How to call Training methods from an instance method?
I am trying to extend a Ruby application I already wrote to use Shoes. I have a class that I have already written and I want to be able to use a GUI with this class. That is, I want my class to have something like this:
class MyClass
def draw
# draw something using Shoes
end
end
Another method inside MyClass
will be called draw()
when it wants to draw something.
I've tried to do this in multiple ways and none of them seem to work. I could wrap the whole class in a Shoes app. Let's say I want to draw an oval:
Shoes.app {
class MyClass
def draw
oval :top => 100, :left => 100, :radius => 30
end
end
}
But then he speaks undefined method 'oval' for MyClass
.
I also tried this:
class MyClass
def draw
Shoes.app {
oval :top => 100, :left => 100, :radius => 30
}
end
end
This succeeds, but test()
a new window opens on every call .
How can I draw things using Shoes inside an instance method?
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Shoes.app { ... }
contains an instance of an instance of a code block. This means the block body is executed as if I were an instance Shoes
(or whatever class it uses under the hood). What you want to do is something like this:
class MyClass
def initialize(app)
@app = app
end
def draw
@app.oval :top => 100, :left => 100, :radius => 30
end
end
Shoes.app {
myclass = MyClass.new(self) # passing in the app here
myclass.draw
}
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What you can do is separate the GUI from the drawing. The reason new windows open every time is because Shoes.app is called every time the draw method is called.
Try the following:
class MyClass
def draw
oval :top => 100, :left => 100, :radius => 30
end
def test
draw
end
end
Shoes.app do
myclass = MyClass.new
myclass.test
end
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