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 #if defined(__GNUG__) && !defined(NO_GCC_PRAGMA)
  11 #pragma implementation "dcmemory.h"
  12 #endif
  13
  14 // For compilers that support precompilation, includes "wx.h".
  15 #include "wx/wxprec.h"
  16
  17 #include "wx/dcmemory.h"
  18
  19 #include <gdk/gdk.h>
  20 #include <gtk/gtk.h>
  21
  22 //-----------------------------------------------------------------------------
  23 // wxMemoryDC
  24 //-----------------------------------------------------------------------------
  25
  26 IMPLEMENT_DYNAMIC_CLASS(wxMemoryDC,wxWindowDC)
  27
  28 wxMemoryDC::wxMemoryDC() : wxWindowDC()
  29 {
  30     m_ok = FALSE;
  31
  32     m_cmap = gtk_widget_get_default_colormap();
  33
  34 #ifdef __WXGTK20__
  35     m_context = gdk_pango_context_get();
  36     m_layout = pango_layout_new( m_context );
  37     m_fontdesc = pango_font_description_copy( pango_context_get_font_description( m_context ) );
  38 #endif
  39 }
  40
  41 wxMemoryDC::wxMemoryDC( wxDC *WXUNUSED(dc) )
  42   : wxWindowDC()
  43 {
  44     m_ok = FALSE;
  45
  46     m_cmap = gtk_widget_get_default_colormap();
  47
  48 #ifdef __WXGTK20__
  49     m_context = gdk_pango_context_get();
  50     m_layout = pango_layout_new( m_context );
  51     m_fontdesc = pango_font_description_copy( pango_context_get_font_description( m_context ) );
  52 #endif
  53 }
  54
  55 wxMemoryDC::~wxMemoryDC()
  56 {
  57 #ifdef __WXGTK20__
  58     g_object_unref(m_context);
  59 #endif
  60 }
  61
  62 void wxMemoryDC::SelectObject( const wxBitmap& bitmap )
  63 {
  64     Destroy();
  65     m_selected = bitmap;
  66     if (m_selected.Ok())
  67     {
  68         if (m_selected.GetPixmap())
  69         {
  70             m_window = m_selected.GetPixmap();
  71         }
  72         else
  73         {
  74             m_window = m_selected.GetBitmap();
  75         }
  76
  77 #ifdef __WXGTK20__
  78         m_selected.PurgeOtherRepresentations(wxBitmap::Pixmap);
  79 #endif
  80
  81         m_isMemDC = TRUE;
  82
  83         SetUpDC();
  84     }
  85     else
  86     {
  87         m_ok = FALSE;
  88         m_window = (GdkWindow *) NULL;
  89     }
  90 }
  91
  92 void wxMemoryDC::SetPen( const wxPen& penOrig )
  93 {
  94     wxPen pen( penOrig );
  95     if ( m_selected.Ok() &&
  96             m_selected.GetBitmap() &&
  97                 (pen != *wxTRANSPARENT_PEN) )
  98     {
  99         pen.SetColour( pen.GetColour() == *wxWHITE ? *wxBLACK : *wxWHITE );
 100     }
 101
 102     wxWindowDC::SetPen( pen );
 103 }
 104
 105 void wxMemoryDC::SetBrush( const wxBrush& brushOrig )
 106 {
 107     wxBrush brush( brushOrig );
 108     if ( m_selected.Ok() &&
 109             m_selected.GetBitmap() &&
 110                 (brush != *wxTRANSPARENT_BRUSH) )
 111     {
 112         brush.SetColour( brush.GetColour() == *wxWHITE ? *wxBLACK : *wxWHITE);
 113     }
 114
 115     wxWindowDC::SetBrush( brush );
 116 }
 117
 118 void wxMemoryDC::SetBackground( const wxBrush& brushOrig )
 119 {
 120     wxBrush brush(brushOrig);
 121
 122     if ( m_selected.Ok() &&
 123             m_selected.GetBitmap() &&
 124                 (brush != *wxTRANSPARENT_BRUSH) )
 125     {
 126         brush.SetColour( brush.GetColour() == *wxWHITE ? *wxBLACK : *wxWHITE );
 127     }
 128
 129     wxWindowDC::SetBackground( brush );
 130 }
 131
 132 void wxMemoryDC::SetTextForeground( const wxColour& col )
 133 {
 134     if ( m_selected.Ok() && m_selected.GetBitmap() )
 135     {
 136         wxWindowDC::SetTextForeground( col == *wxWHITE ? *wxBLACK : *wxWHITE);
 137     }
 138     else
 139     {
 140         wxWindowDC::SetTextForeground( col );
 141     }
 142 }
 143
 144 void wxMemoryDC::SetTextBackground( const wxColour &col )
 145 {
 146     if (m_selected.Ok() && m_selected.GetBitmap())
 147     {
 148         wxWindowDC::SetTextBackground( col == *wxWHITE ? *wxBLACK : *wxWHITE );
 149     }
 150     else
 151     {
 152         wxWindowDC::SetTextBackground( col );
 153     }
 154 }
 155
 156 void wxMemoryDC::DoGetSize( int *width, int *height ) const
 157 {
 158     if (m_selected.Ok())
 159     {
 160         if (width) (*width) = m_selected.GetWidth();
 161         if (height) (*height) = m_selected.GetHeight();
 162     }
 163     else
 164     {
 165         if (width) (*width) = 0;
 166         if (height) (*height) = 0;
 167     }
 168 }
 169
 170