From da2e7b1331cb27142058a9f1d1debd363c5dd151 Mon Sep 17 00:00:00 2001
From: Peter Varga <pvarga@inf.u-szeged.hu>
Date: Mon, 3 Jul 2017 15:27:02 +0200
Subject: Use QStyleHints::wheelScrollLines when create WebMouseWheelEvent

Change-Id: I01fb4f9ff943df935887b40cb75d7656d2b6ac20
Reviewed-by: Allan Sandfeld Jensen <allan.jensen@qt.io>
---
 src/core/web_event_factory.cpp | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

(limited to 'src')

diff --git a/src/core/web_event_factory.cpp b/src/core/web_event_factory.cpp
index 65f8431d7..7f164d6bd 100644
--- a/src/core/web_event_factory.cpp
+++ b/src/core/web_event_factory.cpp
@@ -72,12 +72,12 @@
 
 #include <QCoreApplication>
 #include <QElapsedTimer>
+#include <QGuiApplication>
 #include <QKeyEvent>
 #include <QMouseEvent>
+#include <QStyleHints>
 #include <QWheelEvent>
 
-static const int wheelScrollLines = 3; // FIXME: Still not available in QStyleHints in 5.1
-
 using namespace blink;
 
 static int windowsKeyCodeForKeyEvent(unsigned int keycode, bool isKeypad)
@@ -1268,6 +1268,11 @@ blink::WebMouseWheelEvent WebEventFactory::toWebWheelEvent(QWheelEvent *ev, doub
     // a pixel delta based on ticks and scroll per line.
     static const float cDefaultQtScrollStep = 20.f;
 
+#if (QT_VERSION >= QT_VERSION_CHECK(5, 9, 0))
+    const int wheelScrollLines = QGuiApplication::styleHints()->wheelScrollLines();
+#else
+    const int wheelScrollLines = 3;
+#endif
     webEvent.deltaX = webEvent.wheelTicksX * wheelScrollLines * cDefaultQtScrollStep;
     webEvent.deltaY = webEvent.wheelTicksY * wheelScrollLines * cDefaultQtScrollStep;
 
-- 
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