I have a list to display to the user but I want to break each section to a separate textinput as it will make more sense that way. I then need to be able to capture those changes and update my variable.
I need to get the variables to display correctly tlmanualreg being backgroundManualReg[0] and on closeit() store the changes back to a list.
EDIT: Updated with bare bones popup project to test variable exchanging.
from kivy.properties import StringProperty
from os.path import join, dirname
from kivy.lang import Builder
from kivy.uix.popup import Popup
from kivy.app import App
import json
Builder.load_string("""
<-MyPopup#Popup>:
tlpos:tlpos
tlmanualreg:tlmanualreg
cols: 1
GridLayout:
cols:3
Label:
text: "Location"
Label:
text: "Dist from Center (mm)"
Label:
text: "Corners of sheet (for manual-align)"
Label:
text: "Top-Left:"
TextInput:
id: tlpos
text: root.backgroundTLPOS
TextInput:
id: tlmanualreg
text: root.backgroundTLManualReg
Button:
size_hint_y:.1
text: 'Update Variables'
on_press: root.closeit()
""")
class ScreensApp(App):
def build(self):
content = MyPopup()
_popup = Popup(content=content, auto_dismiss=False)
_popup.open()
class MyPopup(Popup):
backgroundManualReg = [[551, 218], [3168, 319], [519, 1617], [3190, 1589]]
backgroundTLPOS = StringProperty("[0, 0]")
backgroundTLManualReg = StringProperty("[1,1],[2,2]")
def __init__(self, **kwargs):
super(MyPopup, self).__init__(**kwargs)
self.ids.tlmanualreg.text = str([1, 1])
self.backgroundTLManualReg = str(self.backgroundManualReg[0])
def closeit(self):
self.backgroundTLPOS = self.tlpos.text
print("backgroundTLPOS: ", self.backgroundTLPOS)
print("backgroundTLManualReg: ", self.ids.tlmanualreg.text)
print("backgroundManualReg: ", self.backgroundManualReg)
if __name__ == '__main__':
ScreensApp().run()
In the following example, we are:
Using dictionary. The key of the dictionary is use as Kivy widget's id and also as a reference to update the values.
Dynamically adding widgets as per item (key, value) in the dictionary
Retrieving data using for child in reversed(self.container.children) and isinstance(child, TextInput)
Example
main.py
from kivy.properties import StringProperty, DictProperty
from kivy.lang import Builder
from kivy.uix.popup import Popup
from kivy.app import App
from kivy.uix.textinput import TextInput
from kivy.uix.label import Label
import ast
Builder.load_string("""
<HeaderCell#Label>
text_size: self.size
halign: "left"
valign: "middle"
canvas.before:
Color:
rgba: 1, 0.502, 0, 1
Rectangle:
pos: self.pos
size: self.size
<MyPopup>:
title: 'My Popup'
container: container
GridLayout:
cols: 1
GridLayout:
cols: 3
size_hint_y: 0.1
HeaderCell:
text: "Location"
HeaderCell:
text: "Dist from Center (mm)"
HeaderCell:
text: "Corners of sheet (for manual-align)"
GridLayout:
id: container
cols:3
Button:
size_hint_y:.1
text: 'Update Variables'
on_press: root.closeit()
""")
class ScreensApp(App):
def build(self):
_popup = MyPopup(auto_dismiss=False)
_popup.open()
class MyPopup(Popup):
backgroundTLPOS = StringProperty("[0, 0]")
bgManualRegDict = DictProperty({'Top-Left': [551, 218], 'Top-Right': [3168, 319],
'Bottom-Left': [519, 1617], 'Bottom-Right': [3190, 1589]})
def __init__(self, **kwargs):
super(MyPopup, self).__init__(**kwargs)
self.populate_rows()
def populate_rows(self):
for key, value in self.bgManualRegDict.items():
location = Label(text="{}:".format(key), valign="middle")
location.bind(size=location.setter('text_size'))
bgTLpos = TextInput(text="{}".format(self.backgroundTLPOS))
bgTLmanualReg = TextInput(id="{}".format(key), text="{}".format(value))
self.container.add_widget(location)
self.container.add_widget(bgTLpos)
self.container.add_widget(bgTLmanualReg)
def closeit(self):
print("\ncloseit:")
for child in reversed(self.container.children):
if isinstance(child, TextInput):
if child.id in self.bgManualRegDict.keys():
print("\tid={0}, text={1}".format(child.id, child.text))
self.bgManualRegDict[child.id] = ast.literal_eval(child.text)
print("\n\tself.bgManualRegDict=", self.bgManualRegDict)
if __name__ == '__main__':
ScreensApp().run()
Output
Related
I am having trouble understanding how to inherit the functionality of one class into another with Kivy. I understand the error message ('LoadDialog_Directory' object has no attribute 'manager'), but I'm just not grasping exactly how to fix it. I believe I need to do something with the function below, but ultimately, I do not know.
