fluent2 scrollbars improved

skins/fluent2/QskFluent2Skin.cpp

@@ -1108,6 +1108,9 @@ void Editor::setupScrollViewMetrics()
         setMetric( aspect, 2 );
         setMetric( aspect | Q::Hovered, 6 );
         setMetric( aspect | Q::Pressed, 6 );
+
+        setBoxShape( subControl, 100, Qt::RelativeSize );
+        setAnimation( subControl | A::Metric, 100 );
     }
 
     /*
@@ -1118,26 +1121,57 @@ void Editor::setupScrollViewMetrics()
     setAlignment( Q::VerticalScrollBar, Qt::AlignHCenter );
     setAlignment( Q::HorizontalScrollBar, Qt::AlignVCenter );
 
+    // handles
+
     setBoxShape( Q::HorizontalScrollHandle, 100, Qt::RelativeSize );
     setBoxShape( Q::VerticalScrollHandle, 100, Qt::RelativeSize );
 
     const auto handleExtent = 40.0;
     setStrutSize( Q::HorizontalScrollHandle, handleExtent, 0.0 );
     setStrutSize( Q::VerticalScrollHandle, 0.0, handleExtent );
-
-    for ( auto subControl : { Q::HorizontalScrollBar, Q::VerticalScrollBar } )
-        setAnimation( subControl | A::Metric, 100 );
 }
 
 void Editor::setupScrollViewColors(
     QskAspect::Section section, const QskFluent2Theme& theme )
 {
+    using A = QskAspect;
     using Q = QskScrollView;
 
-    const auto fillColor = theme.palette.fillColor.controlStrong.defaultColor;
+    const auto& pal = theme.palette;
+
+    {
+        const auto fillColor = pal.fillColor.controlStrong.defaultColor;
 
         setGradient( Q::HorizontalScrollHandle | section, fillColor );
         setGradient( Q::VerticalScrollHandle | section, fillColor );
+    }
+
+    for ( auto subControl : { Q::HorizontalScrollBar, Q::VerticalScrollBar } )
+    {
+        auto fillColor = pal.fillColor.acrylic.background;
+
+#if 1
+        /*
+            With Fluent2 the scroll bar is supposed to be on top of scrollable
+            item. QskScrollViewSkinlet does not support this yet and we
+            always have the scrollbar on top of the panel. For the light
+            scheme this leads to white on white, so we better shade the scrollbar
+            for the moment: TODO ...
+         */
+        const auto v = qBlue( fillColor );
+        if ( v > 250 )
+        {
+            if ( v == qRed( fillColor ) && v == qGreen( fillColor ) )
+                fillColor = qRgba( 240, 240, 240, qAlpha( fillColor ) );
+        }
+#endif
+
+        setGradient( subControl, QskRgb::toTransparent( fillColor, 0 ) );
+        setGradient( subControl | Q::Hovered, fillColor );
+        setGradient( subControl | Q::Pressed, fillColor );
+
+        setAnimation( subControl | A::Color, 100 );
+    }
 }
 
 void Editor::setupSegmentedBarMetrics()

skins/fluent2/QskFluent2Theme.cpp

@@ -77,6 +77,8 @@ QskFluent2Theme::QskFluent2Theme( QskSkin::ColorScheme colorScheme,
             colors.accent.tertiary = toTransparentF( accentColors.secondary, 0.80 );
             colors.accent.disabled = rgbGray( 0, 0.2169 );
             colors.accent.selectedTextBackground = accentColors.primary;
+
+            colors.acrylic.background = rgbGray( 252, 0.85 );
         }
 
 #if 0
@@ -198,6 +200,8 @@ QskFluent2Theme::QskFluent2Theme( QskSkin::ColorScheme colorScheme,
             colors.accent.tertiary = toTransparentF( accentColors.tertiary, 0.80 );
             colors.accent.disabled = rgbGray( 255, 0.1581 );
             colors.accent.selectedTextBackground = accentColors.primary;
+
+            colors.acrylic.background = rgbGray( 44, 0.96 );
         }
 
 #if 0

skins/fluent2/QskFluent2Theme.h

@@ -107,6 +107,11 @@ class QSK_FLUENT2_EXPORT QskFluent2Theme
             QRgb disabled;
             QRgb selectedTextBackground;
         } accent;
+
+        struct
+        {
+            QRgb background;
+        } acrylic;
     };
 
     struct Elevation

src/controls/QskScrollViewSkinlet.cpp

@@ -39,6 +39,16 @@ static void qskAlignedHandle( qreal start, qreal end,
     }
 }
 
