Ok, My question goes this way How Can I Animate a Label in Kivy , My apologies if this question is annoyingly way too easy :)
Here is the Label
in which I want animation. Can I have edits of the code in the comments?
Actually, I am obsessed with this script, racking my brains off to know the way to animate this thingy!! Pls Help!..
import kivy
from kivy.app import App
from kivy.uix.label import Label
class MyApp(App):
def build(self):
lu = Label(text = "This is a label! Pls help me with Animation!")
return lu
if __name__ == '__main__':
MyApp().run()
If you want to update text on Label
every few seconds then you can use Clock and Clock.schedule_interval(function_name, seconds)
to execute function_name(dt)
every seconds
and in this function you should change text in Label
Minimal example which displays current time.
from kivy.app import App
from kivy.uix.label import Label
from kivy.clock import Clock
import datetime
def update_label(dt):
new_text = datetime.datetime.now().strftime('%H:%M:%S')
label.text = new_text
#print(new_text)
label = None # create global variable to access the same `label` in two different functions
class MyApp(App):
def build(self):
global label # inform function to assign `Label` to global variable
label = Label(text="???")
Clock.schedule_interval(update_label, 1)
return label
#Clock.schedule_interval(update_label, 1)
if __name__ == '__main__':
MyApp().run()
EDIT:
Another example which scroll text
from kivy.app import App
from kivy.uix.label import Label
from kivy.clock import Clock
import datetime
label = None
text = 'Hello World of Python!'
text_length = len(text)
index = 0
temp_text = text + ' ' + text
def update_label(dt):
global index
label.text = temp_text[index:index+15]
index += 1
if index >= text_length:
index = 0
class MyApp(App):
def build(self):
global label
label = Label(text="???")
Clock.schedule_interval(update_label, 0.20)
return label
if __name__ == '__main__':
MyApp().run()
EDIT:
For numerical values you can use Animation .
Here is blinking text.
It changes color to black
(in 0.2 second) and next it change back to white
(in 0.2 second). And it repeats it.
from kivy.app import App
from kivy.uix.label import Label
from kivy.animation import Animation
class MyApp(App):
def build(self):
label = Label(text='Hello World of Python!')
anim = Animation(color=(0, 0, 0, 1), duration=.2) + Animation(color=(1, 1, 1, 1), duration=.2)
anim.repeat = True
anim.start(label)
return label
if __name__ == '__main__':
MyApp().run()
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