include/wx/dc.h

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        dc.h
   3 // Purpose:     wxDC class
   4 // Author:      Vadim Zeitlin
   5 // Modified by:
   6 // Created:     05/25/99
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) wxWindows team
   9 // Licence:     wxWindows licence
  10 /////////////////////////////////////////////////////////////////////////////
  11
  12 #ifndef _WX_DC_H_BASE_
  13 #define _WX_DC_H_BASE_
  14
  15 #ifdef __GNUG__
  16     #pragma interface "dcbase.h"
  17 #endif
  18
  19 // ----------------------------------------------------------------------------
  20 // headers which we must include here
  21 // ----------------------------------------------------------------------------
  22
  23 #include "wx/object.h"          // the base class
  24
  25 #include "wx/cursor.h"          // we have member variables of these classes
  26 #include "wx/font.h"            // so we can't do without them
  27 #include "wx/colour.h"
  28 #include "wx/brush.h"
  29 #include "wx/pen.h"
  30 #include "wx/palette.h"
  31
  32 #include "wx/list.h"            // we use wxList in inline functions
  33
  34 class WXDLLEXPORT wxDCBase;
  35
  36 class WXDLLEXPORT wxDrawObject
  37 {
  38 public:
  39
  40     wxDrawObject()
  41     {
  42         ResetBoundingBox();
  43     }
  44
  45     virtual ~wxDrawObject() { }
  46
  47     virtual void Draw(wxDCBase& dc) const { }
  48
  49     virtual void CalcBoundingBox(wxCoord x, wxCoord y)
  50     {
  51       if ( m_isBBoxValid )
  52       {
  53          if ( x < m_minX ) m_minX = x;
  54          if ( y < m_minY ) m_minY = y;
  55          if ( x > m_maxX ) m_maxX = x;
  56          if ( y > m_maxY ) m_maxY = y;
  57       }
  58       else
  59       {
  60          m_isBBoxValid = TRUE;
  61
  62          m_minX = x;
  63          m_minY = y;
  64          m_maxX = x;
  65          m_maxY = y;
  66       }
  67     }
  68
  69     void ResetBoundingBox()
  70     {
  71         m_isBBoxValid = FALSE;
  72
  73         m_minX = m_maxX = m_minY = m_maxY = 0;
  74     }
  75
  76     // Get the final bounding box of the PostScript or Metafile picture.
  77
  78     wxCoord MinX() const { return m_minX; }
  79     wxCoord MaxX() const { return m_maxX; }
  80     wxCoord MinY() const { return m_minY; }
  81     wxCoord MaxY() const { return m_maxY; }
  82
  83     //to define the type of object for derived objects
  84     virtual int GetType()=0;
  85
  86 protected:
  87     //for boundingbox calculation
  88     bool m_isBBoxValid:1;
  89     //for boundingbox calculation
  90     wxCoord m_minX, m_minY, m_maxX, m_maxY;
  91 };
  92
  93 // ---------------------------------------------------------------------------
  94 // global variables
  95 // ---------------------------------------------------------------------------
  96
  97 WXDLLEXPORT_DATA(extern int) wxPageNumber;
  98
  99 // ---------------------------------------------------------------------------
 100 // wxDC is the device context - object on which any drawing is done
 101 // ---------------------------------------------------------------------------
 102
 103 class WXDLLEXPORT wxDCBase : public wxObject
 104 {
 105 public:
 106     wxDCBase()
 107     {
 108         m_clipping = FALSE;
 109         m_ok = TRUE;
 110
 111         ResetBoundingBox();
 112
 113         m_signX = m_signY = 1;
 114
 115         m_logicalOriginX = m_logicalOriginY =
 116         m_deviceOriginX = m_deviceOriginY = 0;
 117
 118         m_logicalScaleX = m_logicalScaleY =
