abstractformbuilder.cpp

QT 开发环境里面一个很重要的文件

        return true;
    }

    else if (QToolBox *toolBox = qobject_cast<QToolBox*>(parentWidget)) {
        int tabIndex = toolBox->count();
        toolBox->addItem(widget, label);

        if (DomProperty *picon = attributes.value(QLatin1String("icon"))) {
            toolBox->setItemIcon(tabIndex, qvariant_cast<QIcon>(toVariant(0, picon)));
        }

        if (DomProperty *ptoolTip = attributes.value(QLatin1String("toolTip"))) {
            toolBox->setItemToolTip(tabIndex, toString(ptoolTip->elementString()));
        }

        return true;
    }

    else if (QStackedWidget *stackedWidget = qobject_cast<QStackedWidget*>(parentWidget)) {
        stackedWidget->addWidget(widget);
        return true;
    }

    else if (QSplitter *splitter = qobject_cast<QSplitter*>(parentWidget)) {
        splitter->addWidget(widget);
        return true;
    }

    else if (QDockWidget *dockWidget = qobject_cast<QDockWidget*>(parentWidget)) {
        dockWidget->setWidget(widget);
        return true;
    }

    return false;
}

/*!
    \internal
*/
void QAbstractFormBuilder::layoutInfo(DomLayout *ui_layout, QObject *parent, int *margin, int *spacing)
{
    QHash<QString, DomProperty*> properties = propertyMap(ui_layout->elementProperty());

    if (margin)
        *margin = properties.contains(QLatin1String("margin"))
            ? properties.value(QLatin1String("margin"))->elementNumber()
            : m_defaultMargin;

    if (spacing)
        *spacing = properties.contains(QLatin1String("spacing"))
            ? properties.value(QLatin1String("spacing"))->elementNumber()
            : m_defaultSpacing;

    if (margin && m_defaultMargin == INT_MIN) {
        Q_ASSERT(parent);
        if (qstrcmp(parent->metaObject()->className(), "QLayoutWidget") == 0)
            *margin = INT_MIN;
    }
}

/*!
    \internal
*/
QLayout *QAbstractFormBuilder::create(DomLayout *ui_layout, QLayout *parentLayout, QWidget *parentWidget)
{
    QObject *p = parentLayout;

    if (p == 0)
        p = parentWidget;

    Q_ASSERT(p != 0);

    bool tracking = false;

    if (p == parentWidget && parentWidget->layout()) {
        tracking = true;
        p = parentWidget->layout();
    }

    QLayout *layout = createLayout(ui_layout->attributeClass(), p, QString());

    if (layout == 0)
        return 0;

    if (tracking && layout->parent() == 0) {
        QBoxLayout *box = qobject_cast<QBoxLayout*>(parentWidget->layout());
        Q_ASSERT(box != 0); // only QBoxLayout is supported
        box->addLayout(layout);
    }

    int margin = INT_MIN, spacing = INT_MIN;
    layoutInfo(ui_layout, p, &margin, &spacing);

    if (margin != INT_MIN)
       layout->setMargin(margin);

    if (spacing != INT_MIN)
        layout->setSpacing(spacing);

    applyProperties(layout, ui_layout->elementProperty());

    foreach (DomLayoutItem *ui_item, ui_layout->elementItem()) {
        if (QLayoutItem *item = create(ui_item, layout, parentWidget)) {
            addItem(ui_item, item, layout);
        }
    }

    return layout;
}

/*!
    \internal
*/
bool QAbstractFormBuilder::addItem(DomLayoutItem *ui_item, QLayoutItem *item, QLayout *layout)
{
    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 (QGridLayout *grid = qobject_cast<QGridLayout*>(layout)) {
        int rowSpan = ui_item->hasAttributeRowSpan() ? ui_item->attributeRowSpan() : 1;
        int colSpan = ui_item->hasAttributeColSpan() ? ui_item->attributeColSpan() : 1;
        grid->addItem(item, ui_item->attributeRow(), ui_item->attributeColumn(),
                        rowSpan, colSpan, item->alignment());
    } else {
        layout->addItem(item);
    }

    return true;
}

/*!
    \internal
*/
QLayoutItem *QAbstractFormBuilder::create(DomLayoutItem *ui_layoutItem, QLayout *layout, QWidget *parentWidget)
{
    switch (ui_layoutItem->kind()) {
    case DomLayoutItem::Widget:
        return new QWidgetItem(create(ui_layoutItem->elementWidget(), parentWidget));

    case DomLayoutItem::Spacer: {
        QSize size(0, 0);
        QSizePolicy::Policy sizeType = QSizePolicy::Expanding;
        bool isVspacer = false;

