README improved

.gitignore

@@ -1,7 +1,9 @@
 Makefile
+.qmake.stash
 obj
 moc
 rcc
 lib
 bin
 qvg
+*.swp

README.md

@@ -2,4 +2,20 @@ QSkinny
 -------
 
 The (Q)Skinny library contains a set of lightweight Qt Quick Controls.
-It is implemented to 100% in C++, and can be used from C++ and/or QML application code.
+
+It is implemented to be 100% usable in C++, but can be used from C++ and/or QML
+application code. 
+
+Doing the implementation in C++ allows to make use of the "scene graph"
+classes. Building controls from scene graph nodes allows for a lighter implementation
+than found with stacking "heavier" objects like QObject or QQuickItem.
+
+Being "skinny" also means a design that separates concerns between
+the API and logic of the controls themselves, the styling of these controls,
+and the delegated rendering of the controls to the screen.
+
+The current selection of implemented controls is driven by the needs of specific
+projects and therefore may feel a bit random. Conceptually, though, any type of
+control fits into QSkinny, as long as it is usable from C++ (as opposed to only
+QML).
+

src/controls/QskImage.cpp

@@ -172,11 +172,6 @@ QSGNode* QskImage::updatePaintNode( QSGNode* oldNode, UpdatePaintNodeData* data
         if ( !isVisible() )
         {
             m_data->dirtyUpdate = true;
-
-#if 0
-            delete oldNode;
-            oldNode = nullptr;
-#endif
             return oldNode;
         }
     }

src/layouts/QskLayout.cpp

@@ -205,27 +205,7 @@ void QskLayout::adjustItemAt( int index )
 void QskLayout::updateLayout()
 {
     if ( m_data->isActive )
-    {
-#if 0
-        // the list of items to be polished is unordered,
-        // while setting geometries should always be done top down
-        // to avoid unnecessary ( potentially heavy ) operations
-
-        QQuickItem* item = this;
-
-        while ( QQuickItem* item = item->parentItem() )
-        {
-            if ( parent->isPolishScheduled() )
-            {
-                // putting parent at the end of the list
-                ...
-                return;
-            }
-        }
-#endif
-
         engine().setGeometries( alignedLayoutRect( layoutRect() ) );
-    }
 }
 
 QRectF QskLayout::alignedLayoutRect( const QRectF& rect ) const