fix warnings about calling an inline function before it is defined inline

[wxWidgets.git] / include / wx / dcbuffer.h

diff --git a/include/wx/dcbuffer.h b/include/wx/dcbuffer.h
index 1b5d728020bb0c062c7034d91b6e5f92e97bfcdb..216f4f970b6fb7d57d7ba03fdef8f6e4595b8cd8 100644 (file)
--- a/include/wx/dcbuffer.h
+++ b/include/wx/dcbuffer.h
@@ -14,36 +14,88 @@
 
 #include "wx/dcmemory.h"
 #include "wx/dcclient.h"
 
 #include "wx/dcmemory.h"
 #include "wx/dcclient.h"

+#include "wx/window.h"
+
+
+// I think this patch should be test on wxMac with
+// wxTEST_PAINTDCDELEGATION as 1, and then with
+// with wxTEST_MEMORYDCDELEGATION as 1.
+#define wxTEST_PAINTDCDELEGATION        0
+#define wxTEST_MEMORYDCDELEGATION       0
+
+
+// Split platforms into two groups - those which have well-working
+// double-buffering by default, and those which do not.
+#if defined(__WXMAC__) || defined(__WXGTK20__)
+    #define wxALWAYS_NATIVE_DOUBLE_BUFFER       1
+#else
+    #define wxALWAYS_NATIVE_DOUBLE_BUFFER       0
+#endif
+
+
+#if wxTEST_PAINTDCDELEGATION || wxTEST_MEMORYDCDELEGATION
+    #undef wxALWAYS_NATIVE_DOUBLE_BUFFER
+    #define wxALWAYS_NATIVE_DOUBLE_BUFFER 0
+#endif

 
 
 // ----------------------------------------------------------------------------
 // Double buffering helper.
 // ----------------------------------------------------------------------------
 
 
 
 // ----------------------------------------------------------------------------
 // Double buffering helper.
 // ----------------------------------------------------------------------------
 

-class wxBufferedDC : public wxMemoryDC
+// Assumes the buffer bitmap covers the entire scrolled window,
+// and prepares the window DC accordingly
+#define wxBUFFER_VIRTUAL_AREA       0x01
+
+// Assumes the buffer bitmap only covers the client area;
+// does not prepare the window DC
+#define wxBUFFER_CLIENT_AREA        0x02
+
+class WXDLLEXPORT wxBufferedDC : public wxDC

 {
 public:
     // Default ctor, must subsequently call Init for two stage construction.
 {
 public:
     // Default ctor, must subsequently call Init for two stage construction.

-    wxBufferedDC() : m_dc( 0 )
+    wxBufferedDC() : wxDC(), m_targetDc(NULL), m_mainDc(NULL),
+                     m_buffer(NULL), m_style(0)

     {
     }
 
     // Construct a wxBufferedDC using a user supplied buffer.
     {
     }
 
     // Construct a wxBufferedDC using a user supplied buffer.

-    wxBufferedDC(wxDC *dc, const wxBitmap &buffer)
-        : m_dc( dc ),
-          m_buffer( buffer )
+    wxBufferedDC(wxDC *dc,
+                 const wxBitmap &buffer = wxNullBitmap,
+                 int style = wxBUFFER_CLIENT_AREA)
+        : wxDC(),
+          m_targetDc(NULL),
+          m_mainDc(NULL)

     {
     {

-        UseBuffer();
+        // All other members except dcs are initialized in Init
+        Init(dc, buffer, style);

     }
 
     // Construct a wxBufferedDC with an internal buffer of 'area'
     // (where area is usually something like the size of the window
     // being buffered)
     }
 
     // Construct a wxBufferedDC with an internal buffer of 'area'
     // (where area is usually something like the size of the window
     // being buffered)

-    wxBufferedDC(wxDC *dc, const wxSize &area)
-        : m_dc( dc ),
-          m_buffer( area.GetWidth(), area.GetHeight() )
+    wxBufferedDC(wxDC *dc, const wxSize &area, int style = wxBUFFER_CLIENT_AREA)
+        : wxDC(),
+          m_targetDc(NULL),
+          m_mainDc(NULL)

     {
     {

-        UseBuffer();
+        // All other members except dcs are initialized in Init
+        Init(NULL, dc, area, style);
+    }
+
+    // Same, but also receives window to detect whether it is
+    // natively double-buffered.
+    wxBufferedDC(wxWindow* win,
+                 wxDC *dc,
+                 const wxSize &area,
+                 int style = wxBUFFER_CLIENT_AREA)
+        : wxDC(),
+          m_targetDc(NULL),
+          m_mainDc(NULL)
+    {
+        // All other members except dcs are initialized in Init
+        Init(win, dc, area, style);

     }
 
     // default copy ctor ok.
     }
 
     // default copy ctor ok.


