src/gtk1/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     wxRegion update = window->GetUpdateRegion();
 120     if (update.Empty()) return;
 121
 122     gdk_gc_set_clip_region( m_penGC, update.GetRegion() );
 123     gdk_gc_set_clip_region( m_brushGC, update.GetRegion() );
 124     gdk_gc_set_clip_region( m_textGC, update.GetRegion() );
 125     gdk_gc_set_clip_region( m_bgGC, update.GetRegion() );
 126 }
 127
 128 wxPaintDC::~wxPaintDC(void)
 129 {
 130     Destroy();
 131 }
 132
 133 void wxPaintDC::FloodFill( long WXUNUSED(x1), long WXUNUSED(y1),
 134                            wxColour *WXUNUSED(col), int WXUNUSED(style) )
 135 {
 136     wxFAIL_MSG( "wxPaintDC::FloodFill not implemented" );
 137 }
 138
 139 bool wxPaintDC::GetPixel( long WXUNUSED(x1), long WXUNUSED(y1), wxColour *WXUNUSED(col) ) const
 140 {
 141     wxFAIL_MSG( "wxPaintDC::GetPixel not implemented" );
 142     return FALSE;
 143 }
 144
 145 void wxPaintDC::DrawLine( long x1, long y1, long x2, long y2 )
 146 {
 147     if (!Ok()) return;
 148
 149     if (m_pen.GetStyle() != wxTRANSPARENT)
 150     {
 151         gdk_draw_line( m_window, m_penGC,
 152                        XLOG2DEV(x1), YLOG2DEV(y1), XLOG2DEV(x2), YLOG2DEV(y2) );
 153     }
 154
 155     CalcBoundingBox(x1, y1);
 156     CalcBoundingBox(x2, y2);
 157 }
 158
 159 void wxPaintDC::CrossHair( long x, long y )
 160 {
 161     if (!Ok()) return;
 162
 163     if (m_pen.GetStyle() != wxTRANSPARENT)
 164     {
 165         int w = 0;
 166         int h = 0;
 167         GetSize( &w, &h );
 168         long xx = XLOG2DEV(x);
 169         long yy = YLOG2DEV(y);
 170         gdk_draw_line( m_window, m_penGC, 0, yy, XLOG2DEVREL(w), yy );
 171         gdk_draw_line( m_window, m_penGC, xx, 0, xx, YLOG2DEVREL(h) );
 172     }
 173 }
 174
 175 void wxPaintDC::DrawArc( long x1, long y1, long x2, long y2, double xc, double yc )
 176 {
 177     if (!Ok()) return;
 178
 179     long xx1 = XLOG2DEV(x1);
 180     long yy1 = YLOG2DEV(y1);
 181     long xx2 = XLOG2DEV(x2);
 182     long yy2 = YLOG2DEV(y2);
 183     long xxc = XLOG2DEV((long)xc);
 184     long yyc = YLOG2DEV((long)yc);
 185     double dx = xx1 - xxc;
 186     double dy = yy1 - yyc;
 187     double radius = sqrt(dx*dx+dy*dy);
 188     long   r      = (long)radius;
 189     double radius1, radius2;
 190
 191     if (xx1 == xx2 && yy1 == yy2)
 192     {
 193         radius1 = 0.0;
 194         radius2 = 360.0;
 195     }
 196     else
 197     if (radius == 0.0)
 198     {
 199         radius1 = radius2 = 0.0;
 200     }
 201     else
 202     {
 203         radius1 = (xx1 - xxc == 0) ?
 204             (yy1 - yyc < 0) ? 90.0 : -90.0 :
 205             -atan2(double(yy1-yyc), double(xx1-xxc)) * RAD2DEG;
 206         radius2 = (xx2 - xxc == 0) ?
 207             (yy2 - yyc < 0) ? 90.0 : -90.0 :
 208             -atan2(double(yy2-yyc), double(xx2-xxc)) * RAD2DEG;
 209     }
 210     long alpha1 = long(radius1 * 64.0);
 211     long alpha2 = long((radius2 - radius1) * 64.0);
 212     while (alpha2 <= 0) alpha2 += 360*64;
 213     while (alpha1 > 360*64) alpha1 -= 360*64;
 214
 215     if (m_brush.GetStyle() != wxTRANSPARENT)
 216         gdk_draw_arc( m_window, m_brushGC, TRUE, xxc-r, yyc-r, 2*r,2*r, alpha1, alpha2 );
 217
 218     if (m_pen.GetStyle() != wxTRANSPARENT)
 219         gdk_draw_arc( m_window, m_penGC, FALSE, xxc-r, yyc-r, 2*r,2*r, alpha1, alpha2 );
 220
 221     CalcBoundingBox (x1, y1);
 222     CalcBoundingBox (x2, y2);
 223 }
 224
 225 void wxPaintDC::DrawEllipticArc( long x, long y, long width, long height, double sa, double ea )
 226 {
 227     if (!Ok()) return;
 228
 229     long xx = XLOG2DEV(x);
 230     long yy = YLOG2DEV(y);
 231     long ww = m_signX * XLOG2DEVREL(width);
 232     long hh = m_signY * YLOG2DEVREL(height);
 233
 234     // CMB: handle -ve width and/or height
 235     if (ww < 0) { ww = -ww; xx = xx - ww; }
 236     if (hh < 0) { hh = -hh; yy = yy - hh; }
 237
 238     long start = long(sa * 64.0);
 239     long end = long(ea * 64.0);
 240     if (m_brush.GetStyle() != wxTRANSPARENT)
 241         gdk_draw_arc( m_window, m_brushGC, TRUE, xx, yy, ww, hh, start, end );
 242
 243     if (m_pen.GetStyle() != wxTRANSPARENT)
 244         gdk_draw_arc( m_window, m_penGC, FALSE, xx, yy, ww, hh, start, end );
 245
 246     CalcBoundingBox (x, y);
 247     CalcBoundingBox (x + width, y + height);
 248 }
 249
 250 void wxPaintDC::DrawPoint( long x, long y )
 251 {
 252     if (!Ok()) return;
 253
 254     if (m_pen.GetStyle() != wxTRANSPARENT)
