include/wx/dc.h

   1 #ifndef _WX_DC_H_BASE_
   2 #define _WX_DC_H_BASE_
   3
   4 #ifdef __GNUG__
   5     #pragma interface "dcbase.h"
   6     #pragma implementation "dcbase.h"
   7 #endif
   8
   9 // ----------------------------------------------------------------------------
  10 // headers which we must include here
  11 // ----------------------------------------------------------------------------
  12
  13 #include "wx/object.h"          // the base class
  14
  15 #include "wx/cursor.h"          // we have member variables of these classes
  16 #include "wx/font.h"            // so we can't do without them
  17 #include "wx/colour.h"
  18 #include "wx/brush.h"
  19 #include "wx/pen.h"
  20 #include "wx/palette.h"
  21
  22 #include "wx/list.h"            // we use wxList in inline functions
  23
  24 // ---------------------------------------------------------------------------
  25 // types
  26 // ---------------------------------------------------------------------------
  27
  28 // type which should be used (whenever possible, i.e. as long as it doesn't
  29 // break compatibility) for screen coordinates
  30 typedef int wxCoord;
  31
  32 // ---------------------------------------------------------------------------
  33 // global variables
  34 // ---------------------------------------------------------------------------
  35
  36 WXDLLEXPORT_DATA(extern int) wxPageNumber;
  37
  38 // ---------------------------------------------------------------------------
  39 // wxDC is the device context - object on which any drawing is done
  40 // ---------------------------------------------------------------------------
  41
  42 class WXDLLEXPORT wxDCBase : public wxObject
  43 {
  44     DECLARE_ABSTRACT_CLASS(wxDCBase)
  45
  46 public:
  47     wxDCBase()
  48     {
  49         m_clipping = FALSE;
  50         m_ok = TRUE;
  51
  52         m_minX = m_minY = m_maxX = m_maxY = 0;
  53
  54         m_signX = m_signY = 1;
  55
  56         m_logicalOriginX = m_logicalOriginY =
  57         m_deviceOriginX = m_deviceOriginY = 0;
  58
  59         m_logicalScaleX = m_logicalScaleY =
  60         m_userScaleX = m_userScaleY =
  61         m_scaleX = m_scaleY = 1.0;
  62
  63         m_logicalFunction = -1;
  64
  65         m_backgroundMode = wxTRANSPARENT;
  66
  67         m_mappingMode = wxMM_TEXT;
  68
  69         m_backgroundBrush = *wxWHITE_BRUSH;
  70
  71         m_textForegroundColour = *wxBLACK;
  72         m_textBackgroundColour = *wxWHITE;
  73
  74         m_colour = wxColourDisplay();
  75     }
  76
  77     ~wxDCBase() { }
  78
  79     virtual void BeginDrawing() { }
  80     virtual void EndDrawing() { }
  81
  82     // graphic primitives
  83     // ------------------
  84
  85     void FloodFill(long x, long y, const wxColour& col,
  86             int style = wxFLOOD_SURFACE)
  87         { DoFloodFill(x, y, col, style); }
  88     void FloodFill(const wxPoint& pt, const wxColour& col,
  89             int style = wxFLOOD_SURFACE)
  90         { DoFloodFill(pt.x, pt.y, col, style); }
  91
  92     bool GetPixel(long x, long y, wxColour *col) const
  93         { return DoGetPixel(x, y, col); }
  94     bool GetPixel(const wxPoint& pt, wxColour *col) const
  95         { return DoGetPixel(pt.x, pt.y, col); }
  96
  97     void DrawLine(long x1, long y1, long x2, long y2)
  98         { DoDrawLine(x1, y1, x2, y2); }
  99     void DrawLine(const wxPoint& pt1, const wxPoint& pt2)
 100         { DoDrawLine(pt1.x, pt1.y, pt2.x, pt2.y); }
 101
 102     void CrossHair(long x, long y)
 103         { DoCrossHair(x, y); }
 104     void CrossHair(const wxPoint& pt)
 105         { DoCrossHair(pt.x, pt.y); }
 106
 107     void DrawArc(long x1, long y1, long x2, long y2, long xc, long yc)
 108         { DoDrawArc(x1, y1, x2, y2, xc, yc); }
 109     void DrawArc(const wxPoint& pt1, const wxPoint& pt2, const wxPoint& centre)
 110         { DoDrawArc(pt1.x, pt1.y, pt2.x, pt2.y, centre.x, centre.y); }
 111
 112     void DrawEllipticArc(long x, long y, long w, long h, double sa, double ea)
 113         { DoDrawEllipticArc(x, y, x, y, sa, ea); }
