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nsNativeScrollbar.h
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00001 /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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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 "nsChildView.h"
00043 
00044 #include "nsINativeScrollbar.h"
00045 #include "nsIContent.h"
00046 
00047 #import "mozView.h"
00048 
00049 class nsIScrollbarMediator;
00050 
00051 @class NativeScrollbarView;
00052 
00053 //
00054 // nsNativeScrollbar
00055 //
00056 // A wrapper around a MacOS native scrollbar that knows how to work
00057 // with a stub gecko frame to scroll in the GFXScrollFrame mechanism
00058 //
00059 
00060 class nsNativeScrollbar : public nsChildView, public nsINativeScrollbar
00061 {
00062 private:
00063   typedef nsChildView Inherited;
00064 
00065 public:
00066                 nsNativeScrollbar();
00067   virtual       ~nsNativeScrollbar();
00068   
00069   NS_DECL_ISUPPORTS_INHERITED
00070   NS_DECL_NSINATIVESCROLLBAR
00071 
00072     // called from the NativeScrollbarView when someone hits a part
00073     // of the scrollbar.
00074   void DoScroll(NSScrollerPart inPart);
00075   
00076 protected:
00077 
00078   // nsWindow Interface
00079   virtual PRBool DispatchMouseEvent(nsMouseEvent &aEvent);
00080   NS_IMETHOD Show(PRBool bState);
00081   NS_IMETHOD Enable(PRBool bState);
00082   NS_IMETHOD IsEnabled(PRBool* outState);
00083   
00084   NSScroller* GetControl() { return (NSScroller*)mView; }
00085 
00086   void UpdateContentPosition(PRUint32 inNewPos);
00087   
00088   void RecreateHorizontalScrollbar();
00089 
00090   virtual NSView*   CreateCocoaView(NSRect inFrame);
00091   virtual GrafPtr   GetQuickDrawPort();
00092 
00093   void              UpdateScroller();
00094   
00095   NativeScrollbarView*    ScrollbarView() const { return (NativeScrollbarView*)mView; }
00096   
00097 // DATA
00098 private:
00099 
00100   nsIContent*       mContent;          // the content node that affects the scrollbar's value
00101   nsIScrollbarMediator* mMediator;     // for scrolling with outliners
00102   nsISupports*      mScrollbar;        // for calling into the mediator
00103 
00104   PRUint32          mValue;
00105   PRUint32          mMaxValue;
00106   PRUint32          mVisibleImageSize;
00107   PRUint32          mLineIncrement;
00108   PRBool            mIsEnabled;
00109 };
00110 
00111 
00112 @interface NativeScrollbarView : NSScroller<mozView>
00113 {
00114     // Our window [WEAK]
00115   NSWindow* mWindow;
00116   
00117     // the nsNativeScrollbar that created this view. It retains this NSView, so
00118     // the link back to it must be weak. [WEAK]
00119   nsNativeScrollbar* mGeckoChild;
00120 
00121     // YES when we're in a tracking loop
00122   BOOL      mInTracking;
00123 
00124   // rects that were invalidated during a draw, so have pending drawing
00125   NSMutableArray* mPendingDirtyRects;
00126   BOOL mPendingFullDisplay;
00127 }
00128 
00129   // default initializer
00130 - (id)initWithFrame:(NSRect)frameRect geckoChild:(nsNativeScrollbar*)inChild;
00131   // overridden parent class initializer
00132 - (id)initWithFrame:(NSRect)frameRect;
00133 
00134 - (IBAction)scroll:(NSScroller*)sender;
00135 
00136 @end
00137 
00138 
00139 #endif // nsNativeScrollbar_