Hello i'm relatively new to python and kivy and I've been looking around but i cant quite find the answer, i'm trying to make a hub where I can display live data from my rasberry-pi. I made a clock widget using a Label, and it updates time, but when i try to add my CPU usage only one label shows up. I thought the widgets might be covering each other but I used size_hint and it wont help. When i run the code below, only the timex will show up and only if i delete the Clock.schedule_interval(display32.timex, (1)) will the *updatex * display.
Thanks alot for the help
from kivy.app import App
from kivy.uix.label import Label
from kivy.clock import Clock
from kivy.uix.floatlayout import FloatLayout
import psutil
from kivy.lang import Builder
import time
class Display(Label, FloatLayout):
def __init__(self):
super(Display, self).__init__()
def updatex(self, *args):
self.cpu2 = psutil.cpu_percent()
self.text=str(self.cpu2)
self.size_hint=(.5, .25)
self.pos=(500, 500)
self.texture_size=(0.1,0.1)
def timex(self, *args):
self.time2 = time.asctime()
self.text = str(self.time2)
self.size_hint = (.5, .25)
self.pos = (30, 500)
self.size_hint=(0.1,0.1)
class TimeApp(App):
def build(self):
display32 = Display()
Clock.schedule_interval(display32.updatex, (1))
Clock.schedule_interval(display32.timex, (1))
return display32
if __name__ == "__main__":
TimeApp().run()
Instead of passing both labels to the clock, you can define a widget, add both labels and start the clock on the widget.
from kivy.app import App
from kivy.uix.widget import Widget
from kivy.uix.label import Label
from kivy.clock import Clock
import psutil
import time
class Display(Widget):
def draw(self, *args):
self.clear_widgets()
self.add_widget(Label(text=str(psutil.cpu_percent()), pos=(500, 500)))
self.add_widget(Label(text=str(time.asctime()), pos=(30, 500)))
class TimeApp(App):
def build(self):
display32 = Display()
Clock.schedule_interval(display32.draw, 1)
return display32
if __name__ == '__main__':
TimeApp().run()
Related
What I want to do is take input from kivy.uix.textinput.TextInput() and show it on the screen.
I am new to gui Programming and I think it is an easy task.
import kivy
from kivy.app import App
from kivy.uix.label import Label
from kivy.uix.button import Button
from kivy.uix.floatlayout import FloatLayout
from kivy.uix.textinput import TextInput
class MyWindowApp(App):
def __init__(self):
super(MyWindowApp, self).__init__()
self.lbl = Label(text='Read Me!')
self.inp = TextInput(multiline=False,
size_hint =(1, 0.05),
pos_hint = {"x":0, "y":0.05})
def build(self):
self.inp.bind(on_text_validate=self.on_enter)
#self.bt1.bind(on_press=self.clk)
layout = FloatLayout()
layout.orientation = 'vertical'
layout.add_widget(self.lbl)
layout.add_widget(self.inp)
return layout
def on_enter(self,value):
print(value)
def clk(self, obj):
print ('input')
x = input()
self.lbl.text = x
window = MyWindowApp()
window.run()
when i run the code, I get the regular output output.
when I type say "hello world" in the textbox, this is the output:
<kivy.uix.textinput.TextInput object at 0x03F5AE30>
I do not get what I typed.
please suggest what should I do
Modify the following ...
