properties, header->defaultAlignment());
 
        auto *column = new DomColumn;
        column->setElementProperty(properties);
        columns.append(column);
    }
    ui_widget->setElementColumn(columns);
 
    // save the vertical header
    QList<DomRow *> rows;
    header = tableWidget->verticalHeader();
    for (int r = 0; r < tableWidget->rowCount(); r++) {
        QList<DomProperty*> properties;
        QTableWidgetItem *item = tableWidget->verticalHeaderItem(r);
        if (item)
            storeItemProps(this, item, &properties, header->defaultAlignment());
 
        auto *row = new DomRow;
        row->setElementProperty(properties);
        rows.append(row);
    }
    ui_widget->setElementRow(rows);
 
    auto items = ui_widget->elementItem();
    for (int r = 0; r < tableWidget->rowCount(); r++)
        for (int c = 0; c < tableWidget->columnCount(); c++) {
            QTableWidgetItem *item = tableWidget->item(r, c);
            if (item) {
                QList<DomProperty*> properties;
                storeItemPropsNFlags(this, item, &properties);
 
                auto *domItem = new DomItem;
                domItem->setAttributeRow(r);
                domItem->setAttributeColumn(c);
                domItem->setElementProperty(properties);
                items.append(domItem);
            }
        }
 
    ui_widget->setElementItem(items);
}
 
/*!
    \internal
*/
void QAbstractFormBuilder::saveListWidgetExtraInfo(QListWidget *listWidget, DomWidget *ui_widget, DomWidget *ui_parentWidget)
{
    Q_UNUSED(ui_parentWidget);
 
    auto ui_items = ui_widget->elementItem();
    for (int i=0; i<listWidget->count(); ++i) {
        QList<DomProperty*> properties;
        storeItemPropsNFlags(this, listWidget->item(i), &properties);
 
        auto *ui_item = new DomItem();
        ui_item->setElementProperty(properties);
        ui_items.append(ui_item);
    }
 
    ui_widget->setElementItem(ui_items);
}
 
/*!
    \internal
*/
void QAbstractFormBuilder::saveComboBoxExtraInfo(QComboBox *comboBox, DomWidget *ui_widget, DomWidget *ui_parentWidget)
{
    Q_UNUSED(ui_parentWidget);
    auto ui_items = ui_widget->elementItem();
 
    const int count = comboBox->count();
    for (int i=0; i < count; ++i) {
        // We might encounter items for which both builders return 0 in Designer
        // (indicating a custom combo adding items in the constructor). Ignore those.
        DomProperty *textProperty = saveText(QFormBuilderStrings::textAttribute,
                                             comboBox->itemData(i, Qt::DisplayPropertyRole));
        DomProperty *iconProperty = saveResource(comboBox->itemData(i, Qt::DecorationPropertyRole));
        if (textProperty || iconProperty) {
            QList<DomProperty*> properties;
            if (textProperty)
                properties.push_back(textProperty);
            if (iconProperty)
                properties.push_back(iconProperty);
 
            auto *ui_item = new DomItem();
            ui_item->setElementProperty(properties);
            ui_items.push_back(ui_item);
        }
    }
 
    ui_widget->setElementItem(ui_items);
}
 
/*!
    \internal
    \since 4.5
*/
 
void QAbstractFormBuilder::saveButtonExtraInfo(const QAbstractButton *widget, DomWidget *ui_widget, DomWidget *)
{
    using DomPropertyList = QList<DomProperty *>;
    if (const QButtonGroup *buttonGroup = widget->group()) {
        DomPropertyList attributes = ui_widget->elementAttribute();
        auto *domString = new DomString();
        domString->setText(buttonGroup->objectName());
        domString->setAttributeNotr(u"true"_s);
        auto *domProperty = new DomProperty();
        domProperty->setAttributeName(buttonGroupPropertyC);
        domProperty->setElementString(domString);
        attributes += domProperty;
        ui_widget->setElementAttribute(attributes);
    }
}
 
static const QLatin1StringView tableHeaderPrefixes[] = {
    "horizontalHeader"_L1,
    "verticalHeader"_L1,
};
 
static constexpr QLatin1StringView itemViewHeaderRealPropertyNames[] =
{
    // Special handling for qtableview/qtreeview fake header attributes
    "visible"_L1,
    "cascadingSectionResizes"_L1,
    "minimumSectionSize"_L1,    // before defaultSectionSize
    "defaultSectionSize"_L1,
    "highlightSections"_L1,
    "showSortIndicator"_L1,
    "stretchLastSection"_L1
};
 
