src/gtk/dcmemory.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        dcmemory.cpp
   3 // Purpose:
   4 // Author:      Robert Roebling
   5 // RCS-ID:      $Id$
   6 // Copyright:   (c) 1998 Robert Roebling
   7 // Licence:     wxWindows licence
   8 /////////////////////////////////////////////////////////////////////////////
   9
  10 #ifdef __GNUG__
  11 #pragma implementation "dcmemory.h"
  12 #endif
  13
  14 #include "wx/dcmemory.h"
  15
  16 #include <gdk/gdk.h>
  17 #include <gtk/gtk.h>
  18
  19 //-----------------------------------------------------------------------------
  20 // wxMemoryDC
  21 //-----------------------------------------------------------------------------
  22
  23 IMPLEMENT_DYNAMIC_CLASS(wxMemoryDC,wxWindowDC)
  24
  25 wxMemoryDC::wxMemoryDC() : wxWindowDC()
  26 {
  27     m_ok = FALSE;
  28
  29     m_cmap = gtk_widget_get_default_colormap();
  30
  31 #ifdef __WXGTK20__
  32     m_context = gdk_pango_context_get();
  33     m_layout = pango_layout_new( m_context );
  34     m_fontdesc = pango_font_description_copy( pango_context_get_font_description( m_context ) );
  35 #endif
  36 }
  37
  38 wxMemoryDC::wxMemoryDC( wxDC *WXUNUSED(dc) )
  39   : wxWindowDC()
  40 {
  41     m_ok = FALSE;
  42
  43     m_cmap = gtk_widget_get_default_colormap();
  44
  45 #ifdef __WXGTK20__
  46     m_context = gdk_pango_context_get();
  47     m_layout = pango_layout_new( m_context );
  48     m_fontdesc = pango_font_description_copy( pango_context_get_font_description( m_context ) );
  49 #endif
  50 }
  51
  52 wxMemoryDC::~wxMemoryDC()
  53 {
  54 }
  55
  56 void wxMemoryDC::SelectObject( const wxBitmap& bitmap )
  57 {
  58     Destroy();
  59     m_selected = bitmap;
  60     if (m_selected.Ok())
  61     {
  62         if (m_selected.GetPixmap())
  63         {
  64             m_window = m_selected.GetPixmap();
  65         }
  66         else
  67         {
  68             m_window = m_selected.GetBitmap();
  69         }
  70
  71         m_isMemDC = TRUE;
  72
  73         SetUpDC();
  74     }
  75     else
  76     {
  77         m_ok = FALSE;
  78         m_window = (GdkWindow *) NULL;
  79     }
  80 }
  81
  82 void wxMemoryDC::SetPen( const wxPen &pen )
  83 {
  84     if (m_selected.Ok() && m_selected.GetBitmap() && (*wxTRANSPARENT_PEN != pen))
  85     {
  86         if (*wxWHITE_PEN == pen)
  87             wxWindowDC::SetPen( *wxBLACK_PEN );
  88         else
  89             wxWindowDC::SetPen( *wxWHITE_PEN );
  90     }
  91     else
  92     {
  93         wxWindowDC::SetPen( pen );
  94     }
  95 }
  96
  97 void wxMemoryDC::SetBrush( const wxBrush &brush )
  98 {
  99     if (m_selected.Ok() && m_selected.GetBitmap() && (*wxTRANSPARENT_BRUSH != brush))
 100     {
 101         if (*wxWHITE_BRUSH == brush)
 102             wxWindowDC::SetBrush( *wxBLACK_BRUSH );
 103         else
 104             wxWindowDC::SetBrush( *wxWHITE_BRUSH );
 105     }
 106     else
 107     {
 108         wxWindowDC::SetBrush( brush );
 109     }
 110 }
 111
 112 void wxMemoryDC::SetTextForeground( const wxColour &col )
 113 {
 114     if (m_selected.Ok() && m_selected.GetBitmap())
 115     {
 116         if (col == *wxWHITE)
 117             wxWindowDC::SetTextForeground( *wxBLACK );
 118         else
 119             wxWindowDC::SetTextForeground( *wxWHITE );
 120     }
 121     else
 122     {
 123         wxWindowDC::SetTextForeground( col );
 124     }
 125 }
 126
 127 void wxMemoryDC::SetTextBackground( const wxColour &col )
 128 {
 129     if (m_selected.Ok() && m_selected.GetBitmap())
 130     {
 131         if (col == *wxWHITE)
 132             wxWindowDC::SetTextBackground( *wxBLACK );
 133         else
 134             wxWindowDC::SetTextBackground( *wxWHITE );
 135     }
 136     else
 137     {
 138         wxWindowDC::SetTextBackground( col );
 139     }
 140 }
 141
 142 void wxMemoryDC::DoGetSize( int *width, int *height ) const
 143 {
 144     if (m_selected.Ok())
 145     {
 146         if (width) (*width) = m_selected.GetWidth();
 147         if (height) (*height) = m_selected.GetHeight();
 148     }
 149     else
 150     {
 151         if (width) (*width) = 0;
 152         if (height) (*height) = 0;
 153     }
 154 }
 155
 156