kivy custom widget bind error

Question

I am trying to make a small tetris game for learning python with kivy. I am trying to create a custom widget with size 20,20. When I add it to the float layout and run the below code I receive the following error:

Error:

File "D:\OS Files\workspace\Tetris\holder.py", line 10, in __init__ self.add_widget(c)
File "C:\Kivy180\kivy\kivy\uix\floatlayout.py", line 115, in add_widget pos_hint=self._trigger_layout)
TypeError: descriptor 'bind' of 'kivy._event.EventDispatcher' object needs an argument

Code: holder.py File:

from items import Cell

class Holder(FloatLayout):
    def __init__(self, **kwargs):
        super(Holder,self).__init__(**kwargs)
        self.size=(300,300)
        c=Cell
        #c.pos= (20,20)
        self.add_widget(c)
        #self.add_widget(c)

items.py File:

from kivy.uix.widget import Widget
from kivy.graphics import *

class Cell(Widget):
    def __init__(self, **kwargs):
        super(Cell,self).__init__(**kwargs)
        with self.canvas:
            Color(1, 0, 0)
            Rectangle(pos=(0, 0), size=(50, 50))

        self.height=50
        self.width=50

main.py File:

from kivy.app import App
from holder import Holder

class start(App):
    def build(self):
        return Holder()

if __name__ == '__main__':
    start().run()

Could you please explain where I went wrong, I am stuck at the starting point itself. Regarding the error, I haven't written any events also, and it is just a widget class. Could you please explain where I went wrong in understanding kivy.

shouldn't c=Cell have parentheses and arguments and things...? — Kevin
– Kevin, Commented Jul 11, 2014 at 18:54
yup, thank you that helped. Can u keep it as a answer, I would mark it as correct. But for starter these are common error I believe, I am from VB.net and Visual Studios used to take care of small things — surpavan
– surpavan, Commented Jul 11, 2014 at 18:57

Kevin · Accepted Answer · 2014-07-11 18:58:41Z

3

c=Cell

I bet you want c to be an instance of the Cell class. If you want to do that, you need to do:

c=Cell()

answered Jul 11, 2014 at 18:58

Kevin

76.5k13 gold badges141 silver badges168 bronze badges

Sign up to request clarification or add additional context in comments.

3 Comments

surpavan Over a year ago

I used "c.pos= (200,200)", however, the widget is getting added at corner only, could you please correct me, again.

Kevin Over a year ago

Sorry, I don't actually know enough kivy to diagnose that problem :-(

surpavan Over a year ago

Fine, you answered my actual question. Thank you.

Collectives™ on Stack Overflow

kivy custom widget bind error

1 Answer 1

3 Comments

Your Answer

Linked

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

3 Comments

Your Answer

Sign up or log in

Post as a guest

Linked

Related