From fe7bf854f8f1c2a31ee7c5d245604a2fb860c858 Mon Sep 17 00:00:00 2001
From: Andy Shaw <andy.shaw@qt.io>
Date: Wed, 10 Mar 2021 12:22:32 +0100
Subject: [PATCH] macOS: Don't draw scrollbar handle when there is no range
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If the minimum and maximum is set to be the same then we should not
draw the handle. An empty groove should be shown instead.

Change-Id: Ie79f55cd761f9a8f614967c40c23a7f59e700a0f
Reviewed-by: Tor Arne Vestbø <tor.arne.vestbo@qt.io>
(cherry picked from commit aac33296e618e617ab9e05b3c71682a13f2d5dfc)
Reviewed-by: Qt Cherry-pick Bot <cherrypick_bot@qt-project.org>
---
 src/plugins/styles/mac/qmacstyle_mac.mm | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/plugins/styles/mac/qmacstyle_mac.mm b/src/plugins/styles/mac/qmacstyle_mac.mm
index dad81dc8a18..10a2da4a908 100644
--- a/src/plugins/styles/mac/qmacstyle_mac.mm
+++ b/src/plugins/styles/mac/qmacstyle_mac.mm
@@ -5181,7 +5181,7 @@ void QMacStyle::drawComplexControl(ComplexControl cc, const QStyleOptionComplex
         if (const QStyleOptionSlider *sb = qstyleoption_cast<const QStyleOptionSlider *>(opt)) {
 
             const bool drawTrack = sb->subControls & SC_ScrollBarGroove;
-            const bool drawKnob = sb->subControls & SC_ScrollBarSlider;
+            const bool drawKnob = sb->subControls & SC_ScrollBarSlider && sb->minimum != sb->maximum;
             if (!drawTrack && !drawKnob)
                 break;