@@ -51,23 +103,55 @@ public:
     // The usually desired  action in the dtor is to blit the buffer.
     virtual ~wxBufferedDC()
     {
     // The usually desired  action in the dtor is to blit the buffer.
     virtual ~wxBufferedDC()
     {

-        if ( m_dc ) UnMask();
+        UnMask();

     }
 
     }
 

-    // These reimplement the actions of the ctors for two stage creation, but
-    // are not used by the ctors themselves to save a few cpu cycles.
-    void Init(wxDC *dc, const wxBitmap &buffer)
+    void Init(wxDC *dc,
+              const wxBitmap &buffer,
+              int style = wxBUFFER_CLIENT_AREA)

     {
     {

-        wxASSERT_MSG( m_dc == 0 && m_buffer == wxNullBitmap,
-                      _T("wxBufferedDC already initialised") );
-        m_dc = dc;
-        m_buffer = buffer;
+        wxASSERT_MSG( m_mainDc == NULL,
+                      wxT("wxBufferedDC already initialised") );
+        wxASSERT_MSG( buffer.Ok(),
+                      wxT("invalid bitmap") );
+        m_mainDc = dc;
+        m_buffer = &buffer;
+        m_style = style;

         UseBuffer();
     }
 
         UseBuffer();
     }
 

-    void Init(wxDC *dc, const wxSize &area)
+    void Init(wxWindow* win,
+              wxDC *dc,
+              const wxSize &area = wxDefaultSize,
+              int style = wxBUFFER_CLIENT_AREA)
+    {
+        wxASSERT_MSG( m_mainDc == NULL,
+                      wxT("wxBufferedDC already initialised") );
+
+        m_mainDc = dc;
+        m_style = style;
+
+#if wxTEST_MEMORYDCDELEGATION
+        if ( 0 )
+#elif wxTEST_PAINTDCDELEGATION
+        if ( 1 )
+#else
+        if ( win && win->IsDoubleBuffered() )
+#endif
+        {
+            AttachDC(dc);
+            m_buffer = NULL;
+        }
+        else
+        {
+            PrepareBuffer(win, area);
+            UseBuffer();
+        }
+    }
+
+    void Init(wxDC *dc, const wxSize &area = wxDefaultSize, int style = wxBUFFER_CLIENT_AREA)

     {
     {

-        Init(dc, wxBitmap(area.GetWidth(), area.GetHeight()));
+        Init(NULL, dc, area, style);

     }
 
     // Blits the buffer to the dc, and detaches the dc from the buffer (so it
     }
 
     // Blits the buffer to the dc, and detaches the dc from the buffer (so it


@@ -76,37 +160,439 @@ public:
     // Usually called in the dtor or by the dtor of derived classes if the
     // BufferedDC must blit before the derived class (which may own the dc it's
     // blitting to) is destroyed.
     // Usually called in the dtor or by the dtor of derived classes if the
     // BufferedDC must blit before the derived class (which may own the dc it's
     // blitting to) is destroyed.

-    void UnMask()
-    {
-        wxASSERT_MSG( m_dc != 0,
-                      _T("No underlying DC associated with wxBufferedDC (anymore)") );
+    void UnMask();

 
 

-        m_dc->Blit( 0, 0,
-                    m_buffer.GetWidth(), m_buffer.GetHeight(), this,
-                    0, 0 );
-        m_dc = NULL;
-    }
+    // Set and get the style
+    void SetStyle(int style) { m_style = style; }
+    int GetStyle() const { return m_style; }

 
 private:
 
 private:

-    // check that the bitmap is valid and use it
-    void UseBuffer()
-    {
-        wxASSERT_MSG( m_buffer.Ok(), _T("invalid bitmap in wxBufferedDC") );
+    // Prepares wxMemoryDC.
+    void UseBuffer();

 
 

-        SelectObject(m_buffer);
-    }
+    // Allocate m_buffer, if necessary.
+    void PrepareBuffer(wxWindow* win, const wxSize& area);
+
+    // DC to which calls are delegated.
+    wxDC*           m_targetDc;

 
 

-    // the underlying DC to which we copy everything drawn on this one in
-    // UnMask()
+    // This the underlying DC to which we copy everything drawn on
+    // this one in UnMask().

     //
     // NB: Without the existence of a wxNullDC, this must be a pointer, else it
     //     could probably be a reference.
     //
     // NB: Without the existence of a wxNullDC, this must be a pointer, else it
     //     could probably be a reference.

-    wxDC *m_dc;
+    wxDC*           m_mainDc;

 
     // the buffer (selected in this DC)
 
     // the buffer (selected in this DC)

-    wxBitmap m_buffer;
+    const wxBitmap* m_buffer;
+
+    // the buffering style
+    int             m_style;

 
     DECLARE_NO_COPY_CLASS(wxBufferedDC)
 
     DECLARE_NO_COPY_CLASS(wxBufferedDC)

