Green Shoes v1.0

Red Shoes and Green Shoes

Green Shoes follows Red Shoes APIs, but not stick to 100% API compatible. Red Shoes includes it's own ruby interpreter. So, you don't have to install Ruby. Even if you've already install ruby interpreter, Red Shoes doesn't use that. Green Shoes is just a gem written in pure Ruby. Red Shoes is written in C and Ruby.

Let's talk about the difference.

TextBlock width

The following two snippets are same in Red Shoes.


 Shoes.app do
   para 'hello ' * 20
 end


 Shoes.app do
   20.times{para 'hello '}
 end

But in Green Shoes, need to add :width size explicitly.


 Shoes.app do
   20.times{para 'hello ', width: 40}
 end

If you don't specify the :width size, Green Shoes makes a TextBlock object with the parent.width.

Open two Shoes.app at a time


 Shoes.app{para 'hello'}
 Shoes.app{para 'hi'}

Red Shoes opens two Shoes.app windows at a time. But Green Shoes opens the first window only. If you want to open two windows at a time with Green Shoes, try out the following.


 Shoes.app do 
   para 'hello'
   Shoes.app{para 'hi'}
 end

Calculate width and height

This snippet works well on Red Shoes. But doesn't on Green Shoes.


 Shoes.app do 
   button 'hello', width: 0.5
   list_box width: 0.5
 end

Green Shoes needs a slot explicitly to calculate width and height.


 Shoes.app do
   stack do
     button 'hello', width: 0.5
     list_box width: 0.5
   end
 end

Color

In Red Shoes red is an object of Shoes::Color class, but in Green Shoes it's just an array.


 Shoes.app do
   para red       #=> rgb(255, 0, 0) : [1.0, 0.0, 0.0]
   para red.class #=> Shoes::Color   : Array
 end

& and <

Red Shoes can handle '&' and '<' normally.


 Shoes.app do
   para '& and <'
 end

But in Green Shoes, you have to replace them to '&amp;' and '&lt;' as like as HTML specific characters.


 Shoes.app do
   para '&amp; and &lt;'
 end