Convert "bool" members in ui::Widget to flags

src/ui/base.h

@@ -47,7 +47,9 @@ namespace ui {
     INITIALIZED      = 0x00000400, // The widget was already initialized by a theme.
     DIRTY            = 0x00000800, // The widget (or one child) is dirty (update_region != empty).
     HAS_TEXT         = 0x00001000, // The widget has text (at least setText() was called one time).
-    CTRL_RIGHT_CLICK = 0x00002000, // The widget should transform Ctrl+click to right-click on OS X.
+    DOUBLE_BUFFERED  = 0x00002000, // The widget is painted in a back-buffer and then flipped to the main display
+    TRANSPARENT      = 0x00004000, // The widget has transparent parts that needs the background painted before
+    CTRL_RIGHT_CLICK = 0x00008000, // The widget should transform Ctrl+click to right-click on OS X.
     PROPERTIES_MASK  = 0x0000ffff,
 
     HORIZONTAL       = 0x00010000,

src/ui/widget.cpp

@@ -69,8 +69,6 @@ Widget::Widget(WidgetType type)
   , m_bounds(0, 0, 0, 0)
   , m_parent(nullptr)
   , m_sizeHint(nullptr)
-  , m_doubleBuffered(false)
-  , m_transparent(false)
   , m_minSize(0, 0)
   , m_maxSize(INT_MAX, INT_MAX)
   , m_childSpacing(0)
@@ -1010,22 +1008,22 @@ bool Widget::paintEvent(Graphics* graphics)
 
 bool Widget::isDoubleBuffered() const
 {
-  return m_doubleBuffered;
+  return hasFlags(DOUBLE_BUFFERED);
 }
 
 void Widget::setDoubleBuffered(bool doubleBuffered)
 {
-  m_doubleBuffered = doubleBuffered;
+  enableFlags(DOUBLE_BUFFERED);
 }
 
 bool Widget::isTransparent() const
 {
-  return m_transparent;
+  return hasFlags(TRANSPARENT);
 }
 
 void Widget::setTransparent(bool transparent)
 {
-  m_transparent = transparent;
+  enableFlags(TRANSPARENT);
 }
 
 void Widget::invalidate()
@@ -1084,7 +1082,7 @@ GraphicsPtr Widget::getGraphics(const gfx::Rect& clip)
 
   // In case of double-buffering, we need to create the temporary
   // buffer only if the default surface is the screen.
-  if (m_doubleBuffered && defaultSurface->isDirectToScreen()) {
+  if (isDoubleBuffered() && defaultSurface->isDirectToScreen()) {
     surface = she::instance()->createSurface(clip.w, clip.h);
     graphics.reset(new Graphics(surface, -clip.x, -clip.y),
       DeleteGraphicsAndSurface(clip, surface));

src/ui/widget.h

@@ -392,8 +392,6 @@ namespace ui {
     WidgetsList m_children;       // Sub-widgets
     Widget* m_parent;             // Who is the parent?
     gfx::Size* m_sizeHint;
-    bool m_doubleBuffered;
-    bool m_transparent;
 
     // Widget size limits
     gfx::Size m_minSize, m_maxSize;