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 // For compilers that support precompilation, includes "wx.h".
  11 #include "wx/wxprec.h"
  12
  13 #include "wx/dcmemory.h"
  14
  15 #include <gdk/gdk.h>
  16 #include <gtk/gtk.h>
  17
  18 //-----------------------------------------------------------------------------
  19 // wxMemoryDC
  20 //-----------------------------------------------------------------------------
  21
  22 IMPLEMENT_DYNAMIC_CLASS(wxMemoryDC,wxWindowDC)
  23
  24 wxMemoryDC::wxMemoryDC() : wxWindowDC()
  25 {
  26     m_ok = FALSE;
  27
  28     m_cmap = gtk_widget_get_default_colormap();
  29
  30     m_context = gdk_pango_context_get();
  31     // Note: The Sun customised version of Pango shipping with Solaris 10
  32     // crashes if the language is left NULL (see bug 1374114)
  33     pango_context_set_language( m_context, gtk_get_default_language() );
  34     m_layout = pango_layout_new( m_context );
  35     m_fontdesc = pango_font_description_copy( pango_context_get_font_description( m_context ) );
  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     m_context = gdk_pango_context_get();
  46     pango_context_set_language( m_context, gtk_get_default_language() );
  47     m_layout = pango_layout_new( m_context );
  48     m_fontdesc = pango_font_description_copy( pango_context_get_font_description( m_context ) );
  49 }
  50
  51 wxMemoryDC::~wxMemoryDC()
  52 {
  53     g_object_unref(m_context);
  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_selected.PurgeOtherRepresentations(wxBitmap::Pixmap);
  72
  73         m_isMemDC = TRUE;
  74
  75         SetUpDC();
  76     }
  77     else
  78     {
  79         m_ok = FALSE;
  80         m_window = (GdkWindow *) NULL;
  81     }
  82 }
  83
  84 void wxMemoryDC::SetPen( const wxPen& penOrig )
  85 {
  86     wxPen pen( penOrig );
  87     if ( m_selected.Ok() &&
  88             m_selected.GetBitmap() &&
  89                 (pen != *wxTRANSPARENT_PEN) )
  90     {
  91         pen.SetColour( pen.GetColour() == *wxWHITE ? *wxBLACK : *wxWHITE );
  92     }
  93
  94     wxWindowDC::SetPen( pen );
  95 }
  96
  97 void wxMemoryDC::SetBrush( const wxBrush& brushOrig )
  98 {
  99     wxBrush brush( brushOrig );
 100     if ( m_selected.Ok() &&
 101             m_selected.GetBitmap() &&
 102                 (brush != *wxTRANSPARENT_BRUSH) )
 103     {
 104         brush.SetColour( brush.GetColour() == *wxWHITE ? *wxBLACK : *wxWHITE);
 105     }
 106
 107     wxWindowDC::SetBrush( brush );
 108 }
 109
 110 void wxMemoryDC::SetBackground( const wxBrush& brushOrig )
 111 {
 112     wxBrush brush(brushOrig);
 113
 114     if ( m_selected.Ok() &&
 115             m_selected.GetBitmap() &&
 116                 (brush != *wxTRANSPARENT_BRUSH) )
 117     {
 118         brush.SetColour( brush.GetColour() == *wxWHITE ? *wxBLACK : *wxWHITE );
 119     }
 120
 121     wxWindowDC::SetBackground( brush );
 122 }
 123
 124 void wxMemoryDC::SetTextForeground( const wxColour& col )
 125 {
 126     if ( m_selected.Ok() && m_selected.GetBitmap() )
 127     {
 128         wxWindowDC::SetTextForeground( col == *wxWHITE ? *wxBLACK : *wxWHITE);
 129     }
 130     else
 131     {
 132         wxWindowDC::SetTextForeground( col );
 133     }
 134 }
 135
 136 void wxMemoryDC::SetTextBackground( const wxColour &col )
 137 {
 138     if (m_selected.Ok() && m_selected.GetBitmap())
 139     {
 140         wxWindowDC::SetTextBackground( col == *wxWHITE ? *wxBLACK : *wxWHITE );
 141     }
 142     else
 143     {
 144         wxWindowDC::SetTextBackground( col );
 145     }
 146 }
 147
 148 void wxMemoryDC::DoGetSize( int *width, int *height ) const
 149 {
 150     if (m_selected.Ok())
 151     {
 152         if (width) (*width) = m_selected.GetWidth();
 153         if (height) (*height) = m_selected.GetHeight();
 154     }
 155     else
 156     {
 157         if (width) (*width) = 0;
 158         if (height) (*height) = 0;
 159     }
 160 }
 161
 162