Adding Scrollbar to Boxlayout in Kivy

» python » Adding Scrollbar to Boxlayout in Kivy

By : Adam

Date : November 18 2020, 01:01 AM

around this issue I am trying to a Boxlayout with ScrollBar in Kivy, but I am not able to do it. Below excerpt of .kv file. I am dynamically adding controls to Boxlayout once the Boxlayout overflows controls are hidden and there is not Scrollbar. Please advise.

code :

ScrollView:
        size_hint: (None, None)
        size: (400, 400)
        BoxLayout:
            id: output
            orientation: 'vertical'

ScrollView:
        size_hint: (None, None)
        size: (400, 400)
        GridLayout:
            id: output
            cols: 1
            size_hint_y: None
            height: self.minimum_height

Share :

Kivy: Can you subdivide a BoxLayout within another BoxLayout?

By : Starburst1427

Date : March 29 2020, 07:55 AM

around this issue Yes that is possible. You just nest another boxlayout.
Like this:

code :

<WeatherWidget>:
    cols: 1
    BoxLayout:
        size_hint_y: None
        BoxLayout:
            size_hint_x: 1
            orientation: "vertical"
            Image:
                src: "yourimage"
            Button:
                text: root.current_temperature()
        Label:
            text: 'Tomorrow'
            size_hint_x: 0.25

Kivy : how to add vertical scrollbar in boxlayout

By : Alex Axthelm

Date : March 29 2020, 07:55 AM

I wish this help you when you are using a vertical scrollview you must set the height of the only child like this:

code :

ScrollView:
    BoxLayout:
        size_hint_y: None
        height: #the height that you want

kivy Calendar: How to insert kivy Calendar in a BoxLayout and set a function in its buttons

By : Julio Zebadua

Date : March 29 2020, 07:55 AM

I wish did fix the issue. As I indicated in my comments, it is bad programming practice to call a variable and a function with the same name since it can hide other properties
Going to the point, calendar = ObjectProperty() is not linked to anything that Calendar does not link to the BoxLayout, it is also a local variable that its life cycle ends when the constructor is finished. In your case when you use self.calendar.add_widget(self.cal) the self.calendar refers to the calendar method where you call it and clearly the name of a method is not a widget causing that error.

code :

from kivy.clock import Clock

...

class Reservation(Screen):
    calendar = ObjectProperty()
    def __init__(self, **kwargs):
        super(Reservation, self).__init__(**kwargs)
        Clock.schedule_once(lambda *args: self.create_calendar())

    def create_calendar(self):
        self.cal = CalendarWidget()
        self.calendar.add_widget(self.cal)

<Reservation>:
     name: "Reserve"
     calendar: calendar # set value to ObjectProperty
     BoxLayout:
         BoxLayout: 
             id: calendar
         BoxLayout: 
             id: output_box
             orientation: 'vertical'

Python Kivy - Adding a GridLayout to a BoxLayout

By : trontastic

Date : March 29 2020, 07:55 AM

help you fix your problem 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.

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(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()

KIVY : BoxLayout containing horizontal BoxLayout

By : zachhhanding

Date : March 29 2020, 07:55 AM

will help you What about this: I changed HBOX and VBOX widget to BoxLayout and added Label and another BoxLayouts to ContainerBox. It looks quite like on your drawing

code :

<HBoxWidget>:

    AnchorLayout:
        anchor_x: 'center'
        anchor_y: 'center'
        Image:
            source: 'duck.jpg'
<VBoxWidget1>:
    BoxLayout:
        orientation: "horizontal"
        size: [1,.25]
        pos: root.pos
        Label:
            text: "Status : "
            color: [0,84,80,19]
        Label:
            text: "Pending"
            color: [0,84,80,19]
        Widget: # Because of this widget Labels are not in the middle, its not on your drawing tough


<ContainerBox>:
    orientation: 'vertical'
    Label:
        text: 'Label'
        size_hint_y: 0.1
    BoxLayout:
        id: four_horizontals
        orientation: 'horizontal'
        HBoxWidget:
        BoxLayout:
            orientation:'vertical'
            # One solution
            #GridLayout:
            #    cols:1
            #    padding: 100
            #    VBoxWidget1:
            #    VBoxWidget1:
            #    VBoxWidget1:
            #    VBoxWidget1:

            #Second Solution
            BoxLayout:
                #size_hint_y: 0 to 1 - it says how much you reduce height. Now its 1/3 of its parent, because there are 3 boxlayouts. if you set 0.5, it will have 1/3*0.5 and the other 2 boxlayouts takes the height which you took from this one 
            BoxLayout:
                orientation:'vertical'
                VBoxWidget1:
                VBoxWidget1:
                VBoxWidget1:
                VBoxWidget1:
            BoxLayout:

from kivy.app import App
from kivy.uix.togglebutton import ToggleButton
from kivy.uix.widget import Widget
from kivy.uix.boxlayout import BoxLayout

class HBoxWidget(BoxLayout):
    def __init__(self, **kwargs):
        super(HBoxWidget, self).__init__(**kwargs)

class VBoxWidget1(BoxLayout):
    def __init__(self, **kwargs):
        super(VBoxWidget1, self).__init__(**kwargs)


class ContainerBox(BoxLayout):
    def __init__(self, **kwargs):
        super(ContainerBox, self).__init__(**kwargs)

class TestApp(App):
    def build(self):
        return ContainerBox() 

if __name__ == '__main__':
    TestApp().run()