Image Clearing

[LWFlouisa]

There was an issue with the clear command deleting everything. Image clearing didn't seem to do anything in Shoes 3. Has this problem been fixed in Shoes4?

Otherwise it just keeps stacking images, without the ability to clear the screen.

[ccoupe]

The clear command should delete everything in the slot. There have been improvements in Shoes 3 for managing the image cache That may help. You could file an issue with Shoes 3

[LWFlouisa]

Ah ok so it's an image cache issue? When I followed the advice a friend, that mentioned recreating the buttons every time you clear the screen:

Shoes.app do
  
  def clear_screen
    clear
  end
  
  def generate_poem
    system("ruby QRPoetry.rb")
  end
  
  # In this one, I can't seem to read the image unless it's in the main directory.
  def display_image
    image "poem.png"
  end
  
  def display_button
    button("Generate Poem") {
      c = clear_screen; i = image_clear; g = generate_poem; d = display_button; d = display_image
    }
    
    button("Exit") {
      exit
    }
  end
  
  flow do
    button("Generate Poem") {
      c = clear_screen; g = generate_poem; d = display_button; d = display_image
    }
    
    button("Exit") {
      exit
    }
  end
  
end

The system call refers to an external script that generates a QR code from a Ruby Gem, and I have the Shoes app display the image generated from the external script.