all, i can not pass the goi into the function submit_goi in class VQCIA in my kivy code. i'd appreciate if some one can fix the code. print self.goi.text() sentence reports a problem, and it says AttributeError: 'NoneType' object has no attribute 'text'. that is really weird.
# ---------- vqcia.py ----------
from kivy.app import App
from kivy.uix.boxlayout import BoxLayout
from kivy.properties import ObjectProperty
from kivy.lang import Builder
from kivy.uix.screenmanager import ScreenManager, Screen
Builder.load_string("""
<HelloVQCIA>:
BoxLayout:
Button:
text: "Welcome to VQCIA"
on_press:
# You can define the duration of the change
# and the direction of the slide
root.manager.transition.direction = 'left'
root.manager.transition.duration = 1
root.manager.current = 'screen_two'
<VQCIA>:
BoxLayout:
orientation: "vertical"
goi: g_o_i
padding: 10
spacing: 10
size: 400, 200
pos: 200, 200
size_hint:None,None
BoxLayout:
Label:
text: "Enter gene of interest with TAIR ID:"
font_size: '25sp'
BoxLayout:
TextInput:
id: g_o_i
hint_text: 'AT3G20770'
multiline: False
font_size: '25sp'
BoxLayout:
Button:
text: "Submit"
size_hint_x: 15
on_press:
root.submit_goi()
""")
class HelloVQCIA(Screen):
pass
class VQCIA(Screen):
# Connects the value in the TextInput widget to these
# fields
goi = ObjectProperty()
def submit_goi(self):
print self.goi.text
# The ScreenManager controls moving between screens
screen_manager = ScreenManager()
# Add the screens to the manager and then supply a name
# that is used to switch screens
screen_manager.add_widget(HelloVQCIA(name="screen_one"))
screen_manager.add_widget(VQCIA(name="screen_two"))
class VQCIAApp(App):
def build(self):
return screen_manager
dbApp = VQCIAApp()
dbApp.run()
I want to make a multiscreen app and the first page is a welcome page. and the second page is the main page that user can submit a form. thank you.
In kv file, move goi: g_o_i to after class rule, <VQCIA>:
<VQCIA>:
goi: g_o_i
BoxLayout:
orientation: "vertical"
Related
I have a problem with my Kivy Python Code. I have 2 screens: 1st is to navigate to the second screen and on the 2nd screen there is a button to add text to a scrollview...navigating is working but it does not add any text to the scrollview...I think I need some help here! AttributeError: 'super' object has no attribute 'getattr'
import kivy
from kivy.app import App
from kivy.uix.label import Label
from kivy.uix.gridlayout import GridLayout
from kivy.uix.textinput import TextInput
from kivy.uix.button import Button
from kivy.uix.screenmanager import ScreenManager, Screen
from kivy.clock import Clock, mainthread
from kivy.core.window import Window
from kivy.uix.scrollview import ScrollView
from kivy.effects.scroll import ScrollEffect
from kivy.lang import Builder
Builder.load_string("""
<MenuScreen>:
name: 'mainmenu'
BoxLayout:
spacing: 1
orientation: "vertical"
Label:
text: "MAIN MENU"
Button:
text: 'Go to Screen 2'
on_release:
root.manager.current = 'screen2'
root.manager.transition.direction = "left"
Button:
text: 'Quit'
on_release: root.manager.current = app.exit_software()
<Screen2>:
name: 'screen2'
BoxLayout:
spacing: 1
orientation: "vertical"
ScrollView:
id: scroll_view
always_overscroll: False
BoxLayout:
size_hint_y: None
height: self.minimum_height
orientation: 'vertical'
Label:
id: label
text: "You can add some Text here by pressing the button"
size_hint: None, None
size: self.texture_size
Button:
text: 'Add text!'
size_hint_y: 0.1
on_release: app.add_text()
Button:
text: 'Back to main menu'
size_hint_y: 0.1
on_release:
root.manager.current = 'mainmenu'
root.manager.transition.direction = "right"
""")
# Declare both screens
class MenuScreen(Screen):
pass
class Screen2(Screen):
pass
class AddTextApp(App):
def __init__(self,**kwargs):
super().__init__(**kwargs)
def build(self):
# Create the screen manager
sm = ScreenManager()
sm.add_widget(MenuScreen(name='mainmenu'))
sm.add_widget(Screen2(name='screen2'))
return sm
def add_text(self):
self.root.ids.label.text += f"Some new Text\n"
self.root.ids.scroll_view.scroll_y = 0
def exit_software(self):
App.get_running_app().stop()
if __name__ == '__main__':
AddTextApp().run()
Thank you very much in advance!
