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