X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/888dde65f43d5f57e8fb2028b27191cca1741403..3039ade95dbad1ee5a5ed03c25e3ed9241907850:/include/wx/dc.h diff --git a/include/wx/dc.h b/include/wx/dc.h index 6a86ae856d..ab19b30997 100644 --- a/include/wx/dc.h +++ b/include/wx/dc.h @@ -40,12 +40,13 @@ class WXDLLIMPEXP_FWD_CORE wxWindowDC; class WXDLLIMPEXP_FWD_CORE wxScreenDC; class WXDLLIMPEXP_FWD_CORE wxMemoryDC; class WXDLLIMPEXP_FWD_CORE wxPrinterDC; +class WXDLLIMPEXP_FWD_CORE wxPrintData; //----------------------------------------------------------------------------- // wxDrawObject helper class //----------------------------------------------------------------------------- -class WXDLLEXPORT wxDrawObject +class WXDLLIMPEXP_CORE wxDrawObject { public: @@ -114,21 +115,21 @@ class WXDLLIMPEXP_CORE wxDCFactory public: wxDCFactory() {} virtual ~wxDCFactory() {} - - virtual wxDCImpl* CreateWindowDC( wxWindowDC *owner ) = 0; + virtual wxDCImpl* CreateWindowDC( wxWindowDC *owner, wxWindow *window ) = 0; - virtual wxDCImpl* CreateClientDC( wxClientDC *owner ) = 0; virtual wxDCImpl* CreateClientDC( wxClientDC *owner, wxWindow *window ) = 0; - virtual wxDCImpl* CreatePaintDC( wxPaintDC *owner ) = 0; virtual wxDCImpl* CreatePaintDC( wxPaintDC *owner, wxWindow *window ) = 0; virtual wxDCImpl* CreateMemoryDC( wxMemoryDC *owner ) = 0; virtual wxDCImpl* CreateMemoryDC( wxMemoryDC *owner, wxBitmap &bitmap ) = 0; virtual wxDCImpl* CreateMemoryDC( wxMemoryDC *owner, wxDC *dc ) = 0; virtual wxDCImpl* CreateScreenDC( wxScreenDC *owner ) = 0; +#if wxUSE_PRINTING_ARCHITECTURE virtual wxDCImpl* CreatePrinterDC( wxPrinterDC *owner, const wxPrintData &data ) = 0; - - static void SetDCFactory( wxDCFactory *factory ); - static wxDCFactory *GetFactory(); +#endif + + static void Set(wxDCFactory *factory); + static wxDCFactory *Get(); + private: static wxDCFactory *m_factory; }; @@ -141,18 +142,17 @@ class WXDLLIMPEXP_CORE wxNativeDCFactory: public wxDCFactory { public: wxNativeDCFactory() {} - - virtual wxDCImpl* CreateWindowDC( wxWindowDC *owner ); + virtual wxDCImpl* CreateWindowDC( wxWindowDC *owner, wxWindow *window ); - virtual wxDCImpl* CreateClientDC( wxClientDC *owner ); virtual wxDCImpl* CreateClientDC( wxClientDC *owner, wxWindow *window ); - virtual wxDCImpl* CreatePaintDC( wxPaintDC *owner ); virtual wxDCImpl* CreatePaintDC( wxPaintDC *owner, wxWindow *window ); virtual wxDCImpl* CreateMemoryDC( wxMemoryDC *owner ); virtual wxDCImpl* CreateMemoryDC( wxMemoryDC *owner, wxBitmap &bitmap ); virtual wxDCImpl* CreateMemoryDC( wxMemoryDC *owner, wxDC *dc ); virtual wxDCImpl* CreateScreenDC( wxScreenDC *owner ); +#if wxUSE_PRINTING_ARCHITECTURE virtual wxDCImpl* CreatePrinterDC( wxPrinterDC *owner, const wxPrintData &data ); +#endif }; //----------------------------------------------------------------------------- @@ -163,12 +163,12 @@ class WXDLLIMPEXP_CORE wxDCImpl: public wxObject { public: wxDCImpl( wxDC *owner ); - ~wxDCImpl(); - + virtual ~wxDCImpl(); + wxDC *GetOwner() const { return m_owner; } - + wxWindow* GetWindow() const { return m_window; } - + virtual bool IsOk() const { return m_ok; } // query capabilities @@ -176,21 +176,40 @@ public: virtual bool CanDrawBitmap() const = 0; virtual bool CanGetTextExtent() const = 0; + // get Cairo context + virtual void* GetCairoContext() const + { + return NULL; + } + // query dimension, colour deps, resolution virtual void DoGetSize(int *width, int *height) const = 0; + void GetSize(int *width, int *height) const + { + DoGetSize(width, height); + return ; + } + + wxSize GetSize() const + { + int w, h; + DoGetSize(&w, &h); + return wxSize(w, h); + } + virtual void