def on_enter(self, value):
print(value.text)
from kivy.uix.button import Button
from kivy.uix.behaviors.button import ButtonBehavior
from kivy.uix.floatlayout import FloatLayout
from kivy.uix.image import Image
from kivy.uix.screenmanager import ScreenManager, Screen
from kivy.clock import Clock
from kivy.uix.widget import Widget
from kivy.graphics import BorderImage
from kivy.graphics import Color, RoundedRectangle, Rectangle, Triangle
from kivy.core.window import Window
#from kivy.config import Config
from kivy.uix.checkbox import CheckBox
from kivy.uix.popup import Popup
from kivy.uix.scrollview import ScrollView
from kivy.uix.filechooser import FileChooserListView
from kivy.properties import ObjectProperty
class OpeningPage(FloatLayout):
def __init__(self, **kwargs):
super().__init__(**kwargs)
self.but = RoButton(text = 'START', pos = (350,100), font_size=14, size=(100,60), size_hint=(None,None))
self.add_widget(self.but)
class RoButton(Button):
butt = ObjectProperty()
def __init__(self, **kwargs):
super(RoButton, self).__init__(**kwargs)
text = self.text
with self.canvas:
# Color(1., 0, 0)
self.butt = RoundedRectangle( size= self.size, pos = self.pos, radius =[400])
class UI(App):
def build(self):
self.screen_manager = ScreenManager()
self.opening_page = OpeningPage()
screen = Screen(name ='Opening_Page')
screen.add_widget(self.opening_page)
self.screen_manager.add_widget(screen)
return self.screen_manager
if __name__ == '__main__':
the_app = UI()
the_app.run()
Everytime I try to make a circular button using this code I get a box behind the circle. I tried doing self.canvas.before but still no luck if possible could answers be in python rather than .kv language thanks.
Attached image of problem]1
The box you see is the normal Button image. If you don't want that, probably don't use a Button, instead use class RoButton(ButtonBehavior, Widget):.
I'm trying to remove an Image widget after its animation is complete.
So far I have managed to animate the widget and then call the animation_complete method after the animation ends. Unfortunately, the widget is not removed.
What am I doing wrong?
class ShootButton(Widget):
def bullet_fly(self):
def animation_complete(animation, widget):
print "removing animation"
self.remove_widget(widget=bullet1)
with self.canvas:
bullet1 = Image(source='bullet.png', pos = (100,200))
animation1 = Animation(pos=(200, 300))
animation1.start(bullet1)
animation1.bind(on_complete=animation_complete)
You do not have to use the canvas to add an animation but add the widget directly using add_widget() and then remove it with remove_widget(). In your initial case bullet1 is not the children of ShootButton.
from kivy.app import App
from kivy.core.window import Window
from kivy.uix.image import Image
from kivy.uix.widget import Widget
from kivy.animation import Animation
Window.size = (360, 640)
class ShootButton(Widget):
def bullet_fly(self):
def animation_complete(animation, widget):
self.remove_widget(widget)
bullet1 = Image(source='bullet.png', pos = (100,200))
self.add_widget(bullet1)
animation1 = Animation(pos=(200, 300))
animation1.start(bullet1)
animation1.bind(on_complete=animation_complete)
class MyApp(App):
def build(self):
button = ShootButton()
button.bullet_fly()
return button
if __name__ == '__main__':
MyApp().run()
I'm having issues with parsing a data structure to a widget in Kivy, which would then access the structure and be able to show a value on the screen be updated continuously via a clock interval (not sure of a better to do this yet).
I have highlighted the issues in the (non-working) code below:
main.py
from kivy.app import App
from test import TestWidget
class TestApp(App):
def build(self):
testStructTable = {'randomVal1': 1, 'testVal': 2, 'randomVal2': 3}
# Issue here parsing the table like this?
return TestWidget(testStructTable)
if __name__ == '__main__':
TestApp().run()
test.py
from kivy.lang import Builder
from kivy.uix.screenmanager import ScreenManager, Screen
from kivy.uix.relativelayout import RelativeLayout
from kivy.properties import NumericProperty
class TestWidget(RelativeLayout):
def __init__(self, testStructTable, **kwargs):
super(TestWidget, self).__init__(**kwargs)
Builder.load_file('test.kv')
sm = ScreenManager()
sm.add_widget(MainScreen(name='MainScreen'))
self.add_widget(sm)
# Error accessing the table
print self.testStructTable
# Have the update_test_val continuously called
#Clock.schedule_interval(MainScreen.update_test_val(testStructTable), 1 / 60)
class MainScreen(Screen):
def __init__(self, **kwargs):
testVal = NumericProperty(0)
def update_test_val(self, testStructTable):
# Get testVal from testStructTable
# Something like:
# self.testVal = testStructTable.testVal + 1 ?
self.testVal = self.testVal + 1
test.kv
<MainScreen>:
FloatLayout:
Label:
text: str(root.testVal)
font_size: 80
My aim is to have the testVal constantly updating on the screen by accessing that data structure, however I am currently unable to achieve this, can you please advise?
