src/motif/dc.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        dc.cpp
   3 // Purpose:     wxDC class
   4 // Author:      Julian Smart
   5 // Modified by:
   6 // Created:     01/02/97
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) Julian Smart
   9 // Licence:     wxWindows licence
  10 /////////////////////////////////////////////////////////////////////////////
  11
  12 #ifdef __GNUG__
  13 #pragma implementation "dc.h"
  14 #endif
  15
  16 #include "wx/dc.h"
  17 #include "wx/dcmemory.h"
  18
  19 #if !USE_SHARED_LIBRARY
  20 IMPLEMENT_ABSTRACT_CLASS(wxDC, wxObject)
  21 #endif
  22
  23 //-----------------------------------------------------------------------------
  24 // constants
  25 //-----------------------------------------------------------------------------
  26
  27 #define mm2inches               0.0393700787402
  28 #define inches2mm               25.4
  29 #define mm2twips                56.6929133859
  30 #define twips2mm                0.0176388888889
  31 #define mm2pt                   2.83464566929
  32 #define pt2mm                   0.352777777778
  33
  34 //-----------------------------------------------------------------------------
  35 // wxDC
  36 //-----------------------------------------------------------------------------
  37
  38 wxDC::wxDC(void)
  39 {
  40   m_ok = FALSE;
  41   m_optimize = FALSE;
  42   m_colour = TRUE;
  43   m_clipping = FALSE;
  44
  45   m_mm_to_pix_x = 1.0;
  46   m_mm_to_pix_y = 1.0;
  47
  48   m_logicalOriginX = 0;
  49   m_logicalOriginY = 0;
  50   m_deviceOriginX = 0;
  51   m_deviceOriginY = 0;
  52   m_internalDeviceOriginX = 0;
  53   m_internalDeviceOriginY = 0;
  54   m_externalDeviceOriginX = 0;
  55   m_externalDeviceOriginY = 0;
  56
  57   m_logicalScaleX = 1.0;
  58   m_logicalScaleY = 1.0;
  59   m_userScaleX = 1.0;
  60   m_userScaleY = 1.0;
  61   m_scaleX = 1.0;
  62   m_scaleY = 1.0;
  63
  64   m_mappingMode = MM_TEXT;
  65   m_needComputeScaleX = FALSE;
  66   m_needComputeScaleY = FALSE;
  67
  68   m_signX = 1;  // default x-axis left to right
  69   m_signY = 1;  // default y-axis top down
  70
  71   m_maxX = m_maxY = -100000;
  72   m_minY = m_minY =  100000;
  73
  74   m_logicalFunction = wxCOPY;
  75 //  m_textAlignment = wxALIGN_TOP_LEFT;
  76   m_backgroundMode = wxTRANSPARENT;
  77
  78   m_textForegroundColour = *wxBLACK;
  79   m_textBackgroundColour = *wxWHITE;
  80   m_pen = *wxBLACK_PEN;
  81   m_font = *wxNORMAL_FONT;
  82   m_brush = *wxTRANSPARENT_BRUSH;
  83   m_backgroundBrush = *wxWHITE_BRUSH;
  84
  85   m_isInteractive = FALSE;
  86
  87 //  m_palette = wxAPP_COLOURMAP;
  88 };
  89
  90 wxDC::~wxDC(void)
  91 {
  92 };
  93
  94 void wxDC::DrawIcon( const wxIcon &WXUNUSED(icon), long WXUNUSED(x), long WXUNUSED(y), bool WXUNUSED(useMask) )
  95 {
  96 };
  97
  98 void wxDC::DrawBitmap( const wxBitmap& bitmap, long x, long y, bool useMask )
  99 {
 100     if (!bitmap.Ok())
 101         return;
 102
 103     wxMemoryDC memDC;
 104     memDC.SelectObject(bitmap);
 105
 106 /* Not sure if we need this. The mask should leave the
 107  * masked areas as per the original background of this DC.
