src/gtk/dcclient.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        dcclient.cpp
   3 // Purpose:
   4 // Author:      Robert Roebling
   5 // RCS-ID:      $Id$
   6 // Copyright:   (c) 1998 Robert Roebling, Markus Holzem, Chris Breeze
   7 // Licence:     wxWindows licence
   8 /////////////////////////////////////////////////////////////////////////////
   9
  10 #ifdef __GNUG__
  11 #pragma implementation "dcclient.h"
  12 #endif
  13
  14 #include "wx/dcclient.h"
  15 #include "wx/dcmemory.h"
  16 #include "wx/image.h"
  17 #include <math.h>
  18
  19 //-----------------------------------------------------------------------------
  20 // local data
  21 //-----------------------------------------------------------------------------
  22
  23 #include "bdiag.xbm"
  24 #include "fdiag.xbm"
  25 #include "cdiag.xbm"
  26 #include "horiz.xbm"
  27 #include "verti.xbm"
  28 #include "cross.xbm"
  29 #define  num_hatches 6
  30
  31 static GdkPixmap  *hatches[num_hatches];
  32 static GdkPixmap **hatch_bitmap = (GdkPixmap **) NULL;
  33
  34 //-----------------------------------------------------------------------------
  35 // constants
  36 //-----------------------------------------------------------------------------
  37
  38 #define RAD2DEG 57.2957795131
  39
  40 //-----------------------------------------------------------------------------
  41 // temporary implementation of the missing GDK function
  42 //-----------------------------------------------------------------------------
  43 #include "gdk/gdkprivate.h"
  44 void gdk_draw_bitmap     (GdkDrawable  *drawable,
  45                           GdkGC        *gc,
  46                           GdkDrawable  *src,
  47                           gint          xsrc,
  48                           gint          ysrc,
  49                           gint          xdest,
  50                           gint          ydest,
  51                           gint          width,
  52                           gint          height)
  53 {
  54     GdkWindowPrivate *drawable_private;
  55     GdkWindowPrivate *src_private;
  56     GdkGCPrivate *gc_private;
  57
  58     g_return_if_fail (drawable != NULL);
  59     g_return_if_fail (src != NULL);
  60     g_return_if_fail (gc != NULL);
  61
  62     drawable_private = (GdkWindowPrivate*) drawable;
  63     src_private = (GdkWindowPrivate*) src;
  64     if (drawable_private->destroyed || src_private->destroyed)
  65         return;
  66
  67     gc_private = (GdkGCPrivate*) gc;
  68
  69     if (width == -1) width = src_private->width;
  70     if (height == -1) height = src_private->height;
  71
  72     XCopyPlane( drawable_private->xdisplay,
  73                 src_private->xwindow,
  74                 drawable_private->xwindow,
  75                 gc_private->xgc,
  76                 xsrc, ysrc,
  77                 width, height,
  78                 xdest, ydest,
  79                 1 );
  80 }
  81
  82 //-----------------------------------------------------------------------------
  83 // wxWindowDC
  84 //-----------------------------------------------------------------------------
  85
  86 IMPLEMENT_DYNAMIC_CLASS(wxWindowDC,wxDC)
  87
  88 wxWindowDC::wxWindowDC()
  89 {
  90     m_penGC = (GdkGC *) NULL;
  91     m_brushGC = (GdkGC *) NULL;
  92     m_textGC = (GdkGC *) NULL;
  93     m_bgGC = (GdkGC *) NULL;
  94     m_cmap = (GdkColormap *) NULL;
  95     m_isMemDC = FALSE;
  96 }
  97
  98 wxWindowDC::wxWindowDC( wxWindow *window )
  99 {
 100     m_penGC = (GdkGC *) NULL;
 101     m_brushGC = (GdkGC *) NULL;
 102     m_textGC = (GdkGC *) NULL;
 103     m_bgGC = (GdkGC *) NULL;
 104     m_cmap = (GdkColormap *) NULL;
 105
 106     if (!window) return;
 107     GtkWidget *widget = window->m_wxwindow;
 108     if (!widget) return;
 109     m_window = widget->window;
 110     if (!m_window) return;
 111     if (window->m_wxwindow)
 112         m_cmap = gtk_widget_get_colormap( window->m_wxwindow );
 113     else
 114         m_cmap = gtk_widget_get_colormap( window->m_widget );
 115
 116     m_isMemDC = FALSE;
 117
 118     SetUpDC();
 119
 120 }
 121
 122 wxWindowDC::~wxWindowDC()
 123 {
 124     Destroy();
 125 }
 126
 127 void wxWindowDC::FloodFill( long WXUNUSED(x), long WXUNUSED(y),
 128                            const wxColour &WXUNUSED(col), int WXUNUSED(style) )
 129 {
 130     wxFAIL_MSG( "wxWindowDC::FloodFill not implemented" );
 131 }
 132
 133 bool wxWindowDC::GetPixel( long WXUNUSED(x1), long WXUNUSED(y1), wxColour *WXUNUSED(col) ) const
 134 {
 135     wxFAIL_MSG( "wxWindowDC::GetPixel not implemented" );
 136     return FALSE;
 137 }
 138
 139 void wxWindowDC::DrawLine( long x1, long y1, long x2, long y2 )
 140 {
 141     wxCHECK_RET( Ok(), "invalid window dc" );
 142
 143     if (m_pen.GetStyle() != wxTRANSPARENT)
 144     {
 145         gdk_draw_line( m_window, m_penGC,
 146                        XLOG2DEV(x1), YLOG2DEV(y1), XLOG2DEV(x2), YLOG2DEV(y2) );
 147
 148         CalcBoundingBox(x1, y1);
 149         CalcBoundingBox(x2, y2);
 150     }
 151 }
 152
 153 void wxWindowDC::CrossHair( long x, long y )
 154 {
 155     wxCHECK_RET( Ok(), "invalid window dc" );
 156
 157     if (m_pen.GetStyle() != wxTRANSPARENT)
 158     {
 159         int w = 0;
 160         int h = 0;
 161         GetSize( &w, &h );
 162         long xx = XLOG2DEV(x);
 163         long yy = YLOG2DEV(y);
 164         gdk_draw_line( m_window, m_penGC, 0, yy, XLOG2DEVREL(w), yy );
 165         gdk_draw_line( m_window, m_penGC, xx, 0, xx, YLOG2DEVREL(h) );
 166     }
 167 }
 168
 169 void wxWindowDC::DrawArc( long x1, long y1, long x2, long y2, double xc, double yc )
 170 {
 171     wxCHECK_RET( Ok(), "invalid window dc" );
 172
 173     long xx1 = XLOG2DEV(x1);
 174     long yy1 = YLOG2DEV(y1);
 175     long xx2 = XLOG2DEV(x2);
 176     long yy2 = YLOG2DEV(y2);
 177     long xxc = XLOG2DEV((long)xc);
 178     long yyc = YLOG2DEV((long)yc);
 179     double dx = xx1 - xxc;
 180     double dy = yy1 - yyc;
 181     double radius = sqrt(dx*dx+dy*dy);
 182     long   r      = (long)radius;
 183     double radius1, radius2;
 184
 185     if (xx1 == xx2 && yy1 == yy2)
 186     {
 187         radius1 = 0.0;
 188         radius2 = 360.0;
 189     }
 190     else
 191     if (radius == 0.0)
 192     {
 193         radius1 = radius2 = 0.0;
 194     }
 195     else
 196     {
 197         radius1 = (xx1 - xxc == 0) ?
