Avoid needless second string conversion when adding files to memory FS.

[wxWidgets.git] / interface / wx / dcbuffer.h

diff --git a/interface/wx/dcbuffer.h b/interface/wx/dcbuffer.h
index 569ccdba0345959cfea96645733a77518b8e9b3a..93492e4b5a9457b05f2826e1c2f22e7733e8746b 100644 (file)
--- a/interface/wx/dcbuffer.h
+++ b/interface/wx/dcbuffer.h
@@ -3,12 +3,24 @@
 // Purpose:     interface of wxBufferedDC
 // Author:      wxWidgets team
 // RCS-ID:      $Id$
-// Licence:     wxWindows license
+// Licence:     wxWindows licence
 /////////////////////////////////////////////////////////////////////////////
 
+// Assumes the buffer bitmap covers the entire scrolled window,
+// and prepares the window DC accordingly
+#define wxBUFFER_VIRTUAL_AREA       0x01
+
+// Assumes the buffer bitmap only covers the client area;
+// does not prepare the window DC
+#define wxBUFFER_CLIENT_AREA        0x02
+
+// 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 wxBufferedDC
-    @wxheader{dcbuffer.h}
 
     This class provides a simple way to avoid flicker: when drawing on it,
     everything is in fact first drawn on an in-memory buffer (a wxBitmap) and
@@ -49,9 +61,8 @@ public:
     */
     wxBufferedDC();
 
-    //@{
     /**
-        Creates a buffer for the provided @dc. Init() must not be called when
+        Creates a buffer for the provided @a dc. Init() must not be called when
         using this constructor.
 
         @param dc
@@ -61,6 +72,22 @@ public:
         @param area
             The size of the bitmap to be used for buffering (this bitmap is
             created internally when it is not given explicitly).
+        @param style
+            wxBUFFER_CLIENT_AREA to indicate that just the client area of the
+            window is buffered, or wxBUFFER_VIRTUAL_AREA to indicate that the
+            buffer bitmap covers the virtual area.
+    */
+    wxBufferedDC(wxDC* dc, const wxSize& area,
+                 int style = wxBUFFER_CLIENT_AREA);
+
+    /**
+        Creates a buffer for the provided dc. Init() must not be called when
+        using this constructor.
+
+        @param dc
+            The underlying DC: everything drawn to this object will be flushed
+            to this DC when this object is destroyed. You may pass @NULL in
+            order to just initialize the buffer, and not flush it.
         @param buffer
             Explicitly provided bitmap to be used for buffering: this is the
             most efficient solution as the bitmap doesn't have to be recreated
@@ -72,17 +99,14 @@ public:
             window is buffered, or wxBUFFER_VIRTUAL_AREA to indicate that the
             buffer bitmap covers the virtual area.
     */
-    wxBufferedDC(wxDC* dc, const wxSize& area,
+    wxBufferedDC(wxDC* dc, wxBitmap& buffer = wxNullBitmap,
                  int style = wxBUFFER_CLIENT_AREA);
-    wxBufferedDC(wxDC* dc, wxBitmap& buffer,
-                 int style = wxBUFFER_CLIENT_AREA);
-    //@}
 
     /**
         Copies everything drawn on the DC so far to the underlying DC
         associated with this object, if any.
     */
-    ~wxBufferedDC();
+    virtual ~wxBufferedDC();
 
     //@{
     /**
@@ -91,7 +115,7 @@ public:
     */
     void Init(wxDC* dc, const wxSize& area,
               int style = wxBUFFER_CLIENT_AREA);
-    void Init(wxDC* dc, wxBitmap& buffer,
+    void Init(wxDC* dc, wxBitmap& buffer = wxNullBitmap,
               int style = wxBUFFER_CLIENT_AREA);
     //@}
 };
@@ -100,17 +124,16 @@ public:
 
 /**
     @class wxAutoBufferedPaintDC
-    @wxheader{dcbuffer.h}
 
     This wxDC derivative can be used inside of an @c EVT_PAINT() event handler
     to achieve double-buffered drawing. Just use this class instead of
     wxPaintDC and make sure wxWindow::SetBackgroundStyle() is called with
-    wxBG_STYLE_CUSTOM somewhere in the class initialization code, and that's
+    wxBG_STYLE_PAINT somewhere in the class initialization code, and that's
     all you have to do to (mostly) avoid flicker.
 
     The difference between wxBufferedPaintDC and this class is that this class
     won't double-buffer on platforms which have native double-buffering
-    already, avoiding any unneccessary buffering to avoid flicker.
+    already, avoiding any unnecessary buffering to avoid flicker.
 
     wxAutoBufferedPaintDC is simply a typedef of wxPaintDC on platforms that
     have native double-buffering, otherwise, it is a typedef of
@@ -134,12 +157,11 @@ public:
 
 /**
     @class wxBufferedPaintDC
-    @wxheader{dcbuffer.h}
 
     This is a subclass of wxBufferedDC which can be used inside of an
     @c EVT_PAINT() event handler to achieve double-buffered drawing. Just use
     this class instead of wxPaintDC and make sure
-    wxWindow::SetBackgroundStyle() is called with wxBG_STYLE_CUSTOM somewhere
+    wxWindow::SetBackgroundStyle() is called with wxBG_STYLE_PAINT somewhere
     in the class initialization code, and that's all you have to do to (mostly)
     avoid flicker. The only thing to watch out for is that if you are using
     this class together with wxScrolled, you probably do @b not want to call
@@ -175,6 +197,6 @@ public:
         Copies everything drawn on the DC so far to the window associated with
         this object, using a wxPaintDC.
     */
-    ~wxBufferedPaintDC();
+    virtual ~wxBufferedPaintDC();
 };