X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/34138703c3997ce676a1e713d9ff9eb020640da7..b1d66b5415f7befb45e050d7097571642b8bfa56:/include/wx/dc.h

diff --git a/include/wx/dc.h b/include/wx/dc.h
index 2cf32f30d2..ccf87a1784 100644
--- a/include/wx/dc.h
+++ b/include/wx/dc.h
@@ -1,19 +1,820 @@
+/////////////////////////////////////////////////////////////////////////////
+// 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_
 
+#ifdef __GNUG__
+    #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 wxDCBase;
+
+class WXDLLEXPORT wxDrawObject
+{
+public:
+
+    wxDrawObject()
+    {
+        ResetBoundingBox();
+    }
+
+    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_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();
+    }
+
+    ~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());
+    }
+
+    void 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,
+                   int style = wxFLOOD_SURFACE)
+        { 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 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
+
+    // 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
+        {
+          // 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;
+        }
+
+    // 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; }
+
+    // Some platforms have a DC cache, which should be cleared
+    // at appropriate points such as after a series of DC operations.
+    // Put ClearCache in the wxDC implementation class, since it has to be
+    // static.
+    // static void ClearCache() ;
+#if 0 // wxUSE_DC_CACHEING
+    static void EnableCache(bool cacheing) { sm_cacheing = cacheing; }
+    static bool CacheEnabled() { return sm_cacheing ; }
+#endif
+
+    // 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
+
+#if WXWIN_COMPATIBILITY
+
+#if wxUSE_PALETTE
+    virtual void SetColourMap(const wxPalette& palette) { SetPalette(palette); }
+#endif // wxUSE_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
+
+protected:
+    // the pure virtual functions which should be implemented by wxDC
+    virtual void 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;
+#if wxUSE_DC_CACHEING
+//    static bool sm_cacheing;
+#endif
+
+    // 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;
+#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"
+    #include "wx/msw/dc.h"
 #elif defined(__WXMOTIF__)
-#include "wx/motif/dc.h"
+    #include "wx/motif/dc.h"
 #elif defined(__WXGTK__)
-#include "wx/gtk/dc.h"
-#elif defined(__WXQT__)
-#include "wx/qt/dc.h"
+    #include "wx/gtk/dc.h"
+#elif defined(__WXMGL__)
+    #include "wx/mgl/dc.h"
 #elif defined(__WXMAC__)
-#include "wx/mac/dc.h"
+    #include "wx/mac/dc.h"
+#elif defined(__WXPM__)
+    #include "wx/os2/dc.h"
 #elif defined(__WXSTUBS__)
-#include "wx/stubs/dc.h"
+    #include "wx/stubs/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) { }
+
+    ~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;
+};
+
+// ----------------------------------------------------------------------------
+// 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;
+};
+
 #endif
     // _WX_DC_H_BASE_