 198             (yy1 - yyc < 0) ? 90.0 : -90.0 :
 199             -atan2(double(yy1-yyc), double(xx1-xxc)) * RAD2DEG;
 200         radius2 = (xx2 - xxc == 0) ?
 201             (yy2 - yyc < 0) ? 90.0 : -90.0 :
 202             -atan2(double(yy2-yyc), double(xx2-xxc)) * RAD2DEG;
 203     }
 204     long alpha1 = long(radius1 * 64.0);
 205     long alpha2 = long((radius2 - radius1) * 64.0);
 206     while (alpha2 <= 0) alpha2 += 360*64;
 207     while (alpha1 > 360*64) alpha1 -= 360*64;
 208
 209     if (m_brush.GetStyle() != wxTRANSPARENT)
 210         gdk_draw_arc( m_window, m_brushGC, TRUE, xxc-r, yyc-r, 2*r,2*r, alpha1, alpha2 );
 211
 212     if (m_pen.GetStyle() != wxTRANSPARENT)
 213         gdk_draw_arc( m_window, m_penGC, FALSE, xxc-r, yyc-r, 2*r,2*r, alpha1, alpha2 );
 214
 215     CalcBoundingBox (x1, y1);
 216     CalcBoundingBox (x2, y2);
 217 }
 218
 219 void wxWindowDC::DrawEllipticArc( long x, long y, long width, long height, double sa, double ea )
 220 {
 221     wxCHECK_RET( Ok(), "invalid window dc" );
 222
 223     long xx = XLOG2DEV(x);
 224     long yy = YLOG2DEV(y);
 225     long ww = m_signX * XLOG2DEVREL(width);
 226     long hh = m_signY * YLOG2DEVREL(height);
 227
 228     // CMB: handle -ve width and/or height
 229     if (ww < 0) { ww = -ww; xx = xx - ww; }
 230     if (hh < 0) { hh = -hh; yy = yy - hh; }
 231
 232     long start = long(sa * 64.0);
 233     long end = long(ea * 64.0);
 234     if (m_brush.GetStyle() != wxTRANSPARENT)
 235         gdk_draw_arc( m_window, m_brushGC, TRUE, xx, yy, ww, hh, start, end );
 236
 237     if (m_pen.GetStyle() != wxTRANSPARENT)
 238         gdk_draw_arc( m_window, m_penGC, FALSE, xx, yy, ww, hh, start, end );
 239
 240     CalcBoundingBox (x, y);
 241     CalcBoundingBox (x + width, y + height);
 242 }
 243
 244 void wxWindowDC::DrawPoint( long x, long y )
 245 {
 246     wxCHECK_RET( Ok(), "invalid window dc" );
 247
 248     if (m_pen.GetStyle() != wxTRANSPARENT)
 249         gdk_draw_point( m_window, m_penGC, XLOG2DEV(x), YLOG2DEV(y) );
 250
 251     CalcBoundingBox (x, y);
 252 }
 253
 254 void wxWindowDC::DrawLines( int n, wxPoint points[], long xoffset, long yoffset )
 255 {
 256     wxCHECK_RET( Ok(), "invalid window dc" );
 257
 258     if (m_pen.GetStyle() == wxTRANSPARENT) return;
 259     if (n <= 0) return;
 260
 261     CalcBoundingBox( points[0].x + xoffset, points[0].y + yoffset );
 262
 263     for (int i = 0; i < n-1; i++)
 264     {
 265         long x1 = XLOG2DEV(points[i].x + xoffset);
 266         long x2 = XLOG2DEV(points[i+1].x + xoffset);
 267         long y1 = YLOG2DEV(points[i].y + yoffset);     // oh, what a waste
 268         long y2 = YLOG2DEV(points[i+1].y + yoffset);
 269         gdk_draw_line( m_window, m_penGC, x1, y1, x2, y2 );
 270
 271         CalcBoundingBox( points[i+1].x + xoffset, points[i+1].y + yoffset );
 272     }
 273 }
 274
 275 void wxWindowDC::DrawLines( wxList *points, long xoffset, long yoffset )
 276 {
 277     wxCHECK_RET( Ok(), "invalid window dc" );
 278
 279     if (m_pen.GetStyle() == wxTRANSPARENT) return;
 280
 281     wxNode *node = points->First();
 282     if (!node) return;
 283
 284     wxPoint *pt = (wxPoint*)node->Data();
 285     CalcBoundingBox( pt->x + xoffset, pt->y + yoffset );
 286
 287     while (node->Next())
 288     {
 289         wxPoint *point = (wxPoint*)node->Data();
 290         wxPoint *npoint = (wxPoint*)node->Next()->Data();
 291         long x1 = XLOG2DEV(point->x + xoffset);
 292         long x2 = XLOG2DEV(npoint->x + xoffset);
 293         long y1 = YLOG2DEV(point->y + yoffset);    // and a waste again...