The error occurred because self.root.ids gets access to widgets located in the root widget of the main class. To access the secondary screen elements, you need to add it to the main class (in your case, in ScreenManager) and set its id. Also, you have a lot of imported excess, so that it is clearly visible, I advise you to use Pycharm or something like that.
from kivy.app import App
from kivy.uix.screenmanager import Screen
from kivy.lang import Builder
kv = """
<MenuScreen>:
name: 'mainmenu'
BoxLayout:
spacing: 1
orientation: "vertical"
Label:
text: "MAIN MENU"
Button:
text: 'Go to Screen 2'
on_release:
root.manager.current = 'screen2'
root.manager.transition.direction = "left"
Button:
text: 'Quit'
on_release: root.manager.current = app.exit_software()
<Screen2>:
name: 'screen2'
BoxLayout:
spacing: 1
orientation: "vertical"
ScrollView:
id: scroll_view
always_overscroll: False
BoxLayout:
size_hint_y: None
height: self.minimum_height
orientation: 'vertical'
Label:
id: label
text: "You can add some Text here by pressing the button"
size_hint: None, None
size: self.texture_size
Button:
text: 'Add text!'
size_hint_y: 0.1
on_release: app.add_text()
Button:
text: 'Back to main menu'
size_hint_y: 0.1
on_release:
root.manager.current = 'mainmenu'
root.manager.transition.direction = "right"
ScreenManager:
MenuScreen:
id: menu_scr
Screen2:
id: scr_2
"""
class MenuScreen(Screen):
pass
class Screen2(Screen):
pass
class AddTextApp(App):
def __init__(self, **kwargs):
super().__init__(**kwargs)
def build(self):
return Builder.load_string(kv)
def add_text(self):
self.root.ids.scr_2.ids.label.text += f"Some new Text\n"
self.root.ids.scr_2.ids.scroll_view.scroll_y = 0
#staticmethod
def exit_software():
App.get_running_app().stop()
if __name__ == '__main__':
AddTextApp().run()
I'm trying to have my python and kivy file to open a popup. It says my Boxlayout object has no attribute 'open_popup'
Here is my python code:
from kivy.app import App
from kivy.properties import BooleanProperty, ListProperty
from kivy.modules import inspector
from kivy.core.window import Window
from kivy.uix.popup import Popup
class CustomPopup(Popup):
pass
class MPMS(App):
def build(self):
inspector.create_inspector(Window, self)
def show_config_popup(self, popup):
pass
def open_popup(self):
the_popup = CustomPopup()
the_popup.open()
if __name__ == '__main__':
app = MPMS()
app.run()
and here is my kivy
BoxLayout:
orientation: 'vertical'
Label:
text: 'MPMS'
BoxLayout:
orientation: 'horizontal'
size_hint: (1, 0.25)
BoxLayout:
orientation: 'vertical'
Button:
id: 'screening_button_mainmenu'
text: 'Screening'
BoxLayout:
orientation: 'vertical'
Button:
id: 'configuration_button_mainmenu'
text: 'Configuration'
on_press: root.open_popup()
<CustomPopup>:
size_hint: .5, .5
auto_dismiss: False
title: "The Popup"
BoxLayout:
orientation: 'horizontal'
Label:
text: 'popup has appeared'
I tried looking up videos on youtube and whatnot but I couldn't see it helping me because I couldn't apply it to my situation. Please help me out. thanks in advance
That's because your are doing on_press: root.open_popup(), and root in that case is your BoxLayout (the root of that kv rule). What you want is
on_press: app.open_popup()
Because the open_popup() method is in your App.
Now I'm already using ScreenManager in a different project where it works with no issues. But amazingly same setup doesn't work in any other projects. Simply can't figure out why my screen can only be switched to a new screen (which was not displayed before) and not to any previous screens. I'm posting a simple code to show this phenomenon. Please advice what am I seriously missing. Thank you.
