src/gtk/dcclient.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        dcclient.cpp
   3 // Purpose:
   4 // Author:      Robert Roebling
   5 // Created:     01/02/97
   6 // RCS-ID:      $Id$
   7 // Copyright:   (c) 1998 Robert Roebling, Julian Smart and Markus Holzem
   8 // Licence:     wxWindows licence
   9 /////////////////////////////////////////////////////////////////////////////
  10
  11 #ifdef __GNUG__
  12 #pragma implementation "dcclient.h"
  13 #endif
  14
  15 #include "wx/dcclient.h"
  16 #include "wx/dcmemory.h"
  17
  18 //-----------------------------------------------------------------------------
  19 // local data
  20 //-----------------------------------------------------------------------------
  21
  22 #include "bdiag.xbm"
  23 #include "fdiag.xbm"
  24 #include "cdiag.xbm"
  25 #include "horiz.xbm"
  26 #include "verti.xbm"
  27 #include "cross.xbm"
  28 #define  num_hatches 6
  29
  30 static GdkPixmap  *hatches[num_hatches];
  31 static GdkPixmap **hatch_bitmap = NULL;
  32
  33 //-----------------------------------------------------------------------------
  34 // constants
  35 //-----------------------------------------------------------------------------
  36
  37 #define RAD2DEG 57.2957795131
  38
  39 //-----------------------------------------------------------------------------
  40 // temporary implementation of the missing GDK function
  41 //-----------------------------------------------------------------------------
  42 #include "gdk/gdkprivate.h"
  43 void gdk_draw_bitmap     (GdkDrawable  *drawable,
  44                           GdkGC        *gc,
  45                           GdkDrawable  *src,
  46                           gint          xsrc,
  47                           gint          ysrc,
  48                           gint          xdest,
  49                           gint          ydest,
  50                           gint          width,
  51                           gint          height)
  52 {
  53   GdkWindowPrivate *drawable_private;
  54   GdkWindowPrivate *src_private;
  55   GdkGCPrivate *gc_private;
  56
  57   g_return_if_fail (drawable != NULL);
  58   g_return_if_fail (src != NULL);
  59   g_return_if_fail (gc != NULL);
  60
  61   drawable_private = (GdkWindowPrivate*) drawable;
  62   src_private = (GdkWindowPrivate*) src;
  63   if (drawable_private->destroyed || src_private->destroyed)
  64     return;
  65   gc_private = (GdkGCPrivate*) gc;
  66
  67   if (width == -1)
  68     width = src_private->width;
  69   if (height == -1)
  70     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 // wxPaintDC
  84 //-----------------------------------------------------------------------------
  85
  86 IMPLEMENT_DYNAMIC_CLASS(wxPaintDC,wxDC)
  87
  88 wxPaintDC::wxPaintDC(void)
  89 {
  90 };
  91
  92 wxPaintDC::wxPaintDC( wxWindow *window )
  93 {
  94   if (!window) return;
  95   GtkWidget *widget = window->m_wxwindow;
  96   if (!widget) return;
  97   m_window = widget->window;
  98   if (!m_window) return;
  99   if (window->m_wxwindow)
 100     m_cmap = gtk_widget_get_colormap( window->m_wxwindow );
 101   else
 102     m_cmap = gtk_widget_get_colormap( window->m_widget );
 103
 104   m_isDrawable = TRUE;
 105
 106   SetUpDC();
 107
 108   long x = 0;
 109   long y = 0;
 110   window->GetDrawingOffset( &x, &y );
 111   SetInternalDeviceOrigin( -x, -y );
 112 };
 113
 114 wxPaintDC::~wxPaintDC(void)
 115 {
 116 };
 117
 118 void wxPaintDC::FloodFill( long WXUNUSED(x1), long WXUNUSED(y1),
 119   wxColour *WXUNUSED(col), int WXUNUSED(style) )
 120 {
 121 };
 122
 123 bool wxPaintDC::GetPixel( long WXUNUSED(x1), long WXUNUSED(y1), wxColour *WXUNUSED(col) ) const
 124 {
 125   return FALSE;
 126 };
 127
 128 void wxPaintDC::DrawLine( long x1, long y1, long x2, long y2 )
 129 {
 130   if (!Ok()) return;
 131
 132   if (m_pen.GetStyle() != wxTRANSPARENT)
 133   {
 134     gdk_draw_line( m_window, m_penGC,
 135       XLOG2DEV(x1), YLOG2DEV(y1), XLOG2DEV(x2), YLOG2DEV(y2) );
 136   };
 137 };
 138
 139 void wxPaintDC::CrossHair( long x, long y )
 140 {
 141   if (!Ok()) return;
 142
 143   if (m_pen.GetStyle() != wxTRANSPARENT)
 144   {
 145     int w = 0;
 146     int h = 0;
 147     GetSize( &w, &h );
 148     long xx = XLOG2DEV(x);
 149     long yy = YLOG2DEV(y);
 150     gdk_draw_line( m_window, m_penGC,
 151       0, yy, XLOG2DEVREL(w), yy );
 152     gdk_draw_line( m_window, m_penGC,
 153       xx, 0, xx, YLOG2DEVREL(h) );
 154   };
 155 };
 156
 157 void wxPaintDC::DrawArc( long x1, long y1, long x2, long y2, double xc, double yc )
 158 {
 159   if (!Ok()) return;
 160
 161   long xx1 = XLOG2DEV(x1);
 162   long yy1 = YLOG2DEV(y1);
 163   long xx2 = XLOG2DEV(x2);
 164   long yy2 = YLOG2DEV(y2);
 165   long xxc = XLOG2DEV((long)xc);
 166   long yyc = YLOG2DEV((long)yc);
 167   double dx = xx1 - xxc;
 168   double dy = yy1 - yyc;
 169   double radius = sqrt(dx*dx+dy*dy);
 170   long   r      = (long)radius;
 171   double radius1, radius2;
 172
 173   if (xx1 == xx2 && yy1 == yy2)
 174   {
 175     radius1 = 0.0;
 176     radius2 = 360.0;
 177   }
 178   else
 179   if (radius == 0.0)
 180   {
 181     radius1 = radius2 = 0.0;
 182   }
 183   else
 184   {
 185     radius1 = (xx1 - xxc == 0) ?
