X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/1e6feb95a79834836e88143b15d9f424ebe79621..2bf8f4c0d57be03ee27a0f84d041ebcb99202497:/include/wx/dc.h diff --git a/include/wx/dc.h b/include/wx/dc.h index 7ca8eb3b76..dbe62c4d95 100644 --- a/include/wx/dc.h +++ b/include/wx/dc.h @@ -1,36 +1,36 @@ ///////////////////////////////////////////////////////////////////////////// -// Name: dc.h +// Name: wx/dc.h // Purpose: wxDC class // Author: Vadim Zeitlin // Modified by: // Created: 05/25/99 // RCS-ID: $Id$ -// Copyright: (c) wxWindows team +// Copyright: (c) wxWidgets team // Licence: wxWindows licence ///////////////////////////////////////////////////////////////////////////// #ifndef _WX_DC_H_BASE_ #define _WX_DC_H_BASE_ -#ifdef __GNUG__ - #pragma interface "dcbase.h" -#endif - // ---------------------------------------------------------------------------- // headers which we must include here // ---------------------------------------------------------------------------- #include "wx/object.h" // the base class +#include "wx/intl.h" // for wxLayoutDirection #include "wx/cursor.h" // we have member variables of these classes #include "wx/font.h" // so we can't do without them #include "wx/colour.h" +#include "wx/bitmap.h" // for wxNullBitmap #include "wx/brush.h" #include "wx/pen.h" #include "wx/palette.h" - #include "wx/list.h" // we use wxList in inline functions +#include "wx/dynarray.h" +#include "wx/math.h" +class WXDLLEXPORT wxDC; class WXDLLEXPORT wxDCBase; class WXDLLEXPORT wxDrawObject @@ -38,9 +38,9 @@ class WXDLLEXPORT wxDrawObject public: wxDrawObject() - { - ResetBoundingBox(); - } + : m_isBBoxValid(false) + , m_minX(0), m_minY(0), m_maxX(0), m_maxY(0) + { } virtual ~wxDrawObject() { } @@ -57,7 +57,7 @@ public: } else { - m_isBBoxValid = TRUE; + m_isBBoxValid = true; m_minX = x; m_minY = y; @@ -68,7 +68,7 @@ public: void ResetBoundingBox() { - m_isBBoxValid = FALSE; + m_isBBoxValid = false; m_minX = m_maxX = m_minY = m_maxY = 0; } @@ -94,8 +94,6 @@ protected: // global variables // --------------------------------------------------------------------------- -WXDLLEXPORT_DATA(extern int) wxPageNumber; - // --------------------------------------------------------------------------- // wxDC is the device context - object on which any drawing is done // --------------------------------------------------------------------------- @@ -104,39 +102,38 @@ class WXDLLEXPORT wxDCBase : public wxObject { public: wxDCBase() + : m_colour(wxColourDisplay()) + , m_ok(true) + , m_clipping(false) + , m_isInteractive(0) + , m_isBBoxValid(false) + , m_logicalOriginX(0), m_logicalOriginY(0) + , m_deviceOriginX(0), m_deviceOriginY(0) + , m_logicalScaleX(1.0), m_logicalScaleY(1.0) + , m_userScaleX(1.0), m_userScaleY(1.0) + , m_scaleX(1.0), m_scaleY(1.0) + , m_signX(1), m_signY(1) + , m_minX(0), m_minY(0), m_maxX(0), m_maxY(0) + , m_clipX1(0), m_clipY1(0), m_clipX2(0), m_clipY2(0) + , m_logicalFunction(wxCOPY) + , m_backgroundMode(wxTRANSPARENT) + , m_mappingMode(wxMM_TEXT) + , m_pen() + , m_brush() + , m_backgroundBrush(*wxTRANSPARENT_BRUSH) + , m_textForegroundColour(*wxBLACK) + , m_textBackgroundColour(*wxWHITE) + , m_font() +#if wxUSE_PALETTE + , m_palette() + , m_hasCustomPalette(false) +#endif // wxUSE_PALETTE { - m_clipping = FALSE; - m_ok = TRUE; - ResetBoundingBox(); - - m_signX = m_signY = 1; - - m_logicalOriginX = m_logicalOriginY = - m_deviceOriginX = m_deviceOriginY = 0; - - m_logicalScaleX = m_logicalScaleY = - m_userScaleX = m_userScaleY = - m_scaleX = m_scaleY = 