 114     void DrawEllipticArc(const wxPoint& pt, const wxSize& sz,
 115                          double sa, double ea)
 116         { DoDrawEllipticArc(pt.x, pt.y, sz.x, sz.y, sa, ea); }
 117
 118     void DrawPoint(long x, long y)
 119         { DoDrawPoint(x, y); }
 120     void DrawPoint(const wxPoint& pt)
 121         { DoDrawPoint(pt.x, pt.y); }
 122
 123     void DrawLines(int n, wxPoint points[], long xoffset = 0, long yoffset = 0)
 124         { DoDrawLines(n, points, xoffset, yoffset); }
 125     void DrawLines(const wxList *list, long xoffset = 0, long yoffset = 0)
 126     {
 127         int n = list->Number();
 128         wxPoint *points = new wxPoint[n];
 129
 130         int i = 0;
 131         for ( wxNode *node = list->First(); node; node = node->Next(), i++ )
 132         {
 133             wxPoint *point = (wxPoint *)node->Data();
 134             points[i].x = point->x;
 135             points[i].y = point->y;
 136         }
 137
 138         DoDrawLines(n, points, xoffset, yoffset);
 139
 140         delete [] points;
 141     }
 142
 143     void DrawPolygon(int n, wxPoint points[],
 144                      long xoffset = 0, long yoffset = 0,
 145                      int fillStyle = wxODDEVEN_RULE)
 146         { DoDrawPolygon(n, points, xoffset, yoffset, fillStyle); }
 147
 148     void DrawPolygon(const wxList *list,
 149                      long xoffset = 0, long yoffset = 0,
 150                      int fillStyle = wxODDEVEN_RULE)
 151     {
 152         int n = list->Number();
 153         wxPoint *points = new wxPoint[n];
 154
 155         int i = 0;
 156         for ( wxNode *node = list->First(); node; node = node->Next(), i++ )
 157         {
 158             wxPoint *point = (wxPoint *)node->Data();
 159             points[i].x = point->x;
 160             points[i].y = point->y;
 161         }
 162
 163         DoDrawPolygon(n, points, xoffset, yoffset, fillStyle);
 164
 165         delete [] points;
 166     }
 167
 168     void DrawRectangle(long x, long y, long width, long height)
 169         { DoDrawRectangle(x, y, width, height); }
 170     void DrawRectangle(const wxPoint& pt, const wxSize& sz)
 171         { DoDrawRectangle(pt.x, pt.y, sz.x, sz.y); }
 172     void DrawRectangle(const wxRect& rect)
 173         { DoDrawRectangle(rect.x, rect.y, rect.width, rect.height); }
 174
 175     void DrawRoundedRectangle(long x, long y, long width, long height,
 176                               double radius)
 177         { DoDrawRoundedRectangle(x, y, width, height, radius); }
 178     void DrawRoundedRectangle(const wxPoint& pt, const wxSize& sz,
 179                              double radius)
 180         { DoDrawRoundedRectangle(pt.x, pt.y, sz.x, sz.y, radius); }
 181     void DrawRoundedRectangle(const wxRect& r, double radius)
 182         { DoDrawRoundedRectangle(r.x, r.y, r.width, r.height, radius); }
 183
 184     void DrawEllipse(long x, long y, long width, long height)
 185         { DoDrawEllipse(x, y, width, height); }
 186     void DrawEllipse(const wxPoint& pt, const wxSize& sz)
 187         { DoDrawEllipse(pt.x, pt.y, sz.x, sz.y); }
 188     void DrawEllipse(const wxRect& rect)
 189         { DoDrawEllipse(rect.x, rect.y, rect.width, rect.height); }
 190
 191     void DrawIcon(const wxIcon& icon, long x, long y)
 192         { DoDrawIcon(icon, x, y); }
 193     void DrawIcon(const wxIcon& icon, const wxPoint& pt)
 194         { DoDrawIcon(icon, pt.x, pt.y); }
 195
 196     void DrawBitmap(const wxBitmap &bmp, long x, long y, bool useMask = FALSE)
 197         { DoDrawBitmap(bmp, x, y, useMask); }
 198     void DrawBitmap(const wxBitmap &bmp, const wxPoint& pt,
 199                     bool useMask = FALSE)
 200         { DoDrawBitmap(bmp, pt.x, pt.y, useMask); }
 201
 202     void DrawText(const wxString& text, long x, long y)
 203         { DoDrawText(text, x, y); }
 204     void DrawText(const wxString& text, const wxPoint& pt)
 205         { DoDrawText(text, pt.x, pt.y); }
 206
 207     bool Blit(long xdest, long ydest, long width, long height,
 208               wxDC *source, long xsrc, long ysrc,