 186             (yy1 - yyc < 0) ? 90.0 : -90.0 :
 187             -atan2(double(yy1-yyc), double(xx1-xxc)) * RAD2DEG;
 188     radius2 = (xx2 - xxc == 0) ?
 189             (yy2 - yyc < 0) ? 90.0 : -90.0 :
 190             -atan2(double(yy2-yyc), double(xx2-xxc)) * RAD2DEG;
 191   };
 192   long alpha1 = long(radius1 * 64.0);
 193   long alpha2 = long((radius2 - radius1) * 64.0);
 194   while (alpha2 <= 0) alpha2 += 360*64;
 195   while (alpha1 > 360*64) alpha1 -= 360*64;
 196
 197   if (m_brush.GetStyle() != wxTRANSPARENT)
 198     gdk_draw_arc( m_window, m_brushGC, TRUE, xxc-r, yyc-r, 2*r,2*r, alpha1, alpha2 );
 199
 200   if (m_pen.GetStyle() != wxTRANSPARENT)
 201     gdk_draw_arc( m_window, m_penGC, FALSE, xxc-r, yyc-r, 2*r,2*r, alpha1, alpha2 );
 202
 203 };
 204
 205 void wxPaintDC::DrawEllipticArc( long x, long y, long width, long height, double sa, double ea )
 206 {
 207   if (!Ok()) return;
 208
 209   long xx = XLOG2DEV(x);
 210   long yy = YLOG2DEV(y);
 211   long ww = m_signX * XLOG2DEVREL(width);
 212   long hh = m_signY * YLOG2DEVREL(height);
 213
 214   // CMB: handle -ve width and/or height
 215   if (ww < 0) { ww = -ww; xx = xx - ww; }
 216   if (hh < 0) { hh = -hh; yy = yy - hh; }
 217
 218   long start = long(sa * 64.0);
 219   long end = long(ea * 64.0);
 220   if (m_brush.GetStyle() != wxTRANSPARENT)
 221     gdk_draw_arc( m_window, m_brushGC, TRUE, xx, yy, ww, hh, start, end );
 222
 223   if (m_pen.GetStyle() != wxTRANSPARENT)
 224     gdk_draw_arc( m_window, m_penGC, FALSE, xx, yy, ww, hh, start, end );
 225 };
 226
 227 void wxPaintDC::DrawPoint( long x, long y )
 228 {
 229   if (!Ok()) return;
 230
 231   if (m_pen.GetStyle() != wxTRANSPARENT)
 232     gdk_draw_point( m_window, m_penGC, XLOG2DEV(x), YLOG2DEV(y) );
 233 };
 234
 235 void wxPaintDC::DrawLines( int n, wxPoint points[], long xoffset, long yoffset )
 236 {
 237   if (!Ok()) return;
 238
 239   if (m_pen.GetStyle() == wxTRANSPARENT) return;
 240
 241   for (int i = 0; i < n-1; i++)
 242   {
 243     long x1 = XLOG2DEV(points[i].x + xoffset);
 244     long x2 = XLOG2DEV(points[i+1].x + xoffset);
 245     long y1 = YLOG2DEV(points[i].y + yoffset);     // oh, what a waste
 246     long y2 = YLOG2DEV(points[i+1].y + yoffset);
 247     gdk_draw_line( m_window, m_penGC, x1, y1, x2, y2 );
 248   };
 249 };
 250
 251 void wxPaintDC::DrawLines( wxList *points, long xoffset, long yoffset )
 252 {
 253   if (!Ok()) return;
 254
 255   if (m_pen.GetStyle() == wxTRANSPARENT) return;
 256
 257   wxNode *node = points->First();
 258   while (node->Next())
 259   {
 260     wxPoint *point = (wxPoint*)node->Data();
 261     wxPoint *npoint = (wxPoint*)node->Next()->Data();
 262     long x1 = XLOG2DEV(point->x + xoffset);
 263     long x2 = XLOG2DEV(npoint->x + xoffset);
 264     long y1 = YLOG2DEV(point->y + yoffset);    // and again...
