X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/c4a34cf8c5b5261f8726fdbfe0b2464dd35df268..2f0312f0c4150de91d2edb43f92217557dc9486b:/include/wx/dcbuffer.h diff --git a/include/wx/dcbuffer.h b/include/wx/dcbuffer.h index 6e26da6f97..521113e0c8 100644 --- a/include/wx/dcbuffer.h +++ b/include/wx/dcbuffer.h @@ -37,7 +37,11 @@ // does not prepare the window DC #define wxBUFFER_CLIENT_AREA 0x02 -class WXDLLEXPORT wxBufferedDC : public wxMemoryDC +// Set when not using specific buffer bitmap. Note that this +// is private style and not returned by GetStyle. +#define wxBUFFER_USES_SHARED_BUFFER 0x04 + +class WXDLLIMPEXP_CORE wxBufferedDC : public wxMemoryDC { public: // Default ctor, must subsequently call Init for two stage construction. @@ -50,10 +54,9 @@ public: // Construct a wxBufferedDC using a user supplied buffer. wxBufferedDC(wxDC *dc, - const wxBitmap& buffer = wxNullBitmap, + wxBitmap& buffer = wxNullBitmap, int style = wxBUFFER_CLIENT_AREA) - : m_dc(NULL), - m_buffer(NULL) + : m_dc(NULL), m_buffer(NULL) { Init(dc, buffer, style); } @@ -62,9 +65,7 @@ public: // (where area is usually something like the size of the window // being buffered) wxBufferedDC(wxDC *dc, const wxSize& area, int style = wxBUFFER_CLIENT_AREA) - : m_dc(NULL), - m_buffer(NULL) - + : m_dc(NULL), m_buffer(NULL) { Init(dc, area, style); } @@ -78,7 +79,7 @@ public: // These reimplement the actions of the ctors for two stage creation void Init(wxDC *dc, - const wxBitmap& buffer = wxNullBitmap, + wxBitmap& buffer = wxNullBitmap, int style = wxBUFFER_CLIENT_AREA) { InitCommon(dc, style); @@ -101,37 +102,20 @@ public: // Usually called in the dtor or by the dtor of derived classes if the // BufferedDC must blit before the derived class (which may own the dc it's // blitting to) is destroyed. - void UnMask() - { - wxCHECK_RET( m_dc, _T("No underlying DC in wxBufferedDC") ); - - wxCoord x = 0, - y = 0; - - if ( m_style & wxBUFFER_CLIENT_AREA ) - GetDeviceOrigin(&x, &y); - - m_dc->Blit(0, 0, m_buffer->GetWidth(), m_buffer->GetHeight(), - this, -x, -y ); - m_dc = NULL; - } + void UnMask(); // Set and get the style void SetStyle(int style) { m_style = style; } - int GetStyle() const { return m_style; } + int GetStyle() const { return m_style & ~wxBUFFER_USES_SHARED_BUFFER; } private: // common part of Init()s void InitCommon(wxDC *dc, int style) { - wxASSERT_MSG( !m_dc && !m_buffer, _T("wxBufferedDC already initialised") ); - wxCHECK_RET( dc, _T("can't associate NULL DC with wxBufferedDC") ); + wxASSERT_MSG( !m_dc, wxT("wxBufferedDC already initialised") ); m_dc = dc; m_style = style; - - // inherit the same layout direction as the original DC - SetLayoutDirection(dc->GetLayoutDirection()); } // check that the bitmap is valid and use it @@ -144,14 +128,14 @@ private: // could probably be a reference. wxDC *m_dc; - // the buffer (selected in this DC) - const wxBitmap *m_buffer; + // the buffer (selected in this DC), initially invalid + wxBitmap *m_buffer; // the buffering style int m_style; DECLARE_DYNAMIC_CLASS(wxBufferedDC) - DECLARE_NO_COPY_CLASS(wxBufferedDC) + wxDECLARE_NO_COPY_CLASS(wxBufferedDC); }; @@ -161,21 +145,21 @@ private: // Creates a double buffered wxPaintDC, optionally allowing the // user to specify their own buffer to use. -class WXDLLEXPORT wxBufferedPaintDC : public wxBufferedDC +class WXDLLIMPEXP_CORE wxBufferedPaintDC : public wxBufferedDC { public: // If no bitmap is supplied by the user, a temporary one will be created. - wxBufferedPaintDC(wxWindow *window, const wxBitmap& buffer, int style = wxBUFFER_CLIENT_AREA) + wxBufferedPaintDC(wxWindow *window, wxBitmap& buffer, int style = wxBUFFER_CLIENT_AREA) : m_paintdc(window) { // If we're buffering the virtual window, scale the paint DC as well if (style & wxBUFFER_VIRTUAL_AREA) window->PrepareDC( m_paintdc ); - if( buffer != wxNullBitmap ) + if( buffer.IsOk() ) Init(&m_paintdc, buffer, style); else - Init(&m_paintdc, window->GetClientSize(), style); + Init(&m_paintdc, GetBufferedSize(window, style), style); } // If no bitmap is supplied by the user, a temporary one will be created. @@ -186,7 +170,7 @@ public: if (style & wxBUFFER_VIRTUAL_AREA) window->PrepareDC( m_paintdc ); - Init(&m_paintdc, window->GetClientSize(), style); + Init(&m_paintdc, GetBufferedSize(window, style), style); } // default copy ctor ok. @@ -198,11 +182,20 @@ public: UnMask(); } +protected: + // return the size needed by the buffer: this depends on whether we're + // buffering just the currently shown part or the total (scrolled) window + static wxSize GetBufferedSize(wxWindow *window, int style) + { + return style & wxBUFFER_VIRTUAL_AREA ? window->GetVirtualSize() + : window->GetClientSize(); + } + private: wxPaintDC m_paintdc; DECLARE_ABSTRACT_CLASS(wxBufferedPaintDC) - DECLARE_NO_COPY_CLASS(wxBufferedPaintDC) + wxDECLARE_NO_COPY_CLASS(wxBufferedPaintDC); }; @@ -219,40 +212,25 @@ private: #define wxAutoBufferedPaintDCBase wxBufferedPaintDC #endif - -#ifdef __WXDEBUG__ - -class wxAutoBufferedPaintDC : public wxAutoBufferedPaintDCBase +class WXDLLIMPEXP_CORE wxAutoBufferedPaintDC : public wxAutoBufferedPaintDCBase { public: wxAutoBufferedPaintDC(wxWindow* win) : wxAutoBufferedPaintDCBase(win) { - TestWinStyle(win); + wxASSERT_MSG( win->GetBackgroundStyle() == wxBG_STYLE_PAINT, + "You need to call SetBackgroundStyle(wxBG_STYLE_PAINT) in ctor, " + "and also, if needed, paint the background in wxEVT_PAINT handler." + ); } virtual ~wxAutoBufferedPaintDC() { } private: - - void TestWinStyle(wxWindow* win) - { - // Help the user to get the double-buffering working properly. - wxASSERT_MSG( win->GetBackgroundStyle() == wxBG_STYLE_CUSTOM, - wxT("In constructor, you need to call SetBackgroundStyle(wxBG_STYLE_CUSTOM), ") - wxT("and also, if needed, paint the background manually in the paint event handler.")); - } - - DECLARE_NO_COPY_CLASS(wxAutoBufferedPaintDC) + wxDECLARE_NO_COPY_CLASS(wxAutoBufferedPaintDC); }; -#else // !__WXDEBUG__ - -// In release builds, just use typedef -typedef wxAutoBufferedPaintDCBase wxAutoBufferedPaintDC; - -#endif // Check if the window is natively double buffered and will return a wxPaintDC