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