src/os2/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 "wx/region.h"
  19 #include <math.h>
  20
  21 //-----------------------------------------------------------------------------
  22 // constants
  23 //-----------------------------------------------------------------------------
  24
  25 #define RAD2DEG 57.2957795131
  26
  27 //-----------------------------------------------------------------------------
  28 // wxPaintDC
  29 //-----------------------------------------------------------------------------
  30
  31 #if !USE_SHARED_LIBRARY
  32 IMPLEMENT_DYNAMIC_CLASS(wxWindowDC, wxDC)
  33 IMPLEMENT_DYNAMIC_CLASS(wxClientDC, wxWindowDC)
  34 IMPLEMENT_DYNAMIC_CLASS(wxPaintDC, wxWindowDC)
  35 #endif
  36
  37 /*
  38  * wxWindowDC
  39  */
  40
  41 wxWindowDC::wxWindowDC(void)
  42 {
  43 };
  44
  45 wxWindowDC::wxWindowDC( wxWindow *window )
  46 {
  47 };
  48
  49 wxWindowDC::~wxWindowDC(void)
  50 {
  51 };
  52
  53 void wxWindowDC::FloodFill( long WXUNUSED(x1), long WXUNUSED(y1),
  54   const wxColour& WXUNUSED(col), int WXUNUSED(style) )
  55 {
  56 };
  57
  58 bool wxWindowDC::GetPixel( long WXUNUSED(x1), long WXUNUSED(y1), wxColour *WXUNUSED(col) ) const
  59 {
  60   return FALSE;
  61 };
  62
  63 void wxWindowDC::DrawLine( long x1, long y1, long x2, long y2 )
  64 {
  65   if (!Ok()) return;
  66
  67 };
  68
  69 void wxWindowDC::CrossHair( long x, long y )
  70 {
  71   if (!Ok()) return;
  72
  73 };
  74
  75 void wxWindowDC::DrawArc( long x1, long y1, long x2, long y2, long xc, long yc )
  76 {
  77   if (!Ok()) return;
  78
  79   long xx1 = XLOG2DEV(x1);
  80   long yy1 = YLOG2DEV(y1);
  81   long xx2 = XLOG2DEV(x2);
  82   long yy2 = YLOG2DEV(y2);
  83   long xxc = XLOG2DEV((long)xc);
  84   long yyc = YLOG2DEV((long)yc);
  85   double dx = xx1 - xxc;
  86   double dy = yy1 - yyc;
  87   double radius = sqrt(dx*dx+dy*dy);
  88   long   r      = (long)radius;
  89   double radius1, radius2;
  90
  91   if (xx1 == xx2 && yy1 == yy2)
  92   {
  93     radius1 = 0.0;
  94     radius2 = 360.0;
  95   }
  96   else
  97   if (radius == 0.0)
  98   {
  99     radius1 = radius2 = 0.0;
 100   }
 101   else
 102   {
 103     radius1 = (xx1 - xxc == 0) ?
 104             (yy1 - yyc < 0) ? 90.0 : -90.0 :
 105             -atan2(double(yy1-yyc), double(xx1-xxc)) * RAD2DEG;
 106     radius2 = (xx2 - xxc == 0) ?
 107             (yy2 - yyc < 0) ? 90.0 : -90.0 :
 108             -atan2(double(yy2-yyc), double(xx2-xxc)) * RAD2DEG;
 109   };
 110   long alpha1 = long(radius1 * 64.0);
 111   long alpha2 = long((radius2 - radius1) * 64.0);
 112   while (alpha2 <= 0) alpha2 += 360*64;
 113   while (alpha1 > 360*64) alpha1 -= 360*64;
 114
 115   if (m_brush.GetStyle() != wxTRANSPARENT) {};
 116
 117   if (m_pen.GetStyle() != wxTRANSPARENT) {};
 118
 119 };
 120
 121 void wxWindowDC::DrawEllipticArc( long x, long y, long width, long height, double sa, double ea )
 122 {
 123   if (!Ok()) return;
 124
 125   long xx = XLOG2DEV(x);
 126   long yy = YLOG2DEV(y);
 127   long ww = m_signX * XLOG2DEVREL(width);
 128   long hh = m_signY * YLOG2DEVREL(height);
 129
 130   // CMB: handle -ve width and/or height
 131   if (ww < 0) { ww = -ww; xx = xx - ww; }
 132   if (hh < 0) { hh = -hh; yy = yy - hh; }
 133
 134   long start = long(sa * 64.0);
 135   long end = long(ea * 64.0);
 136   if (m_brush.GetStyle() != wxTRANSPARENT) {};
 137
 138   if (m_pen.GetStyle() != wxTRANSPARENT) {};
 139 };
 140
 141 void wxWindowDC::DrawPoint( long x, long y )