def __init__(self, **kwargs):
super().__init__(**kwargs)
The goal of this script is to be able to select a specific driver as the path for the filechooser. I choose this method vs. others because most were using Kivy 1.11.1, this version has a lot of deprecated functions that do not work with 2.0.
.py
from kivy.app import App
from kivy.uix.screenmanager import ScreenManager, Screen
from kivy.lang.builder import Builder
from kivy.uix.spinner import SpinnerOption
from kivy.uix.popup import Popup
from kivy.uix.button import Button
from kivy.uix.boxlayout import BoxLayout
from kivy.uix.floatlayout import FloatLayout
from kivy.properties import ObjectProperty
from kivy.utils import platform
from kivy.properties import StringProperty
import os
import string
class WindowManager(ScreenManager):
pass
class MyOption(SpinnerOption):
pass
class LoadDialog_Directory(FloatLayout):
load = ObjectProperty(None)
cancel = ObjectProperty(None)
def dir_driver(self):
x = self.manager.get_screen("first")
return str(x.ids.drive_dir.text)
class FirstWindow(Screen):
def get_drives(self):
drives = ['%s:' % d for d in string.ascii_uppercase if os.path.exists('%s:' % d)]
return drives
def dismiss_popup(self):
self._popup.dismiss()
def show_load_directory(self):
content = LoadDialog_Directory(load=self.directroy_path, cancel=self.dismiss_popup)
self._popup = Popup(title="Load file", content=content, size_hint=(0.9, 0.9))
self._popup.open()
def directroy_path(self, path, filename):
self.ids.text_input_directory.text = str(filename[0])
self.dismiss_popup()
kv_main = Builder.load_file('main.kv')
#
class MyApp(App):
def build(self):
return kv_main
if __name__ == '__main__':
MyApp().run()
main.kv
#:include first.kv
WindowManager:
FirstWindow:
<LoadDialog_Directory>:
BoxLayout:
size: root.size
pos: root.pos
orientation: "vertical"
FileChooserListView:
id: filechooser
dirselect: True
path: root.dir_driver()
BoxLayout:
size_hint_y: None
height: 30
Button:
text: "Cancel"
on_release: root.cancel()
Button:
text: "Load"
on_release: root.load(filechooser.path, filechooser.selection)
first.kv
<FirstWindow>
name: 'first'
GridLayout:
cols: 1
BoxLayout:
orientation: "horizontal"
TextInput:
BoxLayout:
orientation: "horizontal"
Spinner:
id: drive_dir
text: "Root Drive"
halign: 'center'
option_cls: "MyOption"
values: root.get_drives()
Button:
text: "Set Result Directory"
on_release: root.show_load_directory()
TextInput:
id: text_input_directory
disabled: True
text: text_input_directory.text
BoxLayout:
size_hint: (0.01, 1)
orientation: "horizontal"
TextInput:
Side Note: The reason for the extra blank TextInput is because the Spinner will not function (show drivers) if it is taking too much of the App.
After a few hours of trail and error I finally got it to work, but I have no idea why it works. Here is what changed:
New variable in class LoadDialog_Directory(FloatLayout) - input_pth
Called input_pth into my content variable within class FirstWindow(Screen) function show_load_directory(self)
Set my filechooser.path to root.input_pth in the main.kv file.
I do not understand how the input_pth variable within content is able to reference the class LoadDialog_Directory(FloatLayout) without having to pass something like:
def __init__(self, input_pth, **kwargs):
super(LoadDialog_Directory, self).__init__()
self.input_pth = input_pth
.py
from kivy.app import App
from kivy.uix.screenmanager import ScreenManager, Screen
from kivy.lang.builder import Builder
from kivy.uix.spinner import SpinnerOption
from kivy.uix.popup import Popup
from kivy.uix.button import Button
from kivy.uix.boxlayout import BoxLayout
from kivy.uix.floatlayout import FloatLayout
from kivy.properties import ObjectProperty
from kivy.utils import platform
from kivy.properties import StringProperty
import os
import string
class WindowManager(ScreenManager):
pass
class MyOption(SpinnerOption):
pass
class LoadDialog_Directory(FloatLayout):
input_pth = StringProperty()
load = ObjectProperty()
cancel = ObjectProperty()
class FirstWindow(Screen):
def drive_list(self):
drives = ['%s:' % d for d in string.ascii_uppercase if os.path.exists('%s:' % d)]
return drives
def dismiss_popup(self):
self._popup.dismiss()
def show_load_directory(self):
content = LoadDialog_Directory(load=self.directroy_path, cancel=self.dismiss_popup, input_pth=self.ids.drive_dir.text)
self._popup = Popup(title="Load file", content=content, size_hint=(0.9, 0.9))
self._popup.open()
def directroy_path(self, path, filename):
self.ids.text_input_directory.text = str(filename[0])
self.dismiss_popup()
kv_main = Builder.load_file('main.kv')
#
class MyApp(App):
def build(self):
return kv_main
if __name__ == '__main__':
MyApp().run()
main.kv
#:include first.kv
WindowManager:
FirstWindow:
<LoadDialog_Directory>:
BoxLayout:
size: root.size
pos: root.pos
orientation: "vertical"
FileChooserListView:
id: filechooser
dirselect: True
path: root.input_pth
BoxLayout:
size_hint_y: None
height: 30
Button:
text: "Cancel"
on_release: root.cancel()
Button:
text: "Load"
on_release: root.load(filechooser.path, filechooser.selection)
first.kv
<FirstWindow>
name: 'first'
GridLayout:
cols: 1
BoxLayout:
orientation: "horizontal"
TextInput:
BoxLayout:
orientation: "horizontal"
Spinner:
id: drive_dir
halign: 'center'
option_cls: "MyOption"
values: root.drive_list()
Button:
text: "Set Result Directory"
on_release: root.show_load_directory()
TextInput:
id: text_input_directory
disabled: True
text: text_input_directory.text
BoxLayout:
size_hint: (0.01, 1)
orientation: "horizontal"
TextInput:
I am trying to change the text of a label using an id, I tried it with stringProperty, with objectProperty without any properties. There has to be something I am missing in my code because it simply does not work whatever I try and any help would be greatly appreciated.
This bit of code is a simple screen with 2 buttons, one for going to the other screen and one for changing the label
from kivy.app import *
from kivy.uix.button import *
from kivy.graphics import *
from kivy.uix.widget import *
from kivy.uix.label import *
from kivy.uix.floatlayout import *
from kivy.uix.boxlayout import *
from kivy.uix.relativelayout import *
from kivy.uix.scrollview import ScrollView
from kivy.properties import ListProperty, StringProperty,ObjectProperty
from kivy.uix.screenmanager import ScreenManager,Screen
from kivy.core.window import Window
from kivy.lang import Builder
from kivy.uix.gridlayout import GridLayout
class WindowManager(ScreenManager):
pass
class Name(FloatLayout):
def __init__(self, **kwargs):
super(Name, self).__init__(**kwargs)
def changeName(self):
print(self.ids)
self.name = self.ids.nameOfSong.text
print(self.name)
self.ids.nameOfSong.text = 'name'
self.name = self.ids.nameOfSong.text
print(self.name)
class MainWindow(Screen):
def __init__(self, **kwargs):
super(MainWindow, self).__init__(**kwargs)
self.pos = (0, 0)
