src/x11/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 #if defined(__GNUG__) && !defined(NO_GCC_PRAGMA)
  13     #pragma implementation "dc.h"
  14 #endif
  15
  16 #include "wx/dc.h"
  17 #include "wx/dcmemory.h"
  18 #include "wx/defs.h"
  19
  20 IMPLEMENT_ABSTRACT_CLASS(wxDC, wxObject)
  21
  22 //-----------------------------------------------------------------------------
  23 // wxDC
  24 //-----------------------------------------------------------------------------
  25
  26 wxDC::wxDC()
  27 {
  28     m_ok = FALSE;
  29
  30 #if 1
  31     m_mm_to_pix_x = 1.0;
  32     m_mm_to_pix_y = 1.0;
  33 #else
  34     m_mm_to_pix_x = (double)wxGetDisplaySize().GetWidth() /
  35                     (double)wxGetDisplaySizeMM().GetWidth();
  36     m_mm_to_pix_y = (double)wxGetDisplaySize().GetHeight() /
  37                     (double)wxGetDisplaySizeMM().GetHeight();
  38 #endif
  39
  40     m_needComputeScaleX = FALSE; /* not used yet */
  41     m_needComputeScaleY = FALSE; /* not used yet */
  42
  43     m_logicalFunction = wxCOPY;
  44
  45     m_pen = *wxBLACK_PEN;
  46     m_font = *wxNORMAL_FONT;
  47     m_brush = *wxWHITE_BRUSH;
  48
  49     m_backgroundMode = wxTRANSPARENT;
  50
  51     m_isInteractive = FALSE;  // ???
  52 }
  53
  54 void wxDC::DoSetClippingRegion( wxCoord x, wxCoord y, wxCoord width, wxCoord height )
  55 {
  56     m_clipping = TRUE;
  57     m_clipX1 = x;
  58     m_clipY1 = y;
  59     m_clipX2 = x + width;
  60     m_clipY2 = y + height;
  61 }
  62
  63 void wxDC::DoGetSizeMM( int* width, int* height ) const
  64 {
  65     int w, h;
  66     GetSize( &w, &h );
  67
  68     if ( width )
  69         *width = int( double(w) / (m_scaleX*m_mm_to_pix_x) );
  70     if ( height )
  71         *height = int( double(h) / (m_scaleY*m_mm_to_pix_y) );
  72 }
  73
  74 // Resolution in pixels per logical inch
  75 wxSize wxDC::GetPPI() const
  76 {
  77     // TODO (should probably be pure virtual)
  78     return wxSize(0, 0);
  79 }
  80
  81 void wxDC::SetMapMode( int mode )
  82 {
  83     switch (mode)
  84     {
  85     case wxMM_TWIPS:
  86         SetLogicalScale( twips2mm*m_mm_to_pix_x, twips2mm*m_mm_to_pix_y );
  87         break;
  88     case wxMM_POINTS:
  89         SetLogicalScale( pt2mm*m_mm_to_pix_x, pt2mm*m_mm_to_pix_y );
  90         break;
  91     case wxMM_METRIC:
  92         SetLogicalScale( m_mm_to_pix_x, m_mm_to_pix_y );
  93         break;
  94     case wxMM_LOMETRIC:
  95         SetLogicalScale( m_mm_to_pix_x/10.0, m_mm_to_pix_y/10.0 );
  96         break;
  97     default:
  98     case wxMM_TEXT:
  99         SetLogicalScale( 1.0, 1.0 );
 100         break;
 101     }
 102     if (mode != wxMM_TEXT)
 103     {
 104         m_needComputeScaleX = TRUE;
 105         m_needComputeScaleY = TRUE;
 106     }
 107 }
 108
 109 void wxDC::SetUserScale( double x, double y )
 110 {
 111     // allow negative ? -> no
 112     m_userScaleX = x;
 113     m_userScaleY = y;
 114     ComputeScaleAndOrigin();
 115 }
 116
 117 void wxDC::SetLogicalScale( double x, double y )
 118 {
 119     // allow negative ?
 120     m_logicalScaleX = x;
 121     m_logicalScaleY = y;
 122     ComputeScaleAndOrigin();
 123 }
 124
 125 void wxDC::SetLogicalOrigin( wxCoord x, wxCoord y )
 126 {
 127     m_logicalOriginX = x * m_signX;   // is this still correct ?
 128     m_logicalOriginY = y * m_signY;
 129     ComputeScaleAndOrigin();
 130 }
 131
 132 void wxDC::SetDeviceOrigin( wxCoord x, wxCoord y )
 133 {
 134     // only wxPostScripDC has m_signX = -1, we override SetDeviceOrigin there
 135     m_deviceOriginX = x;
 136     m_deviceOriginY = y;
 137     ComputeScaleAndOrigin();
 138 }
 139
 140 void wxDC::SetAxisOrientation( bool xLeftRight, bool yBottomUp )
 141 {
 142     m_signX = xLeftRight ?  1 : -1;
 143     m_signY = yBottomUp  ? -1 :  1;
 144     ComputeScaleAndOrigin();
 145 }
 146
 147 wxCoord wxDCBase::DeviceToLogicalX(wxCoord x) const
 148 {
 149   return ((wxDC *)this)->XDEV2LOG(x);
 150 }
 151
 152 wxCoord wxDCBase::DeviceToLogicalY(wxCoord y) const
 153 {
 154   return ((wxDC *)this)->YDEV2LOG(y);
 155 }
 156
 157 wxCoord wxDCBase::DeviceToLogicalXRel(wxCoord x) const
 158 {
 159   return ((wxDC *)this)->XDEV2LOGREL(x);
 160 }
 161
 162 wxCoord wxDCBase::DeviceToLogicalYRel(wxCoord y) const
 163 {
 164   return ((wxDC *)this)->YDEV2LOGREL(y);
 165 }
 166
 167 wxCoord wxDCBase::LogicalToDeviceX(wxCoord x) const
 168 {
 169   return ((wxDC *)this)->XLOG2DEV(x);
 170 }
 171
 172 wxCoord wxDCBase::LogicalToDeviceY(wxCoord y) const
 173 {
 174   return ((wxDC *)this)->YLOG2DEV(y);
 175 }
 176
 177 wxCoord wxDCBase::LogicalToDeviceXRel(wxCoord x) const
 178 {
 179   return ((wxDC *)this)->XLOG2DEVREL(x);
 180 }
 181
 182 wxCoord wxDCBase::LogicalToDeviceYRel(wxCoord y) const
 183 {
 184   return ((wxDC *)this)->YLOG2DEVREL(y);
 185 }
 186
 187 void wxDC::ComputeScaleAndOrigin()
 188 {
 189     m_scaleX = m_logicalScaleX * m_userScaleX;
 190     m_scaleY = m_logicalScaleY * m_userScaleY;
 191 }
 192