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