src/common/overlaycmn.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        src/common/overlaycmn.cpp
   3 // Purpose:     common wxOverlay code
   4 // Author:      Stefan Csomor
   5 // Modified by:
   6 // Created:     2006-10-20
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) wxWidgets team
   9 // Licence:     wxWindows licence
  10 /////////////////////////////////////////////////////////////////////////////
  11
  12 // ============================================================================
  13 // declarations
  14 // ============================================================================
  15
  16 // ----------------------------------------------------------------------------
  17 // headers
  18 // ----------------------------------------------------------------------------
  19
  20 // For compilers that support precompilation, includes "wx.h".
  21 #include "wx/wxprec.h"
  22
  23 #ifdef __BORLANDC__
  24     #pragma hdrstop
  25 #endif
  26
  27 #include "wx/overlay.h"
  28 #include "wx/private/overlay.h"
  29 #include "wx/dcclient.h"
  30 #include "wx/dcmemory.h"
  31
  32 // ============================================================================
  33 // implementation
  34 // ============================================================================
  35
  36 // ----------------------------------------------------------------------------
  37 // wxOverlay
  38 // ----------------------------------------------------------------------------
  39
  40 wxOverlay::wxOverlay()
  41 {
  42     m_impl = new wxOverlayImpl();
  43     m_inDrawing = false;
  44 }
  45
  46 wxOverlay::~wxOverlay()
  47 {
  48     delete m_impl;
  49 }
  50
  51 bool wxOverlay::IsOk()
  52 {
  53     return m_impl->IsOk();
  54 }
  55
  56 void wxOverlay::Init( wxDC* dc, int x , int y , int width , int height )
  57 {
  58     m_impl->Init(dc, x, y, width, height);
  59 }
  60
  61 void wxOverlay::BeginDrawing( wxDC* dc)
  62 {
  63     m_impl->BeginDrawing(dc);
  64     m_inDrawing = true ;
  65 }
  66
  67 void wxOverlay::EndDrawing( wxDC* dc)
  68 {
  69     m_impl->EndDrawing(dc);
  70     m_inDrawing = false ;
  71 }
  72
  73 void wxOverlay::Clear( wxDC* dc)
  74 {
  75     m_impl->Clear(dc);
  76 }
  77
  78 void wxOverlay::Reset()
  79 {
  80     wxASSERT_MSG(m_inDrawing==false,wxT("cannot reset overlay during drawing"));
  81     m_impl->Reset();
  82 }
  83
  84
  85 // ----------------------------------------------------------------------------
  86 // wxDCOverlay
  87 // ----------------------------------------------------------------------------
  88
  89 wxDCOverlay::wxDCOverlay(wxOverlay &overlay, wxDC *dc, int x , int y , int width , int height) :
  90     m_overlay(overlay)
  91 {
  92     Init(dc, x, y, width, height);
  93 }
  94
  95 wxDCOverlay::wxDCOverlay(wxOverlay &overlay, wxDC *dc) :
  96     m_overlay(overlay)
  97 {
  98     int width;
  99     int height;
 100     dc->GetSize(&width,&height);
 101     Init(dc, 0, 0, width, height);
 102 }
 103
 104 wxDCOverlay::~wxDCOverlay()
 105 {
 106     m_overlay.EndDrawing(m_dc);
 107 }
 108
 109 void wxDCOverlay::Init(wxDC *dc, int x , int y , int width , int height )
 110 {
 111     m_dc = dc ;
 112     if ( !m_overlay.IsOk() )
 113     {
 114         m_overlay.Init(dc,x,y,width,height);
 115     }
 116     m_overlay.BeginDrawing(dc);
 117 }
 118
 119 void wxDCOverlay::Clear()
 120 {
 121     m_overlay.Clear(m_dc);
 122 }
 123
 124 // ----------------------------------------------------------------------------
 125 // generic implementation of wxOverlayImpl
 126 // ----------------------------------------------------------------------------
 127
 128 #ifndef wxHAS_NATIVE_OVERLAY
 129
 130 wxOverlayImpl::wxOverlayImpl()
 131 {
 132      m_window = NULL ;
 133      m_x = m_y = m_width = m_height = 0 ;
 134 }
 135
 136 wxOverlayImpl::~wxOverlayImpl()
 137 {
 138 }
 139
 140 bool wxOverlayImpl::IsOk()
 141 {
 142     return m_bmpSaved.IsOk() ;
 143 }
 144
 145 void wxOverlayImpl::Init( wxDC* dc, int x , int y , int width , int height )
 146 {
 147     m_window = dc->GetWindow();
 148     wxMemoryDC dcMem ;
 149     m_bmpSaved.Create( width, height );
 150     dcMem.SelectObject( m_bmpSaved );
 151     m_x = x ;
 152     m_y = y ;
 153     m_width = width ;
 154     m_height = height ;
 155     dcMem.Blit(0, 0, m_width, m_height,
 156         dc, x, y);
 157     dcMem.SelectObject( wxNullBitmap );
 158 }
 159
 160 void wxOverlayImpl::Clear(wxDC* dc)
 161 {
 162     wxMemoryDC dcMem ;
 163     dcMem.SelectObject( m_bmpSaved );
 164     dc->Blit( m_x, m_y, m_width, m_height , &dcMem , 0 , 0 );
 165     dcMem.SelectObject( wxNullBitmap );
 166 }
 167
 168 void wxOverlayImpl::Reset()
 169 {
 170     m_bmpSaved = wxBitmap();
 171 }
 172
 173 void wxOverlayImpl::BeginDrawing(wxDC*  WXUNUSED(dc))
 174 {
 175 }
 176
 177 void wxOverlayImpl::EndDrawing(wxDC* WXUNUSED(dc))
 178 {
 179 }
 180
 181 #endif // !wxHAS_NATIVE_OVERLAY
 182
 183