src/motif/dc.cpp

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