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/gtk/dcmemory.h"
  14
  15 #include <gtk/gtk.h>
  16
  17 //-----------------------------------------------------------------------------
  18 // wxMemoryDCImpl
  19 //-----------------------------------------------------------------------------
  20
  21 IMPLEMENT_ABSTRACT_CLASS(wxMemoryDCImpl, wxWindowDCImpl)
  22
  23 wxMemoryDCImpl::wxMemoryDCImpl( wxMemoryDC *owner )
  24   : wxWindowDCImpl( owner )
  25 {
  26     Init();
  27 }
  28
  29 wxMemoryDCImpl::wxMemoryDCImpl( wxMemoryDC *owner, wxBitmap& bitmap)
  30   : wxWindowDCImpl( owner )
  31 {
  32     Init();
  33     DoSelect(bitmap);
  34 }
  35
  36 wxMemoryDCImpl::wxMemoryDCImpl( wxMemoryDC *owner, wxDC *WXUNUSED(dc) )
  37   : wxWindowDCImpl( owner )
  38 {
  39     Init();
  40 }
  41
  42 wxMemoryDCImpl::~wxMemoryDCImpl()
  43 {
  44     g_object_unref(m_context);
  45 }
  46
  47 void wxMemoryDCImpl::Init()
  48 {
  49     m_ok = false;
  50
  51     m_cmap = gtk_widget_get_default_colormap();
  52
  53     m_context = gdk_pango_context_get();
  54     // Note: The Sun customised version of Pango shipping with Solaris 10
  55     // crashes if the language is left NULL (see bug 1374114)
  56     pango_context_set_language( m_context, gtk_get_default_language() );
  57     m_layout = pango_layout_new( m_context );
  58     m_fontdesc = pango_font_description_copy( pango_context_get_font_description( m_context ) );
  59 }
  60
  61 void wxMemoryDCImpl::DoSelect( const wxBitmap& bitmap )
  62 {
  63     Destroy();
  64
  65     m_selected = bitmap;
  66     if (m_selected.IsOk())
  67     {
  68         m_gdkwindow = m_selected.GetPixmap();
  69
  70         m_selected.PurgeOtherRepresentations(wxBitmap::Pixmap);
  71
  72         SetUpDC( true );
  73     }
  74     else
  75     {
  76         m_ok = false;
  77         m_gdkwindow = NULL;
  78     }
  79 }
  80
  81 void wxMemoryDCImpl::SetPen( const wxPen& penOrig )
  82 {
  83     wxPen pen( penOrig );
  84     if ( m_selected.IsOk() &&
  85             m_selected.GetDepth() == 1 &&
  86                 (pen != *wxTRANSPARENT_PEN) )
  87     {
  88         pen.SetColour( pen.GetColour() == *wxWHITE ? *wxBLACK : *wxWHITE );
  89     }
  90
  91     wxWindowDCImpl::SetPen( pen );
  92 }
  93
  94 void wxMemoryDCImpl::SetBrush( const wxBrush& brushOrig )
  95 {
  96     wxBrush brush( brushOrig );
  97     if ( m_selected.IsOk() &&
  98             m_selected.GetDepth() == 1 &&
  99                 (brush != *wxTRANSPARENT_BRUSH) )
 100     {
 101         brush.SetColour( brush.GetColour() == *wxWHITE ? *wxBLACK : *wxWHITE);
 102     }
 103
 104     wxWindowDCImpl::SetBrush( brush );
 105 }
 106
 107 void wxMemoryDCImpl::SetBackground( const wxBrush& brushOrig )
 108 {
 109     wxBrush brush(brushOrig);
 110
 111     if ( m_selected.IsOk() &&
 112             m_selected.GetDepth() == 1 &&
 113                 (brush != *wxTRANSPARENT_BRUSH) )
 114     {
 115         brush.SetColour( brush.GetColour() == *wxWHITE ? *wxBLACK : *wxWHITE );
 116     }
 117
 118     wxWindowDCImpl::SetBackground( brush );
 119 }
 120
 121 void wxMemoryDCImpl::SetTextForeground( const wxColour& col )
 122 {
 123     if ( m_selected.IsOk() && m_selected.GetDepth() == 1 )
 124         wxWindowDCImpl::SetTextForeground( col == *wxWHITE ? *wxBLACK : *wxWHITE);
 125     else
 126         wxWindowDCImpl::SetTextForeground( col );
 127 }
 128
 129 void wxMemoryDCImpl::SetTextBackground( const wxColour &col )
 130 {
 131     if (m_selected.IsOk() && m_selected.GetDepth() == 1)
 132         wxWindowDCImpl::SetTextBackground( col == *wxWHITE ? *wxBLACK : *wxWHITE );
 133     else
 134         wxWindowDCImpl::SetTextBackground( col );
 135 }
 136
 137 void wxMemoryDCImpl::DoGetSize( int *width, int *height ) const
 138 {
 139     if (m_selected.IsOk())
 140     {
 141         if (width) (*width) = m_selected.GetWidth();
 142         if (height) (*height) = m_selected.GetHeight();
 143     }
 144     else
 145     {
 146         if (width) (*width) = 0;
 147         if (height) (*height) = 0;
 148     }
 149 }
 150
 151 wxBitmap wxMemoryDCImpl::DoGetAsBitmap(const wxRect *subrect) const
 152 {
 153     wxBitmap bmp = GetSelectedBitmap();
 154     return subrect ? bmp.GetSubBitmap(*subrect) : bmp;
 155 }
 156
 157 const wxBitmap& wxMemoryDCImpl::GetSelectedBitmap() const
 158 {
 159     return m_selected;
 160 }
 161
 162 wxBitmap& wxMemoryDCImpl::GetSelectedBitmap()
 163 {
 164     return m_selected;
 165 }
 166
 167 void* wxMemoryDCImpl::GetHandle() const
 168 {
 169     const wxBitmap& bmp = GetSelectedBitmap();
 170     return bmp.GetPixmap();
 171 }