 255         gdk_draw_point( m_window, m_penGC, XLOG2DEV(x), YLOG2DEV(y) );
 256
 257     CalcBoundingBox (x, y);
 258 }
 259
 260 void wxPaintDC::DrawLines( int n, wxPoint points[], long xoffset, long yoffset )
 261 {
 262     if (!Ok()) return;
 263
 264     if (m_pen.GetStyle() == wxTRANSPARENT) return;
 265     if (n <= 0) return;
 266
 267     CalcBoundingBox( points[0].x + xoffset, points[0].y + yoffset );
 268
 269     for (int i = 0; i < n-1; i++)
 270     {
 271         long x1 = XLOG2DEV(points[i].x + xoffset);
 272         long x2 = XLOG2DEV(points[i+1].x + xoffset);
 273         long y1 = YLOG2DEV(points[i].y + yoffset);     // oh, what a waste
 274         long y2 = YLOG2DEV(points[i+1].y + yoffset);
 275         gdk_draw_line( m_window, m_penGC, x1, y1, x2, y2 );
 276
 277         CalcBoundingBox( points[i+1].x + xoffset, points[i+1].y + yoffset );
 278     }
 279 }
 280
 281 void wxPaintDC::DrawLines( wxList *points, long xoffset, long yoffset )
 282 {
 283     if (!Ok()) return;
 284
 285     if (m_pen.GetStyle() == wxTRANSPARENT) return;
 286
 287     wxNode *node = points->First();
 288     if (!node) return;
 289
 290     wxPoint *pt = (wxPoint*)node->Data();
 291     CalcBoundingBox( pt->x + xoffset, pt->y + yoffset );
 292
 293     while (node->Next())
 294     {
 295         wxPoint *point = (wxPoint*)node->Data();
 296         wxPoint *npoint = (wxPoint*)node->Next()->Data();
 297         long x1 = XLOG2DEV(point->x + xoffset);
 298         long x2 = XLOG2DEV(npoint->x + xoffset);
 299         long y1 = YLOG2DEV(point->y + yoffset);    // and a waste again...
 300         long y2 = YLOG2DEV(npoint->y + yoffset);
 301         gdk_draw_line( m_window, m_penGC, x1, y1, x2, y2 );
 302         node = node->Next();
 303
 304         CalcBoundingBox( npoint->x + xoffset, npoint->y + yoffset );
 305     }
 306 }
 307
 308 void wxPaintDC::DrawPolygon( int n, wxPoint points[], long xoffset, long yoffset, int WXUNUSED(fillStyle) )
 309 {
 310     if (!Ok()) return;
 311
 312     if (!n) return;
 313
 314     GdkPoint *gdkpoints = new GdkPoint[n+1];
 315     int i;
 316     for (i = 0 ; i < n ; i++)
 317     {
 318         gdkpoints[i].x = XLOG2DEV(points[i].x + xoffset);
 319         gdkpoints[i].y = YLOG2DEV(points[i].y + yoffset);
 320
 321         CalcBoundingBox( points[i].x + xoffset, points[i].y + yoffset );
 322     }
 323
 324     if (m_brush.GetStyle() != wxTRANSPARENT)
 325         gdk_draw_polygon (m_window, m_brushGC, TRUE, gdkpoints, n);
 326
 327     // To do: Fillstyle
 328
 329     if (m_pen.GetStyle() != wxTRANSPARENT)
 330         for (i = 0 ; i < n ; i++)
 331         {
 332             gdk_draw_line( m_window, m_penGC,
 333                            gdkpoints[i%n].x,
 334                            gdkpoints[i%n].y,
 335                            gdkpoints[(i+1)%n].x,
 336                            gdkpoints[(i+1)%n].y);
 337         }
 338
 339     delete[] gdkpoints;
 340 }
 341
 342 void wxPaintDC::DrawPolygon( wxList *lines, long xoffset, long yoffset, int WXUNUSED(fillStyle))
 343 {
 344     if (!Ok()) return;
 345
 346     int n = lines->Number();
 347     if (!n) return;
 348
 349     GdkPoint *gdkpoints = new GdkPoint[n];
 350     wxNode *node = lines->First();
 351     int cnt = 0;
 352     while (node)
 353     {
 354         wxPoint *p = (wxPoint *) node->Data();
 355         gdkpoints[cnt].x = XLOG2DEV(p->x + xoffset);
 356         gdkpoints[cnt].y = YLOG2DEV(p->y + yoffset);
 357         node = node->Next();
 358         cnt++;
 359
 360         CalcBoundingBox( p->x + xoffset, p->y + yoffset );
 361     }
 362
 363     if (m_brush.GetStyle() != wxTRANSPARENT)
 364         gdk_draw_polygon (m_window, m_brushGC, TRUE, gdkpoints, n);
 365
 366     // To do: Fillstyle
 367
 368     if (m_pen.GetStyle() != wxTRANSPARENT)
 369     {
 370         int i;
 371         for (i = 0 ; i < n ; i++)
 372         {
 373             gdk_draw_line( m_window, m_penGC,
 374                            gdkpoints[i%n].x,
 375                            gdkpoints[i%n].y,
 376                            gdkpoints[(i+1)%n].x,
 377                            gdkpoints[(i+1)%n].y );
 378         }
 379     }
 380     delete[] gdkpoints;
 381 }
 382
 383 void wxPaintDC::DrawRectangle( long x, long y, long width, long height )
 384 {
 385     if (!Ok()) return;
 386
 387     long xx = XLOG2DEV(x);
 388     long yy = YLOG2DEV(y);
 389     long ww = m_signX * XLOG2DEVREL(width);
 390     long hh = m_signY * YLOG2DEVREL(height);
 391
 392     // CMB: draw nothing if transformed w or h is 0
