View Source wxBufferedPaintDC (wx v2.4.2)
Functions for wxBufferedPaintDC class
This is a subclass of wxBufferedDC which can be used inside of an
EVT_PAINT() event handler to achieve double-buffered drawing. Just use this
class instead of wxPaintDC and make sure wxWindow:setBackgroundStyle/2 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 (not
implemented in wx), you probably do not want to call
wxScrolledWindow:prepareDC/2 on it as it already does this internally for the
real underlying wxPaintDC.
See: wxDC, wxBufferedDC, wxAutoBufferedPaintDC (not implemented in
wx), wxPaintDC
This class is derived (and can use functions) from: wxBufferedDC
wxMemoryDC wxDC
wxWidgets docs: wxBufferedPaintDC
Summary
Functions
Copies everything drawn on the DC so far to the window associated with this
object, using a wxPaintDC.
As with wxBufferedDC, 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 used).
Types
-type wxBufferedPaintDC() :: wx:wx_object().
Functions
-spec destroy(This :: wxBufferedPaintDC()) -> ok.
Copies everything drawn on the DC so far to the window associated with this
object, using a wxPaintDC.
-spec new(Window) -> wxBufferedPaintDC() when Window :: wxWindow:wxWindow().
-spec new(Window, Buffer) -> wxBufferedPaintDC() when Window :: wxWindow:wxWindow(), Buffer :: wxBitmap:wxBitmap(); (Window, [Option]) -> wxBufferedPaintDC() when Window :: wxWindow:wxWindow(), Option :: {style, integer()}.
-spec new(Window, Buffer, [Option]) -> wxBufferedPaintDC() when Window :: wxWindow:wxWindow(), Buffer :: wxBitmap:wxBitmap(), Option :: {style, integer()}.
As with wxBufferedDC, 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 used).
Pass wxBUFFER_CLIENT_AREA for the style parameter 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.