 209               int rop = wxCOPY, bool useMask = FALSE)
 210     {
 211         return DoBlit(xdest, ydest, width, height,
 212                       source, xsrc, ysrc, rop, useMask);
 213     }
 214     bool Blit(const wxPoint& destPt, const wxSize& sz,
 215               wxDC *source, const wxPoint& srcPt,
 216               int rop = wxCOPY, bool useMask = FALSE)
 217     {
 218         return DoBlit(destPt.x, destPt.y, sz.x, sz.y,
 219                       source, srcPt.x, srcPt.y, rop, useMask);
 220     }
 221
 222 #if wxUSE_SPLINES
 223     // TODO: this API needs fixing (wxPointList, why (!const) "wxList *"?)
 224     void DrawSpline(long x1, long y1, long x2, long y2, long x3, long y3)
 225     {
 226         wxList point_list;
 227
 228         wxPoint *point1 = new wxPoint;
 229         point1->x = x1; point1->y = y1;
 230         point_list.Append((wxObject*)point1);
 231
 232         wxPoint *point2 = new wxPoint;
 233         point2->x = x2; point2->y = y2;
 234         point_list.Append((wxObject*)point2);
 235
 236         wxPoint *point3 = new wxPoint;
 237         point3->x = x3; point3->y = y3;
 238         point_list.Append((wxObject*)point3);
 239
 240         DrawSpline(&point_list);
 241
 242         for( wxNode *node = point_list.First(); node; node = node->Next() )
 243         {
 244             wxPoint *p = (wxPoint *)node->Data();
 245             delete p;
 246         }
 247     }
 248
 249     void DrawSpline(int n, wxPoint points[])
 250     {
 251         wxList list;
 252         for (int i =0; i < n; i++)
 253         {
 254             list.Append((wxObject*)&points[i]);
 255         }
 256
 257         DrawSpline(&list);
 258     }
 259
 260     void DrawSpline(wxList *points) { DoDrawSpline(points); }
 261 #endif // wxUSE_SPLINES
 262
 263     // global DC operations
 264     // --------------------
 265
 266     virtual void Clear() = 0;
 267
 268     virtual bool StartDoc(const wxString& message) = 0;
 269     virtual void EndDoc() = 0;
 270
 271     virtual void StartPage() = 0;
 272     virtual void EndPage() = 0;
 273
 274     // set objects to use for drawing
 275     // ------------------------------
 276
 277     virtual void SetFont(const wxFont& font) = 0;
 278     virtual void SetPen(const wxPen& pen) = 0;
 279     virtual void SetBrush(const wxBrush& brush) = 0;
 280     virtual void SetBackground(const wxBrush& brush) = 0;
 281     virtual void SetBackgroundMode(int mode) = 0;
 282     virtual void SetPalette(const wxPalette& palette) = 0;
 283
 284     // clipping region
 285     // ---------------
 286
 287     void SetClippingRegion(long x, long y, long width, long height)
 288         { DoSetClippingRegion(x, y, width, height); }
 289     void SetClippingRegion(const wxPoint& pt, const wxSize& sz)
 290         { DoSetClippingRegion(pt.x, pt.y, sz.x, sz.y); }
 291     void SetClippingRegion(const wxRect& rect)
 292         { DoSetClippingRegion(rect.x, rect.y, rect.width, rect.height); }
 293     void SetClippingRegion(const wxRegion& region)
 294         { DoSetClippingRegionAsRegion(region); }
 295
 296     virtual void DestroyClippingRegion() = 0;
 297
 298     void GetClippingBox(long *x, long *y, long *w, long *h) const
 299         { DoGetClippingBox(x, y, w, h); }
 300     void GetClippingBox(wxRect& rect) const
 301         { DoGetClippingBox(&rect.x, &rect.y, &rect.width, &rect.height); }
 302
 303     // text extent
 304     // -----------
 305
 306     virtual long GetCharHeight() const = 0;
 307     virtual long GetCharWidth() const = 0;
 308     virtual void GetTextExtent(const wxString& string,
 309                                long *x, long *y,
 310                                long *descent = NULL,
 311                                long *externalLeading = NULL,
 312                                wxFont *theFont = NULL) const = 0;
 313
 314     // size and resolution
 315     // -------------------
 316
 317     // in device units
 318     void GetSize(int *width, int *height) const
 319         { DoGetSize(width, height); }
 320     wxSize GetSize() const
 321     {
 322         int w, h;