/*!
    \internal
    \since 4.5
*/
void QAbstractFormBuilder::saveItemViewExtraInfo(const QAbstractItemView *itemView,
                                                 DomWidget *ui_widget, DomWidget *)
{
    if (const auto *treeView = qobject_cast<const QTreeView*>(itemView)) {
        auto viewProperties = ui_widget->elementAttribute();
        const auto &headerProperties = computeProperties(treeView->header());
        for (const QLatin1StringView realPropertyName : itemViewHeaderRealPropertyNames) {
            const QString upperPropertyName = QChar(realPropertyName.at(0)).toUpper()
                                              + realPropertyName.mid(1);
            const QString fakePropertyName = "header"_L1 + upperPropertyName;
            for (DomProperty *property : headerProperties) {
                if (property->attributeName() == realPropertyName) {
                    property->setAttributeName(fakePropertyName);
                    viewProperties << property;
                }
            }
        }
        ui_widget->setElementAttribute(viewProperties);
    } else if (const auto *tableView = qobject_cast<const QTableView*>(itemView)) {
        auto viewProperties = ui_widget->elementAttribute();
        for (QLatin1StringView headerPrefix : tableHeaderPrefixes) {
            const auto &headerProperties = headerPrefix == "horizontalHeader"_L1
                ? computeProperties(tableView->horizontalHeader())
                : computeProperties(tableView->verticalHeader());
            for (const QLatin1StringView realPropertyName : itemViewHeaderRealPropertyNames) {
                const QString upperPropertyName = QChar(realPropertyName.at(0)).toUpper()
                                                  + realPropertyName.mid(1);
                const QString fakePropertyName = headerPrefix + upperPropertyName;
                for (DomProperty *property : std::as_const(headerProperties)) {
                    if (property->attributeName() == realPropertyName) {
                        property->setAttributeName(fakePropertyName);
                        viewProperties << property;
                    }
                }
            }
        }
        ui_widget->setElementAttribute(viewProperties);
    }
}
 
/*!
    \internal
    \since 4.4
*/
 
void QAbstractFormBuilder::setResourceBuilder(QResourceBuilder *builder)
{
    d->setResourceBuilder(builder);
}
 
/*!
    \internal
    \since 4.4
*/
 
QResourceBuilder *QAbstractFormBuilder::resourceBuilder() const
{
    return d->resourceBuilder();
}
 
/*!
    \internal
    \since 4.5
*/
 
void QAbstractFormBuilder::setTextBuilder(QTextBuilder *builder)
{
    d->setTextBuilder(builder);
}
 
/*!
    \internal
    \since 4.5
*/
 
QTextBuilder *QAbstractFormBuilder::textBuilder() const
{
    return d->textBuilder();
}
 
/*!
    \internal
*/
void QAbstractFormBuilder::saveExtraInfo(QWidget *widget, DomWidget *ui_widget,
                                         DomWidget *ui_parentWidget)
{
    if (false) {
#if QT_CONFIG(listwidget)
    } else if (auto *listWidget = qobject_cast<QListWidget*>(widget)) {
        saveListWidgetExtraInfo(listWidget, ui_widget, ui_parentWidget);
#endif
#if QT_CONFIG(treewidget)
    } else if (auto *treeWidget = qobject_cast<QTreeWidget*>(widget)) {
        saveTreeWidgetExtraInfo(treeWidget, ui_widget, ui_parentWidget);
#endif
#if QT_CONFIG(tablewidget)
    } else if (auto *tableWidget = qobject_cast<QTableWidget*>(widget)) {
        saveTableWidgetExtraInfo(tableWidget, ui_widget, ui_parentWidget);
#endif
#if QT_CONFIG(combobox)
    } else if (auto *comboBox = qobject_cast<QComboBox*>(widget)) {
        if (!QFormBuilderExtra::isQFontComboBox(widget))
            saveComboBoxExtraInfo(comboBox, ui_widget, ui_parentWidget);
#endif
    } else if (auto *ab = qobject_cast<QAbstractButton *>(widget)) {
        saveButtonExtraInfo(ab, ui_widget, ui_parentWidget);
    }
    if (auto *itemView = qobject_cast<QAbstractItemView *>(widget)) {
        saveItemViewExtraInfo(itemView, ui_widget, ui_parentWidget);
    }
}
 
