From 8675a31d2a99ed72d9a635b4d5854aa98654ef05 Mon Sep 17 00:00:00 2001
From: Kai Uwe Broulik <kde@privat.broulik.de>
Date: Sat, 31 Dec 2016 13:42:27 +0100
Subject: [PATCH] [Plasma ScrollViewStyle] Show scroll bar background only on
 hover

This makes it consistent with the Breeze widget style.
The other themes (Air and Oxygen) didn't even have a scroll bar background.

Differential Revision: https://phabricator.kde.org/D3828
---
 src/declarativeimports/plasmastyle/ScrollViewStyle.qml | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/src/declarativeimports/plasmastyle/ScrollViewStyle.qml b/src/declarativeimports/plasmastyle/ScrollViewStyle.qml
index 8c1b681ac..accea15bf 100644
--- a/src/declarativeimports/plasmastyle/ScrollViewStyle.qml
+++ b/src/declarativeimports/plasmastyle/ScrollViewStyle.qml
@@ -143,6 +143,13 @@ QtQuickControlStyle.ScrollViewStyle {
         prefix: styleData.horizontal ? "background-horizontal" : "background-vertical"
         implicitWidth: widthHint
         colorGroup: PlasmaCore.ColorScope.colorGroup
+        opacity: styleData.hovered ? 1 : 0
+        Behavior on opacity {
+            NumberAnimation {
+                duration: units.longDuration
+                easing.type: Easing.InOutQuad
+            }
+        }
     }
 
     handle: PlasmaCore.FrameSvgItem {