include/wx/dc.h

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        wx/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) wxWidgets team
   9 // Licence:     wxWindows licence
  10 /////////////////////////////////////////////////////////////////////////////
  11
  12 #ifndef _WX_DC_H_BASE_
  13 #define _WX_DC_H_BASE_
  14
  15 // ----------------------------------------------------------------------------
  16 // headers which we must include here
  17 // ----------------------------------------------------------------------------
  18
  19 #include "wx/object.h"          // the base class
  20
  21 #include "wx/intl.h"            // for wxLayoutDirection
  22 #include "wx/cursor.h"          // we have member variables of these classes
  23 #include "wx/font.h"            // so we can't do without them
  24 #include "wx/colour.h"
  25 #include "wx/bitmap.h"          // for wxNullBitmap
  26 #include "wx/brush.h"
  27 #include "wx/pen.h"
  28 #include "wx/palette.h"
  29 #include "wx/dynarray.h"
  30 #include "wx/math.h"
  31 #include "wx/image.h"
  32 #include "wx/cmndata.h"
  33
  34 #define wxUSE_NEW_DC 1
  35
  36 class WXDLLIMPEXP_FWD_CORE wxDC;
  37 class WXDLLIMPEXP_FWD_CORE wxClientDC;
  38 class WXDLLIMPEXP_FWD_CORE wxPaintDC;
  39 class WXDLLIMPEXP_FWD_CORE wxWindowDC;
  40 class WXDLLIMPEXP_FWD_CORE wxScreenDC;
  41 class WXDLLIMPEXP_FWD_CORE wxMemoryDC;
  42 class WXDLLIMPEXP_FWD_CORE wxPrinterDC;
  43
  44 //-----------------------------------------------------------------------------
  45 // wxDrawObject helper class
  46 //-----------------------------------------------------------------------------
  47
  48 class WXDLLEXPORT wxDrawObject
  49 {
  50 public:
  51
  52     wxDrawObject()
  53         : m_isBBoxValid(false)
  54         , m_minX(0), m_minY(0), m_maxX(0), m_maxY(0)
  55     { }
  56
  57     virtual ~wxDrawObject() { }
  58
  59     virtual void Draw(wxDC&) const { }
  60
  61     virtual void CalcBoundingBox(wxCoord x, wxCoord y)
  62     {
  63       if ( m_isBBoxValid )
  64       {
  65          if ( x < m_minX ) m_minX = x;
  66          if ( y < m_minY ) m_minY = y;
  67          if ( x > m_maxX ) m_maxX = x;
  68          if ( y > m_maxY ) m_maxY = y;
  69       }
  70       else
  71       {
  72          m_isBBoxValid = true;
  73
  74          m_minX = x;
  75          m_minY = y;
  76          m_maxX = x;
  77          m_maxY = y;
  78       }
  79     }
  80
  81     void ResetBoundingBox()
  82     {
  83         m_isBBoxValid = false;
  84
  85         m_minX = m_maxX = m_minY = m_maxY = 0;
  86     }
  87
  88     // Get the final bounding box of the PostScript or Metafile picture.
  89
  90     wxCoord MinX() const { return m_minX; }
  91     wxCoord MaxX() const { return m_maxX; }
  92     wxCoord MinY() const { return m_minY; }
  93     wxCoord MaxY() const { return m_maxY; }
  94
  95     //to define the type of object for derived objects
  96     virtual int GetType()=0;
  97
  98 protected:
  99     //for boundingbox calculation
 100     bool m_isBBoxValid:1;
 101     //for boundingbox calculation
 102     wxCoord m_minX, m_minY, m_maxX, m_maxY;
 103 };
 104
 105
 106 //-----------------------------------------------------------------------------
 107 // wxDCFactory
 108 //-----------------------------------------------------------------------------
 109
 110 class WXDLLIMPEXP_FWD_CORE wxDCImpl;
 111
 112 class WXDLLIMPEXP_CORE wxDCFactory
 113 {
 114 public:
 115     wxDCFactory() {}
 116     virtual ~wxDCFactory() {}
 117
 118     virtual wxDCImpl* CreateWindowDC( wxWindowDC *owner ) = 0;
 119     virtual wxDCImpl* CreateWindowDC( wxWindowDC *owner, wxWindow *window ) = 0;
 120     virtual wxDCImpl* CreateClientDC( wxClientDC *owner ) = 0;
 121     virtual wxDCImpl* CreateClientDC( wxClientDC *owner, wxWindow *window ) = 0;
 122     virtual wxDCImpl* CreatePaintDC( wxPaintDC *owner ) = 0;
 123     virtual wxDCImpl* CreatePaintDC( wxPaintDC *owner, wxWindow *window ) = 0;
 124     virtual wxDCImpl* CreateMemoryDC( wxMemoryDC *owner ) = 0;
 125     virtual wxDCImpl* CreateMemoryDC( wxMemoryDC *owner, wxBitmap &bitmap ) = 0;
 126     virtual wxDCImpl* CreateMemoryDC( wxMemoryDC *owner, wxDC *dc ) = 0;
 127     virtual wxDCImpl* CreateScreenDC( wxScreenDC *owner ) = 0;
 128     virtual wxDCImpl* CreatePrinterDC( wxPrinterDC *owner, const wxPrintData &data  ) = 0;
 129
 130     static void SetDCFactory( wxDCFactory *factory );
 131     static wxDCFactory *GetFactory();
 132 private:
 133     static wxDCFactory *m_factory;
 134 };
 135
 136 //-----------------------------------------------------------------------------
 137 // wxNativeDCFactory
 138 //-----------------------------------------------------------------------------
 139
 140 class WXDLLIMPEXP_CORE wxNativeDCFactory: public wxDCFactory
 141 {
 142 public:
 143     wxNativeDCFactory() {}
 144
 145     virtual wxDCImpl* CreateWindowDC( wxWindowDC *owner );
 146     virtual wxDCImpl* CreateWindowDC( wxWindowDC *owner, wxWindow *window );
 147     virtual wxDCImpl* CreateClientDC( wxClientDC *owner );
 148     virtual wxDCImpl* CreateClientDC( wxClientDC *owner, wxWindow *window );
 149     virtual wxDCImpl* CreatePaintDC( wxPaintDC *owner );
 150     virtual wxDCImpl* CreatePaintDC( wxPaintDC *owner, wxWindow *window );
 151     virtual wxDCImpl* CreateMemoryDC( wxMemoryDC *owner );
 152     virtual wxDCImpl* CreateMemoryDC( wxMemoryDC *owner, wxBitmap &bitmap );
 153     virtual wxDCImpl* CreateMemoryDC( wxMemoryDC *owner, wxDC *dc );
 154     virtual wxDCImpl* CreateScreenDC( wxScreenDC *owner );
 155     virtual wxDCImpl* CreatePrinterDC( wxPrinterDC *owner, const wxPrintData &data  );
 156 };
 157
 158 //-----------------------------------------------------------------------------
 159 // wxDCImpl
 160 //-----------------------------------------------------------------------------
 161
 162 class WXDLLIMPEXP_CORE wxDCImpl: public wxObject
 163 {
 164 public:
 165     wxDCImpl( wxDC *owner );
 166     ~wxDCImpl();
 167
 168     wxDC *GetOwner() const { return m_owner; }
 169
 170     wxWindow* GetWindow() const { return m_window; }
 171
 172     virtual bool IsOk() const { return m_ok; }
 173
 174     // query capabilities
 175
 176     virtual bool CanDrawBitmap() const = 0;
 177     virtual bool CanGetTextExtent() const = 0;
 178
 179     // query dimension, colour deps, resolution
 180
 181     virtual void DoGetSize(int *width, int *height) const = 0;
 182     virtual void DoGetSizeMM(int* width, int* height) const = 0;
 183
 184     virtual int GetDepth() const = 0;
 185     virtual wxSize GetPPI() const = 0;
