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