 294         long y2 = YLOG2DEV(npoint->y + yoffset);
 295         gdk_draw_line( m_window, m_penGC, x1, y1, x2, y2 );
 296         node = node->Next();
 297
 298         CalcBoundingBox( npoint->x + xoffset, npoint->y + yoffset );
 299     }
 300 }
 301
 302 void wxWindowDC::DrawPolygon( int n, wxPoint points[], long xoffset, long yoffset, int WXUNUSED(fillStyle) )
 303 {
 304     wxCHECK_RET( Ok(), "invalid window dc" );
 305
 306     if (n <= 0) return;
 307
 308     GdkPoint *gdkpoints = new GdkPoint[n+1];
 309     int i;
 310     for (i = 0 ; i < n ; i++)
 311     {
 312         gdkpoints[i].x = XLOG2DEV(points[i].x + xoffset);
 313         gdkpoints[i].y = YLOG2DEV(points[i].y + yoffset);
 314
 315         CalcBoundingBox( points[i].x + xoffset, points[i].y + yoffset );
 316     }
 317
 318     if (m_brush.GetStyle() != wxTRANSPARENT)
 319         gdk_draw_polygon (m_window, m_brushGC, TRUE, gdkpoints, n);
 320
 321     // To do: Fillstyle
 322
 323     if (m_pen.GetStyle() != wxTRANSPARENT)
 324         for (i = 0 ; i < n ; i++)
 325         {
 326             gdk_draw_line( m_window, m_penGC,
 327                            gdkpoints[i%n].x,
 328                            gdkpoints[i%n].y,
 329                            gdkpoints[(i+1)%n].x,
 330                            gdkpoints[(i+1)%n].y);
 331         }
 332
 333     delete[] gdkpoints;
 334 }
 335
 336 void wxWindowDC::DrawPolygon( wxList *lines, long xoffset, long yoffset, int WXUNUSED(fillStyle))
 337 {
 338     wxCHECK_RET( Ok(), "invalid window dc" );
 339
 340     int n = lines->Number();
 341     if (n <= 0) return;
 342
 343     GdkPoint *gdkpoints = new GdkPoint[n];
 344     wxNode *node = lines->First();
 345     int cnt = 0;
 346     while (node)
 347     {
 348         wxPoint *p = (wxPoint *) node->Data();
 349         gdkpoints[cnt].x = XLOG2DEV(p->x + xoffset);
 350         gdkpoints[cnt].y = YLOG2DEV(p->y + yoffset);
 351         node = node->Next();
 352         cnt++;
 353
 354         CalcBoundingBox( p->x + xoffset, p->y + yoffset );
 355     }
 356
 357     if (m_brush.GetStyle() != wxTRANSPARENT)
 358         gdk_draw_polygon (m_window, m_brushGC, TRUE, gdkpoints, n);
 359
 360     // To do: Fillstyle
 361
 362     if (m_pen.GetStyle() != wxTRANSPARENT)
 363     {
 364         int i;
 365         for (i = 0 ; i < n ; i++)
 366         {
 367             gdk_draw_line( m_window, m_penGC,
 368                            gdkpoints[i%n].x,
 369                            gdkpoints[i%n].y,
 370                            gdkpoints[(i+1)%n].x,
 371                            gdkpoints[(i+1)%n].y );
 372         }
 373     }
 374     delete[] gdkpoints;
 375 }
 376
 377 void wxWindowDC::DrawRectangle( long x, long y, long width, long height )
 378 {
 379     wxCHECK_RET( Ok(), "invalid window dc" );
 380
 381     long xx = XLOG2DEV(x);
 382     long yy = YLOG2DEV(y);
 383     long ww = m_signX * XLOG2DEVREL(width);
 384     long hh = m_signY * YLOG2DEVREL(height);
 385
 386     // CMB: draw nothing if transformed w or h is 0
 387     if (ww == 0 || hh == 0) return;
 388
 389     // CMB: handle -ve width and/or height
 390     if (ww < 0) { ww = -ww; xx = xx - ww; }
 391     if (hh < 0) { hh = -hh; yy = yy - hh; }
 392
 393     if (m_brush.GetStyle() != wxTRANSPARENT)
 394       gdk_draw_rectangle( m_window, m_brushGC, TRUE, xx, yy, ww, hh );
 395
 396     if (m_pen.GetStyle() != wxTRANSPARENT)
 397       gdk_draw_rectangle( m_window, m_penGC, FALSE, xx, yy, ww-1, hh-1 );
 398
 399     CalcBoundingBox( x, y );
 400     CalcBoundingBox( x + width, y + height );
 401 }
 402
 403 void wxWindowDC::DrawRoundedRectangle( long x, long y, long width, long height, double radius )
 404 {
 405     wxCHECK_RET( Ok(), "invalid window dc" );
 406
 407     if (radius < 0.0) radius = - radius * ((width < height) ? width : height);
 408
 409     long xx = XLOG2DEV(x);
 410     long yy = YLOG2DEV(y);
 411     long ww = m_signX * XLOG2DEVREL(width);
 412     long hh = m_signY * YLOG2DEVREL(height);
 413     long rr = XLOG2DEVREL((long)radius);
 414
 415     // CMB: handle -ve width and/or height
 416     if (ww < 0) { ww = -ww; xx = xx - ww; }
 417     if (hh < 0) { hh = -hh; yy = yy - hh; }
 418
 419     // CMB: if radius is zero use DrawRectangle() instead to avoid
 420     // X drawing errors with small radii
 421     if (rr == 0)
 422     {
 423         DrawRectangle( x, y, width, height );
 424         return;
 425     }
 426
 427     // CMB: draw nothing if transformed w or h is 0
 428     if (ww == 0 || hh == 0) return;
 429
 430     // CMB: adjust size if outline is drawn otherwise the result is
 431     // 1 pixel too wide and high
 432     if (m_pen.GetStyle() != wxTRANSPARENT)
 433     {
 434         ww--;
 435         hh--;
 436     }
 437
 438     // CMB: ensure dd is not larger than rectangle otherwise we
 439     // get an hour glass shape
 440     long dd = 2 * rr;
 441     if (dd > ww) dd = ww;
 442     if (dd > hh) dd = hh;
 443     rr = dd / 2;
 444
 445     if (m_brush.GetStyle() != wxTRANSPARENT)
 446     {
 447         gdk_draw_rectangle( m_window, m_brushGC, TRUE, xx+rr, yy, ww-dd+1, hh );
 448         gdk_draw_rectangle( m_window, m_brushGC, TRUE, xx, yy+rr, ww, hh-dd+1 );
 449         gdk_draw_arc( m_window, m_brushGC, TRUE, xx, yy, dd, dd, 90*64, 90*64 );
 450         gdk_draw_arc( m_window, m_brushGC, TRUE, xx+ww-dd, yy, dd, dd, 0, 90*64 );
 451         gdk_draw_arc( m_window, m_brushGC, TRUE, xx+ww-dd, yy+hh-dd, dd, dd, 270*64, 90*64 );