 265     long y2 = YLOG2DEV(npoint->y + yoffset);
 266     gdk_draw_line( m_window, m_penGC, x1, y1, x2, y2 );
 267     node = node->Next();
 268   };
 269 };
 270
 271 void wxPaintDC::DrawPolygon( int WXUNUSED(n), wxPoint WXUNUSED(points)[],
 272   long WXUNUSED(xoffset), long WXUNUSED(yoffset), int WXUNUSED(fillStyle) )
 273 {
 274   if (!Ok()) return;
 275 };
 276
 277 void wxPaintDC::DrawPolygon( wxList *WXUNUSED(lines), long WXUNUSED(xoffset),
 278                              long WXUNUSED(yoffset), int WXUNUSED(fillStyle) )
 279 {
 280   if (!Ok()) return;
 281 };
 282
 283 void wxPaintDC::DrawRectangle( long x, long y, long width, long height )
 284 {
 285   if (!Ok()) return;
 286
 287   long xx = XLOG2DEV(x);
 288   long yy = YLOG2DEV(y);
 289   long ww = m_signX * XLOG2DEVREL(width);
 290   long hh = m_signY * YLOG2DEVREL(height);
 291
 292   // CMB: draw nothing if transformed w or h is 0
 293   if (ww == 0 || hh == 0) return;
 294
 295   // CMB: handle -ve width and/or height
 296   if (ww < 0) { ww = -ww; xx = xx - ww; }
 297   if (hh < 0) { hh = -hh; yy = yy - hh; }
 298
 299   if (m_brush.GetStyle() != wxTRANSPARENT)
 300     gdk_draw_rectangle( m_window, m_brushGC, TRUE, xx, yy, ww, hh );
 301
 302   if (m_pen.GetStyle() != wxTRANSPARENT)
 303     gdk_draw_rectangle( m_window, m_penGC, FALSE, xx, yy, ww-1, hh-1 );
 304 };
 305
 306 void wxPaintDC::DrawRoundedRectangle( long x, long y, long width, long height, double radius )
 307 {
 308   if (!Ok()) return;
 309
 310   if (radius < 0.0) radius = - radius * ((width < height) ? width : height);
 311
 312   long xx = XLOG2DEV(x);
 313   long yy = YLOG2DEV(y);
 314   long ww = m_signX * XLOG2DEVREL(width);
 315   long hh = m_signY * YLOG2DEVREL(height);
 316   long rr = XLOG2DEVREL((long)radius);
 317
 318   // CMB: handle -ve width and/or height
 319   if (ww < 0) { ww = -ww; xx = xx - ww; }
 320   if (hh < 0) { hh = -hh; yy = yy - hh; }
 321
 322   // CMB: if radius is zero use DrawRectangle() instead to avoid
 323   // X drawing errors with small radii
 324   if (rr == 0)
 325   {
 326     DrawRectangle( x, y, width, height );
 327     return;
 328   }
 329
 330   // CMB: draw nothing if transformed w or h is 0
 331   if (ww == 0 || hh == 0) return;
 332
 333   // CMB: adjust size if outline is drawn otherwise the result is
 334   // 1 pixel too wide and high
 335   if (m_pen.GetStyle() != wxTRANSPARENT)
 336   {
 337     ww--;
 338     hh--;
 339   }
 340
 341   // CMB: ensure dd is not larger than rectangle otherwise we
 342   // get an hour glass shape
 343   long dd = 2 * rr;
 344   if (dd > ww) dd = ww;
 345   if (dd > hh) dd = hh;
 346   rr = dd / 2;
 347
 348   if (m_brush.GetStyle() != wxTRANSPARENT)
 349   {
 350     gdk_draw_rectangle( m_window, m_brushGC, TRUE, xx+rr, yy, ww-dd+1, hh );
 351     gdk_draw_rectangle( m_window, m_brushGC, TRUE, xx, yy+rr, ww, hh-dd+1 );
 352     gdk_draw_arc( m_window, m_brushGC, TRUE, xx, yy, dd, dd, 90*64, 90*64 );
 353     gdk_draw_arc( m_window, m_brushGC, TRUE, xx+ww-dd, yy, dd, dd, 0, 90*64 );
 354     gdk_draw_arc( m_window, m_brushGC, TRUE, xx+ww-dd, yy+hh-dd, dd, dd, 270*64, 90*64 );
 355     gdk_draw_arc( m_window, m_brushGC, TRUE, xx, yy+hh-dd, dd, dd, 180*64, 90*64 );
 356   };
 357
 358   if (m_pen.GetStyle() != wxTRANSPARENT)
 359   {
 360     gdk_draw_line( m_window, m_penGC, xx+rr, yy, xx+ww-rr, yy );
 361     gdk_draw_line( m_window, m_penGC, xx+rr, yy+hh, xx+ww-rr, yy+hh );
 362     gdk_draw_line( m_window, m_penGC, xx, yy+rr, xx, yy+hh-rr );
 363     gdk_draw_line( m_window, m_penGC, xx+ww, yy+rr, xx+ww, yy+hh-rr );
 364     gdk_draw_arc( m_window, m_penGC, FALSE, xx, yy, dd, dd, 90*64, 90*64 );
 365     gdk_draw_arc( m_window, m_penGC, FALSE, xx+ww-dd, yy, dd, dd, 0, 90*64 );
 366     gdk_draw_arc( m_window, m_penGC, FALSE, xx+ww-dd, yy+hh-dd, dd, dd, 270*64, 90*64 );
 367     gdk_draw_arc( m_window, m_penGC, FALSE, xx, yy+hh-dd, dd, dd, 180*64, 90*64 );
 368   };
 369 };
 370
 371 void wxPaintDC::DrawEllipse( long x, long y, long width, long height )
 372 {
 373   if (!Ok()) return;
 374
 375   long xx = XLOG2DEV(x);
 376   long yy = YLOG2DEV(y);
 377   long ww = m_signX * XLOG2DEVREL(width);
 378   long hh = m_signY * YLOG2DEVREL(height);
 379
 380   // CMB: handle -ve width and/or height
 381   if (ww < 0) { ww = -ww; xx = xx - ww; }
 382   if (hh < 0) { hh = -hh; yy = yy - hh; }
 383
 384   if (m_brush.GetStyle() != wxTRANSPARENT)
 385     gdk_draw_arc( m_window, m_brushGC, TRUE, xx, yy, ww, hh, 0, 360*64 );
 386
 387   if (m_pen.GetStyle() != wxTRANSPARENT)
 388     gdk_draw_arc( m_window, m_penGC, FALSE, xx, yy, ww, hh, 0, 360*64 );
 389 };
 390
 391 bool wxPaintDC::CanDrawBitmap(void) const
 392 {
 393   return TRUE;
 394 };
 395
 396 void wxPaintDC::DrawIcon( const wxIcon &icon, long x, long y, bool useMask )
 397 {
 398   if (!Ok()) return;
 399
 400   if (!icon.Ok()) return;
 401
 402   int xx = XLOG2DEV(x);
 403   int yy = YLOG2DEV(y);
 404
 405   GdkBitmap *mask = NULL;
 406   if (icon.GetMask()) mask = icon.GetMask()->GetBitmap();
 407
 408   if (useMask && mask)
 409   {
 410     gdk_gc_set_clip_mask( m_penGC, mask );
 411     gdk_gc_set_clip_origin( m_penGC, xx, yy );
 412   };
 413
 414   GdkPixmap *pm = icon.GetPixmap();
 415   gdk_draw_pixmap( m_window, m_penGC, pm, 0, 0, xx, yy, -1, -1 );
 416
 417   if (useMask && mask)
 418   {
 419     gdk_gc_set_clip_mask( m_penGC, NULL );
 420     gdk_gc_set_clip_origin( m_penGC, 0, 0 );
 421   };
 422 };
 423
 424 bool wxPaintDC::Blit( long xdest, long ydest, long width, long height,
 425        wxDC *source, long xsrc, long ysrc, int WXUNUSED(logical_func), bool WXUNUSED(useMask) )
 426 {
 427   if (!Ok()) return FALSE;
 428
 429   // CMB 20/5/98: add blitting of bitmaps
 430   if (source->IsKindOf(CLASSINFO(wxMemoryDC)))
 431   {
 432     wxMemoryDC* srcDC = (wxMemoryDC*)source;
 433         GdkBitmap* bmap = srcDC->m_selected.GetBitmap();
 434     if (bmap)
 435     {
 436       gdk_draw_bitmap (
 437           m_window,
 438           m_textGC,
 439           bmap,
 440           source->DeviceToLogicalX(xsrc), source->DeviceToLogicalY(ysrc),
 441           XLOG2DEV(xdest), YLOG2DEV(ydest),
 442           source->DeviceToLogicalXRel(width), source->DeviceToLogicalYRel(height)
 443           );
 444       return TRUE;
 445     }
 446   }
 447
 448   wxClientDC *csrc = (wxClientDC*)source;
 449   gdk_window_copy_area ( m_window, m_penGC,
 450     XLOG2DEV(xdest), YLOG2DEV(ydest),
 451     csrc->GetWindow(),
 452     source->DeviceToLogicalX(xsrc), source->DeviceToLogicalY(ysrc),
 453     source->DeviceToLogicalXRel(width), source->DeviceToLogicalYRel(height) );
 454
 455 /*
 456   gdk_window_copy_area ( m_window, m_penGC,
 457     XLOG2DEV(xdest), YLOG2DEV(ydest),
 458     csrc->GetWindow(),
 459     xsrc, ysrc,
 460     width, height );
 461 */
 462
 463   return TRUE;
 464 };
 465
 466 void wxPaintDC::DrawText( const wxString &text, long x, long y, bool
 467 WXUNUSED(use16) )
 468 {
 469   if (!Ok()) return;
 470
 471   GdkFont *font = m_font.GetInternalFont( m_scaleY );
 472
 473   x = XLOG2DEV(x);
 474   y = YLOG2DEV(y);
 475
 476   // CMB 21/5/98: draw text background if mode is wxSOLID
 477   if (m_backgroundMode == wxSOLID)
 478   {
 479     long width = gdk_string_width( font, text );
 480     long height = font->ascent + font->descent;
 481     gdk_gc_set_foreground( m_textGC, m_textBackgroundColour.GetColor() );
 482     gdk_draw_rectangle( m_window, m_textGC, TRUE, x, y, width, height );
 483     gdk_gc_set_foreground( m_textGC, m_textForegroundColour.GetColor() );
 484   }
 485   gdk_draw_string( m_window, font, m_textGC, x, y + font->ascent, text );
 486
 487   // CMB 17/7/98: simple underline: ignores scaling and underlying
 488   // X font's XA_UNDERLINE_POSITION and XA_UNDERLINE_THICKNESS
 489   // properties (see wxXt implementation)
 490   if (m_font.GetUnderlined())
 491   {
 492     long width = gdk_string_width( font, text );
 493     long ul_y = y + font->ascent;
 494     if (font->descent > 0) ul_y++;
 495     gdk_draw_line( m_window, m_textGC, x, ul_y, x + width, ul_y);
 496   }
 497 };
 498
 499
 500
 501 bool wxPaintDC::CanGetTextExtent(void) const
 502 {
 503   return TRUE;
 504 };
 505
 506 void wxPaintDC::GetTextExtent( const wxString &string, long *width, long *height,
 507                      long *WXUNUSED(descent), long *WXUNUSED(externalLeading),
 508                      wxFont *WXUNUSED(theFont), bool WXUNUSED(use16) )
 509 {
 510   if (!Ok()) return;
 511
 512   GdkFont *font = m_font.GetInternalFont( m_scaleY );
 513   if (width) (*width) = long(gdk_string_width( font, string ) / m_scaleX);
 514   if (height) (*height) = long((font->ascent + font->descent) / m_scaleY);
 515 };
 516
 517 long wxPaintDC::GetCharWidth(void)
 518 {
 519   if (!Ok()) return 0;
 520
 521   GdkFont *font = m_font.GetInternalFont( m_scaleY );
 522   return gdk_string_width( font, "H" );
 523 };
 524
 525 long wxPaintDC::GetCharHeight(void)
 526 {
 527   if (!Ok()) return 0;
 528
 529   GdkFont *font = m_font.GetInternalFont( m_scaleY );
 530   return font->ascent + font->descent;
 531 };
 532
 533 void wxPaintDC::Clear(void)
 534 {
 535   if (!Ok()) return;
 536
 537   DestroyClippingRegion();
 538
 539   if (m_isDrawable)
 540   {
 541     gdk_window_clear( m_window );
 542   }
 543   else
 544   {
 545     int width = 0;
 546     int height = 0;
 547     GetSize( &width, &height );
 548     gdk_draw_rectangle( m_window, m_brushGC, TRUE, 0, 0, width, height );
 549   };
 550 };
 551
 552 void wxPaintDC::SetFont( const wxFont &font )
 553 {
 554   if (!Ok()) return;
 555
 556   m_font = font;
 557 };
 558
 559 void wxPaintDC::SetPen( const wxPen &pen )
 560 {
 561   if (!Ok()) return;
 562
 563   if (m_pen == pen) return;
 564
 565   m_pen = pen;
 566
 567   if (!m_pen.Ok()) return;
 568
 569   gint width = m_pen.GetWidth();
 570   // CMB: if width is non-zero scale it with the dc
 571   if (width <= 0)
 572   {
 573     width = 1;
 574   }
 575   else
 576   {
 577     // X doesn't allow different width in x and y and so we take
 578     // the average
 579     double w = 0.5 + (abs(XLOG2DEVREL(width)) + abs(YLOG2DEVREL(width))) / 2.0;
 580     width = (int)w;
 581   }
 582
 583   GdkLineStyle lineStyle = GDK_LINE_SOLID;
 584   switch (m_pen.GetStyle())
 585   {
 586     case wxSOLID:      { lineStyle = GDK_LINE_SOLID;       break; };
 587     case wxDOT:        { lineStyle = GDK_LINE_ON_OFF_DASH; break; };
 588     case wxLONG_DASH:  { lineStyle = GDK_LINE_ON_OFF_DASH; break; };
 589     case wxSHORT_DASH: { lineStyle = GDK_LINE_ON_OFF_DASH; break; };
 590     case wxDOT_DASH:   { lineStyle = GDK_LINE_DOUBLE_DASH; break; };
 591   };
 592
 593   GdkCapStyle capStyle = GDK_CAP_ROUND;
 594   switch (m_pen.GetCap())
