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