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made it possible to preserve background when using wxBufferedDC (replaces patch 876263); some refactoring

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git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@25567 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
This commit is contained in:
Vadim Zeitlin
2004-02-07 16:16:36 +00:00
parent de2ce07c7a
commit 1cc8c8b74e
2 changed files with 118 additions and 112 deletions
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81
src/generic/dcbuffer.cpp
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@@ -1,15 +1,14 @@
/////////////////////////////////////////////////////////////////////////////
// Name: dcbuffer.cpp
// Name: generic/dcbuffer.cpp
// Purpose: wxBufferedDC class
// Author: Ron Lee <ron@debian.org>
// Modified by:
// Modified by: Vadim Zeitlin (refactored, added bg preservation)
// Created: 16/03/02
// RCS-ID: $Id$
// Copyright: (c) Ron Lee
// Licence: wxWindows licence
/////////////////////////////////////////////////////////////////////////////
#if defined(__GNUG__) && !defined(NO_GCC_PRAGMA)
#pragma implementation "dcbuffer.h"
#endif
@@ -21,36 +20,29 @@
#endif
#ifndef WX_PRECOMP
#include "wx/window.h"
#include "wx/window.h"
#endif
#include "wx/dcbuffer.h"
// ----------------------------------------------------------------------------
// Double buffering helper.
// ----------------------------------------------------------------------------
// ==============================================================
// Double buffering helper.
// --------------------------------------------------------------
wxBufferedDC::wxBufferedDC( wxDC *dc, const wxBitmap &buffer )
: m_dc( dc )
, m_buffer( buffer )
wxBufferedDC::wxBufferedDC(wxDC *dc, const wxBitmap& buffer)
: m_dc( dc ),
m_buffer( buffer )
{
SelectObject( m_buffer );
UseBuffer();
}
wxBufferedDC::wxBufferedDC( wxDC *dc, const wxSize &area )
: m_dc( dc )
, m_buffer( area.GetWidth(), area.GetHeight() )
wxBufferedDC::wxBufferedDC(wxDC *dc, const wxSize& area, int flags)
: m_dc( dc ),
m_buffer( area.GetWidth(), area.GetHeight() )
{
SelectObject( m_buffer );
}
UseBuffer();
wxBufferedDC::~wxBufferedDC()
{
if( m_dc != 0 )
{
UnMask();
}
SaveBg(area, flags);
}
void wxBufferedDC::Init( wxDC *dc, const wxBitmap &buffer )
@@ -60,50 +52,23 @@ void wxBufferedDC::Init( wxDC *dc, const wxBitmap &buffer )
m_dc = dc;
m_buffer = buffer;
SelectObject( m_buffer );
UseBuffer();
}
void wxBufferedDC::Init( wxDC *dc, const wxSize &area )
void wxBufferedDC::Init(wxDC *dc, const wxSize& area, int flags)
{
wxASSERT_MSG( m_dc == 0 && m_buffer == wxNullBitmap,
_T("wxBufferedDC already initialised") );
Init(dc, wxBitmap(area.GetWidth(), area.GetHeight()));
m_dc = dc;
m_buffer = wxBitmap( area.GetWidth(), area.GetHeight() );
SelectObject( m_buffer );
SaveBg(area, flags);
}
void wxBufferedDC::UnMask()
{
wxASSERT_MSG( m_dc != 0, _T("No low level DC associated with buffer (anymore)") );
wxASSERT_MSG( m_dc != 0,
_T("No underlying DC associated with wxBufferedDC (anymore)") );
m_dc->Blit( 0, 0, m_buffer.GetWidth(), m_buffer.GetHeight(), this, 0, 0 );
m_dc = 0;
m_dc = NULL;
}
// ==============================================================
// Double buffered PaintDC.
// --------------------------------------------------------------
wxBufferedPaintDC::wxBufferedPaintDC( wxWindow *window, const wxBitmap &buffer )
: m_paintdc( window )
{
window->PrepareDC( m_paintdc );
if( buffer != wxNullBitmap )
Init( &m_paintdc, buffer );
else
Init( &m_paintdc, window->GetClientSize() );
}
wxBufferedPaintDC::~wxBufferedPaintDC()
{
// We must UnMask here, else by the time the base class
// does it, the PaintDC will have already been destroyed.
UnMask();
}
// vi:sts=4:sw=4:et