Allow canceling incubation

Qt Quick Controls must avoid destroying any object that belongs to
a tree of objects being incubated. The problem is that QQC have no
control over the incubation process. This patch adds private API
that allows QQC to cancel incubation of a specific item that QQC
would like to destroy.

Change-Id: Id9f9004736e2b53fe46cdb6bb3055b7457def94d
Task-number: QTBUG-50992
Reviewed-by: Simon Hausmann <simon.hausmann@qt.io>

1 files changed, 1 insertions, 0 deletions

diff --git a/src/qml/qml/qqmlobjectcreator_p.h b/src/qml/qml/qqmlobjectcreator_p.h
index caee7b9d1d..982324be3c 100644
--- a/src/qml/qml/qqmlobjectcreator_p.h
+++ b/src/qml/qml/qqmlobjectcreator_p.h
@@ -90,6 +90,7 @@ public:
     QObject *create(int subComponentIndex = -1, QObject *parent = 0, QQmlInstantiationInterrupt *interrupt = 0);
     bool populateDeferredProperties(QObject *instance);
     QQmlContextData *finalize(QQmlInstantiationInterrupt &interrupt);
+    void cancel(QObject *object);
     void clear();
 
     QQmlComponentAttached **componentAttachment() const { return &sharedState->componentAttached; }