src/x11/dc.cpp

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