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