 393     if (ww == 0 || hh == 0) return;
 394
 395     // CMB: handle -ve width and/or height
 396     if (ww < 0) { ww = -ww; xx = xx - ww; }
 397     if (hh < 0) { hh = -hh; yy = yy - hh; }
 398
 399     if (m_brush.GetStyle() != wxTRANSPARENT)
 400       gdk_draw_rectangle( m_window, m_brushGC, TRUE, xx, yy, ww, hh );
 401
 402     if (m_pen.GetStyle() != wxTRANSPARENT)
 403       gdk_draw_rectangle( m_window, m_penGC, FALSE, xx, yy, ww-1, hh-1 );
 404
 405     CalcBoundingBox( x, y );
 406     CalcBoundingBox( x + width, y + height );
 407 }
 408
 409 void wxPaintDC::DrawRoundedRectangle( long x, long y, long width, long height, double radius )
 410 {
 411     if (!Ok()) return;
 412
 413     if (radius < 0.0) radius = - radius * ((width < height) ? width : height);
 414
 415     long xx = XLOG2DEV(x);
 416     long yy = YLOG2DEV(y);
 417     long ww = m_signX * XLOG2DEVREL(width);
 418     long hh = m_signY * YLOG2DEVREL(height);
 419     long rr = XLOG2DEVREL((long)radius);
 420
 421     // CMB: handle -ve width and/or height
 422     if (ww < 0) { ww = -ww; xx = xx - ww; }
 423     if (hh < 0) { hh = -hh; yy = yy - hh; }
 424
 425     // CMB: if radius is zero use DrawRectangle() instead to avoid
 426     // X drawing errors with small radii
 427     if (rr == 0)
 428     {
 429         DrawRectangle( x, y, width, height );
 430         return;
 431     }
 432
 433     // CMB: draw nothing if transformed w or h is 0
 434     if (ww == 0 || hh == 0) return;
 435
 436     // CMB: adjust size if outline is drawn otherwise the result is
 437     // 1 pixel too wide and high
 438     if (m_pen.GetStyle() != wxTRANSPARENT)
 439     {
 440         ww--;
 441         hh--;
 442     }
 443
 444     // CMB: ensure dd is not larger than rectangle otherwise we
 445     // get an hour glass shape
 446     long dd = 2 * rr;
 447     if (dd > ww) dd = ww;
 448     if (dd > hh) dd = hh;
 449     rr = dd / 2;
 450
 451     if (m_brush.GetStyle() != wxTRANSPARENT)
 452     {
 453         gdk_draw_rectangle( m_window, m_brushGC, TRUE, xx+rr, yy, ww-dd+1, hh );
 454         gdk_draw_rectangle( m_window, m_brushGC, TRUE, xx, yy+rr, ww, hh-dd+1 );
 455         gdk_draw_arc( m_window, m_brushGC, TRUE, xx, yy, dd, dd, 90*64, 90*64 );
 456         gdk_draw_arc( m_window, m_brushGC, TRUE, xx+ww-dd, yy, dd, dd, 0, 90*64 );
 457         gdk_draw_arc( m_window, m_brushGC, TRUE, xx+ww-dd, yy+hh-dd, dd, dd, 270*64, 90*64 );
 458         gdk_draw_arc( m_window, m_brushGC, TRUE, xx, yy+hh-dd, dd, dd, 180*64, 90*64 );
 459     }
 460
 461     if (m_pen.GetStyle() != wxTRANSPARENT)
 462     {
 463         gdk_draw_line( m_window, m_penGC, xx+rr, yy, xx+ww-rr, yy );
 464         gdk_draw_line( m_window, m_penGC, xx+rr, yy+hh, xx+ww-rr, yy+hh );
 465         gdk_draw_line( m_window, m_penGC, xx, yy+rr, xx, yy+hh-rr );
 466         gdk_draw_line( m_window, m_penGC, xx+ww, yy+rr, xx+ww, yy+hh-rr );
 467         gdk_draw_arc( m_window, m_penGC, FALSE, xx, yy, dd, dd, 90*64, 90*64 );
 468         gdk_draw_arc( m_window, m_penGC, FALSE, xx+ww-dd, yy, dd, dd, 0, 90*64 );
 469         gdk_draw_arc( m_window, m_penGC, FALSE, xx+ww-dd, yy+hh-dd, dd, dd, 270*64, 90*64 );
 470         gdk_draw_arc( m_window, m_penGC, FALSE, xx, yy+hh-dd, dd, dd, 180*64, 90*64 );
 471     }
 472
 473     // this ignores the radius
 474     CalcBoundingBox( x, y );
 475     CalcBoundingBox( x + width, y + height );
 476 }
 477
 478 void wxPaintDC::DrawEllipse( long x, long y, long width, long height )
 479 {
 480     if (!Ok()) return;
 481
 482     long xx = XLOG2DEV(x);
 483     long yy = YLOG2DEV(y);
 484     long ww = m_signX * XLOG2DEVREL(width);
 485     long hh = m_signY * YLOG2DEVREL(height);
 486
 487     // CMB: handle -ve width and/or height
 488     if (ww < 0) { ww = -ww; xx = xx - ww; }
 489     if (hh < 0) { hh = -hh; yy = yy - hh; }
 490
 491     if (m_brush.GetStyle() != wxTRANSPARENT)
 492         gdk_draw_arc( m_window, m_brushGC, TRUE, xx, yy, ww, hh, 0, 360*64 );
 493
 494     if (m_pen.GetStyle() != wxTRANSPARENT)
 495         gdk_draw_arc( m_window, m_penGC, FALSE, xx, yy, ww, hh, 0, 360*64 );
 496
 497     CalcBoundingBox( x, y );
 498     CalcBoundingBox( x + width, y + height );
 499 }
 500
 501 bool wxPaintDC::CanDrawBitmap(void) const
 502 {
 503   return TRUE;
 504 }
 505
 506 void wxPaintDC::DrawIcon( const wxIcon &icon, long x, long y, bool useMask )
 507 {
 508     if (!Ok()) return;
 509
 510     if (!icon.Ok()) return;
 511
 512     int xx = XLOG2DEV(x);
 513     int yy = YLOG2DEV(y);