 108     if (useMask)
 109     {
 110         // There might be transparent areas, so make these
 111         // the same colour as this DC
 112         memDC.SetBackground(* GetBackground());
 113         memDC.Clear();
 114     }
 115 */
 116
 117     Blit(x, y, bitmap.GetWidth(), bitmap.GetHeight(), & memDC, 0, 0, wxCOPY, useMask);
 118
 119     memDC.SelectObject(wxNullBitmap);
 120 };
 121
 122
 123 void wxDC::DrawPoint( wxPoint& point )
 124 {
 125   DrawPoint( point.x, point.y );
 126 };
 127
 128 void wxDC::DrawPolygon( wxList *list, long xoffset, long yoffset, int fillStyle )
 129 {
 130   int n = list->Number();
 131   wxPoint *points = new wxPoint[n];
 132
 133   int i = 0;
 134   for( wxNode *node = list->First(); node; node = node->Next() )
 135   {
 136     wxPoint *point = (wxPoint *)node->Data();
 137     points[i].x = point->x;
 138     points[i++].y = point->y;
 139   };
 140   DrawPolygon( n, points, xoffset, yoffset, fillStyle );
 141   delete[] points;
 142 };
 143
 144 void wxDC::DrawLines( wxList *list, long xoffset, long yoffset )
 145 {
 146   int n = list->Number();
 147   wxPoint *points = new wxPoint[n];
 148
 149   int i = 0;
 150   for( wxNode *node = list->First(); node; node = node->Next() )
 151   {
 152     wxPoint *point = (wxPoint *)node->Data();
 153     points[i].x = point->x;
 154     points[i++].y = point->y;
 155   };
 156   DrawLines( n, points, xoffset, yoffset );
 157   delete []points;
 158 };
 159
 160 void wxDC::DrawSpline( long x1, long y1, long x2, long y2, long x3, long y3 )
 161 {
 162   wxList list;
 163   list.Append( (wxObject*)new wxPoint(x1, y1) );
 164   list.Append( (wxObject*)new wxPoint(x2, y2) );
 165   list.Append( (wxObject*)new wxPoint(x3, y3) );
 166   DrawSpline(&list);
 167   wxNode *node = list.First();
 168   while (node)
 169   {
 170     wxPoint *p = (wxPoint*)node->Data();
 171     delete p;
 172     node = node->Next();
 173   };
 174 };
 175
 176 void wxDC::DrawSpline( int n, wxPoint points[] )
 177 {
 178   wxList list;
 179   for (int i = 0; i < n; i++) list.Append( (wxObject*)&points[i] );
 180   DrawSpline( &list );
 181 };
 182
 183 void wxDC::SetClippingRegion( long x, long y, long width, long height )
 184 {
 185   m_clipping = TRUE;
 186   m_clipX1 = x;
 187   m_clipY1 = y;
 188   m_clipX2 = x + width;
 189   m_clipY2 = y + height;
 190 };
 191
 192 void wxDC::DestroyClippingRegion(void)
 193 {
 194   m_clipping = FALSE;
 195 };
 196
 197 void wxDC::GetClippingBox( long *x, long *y, long *width, long *height ) const
 198 {
 199   if (m_clipping)
 200   {
 201     if (x) *x = m_clipX1;
 202     if (y) *y = m_clipY1;
 203     if (width) *width = (m_clipX2 - m_clipX1);
 204     if (height) *height = (m_clipY2 - m_clipY1);
 205   }
 206   else
 207    *x = *y = *width = *height = 0;
 208 };
 209
 210 void wxDC::GetSize( int* width, int* height ) const
 211 {
 212   *width = m_maxX-m_minX;
 213   *height = m_maxY-m_minY;
 214 };
 215
 216 void wxDC::GetSizeMM( long* width, long* height ) const
 217 {
 218   int w = 0;
 219   int h = 0;
 220   GetSize( &w, &h );
 221   *width = long( double(w) / (m_scaleX*m_mm_to_pix_x) );
 222   *height = long( double(h) / (m_scaleY*m_mm_to_pix_y) );
 223 };
 224
 225 void wxDC::SetTextForeground( const wxColour &col )
 226 {
 227   if (!Ok()) return;
 228   m_textForegroundColour = col;
 229 };
 230
 231 void wxDC::SetTextBackground( const wxColour &col )
 232 {
 233   if (!Ok()) return;
 234   m_textBackgroundColour = col;
 235 };
 236
 237 void wxDC::SetMapMode( int mode )
 238 {
 239   switch (mode)
 240   {
 241     case MM_TWIPS:
 242       SetLogicalScale( twips2mm*m_mm_to_pix_x, twips2mm*m_mm_to_pix_y );
 243       break;
 244     case MM_POINTS:
 245       SetLogicalScale( pt2mm*m_mm_to_pix_x, pt2mm*m_mm_to_pix_y );
 246       break;
 247     case MM_METRIC:
 248       SetLogicalScale( m_mm_to_pix_x, m_mm_to_pix_y );
 249       break;
 250     case MM_LOMETRIC:
 251       SetLogicalScale( m_mm_to_pix_x/10.0, m_mm_to_pix_y/10.0 );
 252       break;
 253     default:
 254     case MM_TEXT:
 255       SetLogicalScale( 1.0, 1.0 );
 256       break;
 257   };
 258   if (mode != MM_TEXT)
 259   {
 260     m_needComputeScaleX = TRUE;
 261     m_needComputeScaleY = TRUE;
 262   };
 263 };
 264
 265 void wxDC::SetUserScale( double x, double y )
 266 {
 267   // allow negative ? -> no
 268   m_userScaleX = x;
 269   m_userScaleY = y;
 270   ComputeScaleAndOrigin();
 271 };
 272
 273 void wxDC::GetUserScale( double *x, double *y )
 274 {
 275   if (x) *x = m_userScaleX;
 276   if (y) *y = m_userScaleY;
 277 };
 278
 279 void wxDC::SetLogicalScale( double x, double y )
 280 {
 281   // allow negative ?