DoGetSizeMM(int* width, int* height) const = 0; - + virtual int GetDepth() const = 0; virtual wxSize GetPPI() const = 0; - + // Right-To-Left (RTL) modes - + virtual void SetLayoutDirection(wxLayoutDirection WXUNUSED(dir)) { } virtual wxLayoutDirection GetLayoutDirection() const { return wxLayout_Default; } - - // page and document - + + // page and document + virtual bool StartDoc(const wxString& WXUNUSED(message)) { return true; } virtual void EndDoc() { } @@ -232,38 +251,47 @@ public: wxCoord MaxX() const { return m_maxX; } wxCoord MinY() const { return m_minY; } wxCoord MaxY() const { return m_maxY; } - + // setters and getters virtual void SetFont(const wxFont& font) = 0; - virtual const wxFont& GetFont() const { return m_font; } - + virtual const wxFont& GetFont() const { return m_font; } + virtual void SetPen(const wxPen& pen) = 0; - virtual const wxPen& GetPen() const { return m_pen; } - + virtual const wxPen& GetPen() const { return m_pen; } + virtual void SetBrush(const wxBrush& brush) = 0; - virtual const wxBrush& GetBrush() const { return m_brush; } - + virtual const wxBrush& GetBrush() const { return m_brush; } + virtual void SetBackground(const wxBrush& brush) = 0; - virtual const wxBrush& GetBackground() const { return m_backgroundBrush; } - + virtual const wxBrush& GetBackground() const { return m_backgroundBrush; } + virtual void SetBackgroundMode(int mode) = 0; virtual int GetBackgroundMode() const { return m_backgroundMode; } virtual void SetTextForeground(const wxColour& colour) { m_textForegroundColour = colour; } - virtual const wxColour& GetTextForeground() const { return m_textForegroundColour; } - + virtual const wxColour& GetTextForeground() const + { return m_textForegroundColour; } + virtual void SetTextBackground(const wxColour& colour) { m_textBackgroundColour = colour; } - virtual const wxColour& GetTextBackground() const { return m_textBackgroundColour; } + virtual const wxColour& GetTextBackground() const + { return m_textBackgroundColour; } #if wxUSE_PALETTE virtual void SetPalette(const wxPalette& palette) = 0; #endif // wxUSE_PALETTE + // inherit the DC attributes (font and colours) from the given window + // + // this is called automatically when a window, client or paint DC is + // created + virtual void InheritAttributes(wxWindow *win); + + // logical functions - + virtual void SetLogicalFunction(int function) = 0; virtual int GetLogicalFunction() const { return m_logicalFunction; } @@ -282,16 +310,18 @@ public: wxCoord *heightLine = NULL, const wxFont *font = NULL) const; virtual bool DoGetPartialTextExtents(const wxString& text, wxArrayInt& widths) const; - + // clearing - + virtual void Clear() = 0; // clipping virtual void DoSetClippingRegion(wxCoord x, wxCoord y, wxCoord width, wxCoord height) = 0; - virtual void DoSetClippingRegionAsRegion(const wxRegion& region) = 0; + + // NB: this function works with device coordinates, not the logical ones! + virtual void DoSetDeviceClippingRegion(const wxRegion& region) = 0; virtual void DoGetClippingBox(wxCoord *x, wxCoord *y, wxCoord *w, wxCoord *h) const @@ -350,7 +380,7 @@ public: if ( x ) *x = m_deviceOriginX; if ( y ) *y = m_deviceOriginY; } - + virtual void SetDeviceLocalOrigin( wxCoord x, wxCoord y ); virtual void ComputeScaleAndOrigin(); @@ -431,7 +461,7 @@ public: wxCoord xoffset, wxCoord yoffset ) = 0; virtual void DrawLines(const wxPointList *list, wxCoord xoffset, wxCoord yoffset ); - + virtual void DoDrawPolygon(int n, wxPoint points[], wxCoord xoffset, wxCoord yoffset, int fillStyle = wxODDEVEN_RULE) = 0; @@ -444,35 +474,39 @@ public: #if wxUSE_SPLINES - virtual void DoDrawSpline(wxCoord x1, wxCoord