Clock Max Iterations

[Mohamed Selim]

Hello Kivy Users,

I'm getting a critical info that says:

[CRITICAL] [Clock       ] Warning, too much iteration done before the next frame. Check your code, or increase the Clock.max_iteration attribute

In my code, I imported Clock, and in the build() method I added the line:

        Clock.max_iteration = 40

but that didn't affect the critical warning i'm getting

How can I increase the Clock.max_iteration attribute ??

--

Best Regards,

Mohamed Selim

[Mathieu Virbel]

Hi,

If you increase it, and you still get the issue, that doesn't mean it
not working, that's mean you've a recursive Clock iteration somewhere.

Example:

def do_something(...):
Clock.schedule_once(do_something, -1)

# start the event
Clock.schedule_once(do_something, -1)

=> -1 mean before the next frame. Mean if you still trying to schedule a
method between the next frame, it's infinite. And kivy broke the link.

In rare case, this can be triggered by layout (and it should be a bug).
If it's from us, give a code snippet to reproduce the issue :)

Thanks!

Mathieu

[Yurij Mikhassiak]

Hello. I am new member of kivy community. Thanks for your great work!

 I think I may found an isue.

If I put <Label> rule in kv string i get same iteration error with strange grafical results.

This code should reproduce the error:

#!/usr/bin/env python

# -*- coding: utf-8 -*-

from kivy.uix.gridlayout import GridLayout

from kivy.app import App

from kivy.lang import Builder

from kivy.uix.popup import Popup

from kivy.uix.button import Button

from kivy.uix.boxlayout import BoxLayout

Builder.load_string('''

<CustomPopup>:

    size_hint: .5, .5

    auto_dismiss: False

    title: 'Hello world'

    Button:

        text: 'Click me to dismiss'

        on_press: app.dismiss()

<Label>

    font_size: '24pt'

    text_size: self.width, self.height

    valign: 'middle'

    halign: 'center'

    markup: True

<TextInput>

    font_size: '24pt'

<Button>

    font_size: '16pt'

    

<Demo>:

    cols: 1

    padding: 10

    spacing: 10

    BoxLayout:

        

        size_hint_y: 0.05

        

        

        Label:

              

            text:

                ('[b]Demo controller v.0.1[/b]')

            markup: True

            font_size: '24pt'

           

      

    BoxLayout: 

        size_hint_y: 0.2 

        padding: 1 

        

        Label:

            

            text: 

                ('Some text')

            markup: True

            font_size: '24pt' 

        

        TextInput: 

        

            

            

        Button:

            text: 'Fire'

            on_press: root.show_popup()

           

        Label:

        

''')

class Demo(GridLayout):

    def show_popup(self):

        p = CustomPopup()

        p.open()

    

    

class CustomPopup(Popup):

    pass

class ControllerXYZApp(App):

    def build(self):

        return Demo()

    

    

   

if __name__ == '__main__':

    ControllerXYZApp().run()

If I remove: 

<Label>

    font_size: '24pt'

    text_size: self.width, self.height

    valign: 'middle'

    halign: 'center'

    markup: True

it will work as it should. 

Is it a bug? Can we fix it?

Also I've found undocumented isue that "\n" in kv files and kv string (Builder.load_string) behave in different ways. To reprosuce you can try to "load_string" from textalign.kv It will produce an error.



Regards, Yurij

Вівторок, 24 січня 2012 р. 12:42:34 UTC+2 користувач Mathieu Virbel написав:

[Akshay Arora]

You are overriding the default Label appearance. Forcing such usage for everything can break some internal Widgets that Kivy uses.

 In this case you are changing the default size of the font, forcing markup usage for every label and then setting text_size to the size of the label. This is the part that causes infinite loop I believe as The label for Title in popup needs it's height to be set to None.

     Label:

         text: root.title

         size_hint_y: None

         height: self.texture_size[1] + 16

         text_size: self.width - 16, None

Please DON'T over ride the default rules unless you absolutely know what you are doing.

You should instead create your own class

    MLabel(Label):

        pass

Then use this class MLabel in your kv set custom rules for it:

<MLabel>:

    ...

<CustomPopup>:

    ...

    MLabel:

    ...

Regards

[Yurij Mikhassiak]

Thank you so much!!!!

Вівторок, 22 січня 2013 р. 14:42:53 UTC+2 користувач qua-non написав: