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     m_layout = pango_layout_new( m_context );
  33     m_fontdesc = pango_font_description_copy( pango_context_get_font_description( m_context ) );
  34 #endif
  35 }
  36
  37 wxMemoryDC::wxMemoryDC( wxDC *WXUNUSED(dc) )
  38   : wxWindowDC()
  39 {
  40     m_ok = FALSE;
  41
  42     m_cmap = gtk_widget_get_default_colormap();
  43
  44 #ifdef __WXGTK20__
  45     m_context = gdk_pango_context_get();
  46     m_layout = pango_layout_new( m_context );
  47     m_fontdesc = pango_font_description_copy( pango_context_get_font_description( m_context ) );
  48 #endif
  49 }
  50
  51 wxMemoryDC::~wxMemoryDC()
  52 {
  53 #ifdef __WXGTK20__
  54     g_object_unref(m_context);
  55 #endif
  56 }
  57
  58 void wxMemoryDC::SelectObject( const wxBitmap& bitmap )
  59 {
  60     Destroy();
  61     m_selected = bitmap;
  62     if (m_selected.Ok())
  63     {
  64         if (m_selected.GetPixmap())
  65         {
  66             m_window = m_selected.GetPixmap();
  67         }
  68         else
  69         {
  70             m_window = m_selected.GetBitmap();
  71         }
  72
  73 #ifdef __WXGTK20__
  74         m_selected.PurgeOtherRepresentations(wxBitmap::Pixmap);
  75 #endif
  76
  77         m_isMemDC = TRUE;
  78
  79         SetUpDC();
  80     }
  81     else
  82     {
  83         m_ok = FALSE;
  84         m_window = (GdkWindow *) NULL;
  85     }
  86 }
  87
  88 void wxMemoryDC::SetPen( const wxPen& penOrig )
  89 {
  90     wxPen pen( penOrig );
  91     if ( m_selected.Ok() &&
  92             m_selected.GetBitmap() &&
  93                 (pen != *wxTRANSPARENT_PEN) )
  94     {
  95         pen.SetColour( pen.GetColour() == *wxWHITE ? *wxBLACK : *wxWHITE );
  96     }
  97
  98     wxWindowDC::SetPen( pen );
  99 }
 100
 101 void wxMemoryDC::SetBrush( const wxBrush& brushOrig )
 102 {
 103     wxBrush brush( brushOrig );
 104     if ( m_selected.Ok() &&
 105             m_selected.GetBitmap() &&
 106                 (brush != *wxTRANSPARENT_BRUSH) )
 107     {
 108         brush.SetColour( brush.GetColour() == *wxWHITE ? *wxBLACK : *wxWHITE);
 109     }
 110
 111     wxWindowDC::SetBrush( brush );
 112 }
 113
 114 void wxMemoryDC::SetBackground( const wxBrush& brushOrig )
 115 {
 116     wxBrush brush(brushOrig);
 117
 118     if ( m_selected.Ok() &&
 119             m_selected.GetBitmap() &&
 120                 (brush != *wxTRANSPARENT_BRUSH) )
 121     {
 122         brush.SetColour( brush.GetColour() == *wxWHITE ? *wxBLACK : *wxWHITE );
 123     }
 124
 125     wxWindowDC::SetBackground( brush );
 126 }
 127
 128 void wxMemoryDC::SetTextForeground( const wxColour& col )
 129 {
 130     if ( m_selected.Ok() && m_selected.GetBitmap() )
 131     {
 132         wxWindowDC::SetTextForeground( col == *wxWHITE ? *wxBLACK : *wxWHITE);
 133     }
 134     else
 135     {
 136         wxWindowDC::SetTextForeground( col );
 137     }
 138 }
 139
 140 void wxMemoryDC::SetTextBackground( const wxColour &col )
 141 {
 142     if (m_selected.Ok() && m_selected.GetBitmap())
 143     {
 144         wxWindowDC::SetTextBackground( col == *wxWHITE ? *wxBLACK : *wxWHITE );
 145     }
 146     else
 147     {
 148         wxWindowDC::SetTextBackground( col );
 149     }
 150 }
 151
 152 void wxMemoryDC::DoGetSize( int *width, int *height ) const
 153 {
 154     if (m_selected.Ok())
 155     {
 156         if (width) (*width) = m_selected.GetWidth();
 157         if (height) (*height) = m_selected.GetHeight();
 158     }
 159     else
 160     {
 161         if (width) (*width) = 0;
 162         if (height) (*height) = 0;
 163     }
 164 }
 165
 166