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_backgroundMode = wxTRANSPARENT;
  32
  33     m_isInteractive = false;
  34 }
  35
  36 void wxDC::DoDrawIcon( const wxIcon &icon, wxCoord x, wxCoord y)
  37 {
  38     wxCHECK_RET( Ok(), "invalid dc" );
  39     wxCHECK_RET( icon.Ok(), "invalid icon" );
  40
  41     DoDrawBitmap(icon, x, y, true);
  42 }
  43
  44 void wxDC::DoDrawBitmap( const wxBitmap& bitmap, wxCoord x, wxCoord y, bool useMask )
  45 {
  46     wxCHECK_RET( bitmap.Ok(), "invalid bitmap" );
  47
  48     wxMemoryDC memDC;
  49     memDC.SelectObjectAsSource(bitmap);
  50
  51 #if 0
  52     // Not sure if we need this. The mask should leave the masked areas as per
  53     // the original background of this DC.
  54     if (useMask)
  55     {
  56         // There might be transparent areas, so make these the same colour as this
  57         // DC
  58         memDC.SetBackground(* GetBackground());
  59         memDC.Clear();
  60     }
  61 #endif // 0
  62
  63     Blit(x, y, bitmap.GetWidth(), bitmap.GetHeight(), &memDC, 0, 0, wxCOPY, useMask);
  64
  65     memDC.SelectObject(wxNullBitmap);
  66 }
  67
  68 void wxDC::DoSetClippingRegion( wxCoord x, wxCoord y, wxCoord width, wxCoord height )
  69 {
  70     m_clipping = true;
  71     m_clipX1 = x;
  72     m_clipY1 = y;
  73     m_clipX2 = x + width;
  74     m_clipY2 = y + height;
  75 }
  76
  77 void wxDC::DoGetSize( int* width, int* height ) const
  78 {
  79     if ( width )
  80         *width = m_maxX - m_minX;
  81     if ( height )
  82         *height = m_maxY - m_minY;
  83 }
  84
  85 void wxDC::DoGetSizeMM( int* width, int* height ) const
  86 {
  87     int w, h;
  88     GetSize( &w, &h );
  89
  90     if ( width )
  91         *width = int( double(w) / (m_scaleX*m_mm_to_pix_x) );
  92     if ( height )
  93         *height = int( double(h) / (m_scaleY*m_mm_to_pix_y) );
  94 }
  95
  96 // Resolution in pixels per logical inch
  97 wxSize wxDC::GetPPI() const
  98 {
  99     // TODO (should probably be pure virtual)
 100     return wxSize(0, 0);
 101 }