1.0; - - m_logicalFunction = wxCOPY; - - m_backgroundMode = wxTRANSPARENT; - - m_mappingMode = wxMM_TEXT; - - m_backgroundBrush = *wxTRANSPARENT_BRUSH; - - m_textForegroundColour = *wxBLACK; - m_textBackgroundColour = *wxWHITE; - - m_colour = wxColourDisplay(); + ResetClipping(); } - ~wxDCBase() { } - - virtual void BeginDrawing() { } - virtual void EndDrawing() { } + virtual ~wxDCBase() { } // graphic primitives // ------------------ @@ -148,12 +145,34 @@ public: CalcBoundingBox(drawobject->MaxX(),drawobject->MaxY()); } - void FloodFill(wxCoord x, wxCoord y, const wxColour& col, + bool FloodFill(wxCoord x, wxCoord y, const wxColour& col, int style = wxFLOOD_SURFACE) - { DoFloodFill(x, y, col, style); } - void FloodFill(const wxPoint& pt, const wxColour& col, + { return DoFloodFill(x, y, col, style); } + bool FloodFill(const wxPoint& pt, const wxColour& col, int style = wxFLOOD_SURFACE) - { DoFloodFill(pt.x, pt.y, col, style); } + { return DoFloodFill(pt.x, pt.y, col, style); } + + // fill the area specified by rect with a radial gradient, starting from + // initialColour in the centre of the cercle and fading to destColour. + void GradientFillConcentric(const wxRect& rect, + const wxColour& initialColour, + const wxColour& destColour) + { GradientFillConcentric(rect, initialColour, destColour, + wxPoint(rect.GetWidth() / 2, + rect.GetHeight() / 2)); } + + void GradientFillConcentric(const wxRect& rect, + const wxColour& initialColour, + const wxColour& destColour, + const wxPoint& circleCenter) + { DoGradientFillConcentric(rect, initialColour, destColour, circleCenter); } + + // fill the area specified by rect with a linear gradient + void GradientFillLinear(const wxRect& rect, + const wxColour& initialColour, + const wxColour& destColour, + wxDirection nDirection = wxEAST) + { DoGradientFillLinear(rect, initialColour, destColour, nDirection); } bool GetPixel(wxCoord x, wxCoord y, wxColour *col) const { return DoGetPixel(x, y, col); } @@ -209,6 +228,11 @@ public: wxCoord xoffset = 0, wxCoord yoffset = 0, int fillStyle = wxODDEVEN_RULE); + void DrawPolyPolygon(int n, int count[], wxPoint points[], + wxCoord xoffset = 0, wxCoord yoffset = 0, + int fillStyle = wxODDEVEN_RULE) + { DoDrawPolyPolygon(n, count, points, xoffset, yoffset, fillStyle); } + void DrawRectangle(wxCoord x, wxCoord y, wxCoord width, wxCoord height) { DoDrawRectangle(x, y, width, height); } void DrawRectangle(const wxPoint& pt, const wxSize& sz) @@ -227,6 +251,9 @@ public: void DrawCircle(wxCoord x, wxCoord y, wxCoord radius) { DoDrawEllipse(x - radius, y - radius, 2*radius, 2*radius); } + void DrawCircle(const wxPoint& pt, wxCoord radius) + { DrawCircle(pt.x, pt.y, radius); } + void DrawEllipse(wxCoord x, wxCoord y, wxCoord width, wxCoord height) { DoDrawEllipse(x, y, width, height); } void DrawEllipse(const wxPoint& pt, const wxSize& sz) @@ -240,10 +267,10 @@ public: { DoDrawIcon(icon, pt.x, pt.y); } void DrawBitmap(const wxBitmap &bmp, wxCoord x, wxCoord y, - bool useMask = FALSE) + bool useMask = false) { DoDrawBitmap(bmp, x, y, useMask); } void DrawBitmap(const wxBitmap &bmp, const wxPoint& pt, - bool useMask = FALSE) + bool useMask = false) { DoDrawBitmap(bmp, pt.x, pt.y, useMask); } void DrawText(const wxString& text, wxCoord x, wxCoord y) @@ -274,17 +301,22 @@ public: bool Blit(wxCoord xdest, wxCoord ydest, wxCoord width, wxCoord height, wxDC *source, wxCoord xsrc, wxCoord ysrc, - int rop = wxCOPY, bool useMask = FALSE) + int rop = wxCOPY, bool useMask = false, wxCoord xsrcMask = wxDefaultCoord, wxCoord