 323         DoGetSize(&w, &h);
 324
 325         return wxSize(w, h);
 326     }
 327
 328     // in mm
 329     void GetSizeMM(int* width, int* height) const
 330         { DoGetSizeMM(width, height); }
 331     wxSize GetSizeMM() const
 332     {
 333         int w, h;
 334         DoGetSizeMM(&w, &h);
 335
 336         return wxSize(w, h);
 337     }
 338
 339     // coordinates conversions
 340     // -----------------------
 341
 342     // This group of functions does actual conversion of the input, as you'd
 343     // expect.
 344     long DeviceToLogicalX(long x) const;
 345     long DeviceToLogicalY(long y) const;
 346     long DeviceToLogicalXRel(long x) const;
 347     long DeviceToLogicalYRel(long y) const;
 348     long LogicalToDeviceX(long x) const;
 349     long LogicalToDeviceY(long y) const;
 350     long LogicalToDeviceXRel(long x) const;
 351     long LogicalToDeviceYRel(long y) const;
 352
 353     // query DC capabilities
 354     // ---------------------
 355
 356     virtual bool CanDrawBitmap() const = 0;
 357     virtual bool CanGetTextExtent() const = 0;
 358
 359     // colour depth
 360     virtual int GetDepth() const = 0;
 361
 362     // Resolution in Pixels per inch
 363     virtual wxSize GetPPI() const = 0;
 364
 365     virtual bool Ok() const { return m_ok; }
 366
 367     // accessors
 368     // ---------
 369
 370         // const...
 371     const wxBrush&  GetBackground() const { return m_backgroundBrush; }
 372     const wxBrush&  GetBrush() const { return m_brush; }
 373     const wxFont&   GetFont() const { return m_font; }
 374     const wxPen&    GetPen() const { return m_pen; }
 375     const wxColour& GetTextBackground() const { return m_textBackgroundColour; }
 376     const wxColour& GetTextForeground() const { return m_textForegroundColour; }
 377
 378         // ... and non const
 379     wxBrush&  GetBackground() { return m_backgroundBrush; }
 380     wxBrush&  GetBrush() { return m_brush; }
 381     wxFont&   GetFont() { return m_font; }
 382     wxPen&    GetPen() { return m_pen; }
 383     wxColour& GetTextBackground() { return m_textBackgroundColour; }
 384     wxColour& GetTextForeground() { return m_textForegroundColour; }
 385
 386     virtual void SetTextForeground(const wxColour& colour)
 387         { m_textForegroundColour = colour; }
 388     virtual void SetTextBackground(const wxColour& colour)
 389         { m_textBackgroundColour = colour; }
 390
 391     int GetMapMode() const { return m_mappingMode; }
 392     virtual void SetMapMode(int mode) = 0;
 393
 394     virtual void GetUserScale(double *x, double *y) const
 395     {
 396         if ( x ) *x = m_userScaleX;
 397         if ( y ) *y = m_userScaleY;
 398     }
 399     void SetSystemScale(double x, double y)
 400         { SetUserScale(x, y); }
 401     virtual void SetUserScale(double x, double y) = 0;
 402
 403     virtual void GetLogicalScale(double *x, double *y)
 404     {
 405         if ( x ) *x = m_logicalScaleX;
 406         if ( y ) *y = m_logicalScaleY;
 407     }
 408     virtual void SetLogicalScale(double x, double y)
 409     {
 410         m_logicalScaleX = x;
 411         m_logicalScaleY = y;
 412     }
 413
 414     void GetLogicalOrigin(long *x, long *y) const
 415         { DoGetLogicalOrigin(x, y); }
 416     wxPoint GetLogicalOrigin() const
 417         { long x, y; DoGetLogicalOrigin(&x, &y); return wxPoint(x, y); }
 418     virtual void SetLogicalOrigin(long x, long y) = 0;
 419
 420     void GetDeviceOrigin(long *x, long *y) const
 421         { DoGetDeviceOrigin(x, y); }
 422     wxPoint GetDeviceOrigin() const
 423         { long x, y; DoGetDeviceOrigin(&x, &y); return wxPoint(x, y); }
 424     virtual void SetDeviceOrigin(long x, long y) = 0;
 425
 426     virtual void SetAxisOrientation(bool xLeftRight, bool yBottomUp) = 0;
 427
 428     int GetLogicalFunction() const { return m_logicalFunction; }
 429     virtual void SetLogicalFunction(int function) = 0;
 430
 431     // Sometimes we need to override optimization, e.g. if other software is
 432     // drawing onto our surface and we can't be sure of who's done what.
