• There is no mechanism for QGraphicsItem to send the CloseSoftwareInputPanel, which it should as it is a common functionality for all the input method enabled QGraphicsItems.
• And Since graphicsscene doesn't handle CloseSoftwareInputPanel, all the QWidget (eg. QLineEdit , QTextEdit etc.) which are added as proxy to the scene, will never be able to send the CloseSoftwareInputPanel event, as we always return from QApplications in below function.

void QApplicationPrivate::setFocusWidget(QWidget *focus, Qt::FocusReason reason)
{
#ifndef QT_NO_GRAPHICSVIEW
    if (focus && focus->window()->graphicsProxyWidget())
        	return;
#endif
.
.
         }                        

So in short QGraphicsScene should send QEvent::CloseSoftwareInputPanel for all the QGraphicsItem which accepts inputMethod events.

This is a critical feature for our inputmethod plugins. As without this proxy widgets are not sending closepanel events and we are not able to close our input panel.