 514
 515     GdkBitmap *mask = (GdkBitmap *) NULL;
 516     if (icon.GetMask()) mask = icon.GetMask()->GetBitmap();
 517
 518     if (useMask && mask)
 519     {
 520         gdk_gc_set_clip_mask( m_penGC, mask );
 521         gdk_gc_set_clip_origin( m_penGC, xx, yy );
 522     }
 523
 524     GdkPixmap *pm = icon.GetPixmap();
 525     gdk_draw_pixmap( m_window, m_penGC, pm, 0, 0, xx, yy, -1, -1 );
 526
 527     if (useMask && mask)
 528     {
 529         gdk_gc_set_clip_mask( m_penGC, (GdkBitmap *) NULL );
 530         gdk_gc_set_clip_origin( m_penGC, 0, 0 );
 531     }
 532
 533     CalcBoundingBox( x, y );
 534     int width = icon.GetWidth();
 535     int height = icon.GetHeight();
 536     CalcBoundingBox( x + width, y + height );
 537 }
 538
 539 bool wxPaintDC::Blit( long xdest, long ydest, long width, long height,
 540        wxDC *source, long xsrc, long ysrc, int WXUNUSED(logical_func), bool useMask )
 541 {
 542     if (!Ok()) return FALSE;
 543
 544     CalcBoundingBox( xdest, ydest );
 545     CalcBoundingBox( xdest + width, ydest + height );
 546
 547     wxClientDC *csrc = (wxClientDC*)source;
 548
 549     if (csrc->m_isMemDC)
 550     {
 551         wxMemoryDC* srcDC = (wxMemoryDC*)source;
 552         GdkPixmap* pmap = srcDC->m_selected.GetPixmap();
 553         if (pmap)
 554         {
 555             long xx = XLOG2DEV(xdest);
 556             long yy = YLOG2DEV(ydest);
 557
 558             GdkBitmap *mask = (GdkBitmap *) NULL;
 559             if (srcDC->m_selected.GetMask()) mask = srcDC->m_selected.GetMask()->GetBitmap();
 560
 561             if (useMask && mask)
 562             {
 563                 gdk_gc_set_clip_mask( m_textGC, mask );
 564                 gdk_gc_set_clip_origin( m_textGC, xx, yy );
 565             }
 566
 567             gdk_draw_pixmap( m_window, m_textGC, pmap,
 568                              source->DeviceToLogicalX(xsrc),
 569                              source->DeviceToLogicalY(ysrc),
 570                              xx,
 571                              yy,
 572                              source->DeviceToLogicalXRel(width),
 573                              source->DeviceToLogicalYRel(height) );
 574
 575             if (useMask && mask)
 576             {
 577                 gdk_gc_set_clip_mask( m_textGC, (GdkBitmap *) NULL );
 578                 gdk_gc_set_clip_origin( m_textGC, 0, 0 );
 579             }
 580
 581             return TRUE;
 582         }
 583
 584         GdkBitmap* bmap = srcDC->m_selected.GetBitmap();
 585         if (bmap)
 586         {
 587             long xx = XLOG2DEV(xdest);
 588             long yy = YLOG2DEV(ydest);
 589
 590             GdkBitmap *mask = (GdkBitmap *) NULL;
 591             if (srcDC->m_selected.GetMask()) mask = srcDC->m_selected.GetMask()->GetBitmap();
 592
 593             if (useMask && mask)
 594             {
 595                 gdk_gc_set_clip_mask( m_textGC, mask );
 596                 gdk_gc_set_clip_origin( m_textGC, xx, yy );
 597             }
 598
 599             gdk_draw_bitmap( m_window, m_textGC, bmap,
 600                              source->DeviceToLogicalX(xsrc),
 601                              source->DeviceToLogicalY(ysrc),
 602                              xx,
 603                              yy,
 604                              source->DeviceToLogicalXRel(width),
 605                              source->DeviceToLogicalYRel(height) );
 606
 607             if (useMask && mask)
 608             {
 609                 gdk_gc_set_clip_mask( m_textGC, (GdkBitmap *) NULL );
 610                 gdk_gc_set_clip_origin( m_textGC, 0, 0 );
 611             }
 612
 613             return TRUE;
 614         }
 615     }
 616
 617     gdk_window_copy_area ( m_window, m_textGC,
 618                            XLOG2DEV(xdest), YLOG2DEV(ydest),
 619                            csrc->GetWindow(),
 620                            source->DeviceToLogicalX(xsrc),
 621                            source->DeviceToLogicalY(ysrc),
 622                            source->DeviceToLogicalXRel(width),
 623                            source->DeviceToLogicalYRel(height) );
 624
 625 /*
 626     gdk_window_copy_area ( m_window, m_textGC,
 627                            XLOG2DEV(xdest), YLOG2DEV(ydest),
 628                            csrc->GetWindow(),
 629                            xsrc, ysrc,
 630                            width, height );
 631 */
 632
 633   return TRUE;
 634 }
 635
 636 void wxPaintDC::DrawText( const wxString &text, long x, long y, bool WXUNUSED(use16) )
