I created a very simple GUI using Kivy which reads a CSV file and populates spinners with the data.
I would like once the spinner has been clicked, it will update the images that are beneath the spinner (using bind).
However, when I call the method updateImages it seems like nothing happens.
I looked at the following question and it seems like I did exactly the same however nothing happens.
How to get value outside function using python and kivy
Any help, please?
from kivy.uix.label import Label
from kivy.uix.spinner import Spinner
from kivy.uix.image import Image
from kivy.uix.floatlayout import FloatLayout
from kivy.app import App
import pandas as pd
class GUI():
def loadData(self):
self.data = pd.read_csv('data.csv')
self.SValues = range(
min(self.data['sValue']), max(self.data['sValue']))
def updateImage(self, spinner, text):
for statue in self.SValues:
print(self.spinnerObject[statue])
try:
currLink = list(
self.data['Link'][self.data['Name'] == self.spinnerObject[statue].text])[0]
self.imageObject[statue] = Image(source=currLink)
self.imageObject[statue].size_hint = (
1/len(self.SValues), 0.1)
self.imageObject[statue].pos_hint = {
'x': (statue-1)/len(self.SValues), 'y': 0.6}
self.s_layout.add_widget(self.imageObject[statue])
except:
print('cant load image')
def initializeScreen(self):
self.spinnerObject = {}
self.imageObject = {}
self.s_layout = FloatLayout()
self.complete_layout = FloatLayout()
for statue in self.SValues:
self.spinnerObject[statue] = Spinner(text='sValue %d' % statue, values=list(
self.data['Name'][self.data['sValue'] == statue].values))
self.spinnerObject[statue].size_hint = (1/len(self.SValues), 0.1)
self.spinnerObject[statue].pos_hint = {
'x': (statue-1)/len(self.SValues), 'y': 0.7}
self.spinnerObject[statue].bind(text=self.updateImage)
self.s_layout.add_widget(self.spinnerObject[statue])
self.complete_layout.add_widget(self.s_layout)
return self.complete_layout
class MainApp(App):
def build(self):
gui = GUI()
gui.loadData()
layout = gui.initializeScreen()
return layout
if __name__ == '__main__':
MainApp().run()
Related
I am newbies to programming, just picking up python. I have a very simple program which is showing a popup message, and it seems OK:
from kivy.app import App
from kivy.uix.button import Button
from kivy.uix.label import Label
from kivy.uix.floatlayout import FloatLayout
from kivy.uix.popup import Popup
class t6App(App):
def build(self):
lb = Label(text="Welcome Here",size_hint=(1,0.8),pos_hint={'left':1,'top':1})
bt = Button(text="Press Me", size_hint=(1,0.1),pos_hint={'left':1,'x':0})
fl = FloatLayout()
fl.add_widget(lb)
fl.add_widget(bt)
cp = Popup(title='Guys', content=fl)
return cp
t6App().run()
Then I wanted to modify it, and add more things to it, the popup didn't show then: (2 programs always the same)
from kivy.app import App
from kivy.uix.button import Button
from kivy.uix.label import Label
from kivy.uix.floatlayout import FloatLayout
from kivy.uix.popup import Popup
class CustPop(Popup):
def build(self):
lb = Label(text="Welcome Here",size_hint=(1,0.8),pos_hint={'left':1,'top':1})
bt = Button(text="Press Me", size_hint=(1,0.1),pos_hint={'left':1,'x':0})
fl = FloatLayout()
fl.add_widget(lb)
fl.add_widget(bt)
cp = Popup(title='Guys', content=fl)
return cp
class t6App(App):
def build(self):
cp1 = CustPop()
return cp1
t6App().run()
The codes do run, but it seems like the layout /button /label in CustPop() can't be accessed (became a blank popup). My question is why and how to make it work?
Thx guys. I am appreciated.
