src/gtk/dcmemory.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        src/gtk/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         m_window = m_selected.GetPixmap();
  63
  64         m_selected.PurgeOtherRepresentations(wxBitmap::Pixmap);
  65
  66         m_isMemDC = true;
  67
  68         SetUpDC();
  69     }
  70     else
  71     {
  72         m_ok = false;
  73         m_window = (GdkWindow *) NULL;
  74     }
  75 }
  76
  77 void wxMemoryDC::SetPen( const wxPen& penOrig )
  78 {
  79     wxPen pen( penOrig );
  80     if ( m_selected.Ok() &&
  81             m_selected.GetDepth() == 1 &&
  82                 (pen != *wxTRANSPARENT_PEN) )
  83     {
  84         pen.SetColour( pen.GetColour() == *wxWHITE ? *wxBLACK : *wxWHITE );
  85     }
  86
  87     wxWindowDC::SetPen( pen );
  88 }
  89
  90 void wxMemoryDC::SetBrush( const wxBrush& brushOrig )
  91 {
  92     wxBrush brush( brushOrig );
  93     if ( m_selected.Ok() &&
  94             m_selected.GetDepth() == 1 &&
  95                 (brush != *wxTRANSPARENT_BRUSH) )
  96     {
  97         brush.SetColour( brush.GetColour() == *wxWHITE ? *wxBLACK : *wxWHITE);
  98     }
  99
 100     wxWindowDC::SetBrush( brush );
 101 }
 102
 103 void wxMemoryDC::SetBackground( const wxBrush& brushOrig )
 104 {
 105     wxBrush brush(brushOrig);
 106
 107     if ( m_selected.Ok() &&
 108             m_selected.GetDepth() == 1 &&
 109                 (brush != *wxTRANSPARENT_BRUSH) )
 110     {
 111         brush.SetColour( brush.GetColour() == *wxWHITE ? *wxBLACK : *wxWHITE );
 112     }
 113
 114     wxWindowDC::SetBackground( brush );
 115 }
 116
 117 void wxMemoryDC::SetTextForeground( const wxColour& col )
 118 {
 119     if ( m_selected.Ok() && m_selected.GetDepth() == 1 )
 120     {
 121         wxWindowDC::SetTextForeground( col == *wxWHITE ? *wxBLACK : *wxWHITE);
 122     }
 123     else
 124     {
 125         wxWindowDC::SetTextForeground( col );
 126     }
 127 }
 128
 129 void wxMemoryDC::SetTextBackground( const wxColour &col )
 130 {
 131     if (m_selected.Ok() && m_selected.GetDepth() == 1)
 132     {
 133         wxWindowDC::SetTextBackground( col == *wxWHITE ? *wxBLACK : *wxWHITE );
 134     }
 135     else
 136     {
 137         wxWindowDC::SetTextBackground( col );
 138     }
 139 }
 140
 141 void wxMemoryDC::DoGetSize( int *width, int *height ) const
 142 {
 143     if (m_selected.Ok())
 144     {
 145         if (width) (*width) = m_selected.GetWidth();
 146         if (height) (*height) = m_selected.GetHeight();
 147     }
 148     else
 149     {
 150         if (width) (*width) = 0;
 151         if (height) (*height) = 0;
 152     }
 153 }