 452         gdk_draw_arc( m_window, m_brushGC, TRUE, xx, yy+hh-dd, dd, dd, 180*64, 90*64 );
 453     }
 454
 455     if (m_pen.GetStyle() != wxTRANSPARENT)
 456     {
 457         gdk_draw_line( m_window, m_penGC, xx+rr, yy, xx+ww-rr, yy );
 458         gdk_draw_line( m_window, m_penGC, xx+rr, yy+hh, xx+ww-rr, yy+hh );
 459         gdk_draw_line( m_window, m_penGC, xx, yy+rr, xx, yy+hh-rr );
 460         gdk_draw_line( m_window, m_penGC, xx+ww, yy+rr, xx+ww, yy+hh-rr );
 461         gdk_draw_arc( m_window, m_penGC, FALSE, xx, yy, dd, dd, 90*64, 90*64 );
 462         gdk_draw_arc( m_window, m_penGC, FALSE, xx+ww-dd, yy, dd, dd, 0, 90*64 );
 463         gdk_draw_arc( m_window, m_penGC, FALSE, xx+ww-dd, yy+hh-dd, dd, dd, 270*64, 90*64 );
 464         gdk_draw_arc( m_window, m_penGC, FALSE, xx, yy+hh-dd, dd, dd, 180*64, 90*64 );
 465     }
 466
 467     // this ignores the radius
 468     CalcBoundingBox( x, y );
 469     CalcBoundingBox( x + width, y + height );
 470 }
 471
 472 void wxWindowDC::DrawEllipse( long x, long y, long width, long height )
 473 {
 474     wxCHECK_RET( Ok(), "invalid window dc" );
 475
 476     long xx = XLOG2DEV(x);
 477     long yy = YLOG2DEV(y);
 478     long ww = m_signX * XLOG2DEVREL(width);
 479     long hh = m_signY * YLOG2DEVREL(height);
 480
 481     // CMB: handle -ve width and/or height
 482     if (ww < 0) { ww = -ww; xx = xx - ww; }
 483     if (hh < 0) { hh = -hh; yy = yy - hh; }
 484
 485     if (m_brush.GetStyle() != wxTRANSPARENT)
 486         gdk_draw_arc( m_window, m_brushGC, TRUE, xx, yy, ww, hh, 0, 360*64 );
 487
 488     if (m_pen.GetStyle() != wxTRANSPARENT)
 489         gdk_draw_arc( m_window, m_penGC, FALSE, xx, yy, ww, hh, 0, 360*64 );
 490
 491     CalcBoundingBox( x - width, y - height );
 492     CalcBoundingBox( x + width, y + height );
 493 }
 494
 495 bool wxWindowDC::CanDrawBitmap() const
 496 {
 497     return TRUE;
 498 }
 499
 500 void wxWindowDC::DrawIcon( const wxIcon &icon, long x, long y )
 501 {
 502     DrawBitmap( icon, x, y, TRUE );
 503 }
 504
 505 void wxWindowDC::DrawBitmap( const wxBitmap &bitmap, long x, long y, bool useMask )
 506 {
 507     wxCHECK_RET( Ok(), "invalid window dc" );
 508
 509     if (!bitmap.Ok()) return;
 510
 511     int xx = XLOG2DEV(x);
 512     int yy = YLOG2DEV(y);
 513
 514     int w = bitmap.GetWidth();
 515     int h = bitmap.GetHeight();
 516
 517     int ww = XLOG2DEVREL(w);
 518     int hh = YLOG2DEVREL(h);
 519
 520     wxBitmap use_bitmap;
 521
 522     if ((w != ww) || (h != hh))
 523     {
 524         wxImage image( bitmap );
 525         image = image.Scale( ww, hh );
 526
 527         use_bitmap = image.ConvertToBitmap();
 528     }
 529     else
 530     {
 531         use_bitmap = bitmap;
 532     }
 533
 534     GdkBitmap *mask = (GdkBitmap *) NULL;
 535     if (use_bitmap.GetMask()) mask = use_bitmap.GetMask()->GetBitmap();
 536
 537     if (useMask && mask)
 538     {
 539         gdk_gc_set_clip_mask( m_penGC, mask );
 540         gdk_gc_set_clip_origin( m_penGC, xx, yy );
 541     }
 542
 543     GdkPixmap *pm = use_bitmap.GetPixmap();
 544     gdk_draw_pixmap( m_window, m_penGC, pm, 0, 0, xx, yy, -1, -1 );
 545
 546     if (useMask && mask)
 547     {
 548         gdk_gc_set_clip_mask( m_penGC, (GdkBitmap *) NULL );
 549         gdk_gc_set_clip_origin( m_penGC, 0, 0 );
 550     }
 551
 552     CalcBoundingBox( x, y );
 553     CalcBoundingBox( x + w, y + h );
 554 }
 555
 556 bool wxWindowDC::Blit( long xdest, long ydest, long width, long height,
 557        wxDC *source, long xsrc, long ysrc, int logical_func, bool useMask )
 558 {
 559     wxCHECK_MSG( Ok(), FALSE, "invalid window dc" );
 560
 561     CalcBoundingBox( xdest, ydest );
 562     CalcBoundingBox( xdest + width, ydest + height );
 563
 564     int old_logical_func = m_logicalFunction;
 565     SetLogicalFunction( logical_func );
 566
 567     wxClientDC *csrc = (wxClientDC*)source;
 568
 569     if (csrc->m_isMemDC)
 570     {
 571         wxMemoryDC* srcDC = (wxMemoryDC*)source;
 572         GdkPixmap* pmap = srcDC->m_selected.GetPixmap();
 573         if (pmap)
 574         {
 575             long xx = XLOG2DEV(xdest);
 576             long yy = YLOG2DEV(ydest);
 577
 578             GdkBitmap *mask = (GdkBitmap *) NULL;
 579             if (srcDC->m_selected.GetMask()) mask = srcDC->m_selected.GetMask()->GetBitmap();
 580
 581             if (useMask && mask)
 582             {
 583                 gdk_gc_set_clip_mask( m_penGC, mask );
 584                 gdk_gc_set_clip_origin( m_penGC, xx, yy );
 585             }
 586
 587             gdk_draw_pixmap( m_window, m_penGC, pmap,
 588                              source->DeviceToLogicalX(xsrc),
 589                              source->DeviceToLogicalY(ysrc),
 590                              xx,
 591                              yy,
 592                              source->DeviceToLogicalXRel(width),
 593                              source->DeviceToLogicalYRel(height) );
 594
 595             if (useMask && mask)
 596             {
 597                 gdk_gc_set_clip_mask( m_penGC, (GdkBitmap *) NULL );
 598                 gdk_gc_set_clip_origin( m_penGC, 0, 0 );
 599             }
 600
 601             SetLogicalFunction( old_logical_func );
 602             return TRUE;
 603         }
 604
 605         GdkBitmap* bmap = srcDC->m_selected.GetBitmap();
 606         if (bmap)
 607         {
