Change QWidget::enterEvent signature to take a QEnterEvent

This is a source incompatible change for widget implementors.
Leaving the old enterEvent as a virtual overload is problematic due to
shadowing. Best to make a clean cut, widget reimplementors will get a compile
time warning if they mark their override as such, or if they try to call the
parent class implementation.

Addresses ### Qt 6 comment.

[ChangeLog][QtWidgets][QWidget] The virtual enterEvent handler now receives
a QEnterEvent, which contains information about mouse position and button
states, rather than a plain QEvent.

Change-Id: I233f594fd79c0c090983b3db8532913d00132fde
Reviewed-by: Shawn Rutledge <shawn.rutledge@qt.io>
Reviewed-by: Friedemann Kleint <Friedemann.Kleint@qt.io>
Reviewed-by: Lars Knoll <lars.knoll@qt.io>

2 files changed, 4 insertions, 4 deletions

diff --git a/tests/auto/widgets/graphicsview/qgraphicsproxywidget/tst_qgraphicsproxywidget.cpp b/tests/auto/widgets/graphicsview/qgraphicsproxywidget/tst_qgraphicsproxywidget.cpp
index ebf340db2a..34f27dbfcf 100644
--- a/tests/auto/widgets/graphicsview/qgraphicsproxywidget/tst_qgraphicsproxywidget.cpp
+++ b/tests/auto/widgets/graphicsview/qgraphicsproxywidget/tst_qgraphicsproxywidget.cpp
@@ -943,7 +943,7 @@ public:
         installEventFilter(this);
     }
 
-    void enterEvent(QEvent *event)
+    void enterEvent(QEnterEvent *event)
     {
         enterCount++;
         QWidget::enterEvent(event);
diff --git a/tests/auto/widgets/kernel/qwidget/tst_qwidget.cpp b/tests/auto/widgets/kernel/qwidget/tst_qwidget.cpp
index ae91685697..d670f19d0e 100644
--- a/tests/auto/widgets/kernel/qwidget/tst_qwidget.cpp
+++ b/tests/auto/widgets/kernel/qwidget/tst_qwidget.cpp
@@ -5596,7 +5596,7 @@ public:
         r = QRegion();
     }
 
-    void enterEvent(QEvent *) override { ++enters; }
+    void enterEvent(QEnterEvent *) override { ++enters; }
     void leaveEvent(QEvent *) override { ++leaves; }
 
     void resetCounts()
@@ -9627,7 +9627,7 @@ void tst_QWidget::syntheticEnterLeave()
     {
     public:
         using QWidget::QWidget;
-        void enterEvent(QEvent *) override { ++numEnterEvents; }
+        void enterEvent(QEnterEvent *) override { ++numEnterEvents; }
         void leaveEvent(QEvent *) override { ++numLeaveEvents; }
         int numEnterEvents = 0;
         int numLeaveEvents = 0;
@@ -9742,7 +9742,7 @@ void tst_QWidget::taskQTBUG_4055_sendSyntheticEnterLeave()
     {
     public:
         using QWidget::QWidget;
-        void enterEvent(QEvent *) override { ++numEnterEvents; }
+        void enterEvent(QEnterEvent *) override { ++numEnterEvents; }
         void mouseMoveEvent(QMouseEvent *event) override
         {
             QCOMPARE(event->button(), Qt::NoButton);