From efec288f58dc18f6a571bfedf9d19e3fbf12a18f Mon Sep 17 00:00:00 2001
From: Andy Shaw <andy.shaw@qt.io>
Date: Wed, 17 Jan 2018 13:53:19 +0100
Subject: itemviews: When an index widget gets focus, update the current index

By ensuring that the current index follows the focus of an index widget,
we can ensure that moving the cursor will happen in the way that is
expected from the focused widget.

Task-number: QTBUG-27793
Change-Id: Ia36891a94ce41c7d12fba678de23a6f3b69374ae
Reviewed-by: Richard Moe Gustavsen <richard.gustavsen@qt.io>
Reviewed-by: Christian Ehrlicher <ch.ehrlicher@gmx.de>
---
 src/widgets/itemviews/qabstractitemview.cpp | 20 ++++++++++++++++++++
 src/widgets/itemviews/qabstractitemview.h   |  1 +
 2 files changed, 21 insertions(+)

(limited to 'src')

diff --git a/src/widgets/itemviews/qabstractitemview.cpp b/src/widgets/itemviews/qabstractitemview.cpp
index 5bf4fec92c..a07297863d 100644
--- a/src/widgets/itemviews/qabstractitemview.cpp
+++ b/src/widgets/itemviews/qabstractitemview.cpp
@@ -3217,12 +3217,14 @@ void QAbstractItemView::setIndexWidget(const QModelIndex &index, QWidget *widget
     if (QWidget *oldWidget = indexWidget(index)) {
         d->persistent.remove(oldWidget);
         d->removeEditor(oldWidget);
+        oldWidget->removeEventFilter(this);
         oldWidget->deleteLater();
     }
     if (widget) {
         widget->setParent(viewport());
         d->persistent.insert(widget);
         d->addEditor(index, widget, true);
+        widget->installEventFilter(this);
         widget->show();
         dataChanged(index, index); // update the geometry
         if (!d->delayedPendingLayout)
@@ -4499,6 +4501,24 @@ QModelIndexList QAbstractItemViewPrivate::selectedDraggableIndexes() const
     return indexes;
 }
 
+/*!
+    \reimp
+*/
+
+bool QAbstractItemView::eventFilter(QObject *object, QEvent *event)
+{
+    Q_D(QAbstractItemView);
+    if (object == this || object == viewport() || event->type() != QEvent::FocusIn)
+        return QAbstractScrollArea::eventFilter(object, event);
+    QWidget *widget = qobject_cast<QWidget *>(object);
+    // If it is not a persistent widget then we did not install
+    // the event filter on it, so assume a base implementation is
+    // filtering
+    if (!widget || !d->persistent.contains(widget))
+        return QAbstractScrollArea::eventFilter(object, event);
+    setCurrentIndex(d->indexForEditor(widget));
+    return false;
+}
 
 QT_END_NAMESPACE
 
diff --git a/src/widgets/itemviews/qabstractitemview.h b/src/widgets/itemviews/qabstractitemview.h
index 96745a84ea..8a138bdb67 100644
--- a/src/widgets/itemviews/qabstractitemview.h
+++ b/src/widgets/itemviews/qabstractitemview.h
@@ -346,6 +346,7 @@ protected:
     void resizeEvent(QResizeEvent *event) override;
     void timerEvent(QTimerEvent *event) override;
     void inputMethodEvent(QInputMethodEvent *event) override;
+    bool eventFilter(QObject *object, QEvent *event) override;
 
 #ifndef QT_NO_DRAGANDDROP
     enum DropIndicatorPosition { OnItem, AboveItem, BelowItem, OnViewport };
-- 
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