+public:
+    //
+    // BEGIN DC-DELEGATION IMPLEMENTATION
+    //
+
+    wxDC& GetAttachedDC()
+    {
+        return *m_targetDc;
+    }
+
+    // Use this to set the DC which receives delegated calls.
+    void AttachDC(wxDC* dc)
+    {
+        m_targetDc = dc;
+    #ifdef __WXMSW__
+        SetHDC( dc ? dc->GetHDC() : NULL );
+    #endif
+    }
+
+    // Sets DC to NULL
+    wxDC* DetachDC()
+    {
+        wxDC* retDc = m_targetDc;
+        AttachDC(NULL);
+        return retDc;
+    }
+
+#ifdef __WXGTK__
+    virtual GdkWindow* GetGDKWindow() const
+    {
+        return m_targetDc->GetGDKWindow();
+    }
+#endif
+
+    bool Blit(wxCoord xdest, wxCoord ydest, wxCoord width, wxCoord height,
+              wxDC *source, wxCoord xsrc, wxCoord ysrc,
+              int rop = wxCOPY, bool useMask = false, wxCoord xsrcMask = wxDefaultCoord, wxCoord ysrcMask = wxDefaultCoord)
+        { return m_targetDc->Blit(xdest, ydest, width, height,
+                                  source, xsrc, ysrc, rop,
+                                  useMask, xsrcMask, ysrcMask); }
+    bool Blit(const wxPoint& destPt, const wxSize& sz,
+              wxDC *source, const wxPoint& srcPt,
+              int rop = wxCOPY, bool useMask = false, const wxPoint& srcPtMask = wxDefaultPosition)
+        { return m_targetDc->Blit(destPt, sz, source, srcPt,
+                                  rop, useMask, srcPtMask); }
+    virtual void CalcBoundingBox(wxCoord x, wxCoord y) { m_targetDc->CalcBoundingBox(x, y); }
+#if defined(__WXWINCE__)
+    void CalculateEllipticPoints( wxList* points,
+                                  wxCoord xStart, wxCoord yStart,
+                                  wxCoord w, wxCoord h,
+                                  double sa, double ea )
+        { m_targetDc->CalculateEllipticPoints(points, xStart, yStart, w,
+                                              h, sa, ea); }
+#endif // defined(__WXWINCE__)
+    virtual bool CanDrawBitmap() const { return m_targetDc->CanDrawBitmap(); }
+    virtual bool CanGetTextExtent() const { return m_targetDc->CanGetTextExtent(); }
+    virtual void Clear() { m_targetDc->Clear(); }
+    virtual void ComputeScaleAndOrigin() { m_targetDc->ComputeScaleAndOrigin(); }
+    void CrossHair(wxCoord x, wxCoord y) { m_targetDc->CrossHair(x, y); }
+    void CrossHair(const wxPoint& pt) { m_targetDc->CrossHair(pt); }
+    virtual void DestroyClippingRegion() { m_targetDc->DestroyClippingRegion(); }
+    wxCoord DeviceToLogicalX(wxCoord x) const { return m_targetDc->DeviceToLogicalX(x); }
+    wxCoord DeviceToLogicalXRel(wxCoord x) const { return m_targetDc->DeviceToLogicalXRel(x); }
+    wxCoord DeviceToLogicalY(wxCoord y) const { return m_targetDc->DeviceToLogicalY(y); }
+    wxCoord DeviceToLogicalYRel(wxCoord y) const { return m_targetDc->DeviceToLogicalYRel(y); }
+#if defined(__WXWINCE__)
+    virtual void DoDrawEllipticArcRot( wxCoord x, wxCoord y,
+                                       wxCoord w, wxCoord h,
+                                       double sa = 0, double ea = 0, double angle = 0 )
+        { m_targetDc->DoDrawEllipticArcRot(x, y, w, h,
+                                           sa, ea, angle); }
+#endif // defined(__WXWINCE__)
+    void DrawArc(wxCoord x1, wxCoord y1, wxCoord x2, wxCoord y2,
+                 wxCoord xc, wxCoord yc)
+        { m_targetDc->DrawArc(x1, y1, x2, y2,
+                              xc, yc); }
+    void DrawArc(const wxPoint& pt1, const wxPoint& pt2, const wxPoint& centre)
+        { m_targetDc->DrawArc(pt1, pt2, centre); }
+    void DrawBitmap(const wxBitmap &bmp, wxCoord x, wxCoord y,
+                    bool useMask = false)
+        { m_targetDc->DrawBitmap(bmp, x, y, useMask); }
+    void DrawBitmap(const wxBitmap &bmp, const wxPoint& pt,
+                    bool useMask = false)
+        { m_targetDc->DrawBitmap(bmp, pt, useMask); }
+    void DrawCheckMark(wxCoord x, wxCoord y,
+                       wxCoord width, wxCoord height)
+        { m_targetDc->DrawCheckMark(x, y, width, height); }
+    void DrawCheckMark(const wxRect& rect) { m_targetDc->DrawCheckMark(rect); }
+    void DrawCircle(wxCoord x, wxCoord y, wxCoord radius) { m_targetDc->DrawCircle(x, y, radius); }
+    void DrawCircle(const wxPoint& pt, wxCoord radius) { m_targetDc->DrawCircle(pt, radius); }
+    void DrawEllipse(wxCoord x, wxCoord y, wxCoord width, wxCoord height)
+        { m_targetDc->DrawEllipse(x, y, width, height); }
+    void DrawEllipse(const wxPoint& pt, const wxSize& sz) { m_targetDc->DrawEllipse(pt, sz); }
+    void DrawEllipse(const wxRect& rect) { m_targetDc->DrawEllipse(rect); }
+    void DrawEllipticArc(wxCoord x, wxCoord y, wxCoord w, wxCoord h,
+                         double sa, double ea)
+        { m_targetDc->DrawEllipticArc(x, y, w, h,
+                                      sa, ea); }
+    void DrawEllipticArc(const wxPoint& pt, const wxSize& sz,