self.size = (1,1)
self.z = Name()
self.add_widget(self.z)
def swap(self):
Name().changeName()
class SecondWindow(Screen,BoxLayout):
def __init__(self, **kwargs):
super(SecondWindow, self).__init__(**kwargs)
class langApp(App):
def build(self):
sm = ScreenManager()
sm.add_widget(MainWindow(name='main'))
sm.add_widget(SecondWindow(name='second'))
return sm
Builder.load_file("kiv.kv")
if __name__ == '__main__':
langApp().run()
My kiv.kv file, most of it is not connected to the problem (I think)
#:kivy 1.11.1
WindowManager:
MainWindow:
SecondWindow:
<MainWindow>:
name: "main"
FloatLayout:
pos: 0,0
size: root.width,root.height
Button:
on_release:
root.manager.transition.direction = 'left'
app.root.current = "second"
text: 'Stop'
pos_hint: {'x':.45,'y':.1}
size_hint: .1,.1
Button:
on_press: root.swap()
text: 'Next'
pos_hint: {'x':.65,'y':.1}
size_hint: .1,.1
<SecondWindow>:
name: "second"
FloatLayout:
pos: 0,0
size: root.width,root.height
Button:
on_release:
root.manager.transition.direction = 'right'
app.root.current = "main"
text: 'Stop'
pos_hint: {'x':.45,'y':.1}
size_hint: .1,.1
<Name>:
Label:
text: nameOfSong
font_size: 20
size_hint: None, None
pos_hint: {'x': 0.435, 'y': 0.25}
A few problems with your code:
First, your code as posted dos not run. The line in your kv:
text: nameOfSong
is illegal.
Second, the code:
def swap(self):
Name().changeName()
is creating a new instance of Name and calling changeName() on that new instance. However, that new instance is not the one that is displayed in your GUI.
To fix that, you just need to call changeName() on the instance of Name that is in your GUI. Conveniently, you have saved a reference to the correct instance with the line:
self.z = Name()
So, you can change the swap() method to use that instance of Name:
def swap(self):
self.z.changeName()
The other problem is that the changeName() method tries to use a non-existent id nameOfSong. To fix that (and to make your posted code runnable), just change the <Name> rule in your kv to define that id:
<Name>:
Label:
id: nameOfSong
text: 'Some Name'
font_size: 20
size_hint: None, None
pos_hint: {'x': 0.435, 'y': 0.25}
On an unrelated note, your code is building the App GUI twice. The line:
Builder.load_file("kiv.kv")
is building the GUI from the lines:
WindowManager:
MainWindow:
SecondWindow:
and your python code is building it again here:
def build(self):
sm = ScreenManager()
sm.add_widget(MainWindow(name='main'))
sm.add_widget(SecondWindow(name='second'))
return sm
You can delete those three lines from your kv file.
I'm new to kivy and python so my code isn't perfect.
I'm trying to make a program with 2 screens, a first screen where there is a label with a text that is not defined and that can change and a second screen that keeps the same text as the first screen.
I've been searching for a week and I tried to make a global variable that I edit and that becomes the text of the second label but it doesn't work.
I also tried with String. property () or object. property () but I didn't get any more results and I didn't really understand how to use it.
Any help would be welcome <3
(sorry for my english)
Here is a part of my code that I have simplified as much as possible:
from kivy.app import App
from kivy.uix.button import Button
from kivy.uix.floatlayout import FloatLayout
from kivy.uix.label import Label
from kivy.core.window import Window
from kivy.lang import Builder
from kivy.uix.screenmanager import ScreenManager, Screen
Builder.load_string("""
<MenuScreen>:
label_wid : ratio
FloatLayout:
Button:
text: "options"
pos: 270, 240
size_hint: .30, .10
background_color: 0,1,0,0.75
on_press: root.manager.current = 'settings'
Label:
id:ratio
text: ""
pos: 0,90
font_size:30
color:1,0,0,1
<SettingsScreen>:
label_wid2 : ratio
FloatLayout:
Label:
id:ratio
text: str(root.texte2())
