Simple question, how can i divide two numbers from a single InputBox? I have no idea, example, i have only one inputbox and i write two numbers "40 10" how can i divide automatically this? Here the code:
import kivy
from kivy.app import App
from kivy.uix.gridlayout import GridLayout
from kivy.uix.label import Label
from kivy.uix.textinput import TextInput
from kivy.uix.button import Button
from kivy.uix.popup import Popup
from kivy.uix.boxlayout import BoxLayout
from kivy.uix.listview import ListView
class Widget(GridLayout):
def __init__(self, **kwargs):
super(Widget, self) .__init__(**kwargs)
self.cols = 2
self.add_widget(Label(text="RPM"))
self.rpm = TextInput(multiline=False)
self.add_widget(self.rpm)
btn1 = Button(text="Division:")
btn1.bind(on_press=self.buttonClicked)
self.add_widget(btn1)
Example of what i need:
def buttonClicked(self, btn):
self.rpm.text(first input / second input)
x = self.rpm.text
popup = Popup(title='Result', content=x, size_hint=(None,
None), size=(500, 90))
popup.open()
The procedure is the next:
Get the text from TextInput
Separate it by the space
Verify that only 2 terms exist
Convert it to float, so an error may appear, exceptions must be used.
And for the last one we establish the popup with a Label that contains the text.
import kivy
kivy.require("1.0.6")
from kivy.app import App
from kivy.uix.gridlayout import GridLayout
from kivy.uix.label import Label
from kivy.uix.textinput import TextInput
from kivy.uix.button import Button
from kivy.uix.popup import Popup
class Widget(GridLayout):
def __init__(self, **kwargs):
super(Widget, self) .__init__(**kwargs)
self.cols = 2
self.add_widget(Label(text="RPM"))
self.rpm = TextInput(multiline=False)
self.add_widget(self.rpm)
btn1 = Button(text="Division:")
btn1.bind(on_press=self.buttonClicked)
self.add_widget(btn1)
def buttonClicked(self, btn):
texts = self.rpm.text.split()
if len(texts) == 2:
try:
x, y = map(float, texts)
res = x/y
popup = Popup(title='Result', content=Label(text=str(res)), size_hint=(None, None), size=(500, 90))
popup.open()
except (ValueError, ZeroDivisionError):
print("error")
class TestApp(App):
def build(self):
return Widget()
if __name__ == '__main__':
TestApp().run()
This type of interfaces are few useful since the user could place anything, the appropriate thing is to validate the text while it is being written as for example to accept a certain set of characters.
Another improvement is that it is separated into 2 TextInputs.
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)
I want to create an UI with Buttons on top and a few Labels on bottom and if the labels exceeds the height it should be scrollable.
Something like this:
So far this is my code:
from kivy.app import App
from kivy.uix.button import Button
from kivy.uix.label import Label
from kivy.uix.boxlayout import BoxLayout
from kivy.uix.scrollview import ScrollView
from kivy.uix.gridlayout import GridLayout
class MyApp(App):
main_layout = BoxLayout(orientation='vertical')
top_layout = BoxLayout(orientation='horizontal')
scrollView = ScrollView()
gridLayout = GridLayout()
gridLayout.cols = 1
gridLayout.minimum_height = 10
gridLayout.padding = [0, 0, 0, 0]
scrollView.add_widget(gridLayout)
main_layout.add_widget(top_layout)
main_layout.add_widget(scrollView)
def btn_create(self, instance):
self.gridLayout.add_widget(Label(text='test'))
def btn_edit(self, instance):
pass
def btn_delete(self, instance):
pass
def build(self):
self.top_layout.size_hint=(1, .1)
# Button 'Erstellen'
btnCreate = Button()
btnCreate.text = 'Erstellen'
btnCreate.bind(on_press=self.btn_create)
# Button 'Bearbeiten'
btnEdit = Button()
btnEdit.text = 'Bearbeiten'
btnEdit.bind(on_press=self.btn_edit)
# Button 'Löschen'
btnDelete = Button()
btnDelete.text = 'Löschen'
btnDelete.bind(on_press=self.btn_delete)
self.top_layout.add_widget(btnCreate)
self.top_layout.add_widget(btnEdit)
self.top_layout.add_widget(btnDelete)
return self.main_layout
if __name__ == '__main__':
MyApp().run()
I added a GridLayout to a ScrollView, but this doesn't seem to work.