y1, wxCoord x2, wxCoord y2, wxCoord x3, wxCoord y3); - virtual void DoDrawSpline(int n, wxPoint points[]); + void DrawSpline(wxCoord x1, wxCoord y1, + wxCoord x2, wxCoord y2, + wxCoord x3, wxCoord y3); + void DrawSpline(int n, wxPoint points[]); + void DrawSpline(const wxPointList *points) { DoDrawSpline(points); } + virtual void DoDrawSpline(const wxPointList *points); #endif - + // --------------------------------------------------------- // wxMemoryDC Impl API virtual void DoSelect(const wxBitmap& WXUNUSED(bmp)) { } - + virtual const wxBitmap& GetSelectedBitmap() const { return wxNullBitmap; } virtual wxBitmap& GetSelectedBitmap() { return wxNullBitmap; } - + // --------------------------------------------------------- // wxPrinterDC Impl API - virtual wxRect GetPaperRect() + virtual wxRect GetPaperRect() const { int w = 0; int h = 0; DoGetSize( &w, &h ); return wxRect(0,0,w,h); } - - virtual int GetResolution() + + virtual int GetResolution() const { return -1; } private: wxDC *m_owner; -protected: +protected: // unset clipping variables (after clipping region was destroyed) void ResetClipping() { @@ -481,9 +515,61 @@ protected: m_clipX1 = m_clipX2 = m_clipY1 = m_clipY2 = 0; } +#ifdef __WXWINCE__ + //! Generic method to draw ellipses, circles and arcs with current pen and brush. + /*! \param x Upper left corner of bounding box. + * \param y Upper left corner of bounding box. + * \param w Width of bounding box. + * \param h Height of bounding box. + * \param sa Starting angle of arc + * (counterclockwise, start at 3 o'clock, 360 is full circle). + * \param ea Ending angle of arc. + * \param angle Rotation angle, the Arc will be rotated after + * calculating begin and end. + */ + void DrawEllipticArcRot( wxCoord x, wxCoord y, + wxCoord width, wxCoord height, + double sa = 0, double ea = 0, double angle = 0 ) + { DoDrawEllipticArcRot( x, y, width, height, sa, ea, angle ); } + + void DrawEllipticArcRot( const wxPoint& pt, + const wxSize& sz, + double sa = 0, double ea = 0, double angle = 0 ) + { DoDrawEllipticArcRot( pt.x, pt.y, sz.x, sz.y, sa, ea, angle ); } + + void DrawEllipticArcRot( const wxRect& rect, + double sa = 0, double ea = 0, double angle = 0 ) + { DoDrawEllipticArcRot( rect.x, rect.y, rect.width, rect.height, sa, ea, angle ); } + + virtual void DoDrawEllipticArcRot( wxCoord x, wxCoord y, + wxCoord w, wxCoord h, + double sa = 0, double ea = 0, double angle = 0 ); + + //! Rotates points around center. + /*! This is a quite straight method, it calculates in pixels + * and so it produces rounding errors. + * \param points The points inside will be rotated. + * \param angle Rotating angle (counterclockwise, start at 3 o'clock, 360 is full circle). + * \param center Center of rotation. + */ + void Rotate( wxPointList* points, double angle, wxPoint center = wxPoint(0,0) ); + + // used by DrawEllipticArcRot + // Careful: wxList gets filled with points you have to delete later. + void CalculateEllipticPoints( wxPointList* points, + wxCoord xStart, wxCoord yStart, + wxCoord w, wxCoord h, + double sa, double ea ); +#endif // __WXWINCE__ + + // returns adjustment factor for converting wxFont "point size"; in wx + // it is point size on screen and needs to be multiplied by this value + // for rendering on higher-resolution DCs such as printer ones + static float GetFontPointSizeAdjustment(float dpi); + // window on which the DC draws or NULL wxWindow *m_window; - + // flags bool m_colour:1; bool m_ok:1; @@ -495,7 +581,7 @@ protected: wxCoord m_logicalOriginX, m_logicalOriginY; wxCoord m_deviceOriginX, m_deviceOriginY; // Usually 0,0, can be change by user - + wxCoord