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