src/stubs/dcclient.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        dcclient.cpp
   3 // Purpose:     wxClientDC class
   4 // Author:      AUTHOR
   5 // Modified by:
   6 // Created:     01/02/97
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) AUTHOR
   9 // Licence:     wxWindows licence
  10 /////////////////////////////////////////////////////////////////////////////
  11
  12 #ifdef __GNUG__
  13 #pragma implementation "dcclient.h"
  14 #endif
  15
  16 #include "wx/dcclient.h"
  17 #include "wx/dcmemory.h"
  18 #include <math.h>
  19
  20 //-----------------------------------------------------------------------------
  21 // constants
  22 //-----------------------------------------------------------------------------
  23
  24 #define RAD2DEG 57.2957795131
  25
  26 //-----------------------------------------------------------------------------
  27 // wxPaintDC
  28 //-----------------------------------------------------------------------------
  29
  30 #if !USE_SHARED_LIBRARY
  31 IMPLEMENT_DYNAMIC_CLASS(wxWindowDC, wxDC)
  32 IMPLEMENT_DYNAMIC_CLASS(wxClientDC, wxWindowDC)
  33 IMPLEMENT_DYNAMIC_CLASS(wxPaintDC, wxWindowDC)
  34 #endif
  35
  36 /*
  37  * wxWindowDC
  38  */
  39
  40 wxWindowDC::wxWindowDC(void)
  41 {
  42 };
  43
  44 wxWindowDC::wxWindowDC( wxWindow *window )
  45 {
  46 };
  47
  48 wxWindowDC::~wxWindowDC(void)
  49 {
  50 };
  51
  52 void wxWindowDC::FloodFill( long WXUNUSED(x1), long WXUNUSED(y1),
  53   wxColour* WXUNUSED(col), int WXUNUSED(style) )
  54 {
  55 };
  56
  57 bool wxWindowDC::GetPixel( long WXUNUSED(x1), long WXUNUSED(y1), wxColour *WXUNUSED(col) ) const
  58 {
  59   return FALSE;
  60 };
  61
  62 void wxWindowDC::DrawLine( long x1, long y1, long x2, long y2 )
  63 {
  64   if (!Ok()) return;
  65
  66 };
  67
  68 void wxWindowDC::CrossHair( long x, long y )
  69 {
  70   if (!Ok()) return;
  71
  72 };
  73
  74 void wxWindowDC::DrawArc( long x1, long y1, long x2, long y2, long xc, long yc )
  75 {
  76   if (!Ok()) return;
  77
  78   long xx1 = XLOG2DEV(x1);
  79   long yy1 = YLOG2DEV(y1);
  80   long xx2 = XLOG2DEV(x2);
  81   long yy2 = YLOG2DEV(y2);
  82   long xxc = XLOG2DEV((long)xc);
  83   long yyc = YLOG2DEV((long)yc);
  84   double dx = xx1 - xxc;
  85   double dy = yy1 - yyc;
  86   double radius = sqrt(dx*dx+dy*dy);
  87   long   r      = (long)radius;
  88   double radius1, radius2;
  89
  90   if (xx1 == xx2 && yy1 == yy2)
  91   {
  92     radius1 = 0.0;
  93     radius2 = 360.0;
  94   }
  95   else
  96   if (radius == 0.0)
  97   {
  98     radius1 = radius2 = 0.0;
  99   }
 100   else
 101   {
 102     radius1 = (xx1 - xxc == 0) ?
 103             (yy1 - yyc < 0) ? 90.0 : -90.0 :
 104             -atan2(double(yy1-yyc), double(xx1-xxc)) * RAD2DEG;
 105     radius2 = (xx2 - xxc == 0) ?
