macOS: Don't assume NSSlider is never flipped

We need to take into account the possibility that the slider is flipped,
otherwise we end up with inverted rects, as noticed in Big Sur.

The logic to use the ticks as input to whether the bar rect should be
inverted didn't make sense.  If the graphics context has been flipped,
then we should reflect that through the slider.

Pick-to: 5.15
Pick-to: 5.12
Change-Id: I3574027c14807460affb42a9763211981c4ed528
Reviewed-by: Timur Pocheptsov <timur.pocheptsov@qt.io>

1 files changed, 7 insertions, 7 deletions

diff --git a/src/plugins/styles/mac/qmacstyle_mac.mm b/src/plugins/styles/mac/qmacstyle_mac.mm
index 71f080ab13..4f51f63665 100644
--- a/src/plugins/styles/mac/qmacstyle_mac.mm
+++ b/src/plugins/styles/mac/qmacstyle_mac.mm
@@ -506,7 +506,7 @@ static void fixStaleGeometry(NSSlider *slider)
         return;
 
     NSSliderCell *cell = slider.cell;
-    const NSRect barRect = [cell barRectFlipped:NO];
+    const NSRect barRect = [cell barRectFlipped:slider.isFlipped];
     const NSSize sliderSize = slider.frame.size;
     CGFloat difference = 0.;
     if (slider.vertical)
@@ -5328,7 +5328,7 @@ void QMacStyle::drawComplexControl(ComplexControl cc, const QStyleOptionComplex
 
             CGPoint pressPoint;
             if (isPressed) {
-                const CGRect knobRect = [slider.cell knobRectFlipped:NO];
+                const CGRect knobRect = [slider.cell knobRectFlipped:slider.isFlipped];
                 pressPoint.x = CGRectGetMidX(knobRect);
                 pressPoint.y = CGRectGetMidY(knobRect);
                 [slider.cell startTrackingAt:pressPoint inView:slider];
@@ -5386,7 +5386,7 @@ void QMacStyle::drawComplexControl(ComplexControl cc, const QStyleOptionComplex
                     if (hasDoubleTicks)
                         slider.numberOfTickMarks = 0;
 
-                    const CGRect barRect = [cell barRectFlipped:hasTicks];
+                    const CGRect barRect = [cell barRectFlipped:slider.isFlipped];
                     if (drawBar) {
                         if (!isHorizontal && !sl->upsideDown && (hasDoubleTicks || !hasTicks)) {
                             // The logic behind verticalFlip and upsideDown is the twisted one.
@@ -5773,8 +5773,8 @@ QStyle::SubControl QMacStyle::hitTestComplexControl(ComplexControl cc,
                 break;
 
             NSSliderCell *cell = slider.cell;
-            const auto barRect = QRectF::fromCGRect([cell barRectFlipped:hasTicks]);
-            const auto knobRect = QRectF::fromCGRect([cell knobRectFlipped:NO]);
+            const auto barRect = QRectF::fromCGRect([cell barRectFlipped:slider.isFlipped]);
+            const auto knobRect = QRectF::fromCGRect([cell knobRectFlipped:slider.isFlipped]);
             if (knobRect.contains(pt)) {
                 sc = SC_SliderHandle;
             } else if (barRect.contains(pt)) {
@@ -5878,7 +5878,7 @@ QRect QMacStyle::subControlRect(ComplexControl cc, const QStyleOptionComplex *op
 
             NSSliderCell *cell = slider.cell;
             if (sc == SC_SliderHandle) {
-                ret = QRectF::fromCGRect([cell knobRectFlipped:NO]).toRect();
+                ret = QRectF::fromCGRect([cell knobRectFlipped:slider.isFlipped]).toRect();
                 if (isHorizontal) {
                     ret.setTop(sl->rect.top());
                     ret.setBottom(sl->rect.bottom());
@@ -5887,7 +5887,7 @@ QRect QMacStyle::subControlRect(ComplexControl cc, const QStyleOptionComplex *op
                     ret.setRight(sl->rect.right());
                 }
             } else if (sc == SC_SliderGroove) {
-                ret = QRectF::fromCGRect([cell barRectFlipped:hasTicks]).toRect();
+                ret = QRectF::fromCGRect([cell barRectFlipped:slider.isFlipped]).toRect();
             } else if (hasTicks && sc == SC_SliderTickmarks) {
                 const auto tickMarkRect = QRectF::fromCGRect([cell rectOfTickMarkAtIndex:0]);
                 if (isHorizontal)