You have defined a build() method in your CustPop, but unlike the App class, that build() method is not automatically called. You should put that code (with a couple minor changes) in the __init__() method.
class CustPop(Popup):
def __init__(self, **kwargs):
super(CustPop, self).__init__(**kwargs)
lb = Label(text="Welcome Here", size_hint=(1, 0.8), pos_hint={'left': 1, 'top': 1})
bt = Button(text="Press Me", size_hint=(1, 0.1), pos_hint={'left': 1, 'x': 0})
fl = FloatLayout()
fl.add_widget(lb)
fl.add_widget(bt)
# cp = Popup(title='Guys', content=fl)
self.title = 'Guys'
self.content = fl
from kivy.app import App
from kivy.uix.boxlayout import BoxLayout
from kivy.uix.label import Label
from kivy.core.window import Window
from kivy.uix.scrollview import ScrollView
from kivy.effects.scroll import ScrollEffect
from kivy.uix.widget import Widget
from kivy.uix.button import Button
class BSGameMain:
def sas(self):
# blmain.remove_widget(scrlFBtns)
self.scrlFBtns.remove_widget(blbtns)
blmain = BoxLayout(orientation = 'vertical') # MainBoxLayout init
scrlFBtns = ScrollView(effect_cls = 'ScrollEffect')
blbtns = BoxLayout(
orientation = 'vertical',
size_hint_y = None
) # BoxLayout for buttons
blbtns.bind(minimum_height = blbtns.setter('height'))
scrlFBtns.add_widget(blbtns)
for i in range (2):
blbtns.add_widget(Button(
text='asd',
size_hint_y = None,
height = 40,
on_press = sas
))
lblmain = Label(text = 'asd')
blmain.add_widget(lblmain)
blmain.add_widget(scrlFBtns)
class BSApp(App):
def build(self):
game = BSGameMain()
return game.blmain
if __name__ == "__main__":
BSApp().run()
AttributeError 'Button' object has no attribute scrlFBtn. What is the problem? I'm trying to make it so that when you clicked, the screen was cleared (Widget was deleted). Рelp me please =)
Your code has several errors and bad programming practices:
if you declare variables that are inside a class and outside any method of the class will be class variables and not attributes of the class, so it is not a good practice to do so if you want to use later self, all that code must be within a method of a class.
on_someproperty wait as parameter a function that receives parameters, in your case sas() does not receive them so the solution is to use a lambda method.
from kivy.app import App
from kivy.uix.boxlayout import BoxLayout
from kivy.uix.label import Label
from kivy.uix.scrollview import ScrollView
from kivy.effects.scroll import ScrollEffect
from kivy.uix.button import Button
class BSGameMain:
def __init__(self):
self.blmain = BoxLayout(orientation = 'vertical') # MainBoxLayout init
self.scrlFBtns = ScrollView(effect_cls = 'ScrollEffect')
self.blbtns = BoxLayout(
orientation = 'vertical',
size_hint_y = None )
self.blbtns.bind(minimum_height = self.blbtns.setter('height'))
self.scrlFBtns.add_widget(self.blbtns)
for i in range(2):
self.blbtns.add_widget(Button(
text='asd',
size_hint_y = None,
height = 40,
on_press = lambda *args: self.sas()))
lblmain = Label(text = 'asd')
self.blmain.add_widget(lblmain)
self.blmain.add_widget(self.scrlFBtns)
def sas(self):
self.scrlFBtns.remove_widget(self.blbtns)
class BSApp(App):
def build(self):
game = BSGameMain()
return game.blmain
if __name__ == "__main__":
BSApp().run()
I am trying to build an app that downloads a file, whose progress can be tracked on a kivy app.
I have looked at the example here and here for the download progress.
This is my code:
from kivy.app import App
from kivy.uix.button import Button
from kivy.uix.boxlayout import BoxLayout
from kivy.uix.label import Label
from kivy.uix.textinput import TextInput
from kivy.uix.popup import Popup
from kivy.factory import Factory
from kivy.properties import ObjectProperty
from kivy.clock import Clock
import urllib
URL = "http://s9.videozoo.me/S/saenai_heroine_no_sodatekata_flat_-_11.mp4?st=Ow7pwXbRt6vPWE-kr5Sn1A&e=1498847899&start=0"
class PopupBox(Popup):
pop_up_text = ObjectProperty()
def update_pop_up_text(self, p_message):
self.pop_up_text.text = p_message
class MyApp(App):
# layout
def show_popup(self):
self.pop_up = Factory.PopupBox()
self.pop_up.update_pop_up_text('Running some task...')