 637 {
 638     if (!Ok()) return;
 639
 640     GdkFont *font = m_font.GetInternalFont( m_scaleY );
 641
 642     x = XLOG2DEV(x);
 643     y = YLOG2DEV(y);
 644
 645     // CMB 21/5/98: draw text background if mode is wxSOLID
 646     if (m_backgroundMode == wxSOLID)
 647     {
 648         long width = gdk_string_width( font, text );
 649         long height = font->ascent + font->descent;
 650         gdk_gc_set_foreground( m_textGC, m_textBackgroundColour.GetColor() );
 651         gdk_draw_rectangle( m_window, m_textGC, TRUE, x, y, width, height );
 652         gdk_gc_set_foreground( m_textGC, m_textForegroundColour.GetColor() );
 653     }
 654     gdk_draw_string( m_window, font, m_textGC, x, y + font->ascent, text );
 655
 656     // CMB 17/7/98: simple underline: ignores scaling and underlying
 657     // X font's XA_UNDERLINE_POSITION and XA_UNDERLINE_THICKNESS
 658     // properties (see wxXt implementation)
 659     if (m_font.GetUnderlined())
 660     {
 661         long width = gdk_string_width( font, text );
 662         long ul_y = y + font->ascent;
 663         if (font->descent > 0) ul_y++;
 664         gdk_draw_line( m_window, m_textGC, x, ul_y, x + width, ul_y);
 665     }
 666
 667     long w, h;
 668     GetTextExtent (text, &w, &h);
 669     CalcBoundingBox (x + w, y + h);
 670     CalcBoundingBox (x, y);
 671 }
 672
 673 bool wxPaintDC::CanGetTextExtent(void) const
 674 {
 675     return TRUE;
 676 }
 677
 678 void wxPaintDC::GetTextExtent( const wxString &string, long *width, long *height,
 679                      long *descent, long *externalLeading,
 680                      wxFont *theFont, bool WXUNUSED(use16) )
 681 {
 682     if (!Ok()) return;
 683
 684     wxFont fontToUse = m_font;
 685     if (theFont) fontToUse = *theFont;
 686
 687     GdkFont *font = fontToUse.GetInternalFont( m_scaleY );
 688     if (width) (*width) = long(gdk_string_width( font, string ) / m_scaleX);
 689     if (height) (*height) = long((font->ascent + font->descent) / m_scaleY);
 690     if (descent) (*descent) = long(font->descent / m_scaleY);
 691     if (externalLeading) (*externalLeading) = 0;  // ??
 692 }
 693
 694 long wxPaintDC::GetCharWidth(void)
 695 {
 696     if (!Ok()) return 0;
 697
 698     GdkFont *font = m_font.GetInternalFont( m_scaleY );
 699     return long(gdk_string_width( font, "H" ) / m_scaleX);
 700 }
 701
 702 long wxPaintDC::GetCharHeight(void)
 703 {
 704     if (!Ok()) return 0;
 705
 706     GdkFont *font = m_font.GetInternalFont( m_scaleY );
 707     return long((font->ascent + font->descent) / m_scaleY);
 708 }
 709
 710 void wxPaintDC::Clear(void)
 711 {
 712     if (!Ok()) return;
 713
 714     if (!m_isMemDC)
 715     {
 716         gdk_window_clear( m_window );
 717     }
 718     else
 719     {
 720         int width,height;
 721         GetSize( &width, &height );
 722         gdk_draw_rectangle( m_window, m_bgGC, TRUE, 0, 0, width, height );
 723     }
 724 }
 725
 726 void wxPaintDC::SetFont( const wxFont &font )
 727 {
 728     if (!Ok()) return;
 729
 730     m_font = font;
 731 }
 732
 733 void wxPaintDC::SetPen( const wxPen &pen )
 734 {
 735     if (!Ok()) return;
 736
 737     if (m_pen == pen) return;
 738
 739     m_pen = pen;
 740
 741     if (!m_pen.Ok()) return;
 742
 743     gint width = m_pen.GetWidth();
 744     // CMB: if width is non-zero scale it with the dc
 745     if (width <= 0)
 746     {
 747         width = 1;
 748     }
 749     else
 750     {
 751         // X doesn't allow different width in x and y and so we take
 752         // the average
 753         double w = 0.5 + (abs(XLOG2DEVREL(width)) + abs(YLOG2DEVREL(width))) / 2.0;
 754         width = (int)w;
 755     }
 756
 757     GdkLineStyle lineStyle = GDK_LINE_SOLID;
 758     switch (m_pen.GetStyle())
 759     {
 760         case wxSOLID:      { lineStyle = GDK_LINE_SOLID;       break; }
 761         case wxDOT:        { lineStyle = GDK_LINE_ON_OFF_DASH; break; }
 762         case wxLONG_DASH:  { lineStyle = GDK_LINE_ON_OFF_DASH; break; }
 763         case wxSHORT_DASH: { lineStyle = GDK_LINE_ON_OFF_DASH; break; }
 764         case wxDOT_DASH:   { lineStyle = GDK_LINE_DOUBLE_DASH; break; }
 765     }
 766
 767     GdkCapStyle capStyle = GDK_CAP_ROUND;
 768     switch (m_pen.GetCap())
 769     {
 770         case wxCAP_ROUND:      { capStyle = (width <= 1) ? GDK_CAP_NOT_LAST : GDK_CAP_ROUND; break; }
 771         case wxCAP_PROJECTING: { capStyle = GDK_CAP_PROJECTING; break; }