How can i make a scrollable list?
You have to set the size_hint_y of the GridLayout to None so that the height does not depend on the ScrollView and the size is minimum equal to the size of the GridLayout. On the other hand the Label must have size_hint_y to None so that the height does not depend on the GridLayout.
from kivy.app import App
from kivy.uix.button import Button
from kivy.uix.label import Label
from kivy.uix.boxlayout import BoxLayout
from kivy.uix.scrollview import ScrollView
from kivy.uix.gridlayout import GridLayout
class MyApp(App):
main_layout = BoxLayout(orientation='vertical')
top_layout = BoxLayout(orientation='horizontal')
scrollView = ScrollView()
gridLayout = GridLayout(size_hint_y=None)
gridLayout.cols = 1
gridLayout.padding = [0, 0, 0, 0]
gridLayout.bind(minimum_height=gridLayout.setter('height'))
scrollView.add_widget(gridLayout)
main_layout.add_widget(top_layout)
main_layout.add_widget(scrollView)
def btn_create(self, instance):
self.gridLayout.add_widget(Label(text='test', size_hint_y=None))
def btn_edit(self, instance):
pass
def btn_delete(self, instance):
pass
def build(self):
self.top_layout.size_hint=(1, .1)
# Button 'Erstellen'
btnCreate = Button()
btnCreate.text = 'Erstellen'
btnCreate.bind(on_press=self.btn_create)
# Button 'Bearbeiten'
btnEdit = Button()
btnEdit.text = 'Bearbeiten'
btnEdit.bind(on_press=self.btn_edit)
# Button 'Löschen'
btnDelete = Button()
btnDelete.text = 'Löschen'
btnDelete.bind(on_press=self.btn_delete)
self.top_layout.add_widget(btnCreate)
self.top_layout.add_widget(btnEdit)
self.top_layout.add_widget(btnDelete)
return self.main_layout
if __name__ == '__main__':
MyApp().run()
I am using kivy as my GUI tools for my python program.
when I want to create a table,in which there is a column containing dropdown list to make select value easier.
However, I can not make it works correctly.
The following is my code.
import kivy
kivy.require('1.10.0')
from kivy.app import App
from kivy.uix.label import Label
from kivy.uix.button import Button
from kivy.uix.dropdown import DropDown
from kivy.uix.gridlayout import GridLayout
sel =["A","B","C"]
class MyGrid(GridLayout):
def __init__(self, **kwargs):
super(MyGrid, self).__init__(**kwargs)
self.redraw()
def redraw(self):
self.clear_widgets()
self.rows = 5
self.cols =2
for i in range(5):
label = Label(text="cell"+str(i+1))
self.add_widget(label)
drpName = DropDown()
btnName = Button(text="B",size_hint=(None, None))
for e in sel:
btn=Button(text=e, size_hint_y=None, height=btnName.height)
btn.bind(on_release=lambda btn:drpName.select(btn.text))
drpName.add_widget(btn)
btnName.bind(on_release=drpName.open)
drpName.bind(on_select=lambda instance, x: setattr(btnName, 'text', x))
self.add_widget(btnName)
class testApp(App):
def build(self):
return MyGrid()
if __name__=="__main__":
testApp().run()
Only a part of button open the pull down list and all of the selected value will replace the text of last button.
Could you help me out. Thanks in advance.
After reading post Python Lambda in a loop[Building Dropdowns Dynamically in Kivy, I can make my program works.