 186
 187     // Right-To-Left (RTL) modes
 188
 189     virtual void SetLayoutDirection(wxLayoutDirection WXUNUSED(dir)) { }
 190     virtual wxLayoutDirection GetLayoutDirection() const  { return wxLayout_Default; }
 191
 192     // page and document
 193
 194     virtual bool StartDoc(const wxString& WXUNUSED(message)) { return true; }
 195     virtual void EndDoc() { }
 196
 197     virtual void StartPage() { }
 198     virtual void EndPage() { }
 199
 200     // flushing the content of this dc immediately eg onto screen
 201     virtual void Flush() { }
 202
 203     // bounding box
 204
 205     virtual void CalcBoundingBox(wxCoord x, wxCoord y)
 206     {
 207       if ( m_isBBoxValid )
 208       {
 209          if ( x < m_minX ) m_minX = x;
 210          if ( y < m_minY ) m_minY = y;
 211          if ( x > m_maxX ) m_maxX = x;
 212          if ( y > m_maxY ) m_maxY = y;
 213       }
 214       else
 215       {
 216          m_isBBoxValid = true;
 217
 218          m_minX = x;
 219          m_minY = y;
 220          m_maxX = x;
 221          m_maxY = y;
 222       }
 223     }
 224     void ResetBoundingBox()
 225     {
 226         m_isBBoxValid = false;
 227
 228         m_minX = m_maxX = m_minY = m_maxY = 0;
 229     }
 230
 231     wxCoord MinX() const { return m_minX; }
 232     wxCoord MaxX() const { return m_maxX; }
 233     wxCoord MinY() const { return m_minY; }
 234     wxCoord MaxY() const { return m_maxY; }
 235
 236     // setters and getters
 237
 238     virtual void SetFont(const wxFont& font) = 0;
 239     virtual const wxFont&   GetFont() const { return m_font; }
 240
 241     virtual void SetPen(const wxPen& pen) = 0;
 242     virtual const wxPen&    GetPen() const { return m_pen; }
 243
 244     virtual void SetBrush(const wxBrush& brush) = 0;
 245     virtual const wxBrush&  GetBrush() const { return m_brush; }
 246
 247     virtual void SetBackground(const wxBrush& brush) = 0;
 248     virtual const wxBrush&  GetBackground() const { return m_backgroundBrush; }
 249
 250     virtual void SetBackgroundMode(int mode) = 0;
 251     virtual int GetBackgroundMode() const { return m_backgroundMode; }
 252
 253     virtual void SetTextForeground(const wxColour& colour)
 254         { m_textForegroundColour = colour; }
 255     virtual const wxColour& GetTextForeground() const { return m_textForegroundColour; }
 256
 257     virtual void SetTextBackground(const wxColour& colour)
 258         { m_textBackgroundColour = colour; }
 259     virtual const wxColour& GetTextBackground() const { return m_textBackgroundColour; }
 260
 261 #if wxUSE_PALETTE
 262     virtual void SetPalette(const wxPalette& palette) = 0;
 263 #endif // wxUSE_PALETTE
 264
 265     // logical functions
 266
 267     virtual void SetLogicalFunction(int function) = 0;
 268     virtual int GetLogicalFunction() const { return m_logicalFunction; }
 269
 270     // text measurement
 271
 272     virtual wxCoord GetCharHeight() const = 0;
 273     virtual wxCoord GetCharWidth() const = 0;
 274     virtual void DoGetTextExtent(const wxString& string,
 275                                  wxCoord *x, wxCoord *y,
 276                                  wxCoord *descent = NULL,
 277                                  wxCoord *externalLeading = NULL,
 278                                  const wxFont *theFont = NULL) const = 0;
 279     virtual void GetMultiLineTextExtent(const wxString& string,
 280                                         wxCoord *width,
 281                                         wxCoord *height,
 282                                         wxCoord *heightLine = NULL,
 283                                         const wxFont *font = NULL) const;
 284     virtual bool DoGetPartialTextExtents(const wxString& text, wxArrayInt& widths) const;
 285
 286     // clearing
 287
 288     virtual void Clear() = 0;
 289
 290     // clipping
 291
 292     virtual void DoSetClippingRegion(wxCoord x, wxCoord y,
 293                                      wxCoord width, wxCoord height) = 0;
 294     virtual void DoSetClippingRegionAsRegion(const wxRegion& region) = 0;
 295
 296     virtual void DoGetClippingBox(wxCoord *x, wxCoord *y,
 297                                   wxCoord *w, wxCoord *h) const
 298     {
 299         if ( x )
 300             *x = m_clipX1;
 301         if ( y )
 302             *y = m_clipY1;
 303         if ( w )
 304             *w = m_clipX2 - m_clipX1;
 305         if ( h )
 306             *h = m_clipY2 - m_clipY1;
 307     }
 308
 309     virtual void DestroyClippingRegion() { ResetClipping(); }
 310
 311
 312     // coordinates conversions and transforms
 313
 314     virtual wxCoord DeviceToLogicalX(wxCoord x) const;
 315     virtual wxCoord DeviceToLogicalY(wxCoord y) const;
 316     virtual wxCoord DeviceToLogicalXRel(wxCoord x) const;
 317     virtual wxCoord DeviceToLogicalYRel(wxCoord y) const;
 318     virtual wxCoord LogicalToDeviceX(wxCoord x) const;
 319     virtual wxCoord LogicalToDeviceY(wxCoord y) const;
 320     virtual wxCoord LogicalToDeviceXRel(wxCoord x) const;
 321     virtual wxCoord LogicalToDeviceYRel(wxCoord y) const;
 322
 323     virtual void SetMapMode(int mode);
 324     virtual int GetMapMode() const { return m_mappingMode; }
 325
 326     virtual void SetUserScale(double x, double y);
 327     virtual void GetUserScale(double *x, double *y) const
 328     {
 329         if ( x ) *x = m_userScaleX;
 330         if ( y ) *y = m_userScaleY;
 331     }
 332
 333     virtual void SetLogicalScale(double x, double y);
 334     virtual void GetLogicalScale(double *x, double *y)
 335     {
 336         if ( x ) *x = m_logicalScaleX;
 337         if ( y ) *y = m_logicalScaleY;
 338     }
 339
 340     virtual void SetLogicalOrigin(wxCoord x, wxCoord y);
 341     virtual void DoGetLogicalOrigin(wxCoord *x, wxCoord *y) const
 342     {
 343         if ( x ) *x = m_logicalOriginX;
 344         if ( y ) *y = m_logicalOriginY;
 345     }
 346
 347     virtual void SetDeviceOrigin(wxCoord x, wxCoord y);
 348     virtual void DoGetDeviceOrigin(wxCoord *x, wxCoord *y) const
 349     {
 350         if ( x ) *x = m_deviceOriginX;
 351         if ( y ) *y = m_deviceOriginY;
 352     }
 353
 354     virtual void SetDeviceLocalOrigin( wxCoord x, wxCoord y );
 355
 356     virtual void ComputeScaleAndOrigin();
 357
 358     // this needs to overidden if the axis is inverted
 359     virtual void SetAxisOrientation(bool xLeftRight, bool yBottomUp);
 360
 361     // ---------------------------------------------------------
 362     // the actual drawing API
 363
 364     virtual bool DoFloodFill(wxCoord x, wxCoord y, const wxColour& col,