+static inline Qt::Orientation qskSubcontrolOrientation( QskAspect::Subcontrol subControl )
+{
+    using Q = QskScrollView;
+
+    if ( subControl == Q::HorizontalScrollBar || subControl == Q::HorizontalScrollHandle )
+        return Qt::Horizontal;
+    else
+        return Qt::Vertical;
+}
+
 QskScrollViewSkinlet::QskScrollViewSkinlet( QskSkin* skin )
     : Inherited( skin )
 {
@@ -87,55 +97,45 @@ QSGNode* QskScrollViewSkinlet::updateSubNode(
     switch ( nodeRole )
     {
         case PanelRole:
-        {
             return updateBoxNode( skinnable, node, Q::Panel );
-        }
+
         case ViewportRole:
-        {
             return updateBoxNode( skinnable, node, Q::Viewport );
-        }
 
         case HorizontalScrollHandleRole:
-        {
+            return updateScrollBarNode( scrollView, Q::HorizontalScrollHandle, node );
-            const auto rect = subControlRect( skinnable,
-                scrollView->contentsRect(), Q::HorizontalScrollHandle );
-
-            QskSkinStateChanger stateChanger( scrollView );
-            stateChanger.setStates( scrollView->scrollHandleStates( Qt::Horizontal ) );
-
-            return updateBoxNode( skinnable, node, rect, Q::HorizontalScrollHandle );
-        }
 
         case VerticalScrollHandleRole:
-        {
+            return updateScrollBarNode( scrollView, Q::VerticalScrollHandle, node );
-            const auto rect = subControlRect( skinnable,
-                scrollView->contentsRect(), Q::VerticalScrollHandle );
-
-            QskSkinStateChanger stateChanger( scrollView );
-            stateChanger.setStates( scrollView->scrollHandleStates( Qt::Vertical ) );
-
-            return updateBoxNode( skinnable, node, rect, Q::VerticalScrollHandle );
-        }
-
-        case ContentsRootRole:
-        {
-            return updateContentsRootNode( scrollView, node );
-        }
 
         case HorizontalScrollBarRole:
-        {
+            return updateScrollBarNode( scrollView, Q::HorizontalScrollBar, node );
-            return updateBoxNode( skinnable, node, Q::HorizontalScrollBar );
-        }
 
         case VerticalScrollBarRole:
-        {
+            return updateScrollBarNode( scrollView, Q::VerticalScrollBar, node );
-            return updateBoxNode( skinnable, node, Q::VerticalScrollBar );
+
-        }
+        case ContentsRootRole:
+            return updateContentsRootNode( scrollView, node );
+
     }
 
     return Inherited::updateSubNode( skinnable, nodeRole, node );
 }
 
+QSGNode* QskScrollViewSkinlet::updateScrollBarNode( const QskScrollView* scrollView,
+    QskAspect::Subcontrol subControl, QSGNode* node ) const
+{
+    const auto rect = subControlRect( scrollView,
+        scrollView->contentsRect(), subControl );
+    
+    const auto orientation = qskSubcontrolOrientation( subControl );
+
+    QskSkinStateChanger stateChanger( scrollView );
+    stateChanger.setStates( scrollView->scrollHandleStates( orientation ) );
+
+    return updateBoxNode( scrollView, node, rect, subControl );
+}
+
 QSGNode* QskScrollViewSkinlet::updateContentsRootNode(
     const QskScrollView* scrollView, QSGNode* node ) const
 {

src/controls/QskScrollViewSkinlet.h

@@ -47,6 +47,8 @@ class QSK_EXPORT QskScrollViewSkinlet : public QskSkinlet
 
   private:
     QSGNode* updateContentsRootNode( const QskScrollView*, QSGNode* ) const;
+    QSGNode* updateScrollBarNode(
+        const QskScrollView*, QskAspect::Subcontrol, QSGNode* ) const;
 
     QRectF viewportRect( const QskScrollView*, const QRectF& ) const;
     QRectF scrollBarRect( const QskScrollView*, const QRectF&, Qt::Orientation ) const;