///////////////////////////////////////////////////////////////////////////// // Name: dc.h // Purpose: wxDC class // Author: Vadim Zeitlin // Modified by: // Created: 05/25/99 // RCS-ID: $Id$ // Copyright: (c) wxWindows team // Licence: wxWindows licence ///////////////////////////////////////////////////////////////////////////// #ifndef _WX_DC_H_BASE_ #define _WX_DC_H_BASE_ #if defined(__GNUG__) && !defined(NO_GCC_PRAGMA) #pragma interface "dcbase.h" #endif // ---------------------------------------------------------------------------- // headers which we must include here // ---------------------------------------------------------------------------- #include "wx/object.h" // the base class #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/brush.h" #include "wx/pen.h" #include "wx/palette.h" #include "wx/list.h" // we use wxList in inline functions class WXDLLEXPORT wxDC; class WXDLLEXPORT wxDCBase; class WXDLLEXPORT wxDrawObject { public: wxDrawObject() : m_isBBoxValid(FALSE) , m_minX(0), m_minY(0), m_maxX(0), m_maxY(0) { } virtual ~wxDrawObject() { } virtual void Draw(wxDCBase&) const { } virtual void CalcBoundingBox(wxCoord x, wxCoord y) { if ( m_isBBoxValid ) { if ( x < m_minX ) m_minX = x; if ( y < m_minY ) m_minY = y; if ( x > m_maxX ) m_maxX = x; if ( y > m_maxY ) m_maxY = y; } else { m_isBBoxValid = TRUE; m_minX = x; m_minY = y; m_maxX = x; m_maxY = y; } } void ResetBoundingBox() { m_isBBoxValid = FALSE; m_minX = m_maxX = m_minY = m_maxY = 0; } // Get the final bounding box of the PostScript or Metafile picture. wxCoord MinX() const { return m_minX; } wxCoord MaxX() const { return m_maxX; } wxCoord MinY() const { return m_minY; } wxCoord MaxY() const { return m_maxY; } //to define the type of object for derived objects virtual int GetType()=0; protected: //for boundingbox calculation bool m_isBBoxValid:1; //for boundingbox calculation wxCoord m_minX, m_minY, m_maxX, m_maxY; }; // --------------------------------------------------------------------------- // global variables // --------------------------------------------------------------------------- WXDLLEXPORT_DATA(extern int) wxPageNumber; // --------------------------------------------------------------------------- // wxDC is the device context - object on which any drawing is done // --------------------------------------------------------------------------- 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 { ResetBoundingBox(); } ~wxDCBase() { } virtual void BeginDrawing() { } virtual void EndDrawing() { } // graphic primitives // ------------------ virtual void DrawObject(wxDrawObject* drawobject) { drawobject->Draw(*this); CalcBoundingBox(drawobject->MinX(),drawobject->MinY()); CalcBoundingBox(drawobject->MaxX(),drawobject->MaxY()); } bool FloodFill(wxCoord x, wxCoord y, const wxColour& col, int style = wxFLOOD_SURFACE) { return DoFloodFill(x, y, col, style); } bool FloodFill(const wxPoint& pt, const wxColour& col, int style = wxFLOOD_SURFACE) { return DoFloodFill(pt.x, pt.y, col, style); } bool GetPixel(wxCoord x, wxCoord y, wxColour *col) const { return DoGetPixel(x, y, col); } bool GetPixel(const wxPoint& pt, wxColour *col) const { return DoGetPixel(pt.x, pt.y, col); } void DrawLine(wxCoord x1, wxCoord y1, wxCoord x2, wxCoord y2) { DoDrawLine(x1, y1, x2, y2); } void DrawLine(const wxPoint& pt1, const wxPoint& pt2) { DoDrawLine(pt1.x, pt1.y, pt2.x, pt2.y); } void CrossHair(wxCoord x, wxCoord y) { DoCrossHair(x, y); } void CrossHair(const wxPoint& pt) { DoCrossHair(pt.x, pt.y); } void DrawArc(wxCoord x1, wxCoord y1, wxCoord x2, wxCoord y2, wxCoord xc, wxCoord yc) { DoDrawArc(x1, y1, x2, y2, xc, yc); } void DrawArc(const wxPoint& pt1, const wxPoint& pt2, const