 365                              int style = wxFLOOD_SURFACE) = 0;
 366
 367     virtual void DoGradientFillLinear(const wxRect& rect,
 368                                       const wxColour& initialColour,
 369                                       const wxColour& destColour,
 370                                       wxDirection nDirection = wxEAST);
 371
 372     virtual void DoGradientFillConcentric(const wxRect& rect,
 373                                         const wxColour& initialColour,
 374                                         const wxColour& destColour,
 375                                         const wxPoint& circleCenter);
 376
 377     virtual bool DoGetPixel(wxCoord x, wxCoord y, wxColour *col) const = 0;
 378
 379     virtual void DoDrawPoint(wxCoord x, wxCoord y) = 0;
 380     virtual void DoDrawLine(wxCoord x1, wxCoord y1, wxCoord x2, wxCoord y2) = 0;
 381
 382     virtual void DoDrawArc(wxCoord x1, wxCoord y1,
 383                            wxCoord x2, wxCoord y2,
 384                            wxCoord xc, wxCoord yc) = 0;
 385     virtual void DoDrawCheckMark(wxCoord x, wxCoord y,
 386                                  wxCoord width, wxCoord height);
 387     virtual void DoDrawEllipticArc(wxCoord x, wxCoord y, wxCoord w, wxCoord h,
 388                                    double sa, double ea) = 0;
 389
 390     virtual void DoDrawRectangle(wxCoord x, wxCoord y, wxCoord width, wxCoord height) = 0;
 391     virtual void DoDrawRoundedRectangle(wxCoord x, wxCoord y,
 392                                         wxCoord width, wxCoord height,
 393                                         double radius) = 0;
 394     virtual void DoDrawEllipse(wxCoord x, wxCoord y,
 395                                wxCoord width, wxCoord height) = 0;
 396
 397     virtual void DoCrossHair(wxCoord x, wxCoord y) = 0;
 398
 399     virtual void DoDrawIcon(const wxIcon& icon, wxCoord x, wxCoord y) = 0;
 400     virtual void DoDrawBitmap(const wxBitmap &bmp, wxCoord x, wxCoord y,
 401                               bool useMask = false) = 0;
 402
 403     virtual void DoDrawText(const wxString& text, wxCoord x, wxCoord y) = 0;
 404     virtual void DoDrawRotatedText(const wxString& text,
 405                                    wxCoord x, wxCoord y, double angle) = 0;
 406
 407     virtual bool DoBlit(wxCoord xdest, wxCoord ydest,
 408                         wxCoord width, wxCoord height,
 409                         wxDC *source,
 410                         wxCoord xsrc, wxCoord ysrc,
 411                         int rop = wxCOPY,
 412                         bool useMask = false,
 413                         wxCoord xsrcMask = wxDefaultCoord,
 414                         wxCoord ysrcMask = wxDefaultCoord) = 0;
 415
 416     virtual bool DoStretchBlit(wxCoord xdest, wxCoord ydest,
 417                                wxCoord dstWidth, wxCoord dstHeight,
 418                                wxDC *source,
 419                                wxCoord xsrc, wxCoord ysrc,
 420                                wxCoord srcWidth, wxCoord srcHeight,
 421                                int rop = wxCOPY,
 422                                bool useMask = false,
 423                                wxCoord xsrcMask = wxDefaultCoord,
 424                                wxCoord ysrcMask = wxDefaultCoord);
 425
 426     virtual wxBitmap DoGetAsBitmap(const wxRect *WXUNUSED(subrect)) const
 427         { return wxNullBitmap; }
 428
 429
 430     virtual void DoDrawLines(int n, wxPoint points[],
 431                              wxCoord xoffset, wxCoord yoffset ) = 0;
 432     virtual void DrawLines(const wxPointList *list,
 433                            wxCoord xoffset, wxCoord yoffset );
 434
 435     virtual void DoDrawPolygon(int n, wxPoint points[],
 436                                wxCoord xoffset, wxCoord yoffset,
 437                                int fillStyle = wxODDEVEN_RULE) = 0;
 438     virtual void DoDrawPolyPolygon(int n, int count[], wxPoint points[],
 439                                wxCoord xoffset, wxCoord yoffset,
 440                                int fillStyle);
 441     void DrawPolygon(const wxPointList *list,
 442                      wxCoord xoffset, wxCoord yoffset,
 443                      int fillStyle );
 444
 445
 446 #if wxUSE_SPLINES
 447     virtual void DoDrawSpline(wxCoord x1, wxCoord y1, wxCoord x2, wxCoord y2, wxCoord x3, wxCoord y3);
 448     virtual void DoDrawSpline(int n, wxPoint points[]);
 449     virtual void DoDrawSpline(const wxPointList *points);
 450 #endif
 451
 452     // ---------------------------------------------------------
 453     // wxMemoryDC Impl API
 454
 455     virtual void DoSelect(const wxBitmap& WXUNUSED(bmp))
 456        { }
 457
 458     virtual const wxBitmap& GetSelectedBitmap() const
 459         { return wxNullBitmap; }
 460     virtual wxBitmap& GetSelectedBitmap()
 461         { return wxNullBitmap; }
 462
 463     // ---------------------------------------------------------
 464     // wxPrinterDC Impl API
 465
 466     virtual wxRect GetPaperRect()
 467         { int w = 0; int h = 0; DoGetSize( &w, &h ); return wxRect(0,0,w,h); }
 468
 469     virtual int GetResolution()
 470         { return -1; }
 471
 472 private:
 473     wxDC       *m_owner;
 474
 475 protected:
 476     // unset clipping variables (after clipping region was destroyed)
 477     void ResetClipping()
 478     {
 479         m_clipping = false;
 480
 481         m_clipX1 = m_clipX2 = m_clipY1 = m_clipY2 = 0;
 482     }
 483
 484     // window on which the DC draws or NULL
 485     wxWindow   *m_window;
 486
 487     // flags
 488     bool m_colour:1;
 489     bool m_ok:1;
 490     bool m_clipping:1;
 491     bool m_isInteractive:1;
 492     bool m_isBBoxValid:1;
 493
 494     // coordinate system variables
 495
 496     wxCoord m_logicalOriginX, m_logicalOriginY;
 497     wxCoord m_deviceOriginX, m_deviceOriginY;           // Usually 0,0, can be change by user
 498
 499     wxCoord m_deviceLocalOriginX, m_deviceLocalOriginY; // non-zero if native top-left corner
 500                                                         // is not at 0,0. This was the case under
 501                                                         // Mac's GrafPorts (coordinate system
 502                                                         // used toplevel window's origin) and
 503                                                         // e.g. for Postscript, where the native
 504                                                         // origin in the bottom left corner.