 608             long xx = XLOG2DEV(xdest);
 609             long yy = YLOG2DEV(ydest);
 610
 611             GdkBitmap *mask = (GdkBitmap *) NULL;
 612             if (srcDC->m_selected.GetMask()) mask = srcDC->m_selected.GetMask()->GetBitmap();
 613
 614             if (useMask && mask)
 615             {
 616                 gdk_gc_set_clip_mask( m_penGC, mask );
 617                 gdk_gc_set_clip_origin( m_penGC, xx, yy );
 618             }
 619
 620             gdk_draw_bitmap( m_window, m_textGC, bmap,
 621                              source->DeviceToLogicalX(xsrc),
 622                              source->DeviceToLogicalY(ysrc),
 623                              xx,
 624                              yy,
 625                              source->DeviceToLogicalXRel(width),
 626                              source->DeviceToLogicalYRel(height) );
 627
 628             if (useMask && mask)
 629             {
 630                 gdk_gc_set_clip_mask( m_penGC, (GdkBitmap *) NULL );
 631                 gdk_gc_set_clip_origin( m_penGC, 0, 0 );
 632             }
 633
 634             SetLogicalFunction( old_logical_func );
 635             return TRUE;
 636         }
 637     }
 638
 639     gdk_window_copy_area ( m_window, m_penGC,
 640                            XLOG2DEV(xdest), YLOG2DEV(ydest),
 641                            csrc->GetWindow(),
 642                            source->DeviceToLogicalX(xsrc),
 643                            source->DeviceToLogicalY(ysrc),
 644                            source->DeviceToLogicalXRel(width),
 645                            source->DeviceToLogicalYRel(height) );
 646
 647     SetLogicalFunction( old_logical_func );
 648     return TRUE;
 649 }
 650
 651 void wxWindowDC::DrawText( const wxString &text, long x, long y, bool WXUNUSED(use16) )
 652 {
 653     wxCHECK_RET( Ok(), "invalid window dc" );
 654
 655     GdkFont *font = m_font.GetInternalFont( m_scaleY );
 656
 657     x = XLOG2DEV(x);
 658     y = YLOG2DEV(y);
 659
 660     // CMB 21/5/98: draw text background if mode is wxSOLID
 661     if (m_backgroundMode == wxSOLID)
 662     {
 663         long width = gdk_string_width( font, text );
 664         long height = font->ascent + font->descent;
 665         gdk_gc_set_foreground( m_textGC, m_textBackgroundColour.GetColor() );
 666         gdk_draw_rectangle( m_window, m_textGC, TRUE, x, y, width, height );
 667         gdk_gc_set_foreground( m_textGC, m_textForegroundColour.GetColor() );
 668     }
 669     gdk_draw_string( m_window, font, m_textGC, x, y + font->ascent, text );
 670
 671     // CMB 17/7/98: simple underline: ignores scaling and underlying
 672     // X font's XA_UNDERLINE_POSITION and XA_UNDERLINE_THICKNESS
 673     // properties (see wxXt implementation)
 674     if (m_font.GetUnderlined())
 675     {
 676         long width = gdk_string_width( font, text );
 677         long ul_y = y + font->ascent;
 678         if (font->descent > 0) ul_y++;
 679         gdk_draw_line( m_window, m_textGC, x, ul_y, x + width, ul_y);
 680     }
 681
 682     long w, h;
 683     GetTextExtent (text, &w, &h);
 684     CalcBoundingBox (x + w, y + h);
 685     CalcBoundingBox (x, y);
 686 }
 687
 688 bool wxWindowDC::CanGetTextExtent() const
 689 {
 690     return TRUE;
 691 }
 692
 693 void wxWindowDC::GetTextExtent( const wxString &string, long *width, long *height,
 694                      long *descent, long *externalLeading,
 695                      wxFont *theFont, bool WXUNUSED(use16) )
 696 {
 697     wxCHECK_RET( Ok(), "invalid window dc" );
 698
 699     wxFont fontToUse = m_font;
 700     if (theFont) fontToUse = *theFont;
 701
 702     GdkFont *font = fontToUse.GetInternalFont( m_scaleY );
 703     if (width) (*width) = long(gdk_string_width( font, string ) / m_scaleX);
 704     if (height) (*height) = long((font->ascent + font->descent) / m_scaleY);
 705     if (descent) (*descent) = long(font->descent / m_scaleY);
 706     if (externalLeading) (*externalLeading) = 0;  // ??
 707 }
 708
 709 long wxWindowDC::GetCharWidth()
 710 {
 711     wxCHECK_MSG( Ok(), 0, "invalid window dc" );
 712
 713     GdkFont *font = m_font.GetInternalFont( m_scaleY );
 714     return long(gdk_string_width( font, "H" ) / m_scaleX);
 715 }
 716
 717 long wxWindowDC::GetCharHeight()
 718 {
 719     wxCHECK_MSG( Ok(), 0, "invalid window dc" );
 720
 721     GdkFont *font = m_font.GetInternalFont( m_scaleY );
 722     return long((font->ascent + font->descent) / m_scaleY);
 723 }
 724
 725 void wxWindowDC::Clear()
 726 {
 727     wxCHECK_RET( Ok(), "invalid window dc" );
 728
 729     if (!m_isMemDC)
 730     {
 731         gdk_window_clear( m_window );
 732     }
 733     else
 734     {
 735         int width,height;
 736         GetSize( &width, &height );
 737         gdk_draw_rectangle( m_window, m_bgGC, TRUE, 0, 0, width, height );
 738     }
 739 }
 740
 741 void wxWindowDC::SetFont( const wxFont &font )
 742 {
 743     wxCHECK_RET( Ok(), "invalid window dc" );
 744
 745     m_font = font;
 746 }
 747
 748 void wxWindowDC::SetPen( const wxPen &pen )
 749 {
 750     wxCHECK_RET( Ok(), "invalid window dc" );
 751
 752     if (m_pen == pen) return;
 753
 754     m_pen = pen;
 755
 756     if (!m_pen.Ok()) return;
 757
 758     gint width = m_pen.GetWidth();
 759     // CMB: if width is non-zero scale it with the dc
 760     if (width <= 0)
 761     {
 762         width = 1;
 763     }
 764     else
 765     {
 766         // X doesn't allow different width in x and y and so we take