wxPoint& centre) { DoDrawArc(pt1.x, pt1.y, pt2.x, pt2.y, centre.x, centre.y); } void DrawCheckMark(wxCoord x, wxCoord y, wxCoord width, wxCoord height) { DoDrawCheckMark(x, y, width, height); } void DrawCheckMark(const wxRect& rect) { DoDrawCheckMark(rect.x, rect.y, rect.width, rect.height); } void DrawEllipticArc(wxCoord x, wxCoord y, wxCoord w, wxCoord h, double sa, double ea) { DoDrawEllipticArc(x, y, w, h, sa, ea); } void DrawEllipticArc(const wxPoint& pt, const wxSize& sz, double sa, double ea) { DoDrawEllipticArc(pt.x, pt.y, sz.x, sz.y, sa, ea); } void DrawPoint(wxCoord x, wxCoord y) { DoDrawPoint(x, y); } void DrawPoint(const wxPoint& pt) { DoDrawPoint(pt.x, pt.y); } void DrawLines(int n, wxPoint points[], wxCoord xoffset = 0, wxCoord yoffset = 0) { DoDrawLines(n, points, xoffset, yoffset); } void DrawLines(const wxList *list, wxCoord xoffset = 0, wxCoord yoffset = 0); void DrawPolygon(int n, wxPoint points[], wxCoord xoffset = 0, wxCoord yoffset = 0, int fillStyle = wxODDEVEN_RULE) { DoDrawPolygon(n, points, xoffset, yoffset, fillStyle); } void DrawPolygon(const wxList *list, wxCoord xoffset = 0, wxCoord yoffset = 0, int fillStyle = wxODDEVEN_RULE); void DrawRectangle(wxCoord x, wxCoord y, wxCoord width, wxCoord height) { DoDrawRectangle(x, y, width, height); } void DrawRectangle(const wxPoint& pt, const wxSize& sz) { DoDrawRectangle(pt.x, pt.y, sz.x, sz.y); } void DrawRectangle(const wxRect& rect) { DoDrawRectangle(rect.x, rect.y, rect.width, rect.height); } void DrawRoundedRectangle(wxCoord x, wxCoord y, wxCoord width, wxCoord height, double radius) { DoDrawRoundedRectangle(x, y, width, height, radius); } void DrawRoundedRectangle(const wxPoint& pt, const wxSize& sz, double radius) { DoDrawRoundedRectangle(pt.x, pt.y, sz.x, sz.y, radius); } void DrawRoundedRectangle(const wxRect& r, double radius) { DoDrawRoundedRectangle(r.x, r.y, r.width, r.height, radius); } 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) { DoDrawEllipse(pt.x, pt.y, sz.x, sz.y); } void DrawEllipse(const wxRect& rect) { DoDrawEllipse(rect.x, rect.y, rect.width, rect.height); } void DrawIcon(const wxIcon& icon, wxCoord x, wxCoord y) { DoDrawIcon(icon, x, y); } void DrawIcon(const wxIcon& icon, const wxPoint& pt) { DoDrawIcon(icon, pt.x, pt.y); } void DrawBitmap(const wxBitmap &bmp, wxCoord x, wxCoord y, bool useMask = FALSE) { DoDrawBitmap(bmp, x, y, useMask); } void DrawBitmap(const wxBitmap &bmp, const wxPoint& pt, bool useMask = FALSE) { DoDrawBitmap(bmp, pt.x, pt.y, useMask); } void DrawText(const wxString& text, wxCoord x, wxCoord y) { DoDrawText(text, x, y); } void DrawText(const wxString& text, const wxPoint& pt) { DoDrawText(text, pt.x, pt.y); } void DrawRotatedText(const wxString& text, wxCoord x, wxCoord y, double angle) { DoDrawRotatedText(text, x, y, angle); } void DrawRotatedText(const wxString& text, const wxPoint& pt, double angle) { DoDrawRotatedText(text, pt.x, pt.y, angle); } // this version puts both optional bitmap and the text into the given // rectangle and aligns is as specified by alignment parameter; it also // will emphasize the character with the given index if it is != -1 and // return the bounding rectangle if required virtual void DrawLabel(const wxString& text, const wxBitmap& image, const wxRect& rect, int alignment = wxALIGN_LEFT | wxALIGN_TOP, int indexAccel = -1, wxRect *rectBounding = NULL); void DrawLabel(const wxString& text, const wxRect& rect, int alignment = wxALIGN_LEFT | wxALIGN_TOP, int indexAccel = -1) { DrawLabel(text, wxNullBitmap, rect, alignment, indexAccel); } bool Blit(wxCoord xdest, wxCoord ydest, wxCoord width, wxCoord height, wxDC *source, wxCoord xsrc, wxCoord ysrc, int rop = wxCOPY, bool useMask = FALSE, wxCoord xsrcMask = -1, wxCoord ysrcMask = -1) { return DoBlit(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 = wxPoint(-1, -1)) { return DoBlit(destPt.x, destPt.y, sz.x, sz.y, source, srcPt.x, srcPt.y, rop, useMask, srcPtMask.x, srcPtMask.y); } #if wxUSE_SPLINES // TODO: this API needs fixing (wxPointList, why (!const) "wxList *"?) void DrawSpline(wxCoord x1, wxCoord y1, wxCoord x2, wxCoord y2, wxCoord x3, wxCoord y3); void DrawSpline(int n, wxPoint points[]); 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() ); // 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 void EndDoc() { } virtual void StartPage() { } virtual void EndPage() { } // set objects to use for drawing // ------------------------------ virtual void SetFont(const wxFont& font) = 0; virtual void SetPen(const wxPen& pen) = 0; 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 // --------------- void SetClippingRegion(wxCoord x, wxCoord y, wxCoord width, wxCoord height) { DoSetClippingRegion(x, y, width, height); } void SetClippingRegion(const wxPoint& pt, const wxSize& sz) { DoSetClippingRegion(pt.x, pt.y, sz.x, sz.y); } void SetClippingRegion(const wxRect& rect) { DoSetClippingRegion(rect.x, rect.y, rect.width, rect.height); } void SetClippingRegion(const wxRegion& region) { DoSetClippingRegionAsRegion(region); } virtual void DestroyClippingRegion() = 0; void GetClippingBox(wxCoord *x, wxCoord *y, wxCoord *w, wxCoord *h) const { DoGetClippingBox(x, y, w, h); } void GetClippingBox(wxRect& rect) const { #if 1 DoGetClippingBox(&rect.x, &rect.y, &rect.width, &rect.height); #else // Necessary to use intermediate variables for 16-bit compilation // REMOVE ME if the above is OK for all current platforms wxCoord x, y, w, h; DoGetClippingBox(&x, &y, &w, &h); rect.x = x; rect.y = y; rect.width = w; rect.height = h; #endif } // text extent // ----------- virtual wxCoord GetCharHeight() const = 0; virtual wxCoord GetCharWidth() const = 0; // only works for single line strings void GetTextExtent(const wxString& string, wxCoord *x, wxCoord *y, wxCoord *descent = NULL, wxCoord *externalLeading = NULL, wxFont *theFont = NULL) const { DoGetTextExtent(string, x, y, descent, externalLeading, theFont); } // works for single as well as multi-line strings virtual void GetMultiLineTextExtent(const wxString& text, wxCoord *width, wxCoord *height, wxCoord *heightLine = NULL, wxFont *font = NULL); // size and resolution // ------------------- // in device units void GetSize(int *width, int *height) const { DoGetSize(width, height); } wxSize GetSize() const { int w, h; DoGetSize(&w, &h); return wxSize(w, h); } // in mm void GetSizeMM(int* width, int* height) const { DoGetSizeMM(width, height); } wxSize GetSizeMM() const { int w, h; DoGetSizeMM(&w, &h); return wxSize(w, h); } // coordinates conversions // ----------------------- // This group of functions does actual conversion of the input, as you'd // expect. wxCoord DeviceToLogicalX(wxCoord x) const; wxCoord DeviceToLogicalY(wxCoord y) const; wxCoord DeviceToLogicalXRel(wxCoord x) const; wxCoord DeviceToLogicalYRel(wxCoord y) const; wxCoord LogicalToDeviceX(wxCoord x) const; wxCoord LogicalToDeviceY(wxCoord y) const; wxCoord LogicalToDeviceXRel(wxCoord x) const; wxCoord LogicalToDeviceYRel(wxCoord y) const; // query DC capabilities // --------------------- virtual bool CanDrawBitmap() const = 0; virtual bool CanGetTextExtent() const = 0; // colour depth virtual int GetDepth() const = 0; // Resolution in Pixels per inch virtual wxSize GetPPI() const = 0; virtual bool Ok() 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; } // ... 