m_deviceLocalOriginX, m_deviceLocalOriginY; // non-zero if native top-left corner // is not at 0,0. This was the case under // Mac's GrafPorts (coordinate system @@ -507,11 +593,11 @@ protected: double m_scaleX, m_scaleY; // calculated from logical scale and user scale int m_signX, m_signY; // Used by SetAxisOrientation() to invert the axes - + // what is a mm on a screen you don't know the size of? double m_mm_to_pix_x, m_mm_to_pix_y; - + // bounding and clipping boxes wxCoord m_minX, m_minY, m_maxX, m_maxY; wxCoord m_clipX1, m_clipY1, m_clipX2, m_clipY2; @@ -537,41 +623,35 @@ private: }; -class WXDLLIMPEXP_CORE wxDC: public wxObject +class WXDLLIMPEXP_CORE wxDC : public wxObject { public: - wxDC() { m_pimpl = NULL; } - ~wxDC() { if (m_pimpl) delete m_pimpl; } + virtual ~wxDC() { delete m_pimpl; } wxDCImpl *GetImpl() { return m_pimpl; } const wxDCImpl *GetImpl() const { return m_pimpl; } - wxWindow *GetWindow() + wxWindow *GetWindow() const { return m_pimpl->GetWindow(); } - bool IsOk() const + bool IsOk() const { return m_pimpl && m_pimpl->IsOk(); } // query capabilities - bool CanDrawBitmap() const + bool CanDrawBitmap() const { return m_pimpl->CanDrawBitmap(); } bool CanGetTextExtent() const { return m_pimpl->CanGetTextExtent(); } - + // query dimension, colour deps, resolution void GetSize(int *width, int *height) const { m_pimpl->DoGetSize(width, height); } - wxSize GetSize() const - { - int w, h; - m_pimpl->DoGetSize(&w, &h); - return wxSize(w, h); - } + { return m_pimpl->GetSize(); } void GetSizeMM(int* width, int* height) const { m_pimpl->DoGetSizeMM(width, height); } @@ -581,24 +661,24 @@ public: m_pimpl->DoGetSizeMM(&w, &h); return wxSize(w, h); } - + int GetDepth() const { return m_pimpl->GetDepth(); } wxSize GetPPI() const { return m_pimpl->GetPPI(); } - virtual int GetResolution() + virtual int GetResolution() const { return m_pimpl->GetResolution(); } - + // Right-To-Left (RTL) modes - + void SetLayoutDirection(wxLayoutDirection dir) { m_pimpl->SetLayoutDirection( dir ); } wxLayoutDirection GetLayoutDirection() const { return m_pimpl->GetLayoutDirection(); } - - // page and document - + + // page and document + bool StartDoc(const wxString& message) { return m_pimpl->StartDoc(message); } void EndDoc() @@ -610,12 +690,12 @@ public: { m_pimpl->EndPage(); } // bounding box - + void CalcBoundingBox(wxCoord x, wxCoord y) { m_pimpl->CalcBoundingBox(x,y); } void ResetBoundingBox() { m_pimpl->ResetBoundingBox(); } - + wxCoord MinX() const { return m_pimpl->MinX(); } wxCoord MaxX() const @@ -624,29 +704,29 @@ public: { return m_pimpl->MinY(); } wxCoord MaxY() const { return m_pimpl->MaxY(); } - + // setters and getters void SetFont(const wxFont& font) { m_pimpl->SetFont( font ); } - const wxFont& GetFont() const + const wxFont& GetFont() const { return m_pimpl->GetFont(); } - + void SetPen(const wxPen& pen) { m_pimpl->SetPen( pen ); } - const wxPen& GetPen() const + const wxPen& GetPen() const { return m_pimpl->GetPen(); } - + void SetBrush(const wxBrush& brush) { m_pimpl->SetBrush( brush ); } const wxBrush& GetBrush() const { return m_pimpl->GetBrush(); } - + void SetBackground(const wxBrush& brush) { m_pimpl->SetBackground( brush ); } const wxBrush& GetBackground() const { return m_pimpl->GetBackground(); } - + void SetBackgroundMode(int mode) { m_pimpl->SetBackgroundMode( mode ); } int GetBackgroundMode() const @@ -656,31 +736,31 @@ public: { m_pimpl->SetTextForeground(colour); } const wxColour& GetTextForeground() const { return m_pimpl->GetTextForeground(); } - + void SetTextBackground(const wxColour& colour) { m_pimpl->SetTextBackground(colour); } - const wxColour& GetTextBackground() const + const