screenmanager_test.py
import kivy
kivy.require('1.11.0')
import os
os.environ['KIVY_GL_BACKEND'] = 'gl'
from kivy.app import App
from kivy.uix.popup import Popup
from kivy.uix.boxlayout import BoxLayout
from kivy.uix.screenmanager import Screen, ScreenManager, FadeTransition
from kivy.clock import Clock
class MainScreen(Screen):
def setName(self,*args):
FirstPopup().open()
class SecondScreen(Screen):
pass
class FirstPopup(Popup):
pass
class MyScreenManager(ScreenManager):
pass
class SmTestApp(App):
def build(self):
sm = MyScreenManager()
sm = ScreenManager(transition=FadeTransition())
sm.add_widget(MainScreen(name="main_scr"))
sm.add_widget(SecondScreen(name="second_scr"))
return sm
SmTestApp().run()
smtest.kv
#: kivy 1.11.0
<MainScreen>:
name: 'main_scr'
BoxLayout:
orientation: 'vertical'
padding: 100,100
spacing: 50
Label:
text: 'Welcome to Main Screen'
font_size: 35
Button:
text: 'Options'
font_size: 15
on_release: root.setName(*args)
Button:
text: 'Next Screen'
font_size: 15
on_release: app.root.current = 'second_scr'
<SecondScreen>:
name: 'second_scr'
BoxLayout:
orientation:'vertical'
padding:100,100
spacing:50
Label:
text: 'This is your second screen'
font_size: 35
Button:
text: 'Back'
font_size: 25
on_release: app.root.current = 'main_scr'
<FirstPopup>:
title: 'Options Window'
size_hint: None, None
size: 400,370
BoxLayout:
orientation : 'vertical'
Label:
text : "Checkbox options listed here"
Button:
text: "OK"
on_release: root.dismiss()
Ok. Here is what I have found. I removed that FadeTransition effect and things came back to normal. I checked all other available transition methods and found that out of 8 , 4 transition style causes the program to exit. The effects which are causing this error are Fade, Wipe, FallOut and RiseIn.
If this is caused due to some other wrongly set paramenter, I don't know. If anyone can give an explanation then that would be fine. If not any how the cause has been identified. Thank you #John Anderson.
I have a piece of code. (1) The TextInput value should be shown , but first it should not be editable, after clicking the corresponding CheckBox, the TextInput will be editable.
(2) Using the iteration, the Label and the TextInput should get the value. The value at Label and TextInput should not be hard coded(although it's there in my code, #FJSevilla helped me for this one).
(3) However, the values of Label and TextInput are stored in a variable in json format. something like this(you can consider like key,value pair in map) [ variable = '{"a" : " Goc" , "b" : "Coc", "c" : "Dow" } ']
(you can see diagram for more clearance).
I appreciate the help.
from kivy.app import App
from kivy.uix.tabbedpanel import TabbedPanel
from kivy.lang import Builder
Builder.load_string("""
<Test>:
do_default_tab: False
TabbedPanelItem:
text: 'page1'
BoxLayout:
padding: 50, 50, 50, 50
orientation: 'horizontal'
BoxLayout:
spacing: 50
orientation: 'vertical'
size_hint_x: 1
Label:
text: 'a'
Label:
text: 'b'
Label:
text: 'c'
BoxLayout:
spacing: 50
orientation: 'vertical'
TextInput:
text: 'Goc'
TextInput:
text: 'Coc'
TextInput:
text: 'Dow'
BoxLayout:
spacing: 50
orientation: 'vertical'
size_hint_x: 0.40
CheckBox:
text: 'CheckBox'
CheckBox:
text: 'CheckBox'
CheckBox:
text: 'CheckBox'
BoxLayout:
spacing: 50
orientation: 'vertical'
size_hint_x: 0.60
Button:
text: 'save'
Button:
text: 'save'
Button:
text: 'save'
""")
class Test(TabbedPanel):
pass
class MyApp(App):
def build(self):
test = Test()
return test
if __name__ == '__main__':
MyApp().run()
First of all, thank you for providing an app which was easy to work with.
I tried to implement what you were looking for except the JSON. I am using a simple list, it should be straightforward to extend my code for a JSON.
Instead of using colums, I am using rows which makes it easier to link together the properties of the label textinput and checkbox.