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 void SetTextForeground(const wxColour& colour) { m_textForegroundColour = colour; } virtual void SetTextBackground(const wxColour& colour) { m_textBackgroundColour = colour; } int GetMapMode() const { return m_mappingMode; } virtual void SetMapMode(int mode) = 0; virtual void GetUserScale(double *x, double *y) const { if ( x ) *x = m_userScaleX; if ( y ) *y = m_userScaleY; } virtual void SetUserScale(double x, double y) = 0; virtual void GetLogicalScale(double *x, double *y) { if ( x ) *x = m_logicalScaleX; if ( y ) *y = m_logicalScaleY; } virtual void SetLogicalScale(double x, double y) { m_logicalScaleX = x; m_logicalScaleY = y; } void GetLogicalOrigin(wxCoord *x, wxCoord *y) const { DoGetLogicalOrigin(x, y); } wxPoint GetLogicalOrigin() const { wxCoord x, y; DoGetLogicalOrigin(&x, &y); return wxPoint(x, y); } virtual void SetLogicalOrigin(wxCoord x, wxCoord y) = 0; void GetDeviceOrigin(wxCoord *x, wxCoord *y) const { DoGetDeviceOrigin(x, y); } wxPoint GetDeviceOrigin() const { wxCoord x, y; DoGetDeviceOrigin(&x, &y); return wxPoint(x, y); } virtual void SetDeviceOrigin(wxCoord x, wxCoord y) = 0; virtual void SetAxisOrientation(bool xLeftRight, bool yBottomUp) = 0; 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? virtual void SetOptimization(bool WXUNUSED(opt)) { } virtual bool GetOptimization() { return FALSE; } // bounding box // ------------ virtual void CalcBoundingBox(wxCoord x, wxCoord y) { if ( m_isBBoxValid ) { if ( x < m_minX ) m_minX = x; if ( y < m_minY ) m_minY = y; if ( x > m_maxX ) m_maxX = x; if ( y > m_maxY ) m_maxY = y; } else { m_isBBoxValid = TRUE; m_minX = x; m_minY = y; m_maxX = x; m_maxY = y; } } void ResetBoundingBox() { m_isBBoxValid = FALSE; m_minX = m_maxX = m_minY = m_maxY = 0; } // Get the final bounding box of the PostScript or Metafile picture. wxCoord MinX() const { return m_minX; } wxCoord MaxX() const { return m_maxX; } wxCoord MinY() const { return m_minY; } wxCoord MaxY() const { return m_maxY; } // misc old functions // ------------------ // 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, long *externalLeading = NULL, wxFont *theFont = NULL) const { wxCoord x2, y2, descent2, externalLeading2; DoGetTextExtent(string, &x2, &y2, &descent2, &externalLeading2, theFont); if ( x ) *x = x2; if ( y ) *y = y2; if ( descent ) *descent = descent2; if ( externalLeading ) *externalLeading = externalLeading2; } void GetLogicalOrigin(long *x, long *y) const { wxCoord x2, y2; DoGetLogicalOrigin(&x2, &y2); if ( x ) *x = x2; if ( y ) *y = y2; } void GetDeviceOrigin(long *x, long *y) const { wxCoord x2, y2; DoGetDeviceOrigin(&x2, &y2); if ( x ) *x = x2; if ( y ) *y = y2; } void GetClippingBox(long *x, long *y, long *w, long *h) const { wxCoord xx,yy,ww,hh; DoGetClippingBox(&xx, &yy, &ww, &hh); if (x) *x = xx; if (y) *y = yy; if (w) *w = ww; if (h) *h = hh; } #endif // !Win16 protected: // the pure virtual functions which should be implemented by wxDC virtual bool DoFloodFill(wxCoord x, wxCoord y, const wxColour& col, int style = wxFLOOD_SURFACE) = 0; virtual bool DoGetPixel(wxCoord x, wxCoord y, wxColour *col) const = 0; virtual void DoDrawPoint(wxCoord x, wxCoord y) = 0; virtual void DoDrawLine(wxCoord x1, wxCoord y1, wxCoord x2, wxCoord y2) = 0; virtual void DoDrawArc(wxCoord x1, wxCoord y1, wxCoord x2, wxCoord y2, wxCoord xc, wxCoord yc) = 0; virtual void DoDrawCheckMark(wxCoord x, wxCoord y, wxCoord width, wxCoord height); virtual void DoDrawEllipticArc(wxCoord x, wxCoord y, wxCoord w, wxCoord h, double sa, double ea) = 0; virtual void DoDrawRectangle(wxCoord x, wxCoord y, wxCoord width, wxCoord height) = 0; virtual void DoDrawRoundedRectangle(wxCoord x, wxCoord y, wxCoord width, wxCoord height, double radius) = 0; virtual void