+BUFFER_VIRTUAL_AREA = _gdi_.BUFFER_VIRTUAL_AREA
+BUFFER_CLIENT_AREA = _gdi_.BUFFER_CLIENT_AREA
+class BufferedDC(MemoryDC):
+ """
+ This simple class provides a simple way to avoid flicker: when drawing
+ on it, everything is in fact first drawn on an in-memory buffer (a
+ `wx.Bitmap`) and then copied to the screen only once, when this object
+ is destroyed.
+
+ It can be used in the same way as any other device context.
+ wx.BufferedDC itself typically replaces `wx.ClientDC`, if you want to
+ use it in your EVT_PAINT handler, you should look at
+ `wx.BufferedPaintDC`.
+
+ Please note that GTK+ 2.0 and OS X provide double buffering themselves
+ natively. wxBufferedDC is aware of this however, and will bypass the buffering
+ unless an explicit buffer bitmap is given.
+
+ """
+ thisown = property(lambda x: x.this.own(), lambda x, v: x.this.own(v), doc='The membership flag')
+ __repr__ = _swig_repr
+ def __init__(self, *args):
+ """
+ __init__(self, DC dc, Bitmap buffer=NullBitmap, int style=BUFFER_CLIENT_AREA) -> BufferedDC
+ __init__(self, DC dc, Size area, int style=BUFFER_CLIENT_AREA) -> BufferedDC
+
+ Constructs a buffered DC.
+
+ :param dc: The underlying DC: everything drawn to this object will
+ be flushed to this DC when this object is destroyed. You may
+ pass ``None`` in order to just initialize the buffer, and not
+ flush it.
+
+ :param buffer: If a `wx.Size` object is passed as the 2nd arg then
+ it is the size of the bitmap that will be created internally
+ and used for an implicit buffer. If the 2nd arg is a
+ `wx.Bitmap` then it is the explicit buffer that will be
+ used. Using an explicit buffer is the most efficient solution
+ as the bitmap doesn't have to be recreated each time but it
+ also requires more memory as the bitmap is never freed. The
+ bitmap should have appropriate size, anything drawn outside of
+ its bounds is clipped. If wx.NullBitmap is used then a new
+ buffer will be allocated that is the same size as the dc.
+
+ :param style: The style parameter indicates whether the supplied buffer is
+ intended to cover the entire virtual size of a `wx.ScrolledWindow` or
+ if it only covers the client area. Acceptable values are
+ ``wx.BUFFER_VIRTUAL_AREA`` and ``wx.BUFFER_CLIENT_AREA``.
+
+
+ """
+ _gdi_.BufferedDC_swiginit(self,_gdi_.new_BufferedDC(*args))
+ self.__dc = args[0] # save a ref so the other dc will not be deleted before self
+
+ __swig_destroy__ = _gdi_.delete_BufferedDC
+ __del__ = lambda self : None;
+ def UnMask(*args, **kwargs):
+ """
+ UnMask(self)
+
+ Blits the buffer to the dc, and detaches the dc from the buffer (so it
+ can be effectively used once only). This is usually only called in
+ the destructor.
+ """
+ return _gdi_.BufferedDC_UnMask(*args, **kwargs)
+
+_gdi_.BufferedDC_swigregister(BufferedDC)
+
+class BufferedPaintDC(BufferedDC):
+ """
+ This is a subclass of `wx.BufferedDC` which can be used inside of an
+ EVT_PAINT event handler. Just create an object of this class instead
+ of `wx.PaintDC` 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 `wx.ScrolledWindow`, you probably do **not** want
+ to call `wx.Window.PrepareDC` on it as it already does this internally
+ for the real underlying `wx.PaintDC`.
+
+ If your window is already fully buffered in a `wx.Bitmap` then your
+ EVT_PAINT handler can be as simple as just creating a
+ ``wx.BufferedPaintDC`` as it will `Blit` the buffer to the window
+ automatically when it is destroyed. For example::
+
+ def OnPaint(self, event):
+ dc = wx.BufferedPaintDC(self, self.buffer)
+
+
+
+ """
+ thisown = property(lambda x: x.this.own(), lambda x, v: x.this.own(v), doc='The membership flag')
+ __repr__ = _swig_repr
+ def __init__(self, *args, **kwargs):
+ """
+ __init__(self, Window window, Bitmap buffer=NullBitmap, int style=BUFFER_CLIENT_AREA) -> BufferedPaintDC
+
+ Create a buffered paint DC. As with `wx.BufferedDC`, you may either
+ provide the bitmap to be used for buffering or let this object create
+ one internally (in the latter case, the size of the client part of the
+ window is automatically used).
+ """
+ _gdi_.BufferedPaintDC_swiginit(self,_gdi_.new_BufferedPaintDC(*args, **kwargs))
+_gdi_.BufferedPaintDC_swigregister(BufferedPaintDC)
+
+#---------------------------------------------------------------------------
+
+class AutoBufferedPaintDC(DC):
projects / wxWidgets.git / blobdiff