Qt Designer: Clean up the SDK headers

- Use "= default" for constructors/destructors
- Disable copy/move for non-QObject type interfaces and
  add constructors were needed
- Remove duplicated disable copy for QObject type interfaces
- Fix some formatting
- Remove default implementation of
  QDesignerContainerExtension::canAddWidget()/canRemoveWidget()
- Remove Qt 6 fixme comments

Task-number: QTBUG-79896
Change-Id: If9521910c6488c081817e2ccdbf42de578cb16ad
Reviewed-by: Jarek Kobus <jaroslaw.kobus@qt.io>

1 files changed, 6 insertions, 2 deletions

diff --git a/src/designer/src/lib/sdk/abstractpromotioninterface.h b/src/designer/src/lib/sdk/abstractpromotioninterface.h
index 94c863116..3ec2a3038 100644
--- a/src/designer/src/lib/sdk/abstractpromotioninterface.h
+++ b/src/designer/src/lib/sdk/abstractpromotioninterface.h
@@ -42,9 +42,13 @@ class QDesignerWidgetDataBaseItemInterface;
 class QDESIGNER_SDK_EXPORT QDesignerPromotionInterface
 {
 public:
-    virtual ~QDesignerPromotionInterface();
+    Q_DISABLE_COPY_MOVE(QDesignerPromotionInterface)
 
-    struct PromotedClass {
+    QDesignerPromotionInterface() = default;
+    virtual ~QDesignerPromotionInterface() = default;
+
+    struct PromotedClass
+    {
         QDesignerWidgetDataBaseItemInterface *baseItem;
         QDesignerWidgetDataBaseItemInterface *promotedItem;
     };