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( const wxBitmap& bitmap )
  25    : wxWindowDC()
  26 {
  27     m_ok = false;
  28
  29     m_cmap = gtk_widget_get_default_colormap();
  30
  31     m_context = gdk_pango_context_get();
  32     // Note: The Sun customised version of Pango shipping with Solaris 10
  33     // crashes if the language is left NULL (see bug 1374114)
  34     pango_context_set_language( m_context, gtk_get_default_language() );
  35     m_layout = pango_layout_new( m_context );
  36     m_fontdesc = pango_font_description_copy( pango_context_get_font_description( m_context ) );
  37
  38     if ( bitmap.IsOk() )
  39         SelectObject(bitmap);
  40 }
  41
  42 wxMemoryDC::wxMemoryDC( wxDC *WXUNUSED(dc) )
  43   : wxWindowDC()
  44 {
  45     m_ok = false;
  46
  47     m_cmap = gtk_widget_get_default_colormap();
  48
  49     m_context = gdk_pango_context_get();
  50     pango_context_set_language( m_context, gtk_get_default_language() );
  51     m_layout = pango_layout_new( m_context );
  52     m_fontdesc = pango_font_description_copy( pango_context_get_font_description( m_context ) );
  53 }
  54
  55 wxMemoryDC::~wxMemoryDC()
  56 {
  57     g_object_unref(m_context);
  58 }
  59
  60 void wxMemoryDC::SelectObject( const wxBitmap& bitmap )
  61 {
  62     Destroy();
  63     m_selected = bitmap;
  64     if (m_selected.Ok())
  65     {
  66         m_window = m_selected.GetPixmap();
  67
  68         m_selected.PurgeOtherRepresentations(wxBitmap::Pixmap);
  69
  70         m_isMemDC = true;
  71
  72         SetUpDC();
  73     }
  74     else
  75     {
  76         m_ok = false;
  77         m_window = (GdkWindow *) NULL;
  78     }
  79 }
  80
  81 void wxMemoryDC::SetPen( const wxPen& penOrig )
  82 {
  83     wxPen pen( penOrig );
  84     if ( m_selected.Ok() &&
  85             m_selected.GetDepth() == 1 &&
  86                 (pen != *wxTRANSPARENT_PEN) )
  87     {
  88         pen.SetColour( pen.GetColour() == *wxWHITE ? *wxBLACK : *wxWHITE );
  89     }
  90
  91     wxWindowDC::SetPen( pen );
  92 }
  93
  94 void wxMemoryDC::SetBrush( const wxBrush& brushOrig )
  95 {
  96     wxBrush brush( brushOrig );
  97     if ( m_selected.Ok() &&
  98             m_selected.GetDepth() == 1 &&
  99                 (brush != *wxTRANSPARENT_BRUSH) )
 100     {
 101         brush.SetColour( brush.GetColour() == *wxWHITE ? *wxBLACK : *wxWHITE);
 102     }
 103
 104     wxWindowDC::SetBrush( brush );
 105 }
 106
 107 void wxMemoryDC::SetBackground( const wxBrush& brushOrig )
 108 {
 109     wxBrush brush(brushOrig);
 110
 111     if ( m_selected.Ok() &&
 112             m_selected.GetDepth() == 1 &&
 113                 (brush != *wxTRANSPARENT_BRUSH) )
 114     {
 115         brush.SetColour( brush.GetColour() == *wxWHITE ? *wxBLACK : *wxWHITE );
 116     }
 117
 118     wxWindowDC::SetBackground( brush );
 119 }
 120
 121 void wxMemoryDC::SetTextForeground( const wxColour& col )
 122 {
 123     if ( m_selected.Ok() && m_selected.GetDepth() == 1 )
 124     {
 125         wxWindowDC::SetTextForeground( col == *wxWHITE ? *wxBLACK : *wxWHITE);
 126     }
 127     else
 128     {
 129         wxWindowDC::SetTextForeground( col );
 130     }
 131 }
 132
 133 void wxMemoryDC::SetTextBackground( const wxColour &col )
 134 {
 135     if (m_selected.Ok() && m_selected.GetDepth() == 1)
 136     {
 137         wxWindowDC::SetTextBackground( col == *wxWHITE ? *wxBLACK : *wxWHITE );
 138     }
 139     else
 140     {
 141         wxWindowDC::SetTextBackground( col );
 142     }
 143 }
 144
 145 void wxMemoryDC::DoGetSize( int *width, int *height ) const
 146 {
 147     if (m_selected.Ok())
 148     {
 149         if (width) (*width) = m_selected.GetWidth();
 150         if (height) (*height) = m_selected.GetHeight();
 151     }
 152     else
 153     {
 154         if (width) (*width) = 0;
 155         if (height) (*height) = 0;
 156     }
 157 }