2981a033e1
git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@14652 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
110 lines
2.5 KiB
C++
110 lines
2.5 KiB
C++
/////////////////////////////////////////////////////////////////////////////
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// Name: dcbuffer.cpp
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// Purpose: wxBufferedDC class
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// Author: Ron Lee <ron@debian.org>
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// Modified by:
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// Created: 16/03/02
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// RCS-ID: $Id$
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// Copyright: (c) Ron Lee
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// Licence: wxWindows licence
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/////////////////////////////////////////////////////////////////////////////
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#ifdef __GNUG__
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#pragma implementation "dcbuffer.h"
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#endif
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#include "wx/wxprec.h"
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#ifdef __BORLANDC__
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#pragma hdrstop
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#endif
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#ifndef WX_PRECOMP
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#include "wx/window.h"
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#endif
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#include "wx/dcbuffer.h"
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// ==============================================================
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// Double buffering helper.
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// --------------------------------------------------------------
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wxBufferedDC::wxBufferedDC( wxDC *dc, const wxBitmap &buffer )
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: m_dc( dc )
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, m_buffer( buffer )
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{
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SelectObject( m_buffer );
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}
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wxBufferedDC::wxBufferedDC( wxDC *dc, const wxSize &area )
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: m_dc( dc )
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, m_buffer( area.GetWidth(), area.GetHeight() )
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{
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SelectObject( m_buffer );
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}
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wxBufferedDC::~wxBufferedDC()
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{
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if( m_dc != 0 )
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{
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UnMask();
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}
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}
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void wxBufferedDC::Init( wxDC *dc, const wxBitmap &buffer )
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{
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wxASSERT_MSG( m_dc == 0 && m_buffer == wxNullBitmap,
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_T("wxBufferedDC already initialised") );
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m_dc = dc;
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m_buffer = buffer;
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SelectObject( m_buffer );
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}
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void wxBufferedDC::Init( wxDC *dc, const wxSize &area )
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{
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wxASSERT_MSG( m_dc == 0 && m_buffer == wxNullBitmap,
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_T("wxBufferedDC already initialised") );
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m_dc = dc;
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m_buffer = wxBitmap( area.GetWidth(), area.GetHeight() );
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SelectObject( m_buffer );
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}
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void wxBufferedDC::UnMask()
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{
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wxASSERT_MSG( m_dc != 0, _T("No low level DC associated with buffer (anymore)") );
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m_dc->Blit( 0, 0, m_buffer.GetWidth(), m_buffer.GetHeight(), this, 0, 0 );
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m_dc = 0;
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}
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// ==============================================================
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// Double buffered PaintDC.
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// --------------------------------------------------------------
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wxBufferedPaintDC::wxBufferedPaintDC( wxWindow *window, const wxBitmap &buffer )
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: m_paintdc( window )
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{
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window->PrepareDC( m_paintdc );
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if( buffer != wxNullBitmap )
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Init( &m_paintdc, buffer );
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else
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Init( &m_paintdc, window->GetClientSize() );
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}
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wxBufferedPaintDC::~wxBufferedPaintDC()
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{
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// We must UnMask here, else by the time the base class
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// does it, the PaintDC will have already been destroyed.
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UnMask();
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}
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// vi:sts=4:sw=4:et
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