ysrcMask = wxDefaultCoord) { return DoBlit(xdest, ydest, width, height, - source, xsrc, ysrc, rop, useMask); + 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) + int rop = wxCOPY, bool useMask = false, const wxPoint& srcPtMask = wxDefaultPosition) { return DoBlit(destPt.x, destPt.y, sz.x, sz.y, - source, srcPt.x, srcPt.y, rop, useMask); + source, srcPt.x, srcPt.y, rop, useMask, srcPtMask.x, srcPtMask.y); + } + + wxBitmap GetAsBitmap(const wxRect *subrect = (const wxRect *) NULL) const + { + return DoGetAsBitmap(subrect); } #if wxUSE_SPLINES @@ -297,17 +329,71 @@ public: void DrawSpline(wxList *points) { DoDrawSpline(points); } #endif // wxUSE_SPLINES + // Eventually we will have wxUSE_GENERIC_DRAWELLIPSE +#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( wxList* points, double angle, wxPoint center = wxPoint(0,0) ); + + // used by DrawEllipticArcRot + // Careful: wxList gets filled with points you have to delete later. + void CalculateEllipticPoints( wxList* points, + wxCoord xStart, wxCoord yStart, + wxCoord w, wxCoord h, + double sa, double ea ); +#endif + // global DC operations // -------------------- virtual void Clear() = 0; - virtual bool StartDoc(const wxString& WXUNUSED(message)) { return TRUE; } + virtual bool StartDoc(const wxString& WXUNUSED(message)) { return true; } virtual void EndDoc() { } virtual void StartPage() { } virtual void EndPage() { } +#if WXWIN_COMPATIBILITY_2_6 + wxDEPRECATED( void BeginDrawing() ); + wxDEPRECATED( void EndDrawing() ); +#endif // WXWIN_COMPATIBILITY_2_6 + + // set objects to use for drawing // ------------------------------ @@ -316,7 +402,9 @@ public: virtual void SetBrush(const wxBrush& brush) = 0; virtual void SetBackground(const wxBrush& brush) = 0; virtual void SetBackgroundMode(int mode) = 0; +#if wxUSE_PALETTE virtual void SetPalette(const wxPalette& palette) = 0; +#endif // wxUSE_PALETTE // clipping region // --------------- @@ -330,16 +418,13 @@ public: void SetClippingRegion(const wxRegion& region) { DoSetClippingRegionAsRegion(region); } - virtual void DestroyClippingRegion() = 0; + virtual void DestroyClippingRegion() { ResetClipping(); } void GetClippingBox(wxCoord *x, wxCoord *y, wxCoord *w, wxCoord *h) const { DoGetClippingBox(x, y, w, h); } void GetClippingBox(wxRect& rect) const { - // Necessary to use intermediate variables for 16-bit compilation - wxCoord x, y, w, h; - DoGetClippingBox(&x, &y, &w, &h); - rect.x = x; rect.y = y; rect.width = w; rect.height = h; + DoGetClippingBox(&rect.x, &rect.y, &rect.width, &rect.height); } // text extent @@ -363,6 +448,11 @@ public: wxCoord *heightLine = NULL, wxFont *font = NULL); + // Measure cumulative width of text after each character + bool GetPartialTextExtents(const wxString& text, wxArrayInt& widths) const + { return DoGetPartialTextExtents(text, widths); } + + // size and resolution // ------------------- @@ -414,34 +504,26 @@ public: // Resolution in Pixels per inch virtual wxSize GetPPI() const = 0; - virtual bool Ok() const { return m_ok; } + virtual bool Ok() const { return IsOk(); } + virtual bool IsOk() const { return m_ok; } - // accessors - // --------- - - // const... - int GetBackgroundMode() const { return m_backgroundMode; } - const wxBrush& GetBackground() const { return m_backgroundBrush; } - const wxBrush& GetBrush() const { return m_brush; } - const wxFont& GetFont() const { return m_font; } - const wxPen& GetPen() const { return m_pen; } - const wxColour& GetTextBackground() const { return m_textBackgroundColour; } - const