Thanks for valuable post.
import kivy
kivy.require('1.10.0')
from kivy.app import App
from kivy.uix.label import Label
from kivy.uix.button import Button
from kivy.uix.dropdown import DropDown
from kivy.uix.gridlayout import GridLayout
sel =["A","B","C"]
class MyGrid(GridLayout):
def __init__(self, **kwargs):
super(MyGrid, self).__init__(**kwargs)
self.redraw()
def redraw(self):
self.clear_widgets()
self.rows = 5
self.cols =2
drpName = []
for i in range(5):
label = Label(text="cell"+str(i+1))
self.add_widget(label)
drpName.append(DropDown())
btnName=Button(text="B",size_hint=(None, None))
for e in sel:
btn=Button(text=e, size_hint_y=None, height=btnName.height)
btn.bind(on_release=lambda btn=btn,dropdown=drpName[i]:dropdown.select(btn.text))
drpName[i].add_widget(btn)
btnName.bind(on_release=drpName[i].open)
drpName[i].bind(on_select=lambda instance, x,btn=btnName: setattr(btn, 'text', x))
self.add_widget(btnName)
class testApp(App):
def build(self):
return MyGrid()
if __name__=="__main__":
testApp().run()
My problem is in accessing container property of DropDown, which is a GridLayout by default and contains it's children.
Simple app:
from kivy.app import App
from kivy.uix.boxlayout import BoxLayout
from kivy.uix.dropdown import DropDown
from kivy.uix.button import Button
from kivy.uix.label import Label
class TestApp(App):
def build(self):
root = BoxLayout(orientation='vertical')
dropdown = DropDown()
for i in range(3):
dropdown.add_widget(Button(
text=str(i),
size_hint_y=None
)) # add 3 buttons to dropdown
dropdown.container.bind(spacing=8) # this line does not work
dropdown_button = Button(size_hint_y=.2, text='Open DropDown')
dropdown_button.bind(on_release=dropdown.open)
root.add_widget(dropdown_button)
root.add_widget(Label()) # empty space under button
return root
TestApp().run()
I tried using bind method for this, but there is no result. No indentation is set. I also would like to see the solution in kivy language because I want to use dp() function for setting spacing and it's not very convenient to pass the parameter to python file for this. Thanks in advance for any help.
Instead using bind you should just set the value directly:
from kivy.app import App
from kivy.uix.boxlayout import BoxLayout
from kivy.uix.dropdown import DropDown
from kivy.uix.button import Button
from kivy.uix.widget import Widget
class TestApp(App):
def build(self):
root = BoxLayout(orientation='vertical')
dropdown = DropDown()
for i in range(3):
dropdown.add_widget(Button(
text=str(i),
size_hint_y=None
)) # add 3 buttons to dropdown
dropdown.container.spacing = 10
dropdown.container.padding = (0, 10, 0, 0)
dropdown_button = Button(size_hint_y=.2, text='Open DropDown')
dropdown_button.bind(on_release=dropdown.open)
root.add_widget(dropdown_button)
root.add_widget(Widget()) # empty space under button
return root
TestApp().run()
Using a custom container class is not supported directly. You can do it like this, but its hacky and ugly:
from kivy.app import App
from kivy.uix.boxlayout import BoxLayout
from kivy.uix.gridlayout import GridLayout
from kivy.uix.dropdown import DropDown
from kivy.uix.button import Button
from kivy.uix.widget import Widget
from kivy.lang import Builder
Builder.load_string('''
<MyContainer>:
# copied from kivy.uix.dropdown._grid_kv
size_hint_y: None
height: self.minimum_size[1]
cols: 1
# custom settings
spacing: 10
padding: (0, 10, 0, 0)
''')
class MyContainer(GridLayout):
pass
class TestApp(App):
def build(self):
root = BoxLayout(orientation='vertical')
container = MyContainer()
dropdown = DropDown(container=container)
super(DropDown, dropdown).add_widget(container)
dropdown.on_container(dropdown, container)
for i in range(3):