 772         case wxCAP_BUTT:       { capStyle = GDK_CAP_BUTT;       break; }
 773     }
 774
 775     GdkJoinStyle joinStyle = GDK_JOIN_ROUND;
 776     switch (m_pen.GetJoin())
 777     {
 778         case wxJOIN_BEVEL: { joinStyle = GDK_JOIN_BEVEL; break; }
 779         case wxJOIN_ROUND: { joinStyle = GDK_JOIN_ROUND; break; }
 780         case wxJOIN_MITER: { joinStyle = GDK_JOIN_MITER; break; }
 781     }
 782
 783     gdk_gc_set_line_attributes( m_penGC, width, lineStyle, capStyle, joinStyle );
 784
 785     m_pen.GetColour().CalcPixel( m_cmap );
 786     gdk_gc_set_foreground( m_penGC, m_pen.GetColour().GetColor() );
 787 }
 788
 789 void wxPaintDC::SetBrush( const wxBrush &brush )
 790 {
 791     if (!Ok()) return;
 792
 793     if (m_brush == brush) return;
 794
 795     m_brush = brush;
 796
 797     if (!m_brush.Ok()) return;
 798
 799     m_brush.GetColour().CalcPixel( m_cmap );
 800     gdk_gc_set_foreground( m_brushGC, m_brush.GetColour().GetColor() );
 801
 802     GdkFill fillStyle = GDK_SOLID;
 803     switch (m_brush.GetStyle())
 804     {
 805       case wxSOLID:
 806       case wxTRANSPARENT:
 807          break;
 808       default:
 809          fillStyle = GDK_STIPPLED;
 810     }
 811
 812     gdk_gc_set_fill( m_brushGC, fillStyle );
 813
 814     if (m_brush.GetStyle() == wxSTIPPLE)
 815     {
 816         gdk_gc_set_stipple( m_brushGC, m_brush.GetStipple()->GetPixmap() );
 817     }
 818
 819     if (IS_HATCH(m_brush.GetStyle()))
 820     {
 821         int num = m_brush.GetStyle() - wxBDIAGONAL_HATCH;
 822         gdk_gc_set_stipple( m_brushGC, hatches[num] );
 823     }
 824 }
 825
 826 // CMB 21/7/98: Added SetBackground. Sets background brush
 827 // for Clear() and bg colour for shapes filled with cross-hatch brush
 828 void wxPaintDC::SetBackground( const wxBrush &brush )
 829 {
 830     if (!Ok()) return;
 831
 832     if (m_backgroundBrush == brush) return;
 833
 834     m_backgroundBrush = brush;
 835
 836     if (!m_backgroundBrush.Ok()) return;
 837
 838     m_backgroundBrush.GetColour().CalcPixel( m_cmap );
 839     gdk_gc_set_background( m_brushGC, m_backgroundBrush.GetColour().GetColor() );
 840     gdk_gc_set_background( m_penGC, m_backgroundBrush.GetColour().GetColor() );
 841     gdk_gc_set_background( m_bgGC, m_backgroundBrush.GetColour().GetColor() );
 842     gdk_gc_set_foreground( m_bgGC, m_backgroundBrush.GetColour().GetColor() );
 843
 844     GdkFill fillStyle = GDK_SOLID;
 845     switch (m_backgroundBrush.GetStyle())
 846     {
 847       case wxSOLID:
 848       case wxTRANSPARENT:
 849         break;
 850       default:
 851         fillStyle = GDK_STIPPLED;
 852     }
 853
 854     gdk_gc_set_fill( m_bgGC, fillStyle );
 855
 856     if (m_backgroundBrush.GetStyle() == wxSTIPPLE)
 857     {
 858         gdk_gc_set_stipple( m_bgGC, m_backgroundBrush.GetStipple()->GetPixmap() );
 859     }
 860
 861     if (IS_HATCH(m_backgroundBrush.GetStyle()))
 862     {
 863         int num = m_backgroundBrush.GetStyle() - wxBDIAGONAL_HATCH;
 864         gdk_gc_set_stipple( m_bgGC, hatches[num] );
 865      }
 866 }
 867
 868 void wxPaintDC::SetLogicalFunction( int function )
 869 {
 870     if (m_logicalFunction == function) return;
 871     GdkFunction mode = GDK_COPY;
 872     switch (function)
 873     {
 874         case wxXOR:    mode = GDK_INVERT; break;
 875         case wxINVERT: mode = GDK_INVERT; break;
 876         default:       break;
 877     }
 878     m_logicalFunction = function;
 879     gdk_gc_set_function( m_penGC, mode );
 880     gdk_gc_set_function( m_brushGC, mode );
 881     gdk_gc_set_function( m_textGC, mode );
 882 }
 883
 884 void wxPaintDC::SetTextForeground( const wxColour &col )
 885 {
 886     if (!Ok()) return;
 887
 888     if (m_textForegroundColour == col) return;
 889
 890     m_textForegroundColour = col;
 891     if (!m_textForegroundColour.Ok()) return;
 892
 893     m_textForegroundColour.CalcPixel( m_cmap );
 894     gdk_gc_set_foreground( m_textGC, m_textForegroundColour.GetColor() );
 895 }
 896
 897 void wxPaintDC::SetTextBackground( const wxColour &col )
 898 {
 899     if (!Ok()) return;
 900
 901     if (m_textBackgroundColour == col) return;
 902
 903     m_textBackgroundColour = col;
 904     if (!m_textBackgroundColour.Ok()) return;
 905
 906     m_textBackgroundColour.CalcPixel( m_cmap );
 907     gdk_gc_set_background( m_textGC, m_textBackgroundColour.GetColor() );
 908 }
 909
 910 void wxPaintDC::SetBackgroundMode( int mode )
 911 {
 912     m_backgroundMode = mode;
 913
 914     // CMB 21/7/98: fill style of cross-hatch brushes is affected by
