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/dcmemory.h"
  14 #include "wx/gtk/dcmemory.h"
  15
  16 #include <gdk/gdk.h>
  17 #include <gtk/gtk.h>
  18
  19 #if wxUSE_GRAPHICS_CONTEXT
  20 #include "wx/graphics.h"
  21 #endif
  22
  23 //-----------------------------------------------------------------------------
  24 // wxMemoryDCImpl
  25 //-----------------------------------------------------------------------------
  26
  27 IMPLEMENT_ABSTRACT_CLASS(wxMemoryDCImpl, wxWindowDCImpl)
  28
  29 wxMemoryDCImpl::wxMemoryDCImpl( wxMemoryDC *owner )
  30   : wxWindowDCImpl( owner )
  31 {
  32     Init();
  33 }
  34
  35 wxMemoryDCImpl::wxMemoryDCImpl( wxMemoryDC *owner, wxBitmap& bitmap)
  36   : wxWindowDCImpl( owner )
  37 {
  38     Init();
  39     DoSelect(bitmap);
  40 }
  41
  42 wxMemoryDCImpl::wxMemoryDCImpl( wxMemoryDC *owner, wxDC *WXUNUSED(dc) )
  43   : wxWindowDCImpl( owner )
  44 {
  45     Init();
  46 }
  47
  48 wxMemoryDCImpl::~wxMemoryDCImpl()
  49 {
  50     g_object_unref(m_context);
  51 }
  52
  53 void wxMemoryDCImpl::Init()
  54 {
  55     m_ok = false;
  56
  57     m_cmap = gtk_widget_get_default_colormap();
  58
  59     m_context = gdk_pango_context_get();
  60     // Note: The Sun customised version of Pango shipping with Solaris 10
  61     // crashes if the language is left NULL (see bug 1374114)
  62     pango_context_set_language( m_context, gtk_get_default_language() );
  63     m_layout = pango_layout_new( m_context );
  64     m_fontdesc = pango_font_description_copy( pango_context_get_font_description( m_context ) );
  65 }
  66
  67 #if wxUSE_GRAPHICS_CONTEXT
  68 wxGraphicsContext* wxMemoryDCImpl::CreateGraphicsContext()
  69 {
  70     wxMemoryDC *memdc = (wxMemoryDC*) GetOwner();
  71     return wxGraphicsRenderer::GetDefaultRenderer()->CreateContext( *memdc );
  72 }
  73 #endif
  74
  75 void wxMemoryDCImpl::DoSelect( const wxBitmap& bitmap )
  76 {
  77     Destroy();
  78
  79     m_selected = bitmap;
  80     if (m_selected.Ok())
  81     {
  82         m_gdkwindow = m_selected.GetPixmap();
  83
  84         m_selected.PurgeOtherRepresentations(wxBitmap::Pixmap);
  85
  86         SetUpDC( true );
  87     }
  88     else
  89     {
  90         m_ok = false;
  91         m_gdkwindow = (GdkWindow *) NULL;
  92     }
  93 }
  94
  95 void wxMemoryDCImpl::SetPen( const wxPen& penOrig )
  96 {
  97     wxPen pen( penOrig );
  98     if ( m_selected.Ok() &&
  99             m_selected.GetDepth() == 1 &&
 100                 (pen != *wxTRANSPARENT_PEN) )
 101     {
 102         pen.SetColour( pen.GetColour() == *wxWHITE ? *wxBLACK : *wxWHITE );
 103     }
 104
 105     wxWindowDCImpl::SetPen( pen );
 106 }
 107
 108 void wxMemoryDCImpl::SetBrush( const wxBrush& brushOrig )
 109 {
 110     wxBrush brush( brushOrig );
 111     if ( m_selected.Ok() &&
 112             m_selected.GetDepth() == 1 &&
 113                 (brush != *wxTRANSPARENT_BRUSH) )
 114     {
 115         brush.SetColour( brush.GetColour() == *wxWHITE ? *wxBLACK : *wxWHITE);
 116     }
 117
 118     wxWindowDCImpl::SetBrush( brush );
 119 }
 120
 121 void wxMemoryDCImpl::SetBackground( const wxBrush& brushOrig )
 122 {
 123     wxBrush brush(brushOrig);
 124
 125     if ( m_selected.Ok() &&
 126             m_selected.GetDepth() == 1 &&
 127                 (brush != *wxTRANSPARENT_BRUSH) )
 128     {
 129         brush.SetColour( brush.GetColour() == *wxWHITE ? *wxBLACK : *wxWHITE );
 130     }
 131
 132     wxWindowDCImpl::SetBackground( brush );
 133 }
 134
 135 void wxMemoryDCImpl::SetTextForeground( const wxColour& col )
 136 {
 137     if ( m_selected.Ok() && m_selected.GetDepth() == 1 )
 138         wxWindowDCImpl::SetTextForeground( col == *wxWHITE ? *wxBLACK : *wxWHITE);
 139     else
 140         wxWindowDCImpl::SetTextForeground( col );
 141 }
 142
 143 void wxMemoryDCImpl::SetTextBackground( const wxColour &col )
 144 {
 145     if (m_selected.Ok() && m_selected.GetDepth() == 1)
 146         wxWindowDCImpl::SetTextBackground( col == *wxWHITE ? *wxBLACK : *wxWHITE );
 147     else
 148         wxWindowDCImpl::SetTextBackground( col );
 149 }
 150
 151 void wxMemoryDCImpl::DoGetSize( int *width, int *height ) const
 152 {
 153     if (m_selected.Ok())
 154     {
 155         if (width) (*width) = m_selected.GetWidth();
 156         if (height) (*height) = m_selected.GetHeight();
 157     }
 158     else
 159     {
 160         if (width) (*width) = 0;
 161         if (height) (*height) = 0;
 162     }
 163 }
 164
 165 wxBitmap wxMemoryDCImpl::DoGetAsBitmap(const wxRect *subrect) const
 166 {
 167     wxBitmap bmp = GetSelectedBitmap();
 168     return subrect ? bmp.GetSubBitmap(*subrect) : bmp;
 169 }
 170
 171 const wxBitmap& wxMemoryDCImpl::GetSelectedBitmap() const
 172 {
 173     return m_selected;
 174 }
 175
 176 wxBitmap& wxMemoryDCImpl::GetSelectedBitmap()
 177 {
 178     return m_selected;
 179 }
 180