 505     double m_logicalScaleX, m_logicalScaleY;
 506     double m_userScaleX, m_userScaleY;
 507     double m_scaleX, m_scaleY;  // calculated from logical scale and user scale
 508
 509     int m_signX, m_signY;  // Used by SetAxisOrientation() to invert the axes
 510
 511     // what is a mm on a screen you don't know the size of?
 512     double       m_mm_to_pix_x,
 513                  m_mm_to_pix_y;
 514
 515     // bounding and clipping boxes
 516     wxCoord m_minX, m_minY, m_maxX, m_maxY;
 517     wxCoord m_clipX1, m_clipY1, m_clipX2, m_clipY2;
 518
 519     int m_logicalFunction;
 520     int m_backgroundMode;
 521     int m_mappingMode;
 522
 523     wxPen             m_pen;
 524     wxBrush           m_brush;
 525     wxBrush           m_backgroundBrush;
 526     wxColour          m_textForegroundColour;
 527     wxColour          m_textBackgroundColour;
 528     wxFont            m_font;
 529
 530 #if wxUSE_PALETTE
 531     wxPalette         m_palette;
 532     bool              m_hasCustomPalette;
 533 #endif // wxUSE_PALETTE
 534
 535 private:
 536     DECLARE_ABSTRACT_CLASS(wxDCImpl)
 537 };
 538
 539
 540 class WXDLLIMPEXP_CORE wxDC: public wxObject
 541 {
 542 public:
 543     wxDC()   { m_pimpl = NULL; }
 544     ~wxDC()  { if (m_pimpl) delete m_pimpl; }
 545
 546     wxDCImpl *GetImpl()
 547         { return m_pimpl; }
 548     const wxDCImpl *GetImpl() const
 549         { return m_pimpl; }
 550
 551     wxWindow *GetWindow()
 552         { return m_pimpl->GetWindow(); }
 553
 554     bool IsOk() const
 555         { return m_pimpl && m_pimpl->IsOk(); }
 556
 557     // query capabilities
 558
 559     bool CanDrawBitmap() const
 560         { return m_pimpl->CanDrawBitmap(); }
 561     bool CanGetTextExtent() const
 562         { return m_pimpl->CanGetTextExtent(); }
 563
 564     // query dimension, colour deps, resolution
 565
 566     void GetSize(int *width, int *height) const
 567         { m_pimpl->DoGetSize(width, height); }
 568
 569     wxSize GetSize() const
 570     {
 571         int w, h;
 572         m_pimpl->DoGetSize(&w, &h);
 573         return wxSize(w, h);
 574     }
 575
 576     void GetSizeMM(int* width, int* height) const
 577         { m_pimpl->DoGetSizeMM(width, height); }
 578     wxSize GetSizeMM() const
 579     {
 580         int w, h;
 581         m_pimpl->DoGetSizeMM(&w, &h);
 582         return wxSize(w, h);
 583     }
 584
 585     int GetDepth() const
 586         { return m_pimpl->GetDepth(); }
 587     wxSize GetPPI() const
 588         { return m_pimpl->GetPPI(); }
 589
 590     virtual int GetResolution()
 591         { return m_pimpl->GetResolution(); }
 592
 593     // Right-To-Left (RTL) modes
 594
 595     void SetLayoutDirection(wxLayoutDirection dir)
 596         { m_pimpl->SetLayoutDirection( dir ); }
 597     wxLayoutDirection GetLayoutDirection() const
 598         { return m_pimpl->GetLayoutDirection(); }
 599
 600     // page and document
 601
 602     bool StartDoc(const wxString& message)
 603         { return m_pimpl->StartDoc(message); }
 604     void EndDoc()
 605         { m_pimpl->EndDoc(); }
 606
 607     void StartPage()
 608         { m_pimpl->StartPage(); }
 609     void EndPage()
 610         { m_pimpl->EndPage(); }
 611
 612     // bounding box
 613
 614     void CalcBoundingBox(wxCoord x, wxCoord y)
 615         { m_pimpl->CalcBoundingBox(x,y); }
 616     void ResetBoundingBox()
 617         { m_pimpl->ResetBoundingBox(); }
 618
 619     wxCoord MinX() const
 620         { return m_pimpl->MinX(); }
 621     wxCoord MaxX() const
 622         { return m_pimpl->MaxX(); }
 623     wxCoord MinY() const
 624         { return m_pimpl->MinY(); }
 625     wxCoord MaxY() const
 626         { return m_pimpl->MaxY(); }
 627
 628     // setters and getters
 629
 630     void SetFont(const wxFont& font)
 631         { m_pimpl->SetFont( font ); }
 632     const wxFont&   GetFont() const
 633         { return m_pimpl->GetFont(); }
 634
 635     void SetPen(const wxPen& pen)
 636         { m_pimpl->SetPen( pen ); }
 637     const wxPen&    GetPen() const
 638         { return m_pimpl->GetPen(); }
 639
 640     void SetBrush(const wxBrush& brush)
 641         { m_pimpl->SetBrush( brush ); }
 642     const wxBrush&  GetBrush() const
 643         { return m_pimpl->GetBrush(); }
 644
 645     void SetBackground(const wxBrush& brush)
 646         { m_pimpl->SetBackground( brush ); }
 647     const wxBrush&  GetBackground() const
 648         { return m_pimpl->GetBackground(); }
 649
 650     void SetBackgroundMode(int mode)
 651         { m_pimpl->SetBackgroundMode( mode ); }
 652     int GetBackgroundMode() const
 653         { return m_pimpl->GetBackgroundMode(); }
 654
 655     void SetTextForeground(const wxColour& colour)
 656         { m_pimpl->SetTextForeground(colour); }
 657     const wxColour& GetTextForeground() const
 658         { return m_pimpl->GetTextForeground(); }
 659
 660     void SetTextBackground(const wxColour& colour)
 661         { m_pimpl->SetTextBackground(colour); }
 662     const wxColour& GetTextBackground() const
 663         { return m_pimpl->GetTextBackground(); }
 664
 665 #if wxUSE_PALETTE
 666     void SetPalette(const wxPalette& palette)
 667         { m_pimpl->SetPalette(palette); }
 668 #endif // wxUSE_PALETTE
 669
 670     // logical functions
 671
 672     void SetLogicalFunction(int function)
 673         { m_pimpl->SetLogicalFunction(function); }
 674     int GetLogicalFunction() const
 675         { return m_pimpl->GetLogicalFunction(); }
 676
 677     // text measurement
 678
 679     wxCoord GetCharHeight() const
 680         { return m_pimpl->GetCharHeight(); }
 681     wxCoord GetCharWidth() const
 682         { return m_pimpl->GetCharWidth(); }
 683
 684     void GetTextExtent(const wxString& string,