 119         m_userScaleX = m_userScaleY =
 120         m_scaleX = m_scaleY = 1.0;
 121
 122         m_logicalFunction = wxCOPY;
 123
 124         m_backgroundMode = wxTRANSPARENT;
 125
 126         m_mappingMode = wxMM_TEXT;
 127
 128         m_backgroundBrush = *wxTRANSPARENT_BRUSH;
 129
 130         m_textForegroundColour = *wxBLACK;
 131         m_textBackgroundColour = *wxWHITE;
 132
 133         m_colour = wxColourDisplay();
 134     }
 135
 136     ~wxDCBase() { }
 137
 138     virtual void BeginDrawing() { }
 139     virtual void EndDrawing() { }
 140
 141     // graphic primitives
 142     // ------------------
 143
 144     virtual void DrawObject(wxDrawObject* drawobject)
 145     {
 146         drawobject->Draw(*this);
 147         CalcBoundingBox(drawobject->MinX(),drawobject->MinY());
 148         CalcBoundingBox(drawobject->MaxX(),drawobject->MaxY());
 149     }
 150
 151     void FloodFill(wxCoord x, wxCoord y, const wxColour& col,
 152                    int style = wxFLOOD_SURFACE)
 153         { DoFloodFill(x, y, col, style); }
 154     void FloodFill(const wxPoint& pt, const wxColour& col,
 155                    int style = wxFLOOD_SURFACE)
 156         { DoFloodFill(pt.x, pt.y, col, style); }
 157
 158     bool GetPixel(wxCoord x, wxCoord y, wxColour *col) const
 159         { return DoGetPixel(x, y, col); }
 160     bool GetPixel(const wxPoint& pt, wxColour *col) const
 161         { return DoGetPixel(pt.x, pt.y, col); }
 162
 163     void DrawLine(wxCoord x1, wxCoord y1, wxCoord x2, wxCoord y2)
 164         { DoDrawLine(x1, y1, x2, y2); }
 165     void DrawLine(const wxPoint& pt1, const wxPoint& pt2)
 166         { DoDrawLine(pt1.x, pt1.y, pt2.x, pt2.y); }
 167
 168     void CrossHair(wxCoord x, wxCoord y)
 169         { DoCrossHair(x, y); }
 170     void CrossHair(const wxPoint& pt)
 171         { DoCrossHair(pt.x, pt.y); }
 172
 173     void DrawArc(wxCoord x1, wxCoord y1, wxCoord x2, wxCoord y2,
 174                  wxCoord xc, wxCoord yc)
 175         { DoDrawArc(x1, y1, x2, y2, xc, yc); }
 176     void DrawArc(const wxPoint& pt1, const wxPoint& pt2, const wxPoint& centre)
 177         { DoDrawArc(pt1.x, pt1.y, pt2.x, pt2.y, centre.x, centre.y); }
 178
 179     void DrawCheckMark(wxCoord x, wxCoord y,
 180                        wxCoord width, wxCoord height)
 181         { DoDrawCheckMark(x, y, width, height); }
 182     void DrawCheckMark(const wxRect& rect)
 183         { DoDrawCheckMark(rect.x, rect.y, rect.width, rect.height); }
 184
 185     void DrawEllipticArc(wxCoord x, wxCoord y, wxCoord w, wxCoord h,
 186                          double sa, double ea)
 187         { DoDrawEllipticArc(x, y, w, h, sa, ea); }
 188     void DrawEllipticArc(const wxPoint& pt, const wxSize& sz,
 189                          double sa, double ea)
 190         { DoDrawEllipticArc(pt.x, pt.y, sz.x, sz.y, sa, ea); }
 191
 192     void DrawPoint(wxCoord x, wxCoord y)
 193         { DoDrawPoint(x, y); }
 194     void DrawPoint(const wxPoint& pt)
 195         { DoDrawPoint(pt.x, pt.y); }
 196
 197     void DrawLines(int n, wxPoint points[],
 198                    wxCoord xoffset = 0, wxCoord yoffset = 0)
 199         { DoDrawLines(n, points, xoffset, yoffset); }
 200     void DrawLines(const wxList *list,
 201                    wxCoord xoffset = 0, wxCoord yoffset = 0);
 202
 203     void DrawPolygon(int n, wxPoint points[],
 204                      wxCoord xoffset = 0, wxCoord yoffset = 0,
 205                      int fillStyle = wxODDEVEN_RULE)
