http://code.google.com/p/rpcs3/source/detail?r=44

wxWidgets/include/wx/univ/scrarrow.h

@@ -0,0 +1,112 @@
+///////////////////////////////////////////////////////////////////////////////
+// Name:        wx/univ/scrarrow.h
+// Purpose:     wxScrollArrows class
+// Author:      Vadim Zeitlin
+// Modified by:
+// Created:     22.01.01
+// RCS-ID:      $Id: scrarrow.h 42715 2006-10-30 12:24:13Z VS $
+// Copyright:   (c) 2001 SciTech Software, Inc. (www.scitechsoft.com)
+// Licence:     wxWindows licence
+///////////////////////////////////////////////////////////////////////////////
+
+#ifndef _WX_UNIV_SCRARROW_H_
+#define _WX_UNIV_SCRARROW_H_
+
+// ----------------------------------------------------------------------------
+// wxScrollArrows is not a control but just a class containing the common
+// functionality of scroll arrows, whether part of scrollbars, spin ctrls or
+// anything else.
+//
+// To customize its behaviour, wxScrollArrows doesn't use any virtual methods
+// but instead a callback pointer to a wxControlWithArrows object which is used
+// for all control-dependent stuff. Thus, to use wxScrollArrows, you just need
+// to derive from the wxControlWithArrows interface and implement its methods.
+// ----------------------------------------------------------------------------
+
+class WXDLLEXPORT wxControlWithArrows;
+class WXDLLEXPORT wxDC;
+class WXDLLEXPORT wxMouseEvent;
+class WXDLLEXPORT wxRect;
+class WXDLLEXPORT wxRenderer;
+
+// ----------------------------------------------------------------------------
+// wxScrollArrows: an abstraction of scrollbar arrow
+// ----------------------------------------------------------------------------
+
+class WXDLLEXPORT wxScrollArrows
+{
+public:
+    enum Arrow
+    {
+        Arrow_None = -1,
+        Arrow_First,        // left or top
+        Arrow_Second,       // right or bottom
+        Arrow_Max
+    };
+
+    // ctor requires a back pointer to wxControlWithArrows
+    wxScrollArrows(wxControlWithArrows *control);
+
+    // draws the arrow on the given DC in the given rectangle, uses
+    // wxControlWithArrows::GetArrowState() to get its current state
+    void DrawArrow(Arrow arrow, wxDC& dc, const wxRect& rect,
+                   bool scrollbarLike = false) const;
+
+    // process a mouse move, enter or leave event, possibly calling
+    // wxControlWithArrows::SetArrowState() if
+    // wxControlWithArrows::HitTestArrow() says that the mouse has left/entered
+    // an arrow
+    bool HandleMouseMove(const wxMouseEvent& event) const;
+
+    // process a mouse click event
+    bool HandleMouse(const wxMouseEvent& event) const;
+
+    // dtor
+    ~wxScrollArrows();
+
+private:
+    // set or clear the wxCONTROL_CURRENT flag for the arrow
+    void UpdateCurrentFlag(Arrow arrow, Arrow arrowCur) const;
+
+    // the main control
+    wxControlWithArrows *m_control;
+
+    // the data for the mouse capture
+    struct wxScrollArrowCaptureData *m_captureData;
+};
+
+// ----------------------------------------------------------------------------
+// wxControlWithArrows: interface implemented by controls using wxScrollArrows
+// ----------------------------------------------------------------------------
+
+class WXDLLEXPORT wxControlWithArrows
+{
+public:
+    virtual ~wxControlWithArrows() {}
+
+    // get the renderer to use for drawing the arrows
+    virtual wxRenderer *GetRenderer() const = 0;
+
+    // get the controls window (used for mouse capturing)
+    virtual wxWindow *GetWindow() = 0;
+
+    // get the orientation of the arrows (vertical or horizontal)
+    virtual bool IsVertical() const = 0;
+
+    // get the state of this arrow as combination of wxCONTROL_XXX flags
+    virtual int GetArrowState(wxScrollArrows::Arrow arrow) const = 0;
+
+    // set or clear the specified flag in the arrow state: this function is
+    // responsible for refreshing the control
+    virtual void SetArrowFlag(wxScrollArrows::Arrow arrow,
+                              int flag, bool set = true) = 0;
+
+    // hit testing: return on which arrow the point is (or Arrow_None)
+    virtual wxScrollArrows::Arrow HitTestArrow(const wxPoint& pt) const = 0;
+
+    // called when the arrow is pressed, return true to continue scrolling and
+    // false to stop it
+    virtual bool OnArrow(wxScrollArrows::Arrow arrow) = 0;
+};
+
+#endif // _WX_UNIV_SCRARROW_H_