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lightning-sunbird  0.9+nobinonly
nsNativeScrollbar.h
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00002 /* ***** BEGIN LICENSE BLOCK *****
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00017  * The Initial Developer of the Original Code is 
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00024  * Alternatively, the contents of this file may be used under the terms of
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00037 
00038 
00039 #ifndef nsNativeScrollbar_h__
00040 #define nsNativeScrollbar_h__
00041 
00042 #include "nsMacControl.h"
00043 #include "nsINativeScrollbar.h"
00044 #include <Controls.h>
00045 #include "nsIContent.h"
00046 
00047 class nsIScrollbarMediator;
00048 
00049 
00050 //
00051 // nsNativeScrollbar
00052 //
00053 // A wrapper around a MacOS native scrollbar that knows how to work
00054 // with a stub gecko frame to scroll in the GFXScrollFrame mechanism
00055 //
00056 
00057 
00058 class nsNativeScrollbar : public nsMacControl, public nsINativeScrollbar
00059 {
00060 private:
00061   typedef nsMacControl Inherited;
00062 
00063 public:
00064                 nsNativeScrollbar();
00065   virtual       ~nsNativeScrollbar();
00066 
00067   NS_IMETHOD    Destroy();
00068 
00069   NS_DECL_ISUPPORTS_INHERITED
00070   NS_DECL_NSINATIVESCROLLBAR
00071 
00072 protected:
00073 
00074   // nsWindow Interface
00075   virtual PRBool DispatchMouseEvent(nsMouseEvent &aEvent);
00076   
00077   virtual ControlPartCode GetControlHiliteState();
00078 
00079   ControlHandle   GetControl() { return mControl; }
00080   
00081   void UpdateContentPosition(PRUint32 inNewPos);
00082 
00083 private:
00084 
00085   friend class StNativeControlActionProcOwner;
00086   
00087   static pascal void ScrollActionProc(ControlHandle, ControlPartCode);
00088   void DoScrollAction(ControlPartCode);
00089 
00090 // DATA
00091 private:
00092 
00093   nsIContent*       mContent;          // the content node that affects the scrollbar's value
00094   nsIScrollbarMediator* mMediator;     // for scrolling with outliners
00095   nsISupports*      mScrollbar;        // for calling into the mediator
00096   
00097   PRUint32          mMaxValue;
00098   PRUint32          mVisibleImageSize;
00099   PRUint32          mLineIncrement;
00100   PRBool            mMouseDownInScroll;
00101   ControlPartCode   mClickedPartCode;
00102 };
00103 
00104 
00105 
00106 #endif // nsNativeScrollbar_