 685                        wxCoord *x, wxCoord *y,
 686                        wxCoord *descent = NULL,
 687                        wxCoord *externalLeading = NULL,
 688                        const wxFont *theFont = NULL) const
 689         { m_pimpl->DoGetTextExtent(string, x, y, descent, externalLeading, theFont); }
 690
 691     wxSize GetTextExtent(const wxString& string) const
 692     {
 693         wxCoord w, h;
 694         m_pimpl->DoGetTextExtent(string, &w, &h);
 695         return wxSize(w, h);
 696     }
 697
 698     void GetMultiLineTextExtent(const wxString& string,
 699                                         wxCoord *width,
 700                                         wxCoord *height,
 701                                         wxCoord *heightLine = NULL,
 702                                         const wxFont *font = NULL) const
 703         { m_pimpl->GetMultiLineTextExtent( string, width, height, heightLine, font ); }
 704
 705     wxSize GetMultiLineTextExtent(const wxString& string) const
 706     {
 707         wxCoord w, h;
 708         m_pimpl->GetMultiLineTextExtent(string, &w, &h);
 709         return wxSize(w, h);
 710     }
 711
 712     bool GetPartialTextExtents(const wxString& text, wxArrayInt& widths) const
 713         { return m_pimpl->DoGetPartialTextExtents(text, widths); }
 714
 715     // clearing
 716
 717     void Clear()
 718         { m_pimpl->Clear(); }
 719
 720     // clipping
 721
 722     void SetClippingRegion(wxCoord x, wxCoord y, wxCoord width, wxCoord height)
 723         { m_pimpl->DoSetClippingRegion(x, y, width, height); }
 724     void SetClippingRegion(const wxPoint& pt, const wxSize& sz)
 725         { m_pimpl->DoSetClippingRegion(pt.x, pt.y, sz.x, sz.y); }
 726     void SetClippingRegion(const wxRect& rect)
 727         { m_pimpl->DoSetClippingRegion(rect.x, rect.y, rect.width, rect.height); }
 728     void SetClippingRegion(const wxRegion& region)
 729         { m_pimpl->DoSetClippingRegionAsRegion(region); }
 730
 731     void DestroyClippingRegion()
 732         { m_pimpl->DestroyClippingRegion(); }
 733
 734     void GetClippingBox(wxCoord *x, wxCoord *y, wxCoord *w, wxCoord *h) const
 735         { m_pimpl->DoGetClippingBox(x, y, w, h); }
 736     void GetClippingBox(wxRect& rect) const
 737         { m_pimpl->DoGetClippingBox(&rect.x, &rect.y, &rect.width, &rect.height); }
 738
 739     // coordinates conversions and transforms
 740
 741     wxCoord DeviceToLogicalX(wxCoord x) const
 742         { return m_pimpl->DeviceToLogicalX(x); }
 743     wxCoord DeviceToLogicalY(wxCoord y) const
 744         { return m_pimpl->DeviceToLogicalY(y); }
 745     wxCoord DeviceToLogicalXRel(wxCoord x) const
 746         { return m_pimpl->DeviceToLogicalXRel(x); }
 747     wxCoord DeviceToLogicalYRel(wxCoord y) const
 748         { return m_pimpl->DeviceToLogicalYRel(y); }
 749     wxCoord LogicalToDeviceX(wxCoord x) const
 750         { return m_pimpl->LogicalToDeviceX(x); }
 751     wxCoord LogicalToDeviceY(wxCoord y) const
 752         { return m_pimpl->LogicalToDeviceY(y); }
 753     wxCoord LogicalToDeviceXRel(wxCoord x) const
 754         { return m_pimpl->LogicalToDeviceXRel(x); }
 755     wxCoord LogicalToDeviceYRel(wxCoord y) const
 756         { return m_pimpl->LogicalToDeviceYRel(y); }
 757
 758     void SetMapMode(int mode)
 759         { m_pimpl->SetMapMode(mode); }
 760     int GetMapMode() const
 761         { return m_pimpl->GetMapMode(); }
 762
 763     void SetUserScale(double x, double y)
 764         { m_pimpl->SetUserScale(x,y); }
 765     void GetUserScale(double *x, double *y) const
 766         { m_pimpl->GetUserScale( x, y ); }
 767
 768     void SetLogicalScale(double x, double y)
 769         { m_pimpl->SetLogicalScale( x, y ); }
 770     void GetLogicalScale(double *x, double *y)
 771         { m_pimpl->GetLogicalScale( x, y ); }
 772
 773     void SetLogicalOrigin(wxCoord x, wxCoord y)
 774         { m_pimpl->SetLogicalOrigin(x,y); }
 775     void GetLogicalOrigin(wxCoord *x, wxCoord *y) const
 776         { m_pimpl->DoGetLogicalOrigin(x, y); }
 777     wxPoint GetLogicalOrigin() const
 778         { wxCoord x, y; m_pimpl->DoGetLogicalOrigin(&x, &y); return wxPoint(x, y); }
 779
 780     void SetDeviceOrigin(wxCoord x, wxCoord y)
 781         { m_pimpl->SetDeviceOrigin( x, y); }
 782     void GetDeviceOrigin(wxCoord *x, wxCoord *y) const
 783         { m_pimpl->DoGetDeviceOrigin(x, y); }
 784     wxPoint GetDeviceOrigin() const
 785         { wxCoord x, y; m_pimpl->DoGetDeviceOrigin(&x, &y); return wxPoint(x, y); }
 786
 787     void SetAxisOrientation(bool xLeftRight, bool yBottomUp)
 788         { m_pimpl->SetAxisOrientation(xLeftRight, yBottomUp); }
 789
 790     // mostly internal
 791     void SetDeviceLocalOrigin( wxCoord x, wxCoord y )
 792         { m_pimpl->SetDeviceLocalOrigin( x, y ); }
 793
 794
 795     // draw generic object
 796
 797     void DrawObject(wxDrawObject* drawobject)
 798     {
 799         drawobject->Draw(*this);
 800         CalcBoundingBox(drawobject->MinX(),drawobject->MinY());
 801         CalcBoundingBox(drawobject->MaxX(),drawobject->MaxY());
 802     }
 803
 804     // -----------------------------------------------
 805     // the actual drawing API
 806
 807     bool FloodFill(wxCoord x, wxCoord y, const wxColour& col,
 808                    int style = wxFLOOD_SURFACE)
 809         { return m_pimpl->DoFloodFill(x, y, col, style); }
 810     bool FloodFill(const wxPoint& pt, const wxColour& col,
 811                    int style = wxFLOOD_SURFACE)
 812         { return m_pimpl->DoFloodFill(pt.x, pt.y, col, style); }
 813
 814     // fill the area specified by rect with a radial gradient, starting from
 815     // initialColour in the centre of the cercle and fading to destColour.