        DomSpacer *ui_spacer = ui_layoutItem->elementSpacer();

        int e_index = QAbstractFormBuilderGadget::staticMetaObject.indexOfProperty("sizeType");
        Q_ASSERT(e_index != -1);

        QMetaEnum sizePolicy_enum = QAbstractFormBuilderGadget::staticMetaObject.property(e_index).enumerator();

        e_index = QAbstractFormBuilderGadget::staticMetaObject.indexOfProperty("orientation");
        Q_ASSERT(e_index != -1);

        QMetaEnum orientation_enum = QAbstractFormBuilderGadget::staticMetaObject.property(e_index).enumerator();

        foreach (DomProperty *p, ui_spacer->elementProperty()) {
            QVariant v = toVariant(&QAbstractFormBuilderGadget::staticMetaObject, p); // ### remove me
            if (v.isNull())
                continue;

            if (p->attributeName() == QLatin1String("sizeHint") && p->kind() == DomProperty::Size) {
                size = v.toSize();  // ###  remove me
            } else if (p->attributeName() == QLatin1String("sizeType") && p->kind() == DomProperty::Enum) {
                sizeType = static_cast<QSizePolicy::Policy>(sizePolicy_enum.keyToValue(p->elementEnum().toUtf8()));
            } else if (p->attributeName() == QLatin1String("orientation") && p->kind() == DomProperty::Enum) {
                Qt::Orientation o = static_cast<Qt::Orientation>(orientation_enum.keyToValue(p->elementEnum().toUtf8()));
                isVspacer = (o == Qt::Vertical);
            }
        }

        QSpacerItem *spacer = 0;
        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 0;
}

/*!
    \internal
*/
void QAbstractFormBuilder::applyProperties(QObject *o, const QList<DomProperty*> &properties)
{
    foreach (DomProperty *p, properties) {
        QVariant v = toVariant(o->metaObject(), p);
        if (!v.isNull())
            o->setProperty(p->attributeName().toUtf8(), v);
    }
}

/*!
    \internal
*/
QVariant QAbstractFormBuilder::toVariant(const QMetaObject *meta, DomProperty *p)
{
    QVariant v;

    switch(p->kind()) {
    case DomProperty::Bool: {
        v = toBool(p->elementBool());
    } break;

    case DomProperty::Cstring: {
        v = p->elementCstring();
    } break;

    case DomProperty::Point: {
        DomPoint *point = p->elementPoint();
        QPoint pt(point->elementX(), point->elementY());
        v = QVariant(pt);
    } break;

    case DomProperty::PointF: {
        DomPointF *pointf = p->elementPointF();
        QPointF pt(pointf->elementX(), pointf->elementY());
        v = QVariant(pt);
    } break;

    case DomProperty::Size: {
        DomSize *size = p->elementSize();
        QSize sz(size->elementWidth(), size->elementHeight());
        v = QVariant(sz);
    } break;

    case DomProperty::SizeF: {
        DomSizeF *sizef = p->elementSizeF();
        QSizeF sz(sizef->elementWidth(), sizef->elementHeight());
        v = QVariant(sz);
    } break;

    case DomProperty::Rect: {
        DomRect *rc = p->elementRect();
        QRect g(rc->elementX(), rc->elementY(), rc->elementWidth(), rc->elementHeight());
        v = QVariant(g);
    } break;

    case DomProperty::RectF: {
        DomRectF *rcf = p->elementRectF();
        QRectF g(rcf->elementX(), rcf->elementY(), rcf->elementWidth(), rcf->elementHeight());
        v = QVariant(g);
    } break;

    case DomProperty::String: {
        int index = meta->indexOfProperty(p->attributeName().toUtf8());
        if (index != -1 && meta->property(index).type() == QVariant::KeySequence)
            v = qVariantFromValue(QKeySequence(p->elementString()->text()));
        else
            v = p->elementString()->text();
    } break;

    case DomProperty::Number: {
        v = p->elementNumber();
    } break;

    case DomProperty::LongLong: {
        v = p->elementLongLong();
    } break;

    case DomProperty::Double: {
        v = p->elementDouble();
    } break;

    case DomProperty::Char: {
        DomChar *character = p->elementChar();
        QChar c(character->elementUnicode());
        v = qVariantFromValue(c);
    } break;

    case DomProperty::Color: {
        DomColor *color = p->elementColor();
        QColor c(color->elementRed(), color->elementGreen(), color->elementBlue());
        v = qVariantFromValue(c);
    } break;

    case DomProperty::Font: {
        DomFont *font = p->elementFont();

