FXRuby Image Scaling question


#1

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


#2

On 2/2/06, Patrick H. removed_email_address@domain.invalid wrote:

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


#3

On 2/2/06, Patrick H. removed_email_address@domain.invalid wrote:

image.backColor = FXColor::Blue

IMAGE_KEEP)

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