In your __init__ method you're passing testStructTable and then you're trying to access self.testStructTable which does not exist untill you explicitly make an assignment:
from kivy.app import App
from kivy.lang import Builder
from kivy.uix.screenmanager import ScreenManager, Screen
from kivy.uix.relativelayout import RelativeLayout
from kivy.properties import NumericProperty
class TestWidget(RelativeLayout):
def __init__(self, testStructTable, **kwargs):
super(TestWidget, self).__init__(**kwargs)
print(testStructTable)
self.testStructTable = testStructTable
print(self.testStructTable)
class TestApp(App):
def build(self):
testStructTable = {'randomVal1': 1, 'testVal': 2, 'randomVal2': 3}
# Issue here parsing the table like this?
return TestWidget(testStructTable)
if __name__ == '__main__':
TestApp().run()
So I want to build a kivy program that basically just countdown a certain minutes and seconds.
this is how far I have come:
from kivy.app import App
from kivy.uix.label import Label
from kivy.clock import Clock
from datetime import datetime, date, time
class IncrediblyCrudeClock(Label):
a = time(0, 1, 1)
def update(self, *args):
self.text = str(self.a)
print(str(self.a))
self.a = datetime.combine(date.today(), self.a) - datetime.combine(date.today(), time(0,0,1))
class TimeApp(App):
def build(self):
crudeclock = IncrediblyCrudeClock()
Clock.schedule_interval(crudeclock.update, 1)
return crudeclock
if __name__ == "__main__":
TimeApp().run()
the problem is that when I try to deduct the old time from the new time, sothat I have 1 second less displayed, I get the following error:
self.a = datetime.combine(date.today(), self.a) datetime.combine(date.today(), time(0,0,1))
TypeError: combine() argument 2 must be datetime.time, not datetime.timedelta
this makes me think that, after the first sustraction, a is now not a "time" object anymore, but a "timedelta" wich unfortunatly can not be deducted.
any help would be great!
There is a simpler approach if you just need a countdown. You can use kivy's Animation class which is described very nicely by #inclement on youtube.
So here's the code (main.py and time.kv):
main.py
from kivy.app import App
from kivy.uix.label import Label
from kivy.animation import Animation
from kivy.properties import StringProperty, NumericProperty
class IncrediblyCrudeClock(Label):
a = NumericProperty(5) # seconds
def start(self):
Animation.cancel_all(self) # stop any current animations
self.anim = Animation(a=0, duration=self.a)
def finish_callback(animation, incr_crude_clock):
incr_crude_clock.text = "FINISHED"
self.anim.bind(on_complete=finish_callback)
self.anim.start(self)
class TimeApp(App):
def build(self):
crudeclock = IncrediblyCrudeClock()
crudeclock.start()
return crudeclock
if __name__ == "__main__":
TimeApp().run()
time.kv
<IncrediblyCrudeClock>
text: str(round(self.a, 1))
Enjoy! :)
Update:
The OP requested a solution without a kv-file -- so here is one:
from kivy.app import App
from kivy.uix.label import Label
from kivy.animation import Animation
from kivy.properties import StringProperty, NumericProperty
class IncrediblyCrudeClock(Label):
a = NumericProperty(5) # seconds
def start(self):
Animation.cancel_all(self) # stop any current animations
self.anim = Animation(a=0, duration=self.a)
def finish_callback(animation, incr_crude_clock):
incr_crude_clock.text = "FINISHED"
self.anim.bind(on_complete=finish_callback)
self.anim.start(self)
def on_a(self, instance, value):
self.text = str(round(value, 1))
class TimeApp(App):
def build(self):
crudeclock = IncrediblyCrudeClock()
crudeclock.start()
return crudeclock
if __name__ == "__main__":
TimeApp().run()