self.pop_up.open()
def build(self):
layout = BoxLayout(padding=10, orientation='vertical')
btn1 = Button(text="OK")
btn1.bind(on_press=self.buttonClicked)
layout.add_widget(btn1)
self.lbl1 = Label(text="test")
layout.add_widget(self.lbl1)
self.txt1 = TextInput(text='', multiline=False)
layout.add_widget(self.txt1)
return layout
# button click function
def buttonClicked(self, btn):
self.lbl1.text = "You wrote " + self.txt1.text
self.show_popup()
self.download_file(URL)
self.pop_up.dismiss()
def download_file(self, url):
u = urllib.request.urlopen(url)
meta = u.info()
metaInfo = str(meta).split()
fileTotalbytes = int(metaInfo[46])
data_blocks = []
total = 0
while True:
block = u.read(1024)
data_blocks.append(block)
total += len(block)
hash = ((60 * total) // fileTotalbytes)
print("[{}{}] {}%".format('#' * hash, ' ' * (60 - hash), int(total / fileTotalbytes * 100)), end="\r")
if not len(block):
break
data = b''.join(data_blocks) # had to add b because I was joining bytes not strings
u.close()
# run app
if __name__ == "__main__":
MyApp().run()
However, I am confused as to how do I bind the download_file function with the kivy widget functionality so as to make it work. How do I appropriately modify the print function so as to make it work with the widget
If you block in the mainthread kivy can no longer update the GUI. Instead create a new thread and use the #mainthread annotation to do gui updates.
Instead of the print you have to manipulate kivy widgets. You could create a rectangle and increase the width to 100%. You could create a textinput and output your text there.
I am writing code for a heating control system.
I just want to be able to change the label texts FROM WITHIN PYTHON.
By that I mean, NOT in the GUI code, but somewhere else in the main.
Here is my MWE:
import time
from kivy.app import App
from kivy.uix.button import Button
from kivy.uix.label import Label
from kivy.uix.widget import Widget
from kivy.uix.boxlayout import BoxLayout
import multiprocessing
from kivy.properties import StringProperty
class Data (Widget):
top = StringProperty('hiii')
def __init__(self, **kwargs):
super(Widget, self).__init__(**kwargs)
global mydata
mydata=Data()
class myw (BoxLayout):
def __init__(self, **kwargs):
super(myw, self).__init__(**kwargs)
VERT = BoxLayout(orientation='vertical')
o = Label(text='Oben: ',
font_size=120)
m = Label(text='Mitte: ',
font_size=120)
u = Label(text='Unten: ',
font_size=120)
a = Label(text='Aussen: ',
font_size=120)
mydata.bind(top=o.setter('text'))
VERT.add_widget(o)
VERT.add_widget(m)
VERT.add_widget(u)
VERT.add_widget(a)
onoff = Button(text='Ein',
font_size=120,
size_hint=(0.3, 1))
self.add_widget(VERT)
self.add_widget(onoff)
class TutorialApp(App):
def build(self):
return myw()
if __name__ == "__main__":
try:
global myapp
myapp=TutorialApp()
app_runner=multiprocessing.Process(target=myapp.run)
app_runner.start()
time.sleep(3)
mydata.top='new value assigned'
print (mydata.top)
time.sleep(5)
app_runner.terminate()
except Exception as e:
print ('error occured', e)
I deliberately declared the variable 'mydata' outside the kivy code, such that i can access it from elsewhere in the code (not shown here).
Using threading instead of multiprocessing solved the problem.
So instead of
app_runner=multiprocessing.Process(target=myapp.run)
it now reads:
app_runner=threading.Thread(target=myapp.run)
This seems like a pretty simple issue but I just can't figure it out. I'm using Kivy with Python 2.7. How do I call the NewFunction() function from inside build(self)?
from kivy.core.window import Window
Window.clearcolor = (1, 1, 1, 1)
from kivy.app import App
from kivy.uix.button import Button
from kivy.uix.label import Label
from kivy.uix.anchorlayout import AnchorLayout
class TestApp(App):
def build(self):
anchor_layout = AnchorLayout(anchor_x='center', anchor_y='top')
lblInitiate = Label(text='[color=1f358e][font=tahoma]Hello World[/color][/font]', markup = True, font_size='20sp')
lblInitiate.size_hint = (0.1, 0.1)
anchor_layout.add_widget(lblInitiate)
return anchor_layout
NewFunction()
def NewFunction():
lblOne = Label(text="[color=1f358e]Test[/color]")
return lblOne
if __name__ == '__main__':
TestApp().run()
Just do:
self.NewFunction()
but note that you need to declare NewFunction like this:
def NewFunction(self): <--- self
as it's a method of your class.