wxColour& GetTextBackground() const { return m_pimpl->GetTextBackground(); } #if wxUSE_PALETTE void SetPalette(const wxPalette& palette) { m_pimpl->SetPalette(palette); } #endif // wxUSE_PALETTE - + // logical functions - + void SetLogicalFunction(int function) { m_pimpl->SetLogicalFunction(function); } int GetLogicalFunction() const { return m_pimpl->GetLogicalFunction(); } - + // text measurement wxCoord GetCharHeight() const { return m_pimpl->GetCharHeight(); } wxCoord GetCharWidth() const { return m_pimpl->GetCharWidth(); } - + void GetTextExtent(const wxString& string, wxCoord *x, wxCoord *y, wxCoord *descent = NULL, @@ -694,26 +774,26 @@ public: m_pimpl->DoGetTextExtent(string, &w, &h); return wxSize(w, h); } - + void GetMultiLineTextExtent(const wxString& string, wxCoord *width, wxCoord *height, wxCoord *heightLine = NULL, const wxFont *font = NULL) const { m_pimpl->GetMultiLineTextExtent( string, width, height, heightLine, font ); } - + wxSize GetMultiLineTextExtent(const wxString& string) const { wxCoord w, h; m_pimpl->GetMultiLineTextExtent(string, &w, &h); return wxSize(w, h); } - + bool GetPartialTextExtents(const wxString& text, wxArrayInt& widths) const { return m_pimpl->DoGetPartialTextExtents(text, widths); } - + // clearing - + void Clear() { m_pimpl->Clear(); } @@ -725,8 +805,21 @@ public: { m_pimpl->DoSetClippingRegion(pt.x, pt.y, sz.x, sz.y); } void SetClippingRegion(const wxRect& rect) { m_pimpl->DoSetClippingRegion(rect.x, rect.y, rect.width, rect.height); } - void SetClippingRegion(const wxRegion& region) - { m_pimpl->DoSetClippingRegionAsRegion(region); } + + // unlike the functions above, the coordinates of the region used in this + // one are in device coordinates, not the logical ones + void SetDeviceClippingRegion(const wxRegion& region) + { m_pimpl->DoSetDeviceClippingRegion(region); } + + // this function is deprecated because its name is confusing: you may + // expect it to work with logical coordinates but, in fact, it does exactly + // the same thing as SetDeviceClippingRegion() + // + // please review the code using it and either replace it with calls to + // SetDeviceClippingRegion() or correct it if it was [wrongly] passing + // logical coordinates to this function + wxDEPRECATED_INLINE(void SetClippingRegion(const wxRegion& region), + SetDeviceClippingRegion(region); ) void DestroyClippingRegion() { m_pimpl->DestroyClippingRegion(); } @@ -735,7 +828,7 @@ public: { m_pimpl->DoGetClippingBox(x, y, w, h); } void GetClippingBox(wxRect& rect) const { m_pimpl->DoGetClippingBox(&rect.x, &rect.y, &rect.width, &rect.height); } - + // coordinates conversions and transforms wxCoord DeviceToLogicalX(wxCoord x) const @@ -786,8 +879,8 @@ public: void SetAxisOrientation(bool xLeftRight, bool yBottomUp) { m_pimpl->SetAxisOrientation(xLeftRight, yBottomUp); } - - // mostly internal + + // mostly internal void SetDeviceLocalOrigin( wxCoord x, wxCoord y ) { m_pimpl->SetDeviceLocalOrigin( x, y ); } @@ -877,7 +970,7 @@ public: { m_pimpl->DoDrawLines(n, points, xoffset, yoffset); } void DrawLines(const wxPointList *list, wxCoord xoffset = 0, wxCoord yoffset = 0) - { m_pimpl->DrawLines( list, xoffset, yoffset ); } + { m_pimpl->DrawLines( list, xoffset, yoffset ); } #if WXWIN_COMPATIBILITY_2_8 wxDEPRECATED( void DrawLines(const wxList *list, wxCoord xoffset = 0, wxCoord yoffset = 0) ); @@ -982,12 +1075,12 @@ public: source, srcPt.x, srcPt.y, rop, useMask, srcPtMask.x, srcPtMask.y); } - bool StretchBlit(wxCoord dstX, wxCoord dstY, + bool StretchBlit(wxCoord dstX, wxCoord dstY, wxCoord dstWidth, wxCoord dstHeight, - wxDC *source, + wxDC *source, wxCoord srcX, wxCoord srcY, wxCoord srcWidth, wxCoord