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