 282   m_logicalScaleX = x;
 283   m_logicalScaleY = y;
 284   ComputeScaleAndOrigin();
 285 };
 286
 287 void wxDC::GetLogicalScale( double *x, double *y )
 288 {
 289   if (x) *x = m_logicalScaleX;
 290   if (y) *y = m_logicalScaleY;
 291 };
 292
 293 void wxDC::SetLogicalOrigin( long x, long y )
 294 {
 295   m_logicalOriginX = x * m_signX;   // is this still correct ?
 296   m_logicalOriginY = y * m_signY;
 297   ComputeScaleAndOrigin();
 298 };
 299
 300 void wxDC::GetLogicalOrigin( long *x, long *y )
 301 {
 302   if (x) *x = m_logicalOriginX;
 303   if (y) *y = m_logicalOriginY;
 304 };
 305
 306 void wxDC::SetDeviceOrigin( long x, long y )
 307 {
 308   m_externalDeviceOriginX = x;
 309   m_externalDeviceOriginY = y;
 310   ComputeScaleAndOrigin();
 311 };
 312
 313 void wxDC::GetDeviceOrigin( long *x, long *y )
 314 {
 315 //  if (x) *x = m_externalDeviceOriginX;
 316 //  if (y) *y = m_externalDeviceOriginY;
 317   if (x) *x = m_deviceOriginX;
 318   if (y) *y = m_deviceOriginY;
 319 };
 320
 321 void wxDC::SetInternalDeviceOrigin( long x, long y )
 322 {
 323   m_internalDeviceOriginX = x;
 324   m_internalDeviceOriginY = y;
 325   ComputeScaleAndOrigin();
 326 };
 327
 328 void wxDC::GetInternalDeviceOrigin( long *x, long *y )
 329 {
 330   if (x) *x = m_internalDeviceOriginX;
 331   if (y) *y = m_internalDeviceOriginY;
 332 };
 333
 334 void wxDC::SetAxisOrientation( bool xLeftRight, bool yBottomUp )
 335 {
 336   m_signX = (xLeftRight ?  1 : -1);
 337   m_signY = (yBottomUp  ? -1 :  1);
 338   ComputeScaleAndOrigin();
 339 };
 340
 341 long wxDC::DeviceToLogicalX(long x) const
 342 {
 343   return XDEV2LOG(x);
 344 };
 345
 346 long wxDC::DeviceToLogicalY(long y) const
 347 {
 348   return YDEV2LOG(y);
 349 };
 350
 351 long wxDC::DeviceToLogicalXRel(long x) const
 352 {
 353   return XDEV2LOGREL(x);
 354 };
 355
 356 long wxDC::DeviceToLogicalYRel(long y) const
 357 {
 358   return YDEV2LOGREL(y);
 359 };
 360
 361 long wxDC::LogicalToDeviceX(long x) const
 362 {
 363   return XLOG2DEV(x);
 364 };
 365
 366 long wxDC::LogicalToDeviceY(long y) const
 367 {
 368   return YLOG2DEV(y);
 369 };
 370
 371 long wxDC::LogicalToDeviceXRel(long x) const
 372 {
 373   return XLOG2DEVREL(x);
 374 };
 375
 376 long wxDC::LogicalToDeviceYRel(long y) const
 377 {
 378   return YLOG2DEVREL(y);
 379 };
 380
 381 void wxDC::CalcBoundingBox( long x, long y )
 382 {
 383   if (x < m_minX) m_minX = x;
 384   if (y < m_minY) m_minY = y;
 385   if (x > m_maxX) m_maxX = x;
 386   if (y > m_maxY) m_maxY = y;
 387 };
 388
 389 void wxDC::ComputeScaleAndOrigin(void)
 390 {
 391   // CMB: copy scale to see if it changes
 392   double origScaleX = m_scaleX;
 393   double origScaleY = m_scaleY;
 394
 395   m_scaleX = m_logicalScaleX * m_userScaleX;
 396   m_scaleY = m_logicalScaleY * m_userScaleY;
 397
 398   m_deviceOriginX = m_internalDeviceOriginX + m_externalDeviceOriginX;
 399   m_deviceOriginY = m_internalDeviceOriginY + m_externalDeviceOriginY;
 400
 401   // CMB: if scale has changed call SetPen to recalulate the line width
 402   if (m_scaleX != origScaleX || m_scaleY != origScaleY)
 403   {
 404     // this is a bit artificial, but we need to force wxDC to think
 405     // the pen has changed
 406     wxPen* pen = & GetPen();
 407     wxPen tempPen;
 408     m_pen = tempPen;
 409     SetPen(* pen);
 410   }
 411 };
 412