wxColour& GetTextForeground() const { return m_textForegroundColour; } + // accessors and setters + // --------------------- - // ... and non const - wxBrush& GetBackground() { return m_backgroundBrush; } - wxBrush& GetBrush() { return m_brush; } - wxFont& GetFont() { return m_font; } - wxPen& GetPen() { return m_pen; } - wxColour& GetTextBackground() { return m_textBackgroundColour; } - wxColour& GetTextForeground() { return m_textForegroundColour; } + virtual int GetBackgroundMode() const { return m_backgroundMode; } + virtual const wxBrush& GetBackground() const { return m_backgroundBrush; } + virtual const wxBrush& GetBrush() const { return m_brush; } + virtual const wxFont& GetFont() const { return m_font; } + virtual const wxPen& GetPen() const { return m_pen; } + virtual const wxColour& GetTextForeground() const { return m_textForegroundColour; } + virtual const wxColour& GetTextBackground() const { return m_textBackgroundColour; } virtual void SetTextForeground(const wxColour& colour) { m_textForegroundColour = colour; } virtual void SetTextBackground(const wxColour& colour) { m_textBackgroundColour = colour; } - int GetMapMode() const { return m_mappingMode; } + virtual int GetMapMode() const { return m_mappingMode; } virtual void SetMapMode(int mode) = 0; virtual void GetUserScale(double *x, double *y) const @@ -474,17 +556,17 @@ public: { wxCoord x, y; DoGetDeviceOrigin(&x, &y); return wxPoint(x, y); } virtual void SetDeviceOrigin(wxCoord x, wxCoord y) = 0; + virtual void ComputeScaleAndOrigin() {} + virtual void SetAxisOrientation(bool xLeftRight, bool yBottomUp) = 0; - int GetLogicalFunction() const { return m_logicalFunction; } + virtual int GetLogicalFunction() const { return m_logicalFunction; } virtual void SetLogicalFunction(int function) = 0; - // Sometimes we need to override optimization, e.g. if other software is - // drawing onto our surface and we can't be sure of who's done what. - // - // FIXME: is this (still) used? +#if WXWIN_COMPATIBILITY_2_4 virtual void SetOptimization(bool WXUNUSED(opt)) { } - virtual bool GetOptimization() { return FALSE; } + virtual bool GetOptimization() { return false; } +#endif // bounding box // ------------ @@ -500,7 +582,7 @@ public: } else { - m_isBBoxValid = TRUE; + m_isBBoxValid = true; m_minX = x; m_minY = y; @@ -511,7 +593,7 @@ public: void ResetBoundingBox() { - m_isBBoxValid = FALSE; + m_isBBoxValid = false; m_minX = m_maxX = m_minY = m_maxY = 0; } @@ -526,7 +608,6 @@ public: // ------------------ // for compatibility with the old code when wxCoord was long everywhere -#ifndef __WIN16__ void GetTextExtent(const wxString& string, long *x, long *y, long *descent = NULL, @@ -575,22 +656,32 @@ public: if (w) *w = ww; if (h) *h = hh; } -#endif // !Win16 -#if WXWIN_COMPATIBILITY - virtual void SetColourMap(const wxPalette& palette) { SetPalette(palette); } - void GetTextExtent(const wxString& string, float *x, float *y, - float *descent = NULL, float *externalLeading = NULL, - wxFont *theFont = NULL, bool use16bit = FALSE) const ; - void GetSize(float* width, float* height) const { int w, h; GetSize(& w, & h); *width = w; *height = h; } - void GetSizeMM(float *width, float *height) const { long w, h; GetSizeMM(& w, & h); *width = (float) w; *height = (float) h; } -#endif // WXWIN_COMPATIBILITY + // RTL related functions + // --------------------- + + // get or change the layout direction (LTR or RTL) for this dc, + // wxLayout_Default is returned if layout direction is not supported + virtual wxLayoutDirection GetLayoutDirection() const + { return wxLayout_Default; } + virtual void SetLayoutDirection(wxLayoutDirection WXUNUSED(dir)) + { } protected: // the pure virtual functions which should be implemented by wxDC - virtual void DoFloodFill(wxCoord x, wxCoord y, const wxColour& col, + virtual bool DoFloodFill(wxCoord x, wxCoord y, const wxColour& col, int style = wxFLOOD_SURFACE) = 0; + virtual void DoGradientFillLinear(const wxRect& rect, + const wxColour& initialColour, + const wxColour& destColour, + wxDirection nDirection = wxEAST); + + virtual void DoGradientFillConcentric(const wxRect& rect, + const wxColour& initialColour, + const wxColour& destColour, + const wxPoint& circleCenter); + virtual bool DoGetPixel(wxCoord x, wxCoord y, wxColour *col) const = 0; virtual void DoDrawPoint(wxCoord x, wxCoord y) = 0; @@ -615,7 +706,7 @@ protected: virtual void DoDrawIcon(const wxIcon& icon, wxCoord x, wxCoord y) = 0; virtual void DoDrawBitmap(const wxBitmap &bmp, wxCoord x, wxCoord y, - bool useMask = FALSE) = 0; + bool useMask = false) = 0; virtual void DoDrawText(const wxString& text, wxCoord x, wxCoord y) = 0; virtual void DoDrawRotatedText(const wxString& text, @@ -624,7 +715,9 @@ protected: virtual bool DoBlit(wxCoord xdest, wxCoord ydest, wxCoord width, wxCoord height, wxDC *source, wxCoord xsrc, wxCoord ysrc, - int rop = wxCOPY, bool useMask = FALSE) = 0; + int rop = wxCOPY, bool useMask = false, wxCoord xsrcMask = wxDefaultCoord, wxCoord ysrcMask = wxDefaultCoord) = 0; + + virtual wxBitmap DoGetAsBitmap(const wxRect *WXUNUSED(subrect)) const { return wxNullBitmap; } virtual void DoGetSize(int *width, int *height) const = 0; virtual void DoGetSizeMM(int* width, int* height) const = 0; @@ -634,29 +727,32 @@ protected: virtual void DoDrawPolygon(int n, wxPoint points[], wxCoord xoffset, wxCoord yoffset, int fillStyle = wxODDEVEN_RULE) = 0; + virtual void DoDrawPolyPolygon(int n, int count[], wxPoint points[], + wxCoord xoffset, wxCoord yoffset, + int fillStyle); virtual void DoSetClippingRegionAsRegion(const wxRegion& region) = 0; virtual void DoSetClippingRegion(wxCoord x, wxCoord y, wxCoord width, wxCoord height) = 0; - // FIXME are these functions really different? +#if WXWIN_COMPATIBILITY_2_4 + // this was only for confusing people, use DoGetClippingBox only virtual void DoGetClippingRegion(wxCoord *x, wxCoord *y, wxCoord *w, wxCoord *h) { DoGetClippingBox(x, y, w, h); } +#endif + virtual void DoGetClippingBox(wxCoord *x, wxCoord *y, wxCoord *w, wxCoord *h) const { - if ( m_clipping ) - { - if ( x ) *x = m_clipX1; - if ( y ) *y = m_clipY1; - if ( w ) *w = m_clipX2 - m_clipX1; - if ( h ) *h = m_clipY2 - m_clipY1; - } - else - { - *x = *y = *w = *h = 0; - } + if ( x ) + *x = m_clipX1; + if ( y ) + *y = m_clipY1; + if ( w ) + *w = m_clipX2 - m_clipX1; + if ( h ) + *h = m_clipY2 - m_clipY1; } virtual void DoGetLogicalOrigin(wxCoord *x, wxCoord *y) const @@ -677,11 +773,21 @@ protected: wxCoord *externalLeading = NULL, wxFont *theFont = NULL) const = 0; + virtual bool DoGetPartialTextExtents(const wxString& text, wxArrayInt& widths) const; + #if wxUSE_SPLINES virtual void DoDrawSpline(wxList *points); #endif protected: + // unset clipping variables (after clipping region was destroyed) + void ResetClipping() + { + m_clipping = false; + + m_clipX1 = m_clipX2 = m_clipY1 = m_clipY2 = 0; + } + // flags bool m_colour:1; bool m_ok:1; @@ -718,10 +824,14 @@ protected: wxColour m_textForegroundColour; wxColour m_textBackgroundColour; wxFont m_font; + +#if wxUSE_PALETTE wxPalette m_palette; + bool