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 * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
 * for the specific language governing rights and limitations under the
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 * The Original Code is Mozilla Communicator client code.
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 * The Initial Developer of the Original Code is
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 * Portions created by the Initial Developer are Copyright (C) 1998
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/**

  Eric D Vaughan
  A frame that can have multiple children. Only one child may be displayed at one time. So the
  can be flipped though like a deck of cards.
 
**/

#ifndef nsDeckFrame_h___
#define nsDeckFrame_h___

#include "nsBoxFrame.h"

class nsDeckFrame : public nsBoxFrame
{
public:

  friend nsIFrame* NS_NewDeckFrame(nsIPresShell* aPresShell,
                                   nsStyleContext* aContext);

  NS_IMETHOD AttributeChanged(PRInt32         aNameSpaceID,
                              nsIAtom*        aAttribute,
                              PRInt32         aModType);

  NS_IMETHOD DoLayout(nsBoxLayoutState& aState);

  NS_IMETHOD BuildDisplayList(nsDisplayListBuilder*   aBuilder,
                              const nsRect&           aDirtyRect,
                              const nsDisplayListSet& aLists);

  NS_IMETHOD BuildDisplayListForChildren(nsDisplayListBuilder*   aBuilder,
                                         const nsRect&           aDirtyRect,
                                         const nsDisplayListSet& aLists);
                                         
  NS_IMETHOD Init(nsIContent*      aContent,
                  nsIFrame*        aParent,
                  nsIFrame*        aPrevInFlow);

  virtual nsIAtom* GetType() const;

#ifndef MOZ_GFX_OPTIMIZE_MOBILE
  virtual PRBool ChildrenMustHaveWidgets() const { return PR_TRUE; }
#endif

#ifdef NS_DEBUG
  NS_IMETHOD GetFrameName(nsAString& aResult) const
  {
      return MakeFrameName(NS_LITERAL_STRING("Deck"), aResult);
  }
#endif

  nsDeckFrame(nsIPresShell* aPresShell, nsStyleContext* aContext);

protected:

  // REVIEW: Sorry, I couldn't resist devirtualizing these.
  nsIBox* GetSelectedBox();
  void IndexChanged(nsPresContext* aPresContext);
  PRInt32 GetSelectedIndex();
  void HideBox(nsPresContext* aPresContext, nsIBox* aBox);
  void ShowBox(nsPresContext* aPresContext, nsIBox* aBox);

private:

  PRInt32 mIndex;

}; // class nsDeckFrame

#endif