 433     //
 434     // FIXME: is this (still) used?
 435     virtual void SetOptimization(bool WXUNUSED(opt)) { }
 436     virtual bool GetOptimization() { return FALSE; }
 437
 438     // bounding box
 439     // ------------
 440
 441     virtual void CalcBoundingBox(long x, long y)
 442     {
 443         if (x < m_minX) m_minX = x;
 444         if (y < m_minY) m_minY = y;
 445         if (x > m_maxX) m_maxX = x;
 446         if (y > m_maxY) m_maxY = y;
 447     }
 448
 449     // Get the final bounding box of the PostScript or Metafile picture.
 450     long MinX() const { return m_minX; }
 451     long MaxX() const { return m_maxX; }
 452     long MinY() const { return m_minY; }
 453     long MaxY() const { return m_maxY; }
 454
 455     // misc old functions
 456     // ------------------
 457
 458 #if WXWIN_COMPATIBILITY
 459     virtual void SetColourMap(const wxPalette& palette) { SetPalette(palette); }
 460     void GetTextExtent(const wxString& string, float *x, float *y,
 461             float *descent = NULL, float *externalLeading = NULL,
 462             wxFont *theFont = NULL, bool use16bit = FALSE) const ;
 463     void GetSize(float* width, float* height) const { int w, h; GetSize(& w, & h); *width = w; *height = h; }
 464     void GetSizeMM(float *width, float *height) const { long w, h; GetSizeMM(& w, & h); *width = (float) w; *height = (float) h; }
 465 #endif // WXWIN_COMPATIBILITY
 466
 467 protected:
 468     // the pure virtual functions which should be implemented by wxDC
 469     virtual void DoFloodFill(long x, long y, const wxColour& col,
 470                              int style = wxFLOOD_SURFACE) = 0;
 471
 472     virtual bool DoGetPixel(long x, long y, wxColour *col) const = 0;
 473
 474     virtual void DoDrawPoint(long x, long y) = 0;
 475     virtual void DoDrawLine(long x1, long y1, long x2, long y2) = 0;
 476
 477     virtual void DoDrawArc(long x1, long y1,
 478                            long x2, long y2,
 479                            long xc, long yc) = 0;
 480     virtual void DoDrawEllipticArc(long x, long y, long w, long h,
 481                                    double sa, double ea) = 0;
 482
 483     virtual void DoDrawRectangle(long x, long y, long width, long height) = 0;
 484     virtual void DoDrawRoundedRectangle(long x, long y,
 485                                         long width, long height,
 486                                         double radius) = 0;
 487     virtual void DoDrawEllipse(long x, long y, long width, long height) = 0;
 488
 489     virtual void DoCrossHair(long x, long y) = 0;
 490
 491     virtual void DoDrawIcon(const wxIcon& icon, long x, long y) = 0;
 492     virtual void DoDrawBitmap(const wxBitmap &bmp, long x, long y,
 493                               bool useMask = FALSE) = 0;
 494
 495     virtual void DoDrawText(const wxString& text, long x, long y) = 0;
 496
 497     virtual bool DoBlit(long xdest, long ydest, long width, long height,
 498                         wxDC *source, long xsrc, long ysrc,
 499                         int rop = wxCOPY, bool useMask = FALSE) = 0;
 500
 501     virtual void DoGetSize(int *width, int *height) const = 0;
 502     virtual void DoGetSizeMM(int* width, int* height) const = 0;
 503
 504     virtual void DoDrawLines(int n, wxPoint points[],
 505                              long xoffset, long yoffset) = 0;
 506     virtual void DoDrawPolygon(int n, wxPoint points[],
 507                                long xoffset, long yoffset,
 508                                int fillStyle = wxODDEVEN_RULE) = 0;
 509
 510     virtual void DoSetClippingRegionAsRegion(const wxRegion& region) = 0;
 511     virtual void DoSetClippingRegion(long x, long y,
 512                                      long width, long height) = 0;
 513
 514     // FIXME are these functions really different?