+                         double sa, double ea)
+        { m_targetDc->DrawEllipticArc(pt, sz, sa, ea); }
+#if defined(__WXWINCE__)
+    void DrawEllipticArcRot( wxCoord x, wxCoord y,
+                             wxCoord width, wxCoord height,
+                             double sa = 0, double ea = 0, double angle = 0 )
+        { m_targetDc->DrawEllipticArcRot(x, y, width, height,
+                                         sa, ea, angle); }
+    void DrawEllipticArcRot( const wxPoint& pt,
+                             const wxSize& sz,
+                             double sa = 0, double ea = 0, double angle = 0 )
+        { m_targetDc->DrawEllipticArcRot(pt, sz, sa, ea,
+                                         angle); }
+    void DrawEllipticArcRot( const wxRect& rect,
+                             double sa = 0, double ea = 0, double angle = 0 )
+        { m_targetDc->DrawEllipticArcRot(rect, sa, ea, angle); }
+#endif // defined(__WXWINCE__)
+    void DrawIcon(const wxIcon& icon, wxCoord x, wxCoord y) { m_targetDc->DrawIcon(icon, x, y); }
+    void DrawIcon(const wxIcon& icon, const wxPoint& pt) { m_targetDc->DrawIcon(icon, pt); }
+    virtual void DrawLabel(const wxString& text,
+                           const wxBitmap& image,
+                           const wxRect& rect,
+                           int alignment = wxALIGN_LEFT | wxALIGN_TOP,
+                           int indexAccel = -1,
+                           wxRect *rectBounding = NULL)
+        { m_targetDc->DrawLabel(text, image, rect, alignment,
+                                indexAccel, rectBounding); }
+    void DrawLabel(const wxString& text, const wxRect& rect,
+                   int alignment = wxALIGN_LEFT | wxALIGN_TOP,
+                   int indexAccel = -1)
+        { m_targetDc->DrawLabel(text, rect, alignment, indexAccel); }
+    void DrawLine(wxCoord x1, wxCoord y1, wxCoord x2, wxCoord y2)
+        { m_targetDc->DrawLine(x1, y1, x2, y2); }
+    void DrawLine(const wxPoint& pt1, const wxPoint& pt2) { m_targetDc->DrawLine(pt1, pt2); }
+    void DrawLines(int n, wxPoint points[],
+                   wxCoord xoffset = 0, wxCoord yoffset = 0)
+        { m_targetDc->DrawLines(n, points, xoffset, yoffset); }
+    void DrawLines(const wxList *list,
+                   wxCoord xoffset = 0, wxCoord yoffset = 0)
+        { m_targetDc->DrawLines(list, xoffset, yoffset); }
+    virtual void DrawObject(wxDrawObject* drawobject) { m_targetDc->DrawObject(drawobject); }
+    void DrawPoint(wxCoord x, wxCoord y) { m_targetDc->DrawPoint(x, y); }
+    void DrawPoint(const wxPoint& pt) { m_targetDc->DrawPoint(pt); }
+    void DrawPolyPolygon(int n, int count[], wxPoint points[],
+                         wxCoord xoffset = 0, wxCoord yoffset = 0,
+                         int fillStyle = wxODDEVEN_RULE)
+        { m_targetDc->DrawPolyPolygon(n, count, points, xoffset,
+                                      yoffset, fillStyle); }
+    void DrawPolygon(int n, wxPoint points[],
+                     wxCoord xoffset = 0, wxCoord yoffset = 0,
+                     int fillStyle = wxODDEVEN_RULE)
+        { m_targetDc->DrawPolygon(n, points, xoffset, yoffset,
+                                  fillStyle); }
+    void DrawPolygon(const wxList *list,
+                     wxCoord xoffset = 0, wxCoord yoffset = 0,
+                     int fillStyle = wxODDEVEN_RULE)
+        { m_targetDc->DrawPolygon(list, xoffset, yoffset, fillStyle); }
+    void DrawRectangle(wxCoord x, wxCoord y, wxCoord width, wxCoord height)
+        { m_targetDc->DrawRectangle(x, y, width, height); }
+    void DrawRectangle(const wxPoint& pt, const wxSize& sz) { m_targetDc->DrawRectangle(pt, sz); }
+    void DrawRectangle(const wxRect& rect) { m_targetDc->DrawRectangle(rect); }
+    void DrawRotatedText(const wxString& text, wxCoord x, wxCoord y, double angle)
+        { m_targetDc->DrawRotatedText(text, x, y, angle); }
+    void DrawRotatedText(const wxString& text, const wxPoint& pt, double angle)
+        { m_targetDc->DrawRotatedText(text, pt, angle); }
+    void DrawRoundedRectangle(wxCoord x, wxCoord y, wxCoord width, wxCoord height,
+                              double radius)
+        { m_targetDc->DrawRoundedRectangle(x, y, width, height,
+                                           radius); }
+    void DrawRoundedRectangle(const wxPoint& pt, const wxSize& sz,
+                             double radius)
+        { m_targetDc->DrawRoundedRectangle(pt, sz, radius); }
+    void DrawRoundedRectangle(const wxRect& r, double radius)
+        { m_targetDc->DrawRoundedRectangle(r, radius); }
+#if wxUSE_SPLINES
+    void DrawSpline(wxCoord x1, wxCoord y1,
+                    wxCoord x2, wxCoord y2,
+                    wxCoord x3, wxCoord y3)
+        { m_targetDc->DrawSpline(x1, y1, x2, y2,
+                                 x3, y3); }
+    void DrawSpline(int n, wxPoint points[]) { m_targetDc->DrawSpline(n, points); }