 206         { DoDrawPolygon(n, points, xoffset, yoffset, fillStyle); }
 207
 208     void DrawPolygon(const wxList *list,
 209                      wxCoord xoffset = 0, wxCoord yoffset = 0,
 210                      int fillStyle = wxODDEVEN_RULE);
 211
 212     void DrawRectangle(wxCoord x, wxCoord y, wxCoord width, wxCoord height)
 213         { DoDrawRectangle(x, y, width, height); }
 214     void DrawRectangle(const wxPoint& pt, const wxSize& sz)
 215         { DoDrawRectangle(pt.x, pt.y, sz.x, sz.y); }
 216     void DrawRectangle(const wxRect& rect)
 217         { DoDrawRectangle(rect.x, rect.y, rect.width, rect.height); }
 218
 219     void DrawRoundedRectangle(wxCoord x, wxCoord y, wxCoord width, wxCoord height,
 220                               double radius)
 221         { DoDrawRoundedRectangle(x, y, width, height, radius); }
 222     void DrawRoundedRectangle(const wxPoint& pt, const wxSize& sz,
 223                              double radius)
 224         { DoDrawRoundedRectangle(pt.x, pt.y, sz.x, sz.y, radius); }
 225     void DrawRoundedRectangle(const wxRect& r, double radius)
 226         { DoDrawRoundedRectangle(r.x, r.y, r.width, r.height, radius); }
 227
 228     void DrawCircle(wxCoord x, wxCoord y, wxCoord radius)
 229         { DoDrawEllipse(x - radius, y - radius, 2*radius, 2*radius); }
 230     void DrawEllipse(wxCoord x, wxCoord y, wxCoord width, wxCoord height)
 231         { DoDrawEllipse(x, y, width, height); }
 232     void DrawEllipse(const wxPoint& pt, const wxSize& sz)
 233         { DoDrawEllipse(pt.x, pt.y, sz.x, sz.y); }
 234     void DrawEllipse(const wxRect& rect)
 235         { DoDrawEllipse(rect.x, rect.y, rect.width, rect.height); }
 236
 237     void DrawIcon(const wxIcon& icon, wxCoord x, wxCoord y)
 238         { DoDrawIcon(icon, x, y); }
 239     void DrawIcon(const wxIcon& icon, const wxPoint& pt)
 240         { DoDrawIcon(icon, pt.x, pt.y); }
 241
 242     void DrawBitmap(const wxBitmap &bmp, wxCoord x, wxCoord y,
 243                     bool useMask = FALSE)
 244         { DoDrawBitmap(bmp, x, y, useMask); }
 245     void DrawBitmap(const wxBitmap &bmp, const wxPoint& pt,
 246                     bool useMask = FALSE)
 247         { DoDrawBitmap(bmp, pt.x, pt.y, useMask); }
 248
 249     void DrawText(const wxString& text, wxCoord x, wxCoord y)
 250         { DoDrawText(text, x, y); }
 251     void DrawText(const wxString& text, const wxPoint& pt)
 252         { DoDrawText(text, pt.x, pt.y); }
 253
 254     void DrawRotatedText(const wxString& text, wxCoord x, wxCoord y, double angle)
 255         { DoDrawRotatedText(text, x, y, angle); }
 256     void DrawRotatedText(const wxString& text, const wxPoint& pt, double angle)
 257         { DoDrawRotatedText(text, pt.x, pt.y, angle); }
 258
 259     bool Blit(wxCoord xdest, wxCoord ydest, wxCoord width, wxCoord height,
 260               wxDC *source, wxCoord xsrc, wxCoord ysrc,
 261               int rop = wxCOPY, bool useMask = FALSE)
 262     {
 263         return DoBlit(xdest, ydest, width, height,
 264                       source, xsrc, ysrc, rop, useMask);
 265     }
 266     bool Blit(const wxPoint& destPt, const wxSize& sz,
 267               wxDC *source, const wxPoint& srcPt,
 268               int rop = wxCOPY, bool useMask = FALSE)
 269     {
 270         return DoBlit(destPt.x, destPt.y, sz.x, sz.y,
 271                       source, srcPt.x, srcPt.y, rop, useMask);
 272     }
 273
 274 #if wxUSE_SPLINES
 275     // TODO: this API needs fixing (wxPointList, why (!const) "wxList *"?)