 106             (yy2 - yyc < 0) ? 90.0 : -90.0 :
 107             -atan2(double(yy2-yyc), double(xx2-xxc)) * RAD2DEG;
 108   };
 109   long alpha1 = long(radius1 * 64.0);
 110   long alpha2 = long((radius2 - radius1) * 64.0);
 111   while (alpha2 <= 0) alpha2 += 360*64;
 112   while (alpha1 > 360*64) alpha1 -= 360*64;
 113
 114   if (m_brush.GetStyle() != wxTRANSPARENT) {};
 115
 116   if (m_pen.GetStyle() != wxTRANSPARENT) {};
 117
 118 };
 119
 120 void wxWindowDC::DrawEllipticArc( long x, long y, long width, long height, double sa, double ea )
 121 {
 122   if (!Ok()) return;
 123
 124   long xx = XLOG2DEV(x);
 125   long yy = YLOG2DEV(y);
 126   long ww = m_signX * XLOG2DEVREL(width);
 127   long hh = m_signY * YLOG2DEVREL(height);
 128
 129   // CMB: handle -ve width and/or height
 130   if (ww < 0) { ww = -ww; xx = xx - ww; }
 131   if (hh < 0) { hh = -hh; yy = yy - hh; }
 132
 133   long start = long(sa * 64.0);
 134   long end = long(ea * 64.0);
 135   if (m_brush.GetStyle() != wxTRANSPARENT) {};
 136
 137   if (m_pen.GetStyle() != wxTRANSPARENT) {};
 138 };
 139
 140 void wxWindowDC::DrawPoint( long x, long y )
 141 {
 142   if (!Ok()) return;
 143
 144   if (m_pen.GetStyle() != wxTRANSPARENT) {};
 145 };
 146
 147 void wxWindowDC::DrawLines( int n, wxPoint points[], long xoffset, long yoffset )
 148 {
 149   if (!Ok()) return;
 150
 151   if (m_pen.GetStyle() == wxTRANSPARENT) return;
 152
 153   for (int i = 0; i < n-1; i++)
 154   {
 155     long x1 = XLOG2DEV(points[i].x + xoffset);
 156     long x2 = XLOG2DEV(points[i+1].x + xoffset);
 157     long y1 = YLOG2DEV(points[i].y + yoffset);     // oh, what a waste
 158     long y2 = YLOG2DEV(points[i+1].y + yoffset);
 159   };
 160 };
 161
 162 void wxWindowDC::DrawLines( wxList *points, long xoffset, long yoffset )
 163 {
 164   if (!Ok()) return;
 165
 166   if (m_pen.GetStyle() == wxTRANSPARENT) return;
 167
 168   wxNode *node = points->First();
 169   while (node->Next())
 170   {
 171     wxPoint *point = (wxPoint*)node->Data();
 172     wxPoint *npoint = (wxPoint*)node->Next()->Data();
 173     long x1 = XLOG2DEV(point->x + xoffset);
 174     long x2 = XLOG2DEV(npoint->x + xoffset);
 175     long y1 = YLOG2DEV(point->y + yoffset);    // and again...
 176     long y2 = YLOG2DEV(npoint->y + yoffset);
 177     node = node->Next();
 178   };
 179 };
 180
 181 void wxWindowDC::DrawPolygon( int WXUNUSED(n), wxPoint WXUNUSED(points)[],
 182   long WXUNUSED(xoffset), long WXUNUSED(yoffset), int WXUNUSED(fillStyle) )
 183 {
 184   if (!Ok()) return;
 185 };
 186
 187 void wxWindowDC::DrawPolygon( wxList *WXUNUSED(lines), long WXUNUSED(xoffset),
 188                              long WXUNUSED(yoffset), int WXUNUSED(fillStyle) )
 189 {
 190   if (!Ok()) return;
 191 };
 192
 193 void wxWindowDC::DrawRectangle( long x, long y, long width, long height )
 194 {
 195   if (!Ok()) return;
 196
 197   long xx = XLOG2DEV(x);
 198   long yy = YLOG2DEV(y);
 199   long ww = m_signX * XLOG2DEVREL(width);
 200   long hh = m_signY * YLOG2DEVREL(height);
 201
 202   // CMB: draw nothing if transformed w or h is 0
 203   if (ww == 0 || hh == 0) return;
 204
 205   // CMB: handle -ve width and/or height
 206   if (ww < 0) { ww = -ww; xx = xx - ww; }
 207   if (hh < 0) { hh = -hh; yy = yy - hh; }
 208
 209   if (m_brush.GetStyle() != wxTRANSPARENT) {};
 210
 211   if (m_pen.GetStyle() != wxTRANSPARENT) {};
 212 };
 213
 214 void wxWindowDC::DrawRoundedRectangle( long x, long y, long width, long height, double radius )
 215 {
 216   if (!Ok()) return;
 217
 218   if (radius < 0.0) radius = - radius * ((width < height) ? width : height);
 219
 220   long xx = XLOG2DEV(x);
 221   long yy = YLOG2DEV(y);
 222   long ww = m_signX * XLOG2DEVREL(width);
