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 void wxMemoryDC::Init()
  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     Init();
  42 }
  43
  44 wxMemoryDC::~wxMemoryDC()
  45 {
  46     g_object_unref(m_context);
  47 }
  48
  49 void wxMemoryDC::DoSelect( const wxBitmap& bitmap )
  50 {
  51     Destroy();
  52
  53     m_selected = bitmap;
  54     if (m_selected.Ok())
  55     {
  56         m_window = m_selected.GetPixmap();
  57
  58         m_selected.PurgeOtherRepresentations(wxBitmap::Pixmap);
  59
  60         m_isMemDC = true;
  61
  62         SetUpDC();
  63     }
  64     else
  65     {
  66         m_ok = false;
  67         m_window = (GdkWindow *) NULL;
  68     }
  69 }
  70
  71 void wxMemoryDC::SetPen( const wxPen& penOrig )
  72 {
  73     wxPen pen( penOrig );
  74     if ( m_selected.Ok() &&
  75             m_selected.GetDepth() == 1 &&
  76                 (pen != *wxTRANSPARENT_PEN) )
  77     {
  78         pen.SetColour( pen.GetColour() == *wxWHITE ? *wxBLACK : *wxWHITE );
  79     }
  80
  81     wxWindowDC::SetPen( pen );
  82 }
  83
  84 void wxMemoryDC::SetBrush( const wxBrush& brushOrig )
  85 {
  86     wxBrush brush( brushOrig );
  87     if ( m_selected.Ok() &&
  88             m_selected.GetDepth() == 1 &&
  89                 (brush != *wxTRANSPARENT_BRUSH) )
  90     {
  91         brush.SetColour( brush.GetColour() == *wxWHITE ? *wxBLACK : *wxWHITE);
  92     }
  93
  94     wxWindowDC::SetBrush( brush );
  95 }
  96
  97 void wxMemoryDC::SetBackground( const wxBrush& brushOrig )
  98 {
  99     wxBrush brush(brushOrig);
 100
 101     if ( m_selected.Ok() &&
 102             m_selected.GetDepth() == 1 &&
 103                 (brush != *wxTRANSPARENT_BRUSH) )
 104     {
 105         brush.SetColour( brush.GetColour() == *wxWHITE ? *wxBLACK : *wxWHITE );
 106     }
 107
 108     wxWindowDC::SetBackground( brush );
 109 }
 110
 111 void wxMemoryDC::SetTextForeground( const wxColour& col )
 112 {
 113     if ( m_selected.Ok() && m_selected.GetDepth() == 1 )
 114     {
 115         wxWindowDC::SetTextForeground( col == *wxWHITE ? *wxBLACK : *wxWHITE);
 116     }
 117     else
 118     {
 119         wxWindowDC::SetTextForeground( col );
 120     }
 121 }
 122
 123 void wxMemoryDC::SetTextBackground( const wxColour &col )
 124 {
 125     if (m_selected.Ok() && m_selected.GetDepth() == 1)
 126     {
 127         wxWindowDC::SetTextBackground( col == *wxWHITE ? *wxBLACK : *wxWHITE );
 128     }
 129     else
 130     {
 131         wxWindowDC::SetTextBackground( col );
 132     }
 133 }
 134
 135 void wxMemoryDC::DoGetSize( int *width, int *height ) const
 136 {
 137     if (m_selected.Ok())
 138     {
 139         if (width) (*width) = m_selected.GetWidth();
 140         if (height) (*height) = m_selected.GetHeight();
 141     }
 142     else
 143     {
 144         if (width) (*width) = 0;
 145         if (height) (*height) = 0;
 146     }
 147 }