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 #ifdef __WXGTK20__
  31     m_context = gdk_pango_context_get();
  32     pango_context_set_language( m_context, gtk_get_default_language() );
  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     pango_context_set_language( m_context, gtk_get_default_language() );
  48     m_layout = pango_layout_new( m_context );
  49     m_fontdesc = pango_font_description_copy( pango_context_get_font_description( m_context ) );
  50 #endif
  51 }
  52
  53 wxMemoryDC::~wxMemoryDC()
  54 {
  55 #ifdef __WXGTK20__
  56     g_object_unref(m_context);
  57 #endif
  58 }
  59
  60 void wxMemoryDC::SelectObject( const wxBitmap& bitmap )
  61 {
  62     Destroy();
  63     m_selected = bitmap;
  64     if (m_selected.Ok())
  65     {
  66         if (m_selected.GetPixmap())
  67         {
  68             m_window = m_selected.GetPixmap();
  69         }
  70         else
  71         {
  72             m_window = m_selected.GetBitmap();
  73         }
  74
  75 #ifdef __WXGTK20__
  76         m_selected.PurgeOtherRepresentations(wxBitmap::Pixmap);
  77 #endif
  78
  79         m_isMemDC = TRUE;
  80
  81         SetUpDC();
  82     }
  83     else
  84     {
  85         m_ok = FALSE;
  86         m_window = (GdkWindow *) NULL;
  87     }
  88 }
  89
  90 void wxMemoryDC::SetPen( const wxPen& penOrig )
  91 {
  92     wxPen pen( penOrig );
  93     if ( m_selected.Ok() &&
  94             m_selected.GetBitmap() &&
  95                 (pen != *wxTRANSPARENT_PEN) )
  96     {
  97         pen.SetColour( pen.GetColour() == *wxWHITE ? *wxBLACK : *wxWHITE );
  98     }
  99
 100     wxWindowDC::SetPen( pen );
 101 }
 102
 103 void wxMemoryDC::SetBrush( const wxBrush& brushOrig )
 104 {
 105     wxBrush brush( brushOrig );
 106     if ( m_selected.Ok() &&
 107             m_selected.GetBitmap() &&
 108                 (brush != *wxTRANSPARENT_BRUSH) )
 109     {
 110         brush.SetColour( brush.GetColour() == *wxWHITE ? *wxBLACK : *wxWHITE);
 111     }
 112
 113     wxWindowDC::SetBrush( brush );
 114 }
 115
 116 void wxMemoryDC::SetBackground( const wxBrush& brushOrig )
 117 {
 118     wxBrush brush(brushOrig);
 119
 120     if ( m_selected.Ok() &&
 121             m_selected.GetBitmap() &&
 122                 (brush != *wxTRANSPARENT_BRUSH) )
 123     {
 124         brush.SetColour( brush.GetColour() == *wxWHITE ? *wxBLACK : *wxWHITE );
 125     }
 126
 127     wxWindowDC::SetBackground( brush );
 128 }
 129
 130 void wxMemoryDC::SetTextForeground( const wxColour& col )
 131 {
 132     if ( m_selected.Ok() && m_selected.GetBitmap() )
 133     {
 134         wxWindowDC::SetTextForeground( col == *wxWHITE ? *wxBLACK : *wxWHITE);
 135     }
 136     else
 137     {
 138         wxWindowDC::SetTextForeground( col );
 139     }
 140 }
 141
 142 void wxMemoryDC::SetTextBackground( const wxColour &col )
 143 {
 144     if (m_selected.Ok() && m_selected.GetBitmap())
 145     {
 146         wxWindowDC::SetTextBackground( col == *wxWHITE ? *wxBLACK : *wxWHITE );
 147     }
 148     else
 149     {
 150         wxWindowDC::SetTextBackground( col );
 151     }
 152 }
 153
 154 void wxMemoryDC::DoGetSize( int *width, int *height ) const
 155 {
 156     if (m_selected.Ok())
 157     {
 158         if (width) (*width) = m_selected.GetWidth();
 159         if (height) (*height) = m_selected.GetHeight();
 160     }
 161     else
 162     {
 163         if (width) (*width) = 0;
 164         if (height) (*height) = 0;
 165     }
 166 }
 167
 168