 223   long hh = m_signY * YLOG2DEVREL(height);
 224   long rr = XLOG2DEVREL((long)radius);
 225
 226   // CMB: handle -ve width and/or height
 227   if (ww < 0) { ww = -ww; xx = xx - ww; }
 228   if (hh < 0) { hh = -hh; yy = yy - hh; }
 229
 230   // CMB: if radius is zero use DrawRectangle() instead to avoid
 231   // X drawing errors with small radii
 232   if (rr == 0)
 233   {
 234     DrawRectangle( x, y, width, height );
 235     return;
 236   }
 237
 238   // CMB: draw nothing if transformed w or h is 0
 239   if (ww == 0 || hh == 0) return;
 240
 241   // CMB: adjust size if outline is drawn otherwise the result is
 242   // 1 pixel too wide and high
 243   if (m_pen.GetStyle() != wxTRANSPARENT)
 244   {
 245     ww--;
 246     hh--;
 247   }
 248
 249   // CMB: ensure dd is not larger than rectangle otherwise we
 250   // get an hour glass shape
 251   long dd = 2 * rr;
 252   if (dd > ww) dd = ww;
 253   if (dd > hh) dd = hh;
 254   rr = dd / 2;
 255
 256   if (m_brush.GetStyle() != wxTRANSPARENT)
 257   {
 258   };
 259
 260   if (m_pen.GetStyle() != wxTRANSPARENT)
 261   {
 262   };
 263 };
 264
 265 void wxWindowDC::DrawEllipse( long x, long y, long width, long height )
 266 {
 267   if (!Ok()) return;
 268
 269   long xx = XLOG2DEV(x);
 270   long yy = YLOG2DEV(y);
 271   long ww = m_signX * XLOG2DEVREL(width);
 272   long hh = m_signY * YLOG2DEVREL(height);
 273
 274   // CMB: handle -ve width and/or height
 275   if (ww < 0) { ww = -ww; xx = xx - ww; }
 276   if (hh < 0) { hh = -hh; yy = yy - hh; }
 277
 278   if (m_brush.GetStyle() != wxTRANSPARENT) {};
 279
 280   if (m_pen.GetStyle() != wxTRANSPARENT) {};
 281 };
 282
 283 bool wxWindowDC::CanDrawBitmap(void) const
 284 {
 285   return TRUE;
 286 };
 287
 288 void wxWindowDC::DrawIcon( const wxIcon &icon, long x, long y, bool useMask )
 289 {
 290   if (!Ok()) return;
 291
 292   if (!icon.Ok()) return;
 293
 294   int xx = XLOG2DEV(x);
 295   int yy = YLOG2DEV(y);
 296
 297 };
 298
 299 bool wxWindowDC::Blit( long xdest, long ydest, long width, long height,
 300        wxDC *source, long xsrc, long ysrc, int WXUNUSED(logical_func), bool WXUNUSED(useMask) )
 301 {
 302   if (!Ok()) return FALSE;
 303
 304   // CMB 20/5/98: add blitting of bitmaps
 305   if (source->IsKindOf(CLASSINFO(wxMemoryDC)))
 306   {
 307     wxMemoryDC* srcDC = (wxMemoryDC*)source;
 308     /*
 309      GdkBitmap* bmap = srcDC->m_selected.GetBitmap();
 310     if (bmap)
 311     {
 312       gdk_draw_bitmap (
 313           m_window,
 314           m_textGC,
 315           bmap,
 316           source->DeviceToLogicalX(xsrc), source->DeviceToLogicalY(ysrc),
 317           XLOG2DEV(xdest), YLOG2DEV(ydest),
 318           source->DeviceToLogicalXRel(width), source->DeviceToLogicalYRel(height)
 319           );
 320       return TRUE;
 321     }
 322     */
 323   }
 324
 325   return TRUE;
 326 };
 327
 328 void wxWindowDC::DrawText( const wxString &text, long x, long y, bool
 329 WXUNUSED(use16) )
 330 {
 331   if (!Ok()) return;
 332
 333 };
 334
 335
 336
 337 bool wxWindowDC::CanGetTextExtent(void) const
 338 {
 339   return TRUE;
 340 };
 341
 342 void wxWindowDC::GetTextExtent( const wxString &string, long *width, long *height,
 343                      long *WXUNUSED(descent), long *WXUNUSED(externalLeading),
 344                      wxFont *WXUNUSED(theFont), bool WXUNUSED(use16) )
 345 {
 346   if (!Ok()) return;
 347
 348 };
 349
 350 long wxWindowDC::GetCharWidth(void)
 351 {
 352   if (!Ok()) return 0;
 353   return 0;
 354 };
 355
 356 long wxWindowDC::GetCharHeight(void)
 357 {
 358   if (!Ok()) return 0;
 359   return 0;
 360 };
 361
 362 void wxWindowDC::Clear(void)
 363 {
 364   if (!Ok()) return;
