gorskijoza
Elliot Garbus
Use bind, to associate the change in state with a method to change the color.
https://kivy.org/doc/stable/api-kivy.properties.html?highlight=bind#observe-using-bind
from kivy.app import App
from kivy.uix.togglebutton import ToggleButton
class BindApp(App):
def build(self):
tb = ToggleButton(text='Test Button',color=(1, 0, 0, 1))
tb.bind(state=self.color_change)
return tb
def color_change(self, instance, value):
print(f'ins {instance}, v: {value}')
instance.color = (1, 0, 0, 1) if value == 'normal' else (1, 1, 1, 1)
BindApp().run()
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gorskijoza
Dne petek, 07. avgust 2020 17.45.42 UTC+2 je oseba Elliot Garbus napisala:
Use bind, to associate the change in state with a method to change the color.
https://kivy.org/doc/stable/api-kivy.properties.html?highlight=bind#observe-using-bind
from kivy.app import App
from kivy.uix.togglebutton import ToggleButton
class BindApp(App):
def build(self):
tb = ToggleButton(text='Test Button',color=(1, 0, 0, 1))
tb.bind(state=self.color_change)
return tb
def color_change(self, instance, value):
print(f'ins {instance}, v: {value}')
instance.color = (1, 0, 0, 1) if value == 'normal' else (1, 1, 1, 1)
BindApp().run()
From: gorskijoza
Sent: Friday, August 7, 2020 3:49 AM
To: Kivy users support
Subject: [kivy-users] Button's attribute
Hi everyone,
one short question - how can I use button attrubute in python?
label1= ToggleButton(text='Basic\nlayer', group='b', background_normal= 'atlas://tabs/normal', background_down= 'atlas://tabs/down', color= (1, 1, 1, .6) if self.state == 'normal' else (1, 1, 1, 1) )
I want to use button state, to define text color.
Thanks
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Elliot Garbus
Yes, you can create a new class of button derived from button, and instance that new button where you want this behavior.
from kivy.app import App
from kivy.lang import Builder
from kivy.uix.togglebutton import ToggleButton
kv = """
<ColorToggle>:
color: 1, 0, 0, 1
on_release: self.color = {'normal':(1, 0, 0, 1), 'down':(1, 1, 1, 1)}[self.state]
GridLayout:
id: grid
cols: 3
"""
class ColorToggle(ToggleButton):
pass
class ColorButtonApp(App):
def build(self):
return Builder.load_string(kv)
def on_start(self):
for i in range(30):
ct = ColorToggle(text=f'Button {i}')
self.root.add_widget(ct)
ColorButtonApp().run()
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Tomaž Vodlan
To view this discussion on the web visit https://groups.google.com/d/msgid/kivy-users/5f314e66.1c69fb81.21f44.8fedSMTPIN_ADDED_MISSING%40gmr-mx.google.com.
Elliot Garbus
Yes you can change the state of the button, the same way you would change any other attribute. You can do this in kv or in any class.
To view this discussion on the web visit https://groups.google.com/d/msgid/kivy-users/CAGf4y6yFaxLzoN9JOC6hugkPxy%2BM4XjvhWpyt9swAr9Od5unsQ%40mail.gmail.com.
Tomaž Vodlan
tb = ToggleButton(text='Test Button', id = 'tog', ,color=(1, 0, 0, 1))
and now I want to change the button state in method y
def y(self):
self.ids.tog.state = 'normal'
Is this correct?
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Elliot Garbus
This is not correct.
The id and ids dict, are created in kv. You declare an id in kv, when the kv is processed it creates it puts the id in the ids dictionary. The id is the key, the object with the id is the value.
In your example, make tb an instance variable, and change the attributed directly.
from kivy.app import App
from kivy.lang import Builder
from kivy.uix.togglebutton import ToggleButton
from kivy.uix.boxlayout import BoxLayout
kv = """
<ColorToggle>:
color: 1, 0, 0, 1
on_state: self.color = {'normal':(1, 0, 0, 1), 'down':(1, 1, 1, 1)}[self.state]
RootLayout: # BoxLayout
orientation: 'vertical'
GridLayout:
id: grid
cols: 3
BoxLayout:
size_hint_y: None
height: 48
Button:
text: 'Toggle down'
on_release: root.toggle('down')
Button:
text: 'Toggle Normal'
on_release: root.toggle('normal')
"""
class RootLayout(BoxLayout):
def __init__(self, **kwargs):
super().__init__(**kwargs)
self.toggles = []
def on_kv_post(self, base_widget):
for i in range(30):
self.toggles.append(ColorToggle(text=f'Button {i}'))
self.ids.grid.add_widget(self.toggles[i])
def toggle(self, state):
for t in self.toggles:
t.state = state
class ColorToggle(ToggleButton):
pass
class ColorButtonApp(App):
def build(self):
return
Builder.load_string(kv)
ColorButtonApp().run()To view this discussion on the web visit https://groups.google.com/d/msgid/kivy-users/CAGf4y6xweEcndsO49%3DZLDLQ_F6BhqOkburXLoYaUra8OikjdoQ%40mail.gmail.com.
Tomaž Vodlan
Sent: Monday, August 10, 2020 12:06 PM
To: kivy-...@googlegroups.com
Subject: Re: [kivy-users] Button's attribute
So if I define button in python class under method x
def x(self):
tb = ToggleButton(text='Test Button', id = 'tog', ,color=(1, 0, 0, 1))and now I want to change the button state in method ydef y(self):self.ids.tog.state = 'normal'Is this correct?
V pon., 10. avg. 2020 20:38 je oseba Elliot Garbus <elli...@cox.net> napisala:
Yes you can change the state of the button, the same way you would change any other attribute. You can do this in kv or in any class.
Sent: Monday, August 10, 2020 10:25 AM
Sent: Sunday, August 9, 2020 10:32 PM
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