 595   {
 596     case wxCAP_ROUND:      { capStyle = (width <= 1) ? GDK_CAP_NOT_LAST : GDK_CAP_ROUND; break; };
 597     case wxCAP_PROJECTING: { capStyle = GDK_CAP_PROJECTING; break; };
 598     case wxCAP_BUTT:       { capStyle = GDK_CAP_BUTT;       break; };
 599   };
 600
 601   GdkJoinStyle joinStyle = GDK_JOIN_ROUND;
 602   switch (m_pen.GetJoin())
 603   {
 604     case wxJOIN_BEVEL: { joinStyle = GDK_JOIN_BEVEL; break; };
 605     case wxJOIN_ROUND: { joinStyle = GDK_JOIN_ROUND; break; };
 606     case wxJOIN_MITER: { joinStyle = GDK_JOIN_MITER; break; };
 607   };
 608
 609   gdk_gc_set_line_attributes( m_penGC, width, lineStyle, capStyle, joinStyle );
 610
 611   m_pen.GetColour().CalcPixel( m_cmap );
 612   gdk_gc_set_foreground( m_penGC, m_pen.GetColour().GetColor() );
 613 };
 614
 615 void wxPaintDC::SetBrush( const wxBrush &brush )
 616 {
 617   if (!Ok()) return;
 618
 619   if (m_brush == brush) return;
 620
 621   m_brush = brush;
 622
 623   if (!m_brush.Ok()) return;
 624
 625   m_brush.GetColour().CalcPixel( m_cmap );
 626   gdk_gc_set_foreground( m_brushGC, m_brush.GetColour().GetColor() );
 627
 628   GdkFill fillStyle = GDK_SOLID;
 629   switch (m_brush.GetStyle())
 630   {
 631     case wxSOLID:
 632     case wxTRANSPARENT:
 633       break;
 634     default:
 635       fillStyle = GDK_STIPPLED;
 636   };
 637
 638   gdk_gc_set_fill( m_brushGC, fillStyle );
 639
 640   if (m_brush.GetStyle() == wxSTIPPLE)
 641   {
 642     gdk_gc_set_stipple( m_brushGC, m_brush.GetStipple()->GetPixmap() );
 643   };
 644
 645   if (IS_HATCH(m_brush.GetStyle()))
 646   {
 647     int num = m_brush.GetStyle() - wxBDIAGONAL_HATCH;
 648     gdk_gc_set_stipple( m_brushGC, hatches[num] );
 649   };
 650 };
 651
 652 void wxPaintDC::SetLogicalFunction( int function )
 653 {
 654   if (m_logicalFunction == function) return;
 655   GdkFunction mode = GDK_COPY;
 656   switch (function)
 657   {
 658     case wxXOR:    mode = GDK_INVERT; break;
 659     case wxINVERT: mode = GDK_INVERT; break;
 660     default:       break;
 661   };
 662   m_logicalFunction = function;
 663   gdk_gc_set_function( m_penGC, mode );
 664   gdk_gc_set_function( m_brushGC, mode );
 665 };
 666
 667 void wxPaintDC::SetTextForeground( const wxColour &col )
 668 {
 669   if (!Ok()) return;
 670
 671   if (m_textForegroundColour == col) return;
 672
 673   m_textForegroundColour = col;
 674   if (!m_textForegroundColour.Ok()) return;
 675
 676   m_textForegroundColour.CalcPixel( m_cmap );
 677   gdk_gc_set_foreground( m_textGC, m_textForegroundColour.GetColor() );
 678 };
 679
 680 void wxPaintDC::SetTextBackground( const wxColour &col )
 681 {
 682   if (!Ok()) return;
 683
 684   if (m_textBackgroundColour == col) return;
 685
 686   m_textBackgroundColour = col;
 687   if (!m_textBackgroundColour.Ok()) return;
 688
 689   m_textBackgroundColour.CalcPixel( m_cmap );
 690   gdk_gc_set_background( m_textGC, m_textBackgroundColour.GetColor() );
 691 };
 692
 693 void wxPaintDC::SetBackgroundMode( int mode )
 694 {
 695   m_backgroundMode = mode;
 696 };
 697
 698 void wxPaintDC::SetPalette( const wxPalette& WXUNUSED(palette) )
 699 {
 700 };
 701
 702 void wxPaintDC::SetClippingRegion( long x, long y, long width, long height )
 703 {
 704   wxDC::SetClippingRegion( x, y, width, height );
 705
 706   GdkRectangle rect;
 707   rect.x = XLOG2DEV(x);
 708   rect.y = YLOG2DEV(y);
 709   rect.width = XLOG2DEV(x+width);
 710   rect.height = YLOG2DEV(y+height);
 711   gdk_gc_set_clip_rectangle( m_penGC, &rect );
 712   gdk_gc_set_clip_rectangle( m_brushGC, &rect );