pos: 0,90
font_size:30
color:1,0,0,1
""")
u=""
class MenuScreen(Screen):
def texte(self):
global u
u= self.label_wid.text = 'exemple'
pass
class SettingsScreen(Screen):
def texte2(self):
self.label_wid2.text=u
pass
class Quizz(App):
def build(self):
self.title = 'Quizz'
Window.clearcolor = (0, 1, 1, 0.25)
return sm
sm = ScreenManager()
sm.add_widget(MenuScreen(name='menu'))
sm.add_widget(SettingsScreen(name='settings'))
if __name__ == '__main__':
Quizz().run()
from kivy.app import App
from kivy.uix.button import Button
from kivy.uix.floatlayout import FloatLayout
from kivy.uix.label import Label
from kivy.core.window import Window
from kivy.lang import Builder
from kivy.uix.screenmanager import ScreenManager, Screen
Builder.load_string("""
<MenuScreen>:
label_wid : ratio
FloatLayout:
Button:
text: "options"
pos: 270, 240
size_hint: .30, .10
background_color: 0,1,0,0.75
on_press: root.manager.current = 'settings'
Label:
id:ratio
text: ""
pos: 0,90
font_size:30
color:1,0,0,1
<SettingsScreen>:
label_wid : ratio
FloatLayout:
Label:
id:ratio
text: root.texte2()
pos: 0,90
font_size:30
color:1,0,0,1
""")
u=""
class MenuScreen(Screen):
def texte(self):
global u
u= self.label_wid.text = 'exemple'
pass
class SettingsScreen(Screen):
def texte2(self, text):
u
pass
class Quizz(App):
def build(self):
self.title = 'Quizz'
Window.clearcolor = (0, 1, 1, 0.25)
return sm
sm = ScreenManager()
sm.add_widget(MenuScreen(name='menu'))
sm.add_widget(SettingsScreen(name='settings'))
if __name__ == '__main__':
Quizz().run() ```
Using a StringProperty in the ScreenManager and another in SettingsScreen provide a source of text for both Labels in the different Screens. And changing the StringProperty can change both Labels:
from kivy.app import App
from kivy.clock import Clock
from kivy.properties import StringProperty
from kivy.core.window import Window
from kivy.lang import Builder
from kivy.uix.screenmanager import ScreenManager, Screen
class MenuScreen(Screen):
pass
class SettingsScreen(Screen):
# this is the text to be used when the first Label text is not '1'
theOtherText = StringProperty('Not One')
class MyScreenManager(ScreenManager):
# This is the text that both Labels may display
theText = StringProperty('0')
kv = """
MyScreenManager:
MenuScreen:
name: 'menu'
SettingsScreen:
name: 'settings'
<MenuScreen>:
label_wid : ratio
FloatLayout:
Button:
text: "options"
pos: 270, 240
size_hint: .30, .10
background_color: 0,1,0,0.75
on_press: root.manager.current = 'settings'
Label:
id:ratio
# Use theText Property from MyScreenManager
text: root.manager.theText
pos: 0,90
font_size:30
color:1,0,0,1
<SettingsScreen>:
label_wid : ratio
FloatLayout:
Label:
id:ratio
# Use theText Property from MyScreenManager
text: '1' if root.manager.theText == '1' else root.theOtherText
pos: 0,90
font_size:30
color:1,0,0,1
"""
class Quizz(App):
def build(self):
self.title = 'Quizz'
Window.clearcolor = (0, 1, 1, 0.25)
Clock.schedule_once(self.change_text, 4)
return Builder.load_string(kv)
def change_text(self, dt):
print('changing text')
self.root.theText = '1'
if __name__ == '__main__':
Quizz().run()
Building the MyScreenManager in the kv eliminates the need to check if the manager attribute of the Screens is set. That simplifies the logic in the kv. Then the line in kv:
text: '1' if root.manager.theText == '1' else root.theOtherText
sets the text of the second Label to 1 if the first Label text is 1, otherwise it is set to the value of theOtherText in the SettingsScreen.
I have added a Clock.schedule_once() just for testing.
This is my code which just accepts numbers and add them and displays results in label, numbers are accepted through spinners. But I need splash screen before the main app is loaded. I want to know how we can use image as an splash screen and display for a while until the main app starts.
