From 865b43dbf3f220cce61d245b7042e777e834952c Mon Sep 17 00:00:00 2001
From: J-P Nurmi <jpnurmi@digia.com>
Date: Mon, 5 Aug 2013 13:51:13 +0200
Subject: [PATCH] QScrollBar: handle QWheelEvent::Phase for transient
 scrollbars

Transient scrollbars should become and stay visible when touching the
pad with two fingers.

Change-Id: Ic36ba56019f484cedb2404550551ebe68ea6f285
Reviewed-by: J-P Nurmi <jpnurmi@digia.com>
Reviewed-by: Shawn Rutledge <shawn.rutledge@digia.com>
---
 src/widgets/widgets/qscrollbar.cpp | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/src/widgets/widgets/qscrollbar.cpp b/src/widgets/widgets/qscrollbar.cpp
index e1e2723a2db..4ed91204cdc 100644
--- a/src/widgets/widgets/qscrollbar.cpp
+++ b/src/widgets/widgets/qscrollbar.cpp
@@ -510,6 +510,11 @@ void QScrollBar::wheelEvent(QWheelEvent *event)
     Q_D(QScrollBar);
     if (d->scrollByDelta(event->orientation(), event->modifiers(), delta))
         event->accept();
+
+    if (event->phase() == QWheelEvent::Started)
+        d->setTransient(false);
+    else if (event->phase() == QWheelEvent::Ended)
+        d->setTransient(true);
 }
 #endif