 767         // the average
 768         double w = 0.5 + (abs(XLOG2DEVREL(width)) + abs(YLOG2DEVREL(width))) / 2.0;
 769         width = (int)w;
 770     }
 771
 772     GdkLineStyle lineStyle = GDK_LINE_SOLID;
 773     switch (m_pen.GetStyle())
 774     {
 775         case wxSOLID:      { lineStyle = GDK_LINE_SOLID;       break; }
 776         case wxDOT:        { lineStyle = GDK_LINE_ON_OFF_DASH; break; }
 777         case wxLONG_DASH:  { lineStyle = GDK_LINE_ON_OFF_DASH; break; }
 778         case wxSHORT_DASH: { lineStyle = GDK_LINE_ON_OFF_DASH; break; }
 779         case wxDOT_DASH:   { lineStyle = GDK_LINE_DOUBLE_DASH; break; }
 780     }
 781
 782     GdkCapStyle capStyle = GDK_CAP_ROUND;
 783     switch (m_pen.GetCap())
 784     {
 785         case wxCAP_ROUND:      { capStyle = (width <= 1) ? GDK_CAP_NOT_LAST : GDK_CAP_ROUND; break; }
 786         case wxCAP_PROJECTING: { capStyle = GDK_CAP_PROJECTING; break; }
 787         case wxCAP_BUTT:       { capStyle = GDK_CAP_BUTT;       break; }
 788     }
 789
 790     GdkJoinStyle joinStyle = GDK_JOIN_ROUND;
 791     switch (m_pen.GetJoin())
 792     {
 793         case wxJOIN_BEVEL: { joinStyle = GDK_JOIN_BEVEL; break; }
 794         case wxJOIN_ROUND: { joinStyle = GDK_JOIN_ROUND; break; }
 795         case wxJOIN_MITER: { joinStyle = GDK_JOIN_MITER; break; }
 796     }
 797
 798     gdk_gc_set_line_attributes( m_penGC, width, lineStyle, capStyle, joinStyle );
 799
 800     m_pen.GetColour().CalcPixel( m_cmap );
 801     gdk_gc_set_foreground( m_penGC, m_pen.GetColour().GetColor() );
 802 }
 803
 804 void wxWindowDC::SetBrush( const wxBrush &brush )
 805 {
 806     wxCHECK_RET( Ok(), "invalid window dc" );
 807
 808     if (m_brush == brush) return;
 809
 810     m_brush = brush;
 811
 812     if (!m_brush.Ok()) return;
 813
 814     m_brush.GetColour().CalcPixel( m_cmap );
 815     gdk_gc_set_foreground( m_brushGC, m_brush.GetColour().GetColor() );
 816
 817     GdkFill fillStyle = GDK_SOLID;
 818     switch (m_brush.GetStyle())
 819     {
 820       case wxSOLID:
 821       case wxTRANSPARENT:
 822          break;
 823       default:
 824          fillStyle = GDK_STIPPLED;
 825     }
 826
 827     gdk_gc_set_fill( m_brushGC, fillStyle );
 828
 829     if (m_brush.GetStyle() == wxSTIPPLE)
 830     {
 831         gdk_gc_set_stipple( m_brushGC, m_brush.GetStipple()->GetPixmap() );
 832     }
 833
 834     if (IS_HATCH(m_brush.GetStyle()))
 835     {
 836         int num = m_brush.GetStyle() - wxBDIAGONAL_HATCH;
 837         gdk_gc_set_stipple( m_brushGC, hatches[num] );
 838     }
 839 }
 840
 841 void wxWindowDC::SetBackground( const wxBrush &brush )
 842 {
 843    // CMB 21/7/98: Added SetBackground. Sets background brush
 844    // for Clear() and bg colour for shapes filled with cross-hatch brush
 845
 846     wxCHECK_RET( Ok(), "invalid window dc" );
 847
 848     if (m_backgroundBrush == brush) return;
 849
 850     m_backgroundBrush = brush;
 851
 852     if (!m_backgroundBrush.Ok()) return;
 853
 854     m_backgroundBrush.GetColour().CalcPixel( m_cmap );
 855     gdk_gc_set_background( m_brushGC, m_backgroundBrush.GetColour().GetColor() );
 856     gdk_gc_set_background( m_penGC, m_backgroundBrush.GetColour().GetColor() );
 857     gdk_gc_set_background( m_bgGC, m_backgroundBrush.GetColour().GetColor() );
 858     gdk_gc_set_foreground( m_bgGC, m_backgroundBrush.GetColour().GetColor() );
 859
 860     GdkFill fillStyle = GDK_SOLID;
 861     switch (m_backgroundBrush.GetStyle())
 862     {
 863       case wxSOLID:
 864       case wxTRANSPARENT:
 865         break;
 866       default:
 867         fillStyle = GDK_STIPPLED;
 868     }
 869
 870     gdk_gc_set_fill( m_bgGC, fillStyle );
 871
 872     if (m_backgroundBrush.GetStyle() == wxSTIPPLE)
 873     {
 874         gdk_gc_set_stipple( m_bgGC, m_backgroundBrush.GetStipple()->GetPixmap() );
 875     }
 876
 877     if (IS_HATCH(m_backgroundBrush.GetStyle()))
 878     {
 879         int num = m_backgroundBrush.GetStyle() - wxBDIAGONAL_HATCH;
 880         gdk_gc_set_stipple( m_bgGC, hatches[num] );
 881      }
 882 }
 883
 884 void wxWindowDC::SetLogicalFunction( int function )
 885 {
 886     wxCHECK_RET( Ok(), "invalid window dc" );
 887
 888     if (m_logicalFunction == function) return;
 889
 890     GdkFunction mode = GDK_COPY;
 891     switch (function)
 892     {
 893         case wxXOR:    mode = GDK_INVERT; break;
 894         case wxINVERT: mode = GDK_INVERT; break;
 895         default:       break;
 896     }
 897
 898     m_logicalFunction = function;
 899     gdk_gc_set_function( m_penGC, mode );
 900     gdk_gc_set_function( m_brushGC, mode );
 901     gdk_gc_set_function( m_textGC, mode );
 902 }
 903
 904 void wxWindowDC::SetTextForeground( const wxColour &col )
 905 {
 906     wxCHECK_RET( Ok(), "invalid window dc" );
 907
 908     if (m_textForegroundColour == col) return;
 909
 910     m_textForegroundColour = col;
 911     if (!m_textForegroundColour.Ok()) return;
 912
 913     m_textForegroundColour.CalcPixel( m_cmap );
 914     gdk_gc_set_foreground( m_textGC, m_textForegroundColour.GetColor() );
 915 }
 916
 917 void wxWindowDC::SetTextBackground( const wxColour &col )
 918 {
 919     wxCHECK_RET( Ok(), "invalid window dc" );
 920
 921     if (m_textBackgroundColour == col) return;
 922
 923     m_textBackgroundColour = col;
 924     if (!m_textBackgroundColour.Ok()) return;
 925
 926     m_textBackgroundColour.CalcPixel( m_cmap );
