wxruby users - Mar 2009 - How to put a background image on a panel

Well I''ve made a lot of progress on my app, but I''m stuck on
figuring
out how to add a bitmap. I have a notebook and a page panel. On this
panel I want to put a backdrop image and scale it to the size of the
panel. How do I do this? I looked at some of the samples related to
bitmaps and I could not see how to apply that to my situation.

Thanks,
T.

See: http://rubyforge.org/pipermail/wxruby-users/2009-January/004448.html

On Sun, Mar 22, 2009 at 9:03 PM, Trans <transfire at gmail.com> wrote:
> Well I''ve made a lot of progress on my app, but I''m stuck
on figuring
> out how to add a bitmap. I have a notebook and a page panel. On this
> panel I want to put a backdrop image and scale it to the size of the
> panel. How do I do this? I looked at some of the samples related to
> bitmaps and I could not see how to apply that to my situation.
>
> Thanks,
> T.
> _______________________________________________
> 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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2009/3/23 Mario Steele <mario at ruby-im.net>:
> See: http://rubyforge.org/pipermail/wxruby-users/2009-January/004448.html
Thanks. Though that only got me so far. I added:

  class Backdrop < Wx::Window
    def initialize(parent, image)
      @parent = parent
      @image  = Wx::Image.new(image)
      super(parent)
      evt_erase_background :on_erase_background
    end

    def on_erase_background(evt)
      size = @parent.get_client_size
      set_size(size)
      @image.scale(size.get_width, size.get_height)
      evt.dc.draw_bitmap(@image.to_bitmap, 0, 0, false)
    end
  end

And then added an instance of it to my panel''s boxsizer:

      file  = (DIR + ''/images/cover.jpg'')
      image = Backdrop.new(cover_panel, file)
      cover_sizer.add(image)

It draws the image initially but it isn''t scaled for some reason and
then when I resize the window it shrinks to a small square.

T.

Remove the set_size from the on_erase_background(), you shouldn''t use
set_size() in on_erase_background().

On Mon, Mar 23, 2009 at 5:19 AM, Trans <transfire at gmail.com> wrote:
> 2009/3/23 Mario Steele <mario at ruby-im.net>:
> > See:
> http://rubyforge.org/pipermail/wxruby-users/2009-January/004448.html
>
> Thanks. Though that only got me so far. I added:
>
>  class Backdrop < Wx::Window
>    def initialize(parent, image)
>      @parent = parent
>      @image  = Wx::Image.new(image)
>      super(parent)
>      evt_erase_background :on_erase_background
>    end
>
>    def on_erase_background(evt)
>      size = @parent.get_client_size
>      set_size(size)
>      @image.scale(size.get_width, size.get_height)
>      evt.dc.draw_bitmap(@image.to_bitmap, 0, 0, false)
>    end
>  end
>
> And then added an instance of it to my panel''s boxsizer:
>
>      file  = (DIR + ''/images/cover.jpg'')
>      image = Backdrop.new(cover_panel, file)
>      cover_sizer.add(image)
>
> It draws the image initially but it isn''t scaled for some reason
and
> then when I resize the window it shrinks to a small square.
>
> T.
> _______________________________________________
> 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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