 142 {
 143   if (!Ok()) return;
 144
 145   if (m_pen.GetStyle() != wxTRANSPARENT) {};
 146 };
 147
 148 void wxWindowDC::DrawLines( int n, wxPoint points[], long xoffset, long yoffset )
 149 {
 150   if (!Ok()) return;
 151
 152   if (m_pen.GetStyle() == wxTRANSPARENT) return;
 153
 154   for (int i = 0; i < n-1; i++)
 155   {
 156     long x1 = XLOG2DEV(points[i].x + xoffset);
 157     long x2 = XLOG2DEV(points[i+1].x + xoffset);
 158     long y1 = YLOG2DEV(points[i].y + yoffset);     // oh, what a waste
 159     long y2 = YLOG2DEV(points[i+1].y + yoffset);
 160   };
 161 };
 162
 163 void wxWindowDC::DrawLines( wxList *points, long xoffset, long yoffset )
 164 {
 165   if (!Ok()) return;
 166
 167   if (m_pen.GetStyle() == wxTRANSPARENT) return;
 168
 169   wxNode *node = points->First();
 170   while (node->Next())
 171   {
 172     wxPoint *point = (wxPoint*)node->Data();
 173     wxPoint *npoint = (wxPoint*)node->Next()->Data();
 174     long x1 = XLOG2DEV(point->x + xoffset);
 175     long x2 = XLOG2DEV(npoint->x + xoffset);
 176     long y1 = YLOG2DEV(point->y + yoffset);    // and again...
 177     long y2 = YLOG2DEV(npoint->y + yoffset);
 178     node = node->Next();
 179   };
 180 };
 181
 182 void wxWindowDC::DrawPolygon( int WXUNUSED(n), wxPoint WXUNUSED(points)[],
 183   long WXUNUSED(xoffset), long WXUNUSED(yoffset), int WXUNUSED(fillStyle) )
 184 {
 185   if (!Ok()) return;
 186 };
 187
 188 void wxWindowDC::DrawPolygon( wxList *WXUNUSED(lines), long WXUNUSED(xoffset),
 189                              long WXUNUSED(yoffset), int WXUNUSED(fillStyle) )
 190 {
 191   if (!Ok()) return;
 192 };
 193
 194 void wxWindowDC::DrawRectangle( long x, long y, long width, long height )
 195 {
 196   if (!Ok()) return;
 197
 198   long xx = XLOG2DEV(x);
 199   long yy = YLOG2DEV(y);
 200   long ww = m_signX * XLOG2DEVREL(width);
 201   long hh = m_signY * YLOG2DEVREL(height);
 202
 203   // CMB: draw nothing if transformed w or h is 0
 204   if (ww == 0 || hh == 0) return;
 205
 206   // CMB: handle -ve width and/or height
 207   if (ww < 0) { ww = -ww; xx = xx - ww; }
 208   if (hh < 0) { hh = -hh; yy = yy - hh; }
 209
 210   if (m_brush.GetStyle() != wxTRANSPARENT) {};
 211
 212   if (m_pen.GetStyle() != wxTRANSPARENT) {};
 213 };
 214
 215 void wxWindowDC::DrawRoundedRectangle( long x, long y, long width, long height, double radius )
 216 {
 217   if (!Ok()) return;
 218
 219   if (radius < 0.0) radius = - radius * ((width < height) ? width : height);
 220
 221   long xx = XLOG2DEV(x);
 222   long yy = YLOG2DEV(y);
 223   long ww = m_signX * XLOG2DEVREL(width);
 224   long hh = m_signY * YLOG2DEVREL(height);
 225   long rr = XLOG2DEVREL((long)radius);
 226
 227   // CMB: handle -ve width and/or height
 228   if (ww < 0) { ww = -ww; xx = xx - ww; }
 229   if (hh < 0) { hh = -hh; yy = yy - hh; }
 230
 231   // CMB: if radius is zero use DrawRectangle() instead to avoid
 232   // X drawing errors with small radii
 233   if (rr == 0)
 234   {
 235     DrawRectangle( x, y, width, height );
 236     return;
 237   }
 238
 239   // CMB: draw nothing if transformed w or h is 0
 240   if (ww == 0 || hh == 0) return;
 241
 242   // CMB: adjust size if outline is drawn otherwise the result is
 243   // 1 pixel too wide and high
 244   if (m_pen.GetStyle() != wxTRANSPARENT)
 245   {
 246     ww--;
 247     hh--;
 248   }
 249
 250   // CMB: ensure dd is not larger than rectangle otherwise we
 251   // get an hour glass shape
 252   long dd = 2 * rr;