srcHeight, - int rop = wxCOPY, bool useMask = false, + int rop = wxCOPY, bool useMask = false, wxCoord srcMaskX = wxDefaultCoord, wxCoord srcMaskY = wxDefaultCoord) { return m_pimpl->DoStretchBlit(dstX, dstY, dstWidth, dstHeight, @@ -1010,11 +1103,11 @@ public: void DrawSpline(wxCoord x1, wxCoord y1, wxCoord x2, wxCoord y2, wxCoord x3, wxCoord y3) - { m_pimpl->DoDrawSpline(x1,y1,x2,y2,x3,y3); } + { m_pimpl->DrawSpline(x1,y1,x2,y2,x3,y3); } void DrawSpline(int n, wxPoint points[]) - { m_pimpl->DoDrawSpline(n,points); } - void DrawSpline(const wxPointList *points) - { m_pimpl->DoDrawSpline(points); } + { m_pimpl->DrawSpline(n,points); } + void DrawSpline(const wxPointList *points) + { m_pimpl->DrawSpline(points); } #endif // wxUSE_SPLINES @@ -1028,14 +1121,22 @@ public: wxDEPRECATED( void GetLogicalOrigin(long *x, long *y) const ); wxDEPRECATED( void GetDeviceOrigin(long *x, long *y) const ); wxDEPRECATED( void GetClippingBox(long *x, long *y, long *w, long *h) const ); + #endif // WXWIN_COMPATIBILITY_2_8 +#ifdef __WXMSW__ + WXHDC GetHDC() const; +#endif // __WXMSW__ protected: - wxDCImpl *m_pimpl; + // ctor takes ownership of the pointer + wxDC(wxDCImpl *pimpl) : m_pimpl(pimpl) { } + + wxDCImpl * const m_pimpl; private: DECLARE_ABSTRACT_CLASS(wxDC) + DECLARE_NO_COPY_CLASS(wxDC) }; // ---------------------------------------------------------------------------- @@ -1043,7 +1144,7 @@ private: // restore it automatically when the object goes out of scope // ---------------------------------------------------------------------------- -class WXDLLEXPORT wxDCTextColourChanger +class WXDLLIMPEXP_CORE wxDCTextColourChanger { public: wxDCTextColourChanger(wxDC& dc) : m_dc(dc), m_colFgOld() { } @@ -1079,7 +1180,7 @@ private: // restore it automatically when the object goes out of scope // ---------------------------------------------------------------------------- -class WXDLLEXPORT wxDCPenChanger +class WXDLLIMPEXP_CORE wxDCPenChanger { public: wxDCPenChanger(wxDC& dc, const wxPen& pen) : m_dc(dc), m_penOld(dc.GetPen()) @@ -1106,7 +1207,7 @@ private: // restore it automatically when the object goes out of scope // ---------------------------------------------------------------------------- -class WXDLLEXPORT wxDCBrushChanger +class WXDLLIMPEXP_CORE wxDCBrushChanger { public: wxDCBrushChanger(wxDC& dc, const wxBrush& brush) : m_dc(dc), m_brushOld(dc.GetBrush()) @@ -1133,11 +1234,11 @@ private: // destroys it in the dtor // ---------------------------------------------------------------------------- -class WXDLLEXPORT wxDCClipper +class WXDLLIMPEXP_CORE wxDCClipper { public: wxDCClipper(wxDC& dc, const wxRegion& r) : m_dc(dc) - { dc.SetClippingRegion(r); } + { dc.SetClippingRegion(r.GetBox()); } wxDCClipper(wxDC& dc, const wxRect& r) : m_dc(dc) { dc.SetClippingRegion(r.x, r.y, r.width, r.height); } wxDCClipper(wxDC& dc, wxCoord x, wxCoord y, wxCoord w, wxCoord h) : m_dc(dc) @@ -1151,4 +1252,32 @@ private: DECLARE_NO_COPY_CLASS(wxDCClipper) }; +// ---------------------------------------------------------------------------- +// helper class: you can use it to temporarily change the DC font and +// restore it automatically when the object goes out of scope +// ---------------------------------------------------------------------------- + +class WXDLLIMPEXP_CORE wxDCFontChanger +{ +public: + wxDCFontChanger(wxDC& dc, const wxFont& font) : m_dc(dc), m_fontOld(dc.GetFont()) + { + m_dc.SetFont(font); + } + + ~wxDCFontChanger() + { + if ( m_fontOld.Ok() ) + m_dc.SetFont(m_fontOld); + } + +private: + wxDC& m_dc; + + wxFont m_fontOld; + + DECLARE_NO_COPY_CLASS(wxDCFontChanger) +}; + + #endif // _WX_DC_H_BASE_