/*!
    \internal
*/
void QAbstractFormBuilder::loadListWidgetExtraInfo(DomWidget *ui_widget, QListWidget *listWidget, QWidget *parentWidget)
{
    Q_UNUSED(parentWidget);
    const auto &elementItem = ui_widget->elementItem();
    for (DomItem *ui_item : elementItem) {
        const DomPropertyHash properties = propertyMap(ui_item->elementProperty());
        auto *item = new QListWidgetItem(listWidget);
        loadItemPropsNFlags<QListWidgetItem>(this, item, properties);
    }
 
    if (auto *currentRow = QFBE::propertyByName(ui_widget->elementProperty(), "currentRow"))
        listWidget->setCurrentRow(currentRow->elementNumber());
}
 
/*!
    \internal
*/
void QAbstractFormBuilder::loadTreeWidgetExtraInfo(DomWidget *ui_widget, QTreeWidget *treeWidget, QWidget *parentWidget)
{
    Q_UNUSED(parentWidget);
    const QFormBuilderStrings &strings = QFormBuilderStrings::instance();
    const QMetaEnum itemFlags_enum = metaEnum<QAbstractFormBuilderGadget>("itemFlags");
    const auto &columns = ui_widget->elementColumn();
    if (!columns.isEmpty())
        treeWidget->setColumnCount(columns.size());
 
    for (qsizetype i = 0, size = columns.size(); i < size; ++i) {
        const DomColumn *c = columns.at(i);
        const DomPropertyHash properties = propertyMap(c->elementProperty());
 
        for (const QFormBuilderStrings::RoleNName &it : strings.itemRoles) {
            if (DomProperty *p = properties.value(it.second)) {
                if (const QVariant v = toVariant(&QAbstractFormBuilderGadget::staticMetaObject, p); v.isValid())
                    treeWidget->headerItem()->setData(i, it.first, v);
            }
        }
 
        for (const QFormBuilderStrings::TextRoleNName &it : strings.itemTextRoles) {
            if (DomProperty *p = properties.value(it.second)) {
                const QVariant v = textBuilder()->loadText(p);
                QVariant nativeValue = textBuilder()->toNativeValue(v);
                treeWidget->headerItem()->setData(i, it.first.first, qvariant_cast<QString>(nativeValue));
                treeWidget->headerItem()->setData(i, it.first.second, v);
            }
        }
 
        if (DomProperty *p = properties.value(QFormBuilderStrings::iconAttribute)) {
            const QVariant v = resourceBuilder()->loadResource(workingDirectory(), p);
            QVariant nativeValue = resourceBuilder()->toNativeValue(v);
            treeWidget->headerItem()->setIcon(i, qvariant_cast<QIcon>(nativeValue));
            treeWidget->headerItem()->setData(i, Qt::DecorationPropertyRole, v);
        }
    }
 
    QQueue<std::pair<DomItem *, QTreeWidgetItem *> > pendingQueue;
    const auto &widgetElementItem = ui_widget->elementItem();
    for (DomItem *ui_item : widgetElementItem)
        pendingQueue.enqueue(std::make_pair(ui_item, nullptr));
 
    while (!pendingQueue.isEmpty()) {
        const std::pair<DomItem *, QTreeWidgetItem *> pair = pendingQueue.dequeue();
        const DomItem *domItem = pair.first;
        QTreeWidgetItem *parentItem = pair.second;
 