 253   if (dd > ww) dd = ww;
 254   if (dd > hh) dd = hh;
 255   rr = dd / 2;
 256
 257   if (m_brush.GetStyle() != wxTRANSPARENT)
 258   {
 259   };
 260
 261   if (m_pen.GetStyle() != wxTRANSPARENT)
 262   {
 263   };
 264 };
 265
 266 void wxWindowDC::DrawEllipse( long x, long y, long width, long height )
 267 {
 268   if (!Ok()) return;
 269
 270   long xx = XLOG2DEV(x);
 271   long yy = YLOG2DEV(y);
 272   long ww = m_signX * XLOG2DEVREL(width);
 273   long hh = m_signY * YLOG2DEVREL(height);
 274
 275   // CMB: handle -ve width and/or height
 276   if (ww < 0) { ww = -ww; xx = xx - ww; }
 277   if (hh < 0) { hh = -hh; yy = yy - hh; }
 278
 279   if (m_brush.GetStyle() != wxTRANSPARENT) {};
 280
 281   if (m_pen.GetStyle() != wxTRANSPARENT) {};
 282 };
 283
 284 bool wxWindowDC::CanDrawBitmap(void) const
 285 {
 286   return TRUE;
 287 };
 288
 289 void wxWindowDC::DrawIcon( const wxIcon &icon, long x, long y, bool useMask )
 290 {
 291   if (!Ok()) return;
 292
 293   if (!icon.Ok()) return;
 294
 295   int xx = XLOG2DEV(x);
 296   int yy = YLOG2DEV(y);
 297
 298 };
 299
 300 bool wxWindowDC::Blit( long xdest, long ydest, long width, long height,
 301        wxDC *source, long xsrc, long ysrc, int WXUNUSED(logical_func), bool WXUNUSED(useMask) )
 302 {
 303   if (!Ok()) return FALSE;
 304
 305   // CMB 20/5/98: add blitting of bitmaps
 306   if (source->IsKindOf(CLASSINFO(wxMemoryDC)))
 307   {
 308     wxMemoryDC* srcDC = (wxMemoryDC*)source;
 309     /*
 310      GdkBitmap* bmap = srcDC->m_selected.GetBitmap();
 311     if (bmap)
 312     {
 313       gdk_draw_bitmap (
 314           m_window,
 315           m_textGC,
 316           bmap,
 317           source->DeviceToLogicalX(xsrc), source->DeviceToLogicalY(ysrc),
 318           XLOG2DEV(xdest), YLOG2DEV(ydest),
 319           source->DeviceToLogicalXRel(width), source->DeviceToLogicalYRel(height)
 320           );
 321       return TRUE;
 322     }
 323     */
 324   }
 325
 326   return TRUE;
 327 };
 328
 329 void wxWindowDC::DrawText( const wxString &text, long x, long y, bool
 330 WXUNUSED(use16) )
 331 {
 332   if (!Ok()) return;
 333
 334 };
 335
 336
 337
 338 bool wxWindowDC::CanGetTextExtent(void) const
 339 {
 340   return TRUE;
 341 };
 342
 343 void wxWindowDC::GetTextExtent( const wxString &string, long *width, long *height,
 344                      long *WXUNUSED(descent), long *WXUNUSED(externalLeading),
 345                      wxFont *WXUNUSED(theFont), bool WXUNUSED(use16) ) const
 346 {
 347   if (!Ok()) return;
 348
 349 };
 350
 351 long wxWindowDC::GetCharWidth(void) const
 352 {
 353   if (!Ok()) return 0;
 354   return 0;
 355 };
 356
 357 long wxWindowDC::GetCharHeight(void) const
 358 {
 359   if (!Ok()) return 0;
 360   return 0;
 361 };
 362
 363 void wxWindowDC::Clear(void)
 364 {
 365   if (!Ok()) return;
 366
 367 };
 368
 369 void wxWindowDC::SetFont( const wxFont &font )
 370 {
 371   if (!Ok()) return;
 372
 373   m_font = font;
 374 };
 375
 376 void wxWindowDC::SetPen( const wxPen &pen )
 377 {
 378   if (!Ok()) return;
 379
 380   if (m_pen == pen) return;
 381
 382   m_pen = pen;
 383
 384   if (!m_pen.Ok()) return;
 385 };
 386
 387 void wxWindowDC::SetBrush( const wxBrush &brush )
 388 {
 389   if (!Ok()) return;
 390
 391   if (m_brush == brush) return;
 392
 393   m_brush = brush;
 394
 395   if (!m_brush.Ok()) return;
 396
 397 };
 398
 399 void wxWindowDC::SetBackground( const wxBrush &brush )
 400 {
 401   if (!Ok()) return;
 402
