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