        QTreeWidgetItem *currentItem = nullptr;
 
        if (parentItem)
            currentItem = new QTreeWidgetItem(parentItem);
        else
            currentItem = new QTreeWidgetItem(treeWidget);
 
        const auto &properties = domItem->elementProperty();
        int col = -1;
        for (DomProperty *property : properties) {
            if (property->attributeName() == QFormBuilderStrings::flagsAttribute
                && !property->elementSet().isEmpty()) {
                currentItem->setFlags(enumKeysToValue<Qt::ItemFlags>(itemFlags_enum, property->elementSet().toLatin1()));
            } else if (property->attributeName() == QFormBuilderStrings::textAttribute
                       && property->elementString()) {
                col++;
                QVariant textV = textBuilder()->loadText(property);
                QVariant nativeValue = textBuilder()->toNativeValue(textV);
                currentItem->setText(col, qvariant_cast<QString>(nativeValue));
                currentItem->setData(col, Qt::DisplayPropertyRole, textV);
            } else if (col >= 0) {
                if (property->attributeName() == QFormBuilderStrings::iconAttribute) {
                    QVariant v = resourceBuilder()->loadResource(workingDirectory(), property);
                    if (v.isValid()) {
                        QVariant nativeValue = resourceBuilder()->toNativeValue(v);
                        currentItem->setIcon(col, qvariant_cast<QIcon>(nativeValue));
                        currentItem->setData(col, Qt::DecorationPropertyRole, v);
                    }
                } else {
                    int role = strings.treeItemRoleHash.value(property->attributeName(), (Qt::ItemDataRole)-1);
                    if (role >= 0) {
                        if (const QVariant v = toVariant(&QAbstractFormBuilderGadget::staticMetaObject, property); v.isValid())
                            currentItem->setData(col, role, v);
                    } else {
                        std::pair<Qt::ItemDataRole, Qt::ItemDataRole> rolePair =
                            strings.treeItemTextRoleHash.value(property->attributeName(),
                                         std::make_pair((Qt::ItemDataRole)-1, (Qt::ItemDataRole)-1));
                        if (rolePair.first >= 0) {
                            QVariant textV = textBuilder()->loadText(property);
                            QVariant nativeValue = textBuilder()->toNativeValue(textV);
                            currentItem->setData(col, rolePair.first, qvariant_cast<QString>(nativeValue));
                            currentItem->setData(col, rolePair.second, textV);
                        }
                    }
                }
            }
        }
 
        const auto &elementItem = domItem->elementItem();
        for (DomItem *childItem : elementItem)
            pendingQueue.enqueue(std::make_pair(childItem, currentItem));
 
    }
}
 
/*!
    \internal
*/
void QAbstractFormBuilder::loadTableWidgetExtraInfo(DomWidget *ui_widget, QTableWidget *tableWidget, QWidget *parentWidget)
{
    Q_UNUSED(parentWidget);
 
    const auto &columns = ui_widget->elementColumn();
    if (!columns.isEmpty())
        tableWidget->setColumnCount(columns.size());
    for (qsizetype i = 0, size = columns.size(); i < size; ++i) {
        DomColumn *c = columns.at(i);
        const DomPropertyHash properties = propertyMap(c->elementProperty());
 
        if (!properties.isEmpty()) {
            auto *item = new QTableWidgetItem;
            loadItemProps(this, item, properties);
            tableWidget->setHorizontalHeaderItem(i, item);
        }
    }
 
    const auto &rows = ui_widget->elementRow();
    if (!rows.isEmpty())
        tableWidget->setRowCount(rows.size());
    for (qsizetype i = 0, size = rows.size(); i < size; ++i) {
        const DomRow *r = rows.at(i);
        const DomPropertyHash properties = propertyMap(r->elementProperty());
 
        if (!properties.isEmpty()) {
            auto *item = new QTableWidgetItem;
            loadItemProps(this, item, properties);
            tableWidget->setVerticalHeaderItem(i, item);
        }
    }
 
    const auto &elementItem = ui_widget->elementItem();
    for (DomItem *ui_item : elementItem) {
        if (ui_item->hasAttributeRow() && ui_item->hasAttributeColumn()) {
            const DomPropertyHash properties = propertyMap(ui_item->elementProperty());
            auto *item = new QTableWidgetItem;
            loadItemPropsNFlags(this, item, properties);
            tableWidget->setItem(ui_item->attributeRow(), ui_item->attributeColumn(), item);
        }
    }
}
 
/*!
    \internal
*/
void QAbstractFormBuilder::loadComboBoxExtraInfo(DomWidget *ui_widget, QComboBox *comboBox, QWidget *parentWidget)
{
    Q_UNUSED(parentWidget);
    const auto &elementItem = ui_widget->elementItem();
    for (DomItem *ui_item : elementItem) {
        const auto &properties = ui_item->elementProperty();
        QString text;
        QIcon icon;
        QVariant textData;
        QVariant iconData;
 