+    void DrawSpline(wxList *points) { m_targetDc->DrawSpline(points); }
+#endif // wxUSE_SPLINES
+    void DrawText(const wxString& text, wxCoord x, wxCoord y)
+        { m_targetDc->DrawText(text, x, y); }
+    void DrawText(const wxString& text, const wxPoint& pt) { m_targetDc->DrawText(text, pt); }
+    virtual void EndDoc() { m_targetDc->EndDoc(); }
+    virtual void EndPage() { m_targetDc->EndPage(); }
+    bool FloodFill(wxCoord x, wxCoord y, const wxColour& col,
+                   int style = wxFLOOD_SURFACE)
+        { return m_targetDc->FloodFill(x, y, col, style); }
+    bool FloodFill(const wxPoint& pt, const wxColour& col,
+                   int style = wxFLOOD_SURFACE)
+        { return m_targetDc->FloodFill(pt, col, style); }
+    virtual const wxBrush&  GetBackground() const { return m_targetDc->GetBackground(); }
+    virtual int GetBackgroundMode() const { return m_targetDc->GetBackgroundMode(); }
+    virtual const wxBrush&  GetBrush() const { return m_targetDc->GetBrush(); }
+    virtual wxCoord GetCharHeight() const { return m_targetDc->GetCharHeight(); }
+    virtual wxCoord GetCharWidth() const { return m_targetDc->GetCharWidth(); }
+    void GetClippingBox(wxCoord *x, wxCoord *y, wxCoord *w, wxCoord *h) const
+        { m_targetDc->GetClippingBox(x, y, w, h); }
+    void GetClippingBox(wxRect& rect) const { m_targetDc->GetClippingBox(rect); }
+    void GetClippingBox(long *x, long *y, long *w, long *h) const
+        { m_targetDc->GetClippingBox(x, y, w, h); }
+    virtual int GetDepth() const { return m_targetDc->GetDepth(); }
+    void GetDeviceOrigin(wxCoord *x, wxCoord *y) const { m_targetDc->GetDeviceOrigin(x, y); }
+    wxPoint GetDeviceOrigin() const { return m_targetDc->GetDeviceOrigin(); }
+    void GetDeviceOrigin(long *x, long *y) const { m_targetDc->GetDeviceOrigin(x, y); }
+    virtual const wxFont&   GetFont() const { return m_targetDc->GetFont(); }
+    virtual int GetLogicalFunction() const { return m_targetDc->GetLogicalFunction(); }
+    void GetLogicalOrigin(wxCoord *x, wxCoord *y) const { m_targetDc->GetLogicalOrigin(x, y); }
+    wxPoint GetLogicalOrigin() const { return m_targetDc->GetLogicalOrigin(); }
+    void GetLogicalOrigin(long *x, long *y) const { m_targetDc->GetLogicalOrigin(x, y); }
+    virtual void GetLogicalScale(double *x, double *y) { m_targetDc->GetLogicalScale(x, y); }
+    virtual int GetMapMode() const { return m_targetDc->GetMapMode(); }
+    virtual void GetMultiLineTextExtent(const wxString& text,
+                                        wxCoord *width,
+                                        wxCoord *height,
+                                        wxCoord *heightLine = NULL,
+                                        wxFont *font = NULL)
+        { m_targetDc->GetMultiLineTextExtent(text, width, height, heightLine,
+                                             font); }
+#if WXWIN_COMPATIBILITY_2_4
+    virtual bool GetOptimization() { return m_targetDc->GetOptimization(); }
+#endif // WXWIN_COMPATIBILITY_2_4
+    virtual wxSize GetPPI() const { return m_targetDc->GetPPI(); }
+    bool GetPartialTextExtents(const wxString& text, wxArrayInt& widths) const
+        { return m_targetDc->GetPartialTextExtents(text, widths); }
+    virtual const wxPen&    GetPen() const { return m_targetDc->GetPen(); }
+    bool GetPixel(wxCoord x, wxCoord y, wxColour *col) const
+        { return m_targetDc->GetPixel(x, y, col); }
+    bool GetPixel(const wxPoint& pt, wxColour *col) const { return m_targetDc->GetPixel(pt, col); }
+    void GetSize(int *width, int *height) const { m_targetDc->GetSize(width, height); }
+    wxSize GetSize() const { return m_targetDc->GetSize(); }
+    void GetSizeMM(int* width, int* height) const { m_targetDc->GetSizeMM(width, height); }
+    wxSize GetSizeMM() const { return m_targetDc->GetSizeMM(); }
+    virtual const wxColour& GetTextBackground() const { return m_targetDc->GetTextBackground(); }
+    void GetTextExtent(const wxString& string,
+                       wxCoord *x, wxCoord *y,
+                       wxCoord *descent = NULL,
+                       wxCoord *externalLeading = NULL,
+                       wxFont *theFont = NULL) const
+        { m_targetDc->GetTextExtent(string, x, y, descent,
+                                    externalLeading, theFont); }
+    void GetTextExtent(const wxString& string,
+                       long *x, long *y,
+                       long *descent = NULL,
+                       long *externalLeading = NULL,
+                       wxFont *theFont = NULL) const
+        { m_targetDc->GetTextExtent(string, x, y, descent,
+                                    externalLeading, theFont); }
+    virtual const wxColour& GetTextForeground() const { return m_targetDc->GetTextForeground(); }
+    virtual void GetUserScale(double *x, double *y) const { m_targetDc->GetUserScale(x, y); }