m_hasCustomPalette; +#endif // wxUSE_PALETTE private: - DECLARE_NO_COPY_CLASS(wxDCBase); + DECLARE_NO_COPY_CLASS(wxDCBase) DECLARE_ABSTRACT_CLASS(wxDCBase) }; @@ -729,22 +839,32 @@ private: // now include the declaration of wxDC class // ---------------------------------------------------------------------------- -#if defined(__WXMSW__) +#if defined(__WXPALMOS__) + #include "wx/palmos/dc.h" +#elif defined(__WXMSW__) #include "wx/msw/dc.h" #elif defined(__WXMOTIF__) #include "wx/motif/dc.h" -#elif defined(__WXGTK__) +#elif defined(__WXGTK20__) #include "wx/gtk/dc.h" +#elif defined(__WXGTK__) + #include "wx/gtk1/dc.h" +#elif defined(__WXX11__) + #include "wx/x11/dc.h" #elif defined(__WXMGL__) #include "wx/mgl/dc.h" -#elif defined(__WXQT__) - #include "wx/qt/dc.h" +#elif defined(__WXDFB__) + #include "wx/dfb/dc.h" #elif defined(__WXMAC__) #include "wx/mac/dc.h" +#elif defined(__WXCOCOA__) + #include "wx/cocoa/dc.h" #elif defined(__WXPM__) #include "wx/os2/dc.h" -#elif defined(__WXSTUBS__) - #include "wx/stubs/dc.h" +#endif + +#if wxUSE_GRAPHICS_CONTEXT + #include "wx/dcgraph.h" #endif // ---------------------------------------------------------------------------- @@ -755,7 +875,12 @@ private: class WXDLLEXPORT wxDCTextColourChanger { public: - wxDCTextColourChanger(wxDC& dc) : m_dc(dc) { } + wxDCTextColourChanger(wxDC& dc) : m_dc(dc), m_colFgOld() { } + + wxDCTextColourChanger(wxDC& dc, const wxColour& col) : m_dc(dc) + { + Set(col); + } ~wxDCTextColourChanger() { @@ -774,7 +899,85 @@ private: wxDC& m_dc; wxColour m_colFgOld; + + DECLARE_NO_COPY_CLASS(wxDCTextColourChanger) }; -#endif - // _WX_DC_H_BASE_ +// ---------------------------------------------------------------------------- +// helper class: you can use it to temporarily change the DC pen and +// restore it automatically when the object goes out of scope +// ---------------------------------------------------------------------------- + +class WXDLLEXPORT wxDCPenChanger +{ +public: + wxDCPenChanger(wxDC& dc, const wxPen& pen) : m_dc(dc), m_penOld(dc.GetPen()) + { + m_dc.SetPen(pen); + } + + ~wxDCPenChanger() + { + if ( m_penOld.Ok() ) + m_dc.SetPen(m_penOld); + } + +private: + wxDC& m_dc; + + wxPen m_penOld; + + DECLARE_NO_COPY_CLASS(wxDCPenChanger) +}; + +// ---------------------------------------------------------------------------- +// helper class: you can use it to temporarily change the DC brush and +// restore it automatically when the object goes out of scope +// ---------------------------------------------------------------------------- + +class WXDLLEXPORT wxDCBrushChanger +{ +public: + wxDCBrushChanger(wxDC& dc, const wxBrush& brush) : m_dc(dc), m_brushOld(dc.GetBrush()) + { + m_dc.SetBrush(brush); + } + + ~wxDCBrushChanger() + { + if ( m_brushOld.Ok() ) + m_dc.SetBrush(m_brushOld); + } + +private: + wxDC& m_dc; + + wxBrush m_brushOld; + + DECLARE_NO_COPY_CLASS(wxDCBrushChanger) +}; + +// ---------------------------------------------------------------------------- +// another small helper class: sets the clipping region in its ctor and +// destroys it in the dtor +// ---------------------------------------------------------------------------- + +class WXDLLEXPORT wxDCClipper +{ +public: + wxDCClipper(wxDC& dc, const wxRegion& r) : m_dc(dc) + { dc.SetClippingRegion(r); } + 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) + { dc.SetClippingRegion(x, y, w, h); } + + ~wxDCClipper() { m_dc.DestroyClippingRegion(); } + +private: + wxDC& m_dc; + + DECLARE_NO_COPY_CLASS(wxDCClipper) +}; + +#endif // _WX_DC_H_BASE_