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