        DomProperty *p = QFBE::propertyByName(properties, QFormBuilderStrings::textAttribute);
        if (p && p->elementString()) {
             textData = textBuilder()->loadText(p);
             text = qvariant_cast<QString>(textBuilder()->toNativeValue(textData));
        }
 
        p = QFBE::propertyByName(properties, QFormBuilderStrings::iconAttribute);
        if (p) {
             iconData = resourceBuilder()->loadResource(workingDirectory(), p);
             icon = qvariant_cast<QIcon>(resourceBuilder()->toNativeValue(iconData));
        }
 
        comboBox->addItem(icon, text);
        comboBox->setItemData((comboBox->count()-1), iconData, Qt::DecorationPropertyRole);
        comboBox->setItemData((comboBox->count()-1), textData, Qt::DisplayPropertyRole);
    }
 
    if (auto *currentIndex = currentIndexProperty(ui_widget->elementProperty()))
        comboBox->setCurrentIndex(currentIndex->elementNumber());
}
 
// Get the button group name out of a widget's attribute list
static QString buttonGroupName(const DomWidget *ui_widget)
{
    const auto &attributes = ui_widget->elementAttribute();
    if (attributes.isEmpty())
        return {};
    const QString buttonGroupProperty = buttonGroupPropertyC;
    for (const DomProperty *p : attributes) {
        if (p->attributeName() == buttonGroupProperty)
            return p->elementString()->text();
    }
    return QString();
}
 
/*!
    \internal
    \since 4.5
*/
 
void QAbstractFormBuilder::loadButtonExtraInfo(const DomWidget *ui_widget, QAbstractButton *button, QWidget *)
{
    using ButtonGroupHash = QFormBuilderExtra::ButtonGroupHash;
 
    const QString groupName = buttonGroupName(ui_widget);
    if (groupName.isEmpty())
        return;
    // Find entry
    ButtonGroupHash &buttonGroups = d->buttonGroups();
    const auto it = buttonGroups.find(groupName);
    if (it == buttonGroups.end()) {
#ifdef QFORMINTERNAL_NAMESPACE // Suppress the warning when copying in Designer
        uiLibWarning(QCoreApplication::translate("QAbstractFormBuilder", "Invalid QButtonGroup reference '%1' referenced by '%2'.").arg(groupName, button->objectName()));
#endif
        return;
    }
    // Create button group on demand?
    QButtonGroup *&group = it.value().second;
    if (group == nullptr) {
        group = new QButtonGroup;
        group->setObjectName(groupName);
        applyProperties(group,  it.value().first->elementProperty());
    }
    group->addButton(button);
}
 
/*!
    \internal
    \since 4.5
*/
void QAbstractFormBuilder::loadItemViewExtraInfo(DomWidget *ui_widget, QAbstractItemView *itemView,
                                                 QWidget *)
{
    if (auto *treeView = qobject_cast<QTreeView*>(itemView)) {
        const auto &allAttributes = ui_widget->elementAttribute();
        QList<DomProperty *> headerProperties;
        for (QLatin1StringView realPropertyName : itemViewHeaderRealPropertyNames) {
            const QString upperPropertyName = QChar(realPropertyName.at(0)).toUpper()
                                              + realPropertyName.mid(1);
            const QString fakePropertyName = "header"_L1 + upperPropertyName;
            for (DomProperty *attr : allAttributes) {
                if (attr->attributeName() == fakePropertyName) {
                    attr->setAttributeName(realPropertyName);
                    headerProperties << attr;
                }
            }
        }
        applyProperties(treeView->header(), headerProperties);
    } else if (auto *tableView = qobject_cast<QTableView*>(itemView)) {
        const auto &allAttributes = ui_widget->elementAttribute();
        for (QLatin1StringView headerPrefix : tableHeaderPrefixes) {
            QList<DomProperty*> headerProperties;
            for (QLatin1StringView realPropertyName : itemViewHeaderRealPropertyNames) {
                const QString upperPropertyName = QChar(realPropertyName.at(0)).toUpper()
                                                  + realPropertyName.mid(1);
                const QString fakePropertyName = headerPrefix + upperPropertyName;
                for (DomProperty *attr : allAttributes) {
                    if (attr->attributeName() == fakePropertyName) {
                        attr->setAttributeName(realPropertyName);
                        headerProperties << attr;
                    }
                }
            }
            if (headerPrefix == "horizontalHeader"_L1)
                applyProperties(tableView->horizontalHeader(), headerProperties);
            else
                applyProperties(tableView->verticalHeader(), headerProperties);
        }
    }
}
 