 713   gdk_gc_set_clip_rectangle( m_textGC, &rect );
 714   gdk_gc_set_clip_rectangle( m_bgGC, &rect );
 715
 716 };
 717
 718 void wxPaintDC::DestroyClippingRegion(void)
 719 {
 720   wxDC::DestroyClippingRegion();
 721
 722   gdk_gc_set_clip_rectangle( m_penGC, NULL );
 723   gdk_gc_set_clip_rectangle( m_brushGC, NULL );
 724   gdk_gc_set_clip_rectangle( m_textGC, NULL );
 725   gdk_gc_set_clip_rectangle( m_bgGC, NULL );
 726 };
 727
 728 void wxPaintDC::SetUpDC(void)
 729 {
 730   m_ok = TRUE;
 731   m_logicalFunction = wxCOPY;
 732   m_penGC = gdk_gc_new( m_window );
 733   m_brushGC = gdk_gc_new( m_window );
 734   m_textGC = gdk_gc_new( m_window );
 735   m_bgGC = gdk_gc_new( m_window );
 736   SetTextForeground( m_textForegroundColour );
 737   SetTextBackground( m_textBackgroundColour );
 738   SetPen( m_pen );
 739   SetFont( m_font );
 740   SetBrush( m_brush );
 741
 742   gdk_gc_set_background( m_penGC, wxWHITE->GetColor() );
 743
 744   if (!hatch_bitmap)
 745   {
 746     hatch_bitmap    = hatches;
 747     hatch_bitmap[0] = gdk_bitmap_create_from_data( NULL, bdiag_bits, bdiag_width, bdiag_height );
 748     hatch_bitmap[1] = gdk_bitmap_create_from_data( NULL, cdiag_bits, cdiag_width, cdiag_height );
 749     hatch_bitmap[2] = gdk_bitmap_create_from_data( NULL, fdiag_bits, fdiag_width, fdiag_height );
 750     hatch_bitmap[3] = gdk_bitmap_create_from_data( NULL, cross_bits, cross_width, cross_height );
 751     hatch_bitmap[4] = gdk_bitmap_create_from_data( NULL, horiz_bits, horiz_width, horiz_height );
 752     hatch_bitmap[5] = gdk_bitmap_create_from_data( NULL, verti_bits, verti_width, verti_height );
 753   };
 754 };
 755
 756 GdkWindow *wxPaintDC::GetWindow(void)
 757 {
 758   return m_window;
 759 };
 760
 761 // ----------------------------------- spline code ----------------------------------------
 762
 763 void wx_quadratic_spline(double a1, double b1, double a2, double b2,
 764                          double a3, double b3, double a4, double b4);
 765 void wx_clear_stack(void);
 766 int wx_spline_pop(double *x1, double *y1, double *x2, double *y2, double *x3,
 767         double *y3, double *x4, double *y4);
 768 void wx_spline_push(double x1, double y1, double x2, double y2, double x3, double y3,
 769           double x4, double y4);
 770 static bool wx_spline_add_point(double x, double y);
 771 static void wx_spline_draw_point_array(wxDC *dc);
 772
 773 wxList wx_spline_point_list;
 774
 775 #define         half(z1, z2)    ((z1+z2)/2.0)
 776 #define         THRESHOLD       5
 777
 778 /* iterative version */
 779
 780 void wx_quadratic_spline(double a1, double b1, double a2, double b2, double a3, double b3, double a4,
 781                  double b4)
 782 {
 783     register double  xmid, ymid;
 784     double           x1, y1, x2, y2, x3, y3, x4, y4;
 785
 786     wx_clear_stack();
 787     wx_spline_push(a1, b1, a2, b2, a3, b3, a4, b4);
 788
 789     while (wx_spline_pop(&x1, &y1, &x2, &y2, &x3, &y3, &x4, &y4)) {
 790         xmid = (double)half(x2, x3);
 791         ymid = (double)half(y2, y3);
 792         if (fabs(x1 - xmid) < THRESHOLD && fabs(y1 - ymid) < THRESHOLD &&
 793             fabs(xmid - x4) < THRESHOLD && fabs(ymid - y4) < THRESHOLD) {
 794             wx_spline_add_point( x1, y1 );
 795             wx_spline_add_point( xmid, ymid );
 796         } else {
 797             wx_spline_push(xmid, ymid, (double)half(xmid, x3), (double)half(ymid, y3),
 798                  (double)half(x3, x4), (double)half(y3, y4), x4, y4);
 799             wx_spline_push(x1, y1, (double)half(x1, x2), (double)half(y1, y2),