 927     gdk_gc_set_background( m_textGC, m_textBackgroundColour.GetColor() );
 928 }
 929
 930 void wxWindowDC::SetBackgroundMode( int mode )
 931 {
 932     wxCHECK_RET( Ok(), "invalid window dc" );
 933
 934     m_backgroundMode = mode;
 935
 936     // CMB 21/7/98: fill style of cross-hatch brushes is affected by
 937     // transparent/solid background mode
 938
 939     if (m_brush.GetStyle() != wxSOLID && m_brush.GetStyle() != wxTRANSPARENT)
 940     {
 941         gdk_gc_set_fill( m_brushGC,
 942           (m_backgroundMode == wxTRANSPARENT) ? GDK_STIPPLED : GDK_OPAQUE_STIPPLED);
 943     }
 944 }
 945
 946 void wxWindowDC::SetPalette( const wxPalette& WXUNUSED(palette) )
 947 {
 948     wxFAIL_MSG( "wxWindowDC::SetPalette not implemented" );
 949 }
 950
 951 void wxWindowDC::SetClippingRegion( long x, long y, long width, long height )
 952 {
 953     wxCHECK_RET( Ok(), "invalid window dc" );
 954
 955     wxDC::SetClippingRegion( x, y, width, height );
 956
 957     GdkRectangle rect;
 958     rect.x = XLOG2DEV(x);
 959     rect.y = YLOG2DEV(y);
 960     rect.width = XLOG2DEVREL(width);
 961     rect.height = YLOG2DEVREL(height);
 962     gdk_gc_set_clip_rectangle( m_penGC, &rect );
 963     gdk_gc_set_clip_rectangle( m_brushGC, &rect );
 964     gdk_gc_set_clip_rectangle( m_textGC, &rect );
 965     gdk_gc_set_clip_rectangle( m_bgGC, &rect );
 966 }
 967
 968 void wxWindowDC::SetClippingRegion( const wxRegion &region  )
 969 {
 970     wxCHECK_RET( Ok(), "invalid window dc" );
 971
 972     if (region.Empty())
 973     {
 974         DestroyClippingRegion();
 975         return;
 976     }
 977
 978     gdk_gc_set_clip_region( m_penGC, region.GetRegion() );
 979     gdk_gc_set_clip_region( m_brushGC, region.GetRegion() );
 980     gdk_gc_set_clip_region( m_textGC, region.GetRegion() );
 981     gdk_gc_set_clip_region( m_bgGC, region.GetRegion() );
 982 }
 983
 984 void wxWindowDC::DestroyClippingRegion()
 985 {
 986     wxCHECK_RET( Ok(), "invalid window dc" );
 987
 988     wxDC::DestroyClippingRegion();
 989
 990     gdk_gc_set_clip_rectangle( m_penGC, (GdkRectangle *) NULL );
 991     gdk_gc_set_clip_rectangle( m_brushGC, (GdkRectangle *) NULL );
 992     gdk_gc_set_clip_rectangle( m_textGC, (GdkRectangle *) NULL );
 993     gdk_gc_set_clip_rectangle( m_bgGC, (GdkRectangle *) NULL );
 994 }
 995
 996 void wxWindowDC::SetUpDC()
 997 {
 998     Destroy();
 999     m_ok = TRUE;
1000     m_logicalFunction = wxCOPY;
1001     m_penGC = gdk_gc_new( m_window );
1002     m_brushGC = gdk_gc_new( m_window );
1003     m_textGC = gdk_gc_new( m_window );
1004     m_bgGC = gdk_gc_new( m_window );
1005
1006     wxColour tmp_col( m_textForegroundColour );
1007     m_textForegroundColour = wxNullColour;
1008     SetTextForeground( tmp_col );
1009     tmp_col = m_textBackgroundColour;
1010     m_textBackgroundColour = wxNullColour;
1011     SetTextBackground( tmp_col );
1012
1013     wxPen tmp_pen( m_pen );
1014     m_pen = wxNullPen;
1015     SetPen( tmp_pen );
1016
1017     wxFont tmp_font( m_font );
1018     m_font = wxNullFont;
1019     SetFont( tmp_font );
1020
1021     wxBrush tmp_brush( m_brush );
1022     m_brush = wxNullBrush;
1023     SetBrush( tmp_brush );
1024
1025     tmp_brush = m_backgroundBrush;
1026     m_backgroundBrush = wxNullBrush;
1027     SetBackground( tmp_brush );
1028
1029     if (!hatch_bitmap)
1030     {
1031         hatch_bitmap    = hatches;
1032         hatch_bitmap[0] = gdk_bitmap_create_from_data( (GdkWindow *) NULL, bdiag_bits, bdiag_width, bdiag_height );
1033         hatch_bitmap[1] = gdk_bitmap_create_from_data( (GdkWindow *) NULL, cdiag_bits, cdiag_width, cdiag_height );
1034         hatch_bitmap[2] = gdk_bitmap_create_from_data( (GdkWindow *) NULL, fdiag_bits, fdiag_width, fdiag_height );
1035         hatch_bitmap[3] = gdk_bitmap_create_from_data( (GdkWindow *) NULL, cross_bits, cross_width, cross_height );
1036         hatch_bitmap[4] = gdk_bitmap_create_from_data( (GdkWindow *) NULL, horiz_bits, horiz_width, horiz_height );
1037         hatch_bitmap[5] = gdk_bitmap_create_from_data( (GdkWindow *) NULL, verti_bits, verti_width, verti_height );
1038     }
1039 }
1040
1041 void wxWindowDC::Destroy()
1042 {
1043     if (m_penGC) gdk_gc_unref( m_penGC );
1044     m_penGC = (GdkGC*) NULL;
1045     if (m_brushGC) gdk_gc_unref( m_brushGC );
1046     m_brushGC = (GdkGC*) NULL;
1047     if (m_textGC) gdk_gc_unref( m_textGC );
1048     m_textGC = (GdkGC*) NULL;
1049     if (m_bgGC) gdk_gc_unref( m_bgGC );
1050     m_bgGC = (GdkGC*) NULL;
1051 }
1052
1053 GdkWindow *wxWindowDC::GetWindow()
1054 {
1055     return m_window;
1056 }
1057
1058 // ----------------------------------- spline code ----------------------------------------
1059
1060 void wx_quadratic_spline(double a1, double b1, double a2, double b2,
1061                          double a3, double b3, double a4, double b4);
1062 void wx_clear_stack();
1063 int wx_spline_pop(double *x1, double *y1, double *x2, double *y2, double *x3,
1064         double *y3, double *x4, double *y4);
1065 void wx_spline_push(double x1, double y1, double x2, double y2, double x3, double y3,
1066           double x4, double y4);
1067 static bool wx_spline_add_point(double x, double y);
1068 static void wx_spline_draw_point_array(wxDC *dc);
1069
1070 wxList wx_spline_point_list;
1071
1072 #define         half(z1, z2)    ((z1+z2)/2.0)
1073 #define         THRESHOLD       5
1074
1075 /* iterative version */
1076