 276     void DrawSpline(wxCoord x1, wxCoord y1,
 277                     wxCoord x2, wxCoord y2,
 278                     wxCoord x3, wxCoord y3);
 279     void DrawSpline(int n, wxPoint points[]);
 280
 281     void DrawSpline(wxList *points) { DoDrawSpline(points); }
 282 #endif // wxUSE_SPLINES
 283
 284     // global DC operations
 285     // --------------------
 286
 287     virtual void Clear() = 0;
 288
 289     virtual bool StartDoc(const wxString& WXUNUSED(message)) { return TRUE; }
 290     virtual void EndDoc() { }
 291
 292     virtual void StartPage() { }
 293     virtual void EndPage() { }
 294
 295     // set objects to use for drawing
 296     // ------------------------------
 297
 298     virtual void SetFont(const wxFont& font) = 0;
 299     virtual void SetPen(const wxPen& pen) = 0;
 300     virtual void SetBrush(const wxBrush& brush) = 0;
 301     virtual void SetBackground(const wxBrush& brush) = 0;
 302     virtual void SetBackgroundMode(int mode) = 0;
 303     virtual void SetPalette(const wxPalette& palette) = 0;
 304
 305     // clipping region
 306     // ---------------
 307
 308     void SetClippingRegion(wxCoord x, wxCoord y, wxCoord width, wxCoord height)
 309         { DoSetClippingRegion(x, y, width, height); }
 310     void SetClippingRegion(const wxPoint& pt, const wxSize& sz)
 311         { DoSetClippingRegion(pt.x, pt.y, sz.x, sz.y); }
 312     void SetClippingRegion(const wxRect& rect)
 313         { DoSetClippingRegion(rect.x, rect.y, rect.width, rect.height); }
 314     void SetClippingRegion(const wxRegion& region)
 315         { DoSetClippingRegionAsRegion(region); }
 316
 317     virtual void DestroyClippingRegion() = 0;
 318
 319     void GetClippingBox(wxCoord *x, wxCoord *y, wxCoord *w, wxCoord *h) const
 320         { DoGetClippingBox(x, y, w, h); }
 321     void GetClippingBox(wxRect& rect) const
 322         {
 323           // Necessary to use intermediate variables for 16-bit compilation
 324           wxCoord x, y, w, h;
 325           DoGetClippingBox(&x, &y, &w, &h);
 326           rect.x = x; rect.y = y; rect.width = w; rect.height = h;
 327         }
 328
 329     // text extent
 330     // -----------
 331
 332     virtual wxCoord GetCharHeight() const = 0;
 333     virtual wxCoord GetCharWidth() const = 0;
 334
 335     void GetTextExtent(const wxString& string,
 336                        wxCoord *x, wxCoord *y,
 337                        wxCoord *descent = NULL,
 338                        wxCoord *externalLeading = NULL,
 339                        wxFont *theFont = NULL) const
 340         { DoGetTextExtent(string, x, y, descent, externalLeading, theFont); }
 341
 342     // size and resolution
 343     // -------------------
 344
 345     // in device units
 346     void GetSize(int *width, int *height) const
 347         { DoGetSize(width, height); }
 348     wxSize GetSize() const
 349     {
 350         int w, h;
 351         DoGetSize(&w, &h);
 352
 353         return wxSize(w, h);
 354     }
 355
 356     // in mm
 357     void GetSizeMM(int* width, int* height) const
 358         { DoGetSizeMM(width, height); }
 359     wxSize GetSizeMM() const
 360     {
 361         int w, h;
 362         DoGetSizeMM(&w, &h);
 363
 364         return wxSize(w, h);
 365     }
 366
 367     // coordinates conversions
 368     // -----------------------
 369
 370     // This group of functions does actual conversion of the input, as you'd
 371     // expect.