dropdown.add_widget(Button(
text=str(i),
size_hint_y=None
)) # add 3 buttons to dropdown
dropdown_button = Button(size_hint_y=.2, text='Open DropDown')
dropdown_button.bind(on_release=dropdown.open)
root.add_widget(dropdown_button)
root.add_widget(Widget()) # empty space under button
return root
TestApp().run()
So I'd say it'd more clean to make custom spacing class as a subclass of Widget to fill space between buttons:
from kivy.app import App
from kivy.uix.boxlayout import BoxLayout
from kivy.uix.dropdown import DropDown
from kivy.uix.button import Button
from kivy.uix.widget import Widget
from kivy.lang import Builder
Builder.load_string('''
<DropDownSpacing>:
size_hint_y: None
height: 20
''')
class DropDownSpacing(Widget):
pass
class TestApp(App):
def build(self):
root = BoxLayout(orientation='vertical')
dropdown = DropDown()
for i in range(3):
dropdown.add_widget(DropDownSpacing())
dropdown.add_widget(Button(
text=str(i),
size_hint_y=None
)) # add 3 buttons to dropdown
dropdown_button = Button(size_hint_y=.2, text='Open DropDown')
dropdown_button.bind(on_release=dropdown.open)
root.add_widget(dropdown_button)
root.add_widget(Widget()) # empty space under button
return root
TestApp().run()
This is the same you're doing in your main BoxLayout, except I prefer to use Widget class directly instead of Label with no text.
I am trying to learn how to create application in Kivy and I have problem with sending argument to the function. I want to send text from input to the function and print it. Can somebody tell me how can I do it ?
from kivy.app import App
from kivy.uix.boxlayout import BoxLayout
from kivy.uix.textinput import TextInput
from kivy.uix.button import Button
class TutorialApp(App):
def gratulation(self, *args):
print args
def build(self):
boxLayout = BoxLayout(spacing=10,orientation='vertical')
g = TextInput(text='Enter gratulation',
multiline=False,
font_size=20,
height=100)
button = Button(text='Send')
button.bind(on_press=self.gratulation)
boxLayout.add_widget(g)
boxLayout.add_widget(button)
return boxLayout
if __name__ == "__main__":
TutorialApp().run()
Yo must get the text from "g" and then send it to the button callback, there is 2 ways of doing this, by a lambda function, or calling your class method aplying to it.
Lambda Version:
from __future__ import print_function ##Need to import this for calling print inside lambda
def build(self):
boxLayout = BoxLayout(spacing=10,orientation='vertical')
g = TextInput(text='Enter gratulation',
multiline=False,
font_size=20,
height=100)
button = Button(text='Send')
buttoncallback = lambda:print(g.text)
button.bind(on_press=buttoncallback)
...
The partial version:
from functools import partial ##import partial, wich allows to apply arguments to functions returning a funtion with that arguments by default.
def build(self):
boxLayout = BoxLayout(spacing=10,orientation='vertical')
g = TextInput(text='Enter gratulation',
multiline=False,
font_size=20,
height=100)
button = Button(text='Send')
buttoncallback = partial(self.gratulation, g.text)
button.bind(on_press=buttoncallback)
...
One way to do it:
from kivy.app import App
from kivy.uix.boxlayout import BoxLayout
from kivy.uix.textinput import TextInput
from kivy.uix.button import Button
class TutorialApp(App):
def gratulation(self, instance):
print(self.g.text)
def build(self):
boxLayout = BoxLayout(spacing=10,orientation='vertical')
self.g = TextInput(text='Enter gratulation',
multiline=False,
font_size=20,
height=100)
button = Button(text='Send')
button.bind(on_press=self.gratulation)
boxLayout.add_widget(self.g)
boxLayout.add_widget(button)
return boxLayout
if __name__ == "__main__":
TutorialApp().run()
Hope it helps!