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 #if defined(__GNUG__) && !defined(NO_GCC_PRAGMA)
  13     #pragma implementation "dc.h"
  14 #endif
  15
  16 // For compilers that support precompilation, includes "wx.h".
  17 #include "wx/wxprec.h"
  18
  19 #include "wx/dc.h"
  20 #include "wx/dcmemory.h"
  21 #include "wx/defs.h"
  22
  23     IMPLEMENT_ABSTRACT_CLASS(wxDC, wxObject)
  24
  25 //-----------------------------------------------------------------------------
  26 // wxDC
  27 //-----------------------------------------------------------------------------
  28
  29 wxDC::wxDC()
  30 {
  31     m_ok = false;
  32
  33     m_mm_to_pix_x = 1.0;
  34     m_mm_to_pix_y = 1.0;
  35
  36     m_backgroundMode = wxTRANSPARENT;
  37
  38     m_isInteractive = false;
  39 }
  40
  41 void wxDC::DoDrawIcon( const wxIcon &icon, wxCoord x, wxCoord y)
  42 {
  43     wxCHECK_RET( Ok(), "invalid dc" );
  44     wxCHECK_RET( icon.Ok(), "invalid icon" );
  45
  46     DoDrawBitmap(icon, x, y, true);
  47 }
  48
  49 void wxDC::DoDrawBitmap( const wxBitmap& bitmap, wxCoord x, wxCoord y, bool useMask )
  50 {
  51     wxCHECK_RET( bitmap.Ok(), "invalid bitmap" );
  52
  53     wxMemoryDC memDC;
  54     memDC.SelectObject(bitmap);
  55
  56 #if 0
  57     // Not sure if we need this. The mask should leave the masked areas as per
  58     // the original background of this DC.
  59     if (useMask)
  60     {
  61         // There might be transparent areas, so make these the same colour as this
  62         // DC
  63         memDC.SetBackground(* GetBackground());
  64         memDC.Clear();
  65     }
  66 #endif // 0
  67
  68     Blit(x, y, bitmap.GetWidth(), bitmap.GetHeight(), &memDC, 0, 0, wxCOPY, useMask);
  69
  70     memDC.SelectObject(wxNullBitmap);
  71 }
  72
  73 void wxDC::DoSetClippingRegion( wxCoord x, wxCoord y, wxCoord width, wxCoord height )
  74 {
  75     m_clipping = true;
  76     m_clipX1 = x;
  77     m_clipY1 = y;
  78     m_clipX2 = x + width;
  79     m_clipY2 = y + height;
  80 }
  81
  82 void wxDC::DoGetSize( int* width, int* height ) const
  83 {
  84     if ( width )
  85         *width = m_maxX - m_minX;
  86     if ( height )
  87         *height = m_maxY - m_minY;
  88 }
  89
  90 void wxDC::DoGetSizeMM( int* width, int* height ) const
  91 {
  92     int w, h;
  93     GetSize( &w, &h );
  94
  95     if ( width )
  96         *width = int( double(w) / (m_scaleX*m_mm_to_pix_x) );
  97     if ( height )
  98         *height = int( double(h) / (m_scaleY*m_mm_to_pix_y) );
  99 }
 100
 101 // Resolution in pixels per logical inch
 102 wxSize wxDC::GetPPI() const
 103 {
 104     // TODO (should probably be pure virtual)
 105     return wxSize(0, 0);
 106 }
 107
 108 void wxDC::SetMapMode( int mode )
 109 {
 110     switch (mode)
 111     {
 112     case wxMM_TWIPS:
 113         SetLogicalScale( twips2mm*m_mm_to_pix_x, twips2mm*m_mm_to_pix_y );
 114         break;
 115     case wxMM_POINTS:
 116         SetLogicalScale( pt2mm*m_mm_to_pix_x, pt2mm*m_mm_to_pix_y );
 117         break;
 118     case wxMM_METRIC:
 119         SetLogicalScale( m_mm_to_pix_x, m_mm_to_pix_y );
 120         break;
 121     case wxMM_LOMETRIC:
 122         SetLogicalScale( m_mm_to_pix_x/10.0, m_mm_to_pix_y/10.0 );
 123         break;
 124     default:
 125     case wxMM_TEXT:
 126         SetLogicalScale( 1.0, 1.0 );
 127         break;
 128     }
 129     if (mode != wxMM_TEXT)
 130     {
 131         m_needComputeScaleX = true;
 132         m_needComputeScaleY = true;
 133     }
 134 }
 135
 136 void wxDC::SetUserScale( double x, double y )
 137 {
 138     // allow negative ? -> no
 139     m_userScaleX = x;
 140     m_userScaleY = y;
 141     ComputeScaleAndOrigin();
 142 }
 143
 144 void wxDC::SetLogicalScale( double x, double y )
 145 {
 146     // allow negative ?
 147     m_logicalScaleX = x;
 148     m_logicalScaleY = y;
 149     ComputeScaleAndOrigin();
 150 }
 151
 152 void wxDC::SetLogicalOrigin( wxCoord x, wxCoord y )
 153 {
 154     m_logicalOriginX = x * m_signX;   // is this still correct ?
 155     m_logicalOriginY = y * m_signY;
 156     ComputeScaleAndOrigin();
 157 }
 158
 159 void wxDC::SetDeviceOrigin( wxCoord x, wxCoord y )
 160 {
 161     // only wxPostScripDC has m_signX = -1, we override SetDeviceOrigin there
 162     m_deviceOriginX = x;
 163     m_deviceOriginY = y;
 164     ComputeScaleAndOrigin();
 165 }
 166
 167 void wxDC::SetAxisOrientation( bool xLeftRight, bool yBottomUp )
 168 {
 169     m_signX = xLeftRight ?  1 : -1;
 170     m_signY = yBottomUp  ? -1 :  1;
 171     ComputeScaleAndOrigin();
 172 }
 173
 174 wxCoord wxDCBase::DeviceToLogicalX(wxCoord x) const
 175 {
 176   return ((wxDC *)this)->XDEV2LOG(x);
 177 }
 178
 179 wxCoord wxDCBase::DeviceToLogicalY(wxCoord y) const
 180 {
 181   return ((wxDC *)this)->YDEV2LOG(y);
 182 }
 183
 184 wxCoord wxDCBase::DeviceToLogicalXRel(wxCoord x) const
 185 {
 186   return ((wxDC *)this)->XDEV2LOGREL(x);
 187 }
 188
 189 wxCoord wxDCBase::DeviceToLogicalYRel(wxCoord y) const
 190 {
 191   return ((wxDC *)this)->YDEV2LOGREL(y);
 192 }
 193
 194 wxCoord wxDCBase::LogicalToDeviceX(wxCoord x) const
 195 {
 196   return ((wxDC *)this)->XLOG2DEV(x);
 197 }
 198
 199 wxCoord wxDCBase::LogicalToDeviceY(wxCoord y) const
 200 {
 201   return ((wxDC *)this)->YLOG2DEV(y);
 202 }
 203
 204 wxCoord wxDCBase::LogicalToDeviceXRel(wxCoord x) const
 205 {
 206   return ((wxDC *)this)->XLOG2DEVREL(x);
 207 }
 208
 209 wxCoord wxDCBase::LogicalToDeviceYRel(wxCoord y) const
 210 {
 211   return ((wxDC *)this)->YLOG2DEVREL(y);
 212 }
 213
 214 void wxDC::ComputeScaleAndOrigin()
 215 {
 216     m_scaleX = m_logicalScaleX * m_userScaleX;
 217     m_scaleY = m_logicalScaleY * m_userScaleY;
 218 }
 219