from kivy.app import App
from kivy.uix.tabbedpanel import TabbedPanel
from kivy.uix.boxlayout import BoxLayout
from kivy.properties import StringProperty
from kivy.uix.textinput import TextInput
from kivy.uix.checkbox import CheckBox
from kivy.lang import Builder
ROWS = ['Goc', 'COC', 'EEE']
Builder.load_string("""
<Test>:
do_default_tab: False
TabbedPanelItem:
text: 'page1'
Table:
padding: 50, 50, 50, 50
orientation: 'vertical'
<Row>:
spacing: 50
#orientation: 'vertical'
size_hint_x: 1
txt: txtinpt.text
Label:
text: root.txt
TextInput:
id: txtinpt
text: root.txt
disabled: not CheckBox.active
CheckBox:
id:CheckBox
text: 'CheckBox'
active: False
Button:
text: 'save'
""")
class Table(BoxLayout):
def __init__(self, **kwargs):
super(Table, self).__init__(**kwargs)
for row in ROWS:
self.add_widget(Row(row))
class Row(BoxLayout):
txt = StringProperty()
def __init__(self, row, **kwargs):
super(Row, self).__init__(**kwargs)
self.txt = row
class Test(TabbedPanel):
pass
class MyApp(App):
def build(self):
test = Test()
return test
if __name__ == '__main__':
MyApp().run()
I am trying to use input on one screen to make a list on a second screen using kivy. The basic idea is that a paragraph is broken up into words, which are then displayed on another page. Below is a minimum example.
What is happening is that the words are getting squished together, and there's no scrolling.
In main.py:
from kivy.app import App
from kivy.app import Widget
from kivy.uix.floatlayout import FloatLayout
from kivy.uix.gridlayout import GridLayout
from kivy.uix.label import Label
from kivy.uix.screenmanager import ScreenManager, Screen
from kivy.properties import ObjectProperty
class InputScreen(Screen):
wordList = ObjectProperty()
def getwords(self):
self.wordList=[]
s = self.ids.textInput.text.split()
for w in s:
for punctuation in [',','.','!','?']:
w.strip(punctuation)
self.wordList.append(w)
return None
class WordLabel(Label):
pass
class WordScreen(Screen):
wordList = ObjectProperty()
def updateWords(self):
self.ids.scrollContainer.clear_widgets()
wordGrid = GridLayout(cols=2,size_hint_y=None)
wordGrid.bind(minimum_height=wordGrid.setter('height'))
for w in self.wordList:
wordGrid.add_widget(Label(text=w))
wordGrid.add_widget(Label(text='property of word'))
self.ids.scrollContainer.add_widget(wordGrid)
class testScreenManager(ScreenManager):
pass
class testApp(App):
def build(self):
sm = testScreenManager()
return sm
if __name__=='__main__':
testApp().run()
In test.kv:
<testScreenManager>
InputScreen:
id: inputScreen
name: 'input'
WordScreen:
id: wordScreen
name: 'word'
wordList: inputScreen.wordList
<InputScreen>:
GridLayout:
cols: 1
TextInput:
id: textInput
hint_text: 'Input paragraph'
BoxLayout:
orientation: 'horizontal'
size_hint_y: .2
Button:
text: 'Analyze paragraph'
on_press: root.getwords()
Button:
text: 'See word list'
on_press:
root.getwords()
root.manager.transition.direction = 'left'
root.manager.current = 'word'
BoxLayout:
orientation: 'horizontal'
size_hint_y: .2
Label:
id: wordCountResult
text: ''
<WordScreen>:
on_enter: root.updateWords()
BoxLayout:
orientation: 'vertical'
BoxLayout:
id: rowLabels
orientation: 'horizontal'
size_hint_y: .2
Label:
text: 'Words not at grade level:'
size_hint_x: .5
Label:
text: 'Grade Level'
size_hint_x: .5
ScrollView:
id: scrollContainer
size_hint: (None,None)
size: (self.parent.width,self.parent.height - rowLabels.height - buttonRow.height)
Button:
id: buttonRow
size_hint_y: .2
text: 'Back'
on_press:
root.manager.transition.direction = 'right'
root.manager.current = 'input'
<WordLabel>:
size_hint_y: None
height: '29sp'
I've tried using size_hint_y=.6 for the ScrollView, and swapping height and minimum_height in the wordGrid.bind(minimum_height=wordGrid.setter('height')).
What I thought was going to happen, is that the ScrollView container will be the height of the window minus the height used by two other widgets. Inside the ScrollView, WordGrid is longer (the height is bound to the minimum height necessary for all children) and so the scrolling is used to see all the items. I must not be understanding some fact about heights/sizes of ScrollView, WordGrid, and WordGrid's children. Anyone have some insight?
In this part of the code:
for w in self.wordList:
wordGrid.add_widget(Label(text=w))
wordGrid.add_widget(Label(text='property of word'))
the Label by default will have size_hint_y=1. Instead, size_hint_y=None is necessary. A height can be set, as is done in the WordLabel class - which was what the OP (by me) meant to do.
Thanks to related question Kivy ScrollView - Not Scrolling for helping me to realize the error.