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