src/gtk/dcmemory.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        src/gtk/dcmemory.cpp
   3 // Purpose:
   4 // Author:      Robert Roebling
   5 // Copyright:   (c) 1998 Robert Roebling
   6 // Licence:     wxWindows licence
   7 /////////////////////////////////////////////////////////////////////////////
   8
   9 // For compilers that support precompilation, includes "wx.h".
  10 #include "wx/wxprec.h"
  11
  12 #include "wx/gtk/dcmemory.h"
  13
  14 #include <gtk/gtk.h>
  15
  16 //-----------------------------------------------------------------------------
  17 // wxMemoryDCImpl
  18 //-----------------------------------------------------------------------------
  19
  20 IMPLEMENT_ABSTRACT_CLASS(wxMemoryDCImpl, wxWindowDCImpl)
  21
  22 wxMemoryDCImpl::wxMemoryDCImpl( wxMemoryDC *owner )
  23   : wxWindowDCImpl( owner )
  24 {
  25     Init();
  26 }
  27
  28 wxMemoryDCImpl::wxMemoryDCImpl( wxMemoryDC *owner, wxBitmap& bitmap)
  29   : wxWindowDCImpl( owner )
  30 {
  31     Init();
  32     DoSelect(bitmap);
  33 }
  34
  35 wxMemoryDCImpl::wxMemoryDCImpl( wxMemoryDC *owner, wxDC *WXUNUSED(dc) )
  36   : wxWindowDCImpl( owner )
  37 {
  38     Init();
  39 }
  40
  41 wxMemoryDCImpl::~wxMemoryDCImpl()
  42 {
  43     g_object_unref(m_context);
  44 }
  45
  46 void wxMemoryDCImpl::Init()
  47 {
  48     m_ok = false;
  49
  50     m_cmap = gtk_widget_get_default_colormap();
  51
  52     m_context = gdk_pango_context_get();
  53     // Note: The Sun customised version of Pango shipping with Solaris 10
  54     // crashes if the language is left NULL (see bug 1374114)
  55     pango_context_set_language( m_context, gtk_get_default_language() );
  56     m_layout = pango_layout_new( m_context );
  57     m_fontdesc = pango_font_description_copy( pango_context_get_font_description( m_context ) );
  58 }
  59
  60 void wxMemoryDCImpl::DoSelect( const wxBitmap& bitmap )
  61 {
  62     Destroy();
  63
  64     m_selected = bitmap;
  65     if (m_selected.IsOk())
  66     {
  67         m_gdkwindow = m_selected.GetPixmap();
  68
  69         m_selected.PurgeOtherRepresentations(wxBitmap::Pixmap);
  70
  71         SetUpDC( true );
  72     }
  73     else
  74     {
  75         m_ok = false;
  76         m_gdkwindow = NULL;
  77     }
  78 }
  79
  80 void wxMemoryDCImpl::SetPen( const wxPen& penOrig )
  81 {
  82     wxPen pen( penOrig );
  83     if ( m_selected.IsOk() &&
  84             m_selected.GetDepth() == 1 &&
  85                 (pen != *wxTRANSPARENT_PEN) )
  86     {
  87         pen.SetColour( pen.GetColour() == *wxWHITE ? *wxBLACK : *wxWHITE );
  88     }
  89
  90     wxWindowDCImpl::SetPen( pen );
  91 }
  92
  93 void wxMemoryDCImpl::SetBrush( const wxBrush& brushOrig )
  94 {
  95     wxBrush brush( brushOrig );
  96     if ( m_selected.IsOk() &&
  97             m_selected.GetDepth() == 1 &&
  98                 (brush != *wxTRANSPARENT_BRUSH) )
  99     {
 100         brush.SetColour( brush.GetColour() == *wxWHITE ? *wxBLACK : *wxWHITE);
 101     }
 102
 103     wxWindowDCImpl::SetBrush( brush );
 104 }
 105
 106 void wxMemoryDCImpl::SetBackground( const wxBrush& brushOrig )
 107 {
 108     wxBrush brush(brushOrig);
 109
 110     if ( m_selected.IsOk() &&
 111             m_selected.GetDepth() == 1 &&
 112                 (brush != *wxTRANSPARENT_BRUSH) )
 113     {
 114         brush.SetColour( brush.GetColour() == *wxWHITE ? *wxBLACK : *wxWHITE );
 115     }
 116
 117     wxWindowDCImpl::SetBackground( brush );
 118 }
 119
 120 void wxMemoryDCImpl::SetTextForeground( const wxColour& col )
 121 {
 122     if ( m_selected.IsOk() && m_selected.GetDepth() == 1 )
 123         wxWindowDCImpl::SetTextForeground( col == *wxWHITE ? *wxBLACK : *wxWHITE);
 124     else
 125         wxWindowDCImpl::SetTextForeground( col );
 126 }
 127
 128 void wxMemoryDCImpl::SetTextBackground( const wxColour &col )
 129 {
 130     if (m_selected.IsOk() && m_selected.GetDepth() == 1)
 131         wxWindowDCImpl::SetTextBackground( col == *wxWHITE ? *wxBLACK : *wxWHITE );
 132     else
 133         wxWindowDCImpl::SetTextBackground( col );
 134 }
 135
 136 void wxMemoryDCImpl::DoGetSize( int *width, int *height ) const
 137 {
 138     if (m_selected.IsOk())
 139     {
 140         if (width) (*width) = m_selected.GetWidth();
 141         if (height) (*height) = m_selected.GetHeight();
 142     }
 143     else
 144     {
 145         if (width) (*width) = 0;
 146         if (height) (*height) = 0;
 147     }
 148 }
 149
 150 wxBitmap wxMemoryDCImpl::DoGetAsBitmap(const wxRect *subrect) const
 151 {
 152     wxBitmap bmp = GetSelectedBitmap();
 153     return subrect ? bmp.GetSubBitmap(*subrect) : bmp;
 154 }
 155
 156 const wxBitmap& wxMemoryDCImpl::GetSelectedBitmap() const
 157 {
 158     return m_selected;
 159 }
 160
 161 wxBitmap& wxMemoryDCImpl::GetSelectedBitmap()
 162 {
 163     return m_selected;
 164 }
 165
 166 void* wxMemoryDCImpl::GetHandle() const
 167 {
 168     const wxBitmap& bmp = GetSelectedBitmap();
 169     return bmp.GetPixmap();
 170 }