From 985fcf1e2d9b0509558cc4bb7f7ad698ef0442f5 Mon Sep 17 00:00:00 2001
From: Uwe Rathmann <Uwe.Rathmann@tigertal.de>
Date: Mon, 6 Dec 2021 19:20:59 +0100
Subject: [PATCH] tabpage background fixed

---
 examples/gallery/Page.cpp | 24 ++++++++++++----------
 examples/gallery/Page.h   |  6 ++++++
 examples/gallery/main.cpp | 42 ++++++++++++++++++++++++++++++++++-----
 3 files changed, 57 insertions(+), 15 deletions(-)

diff --git a/examples/gallery/Page.cpp b/examples/gallery/Page.cpp
index 312bd7d1..0dbbfcf3 100644
--- a/examples/gallery/Page.cpp
+++ b/examples/gallery/Page.cpp
@@ -4,25 +4,29 @@
  *****************************************************************************/
 
 #include "Page.h"
-
 #include <QskRgbValue.h>
-#include <QskBoxShapeMetrics.h>
 
 Page::Page( Qt::Orientation orientation, QQuickItem* parent )
     : QskLinearBox( orientation, parent )
+    , m_gradient( QskRgb::GhostWhite )
 {
-    setBackgroundColor( Qt::gray );
-
-    setPanel( true );
-    setBoxShapeHint( QskBox::Panel, 8 );
-    setGradient( QskRgb::GhostWhite );
-
-    setMargins( 5 );
+    setMargins( 20 );
     setPadding( 10 );
     setSpacing( 10 );
 }
 
 void Page::setGradient( const QskGradient& gradient )
 {
-    setGradientHint( QskBox::Panel, gradient );
+    if ( gradient != m_gradient )
+    {
+        m_gradient = gradient;
+
+        if ( parentItem() && isVisibleToParent() )
+            parentItem()->update();
+    }
+}
+
+QskGradient Page::gradient() const
+{
+    return m_gradient;
 }
diff --git a/examples/gallery/Page.h b/examples/gallery/Page.h
index 431ba883..f0404294 100644
--- a/examples/gallery/Page.h
+++ b/examples/gallery/Page.h
@@ -6,10 +6,16 @@
 #pragma once
 
 #include <QskLinearBox.h>
+#include <QskGradient.h>
 
 class Page : public QskLinearBox
 {
   public:
     Page( Qt::Orientation, QQuickItem* parent = nullptr );
+
     void setGradient( const QskGradient& );
+    QskGradient gradient() const;
+
+  private:
+    QskGradient m_gradient;
 };
diff --git a/examples/gallery/main.cpp b/examples/gallery/main.cpp
index a7567fd0..4e5d278c 100644
--- a/examples/gallery/main.cpp
+++ b/examples/gallery/main.cpp
@@ -19,6 +19,42 @@
 
 #include <QGuiApplication>
 
+namespace
+{
+    class TabView : public QskTabView
+    {
+      public:
+        TabView( QQuickItem* parent = nullptr )
+            : QskTabView( parent )
+        {
+            setMargins( 10 );
+            setTabPosition( Qsk::Left );
+            setAutoFitTabs( true );
+
+            connect( this, &QskTabView::currentIndexChanged,
+                this, &TabView::updateViewPanel );
+        } 
+
+      protected:
+        void aboutToShow() override
+        {
+            updateViewPanel();
+        }
+
+      private:
+        void updateViewPanel()
+        {
+            /*
+                We should have a better way to set individual colors
+                for each tab page background
+             */
+            
+            if ( auto page = dynamic_cast< const ::Page* >( currentItem() ) )
+                setGradientHint( QskTabView::Page, page->gradient() );
+        }
+    };
+}
+
 int main( int argc, char* argv[] )
 {
 #ifdef ITEM_STATISTICS
@@ -32,11 +68,7 @@ int main( int argc, char* argv[] )
     SkinnyFont::init( &app );
     SkinnyShortcut::enable( SkinnyShortcut::AllShortcuts );
 
-    auto tabView = new QskTabView();
-
-    tabView->setMargins( 10 );
-    tabView->setTabPosition( Qsk::Left );
-    tabView->setAutoFitTabs( true );
+    auto tabView = new TabView();
 
     tabView->addTab( "Labels", new LabelPage() );
     tabView->addTab( "Sliders", new SliderPage() );