 365
 366 };
 367
 368 void wxWindowDC::SetFont( const wxFont &font )
 369 {
 370   if (!Ok()) return;
 371
 372   m_font = font;
 373 };
 374
 375 void wxWindowDC::SetPen( const wxPen &pen )
 376 {
 377   if (!Ok()) return;
 378
 379   if (m_pen == pen) return;
 380
 381   m_pen = pen;
 382
 383   if (!m_pen.Ok()) return;
 384 };
 385
 386 void wxWindowDC::SetBrush( const wxBrush &brush )
 387 {
 388   if (!Ok()) return;
 389
 390   if (m_brush == brush) return;
 391
 392   m_brush = brush;
 393
 394   if (!m_brush.Ok()) return;
 395
 396 };
 397
 398 void wxWindowDC::SetBackground( const wxBrush &brush )
 399 {
 400   if (!Ok()) return;
 401
 402   if (m_backgroundBrush == brush) return;
 403
 404   m_backgroundBrush = brush;
 405
 406   if (!m_backgroundBrush.Ok()) return;
 407
 408 };
 409
 410 void wxWindowDC::SetLogicalFunction( int function )
 411 {
 412   if (m_logicalFunction == function) return;
 413 };
 414
 415 void wxWindowDC::SetTextForeground( const wxColour &col )
 416 {
 417   if (!Ok()) return;
 418
 419   if (m_textForegroundColour == col) return;
 420
 421   m_textForegroundColour = col;
 422   if (!m_textForegroundColour.Ok()) return;
 423 };
 424
 425 void wxWindowDC::SetTextBackground( const wxColour &col )
 426 {
 427   if (!Ok()) return;
 428
 429   if (m_textBackgroundColour == col) return;
 430
 431   m_textBackgroundColour = col;
 432   if (!m_textBackgroundColour.Ok()) return;
 433 };
 434
 435 void wxWindowDC::SetBackgroundMode( int mode )
 436 {
 437   m_backgroundMode = mode;
 438
 439   if (m_brush.GetStyle() != wxSOLID && m_brush.GetStyle() != wxTRANSPARENT)
 440   {
 441   }
 442 };
 443
 444 void wxWindowDC::SetPalette( const wxPalette& WXUNUSED(palette) )
 445 {
 446 };
 447
 448 void wxWindowDC::SetClippingRegion( long x, long y, long width, long height )
 449 {
 450   wxDC::SetClippingRegion( x, y, width, height );
 451
 452 };
 453
 454 void wxWindowDC::DestroyClippingRegion(void)
 455 {
 456   wxDC::DestroyClippingRegion();
 457
 458 };
 459
 460 // ----------------------------------- spline code ----------------------------------------
 461
 462 void wx_quadratic_spline(double a1, double b1, double a2, double b2,
 463                          double a3, double b3, double a4, double b4);
 464 void wx_clear_stack(void);
 465 int wx_spline_pop(double *x1, double *y1, double *x2, double *y2, double *x3,
 466         double *y3, double *x4, double *y4);
 467 void wx_spline_push(double x1, double y1, double x2, double y2, double x3, double y3,
 468           double x4, double y4);
 469 static bool wx_spline_add_point(double x, double y);
 470 static void wx_spline_draw_point_array(wxDC *dc);
 471
 472 wxList wx_spline_point_list;
 473
 474 #define         half(z1, z2)    ((z1+z2)/2.0)
 475 #define         THRESHOLD       5
 476
 477 /* iterative version */
 478
 479 void wx_quadratic_spline(double a1, double b1, double a2, double b2, double a3, double b3, double a4,
 480                  double b4)
 481 {
 482     register double  xmid, ymid;
 483     double           x1, y1, x2, y2, x3, y3, x4, y4;
 484
 485     wx_clear_stack();
 486     wx_spline_push(a1, b1, a2, b2, a3, b3, a4, b4);
 487
 488     while (wx_spline_pop(&x1, &y1, &x2, &y2, &x3, &y3, &x4, &y4)) {
 489         xmid = (double)half(x2, x3);
 490         ymid = (double)half(y2, y3);
 491         if (fabs(x1 - xmid) < THRESHOLD && fabs(y1 - ymid) < THRESHOLD &&
 492             fabs(xmid - x4) < THRESHOLD && fabs(ymid - y4) < THRESHOLD) {
 493             wx_spline_add_point( x1, y1 );
 494             wx_spline_add_point( xmid, ymid );
 495         } else {
 496             wx_spline_push(xmid, ymid, (double)half(xmid, x3), (double)half(ymid, y3),