 816     void GradientFillConcentric(const wxRect& rect,
 817                                 const wxColour& initialColour,
 818                                 const wxColour& destColour)
 819         { m_pimpl->DoGradientFillConcentric( rect, initialColour, destColour,
 820                                              wxPoint(rect.GetWidth() / 2,
 821                                                      rect.GetHeight() / 2)); }
 822
 823     void GradientFillConcentric(const wxRect& rect,
 824                                 const wxColour& initialColour,
 825                                 const wxColour& destColour,
 826                                 const wxPoint& circleCenter)
 827         { m_pimpl->DoGradientFillConcentric(rect, initialColour, destColour, circleCenter); }
 828
 829     // fill the area specified by rect with a linear gradient
 830     void GradientFillLinear(const wxRect& rect,
 831                             const wxColour& initialColour,
 832                             const wxColour& destColour,
 833                             wxDirection nDirection = wxEAST)
 834         { m_pimpl->DoGradientFillLinear(rect, initialColour, destColour, nDirection); }
 835
 836     bool GetPixel(wxCoord x, wxCoord y, wxColour *col) const
 837         { return m_pimpl->DoGetPixel(x, y, col); }
 838     bool GetPixel(const wxPoint& pt, wxColour *col) const
 839         { return m_pimpl->DoGetPixel(pt.x, pt.y, col); }
 840
 841     void DrawLine(wxCoord x1, wxCoord y1, wxCoord x2, wxCoord y2)
 842         { m_pimpl->DoDrawLine(x1, y1, x2, y2); }
 843     void DrawLine(const wxPoint& pt1, const wxPoint& pt2)
 844         { m_pimpl->DoDrawLine(pt1.x, pt1.y, pt2.x, pt2.y); }
 845
 846     void CrossHair(wxCoord x, wxCoord y)
 847         { m_pimpl->DoCrossHair(x, y); }
 848     void CrossHair(const wxPoint& pt)
 849         { m_pimpl->DoCrossHair(pt.x, pt.y); }
 850
 851     void DrawArc(wxCoord x1, wxCoord y1, wxCoord x2, wxCoord y2,
 852                  wxCoord xc, wxCoord yc)
 853         { m_pimpl->DoDrawArc(x1, y1, x2, y2, xc, yc); }
 854     void DrawArc(const wxPoint& pt1, const wxPoint& pt2, const wxPoint& centre)
 855         { m_pimpl->DoDrawArc(pt1.x, pt1.y, pt2.x, pt2.y, centre.x, centre.y); }
 856
 857     void DrawCheckMark(wxCoord x, wxCoord y,
 858                        wxCoord width, wxCoord height)
 859         { m_pimpl->DoDrawCheckMark(x, y, width, height); }
 860     void DrawCheckMark(const wxRect& rect)
 861         { m_pimpl->DoDrawCheckMark(rect.x, rect.y, rect.width, rect.height); }
 862
 863     void DrawEllipticArc(wxCoord x, wxCoord y, wxCoord w, wxCoord h,
 864                          double sa, double ea)
 865         { m_pimpl->DoDrawEllipticArc(x, y, w, h, sa, ea); }
 866     void DrawEllipticArc(const wxPoint& pt, const wxSize& sz,
 867                          double sa, double ea)
 868         { m_pimpl->DoDrawEllipticArc(pt.x, pt.y, sz.x, sz.y, sa, ea); }
 869
 870     void DrawPoint(wxCoord x, wxCoord y)
 871         { m_pimpl->DoDrawPoint(x, y); }
 872     void DrawPoint(const wxPoint& pt)
 873         { m_pimpl->DoDrawPoint(pt.x, pt.y); }
 874
 875     void DrawLines(int n, wxPoint points[],
 876                    wxCoord xoffset = 0, wxCoord yoffset = 0)
 877         { m_pimpl->DoDrawLines(n, points, xoffset, yoffset); }
 878     void DrawLines(const wxPointList *list,
 879                    wxCoord xoffset = 0, wxCoord yoffset = 0)
 880         { m_pimpl->DrawLines( list, xoffset, yoffset ); }
 881 #if WXWIN_COMPATIBILITY_2_8
 882     wxDEPRECATED( void DrawLines(const wxList *list,
 883                                  wxCoord xoffset = 0, wxCoord yoffset = 0) );
 884 #endif  // WXWIN_COMPATIBILITY_2_8
 885
 886     void DrawPolygon(int n, wxPoint points[],
 887                      wxCoord xoffset = 0, wxCoord yoffset = 0,
 888                      int fillStyle = wxODDEVEN_RULE)
 889         { m_pimpl->DoDrawPolygon(n, points, xoffset, yoffset, fillStyle); }
 890     void DrawPolygon(const wxPointList *list,
 891                      wxCoord xoffset = 0, wxCoord yoffset = 0,
 892                      int fillStyle = wxODDEVEN_RULE)
 893         { m_pimpl->DrawPolygon( list, xoffset, yoffset, fillStyle ); }
 894     void DrawPolyPolygon(int n, int count[], wxPoint points[],
 895                          wxCoord xoffset = 0, wxCoord yoffset = 0,
 896                          int fillStyle = wxODDEVEN_RULE)
 897         { m_pimpl->DoDrawPolyPolygon(n, count, points, xoffset, yoffset, fillStyle); }
 898 #if WXWIN_COMPATIBILITY_2_8
 899     wxDEPRECATED( void DrawPolygon(const wxList *list,
 900                      wxCoord xoffset = 0, wxCoord yoffset = 0,
 901                      int fillStyle = wxODDEVEN_RULE) );
 902 #endif  // WXWIN_COMPATIBILITY_2_8
 903
 904     void DrawRectangle(wxCoord x, wxCoord y, wxCoord width, wxCoord height)
 905         { m_pimpl->DoDrawRectangle(x, y, width, height); }
 906     void DrawRectangle(const wxPoint& pt, const wxSize& sz)
 907         { m_pimpl->DoDrawRectangle(pt.x, pt.y, sz.x, sz.y); }
 908     void DrawRectangle(const wxRect& rect)
 909         { m_pimpl->DoDrawRectangle(rect.x, rect.y, rect.width, rect.height); }