/*!
    \internal
*/
void QAbstractFormBuilder::loadExtraInfo(DomWidget *ui_widget, QWidget *widget, QWidget *parentWidget)
{
    if (false) {
#if QT_CONFIG(listwidget)
    } else if (auto *listWidget = qobject_cast<QListWidget*>(widget)) {
        loadListWidgetExtraInfo(ui_widget, listWidget, parentWidget);
#endif
#if QT_CONFIG(treewidget)
    } else if (auto *treeWidget = qobject_cast<QTreeWidget*>(widget)) {
        loadTreeWidgetExtraInfo(ui_widget, treeWidget, parentWidget);
#endif
#if QT_CONFIG(tablewidget)
    } else if (auto *tableWidget = qobject_cast<QTableWidget*>(widget)) {
        loadTableWidgetExtraInfo(ui_widget, tableWidget, parentWidget);
#endif
#if QT_CONFIG(combobox)
    } else if (auto *comboBox = qobject_cast<QComboBox*>(widget)) {
        if (!QFormBuilderExtra::isQFontComboBox(widget))
            loadComboBoxExtraInfo(ui_widget, comboBox, parentWidget);
#endif
#if QT_CONFIG(tabwidget)
    } else if (auto *tabWidget = qobject_cast<QTabWidget*>(widget)) {
        if (auto *currentIndex = currentIndexProperty(ui_widget->elementProperty()))
            tabWidget->setCurrentIndex(currentIndex->elementNumber());
#endif
#if QT_CONFIG(stackedwidget)
    } else if (auto *stackedWidget = qobject_cast<QStackedWidget*>(widget)) {
        if (auto *currentIndex = currentIndexProperty(ui_widget->elementProperty()))
            stackedWidget->setCurrentIndex(currentIndex->elementNumber());
#endif
#if QT_CONFIG(toolbox)
    } else if (auto *toolBox = qobject_cast<QToolBox*>(widget)) {
        if (auto *currentIndex = currentIndexProperty(ui_widget->elementProperty()))
            toolBox->setCurrentIndex(currentIndex->elementNumber());
        if (auto *tabSpacing = QFBE::propertyByName(ui_widget->elementProperty(), "tabSpacing"))
            toolBox->layout()->setSpacing(tabSpacing->elementNumber());
#endif
    } else if (auto *ab = qobject_cast<QAbstractButton *>(widget)) {
        loadButtonExtraInfo(ui_widget, ab, parentWidget);
    }
    if (auto *itemView = qobject_cast<QAbstractItemView *>(widget)) {
        loadItemViewExtraInfo(ui_widget, itemView, parentWidget);
    }
}
 
/*!
    Returns the current working directory of the form builder.
 
    \sa setWorkingDirectory()
*/
QDir QAbstractFormBuilder::workingDirectory() const
{
    return d->m_workingDirectory;
}
 
/*!
    Sets the current working directory of the form builder to the
    specified \a directory.
 
    \sa workingDirectory()
*/
void QAbstractFormBuilder::setWorkingDirectory(const QDir &directory)
{
    d->m_workingDirectory = directory;
}
 
/*!
    \internal
*/
DomAction *QAbstractFormBuilder::createDom(QAction *action)
{
    if (action->parent() == action->menu() || action->isSeparator())
        return nullptr;
 
    auto *ui_action = new DomAction;
    ui_action->setAttributeName(action->objectName());
 
    ui_action->setElementProperty(computeProperties(action));
 
    return ui_action;
}
 
/*!
    \internal
    \since 4.5
*/
 
DomButtonGroup *QAbstractFormBuilder::createDom(QButtonGroup *buttonGroup)
{
    if (buttonGroup->buttons().isEmpty()) // Empty group left over on form?
        return nullptr;
    auto *domButtonGroup = new DomButtonGroup;
    domButtonGroup->setAttributeName(buttonGroup->objectName());
 
    domButtonGroup->setElementProperty(computeProperties(buttonGroup));
    return domButtonGroup;
}
 
