IntegerProperty

[Andrew McLeod]

Is there a reason that Integer properties aren't implemented?

I'm currently fighting with some buttons which should automatically display text based on an integer but with a format string

e.g.

MyWidget:

    my_integer: 3  # actually a Python property with allownone=True and might be set to None

    text: 'my_integer: {}'.format(self.my_integer or '')

and then binding that my_integer value from another property somewhere else. If I use a StringProperty I have to cast things on the Python side, and then '0' evaluates as True which I don't want.

If I use a NumericProperty, I have to cast it to an int in the format string which wouldn't be too much of a hassle except for when it is None...

So given that integers are fairly common in Kivy, I was just wondering why there isn't an IntegerProperty?

Andrew

[Alexander Taylor]

I'm not clear, what is your issue with storing integers in a NumericProperty? I just tried a simple test application and there was no implicit type conversion or other issue.





Enter code here...from kivy.properties import NumericProperty
from kivy.app import App
from kivy.lang import Builder

class TestApp(App):                                                                                                      
    number = NumericProperty(0)                                                                                          
                                                                                                                         
    def build(self):                                                                                                    
        root = Builder.load_string('''                                                                                  
BoxLayout:                                                                                                              
    orientation: 'vertical'                                                                                              
    Label:                                                                                                              
        text: '{} has type {}'.format(app.number, type(app.number))                                                      
    Button:                                                                                                              
        on_release: app.number += 1                                                                                      
        text: 'press me'                                                                                                
        ''')                                                                                                            
        return root                                                                                                      

TestApp().run()

[Elliot Garbus]

For what is worth, my kivy code would look like:

 

text: ‘my_integer: ‘ + str(my_integer) if my_integer else ‘’

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[Andrew McLeod]

I'd got a string output of 0.0 in my app, and assumed NumericProperty stored a float. I hadn't realised that the type of object passed would be stored within the NumericProperty with the value. So in this case probably user error...

Thanks anyway.