wxruby users - Nov 2008 - StaticBitmap

How can I take image from Rmagick object?
I try image.set_data(blob), but this wrong..
Is possible make scrollable StaticBitmap?
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Posted via http://www.ruby-forum.com/.

You will need to convert the data over from Rmagick format to wxRuby
format.  You have the basic idea, in which you need to retrieve the RGB
Pixel data from the RMagick object, and then apply that to a wxRuby Image
object.  However, you will also need to grab the Palette from RMagick, to
apply to the wxRuby Image Object, through Wx::Image#set_palette().

I believe this is the method in which you need to go about this, however,
I''ve never worked with Rmagick, and wxRuby personally.  But you
definately
need to go through Image#set_data() and Image#set_palette to make it work.
I think Alex may have a bit more experience with this, so he may be able to
give you a clearer answer to this question.

On Sat, Nov 15, 2008 at 8:47 PM, Cyrill Jakovlev <lists at
ruby-forum.com>wrote:
> How can I take image from Rmagick object?
> I try image.set_data(blob), but this wrong..
> Is possible make scrollable StaticBitmap?
> --
> Posted via http://www.ruby-forum.com/.
> _______________________________________________
> wxruby-users mailing list
> wxruby-users at rubyforge.org
> http://rubyforge.org/mailman/listinfo/wxruby-users
>


-- 
Mario Steele
http://www.trilake.net
http://www.ruby-im.net
http://rubyforge.org/projects/wxruby/
http://rubyforge.org/projects/wxride/
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Cyrill Jakovlev wrote:
> How can I take image from Rmagick object?
> I try image.set_data(blob), but this wrong..
>   
set_data uses a raw, uncompressed format, but it looks like RMagick''s 
to_blob method exports in known image formats.

I would use ruby''s stdlib StringIO to create an in-memory
representation
that Wx::Image can read from.

require ''stringio''
str_io = StringIO( rmagick_img.to_blob ) # with whatever arguments are 
needed for to_blob
img = Wx::Image.read(str_io, Wx::BITMAP_TYPE_PNG) # or other image format

Then use Wx::Bitmap.from_image to get an object suitable for drawing on 
the screen.
> Is possible make scrollable StaticBitmap?
>   
Use Wx::ScrolledWindow to create a scrollable viewing for any contents, 
including Wx::StaticBitmap. There''s different ways to use
ScrolledWindow
for which see the docs, but probably you could just use

scroll_win = Wx::ScrolledWindow.new(parent)
image = Wx::StaticBitmap.new( scroll_win, :label => bmp)
scroll_win.virtual_size = [ bmp.width, bmp.height ] # tell the window 
how big the whole canvas is
scroll_win.set_scroll_rate(5, 5) # scroll 5 pixels at a time, change as 
desired

alex

Thanks you, it''s work))
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