 403   if (m_backgroundBrush == brush) return;
 404
 405   m_backgroundBrush = brush;
 406
 407   if (!m_backgroundBrush.Ok()) return;
 408
 409 };
 410
 411 void wxWindowDC::SetLogicalFunction( int function )
 412 {
 413   if (m_logicalFunction == function) return;
 414 };
 415
 416 void wxWindowDC::SetTextForeground( const wxColour &col )
 417 {
 418   if (!Ok()) return;
 419
 420   if (m_textForegroundColour == col) return;
 421
 422   m_textForegroundColour = col;
 423   if (!m_textForegroundColour.Ok()) return;
 424 };
 425
 426 void wxWindowDC::SetTextBackground( const wxColour &col )
 427 {
 428   if (!Ok()) return;
 429
 430   if (m_textBackgroundColour == col) return;
 431
 432   m_textBackgroundColour = col;
 433   if (!m_textBackgroundColour.Ok()) return;
 434 };
 435
 436 void wxWindowDC::SetBackgroundMode( int mode )
 437 {
 438   m_backgroundMode = mode;
 439
 440   if (m_brush.GetStyle() != wxSOLID && m_brush.GetStyle() != wxTRANSPARENT)
 441   {
 442   }
 443 };
 444
 445 void wxWindowDC::SetPalette( const wxPalette& WXUNUSED(palette) )
 446 {
 447 };
 448
 449 void wxWindowDC::SetClippingRegion( long x, long y, long width, long height )
 450 {
 451   wxDC::SetClippingRegion( x, y, width, height );
 452
 453   // TODO
 454
 455 };
 456
 457 void wxWindowDC::SetClippingRegion( const wxRegion& region )
 458 {
 459   wxRect box = region.GetBox();
 460
 461   wxDC::SetClippingRegion( box.x, box.y, box.width, box.height );
 462
 463   // TODO
 464 }
 465
 466 void wxWindowDC::DestroyClippingRegion(void)
 467 {
 468   wxDC::DestroyClippingRegion();
 469
 470 };
 471
 472 // ----------------------------------- spline code ----------------------------------------
 473
 474 void wx_quadratic_spline(double a1, double b1, double a2, double b2,
 475                          double a3, double b3, double a4, double b4);
 476 void wx_clear_stack(void);
 477 int wx_spline_pop(double *x1, double *y1, double *x2, double *y2, double *x3,
 478         double *y3, double *x4, double *y4);
 479 void wx_spline_push(double x1, double y1, double x2, double y2, double x3, double y3,
 480           double x4, double y4);
 481 static bool wx_spline_add_point(double x, double y);
 482 static void wx_spline_draw_point_array(wxDC *dc);
 483
 484 wxList wx_spline_point_list;
 485
 486 #define         half(z1, z2)    ((z1+z2)/2.0)
 487 #define         THRESHOLD       5
 488
 489 /* iterative version */
 490
 491 void wx_quadratic_spline(double a1, double b1, double a2, double b2, double a3, double b3, double a4,
 492                  double b4)
 493 {
 494     register double  xmid, ymid;
 495     double           x1, y1, x2, y2, x3, y3, x4, y4;
 496
 497     wx_clear_stack();
 498     wx_spline_push(a1, b1, a2, b2, a3, b3, a4, b4);
 499
 500     while (wx_spline_pop(&x1, &y1, &x2, &y2, &x3, &y3, &x4, &y4)) {
 501         xmid = (double)half(x2, x3);
 502         ymid = (double)half(y2, y3);
 503         if (fabs(x1 - xmid) < THRESHOLD && fabs(y1 - ymid) < THRESHOLD &&
 504             fabs(xmid - x4) < THRESHOLD && fabs(ymid - y4) < THRESHOLD) {
 505             wx_spline_add_point( x1, y1 );
 506             wx_spline_add_point( xmid, ymid );
 507         } else {
 508             wx_spline_push(xmid, ymid, (double)half(xmid, x3), (double)half(ymid, y3),
 509                  (double)half(x3, x4), (double)half(y3, y4), x4, y4);
 510             wx_spline_push(x1, y1, (double)half(x1, x2), (double)half(y1, y2),
 511                  (double)half(x2, xmid), (double)half(y2, ymid), xmid, ymid);