 372     wxCoord DeviceToLogicalX(wxCoord x) const;
 373     wxCoord DeviceToLogicalY(wxCoord y) const;
 374     wxCoord DeviceToLogicalXRel(wxCoord x) const;
 375     wxCoord DeviceToLogicalYRel(wxCoord y) const;
 376     wxCoord LogicalToDeviceX(wxCoord x) const;
 377     wxCoord LogicalToDeviceY(wxCoord y) const;
 378     wxCoord LogicalToDeviceXRel(wxCoord x) const;
 379     wxCoord LogicalToDeviceYRel(wxCoord y) const;
 380
 381     // query DC capabilities
 382     // ---------------------
 383
 384     virtual bool CanDrawBitmap() const = 0;
 385     virtual bool CanGetTextExtent() const = 0;
 386
 387     // colour depth
 388     virtual int GetDepth() const = 0;
 389
 390     // Resolution in Pixels per inch
 391     virtual wxSize GetPPI() const = 0;
 392
 393     virtual bool Ok() const { return m_ok; }
 394
 395     // accessors
 396     // ---------
 397
 398         // const...
 399     int GetBackgroundMode() const { return m_backgroundMode; }
 400     const wxBrush&  GetBackground() const { return m_backgroundBrush; }
 401     const wxBrush&  GetBrush() const { return m_brush; }
 402     const wxFont&   GetFont() const { return m_font; }
 403     const wxPen&    GetPen() const { return m_pen; }
 404     const wxColour& GetTextBackground() const { return m_textBackgroundColour; }
 405     const wxColour& GetTextForeground() const { return m_textForegroundColour; }
 406
 407         // ... and non const
 408     wxBrush&  GetBackground() { return m_backgroundBrush; }
 409     wxBrush&  GetBrush() { return m_brush; }
 410     wxFont&   GetFont() { return m_font; }
 411     wxPen&    GetPen() { return m_pen; }
 412     wxColour& GetTextBackground() { return m_textBackgroundColour; }
 413     wxColour& GetTextForeground() { return m_textForegroundColour; }
 414
 415     virtual void SetTextForeground(const wxColour& colour)
 416         { m_textForegroundColour = colour; }
 417     virtual void SetTextBackground(const wxColour& colour)
 418         { m_textBackgroundColour = colour; }
 419
 420     int GetMapMode() const { return m_mappingMode; }
 421     virtual void SetMapMode(int mode) = 0;
 422
 423     virtual void GetUserScale(double *x, double *y) const
 424     {
 425         if ( x ) *x = m_userScaleX;
 426         if ( y ) *y = m_userScaleY;
 427     }
 428     virtual void SetUserScale(double x, double y) = 0;
 429
 430     virtual void GetLogicalScale(double *x, double *y)
 431     {
 432         if ( x ) *x = m_logicalScaleX;
 433         if ( y ) *y = m_logicalScaleY;
 434     }
 435     virtual void SetLogicalScale(double x, double y)
 436     {
 437         m_logicalScaleX = x;
 438         m_logicalScaleY = y;
 439     }
 440
 441     void GetLogicalOrigin(wxCoord *x, wxCoord *y) const
 442         { DoGetLogicalOrigin(x, y); }
 443     wxPoint GetLogicalOrigin() const
 444         { wxCoord x, y; DoGetLogicalOrigin(&x, &y); return wxPoint(x, y); }
 445     virtual void SetLogicalOrigin(wxCoord x, wxCoord y) = 0;
 446
 447     void GetDeviceOrigin(wxCoord *x, wxCoord *y) const
 448         { DoGetDeviceOrigin(x, y); }
 449     wxPoint GetDeviceOrigin() const
 450         { wxCoord x, y; DoGetDeviceOrigin(&x, &y); return wxPoint(x, y); }
 451     virtual void SetDeviceOrigin(wxCoord x, wxCoord y) = 0;
 452
 453     virtual void SetAxisOrientation(bool xLeftRight, bool yBottomUp) = 0;
 454
 455     int GetLogicalFunction() const { return m_logicalFunction; }
 456     virtual void SetLogicalFunction(int function) = 0;
 457
 458     // Sometimes we need to override optimization, e.g. if other software is
 459     // drawing onto our surface and we can't be sure of who's done what.
