[wxruby-users] Black background using paint_buffered

[Mario Steele]

Dang you Alex,

You beat me to it. :P  Actually, another suggestion, would be to use
Wx::DC#draw_rectangle(), in which you set the Pen and Brush with the color
you want to use.

Simple Example (Not Tested):

<code>
pen = Wx::Pen.new(Wx::WHITE)
brush = Wx::Brush.new()
brush.colour(Wx::WHITE)

dc.set_pen(pen)
dc.set_brush(brush)
dc.draw_rectangle(0,0,self.width,self.height)

.... do your drawing here ....
</code>

L8ers,

On Wed, Apr 23, 2008 at 5:34 AM, Alex Fenton <alex at pressure.to> wrote:

> Andreas Warberg wrote:
> > To avoid flickering during screen updates in a Frame on Windows I
> > recently switched from
> >
> > paint do | dc |
> >    #...
> > end
> >
> > to
> >
> > paint_buffered do | dc |
> >    #...
> > end
> >
> > The background colour of the Frame is set to WHITE, which is respected
> > under paint, but is replaced by BLACK under paint_buffered.
> >
> > The painting jobs seems fine, though all my black lines become invisible
> > :P
> >
> > Is there something I can do to sort this out? Perhaps supply my own
> > buffer...
> >
> Yes, you can pass your own buffer as an optional argument to
> paint_buffered. It should be a Wx::Bitmap of the appropriate height and
> width.
>
> I will see if the ruby code that does paint_buffered could make the
> bitmap background match the window's.
>
> a
>
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-- 
Mario Steele
http://www.trilake.net
http://www.ruby-im.net
http://rubyforge.org/projects/wxruby/
http://rubyforge.org/projects/wxride/
http://rubyforge.org/projects/vwmc/
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