+    void GradientFillConcentric(const wxRect& rect,
+                                const wxColour& initialColour,
+                                const wxColour& destColour)
+        { m_targetDc->GradientFillConcentric(rect, initialColour, destColour); }
+    void GradientFillConcentric(const wxRect& rect,
+                                const wxColour& initialColour,
+                                const wxColour& destColour,
+                                const wxPoint& circleCenter)
+        { m_targetDc->GradientFillConcentric(rect, initialColour, destColour, circleCenter); }
+    void GradientFillLinear(const wxRect& rect,
+                            const wxColour& initialColour,
+                            const wxColour& destColour,
+                            wxDirection nDirection = wxEAST)
+        { m_targetDc->GradientFillLinear(rect, initialColour, destColour, nDirection); }
+    wxCoord LogicalToDeviceX(wxCoord x) const { return m_targetDc->LogicalToDeviceX(x); }
+    wxCoord LogicalToDeviceXRel(wxCoord x) const { return m_targetDc->LogicalToDeviceXRel(x); }
+    wxCoord LogicalToDeviceY(wxCoord y) const { return m_targetDc->LogicalToDeviceY(y); }
+    wxCoord LogicalToDeviceYRel(wxCoord y) const { return m_targetDc->LogicalToDeviceYRel(y); }
+    wxCoord MaxX() const { return m_targetDc->MaxX(); }
+    wxCoord MaxY() const { return m_targetDc->MaxY(); }
+    wxCoord MinX() const { return m_targetDc->MinX(); }
+    wxCoord MinY() const { return m_targetDc->MinY(); }
+    virtual bool Ok() const { return m_targetDc->Ok(); }
+    void ResetBoundingBox()
+        { m_targetDc->ResetBoundingBox(); }
+#if defined(__WXWINCE__)
+    void Rotate( wxList* points, double angle, wxPoint center = wxPoint(0,0) )
+        { m_targetDc->Rotate(points, angle, center, 0)); }
+#endif // defined(__WXWINCE__)
+    virtual void SetAxisOrientation(bool xLeftRight, bool yBottomUp)
+        { m_targetDc->SetAxisOrientation(xLeftRight, yBottomUp); }
+    virtual void SetBackground(const wxBrush& brush) { m_targetDc->SetBackground(brush); }
+    virtual void SetBackgroundMode(int mode) { m_targetDc->SetBackgroundMode(mode); }
+    virtual void SetBrush(const wxBrush& brush) { m_targetDc->SetBrush(brush); }
+    void SetClippingRegion(wxCoord x, wxCoord y, wxCoord width, wxCoord height)
+        { m_targetDc->SetClippingRegion(x, y, width, height); }
+    void SetClippingRegion(const wxPoint& pt, const wxSize& sz)
+        { m_targetDc->SetClippingRegion(pt, sz); }
+    void SetClippingRegion(const wxRect& rect) { m_targetDc->SetClippingRegion(rect); }
+    void SetClippingRegion(const wxRegion& region) { m_targetDc->SetClippingRegion(region); }
+    virtual void SetDeviceOrigin(wxCoord x, wxCoord y) { m_targetDc->SetDeviceOrigin(x, y); }
+    virtual void SetFont(const wxFont& font) { m_targetDc->SetFont(font); }
+    virtual void SetLogicalFunction(int function) { m_targetDc->SetLogicalFunction(function); }
+    virtual void SetLogicalOrigin(wxCoord x, wxCoord y) { m_targetDc->SetLogicalOrigin(x, y); }
+    virtual void SetLogicalScale(double x, double y) { m_targetDc->SetLogicalScale(x, y); }
+    virtual void SetMapMode(int mode) { m_targetDc->SetMapMode(mode); }
+#if WXWIN_COMPATIBILITY_2_4
+    virtual void SetOptimization(bool opt) { m_targetDc->SetOptimization(opt); }
+#endif // WXWIN_COMPATIBILITY_2_4
+#if wxUSE_PALETTE
+    virtual void SetPalette(const wxPalette& palette) { m_targetDc->SetPalette(palette); }
+#endif // wxUSE_PALETTE
+    virtual void SetPen(const wxPen& pen) { m_targetDc->SetPen(pen); }
+    virtual void SetTextBackground(const wxColour& colour) { m_targetDc->SetTextBackground(colour); }
+    virtual void SetTextForeground(const wxColour& colour) { m_targetDc->SetTextForeground(colour); }
+    virtual void SetUserScale(double x, double y) { m_targetDc->SetUserScale(x, y); }
+    virtual bool StartDoc(const wxString& message) { return m_targetDc->StartDoc(message); }
+    virtual void StartPage() { m_targetDc->StartPage(); }
+protected:
+    virtual bool DoBlit(wxCoord xdest, wxCoord ydest,
+                        wxCoord width, wxCoord height,
+                        wxDC *source, wxCoord xsrc, wxCoord ysrc,
+                        int rop = wxCOPY, bool useMask = false, wxCoord xsrcMask = wxDefaultCoord, wxCoord ysrcMask = wxDefaultCoord)
+        { return m_targetDc->Blit(xdest, ydest, width, height,
+                                  source, xsrc, ysrc, rop,
+                                  useMask, xsrcMask, ysrcMask); }
+    virtual void DoCrossHair(wxCoord x, wxCoord y) { m_targetDc->CrossHair(x, y); }
+    virtual void DoDrawArc(wxCoord x1, wxCoord y1,
+                           wxCoord x2, wxCoord y2,
+                           wxCoord xc, wxCoord yc)
+        { m_targetDc->DrawArc(x1, y1, x2, y2,
+                              xc, yc); }
+    virtual void DoDrawBitmap(const wxBitmap &bmp, wxCoord x, wxCoord y,
