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