 915     // transparent/solid background mode
 916     if (m_brush.GetStyle() != wxSOLID && m_brush.GetStyle() != wxTRANSPARENT)
 917     {
 918         gdk_gc_set_fill( m_brushGC,
 919           (m_backgroundMode == wxTRANSPARENT) ? GDK_STIPPLED : GDK_OPAQUE_STIPPLED);
 920     }
 921 }
 922
 923 void wxPaintDC::SetPalette( const wxPalette& WXUNUSED(palette) )
 924 {
 925 }
 926
 927 void wxPaintDC::SetClippingRegion( long x, long y, long width, long height )
 928 {
 929     wxDC::SetClippingRegion( x, y, width, height );
 930
 931     GdkRectangle rect;
 932     rect.x = XLOG2DEV(x);
 933     rect.y = YLOG2DEV(y);
 934     rect.width = XLOG2DEVREL(width);
 935     rect.height = YLOG2DEVREL(height);
 936     gdk_gc_set_clip_rectangle( m_penGC, &rect );
 937     gdk_gc_set_clip_rectangle( m_brushGC, &rect );
 938     gdk_gc_set_clip_rectangle( m_textGC, &rect );
 939     gdk_gc_set_clip_rectangle( m_bgGC, &rect );
 940 }
 941
 942 void wxPaintDC::DestroyClippingRegion(void)
 943 {
 944     wxDC::DestroyClippingRegion();
 945
 946     gdk_gc_set_clip_rectangle( m_penGC, (GdkRectangle *) NULL );
 947     gdk_gc_set_clip_rectangle( m_brushGC, (GdkRectangle *) NULL );
 948     gdk_gc_set_clip_rectangle( m_textGC, (GdkRectangle *) NULL );
 949     gdk_gc_set_clip_rectangle( m_bgGC, (GdkRectangle *) NULL );
 950 }
 951
 952 void wxPaintDC::SetUpDC(void)
 953 {
 954     Destroy();
 955     m_ok = TRUE;
 956     m_logicalFunction = wxCOPY;
 957     m_penGC = gdk_gc_new( m_window );
 958     m_brushGC = gdk_gc_new( m_window );
 959     m_textGC = gdk_gc_new( m_window );
 960     m_bgGC = gdk_gc_new( m_window );
 961
 962     wxColour tmp_col( m_textForegroundColour );
 963     m_textForegroundColour = wxNullColour;
 964     SetTextForeground( tmp_col );
 965     tmp_col = m_textBackgroundColour;
 966     m_textBackgroundColour = wxNullColour;
 967     SetTextBackground( tmp_col );
 968
 969     wxPen tmp_pen( m_pen );
 970     m_pen = wxNullPen;
 971     SetPen( tmp_pen );
 972
 973     wxFont tmp_font( m_font );
 974     m_font = wxNullFont;
 975     SetFont( tmp_font );
 976
 977     wxBrush tmp_brush( m_brush );
 978     m_brush = wxNullBrush;
 979     SetBrush( tmp_brush );
 980
 981     tmp_brush = m_backgroundBrush;
 982     m_backgroundBrush = wxNullBrush;
 983     SetBackground( tmp_brush );
 984
 985     if (!hatch_bitmap)
 986     {
 987         hatch_bitmap    = hatches;
 988         hatch_bitmap[0] = gdk_bitmap_create_from_data( (GdkWindow *) NULL, bdiag_bits, bdiag_width, bdiag_height );
 989         hatch_bitmap[1] = gdk_bitmap_create_from_data( (GdkWindow *) NULL, cdiag_bits, cdiag_width, cdiag_height );
 990         hatch_bitmap[2] = gdk_bitmap_create_from_data( (GdkWindow *) NULL, fdiag_bits, fdiag_width, fdiag_height );
 991         hatch_bitmap[3] = gdk_bitmap_create_from_data( (GdkWindow *) NULL, cross_bits, cross_width, cross_height );
 992         hatch_bitmap[4] = gdk_bitmap_create_from_data( (GdkWindow *) NULL, horiz_bits, horiz_width, horiz_height );
 993         hatch_bitmap[5] = gdk_bitmap_create_from_data( (GdkWindow *) NULL, verti_bits, verti_width, verti_height );
 994     }
 995 }
 996
 997 void wxPaintDC::Destroy(void)
 998 {
 999     if (m_penGC) gdk_gc_unref( m_penGC );
1000     m_penGC = (GdkGC*) NULL;
1001     if (m_brushGC) gdk_gc_unref( m_brushGC );
1002     m_brushGC = (GdkGC*) NULL;
1003     if (m_textGC) gdk_gc_unref( m_textGC );
1004     m_textGC = (GdkGC*) NULL;
1005     if (m_bgGC) gdk_gc_unref( m_bgGC );
1006     m_bgGC = (GdkGC*) NULL;
1007 }
1008
1009 GdkWindow *wxPaintDC::GetWindow(void)
1010 {
1011     return m_window;
1012 }
1013
1014 // ----------------------------------- spline code ----------------------------------------
1015
1016 void wx_quadratic_spline(double a1, double b1, double a2, double b2,
1017                          double a3, double b3, double a4, double b4);
1018 void wx_clear_stack(void);
1019 int wx_spline_pop(double *x1, double *y1, double *x2, double *y2, double *x3,
1020         double *y3, double *x4, double *y4);
1021 void wx_spline_push(double x1, double y1, double x2, double y2, double x3, double y3,
1022           double x4, double y4);
1023 static bool wx_spline_add_point(double x, double y);
1024 static void wx_spline_draw_point_array(wxDC *dc);
1025
1026 wxList wx_spline_point_list;
1027
1028 #define         half(z1, z2)    ((z1+z2)/2.0)
1029 #define         THRESHOLD       5
1030
1031 /* iterative version */
1032
1033 void wx_quadratic_spline(double a1, double b1, double a2, double b2, double a3, double b3, double a4,