 497                  (double)half(x3, x4), (double)half(y3, y4), x4, y4);
 498             wx_spline_push(x1, y1, (double)half(x1, x2), (double)half(y1, y2),
 499                  (double)half(x2, xmid), (double)half(y2, ymid), xmid, ymid);
 500         }
 501     }
 502 }
 503
 504 /* utilities used by spline drawing routines */
 505
 506 typedef struct wx_spline_stack_struct {
 507     double           x1, y1, x2, y2, x3, y3, x4, y4;
 508 } Stack;
 509
 510 #define         SPLINE_STACK_DEPTH             20
 511 static Stack    wx_spline_stack[SPLINE_STACK_DEPTH];
 512 static Stack   *wx_stack_top;
 513 static int      wx_stack_count;
 514
 515 void wx_clear_stack(void)
 516 {
 517     wx_stack_top = wx_spline_stack;
 518     wx_stack_count = 0;
 519 }
 520
 521 void wx_spline_push(double x1, double y1, double x2, double y2, double x3, double y3, double x4, double y4)
 522 {
 523     wx_stack_top->x1 = x1;
 524     wx_stack_top->y1 = y1;
 525     wx_stack_top->x2 = x2;
 526     wx_stack_top->y2 = y2;
 527     wx_stack_top->x3 = x3;
 528     wx_stack_top->y3 = y3;
 529     wx_stack_top->x4 = x4;
 530     wx_stack_top->y4 = y4;
 531     wx_stack_top++;
 532     wx_stack_count++;
 533 }
 534
 535 int wx_spline_pop(double *x1, double *y1, double *x2, double *y2,
 536                   double *x3, double *y3, double *x4, double *y4)
 537 {
 538     if (wx_stack_count == 0)
 539         return (0);
 540     wx_stack_top--;
 541     wx_stack_count--;
 542     *x1 = wx_stack_top->x1;
 543     *y1 = wx_stack_top->y1;
 544     *x2 = wx_stack_top->x2;
 545     *y2 = wx_stack_top->y2;
 546     *x3 = wx_stack_top->x3;
 547     *y3 = wx_stack_top->y3;
 548     *x4 = wx_stack_top->x4;
 549     *y4 = wx_stack_top->y4;
 550     return (1);
 551 }
 552
 553 static bool wx_spline_add_point(double x, double y)
 554 {
 555   wxPoint *point = new wxPoint ;
 556   point->x = (int) x;
 557   point->y = (int) y;
 558   wx_spline_point_list.Append((wxObject*)point);
 559   return TRUE;
 560 }
 561
 562 static void wx_spline_draw_point_array(wxDC *dc)
 563 {
 564   dc->DrawLines(&wx_spline_point_list, 0, 0 );
 565   wxNode *node = wx_spline_point_list.First();
 566   while (node)
 567   {
 568     wxPoint *point = (wxPoint *)node->Data();
 569     delete point;
 570     delete node;
 571     node = wx_spline_point_list.First();
 572   }
 573 }
 574
 575 void wxWindowDC::DrawSpline( wxList *points )
 576 {
 577     wxPoint *p;
 578     double           cx1, cy1, cx2, cy2, cx3, cy3, cx4, cy4;
 579     double           x1, y1, x2, y2;
 580
 581     wxNode *node = points->First();
 582     p = (wxPoint *)node->Data();
 583
 584     x1 = p->x;
 585     y1 = p->y;
 586
 587     node = node->Next();
 588     p = (wxPoint *)node->Data();
 589
 590     x2 = p->x;
 591     y2 = p->y;
 592     cx1 = (double)((x1 + x2) / 2);
 593     cy1 = (double)((y1 + y2) / 2);
 594     cx2 = (double)((cx1 + x2) / 2);
 595     cy2 = (double)((cy1 + y2) / 2);
 596
 597     wx_spline_add_point(x1, y1);
 598
 599     while ((node = node->Next()) != NULL)
 600     {
 601         p = (wxPoint *)node->Data();
 602         x1 = x2;
 603         y1 = y2;
 604         x2 = p->x;
 605         y2 = p->y;
 606         cx4 = (double)(x1 + x2) / 2;
 607         cy4 = (double)(y1 + y2) / 2;
 608         cx3 = (double)(x1 + cx4) / 2;
 609         cy3 = (double)(y1 + cy4) / 2;
 610
 611         wx_quadratic_spline(cx1, cy1, cx2, cy2, cx3, cy3, cx4, cy4);
 612
 613         cx1 = cx4;
 614         cy1 = cy4;
 615         cx2 = (double)(cx1 + x2) / 2;
 616         cy2 = (double)(cy1 + y2) / 2;
 617     }
 618
 619     wx_spline_add_point( cx1, cy1 );
 620     wx_spline_add_point( x2, y2 );
 621
 622     wx_spline_draw_point_array( this );
 623 };