QDESIGNER_SHARED_EXPORT QDesignerWidgetDataBaseItemInterface *
appendDerived(QDesignerWidgetDataBaseInterface *db,
const QString &className, const QString &group,
const QString &baseClassName,
const QString &includeFile,
bool promoted, bool custom)
{
if (debugWidgetDataBase)
qDebug() << "appendDerived " << className << " derived from " << baseClassName;
// Check.
if (className.isEmpty() || baseClassName.isEmpty()) {
qWarning("** WARNING %s called with an empty class names: '%s' extends '%s'.",
Q_FUNC_INFO, className.toUtf8().constData(), baseClassName.toUtf8().constData());
return 0;
}
// Check whether item already exists.
QDesignerWidgetDataBaseItemInterface *derivedItem = 0;
const int existingIndex = db->indexOfClassName(className);
if ( existingIndex != -1)
derivedItem = db->item(existingIndex);
if (derivedItem) {
// Check the existing item for base class mismatch. This will likely
// happen when loading a file written by an instance with missing plugins.
// In that case, just warn and ignore the file properties.
//
// An empty base class indicates that it is not known (for example, for custom plugins).
// In this case, the widget DB is later updated once the widget is created
// by DOM (by querying the metaobject). Suppress the warning.
const QString existingBaseClass = derivedItem->extends();
if (existingBaseClass.isEmpty() || baseClassName == existingBaseClass)
return derivedItem;
// Warn about mismatches
designerWarning(QCoreApplication::translate("WidgetDataBase",
"The file contains a custom widget '%1' whose base class (%2)"
" differs from the current entry in the widget database (%3)."
" The widget database is left unchanged.").
arg(className, baseClassName, existingBaseClass));
return derivedItem;
}
// Create this item, inheriting its base properties
const int baseIndex = db->indexOfClassName(baseClassName);
if (baseIndex == -1) {
if (debugWidgetDataBase)
qDebug() << "appendDerived failed due to missing base class";
return 0;
}
const QDesignerWidgetDataBaseItemInterface *baseItem = db->item(baseIndex);
derivedItem = WidgetDataBaseItem::clone(baseItem);
// Sort of hack: If base class is QWidget, we most likely
// do not want to inherit the container attribute.
static const QString qWidgetName = QLatin1String("QWidget");
if (baseItem->name() == qWidgetName)
derivedItem->setContainer(false);
// set new props
derivedItem->setName(className);
derivedItem->setGroup(group);
derivedItem->setCustom(custom);
derivedItem->setPromoted(promoted);
derivedItem->setExtends(baseClassName);
derivedItem->setIncludeFile(includeFile);
db->append(derivedItem);
return derivedItem;
}