 910
 911     void DrawRoundedRectangle(wxCoord x, wxCoord y, wxCoord width, wxCoord height,
 912                               double radius)
 913         { m_pimpl->DoDrawRoundedRectangle(x, y, width, height, radius); }
 914     void DrawRoundedRectangle(const wxPoint& pt, const wxSize& sz,
 915                              double radius)
 916         { m_pimpl->DoDrawRoundedRectangle(pt.x, pt.y, sz.x, sz.y, radius); }
 917     void DrawRoundedRectangle(const wxRect& r, double radius)
 918         { m_pimpl->DoDrawRoundedRectangle(r.x, r.y, r.width, r.height, radius); }
 919
 920     void DrawCircle(wxCoord x, wxCoord y, wxCoord radius)
 921         { m_pimpl->DoDrawEllipse(x - radius, y - radius, 2*radius, 2*radius); }
 922     void DrawCircle(const wxPoint& pt, wxCoord radius)
 923         { m_pimpl->DoDrawEllipse(pt.x - radius, pt.y - radius, 2*radius, 2*radius); }
 924
 925     void DrawEllipse(wxCoord x, wxCoord y, wxCoord width, wxCoord height)
 926         { m_pimpl->DoDrawEllipse(x, y, width, height); }
 927     void DrawEllipse(const wxPoint& pt, const wxSize& sz)
 928         { m_pimpl->DoDrawEllipse(pt.x, pt.y, sz.x, sz.y); }
 929     void DrawEllipse(const wxRect& rect)
 930         { m_pimpl->DoDrawEllipse(rect.x, rect.y, rect.width, rect.height); }
 931
 932     void DrawIcon(const wxIcon& icon, wxCoord x, wxCoord y)
 933         { m_pimpl->DoDrawIcon(icon, x, y); }
 934     void DrawIcon(const wxIcon& icon, const wxPoint& pt)
 935         { m_pimpl->DoDrawIcon(icon, pt.x, pt.y); }
 936
 937     void DrawBitmap(const wxBitmap &bmp, wxCoord x, wxCoord y,
 938                     bool useMask = false)
 939         { m_pimpl->DoDrawBitmap(bmp, x, y, useMask); }
 940     void DrawBitmap(const wxBitmap &bmp, const wxPoint& pt,
 941                     bool useMask = false)
 942         { m_pimpl->DoDrawBitmap(bmp, pt.x, pt.y, useMask); }
 943
 944     void DrawText(const wxString& text, wxCoord x, wxCoord y)
 945         { m_pimpl->DoDrawText(text, x, y); }
 946     void DrawText(const wxString& text, const wxPoint& pt)
 947         { m_pimpl->DoDrawText(text, pt.x, pt.y); }
 948
 949     void DrawRotatedText(const wxString& text, wxCoord x, wxCoord y, double angle)
 950         { m_pimpl->DoDrawRotatedText(text, x, y, angle); }
 951     void DrawRotatedText(const wxString& text, const wxPoint& pt, double angle)
 952         { m_pimpl->DoDrawRotatedText(text, pt.x, pt.y, angle); }
 953
 954     // this version puts both optional bitmap and the text into the given
 955     // rectangle and aligns is as specified by alignment parameter; it also
 956     // will emphasize the character with the given index if it is != -1 and
 957     // return the bounding rectangle if required
 958     void DrawLabel(const wxString& text,
 959                            const wxBitmap& image,
 960                            const wxRect& rect,
 961                            int alignment = wxALIGN_LEFT | wxALIGN_TOP,
 962                            int indexAccel = -1,
 963                            wxRect *rectBounding = NULL);
 964
 965     void DrawLabel(const wxString& text, const wxRect& rect,
 966                    int alignment = wxALIGN_LEFT | wxALIGN_TOP,
 967                    int indexAccel = -1)
 968         { DrawLabel(text, wxNullBitmap, rect, alignment, indexAccel); }
 969
 970     bool Blit(wxCoord xdest, wxCoord ydest, wxCoord width, wxCoord height,
 971               wxDC *source, wxCoord xsrc, wxCoord ysrc,
 972               int rop = wxCOPY, bool useMask = false, wxCoord xsrcMask = wxDefaultCoord, wxCoord ysrcMask = wxDefaultCoord)
 973     {
 974         return m_pimpl->DoBlit(xdest, ydest, width, height,
 975                       source, xsrc, ysrc, rop, useMask, xsrcMask, ysrcMask);
 976     }
 977     bool Blit(const wxPoint& destPt, const wxSize& sz,
 978               wxDC *source, const wxPoint& srcPt,
 979               int rop = wxCOPY, bool useMask = false, const wxPoint& srcPtMask = wxDefaultPosition)
 980     {
 981         return m_pimpl->DoBlit(destPt.x, destPt.y, sz.x, sz.y,
 982                       source, srcPt.x, srcPt.y, rop, useMask, srcPtMask.x, srcPtMask.y);
 983     }
 984
 985     bool StretchBlit(wxCoord dstX, wxCoord dstY,
 986                      wxCoord dstWidth, wxCoord dstHeight,
 987                      wxDC *source,
 988                      wxCoord srcX, wxCoord srcY,
 989                      wxCoord srcWidth, wxCoord srcHeight,
 990                      int rop = wxCOPY, bool useMask = false,
 991                      wxCoord srcMaskX = wxDefaultCoord, wxCoord srcMaskY = wxDefaultCoord)
 992     {
 993         return m_pimpl->DoStretchBlit(dstX, dstY, dstWidth, dstHeight,
 994                       source, srcX, srcY, srcWidth, srcHeight, rop, useMask, srcMaskX, srcMaskY);
 995     }
 996     bool StretchBlit(const wxPoint& dstPt, const wxSize& dstSize,
 997                      wxDC *source, const wxPoint& srcPt, const wxSize& srcSize,
 998                      int rop = wxCOPY, bool useMask = false, const wxPoint& srcMaskPt = wxDefaultPosition)
 999     {
