From 8738f09b9fc1b35e3dc78211368d87069f3071f7 Mon Sep 17 00:00:00 2001
From: J-P Nurmi <jpnurmi@digia.com>
Date: Sat, 26 Jul 2014 17:29:54 +0200
Subject: Reduce the default frame rate of style animations

Halves the amount of paint events triggered by transient scrollbars.

Task-number: QTBUG-30316
Change-Id: Ifdf968d5c45013332758a6b751ce11d1ef2a2ca8
Reviewed-by: Gabriel de Dietrich <gabriel.dedietrich@digia.com>
---
 src/widgets/styles/qstyleanimation_p.h | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

(limited to 'src/widgets/styles/qstyleanimation_p.h')

diff --git a/src/widgets/styles/qstyleanimation_p.h b/src/widgets/styles/qstyleanimation_p.h
index c344858812..19e629cb25 100644
--- a/src/widgets/styles/qstyleanimation_p.h
+++ b/src/widgets/styles/qstyleanimation_p.h
@@ -78,8 +78,21 @@ public:
     QTime startTime() const;
     void setStartTime(const QTime &time);
 
+    enum FrameRate {
+        DefaultFps,
+        SixtyFps,
+        ThirtyFps,
+        TwentyFps
+    };
+
+    FrameRate frameRate() const;
+    void setFrameRate(FrameRate fps);
+
     void updateTarget();
 
+public Q_SLOTS:
+    void start();
+
 protected:
     virtual bool isUpdateNeeded() const;
     virtual void updateCurrentTime(int time);
@@ -88,6 +101,8 @@ private:
     int _delay;
     int _duration;
     QTime _startTime;
+    FrameRate _fps;
+    int _skip;
 };
 
 class QProgressStyleAnimation : public QStyleAnimation
-- 
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