From: Patrick Hurley <phurley@...>
Date: 2006-02-03T04:20:28+09:00
Subject: Re: FXRuby Image Scaling question

On 2/2/06, Patrick Hurley <phurley@gmail.com> wrote:
> On 2/2/06, Patrick Hurley <phurley@gmail.com> wrote:
> > I have a screen with a logo on it, I would like the logo to scale with
> > screen size. I have tried more than a couple variations on:
> >
> >     # Construct an image
> >     @logo = FXPNGImage.new(getApp(), File.open("logo.png", "rb").read,
> > IMAGE_KEEP)
> >
> >     # Prep an image Frame
> >     image = FXImageFrame.new(self, @logo, LAYOUT_FILL_X | LAYOUT_FILL_Y)
> >     image.backColor = FXColor::Blue
> >
> >     image.connect(SEL_CONFIGURE) do |sender, sel, evt|
> >       if image.width > 100 && image.height > 100
> >         @logo.scale(image.width, image.height)
> >       end
> >     end
> >
> > This works, but the image "degrades" from all the scaling. How would I
> > go about keeping the original image? Any sort of "dup" on the FXImage
> > results in an exception (at least for me).
> >
> > Thanks in advance
> > pth
> >
> >
>
> Ok I am still very interested if there is a better solution, but this
> works for me:
>
>     # Construct an image
>     @logo = FXPNGImage.new(getApp(), File.open("logo.png", "rb").read,
> IMAGE_KEEP)
>     stream = FXMemoryStream.open(FXStreamSave,nil)
>     @logo.savePixels(stream)
>     puts stream
>     @buffer = stream.takeBuffer
>     stream.close
>     p @buffer
>
>     # Prep an image Frame
>     image = FXImageFrame.new(self, @logo, LAYOUT_FILL_X | LAYOUT_FILL_Y)
>     image.backColor = FXColor::Blue
>
>     image.connect(SEL_CONFIGURE) do |sender, sel, evt|
>       if image.width > 100 && image.height > 100
>         stream = FXMemoryStream.open(FXStreamLoad, @buffer)
>         @logo.loadPixels(stream)
>         @logo.scale(image.width, image.height)
>         stream.close
>       end
>     end
>   end
>
>

At the risk of talking to myself too much. Here is the cleaned up solution:

class FXScaledImageFrame < FXImageFrame
  def initialize(parent, img, opts =
FRAME_SUNKEN|FRAME_THICK,x=0,y=0,w=0,h=0,pl=0,pr=0,pt=0,pb=0)
    @img = img
    FXMemoryStream.open(FXStreamSave, nil) do |stream|
      @img.savePixels(stream)
      @buffer = stream.takeBuffer
    end

    super

    self.connect(SEL_CONFIGURE) do |sender, sel, evt|
      if width > 1 and height > 1
        FXMemoryStream.open(FXStreamLoad, @buffer) do |stream|
          @img.loadPixels(stream)
        end
        @img.scale(width, height)
      end
    end

    yield self if block_given?
  end
end