1000         return m_pimpl->DoStretchBlit(dstPt.x, dstPt.y, dstSize.x, dstSize.y,
1001                       source, srcPt.x, srcPt.y, srcSize.x, srcSize.y, rop, useMask, srcMaskPt.x, srcMaskPt.y);
1002     }
1003
1004     wxBitmap GetAsBitmap(const wxRect *subrect = (const wxRect *) NULL) const
1005     {
1006         return m_pimpl->DoGetAsBitmap(subrect);
1007     }
1008
1009 #if wxUSE_SPLINES
1010     void DrawSpline(wxCoord x1, wxCoord y1,
1011                     wxCoord x2, wxCoord y2,
1012                     wxCoord x3, wxCoord y3)
1013         { m_pimpl->DoDrawSpline(x1,y1,x2,y2,x3,y3); }
1014     void DrawSpline(int n, wxPoint points[])
1015         { m_pimpl->DoDrawSpline(n,points); }
1016     void DrawSpline(const wxPointList *points)
1017         { m_pimpl->DoDrawSpline(points); }
1018 #endif // wxUSE_SPLINES
1019
1020
1021 #if WXWIN_COMPATIBILITY_2_8
1022     // for compatibility with the old code when wxCoord was long everywhere
1023     wxDEPRECATED( void GetTextExtent(const wxString& string,
1024                        long *x, long *y,
1025                        long *descent = NULL,
1026                        long *externalLeading = NULL,
1027                        const wxFont *theFont = NULL) const );
1028     wxDEPRECATED( void GetLogicalOrigin(long *x, long *y) const );
1029     wxDEPRECATED( void GetDeviceOrigin(long *x, long *y) const );
1030     wxDEPRECATED( void GetClippingBox(long *x, long *y, long *w, long *h) const );
1031 #endif  // WXWIN_COMPATIBILITY_2_8
1032
1033
1034 protected:
1035     wxDCImpl    *m_pimpl;
1036
1037 private:
1038     DECLARE_ABSTRACT_CLASS(wxDC)
1039 };
1040
1041 // ----------------------------------------------------------------------------
1042 // helper class: you can use it to temporarily change the DC text colour and
1043 // restore it automatically when the object goes out of scope
1044 // ----------------------------------------------------------------------------
1045
1046 class WXDLLEXPORT wxDCTextColourChanger
1047 {
1048 public:
1049     wxDCTextColourChanger(wxDC& dc) : m_dc(dc), m_colFgOld() { }
1050
1051     wxDCTextColourChanger(wxDC& dc, const wxColour& col) : m_dc(dc)
1052     {
1053         Set(col);
1054     }
1055
1056     ~wxDCTextColourChanger()
1057     {
1058         if ( m_colFgOld.Ok() )
1059             m_dc.SetTextForeground(m_colFgOld);
1060     }
1061
1062     void Set(const wxColour& col)
1063     {
1064         if ( !m_colFgOld.Ok() )
1065             m_colFgOld = m_dc.GetTextForeground();
1066         m_dc.SetTextForeground(col);
1067     }
1068
1069 private:
1070     wxDC& m_dc;
1071
1072     wxColour m_colFgOld;
1073
1074     DECLARE_NO_COPY_CLASS(wxDCTextColourChanger)
1075 };
1076
1077 // ----------------------------------------------------------------------------
1078 // helper class: you can use it to temporarily change the DC pen and
1079 // restore it automatically when the object goes out of scope
1080 // ----------------------------------------------------------------------------
1081
1082 class WXDLLEXPORT wxDCPenChanger
1083 {
1084 public:
1085     wxDCPenChanger(wxDC& dc, const wxPen& pen) : m_dc(dc), m_penOld(dc.GetPen())
1086     {
1087         m_dc.SetPen(pen);
1088     }
1089
1090     ~wxDCPenChanger()
1091     {
1092         if ( m_penOld.Ok() )
1093             m_dc.SetPen(m_penOld);
1094     }
1095
1096 private:
1097     wxDC& m_dc;
1098
1099     wxPen m_penOld;
1100
1101     DECLARE_NO_COPY_CLASS(wxDCPenChanger)
1102 };
1103
1104 // ----------------------------------------------------------------------------
1105 // helper class: you can use it to temporarily change the DC brush and
1106 // restore it automatically when the object goes out of scope
1107 // ----------------------------------------------------------------------------
1108
1109 class WXDLLEXPORT wxDCBrushChanger
1110 {
1111 public:
1112     wxDCBrushChanger(wxDC& dc, const wxBrush& brush) : m_dc(dc), m_brushOld(dc.GetBrush())
1113     {
1114         m_dc.SetBrush(brush);
1115     }
1116
1117     ~wxDCBrushChanger()
1118     {
1119         if ( m_brushOld.Ok() )
1120             m_dc.SetBrush(m_brushOld);
1121     }
1122
1123 private:
1124     wxDC& m_dc;
1125
1126     wxBrush m_brushOld;
1127
1128     DECLARE_NO_COPY_CLASS(wxDCBrushChanger)
1129 };
1130
1131 // ----------------------------------------------------------------------------
1132 // another small helper class: sets the clipping region in its ctor and
1133 // destroys it in the dtor
1134 // ----------------------------------------------------------------------------
1135
1136 class WXDLLEXPORT wxDCClipper
1137 {
1138 public:
1139     wxDCClipper(wxDC& dc, const wxRegion& r) : m_dc(dc)
1140         { dc.SetClippingRegion(r); }
1141     wxDCClipper(wxDC& dc, const wxRect& r) : m_dc(dc)
1142         { dc.SetClippingRegion(r.x, r.y, r.width, r.height); }
1143     wxDCClipper(wxDC& dc, wxCoord x, wxCoord y, wxCoord w, wxCoord h) : m_dc(dc)
1144         { dc.SetClippingRegion(x, y, w, h); }
1145
1146     ~wxDCClipper() { m_dc.DestroyClippingRegion(); }
1147
1148 private:
1149     wxDC& m_dc;
1150
1151     DECLARE_NO_COPY_CLASS(wxDCClipper)
1152 };
1153
1154 #endif // _WX_DC_H_BASE_