1077 void wx_quadratic_spline(double a1, double b1, double a2, double b2, double a3, double b3, double a4,
1078                  double b4)
1079 {
1080     register double  xmid, ymid;
1081     double           x1, y1, x2, y2, x3, y3, x4, y4;
1082
1083     wx_clear_stack();
1084     wx_spline_push(a1, b1, a2, b2, a3, b3, a4, b4);
1085
1086     while (wx_spline_pop(&x1, &y1, &x2, &y2, &x3, &y3, &x4, &y4)) {
1087         xmid = (double)half(x2, x3);
1088         ymid = (double)half(y2, y3);
1089         if (fabs(x1 - xmid) < THRESHOLD && fabs(y1 - ymid) < THRESHOLD &&
1090             fabs(xmid - x4) < THRESHOLD && fabs(ymid - y4) < THRESHOLD) {
1091             wx_spline_add_point( x1, y1 );
1092             wx_spline_add_point( xmid, ymid );
1093         } else {
1094             wx_spline_push(xmid, ymid, (double)half(xmid, x3), (double)half(ymid, y3),
1095                  (double)half(x3, x4), (double)half(y3, y4), x4, y4);
1096             wx_spline_push(x1, y1, (double)half(x1, x2), (double)half(y1, y2),
1097                  (double)half(x2, xmid), (double)half(y2, ymid), xmid, ymid);
1098         }
1099     }
1100 }
1101
1102 /* utilities used by spline drawing routines */
1103
1104 typedef struct wx_spline_stack_struct {
1105     double           x1, y1, x2, y2, x3, y3, x4, y4;
1106 } Stack;
1107
1108 #define         SPLINE_STACK_DEPTH             20
1109 static Stack    wx_spline_stack[SPLINE_STACK_DEPTH];
1110 static Stack   *wx_stack_top;
1111 static int      wx_stack_count;
1112
1113 void wx_clear_stack()
1114 {
1115     wx_stack_top = wx_spline_stack;
1116     wx_stack_count = 0;
1117 }
1118
1119 void wx_spline_push(double x1, double y1, double x2, double y2, double x3, double y3, double x4, double y4)
1120 {
1121     wx_stack_top->x1 = x1;
1122     wx_stack_top->y1 = y1;
1123     wx_stack_top->x2 = x2;
1124     wx_stack_top->y2 = y2;
1125     wx_stack_top->x3 = x3;
1126     wx_stack_top->y3 = y3;
1127     wx_stack_top->x4 = x4;
1128     wx_stack_top->y4 = y4;
1129     wx_stack_top++;
1130     wx_stack_count++;
1131 }
1132
1133 int wx_spline_pop(double *x1, double *y1, double *x2, double *y2,
1134                   double *x3, double *y3, double *x4, double *y4)
1135 {
1136     if (wx_stack_count == 0)
1137         return (0);
1138     wx_stack_top--;
1139     wx_stack_count--;
1140     *x1 = wx_stack_top->x1;
1141     *y1 = wx_stack_top->y1;
1142     *x2 = wx_stack_top->x2;
1143     *y2 = wx_stack_top->y2;
1144     *x3 = wx_stack_top->x3;
1145     *y3 = wx_stack_top->y3;
1146     *x4 = wx_stack_top->x4;
1147     *y4 = wx_stack_top->y4;
1148     return (1);
1149 }
1150
1151 static bool wx_spline_add_point(double x, double y)
1152 {
1153   wxPoint *point = new wxPoint ;
1154   point->x = (int) x;
1155   point->y = (int) y;
1156   wx_spline_point_list.Append((wxObject*)point);
1157   return TRUE;
1158 }
1159
1160 static void wx_spline_draw_point_array(wxDC *dc)
1161 {
1162   dc->DrawLines(&wx_spline_point_list, 0, 0 );
1163   wxNode *node = wx_spline_point_list.First();
1164   while (node)
1165   {
1166     wxPoint *point = (wxPoint *)node->Data();
1167     delete point;
1168     delete node;
1169     node = wx_spline_point_list.First();
1170   }
1171 }
1172
1173 void wxWindowDC::DrawSpline( wxList *points )
1174 {
1175     wxCHECK_RET( Ok(), "invalid window dc" );
1176
1177     wxPoint *p;
1178     double           cx1, cy1, cx2, cy2, cx3, cy3, cx4, cy4;
1179     double           x1, y1, x2, y2;
1180
1181     wxNode *node = points->First();
1182     p = (wxPoint *)node->Data();
1183
1184     x1 = p->x;
1185     y1 = p->y;
1186
1187     node = node->Next();
1188     p = (wxPoint *)node->Data();
1189
1190     x2 = p->x;
1191     y2 = p->y;
1192     cx1 = (double)((x1 + x2) / 2);
1193     cy1 = (double)((y1 + y2) / 2);
1194     cx2 = (double)((cx1 + x2) / 2);
1195     cy2 = (double)((cy1 + y2) / 2);
1196
1197     wx_spline_add_point(x1, y1);
1198
1199     while ((node = node->Next()) != NULL)
1200     {
1201         p = (wxPoint *)node->Data();
1202         x1 = x2;
1203         y1 = y2;
1204         x2 = p->x;
1205         y2 = p->y;
1206         cx4 = (double)(x1 + x2) / 2;
1207         cy4 = (double)(y1 + y2) / 2;
1208         cx3 = (double)(x1 + cx4) / 2;
1209         cy3 = (double)(y1 + cy4) / 2;
1210
1211         wx_quadratic_spline(cx1, cy1, cx2, cy2, cx3, cy3, cx4, cy4);
1212
1213         cx1 = cx4;
1214         cy1 = cy4;
1215         cx2 = (double)(cx1 + x2) / 2;
1216         cy2 = (double)(cy1 + y2) / 2;
1217     }
1218
1219     wx_spline_add_point( cx1, cy1 );
1220     wx_spline_add_point( x2, y2 );
1221
1222     wx_spline_draw_point_array( this );
1223 }
1224
1225
1226 //-----------------------------------------------------------------------------
1227 // wxPaintDC
1228 //-----------------------------------------------------------------------------
1229
1230 IMPLEMENT_DYNAMIC_CLASS(wxPaintDC,wxWindowDC)
1231
1232 wxPaintDC::wxPaintDC()
1233   : wxWindowDC()
1234 {
1235 }
1236
1237 wxPaintDC::wxPaintDC( wxWindow *win )
1238   : wxWindowDC( win )
1239 {
1240 }
1241
1242 //-----------------------------------------------------------------------------
1243 // wxClientDC
1244 //-----------------------------------------------------------------------------
1245
1246 IMPLEMENT_DYNAMIC_CLASS(wxClientDC,wxWindowDC)
1247
1248 wxClientDC::wxClientDC()
1249   : wxWindowDC()
1250 {
1251 }
1252
1253 wxClientDC::wxClientDC( wxWindow *win )
1254   : wxWindowDC( win )
1255 {
1256 }
1257