 512         }
 513     }
 514 }
 515
 516 /* utilities used by spline drawing routines */
 517
 518 typedef struct wx_spline_stack_struct {
 519     double           x1, y1, x2, y2, x3, y3, x4, y4;
 520 } Stack;
 521
 522 #define         SPLINE_STACK_DEPTH             20
 523 static Stack    wx_spline_stack[SPLINE_STACK_DEPTH];
 524 static Stack   *wx_stack_top;
 525 static int      wx_stack_count;
 526
 527 void wx_clear_stack(void)
 528 {
 529     wx_stack_top = wx_spline_stack;
 530     wx_stack_count = 0;
 531 }
 532
 533 void wx_spline_push(double x1, double y1, double x2, double y2, double x3, double y3, double x4, double y4)
 534 {
 535     wx_stack_top->x1 = x1;
 536     wx_stack_top->y1 = y1;
 537     wx_stack_top->x2 = x2;
 538     wx_stack_top->y2 = y2;
 539     wx_stack_top->x3 = x3;
 540     wx_stack_top->y3 = y3;
 541     wx_stack_top->x4 = x4;
 542     wx_stack_top->y4 = y4;
 543     wx_stack_top++;
 544     wx_stack_count++;
 545 }
 546
 547 int wx_spline_pop(double *x1, double *y1, double *x2, double *y2,
 548                   double *x3, double *y3, double *x4, double *y4)
 549 {
 550     if (wx_stack_count == 0)
 551         return (0);
 552     wx_stack_top--;
 553     wx_stack_count--;
 554     *x1 = wx_stack_top->x1;
 555     *y1 = wx_stack_top->y1;
 556     *x2 = wx_stack_top->x2;
 557     *y2 = wx_stack_top->y2;
 558     *x3 = wx_stack_top->x3;
 559     *y3 = wx_stack_top->y3;
 560     *x4 = wx_stack_top->x4;
 561     *y4 = wx_stack_top->y4;
 562     return (1);
 563 }
 564
 565 static bool wx_spline_add_point(double x, double y)
 566 {
 567   wxPoint *point = new wxPoint ;
 568   point->x = (int) x;
 569   point->y = (int) y;
 570   wx_spline_point_list.Append((wxObject*)point);
 571   return TRUE;
 572 }
 573
 574 static void wx_spline_draw_point_array(wxDC *dc)
 575 {
 576   dc->DrawLines(&wx_spline_point_list, 0, 0 );
 577   wxNode *node = wx_spline_point_list.First();
 578   while (node)
 579   {
 580     wxPoint *point = (wxPoint *)node->Data();
 581     delete point;
 582     delete node;
 583     node = wx_spline_point_list.First();
 584   }
 585 }
 586
 587 void wxWindowDC::DrawSpline( wxList *points )
 588 {
 589     wxPoint *p;
 590     double           cx1, cy1, cx2, cy2, cx3, cy3, cx4, cy4;
 591     double           x1, y1, x2, y2;
 592
 593     wxNode *node = points->First();
 594     p = (wxPoint *)node->Data();
 595
 596     x1 = p->x;
 597     y1 = p->y;
 598
 599     node = node->Next();
 600     p = (wxPoint *)node->Data();
 601
 602     x2 = p->x;
 603     y2 = p->y;
 604     cx1 = (double)((x1 + x2) / 2);
 605     cy1 = (double)((y1 + y2) / 2);
 606     cx2 = (double)((cx1 + x2) / 2);
 607     cy2 = (double)((cy1 + y2) / 2);
 608
 609     wx_spline_add_point(x1, y1);
 610
 611     while ((node = node->Next()) != NULL)
 612     {
 613         p = (wxPoint *)node->Data();
 614         x1 = x2;
 615         y1 = y2;
 616         x2 = p->x;
 617         y2 = p->y;
 618         cx4 = (double)(x1 + x2) / 2;
 619         cy4 = (double)(y1 + y2) / 2;
 620         cx3 = (double)(x1 + cx4) / 2;
 621         cy3 = (double)(y1 + cy4) / 2;
 622
 623         wx_quadratic_spline(cx1, cy1, cx2, cy2, cx3, cy3, cx4, cy4);
 624
 625         cx1 = cx4;
 626         cy1 = cy4;
 627         cx2 = (double)(cx1 + x2) / 2;
 628         cy2 = (double)(cy1 + y2) / 2;
 629     }
 630
 631     wx_spline_add_point( cx1, cy1 );
 632     wx_spline_add_point( x2, y2 );
 633
 634     wx_spline_draw_point_array( this );
 635 };