 515     virtual void DoGetClippingRegion(long *x, long *y,
 516                                      long *w, long *h)
 517         { DoGetClippingBox(x, y, w, h); }
 518     virtual void DoGetClippingBox(long *x, long *y,
 519                                   long *w, long *h) const
 520     {
 521         if ( m_clipping )
 522         {
 523             if ( x ) *x = m_clipX1;
 524             if ( y ) *y = m_clipY1;
 525             if ( w ) *w = m_clipX2 - m_clipX1;
 526             if ( h ) *h = m_clipY2 - m_clipY1;
 527         }
 528         else
 529         {
 530             *x = *y = *w = *h = 0;
 531         }
 532     }
 533
 534     virtual void DoGetLogicalOrigin(long *x, long *y) const
 535     {
 536         if ( x ) *x = m_logicalOriginX;
 537         if ( y ) *y = m_logicalOriginY;
 538     }
 539
 540     virtual void DoGetDeviceOrigin(long *x, long *y) const
 541     {
 542         if ( x ) *x = m_deviceOriginX;
 543         if ( y ) *y = m_deviceOriginY;
 544     }
 545
 546 #if wxUSE_SPLINES
 547     virtual void DoDrawSpline(wxList *points) = 0;
 548 #endif
 549
 550 protected:
 551     // flags
 552     bool m_colour:1;
 553     bool m_ok:1;
 554     bool m_clipping:1;
 555     bool m_isInteractive:1;
 556
 557     // coordinate system variables
 558
 559     // TODO short descriptions of what exactly they are would be nice...
 560
 561     long m_logicalOriginX, m_logicalOriginY;
 562     long m_deviceOriginX, m_deviceOriginY;
 563
 564     double m_logicalScaleX, m_logicalScaleY;
 565     double m_userScaleX, m_userScaleY;
 566     double m_scaleX, m_scaleY;
 567
 568     // Used by SetAxisOrientation() to invert the axes
 569     int m_signX, m_signY;
 570
 571     // bounding and clipping boxes
 572     long m_minX, m_minY, m_maxX, m_maxY;
 573     long m_clipX1, m_clipY1, m_clipX2, m_clipY2;
 574
 575     int m_logicalFunction;
 576     int m_backgroundMode;
 577     int m_mappingMode;
 578
 579     // GDI objects
 580     wxPen             m_pen;
 581     wxBrush           m_brush;
 582     wxBrush           m_backgroundBrush;
 583     wxColour          m_textForegroundColour;
 584     wxColour          m_textBackgroundColour;
 585     wxFont            m_font;
 586     wxPalette         m_palette;
 587
 588 private:
 589     DECLARE_NO_COPY_CLASS(wxDCBase);
 590 };
 591
 592 // ----------------------------------------------------------------------------
 593 // now include the declaration of wxDC class
 594 // ----------------------------------------------------------------------------
 595
 596 #if defined(__WXMSW__)
 597     #include "wx/msw/dc.h"
 598 #elif defined(__WXMOTIF__)
 599     #include "wx/motif/dc.h"
 600 #elif defined(__WXGTK__)
 601     #include "wx/gtk/dc.h"
 602 #elif defined(__WXQT__)
 603     #include "wx/qt/dc.h"
 604 #elif defined(__WXMAC__)
 605     #include "wx/mac/dc.h"
 606 #elif defined(__WXSTUBS__)
 607     #include "wx/stubs/dc.h"
 608 #endif
 609
 610 #endif
 611     // _WX_DC_H_BASE_