/*!
    \internal
*/
DomActionGroup *QAbstractFormBuilder::createDom(QActionGroup *actionGroup)
{
    auto *ui_action_group = new DomActionGroup;
    ui_action_group->setAttributeName(actionGroup->objectName());
 
    ui_action_group->setElementProperty(computeProperties(actionGroup));
 
    QList<DomAction *> ui_actions;
 
    const auto &actions = actionGroup->actions();
    ui_actions.reserve(actions.size());
    for (QAction *action : actions) {
        if (DomAction *ui_action = createDom(action)) {
            ui_actions.append(ui_action);
        }
    }
 
    ui_action_group->setElementAction(ui_actions);
 
    return ui_action_group;
}
 
/*!
    \internal
*/
void QAbstractFormBuilder::addMenuAction(QAction *action)
{
    Q_UNUSED(action);
}
 
/*!
    \internal
*/
void QAbstractFormBuilder::reset()
{
    d->m_laidout.clear();
    d->m_actions.clear();
    d->m_actionGroups.clear();
    d->m_defaultMargin = INT_MIN;
    d->m_defaultSpacing = INT_MIN;
    d->m_fullyQualifiedEnums = true;
}
 
/*!
    \internal
    Access meta enumeration for Qt::ToolBarArea
*/
 
QMetaEnum QAbstractFormBuilder::toolBarAreaMetaEnum()
{
    return metaEnum<QAbstractFormBuilderGadget>("toolBarArea");
}
 
/*!
    \internal
    Set up a DOM property with icon.
*/
 
void QAbstractFormBuilder::setIconProperty(DomProperty &p, const IconPaths &ip) const
{
    auto *dpi = new DomResourceIcon;
 
 /* TODO
    if (!ip.second.isEmpty())
        pix->setAttributeResource(ip.second);
*/
    dpi->setText(ip.first);
 
    p.setAttributeName(QFormBuilderStrings::iconAttribute);
    p.setElementIconSet(dpi);
}
 
/*!
    \internal
    Set up a DOM property with pixmap.
*/
 
void QAbstractFormBuilder::setPixmapProperty(DomProperty &p, const IconPaths &ip) const
{
    QFormBuilderExtra::setPixmapProperty(&p, ip);
}
 
/*!
    \internal
    \since 4.4
*/
 
DomProperty *QAbstractFormBuilder::saveResource(const QVariant &v) const
{
    if (v.isNull())
        return nullptr;
 
    DomProperty *p = resourceBuilder()->saveResource(workingDirectory(), v);
    if (p)
        p->setAttributeName(QFormBuilderStrings::iconAttribute);
    return p;
}
 
/*!
    \internal
    \since 4.5
*/
 
DomProperty *QAbstractFormBuilder::saveText(const QString &attributeName, const QVariant &v) const
{
    if (v.isNull())
        return nullptr;
 
    DomProperty *p = textBuilder()->saveText(v);
    if (p)
        p->setAttributeName(attributeName);
    return p;
}
 
/*!
    \internal
    Return the appropriate DOM pixmap for an image dom property.
    From 4.4 - unused
*/
 
const DomResourcePixmap *QAbstractFormBuilder::domPixmap(const DomProperty* p) {
    switch (p->kind()) {
    case DomProperty::IconSet:
        qDebug() << "** WARNING QAbstractFormBuilder::domPixmap() called for icon set!";
        break;
    case DomProperty::Pixmap:
        return p->elementPixmap();
    default:
        break;
    }
    return nullptr;
}
 
/*!
    \fn void QAbstractFormBuilder::createConnections ( DomConnections *, QWidget * )
    \internal
*/
 
/*!
    \fn void QAbstractFormBuilder::createCustomWidgets ( DomCustomWidgets * )
    \internal
*/
 
/*!
    \fn void QAbstractFormBuilder::createResources ( DomResources * )
    \internal
*/
 
/*!
    Returns a human-readable description of the last error occurred in load().
 
    \since 5.0
    \sa load()
*/
 
QString QAbstractFormBuilder::errorString() const
{
    return d->m_errorString;
}
 
QT_END_NAMESPACE