1034                  double b4)
1035 {
1036     register double  xmid, ymid;
1037     double           x1, y1, x2, y2, x3, y3, x4, y4;
1038
1039     wx_clear_stack();
1040     wx_spline_push(a1, b1, a2, b2, a3, b3, a4, b4);
1041
1042     while (wx_spline_pop(&x1, &y1, &x2, &y2, &x3, &y3, &x4, &y4)) {
1043         xmid = (double)half(x2, x3);
1044         ymid = (double)half(y2, y3);
1045         if (fabs(x1 - xmid) < THRESHOLD && fabs(y1 - ymid) < THRESHOLD &&
1046             fabs(xmid - x4) < THRESHOLD && fabs(ymid - y4) < THRESHOLD) {
1047             wx_spline_add_point( x1, y1 );
1048             wx_spline_add_point( xmid, ymid );
1049         } else {
1050             wx_spline_push(xmid, ymid, (double)half(xmid, x3), (double)half(ymid, y3),
1051                  (double)half(x3, x4), (double)half(y3, y4), x4, y4);
1052             wx_spline_push(x1, y1, (double)half(x1, x2), (double)half(y1, y2),
1053                  (double)half(x2, xmid), (double)half(y2, ymid), xmid, ymid);
1054         }
1055     }
1056 }
1057
1058 /* utilities used by spline drawing routines */
1059
1060 typedef struct wx_spline_stack_struct {
1061     double           x1, y1, x2, y2, x3, y3, x4, y4;
1062 } Stack;
1063
1064 #define         SPLINE_STACK_DEPTH             20
1065 static Stack    wx_spline_stack[SPLINE_STACK_DEPTH];
1066 static Stack   *wx_stack_top;
1067 static int      wx_stack_count;
1068
1069 void wx_clear_stack(void)
1070 {
1071     wx_stack_top = wx_spline_stack;
1072     wx_stack_count = 0;
1073 }
1074
1075 void wx_spline_push(double x1, double y1, double x2, double y2, double x3, double y3, double x4, double y4)
1076 {
1077     wx_stack_top->x1 = x1;
1078     wx_stack_top->y1 = y1;
1079     wx_stack_top->x2 = x2;
1080     wx_stack_top->y2 = y2;
1081     wx_stack_top->x3 = x3;
1082     wx_stack_top->y3 = y3;
1083     wx_stack_top->x4 = x4;
1084     wx_stack_top->y4 = y4;
1085     wx_stack_top++;
1086     wx_stack_count++;
1087 }
1088
1089 int wx_spline_pop(double *x1, double *y1, double *x2, double *y2,
1090                   double *x3, double *y3, double *x4, double *y4)
1091 {
1092     if (wx_stack_count == 0)
1093         return (0);
1094     wx_stack_top--;
1095     wx_stack_count--;
1096     *x1 = wx_stack_top->x1;
1097     *y1 = wx_stack_top->y1;
1098     *x2 = wx_stack_top->x2;
1099     *y2 = wx_stack_top->y2;
1100     *x3 = wx_stack_top->x3;
1101     *y3 = wx_stack_top->y3;
1102     *x4 = wx_stack_top->x4;
1103     *y4 = wx_stack_top->y4;
1104     return (1);
1105 }
1106
1107 static bool wx_spline_add_point(double x, double y)
1108 {
1109   wxPoint *point = new wxPoint ;
1110   point->x = (int) x;
1111   point->y = (int) y;
1112   wx_spline_point_list.Append((wxObject*)point);
1113   return TRUE;
1114 }
1115
1116 static void wx_spline_draw_point_array(wxDC *dc)
1117 {
1118   dc->DrawLines(&wx_spline_point_list, 0, 0 );
1119   wxNode *node = wx_spline_point_list.First();
1120   while (node)
1121   {
1122     wxPoint *point = (wxPoint *)node->Data();
1123     delete point;
1124     delete node;
1125     node = wx_spline_point_list.First();
1126   }
1127 }
1128
1129 void wxPaintDC::DrawSpline( wxList *points )
1130 {
1131     wxPoint *p;
1132     double           cx1, cy1, cx2, cy2, cx3, cy3, cx4, cy4;
1133     double           x1, y1, x2, y2;
1134
1135     wxNode *node = points->First();
1136     p = (wxPoint *)node->Data();
1137
1138     x1 = p->x;
1139     y1 = p->y;
1140
1141     node = node->Next();
1142     p = (wxPoint *)node->Data();
1143
1144     x2 = p->x;
1145     y2 = p->y;
1146     cx1 = (double)((x1 + x2) / 2);
1147     cy1 = (double)((y1 + y2) / 2);
1148     cx2 = (double)((cx1 + x2) / 2);
1149     cy2 = (double)((cy1 + y2) / 2);
1150
1151     wx_spline_add_point(x1, y1);
1152
1153     while ((node = node->Next()) != NULL)
1154     {
1155         p = (wxPoint *)node->Data();
1156         x1 = x2;
1157         y1 = y2;
1158         x2 = p->x;
1159         y2 = p->y;
1160         cx4 = (double)(x1 + x2) / 2;
1161         cy4 = (double)(y1 + y2) / 2;
1162         cx3 = (double)(x1 + cx4) / 2;
1163         cy3 = (double)(y1 + cy4) / 2;
1164
1165         wx_quadratic_spline(cx1, cy1, cx2, cy2, cx3, cy3, cx4, cy4);
1166
1167         cx1 = cx4;
1168         cy1 = cy4;
1169         cx2 = (double)(cx1 + x2) / 2;
1170         cy2 = (double)(cy1 + y2) / 2;
1171     }
1172
1173     wx_spline_add_point( cx1, cy1 );
1174     wx_spline_add_point( x2, y2 );
1175
1176     wx_spline_draw_point_array( this );
1177 }