+                              bool useMask = false)
+        { m_targetDc->DrawBitmap(bmp, x, y, useMask); }
+    virtual void DoDrawCheckMark(wxCoord x, wxCoord y,
+                                 wxCoord width, wxCoord height)
+        { m_targetDc->DrawCheckMark(x, y, width, height); }
+    virtual void DoDrawEllipse(wxCoord x, wxCoord y,
+                               wxCoord width, wxCoord height)
+        { m_targetDc->DrawEllipse(x, y, width, height); }
+    virtual void DoDrawEllipticArc(wxCoord x, wxCoord y, wxCoord w, wxCoord h,
+                                   double sa, double ea)
+        { m_targetDc->DrawEllipticArc(x, y, w, h,
+                                      sa, ea); }
+    virtual void DoDrawIcon(const wxIcon& icon, wxCoord x, wxCoord y)
+        { m_targetDc->DrawIcon(icon, x, y); }
+    virtual void DoDrawLine(wxCoord x1, wxCoord y1, wxCoord x2, wxCoord y2)
+        { m_targetDc->DrawLine(x1, y1, x2, y2); }
+    virtual void DoDrawLines(int n, wxPoint points[],
+                             wxCoord xoffset, wxCoord yoffset)
+        { m_targetDc->DrawLines(n, points, xoffset, yoffset); }
+    virtual void DoDrawPoint(wxCoord x, wxCoord y) { m_targetDc->DrawPoint(x, y); }
+    virtual void DoDrawPolyPolygon(int n, int count[], wxPoint points[],
+                               wxCoord xoffset, wxCoord yoffset,
+                               int fillStyle)
+        { m_targetDc->DrawPolyPolygon(n, count, points, xoffset,
+                                      yoffset, fillStyle); }
+    virtual void DoDrawPolygon(int n, wxPoint points[],
+                               wxCoord xoffset, wxCoord yoffset,
+                               int fillStyle = wxODDEVEN_RULE)
+        { m_targetDc->DrawPolygon(n, points, xoffset, yoffset,
+                                  fillStyle); }
+    virtual void DoDrawRectangle(wxCoord x, wxCoord y, wxCoord width, wxCoord height)
+        { m_targetDc->DrawRectangle(x, y, width, height); }
+    virtual void DoDrawRotatedText(const wxString& text,
+                                   wxCoord x, wxCoord y, double angle)
+        { m_targetDc->DrawRotatedText(text, x, y, angle); }
+    virtual void DoDrawRoundedRectangle(wxCoord x, wxCoord y,
+                                        wxCoord width, wxCoord height,
+                                        double radius)
+        { m_targetDc->DrawRoundedRectangle(x, y, width, height,
+                                           radius); }
+#if wxUSE_SPLINES
+    virtual void DoDrawSpline(wxList *points) { m_targetDc->DrawSpline(points); }
+#endif // wxUSE_SPLINES
+    virtual void DoDrawText(const wxString& text, wxCoord x, wxCoord y)
+        { m_targetDc->DrawText(text, x, y); }
+    virtual bool DoFloodFill(wxCoord x, wxCoord y, const wxColour& col,
+                             int style = wxFLOOD_SURFACE)
+        { return m_targetDc->FloodFill(x, y, col, style); }
+    virtual void DoGetClippingBox(wxCoord *x, wxCoord *y,
+                                  wxCoord *w, wxCoord *h) const
+        { m_targetDc->GetClippingBox(x, y, w, h); }
+    virtual void DoGetDeviceOrigin(wxCoord *x, wxCoord *y) const
+        { m_targetDc->GetDeviceOrigin(x, y); }
+    virtual void DoGetLogicalOrigin(wxCoord *x, wxCoord *y) const
+        { m_targetDc->GetLogicalOrigin(x, y); }
+    virtual bool DoGetPartialTextExtents(const wxString& text, wxArrayInt& widths) const
+        { return m_targetDc->GetPartialTextExtents(text, widths); }
+    virtual bool DoGetPixel(wxCoord x, wxCoord y, wxColour *col) const
+        { return m_targetDc->GetPixel(x, y, col); }
+    virtual void DoGetSize(int *width, int *height) const { m_targetDc->GetSize(width, height); }
+    virtual void DoGetSizeMM(int* width, int* height) const { m_targetDc->GetSizeMM(width, height); }
+    virtual void DoGetTextExtent(const wxString& string,
+                                 wxCoord *x, wxCoord *y,
+                                 wxCoord *descent = NULL,
+                                 wxCoord *externalLeading = NULL,
+                                 wxFont *theFont = NULL) const
+        { m_targetDc->GetTextExtent(string, x, y, descent,
+                                    externalLeading, theFont); }
+    virtual void DoGradientFillLinear(const wxRect& rect,
+                                      const wxColour& initialColour,
+                                      const wxColour& destColour,
+                                      wxDirection nDirection = wxEAST)
+        { m_targetDc->GradientFillLinear(rect, initialColour, destColour, nDirection); }
+    virtual void DoSetClippingRegion(wxCoord x, wxCoord y,
+                                     wxCoord width, wxCoord height)
+        { m_targetDc->SetClippingRegion(x, y, width, height); }
+    virtual void DoSetClippingRegionAsRegion(const wxRegion& region)
+        { m_targetDc->SetClippingRegion(region); }