        QFont f;
        if (font->hasElementFamily() && !font->elementFamily().isEmpty())
            f.setFamily(font->elementFamily());
        if (font->hasElementPointSize() && font->elementPointSize() > 0)
            f.setPointSize(font->elementPointSize());
        if (font->hasElementWeight() && font->elementWeight() > 0)
            f.setWeight(font->elementWeight());
        if (font->hasElementItalic())
            f.setItalic(font->elementItalic());
        if (font->hasElementBold())
            f.setBold(font->elementBold());
        if (font->hasElementUnderline())
            f.setUnderline(font->elementUnderline());
        if (font->hasElementStrikeOut())
            f.setStrikeOut(font->elementStrikeOut());
        if (font->hasElementKerning())
            f.setKerning(font->elementKerning());
        if (font->hasElementAntialiasing()) {
            f.setStyleStrategy(font->elementAntialiasing() ? QFont::PreferDefault : QFont::NoAntialias);
        }
        v = qVariantFromValue(f);
    } break;

    case DomProperty::Date: {
        DomDate *date = p->elementDate();

        QDate d(date->elementYear(), date->elementMonth(), date->elementDay());
        v = QVariant(d);
    } break;

    case DomProperty::Time: {
        DomTime *t = p->elementTime();

        QTime tm(t->elementHour(), t->elementMinute(), t->elementSecond());
        v = QVariant(tm);
    } break;

    case DomProperty::DateTime: {
        DomDateTime *dateTime = p->elementDateTime();
        QDate d(dateTime->elementYear(), dateTime->elementMonth(), dateTime->elementDay());
        QTime tm(dateTime->elementHour(), dateTime->elementMinute(), dateTime->elementSecond());

        QDateTime dt(d, tm);
        v = QVariant(dt);
    } break;

    case DomProperty::Url: {
        DomUrl *url = p->elementUrl();
        QUrl u(url->elementString()->text());
        v = QVariant(u);
    } break;

    case DomProperty::Pixmap:
    case DomProperty::IconSet: {
        DomResourcePixmap *resource = 0;
        if (p->kind() == DomProperty::IconSet)
            resource = p->elementIconSet();
        else
            resource = p->elementPixmap();

        if (resource != 0) {
            QString icon_path = resource->text();
            QString qrc_path = resource->attributeResource();

            if (icon_path.isEmpty()) {
                if (p->kind() == DomProperty::IconSet)
                    return QIcon();

                return QPixmap();
            }

            if (qrc_path.isEmpty())
                icon_path = workingDirectory().absoluteFilePath(icon_path);
            else
                qrc_path = workingDirectory().absoluteFilePath(qrc_path);

            if (p->kind() == DomProperty::IconSet) {
                QIcon icon = nameToIcon(icon_path, qrc_path);

                v = qVariantFromValue(icon);
            } else {
                QPixmap pixmap = nameToPixmap(icon_path, qrc_path);
                v = qVariantFromValue(pixmap);
            }
        }
    } break;

    case DomProperty::Palette: {
        DomPalette *dom = p->elementPalette();
        QPalette palette;

        if (dom->elementActive())
            setupColorGroup(palette, QPalette::Active, dom->elementActive());

        if (dom->elementInactive())
            setupColorGroup(palette, QPalette::Inactive, dom->elementInactive());

        if (dom->elementDisabled())
            setupColorGroup(palette, QPalette::Disabled, dom->elementDisabled());

        palette.setCurrentColorGroup(QPalette::Active);
        v = qVariantFromValue(palette);
    } break;

    case DomProperty::Cursor: {
        v = qVariantFromValue(QCursor(static_cast<Qt::CursorShape>(p->elementCursor())));