CODEWITHSUNDEEP
pythonkivy
Zanko
Zanko

Reputation: 4694

Kivy understand self.pos and self.size

Whenever I try to span the canvas across the layout, all I have to do is this

<FloatLayout>:
    canvas:
        Color:
            rgba: 54 / 255, 60 / 255, 72 / 255, 1
        Rectangle:
            pos: self.pos
            size: self.size

I have been playing around and fail to understand what is self.pos referring to? By reading the documentation it seems the it points to current widget which should be Rectangle. However when I enter the debug mode, I notice that the default value of self.size is (100, 100).

Upvotes: 3

Views: 3286

Answers (2)

Tshirtman
Tshirtman

Reputation: 5947

Rectangle is not a widget, it's a canvas instruction, a widget is representation (a set of canvas instructions) + behavior (various methods like 'on_touch_down'). in kv, self always designate the current widget, so here, FloatLayout.

Widget's default size is indeed '(100, 100)' it's a default as good as any.

Upvotes: 6

Peter Badida
Peter Badida

Reputation: 12189

Default size of a widget is 100x100 and pos [0,0]. And Rectangle is not a widget, but an instruction on canvas. So you used an instruction to draw something on a canvas of a widget, which is by default 100x100 at [0,0].

Upvotes: 4

Related Questions