 460     //
 461     // FIXME: is this (still) used?
 462     virtual void SetOptimization(bool WXUNUSED(opt)) { }
 463     virtual bool GetOptimization() { return FALSE; }
 464
 465     // bounding box
 466     // ------------
 467
 468     virtual void CalcBoundingBox(wxCoord x, wxCoord y)
 469     {
 470       if ( m_isBBoxValid )
 471       {
 472          if ( x < m_minX ) m_minX = x;
 473          if ( y < m_minY ) m_minY = y;
 474          if ( x > m_maxX ) m_maxX = x;
 475          if ( y > m_maxY ) m_maxY = y;
 476       }
 477       else
 478       {
 479          m_isBBoxValid = TRUE;
 480
 481          m_minX = x;
 482          m_minY = y;
 483          m_maxX = x;
 484          m_maxY = y;
 485       }
 486     }
 487
 488     void ResetBoundingBox()
 489     {
 490         m_isBBoxValid = FALSE;
 491
 492         m_minX = m_maxX = m_minY = m_maxY = 0;
 493     }
 494
 495     // Get the final bounding box of the PostScript or Metafile picture.
 496     wxCoord MinX() const { return m_minX; }
 497     wxCoord MaxX() const { return m_maxX; }
 498     wxCoord MinY() const { return m_minY; }
 499     wxCoord MaxY() const { return m_maxY; }
 500
 501     // misc old functions
 502     // ------------------
 503
 504     // for compatibility with the old code when wxCoord was long everywhere
 505 #ifndef __WIN16__
 506     void GetTextExtent(const wxString& string,
 507                        long *x, long *y,
 508                        long *descent = NULL,
 509                        long *externalLeading = NULL,
 510                        wxFont *theFont = NULL) const
 511     {
 512         wxCoord x2, y2, descent2, externalLeading2;
 513         DoGetTextExtent(string, &x2, &y2,
 514                         &descent2, &externalLeading2,
 515                         theFont);
 516         if ( x )
 517             *x = x2;
 518         if ( y )
 519             *y = y2;
 520         if ( descent )
 521             *descent = descent2;
 522         if ( externalLeading )
 523             *externalLeading = externalLeading2;
 524     }
 525
 526     void GetLogicalOrigin(long *x, long *y) const
 527     {
 528         wxCoord x2, y2;
 529         DoGetLogicalOrigin(&x2, &y2);
 530         if ( x )
 531             *x = x2;
 532         if ( y )
 533             *y = y2;
 534     }
 535
 536     void GetDeviceOrigin(long *x, long *y) const
 537     {
 538         wxCoord x2, y2;
 539         DoGetDeviceOrigin(&x2, &y2);
 540         if ( x )
 541             *x = x2;
 542         if ( y )
 543             *y = y2;
 544     }
 545     void GetClippingBox(long *x, long *y, long *w, long *h) const
 546     {
 547         wxCoord xx,yy,ww,hh;
 548         DoGetClippingBox(&xx, &yy, &ww, &hh);
 549         if (x) *x = xx;
 550         if (y) *y = yy;
 551         if (w) *w = ww;
 552         if (h) *h = hh;
 553     }
 554 #endif // !Win16
 555
 556 #if WXWIN_COMPATIBILITY
 557     virtual void SetColourMap(const wxPalette& palette) { SetPalette(palette); }
 558     void GetTextExtent(const wxString& string, float *x, float *y,
 559             float *descent = NULL, float *externalLeading = NULL,
 560             wxFont *theFont = NULL, bool use16bit = FALSE) const ;