from kivy.lang import Builder
from kivy.uix.floatlayout import FloatLayout
from kivy.properties import StringProperty
from kivy.uix.spinner import Spinner
from kivy.app import App
Builder.load_string('''
<MainScreen>:
GridLayout:
orientation: 'vertical'
cols: 1
canvas.before:
Color:
rgba: 1, 1, 1, 1
Rectangle:
pos: self.pos
size: self.size
GridLayout:
orientation: 'vertical'
cols: 2
Spinner:
id: first
text: ' First Number'
values: ['1','2','3','4','5','6','7','8','9']
Spinner:
id: second
text: ' Second Number'
values: ['1','2','3','4','5','6','7','8','9']
Label:
id: result
text: ' Result'
color: 0,0,0,1
Button:
id: res
on_press: root.onPow(first.text,second.text)
text: 'Progress'
''')
class MainScreen(FloatLayout):
changet = StringProperty()
def __init__(self, **kwargs):
super(MainScreen, self).__init__(**kwargs)
def onPow(self,fir,sec):
a = 0
b = 0
for i in range((10000)):
print(b)
self.ids.result.text=str(b*(int(fir)*int(sec)+i))
b+=1
class TestApp(App):
def build(self):
return MainScreen()
if __name__ == "__main__":
TestApp().run()
Image for splash screen:
Even can we use labels with this image. Thank you.
I am attempting to dynamically add and remove widgets from a GridLayout with Python-Kivy, and I am running into an issue with weak references. When the Screen containing the GridLayout is initialized, I am placing a Label inside of the GridLayout that contains text notifying the user that the container has no items (technically, it has the Label in there so it is not necessarily empty). Then I have a Button that allows the user to add individual GridLayout widgets to the GridLayout that contain a Label, a TextInput and a CheckBox, as well as a Button that allows the user to remove those individual GridLayout widgets that they created. If all of these widgets (dynamically added by the user) are removed, then the original Label is added back to the GridLayout.
When I attempt to construct this logic in Python to pair with Kivy, I run into an issue where the original Label never seems to be fully removed from the stack.
I was under the impression that self.ids.widget_list.remove_widget(self.ids.empty) would remove the Label widget with id empty, however this is not the case. It is clear that the widget still exists, when I call print(self.ids):
{'widget_list': <WeakProxy to <kivy.uix.gridlayout.GridLayout object at 0x0451F030>>, 'empty': <WeakProxy to <kivy.uix.gridlayout.GridLayout object at 0x0451F9D0>>}
Any help is much appreciated.
EDIT
When checking for i in self.layouts: print(i.children) every time the remove() method is called, shows that the references to the added widgets are never being completely removed. This may be where my issues resides, but unsure how to resolve it.
Python
import kivy
from kivy.app import App
from kivy.lang import Builder
from kivy.uix.gridlayout import GridLayout
from kivy.uix.button import Button
from kivy.uix.textinput import TextInput
from kivy.uix.scrollview import ScrollView
from kivy.uix.label import Label
from kivy.uix.checkbox import CheckBox
from kivy.uix.popup import Popup
from kivy.uix.screenmanager import ScreenManager, Screen
#Load kv file
Builder.load_file('test.kv')
#First Screen
class Screen1(Screen):
layouts = []
def remove(self):
for i in self.layouts:
if i.children[0].active:
self.ids.widget_list.remove_widget(i)
if len(self.layouts)==0:
layout = GridLayout(rows=1, id=empty)
layout.add_widget(Label(text='Nothing Here'))
self.ids.widget_list.add_widget(layout)
else:
self.update_hints()
def add(self):
if len(self.ids.widget_list.children)<5:
print(self.ids)
self.ids.widget_list.remove_widget(self.ids.empty)
print(self.ids)
layout = GridLayout(cols=3)
layout.add_widget(Label(text='Test ' + str(len(self.ids.widget_list.children)+1)))
layout.add_widget(TextInput())
layout.add_widget(CheckBox())
self.ids.widget_list.add_widget(layout)
self.layouts.append(layout)
self.update_hints()
else:
layout = GridLayout(cols=1)
layout.add_widget(Label(text='Only five allowed at once.\nRemove at least one to add another.'))