DoDrawEllipse(wxCoord x, wxCoord y, wxCoord width, wxCoord height) = 0; virtual void DoCrossHair(wxCoord x, wxCoord y) = 0; 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; virtual void DoDrawText(const wxString& text, wxCoord x, wxCoord y) = 0; virtual void DoDrawRotatedText(const wxString& text, wxCoord x, wxCoord y, double angle) = 0; 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 = -1, wxCoord ysrcMask = -1) = 0; virtual void DoGetSize(int *width, int *height) const = 0; virtual void DoGetSizeMM(int* width, int* height) const = 0; virtual void DoDrawLines(int n, wxPoint points[], wxCoord xoffset, wxCoord yoffset) = 0; virtual void DoDrawPolygon(int n, wxPoint points[], wxCoord xoffset, wxCoord yoffset, int fillStyle = wxODDEVEN_RULE) = 0; 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? virtual void DoGetClippingRegion(wxCoord *x, wxCoord *y, wxCoord *w, wxCoord *h) { DoGetClippingBox(x, y, w, h); } 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; } } virtual void DoGetLogicalOrigin(wxCoord *x, wxCoord *y) const { if ( x ) *x = m_logicalOriginX; if ( y ) *y = m_logicalOriginY; } virtual void DoGetDeviceOrigin(wxCoord *x, wxCoord *y) const { if ( x ) *x = m_deviceOriginX; if ( y ) *y = m_deviceOriginY; } virtual void DoGetTextExtent(const wxString& string, wxCoord *x, wxCoord *y, wxCoord *descent = NULL, wxCoord *externalLeading = NULL, wxFont *theFont = NULL) const = 0; #if wxUSE_SPLINES virtual void DoDrawSpline(wxList *points); #endif protected: // flags bool m_colour:1; bool m_ok:1; bool m_clipping:1; bool m_isInteractive:1; bool m_isBBoxValid:1; // coordinate system variables // TODO short descriptions of what exactly they are would be nice... wxCoord m_logicalOriginX, m_logicalOriginY; wxCoord m_deviceOriginX, m_deviceOriginY; double m_logicalScaleX, m_logicalScaleY; double m_userScaleX, m_userScaleY; double m_scaleX, m_scaleY; // Used by SetAxisOrientation() to invert the axes int m_signX, m_signY; // bounding and clipping boxes wxCoord m_minX, m_minY, m_maxX, m_maxY; wxCoord m_clipX1, m_clipY1, m_clipX2, m_clipY2; int m_logicalFunction; int m_backgroundMode; int m_mappingMode; // GDI objects wxPen m_pen; wxBrush m_brush; wxBrush m_backgroundBrush; 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_ABSTRACT_CLASS(wxDCBase) }; // ---------------------------------------------------------------------------- // now include the declaration of wxDC class // ---------------------------------------------------------------------------- #if defined(__WXMSW__) #include "wx/msw/dc.h" #elif defined(__WXMOTIF__) #include "wx/motif/dc.h" #elif defined(__WXGTK__) #include "wx/gtk/dc.h" #elif defined(__WXX11__) #include "wx/x11/dc.h" #elif defined(__WXMGL__) #include "wx/mgl/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" #endif // ---------------------------------------------------------------------------- // helper class: you can use it to temporarily change the DC text colour and // restore it automatically when the object goes out of scope // ---------------------------------------------------------------------------- class WXDLLEXPORT wxDCTextColourChanger { public: wxDCTextColourChanger(wxDC& dc) : m_dc(dc), m_colFgOld() { } ~wxDCTextColourChanger() { if ( m_colFgOld.Ok() ) m_dc.SetTextForeground(m_colFgOld); } void Set(const wxColour& col) { if ( !m_colFgOld.Ok() ) m_colFgOld = m_dc.GetTextForeground(); m_dc.SetTextForeground(col); } private: wxDC& m_dc; wxColour m_colFgOld; DECLARE_NO_COPY_CLASS(wxDCTextColourChanger) }; // ---------------------------------------------------------------------------- // 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 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_