 };
 
 
 };
 
 


@@ -119,16 +605,29 @@ private:
 class wxBufferedPaintDC : public wxBufferedDC
 {
 public:
 class wxBufferedPaintDC : public wxBufferedDC
 {
 public:

-    // If no bitmap is supplied by the user, a temporary one wil; be created.
-    wxBufferedPaintDC(wxWindow *window, const wxBitmap& buffer = wxNullBitmap)
+    // If no bitmap is supplied by the user, a temporary one will be created.
+    wxBufferedPaintDC(wxWindow *window, const wxBitmap& buffer, int style = wxBUFFER_CLIENT_AREA)

         : m_paintdc(window)
     {
         : m_paintdc(window)
     {

-        window->PrepareDC( m_paintdc );
-        
+        // If we're buffering the virtual window, scale the paint DC as well
+        if (style & wxBUFFER_VIRTUAL_AREA)
+            window->PrepareDC( m_paintdc );
+

         if( buffer != wxNullBitmap )
         if( buffer != wxNullBitmap )

-            Init(&m_paintdc, buffer);
+            Init(&m_paintdc, buffer, style);

         else
         else

-            Init(&m_paintdc, window->GetClientSize());
+            Init(window, &m_paintdc, window->GetClientSize(), style);
+    }
+
+    // If no bitmap is supplied by the user, a temporary one will be created.
+    wxBufferedPaintDC(wxWindow *window, int style = wxBUFFER_CLIENT_AREA)
+        : m_paintdc(window)
+    {
+        // If we're using the virtual window, scale the paint DC as well
+        if (style & wxBUFFER_VIRTUAL_AREA)
+            window->PrepareDC( m_paintdc );
+
+        Init(window, &m_paintdc, window->GetClientSize(), style);

     }
 
     // default copy ctor ok.
     }
 
     // default copy ctor ok.


@@ -146,5 +645,54 @@ private:
     DECLARE_NO_COPY_CLASS(wxBufferedPaintDC)
 };
 
     DECLARE_NO_COPY_CLASS(wxBufferedPaintDC)
 };
 

-#endif  // _WX_DCBUFFER_H_

 
 

+
+//
+// wxAutoBufferedPaintDC is a wxPaintDC in toolkits which have double-
+// buffering by default. Otherwise it is a wxBufferedPaintDC. Thus,
+// you can only expect it work with a simple constructor that
+// accepts single wxWindow* argument.
+//
+#if wxALWAYS_NATIVE_DOUBLE_BUFFER
+    #define wxAutoBufferedPaintDCBase           wxPaintDC
+#else
+    #define wxAutoBufferedPaintDCBase           wxBufferedPaintDC
+#endif
+
+
+#ifdef __WXDEBUG__
+
+class wxAutoBufferedPaintDC : public wxAutoBufferedPaintDCBase
+{
+public:
+
+    wxAutoBufferedPaintDC(wxWindow* win)
+        : wxAutoBufferedPaintDCBase(win)
+    {
+        TestWinStyle(win);
+    }
+
+    virtual ~wxAutoBufferedPaintDC() { }
+
+private:
+
+    void TestWinStyle(wxWindow* win)
+    {
+        // Help the user to get the double-buffering working properly.
+        wxASSERT_MSG( win->GetBackgroundStyle() == wxBG_STYLE_CUSTOM,
+                      wxT("In constructor, you need to call GetBackgroundStyle(wxBG_STYLE_CUSTOM), ")
+                      wxT("and also, if needed, paint the background manually in the paint event handler."));
+    }
+
+    DECLARE_NO_COPY_CLASS(wxAutoBufferedPaintDC)
+};
+
+#else // !__WXDEBUG__
+
+// In release builds, just use typedef
+typedef wxAutoBufferedPaintDCBase wxAutoBufferedPaintDC;
+
+#endif
+
+
+#endif  // _WX_DCBUFFER_H_