projects / wxWidgets.git / blame
| Commit | Line | Data |
|---|---|---|
| 67e2efca RL |
1 | ///////////////////////////////////////////////////////////////////////////// |
| 2 | // Name: dcbuffer.cpp | |
| 3 | // Purpose: wxBufferedDC class | |
| 4 | // Author: Ron Lee <ron@debian.org> | |
| 5 | // Modified by: | |
| 6 | // Created: 16/03/02 | |
| 7 | // RCS-ID: $Id$ | |
| 8 | // Copyright: (c) Ron Lee | |
| 9 | // Licence: wxWindows licence | |
| 10 | ///////////////////////////////////////////////////////////////////////////// | |
| 11 | ||
| 12 | ||
| 13 | #ifdef __GNUG__ | |
| 14 | #pragma implementation "dcbuffer.h" | |
| 15 | #endif | |
| 16 | ||
| 2981a033 RL |
17 | #include "wx/wxprec.h" |
| 18 | ||
| 67e2efca RL |
19 | #ifdef __BORLANDC__ |
| 20 | #pragma hdrstop | |
| 21 | #endif | |
| 22 | ||
| 2981a033 RL |
23 | #ifndef WX_PRECOMP |
| 24 | #include "wx/window.h" | |
| 25 | #endif | |
| 26 | ||
| 67e2efca RL |
27 | #include "wx/dcbuffer.h" |
| 28 | ||
| 29 | ||
| 30 | // ============================================================== | |
| 31 | // Double buffering helper. | |
| 32 | // -------------------------------------------------------------- | |
| 33 | ||
| 34 | wxBufferedDC::wxBufferedDC( wxDC *dc, const wxBitmap &buffer ) | |
| 35 | : m_dc( dc ) | |
| 36 | , m_buffer( buffer ) | |
| 37 | { | |
| 38 | SelectObject( m_buffer ); | |
| 39 | } | |
| 40 | ||
| 41 | wxBufferedDC::wxBufferedDC( wxDC *dc, const wxSize &area ) | |
| 42 | : m_dc( dc ) | |
| 43 | , m_buffer( area.GetWidth(), area.GetHeight() ) | |
| 44 | { | |
| 45 | SelectObject( m_buffer ); | |
| 46 | } | |
| 47 | ||
| 48 | wxBufferedDC::~wxBufferedDC() | |
| 49 | { | |
| 50 | if( m_dc != 0 ) | |
| 51 | { | |
| 52 | UnMask(); | |
| 53 | } | |
| 54 | } | |
| 55 | ||
| 56 | void wxBufferedDC::Init( wxDC *dc, const wxBitmap &buffer ) | |
| 57 | { | |
| 58 | wxASSERT_MSG( m_dc == 0 && m_buffer == wxNullBitmap, | |
| 59 | _T("wxBufferedDC already initialised") ); | |
| 60 | ||
| 61 | m_dc = dc; | |
| 62 | m_buffer = buffer; | |
| 63 | SelectObject( m_buffer ); | |
| 64 | } | |
| 65 | ||
| 66 | void wxBufferedDC::Init( wxDC *dc, const wxSize &area ) | |
| 67 | { | |
| 68 | wxASSERT_MSG( m_dc == 0 && m_buffer == wxNullBitmap, | |
| 69 | _T("wxBufferedDC already initialised") ); | |
| 70 | ||
| 71 | m_dc = dc; | |
| 72 | m_buffer = wxBitmap( area.GetWidth(), area.GetHeight() ); | |
| 73 | SelectObject( m_buffer ); | |
| 74 | } | |
| 75 | ||
| 76 | void wxBufferedDC::UnMask() | |
| 77 | { | |
| 78 | wxASSERT_MSG( m_dc != 0, _T("No low level DC associated with buffer (anymore)") ); | |
| 79 | ||
| 80 | m_dc->Blit( 0, 0, m_buffer.GetWidth(), m_buffer.GetHeight(), this, 0, 0 ); | |
| 81 | m_dc = 0; | |
| 82 | } | |
| 83 | ||
| 84 | ||
| 85 | // ============================================================== | |
| 86 | // Double buffered PaintDC. | |
| 87 | // -------------------------------------------------------------- | |
| 88 | ||
| 89 | wxBufferedPaintDC::wxBufferedPaintDC( wxWindow *window, const wxBitmap &buffer ) | |
| 90 | : m_paintdc( window ) | |
| 91 | { | |
| 92 | window->PrepareDC( m_paintdc ); | |
| 93 | ||
| 94 | if( buffer != wxNullBitmap ) | |
| 95 | Init( &m_paintdc, buffer ); | |
| 96 | else | |
| 97 | Init( &m_paintdc, window->GetClientSize() ); | |
| 98 | } | |
| 99 | ||
| 100 | wxBufferedPaintDC::~wxBufferedPaintDC() | |
| 101 | { | |
| 102 | // We must UnMask here, else by the time the base class | |
| 103 | // does it, the PaintDC will have already been destroyed. | |
| 104 | ||
| 105 | UnMask(); | |
| 106 | } | |
| 107 | ||
| 108 | ||
| 109 | // vi:sts=4:sw=4:et |