button = Button(text='Acknowledge'); layout.add_widget(button)
popup = Popup(content=layout, title='Limit Reached', size_hint=(.5,.5), auto_dismiss=False)
button.bind(on_release=popup.dismiss)
popup.open()
def update_hints(self):
for i in self.layouts:
i.children[1].hint_text = 'Ex. ' + str(round(100/len(self.ids.widget_list.children),2)) + '%'
#Initialize Screens and Start App
class MyScreenManager(ScreenManager):
pass
#Main application
class SampleApp(App):
def build(self):
self.sm = MyScreenManager()
return self.sm
if __name__ == '__main__':
SampleApp().run()
kv
<MyScreenManager>:
Screen1:
name: 'screen1'
<Screen1>:
BoxLayout:
orientation: 'vertical'
GridLayout:
cols: 3
padding: 20
spacing: 20
size_hint: 1, .1
Label:
text: 'List of Widgets'
underline: True
Label:
text: 'Percentage'
underline: True
Label:
text: 'Remove (Y/N)'
underline: True
ScrollView:
size_hint: 1, .5
do_scroll_x: False
padding: 20
spacing: 20
GridLayout:
id: widget_list
cols: 1
spacing: 5
GridLayout:
id: empty
rows: 1
Label:
text: 'Nothing Here'
GridLayout:
cols: 3
padding: 20
spacing: 20
size_hint: 1, .2
Button:
text: 'Add Widget'
on_release: root.add()
Label:
text: ''
Button:
text: 'Remove Widget'
on_release: root.remove()
Ok, I seem to have found a simpler means of implementation that avoids specifying any id for the initial Label (the same one that shows if self.layouts==[]):
Python
import kivy
from kivy.app import App
from kivy.lang import Builder
from kivy.uix.gridlayout import GridLayout
from kivy.uix.button import Button
from kivy.uix.textinput import TextInput
from kivy.uix.scrollview import ScrollView
from kivy.uix.label import Label
from kivy.uix.checkbox import CheckBox
from kivy.uix.popup import Popup
from kivy.uix.screenmanager import ScreenManager, Screen
#Load kv file
Builder.load_file('test.kv')
#First Screen
class Screen1(Screen):
count = 0
layouts = []
def remove(self):
for i in self.layouts:
if i.children[0].active:
self.ids.widget_list.remove_widget(i)
self.layouts = [i for i in self.layouts if not i.children[0].active]
if self.layouts!=[]:
self.update_hints()
else:
layout = GridLayout(rows=1)
layout.add_widget(Label(text='Nothing Here'))
self.ids.widget_list.add_widget(layout)
def add(self):
if self.layouts==[]:
self.ids.widget_list.clear_widgets()
if len(self.ids.widget_list.children)<5:
self.count+=1
layout = GridLayout(cols=3)
layout.add_widget(Label(text='Test ' + str(self.count)))
layout.add_widget(TextInput())
layout.add_widget(CheckBox())
self.ids.widget_list.add_widget(layout)
self.layouts.append(layout)
self.update_hints()
else:
layout = GridLayout(cols=1)
layout.add_widget(Label(text='Only five allowed at once.\nRemove at least one to add another.'))
button = Button(text='Acknowledge'); layout.add_widget(button)
popup = Popup(content=layout, title='Limit Reached', size_hint=(.5,.5), auto_dismiss=False)
button.bind(on_release=popup.dismiss)
popup.open()
def update_hints(self):
for i in self.layouts:
i.children[1].hint_text = 'Ex. ' + str(round(100/len(self.ids.widget_list.children),2)) + '%'
#Initialize Screens and Start App
class MyScreenManager(ScreenManager):
pass
#Main application
class SampleApp(App):
def build(self):
self.sm = MyScreenManager()
return self.sm
if __name__ == '__main__':
SampleApp().run()
kv
<MyScreenManager>:
Screen1:
name: 'screen1'
<Screen1>:
BoxLayout:
orientation: 'vertical'
GridLayout:
cols: 3
padding: 20
spacing: 20
size_hint: 1, .1
Label:
text: 'List of Widgets'
underline: True
Label:
text: 'Percentage'
underline: True
Label:
text: 'Remove (Y/N)'
underline: True
ScrollView:
size_hint: 1, .5
do_scroll_x: False
padding: 20
spacing: 20
GridLayout:
id: widget_list
cols: 1
spacing: 5
GridLayout:
rows: 1
Label:
text: 'Nothing Here'
GridLayout:
cols: 3
padding: 20
spacing: 20
size_hint: 1, .2
Button:
text: 'Add Widget'
on_release: root.add()
Label:
text: ''
Button:
text: 'Remove Widget'
on_release: root.remove()