 561     void GetSize(float* width, float* height) const { int w, h; GetSize(& w, & h); *width = w; *height = h; }
 562     void GetSizeMM(float *width, float *height) const { long w, h; GetSizeMM(& w, & h); *width = (float) w; *height = (float) h; }
 563 #endif // WXWIN_COMPATIBILITY
 564
 565 protected:
 566     // the pure virtual functions which should be implemented by wxDC
 567     virtual void DoFloodFill(wxCoord x, wxCoord y, const wxColour& col,
 568                              int style = wxFLOOD_SURFACE) = 0;
 569
 570     virtual bool DoGetPixel(wxCoord x, wxCoord y, wxColour *col) const = 0;
 571
 572     virtual void DoDrawPoint(wxCoord x, wxCoord y) = 0;
 573     virtual void DoDrawLine(wxCoord x1, wxCoord y1, wxCoord x2, wxCoord y2) = 0;
 574
 575     virtual void DoDrawArc(wxCoord x1, wxCoord y1,
 576                            wxCoord x2, wxCoord y2,
 577                            wxCoord xc, wxCoord yc) = 0;
 578     virtual void DoDrawCheckMark(wxCoord x, wxCoord y,
 579                                  wxCoord width, wxCoord height);
 580     virtual void DoDrawEllipticArc(wxCoord x, wxCoord y, wxCoord w, wxCoord h,
 581                                    double sa, double ea) = 0;
 582
 583     virtual void DoDrawRectangle(wxCoord x, wxCoord y, wxCoord width, wxCoord height) = 0;
 584     virtual void DoDrawRoundedRectangle(wxCoord x, wxCoord y,
 585                                         wxCoord width, wxCoord height,
 586                                         double radius) = 0;
 587     virtual void DoDrawEllipse(wxCoord x, wxCoord y,
 588                                wxCoord width, wxCoord height) = 0;
 589
 590     virtual void DoCrossHair(wxCoord x, wxCoord y) = 0;
 591
 592     virtual void DoDrawIcon(const wxIcon& icon, wxCoord x, wxCoord y) = 0;
 593     virtual void DoDrawBitmap(const wxBitmap &bmp, wxCoord x, wxCoord y,
 594                               bool useMask = FALSE) = 0;
 595
 596     virtual void DoDrawText(const wxString& text, wxCoord x, wxCoord y) = 0;
 597     virtual void DoDrawRotatedText(const wxString& text,
 598                                    wxCoord x, wxCoord y, double angle) = 0;
 599
 600     virtual bool DoBlit(wxCoord xdest, wxCoord ydest,
 601                         wxCoord width, wxCoord height,
 602                         wxDC *source, wxCoord xsrc, wxCoord ysrc,
 603                         int rop = wxCOPY, bool useMask = FALSE) = 0;
 604
 605     virtual void DoGetSize(int *width, int *height) const = 0;
 606     virtual void DoGetSizeMM(int* width, int* height) const = 0;
 607
 608     virtual void DoDrawLines(int n, wxPoint points[],
 609                              wxCoord xoffset, wxCoord yoffset) = 0;
 610     virtual void DoDrawPolygon(int n, wxPoint points[],
 611                                wxCoord xoffset, wxCoord yoffset,
 612                                int fillStyle = wxODDEVEN_RULE) = 0;
 613
 614     virtual void DoSetClippingRegionAsRegion(const wxRegion& region) = 0;
 615     virtual void DoSetClippingRegion(wxCoord x, wxCoord y,
 616                                      wxCoord width, wxCoord height) = 0;
 617
 618     // FIXME are these functions really different?