 800                  (double)half(x2, xmid), (double)half(y2, ymid), xmid, ymid);
 801         }
 802     }
 803 }
 804
 805 /* utilities used by spline drawing routines */
 806
 807 typedef struct wx_spline_stack_struct {
 808     double           x1, y1, x2, y2, x3, y3, x4, y4;
 809 } Stack;
 810
 811 #define         SPLINE_STACK_DEPTH             20
 812 static Stack    wx_spline_stack[SPLINE_STACK_DEPTH];
 813 static Stack   *wx_stack_top;
 814 static int      wx_stack_count;
 815
 816 void wx_clear_stack(void)
 817 {
 818     wx_stack_top = wx_spline_stack;
 819     wx_stack_count = 0;
 820 }
 821
 822 void wx_spline_push(double x1, double y1, double x2, double y2, double x3, double y3, double x4, double y4)
 823 {
 824     wx_stack_top->x1 = x1;
 825     wx_stack_top->y1 = y1;
 826     wx_stack_top->x2 = x2;
 827     wx_stack_top->y2 = y2;
 828     wx_stack_top->x3 = x3;
 829     wx_stack_top->y3 = y3;
 830     wx_stack_top->x4 = x4;
 831     wx_stack_top->y4 = y4;
 832     wx_stack_top++;
 833     wx_stack_count++;
 834 }
 835
 836 int wx_spline_pop(double *x1, double *y1, double *x2, double *y2,
 837                   double *x3, double *y3, double *x4, double *y4)
 838 {
 839     if (wx_stack_count == 0)
 840         return (0);
 841     wx_stack_top--;
 842     wx_stack_count--;
 843     *x1 = wx_stack_top->x1;
 844     *y1 = wx_stack_top->y1;
 845     *x2 = wx_stack_top->x2;
 846     *y2 = wx_stack_top->y2;
 847     *x3 = wx_stack_top->x3;
 848     *y3 = wx_stack_top->y3;
 849     *x4 = wx_stack_top->x4;
 850     *y4 = wx_stack_top->y4;
 851     return (1);
 852 }
 853
 854 static bool wx_spline_add_point(double x, double y)
 855 {
 856   wxPoint *point = new wxPoint ;
 857   point->x = (int) x;
 858   point->y = (int) y;
 859   wx_spline_point_list.Append((wxObject*)point);
 860   return TRUE;
 861 }
 862
 863 static void wx_spline_draw_point_array(wxDC *dc)
 864 {
 865   dc->DrawLines(&wx_spline_point_list, 0, 0 );
 866   wxNode *node = wx_spline_point_list.First();
 867   while (node)
 868   {
 869     wxPoint *point = (wxPoint *)node->Data();
 870     delete point;
 871     delete node;
 872     node = wx_spline_point_list.First();
 873   }
 874 }
 875
 876 void wxPaintDC::DrawOpenSpline( wxList *points )
 877 {
 878     wxPoint *p;
 879     double           cx1, cy1, cx2, cy2, cx3, cy3, cx4, cy4;
 880     double           x1, y1, x2, y2;
 881
 882     wxNode *node = points->First();
 883     p = (wxPoint *)node->Data();
 884
 885     x1 = p->x;
 886     y1 = p->y;
 887
 888     node = node->Next();
 889     p = (wxPoint *)node->Data();
 890
 891     x2 = p->x;
 892     y2 = p->y;
 893     cx1 = (double)((x1 + x2) / 2);
 894     cy1 = (double)((y1 + y2) / 2);
 895     cx2 = (double)((cx1 + x2) / 2);
 896     cy2 = (double)((cy1 + y2) / 2);
 897
 898     wx_spline_add_point(x1, y1);
 899
 900     while ((node = node->Next()) != NULL)
 901     {
 902         p = (wxPoint *)node->Data();
 903         x1 = x2;
 904         y1 = y2;
 905         x2 = p->x;
 906         y2 = p->y;
 907         cx4 = (double)(x1 + x2) / 2;
 908         cy4 = (double)(y1 + y2) / 2;
 909         cx3 = (double)(x1 + cx4) / 2;
 910         cy3 = (double)(y1 + cy4) / 2;
 911
 912         wx_quadratic_spline(cx1, cy1, cx2, cy2, cx3, cy3, cx4, cy4);
 913
 914         cx1 = cx4;
 915         cy1 = cy4;
 916         cx2 = (double)(cx1 + x2) / 2;
 917         cy2 = (double)(cy1 + y2) / 2;
 918     }
 919
 920     wx_spline_add_point( cx1, cy1 );
 921     wx_spline_add_point( x2, y2 );
 922
 923     wx_spline_draw_point_array( this );
 924 };