 619     virtual void DoGetClippingRegion(wxCoord *x, wxCoord *y,
 620                                      wxCoord *w, wxCoord *h)
 621         { DoGetClippingBox(x, y, w, h); }
 622     virtual void DoGetClippingBox(wxCoord *x, wxCoord *y,
 623                                   wxCoord *w, wxCoord *h) const
 624     {
 625         if ( m_clipping )
 626         {
 627             if ( x ) *x = m_clipX1;
 628             if ( y ) *y = m_clipY1;
 629             if ( w ) *w = m_clipX2 - m_clipX1;
 630             if ( h ) *h = m_clipY2 - m_clipY1;
 631         }
 632         else
 633         {
 634             *x = *y = *w = *h = 0;
 635         }
 636     }
 637
 638     virtual void DoGetLogicalOrigin(wxCoord *x, wxCoord *y) const
 639     {
 640         if ( x ) *x = m_logicalOriginX;
 641         if ( y ) *y = m_logicalOriginY;
 642     }
 643
 644     virtual void DoGetDeviceOrigin(wxCoord *x, wxCoord *y) const
 645     {
 646         if ( x ) *x = m_deviceOriginX;
 647         if ( y ) *y = m_deviceOriginY;
 648     }
 649
 650     virtual void DoGetTextExtent(const wxString& string,
 651                                  wxCoord *x, wxCoord *y,
 652                                  wxCoord *descent = NULL,
 653                                  wxCoord *externalLeading = NULL,
 654                                  wxFont *theFont = NULL) const = 0;
 655
 656 #if wxUSE_SPLINES
 657     virtual void DoDrawSpline(wxList *points) = 0;
 658 #endif
 659
 660 protected:
 661     // flags
 662     bool m_colour:1;
 663     bool m_ok:1;
 664     bool m_clipping:1;
 665     bool m_isInteractive:1;
 666     bool m_isBBoxValid:1;
 667
 668     // coordinate system variables
 669
 670     // TODO short descriptions of what exactly they are would be nice...
 671
 672     wxCoord m_logicalOriginX, m_logicalOriginY;
 673     wxCoord m_deviceOriginX, m_deviceOriginY;
 674
 675     double m_logicalScaleX, m_logicalScaleY;
 676     double m_userScaleX, m_userScaleY;
 677     double m_scaleX, m_scaleY;
 678
 679     // Used by SetAxisOrientation() to invert the axes
 680     int m_signX, m_signY;
 681
 682     // bounding and clipping boxes
 683     wxCoord m_minX, m_minY, m_maxX, m_maxY;
 684     wxCoord m_clipX1, m_clipY1, m_clipX2, m_clipY2;
 685
 686     int m_logicalFunction;
 687     int m_backgroundMode;
 688     int m_mappingMode;
 689
 690     // GDI objects
 691     wxPen             m_pen;
 692     wxBrush           m_brush;
 693     wxBrush           m_backgroundBrush;
 694     wxColour          m_textForegroundColour;
 695     wxColour          m_textBackgroundColour;
 696     wxFont            m_font;
 697     wxPalette         m_palette;
 698
 699 private:
 700     DECLARE_NO_COPY_CLASS(wxDCBase);
 701     DECLARE_ABSTRACT_CLASS(wxDCBase)
 702 };
 703
 704 // ----------------------------------------------------------------------------
 705 // now include the declaration of wxDC class
 706 // ----------------------------------------------------------------------------
 707
 708 #if defined(__WXMSW__)
 709     #include "wx/msw/dc.h"
 710 #elif defined(__WXMOTIF__)
 711     #include "wx/motif/dc.h"
 712 #elif defined(__WXGTK__)
 713     #include "wx/gtk/dc.h"
 714 #elif defined(__WXQT__)
 715     #include "wx/qt/dc.h"
 716 #elif defined(__WXMAC__)
 717     #include "wx/mac/dc.h"
 718 #elif defined(__WXPM__)
 719     #include "wx/os2/dc.h"
 720 #elif defined(__WXSTUBS__)
 721     #include "wx/stubs/dc.h"
 722 #endif
 723
 724 #endif
 725     // _WX_DC_H_BASE_