Bubble¶

New in version 1.1.0.

The Bubble widget is a form of menu or a small popup where the menu options are stacked either vertically or horizontally.

The Bubble contains an arrow pointing in the direction you choose.

Simple example¶

'''
Bubble
======

Test of the widget Bubble.
'''

from kivy.app import App
from kivy.uix.floatlayout import FloatLayout
from kivy.uix.button import Button
from kivy.lang import Builder
from kivy.uix.bubble import Bubble

Builder.load_string('''
<cut_copy_paste>
    size_hint: (None, None)
    size: (160, 120)
    pos_hint: {'center_x': .5, 'y': .6}
    BubbleButton:
        text: 'Cut'
    BubbleButton:
        text: 'Copy'
    BubbleButton:
        text: 'Paste'
''')


class cut_copy_paste(Bubble):
    pass


class BubbleShowcase(FloatLayout):

    def __init__(self, **kwargs):
        super(BubbleShowcase, self).__init__(**kwargs)
        self.but_bubble = Button(text='Press to show bubble')
        self.but_bubble.bind(on_release=self.show_bubble)
        self.add_widget(self.but_bubble)

    def show_bubble(self, *l):
        if not hasattr(self, 'bubb'):
            self.bubb = bubb = cut_copy_paste()
            self.add_widget(bubb)
        else:
            values = ('left_top', 'left_mid', 'left_bottom', 'top_left',
                'top_mid', 'top_right', 'right_top', 'right_mid',
                'right_bottom', 'bottom_left', 'bottom_mid', 'bottom_right')
            index = values.index(self.bubb.arrow_pos)
            self.bubb.arrow_pos = values[(index + 1) % len(values)]


class TestBubbleApp(App):

    def build(self):
        return BubbleShowcase()


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

Customize the Bubble¶

You can choose the direction in which the arrow points:

Bubble(arrow_pos='top_mid')

The widgets added to the Bubble are ordered horizontally by default, like a Boxlayout. You can change that by:

orientation = 'vertical'

To add items to the bubble:

bubble = Bubble(orientation = 'vertical')
bubble.add_widget(your_widget_instance)

To remove items:

bubble.remove_widget(widget)
or
bubble.clear_widgets()

To access the list of children, use content.children:

bubble.content.children

Warning

This is important! Do not use bubble.children

To change the appearance of the bubble:

bubble.background_color = (1, 0, 0, .5) #50% translucent red
bubble.border = [0, 0, 0, 0]
background_image = 'path/to/background/image'
arrow_image = 'path/to/arrow/image'

class kivy.uix.bubble.Bubble(**kwargs)[source]¶

Bases: kivy.uix.gridlayout.GridLayout

Bubble class. See module documentation for more information.

add_widget(*l)[source]¶

Add a new widget as a child of this widget.

Parameters

widget: Widget
Widget to add to our list of children.

index: int, defaults to 0
Index to insert the widget in the list. Notice that the default of 0 means the widget is inserted at the beginning of the list and will thus be drawn on top of other sibling widgets. For a full discussion of the index and widget hierarchy, please see the Widgets Programming Guide.

New in version 1.0.5.

canvas: str, defaults to None
Canvas to add widget’s canvas to. Can be ‘before’, ‘after’ or None for the default canvas.

New in version 1.9.0.

>>> from kivy.uix.button import Button
>>> from kivy.uix.slider import Slider
>>> root = Widget()
>>> root.add_widget(Button())
>>> slider = Slider()
>>> root.add_widget(slider)

arrow_image¶

Image of the arrow pointing to the bubble.

arrow_image is a StringProperty and defaults to ‘atlas://data/images/defaulttheme/bubble_arrow’.

arrow_pos¶

Specifies the position of the arrow relative to the bubble. Can be one of: left_top, left_mid, left_bottom top_left, top_mid, top_right right_top, right_mid, right_bottom bottom_left, bottom_mid, bottom_right.

arrow_pos is a OptionProperty and defaults to ‘bottom_mid’.

background_color¶

Background color, in the format (r, g, b, a). To use it you have to set either background_image or arrow_image first.

background_color is a ListProperty and defaults to [1, 1, 1, 1].

background_image¶

Background image of the bubble.

background_image is a StringProperty and defaults to ‘atlas://data/images/defaulttheme/bubble’.

border¶

Border used for BorderImage graphics instruction. Used with the background_image. It should be used when using custom backgrounds.

It must be a list of 4 values: (bottom, right, top, left). Read the BorderImage instructions for more information about how to use it.

border is a ListProperty and defaults to (16, 16, 16, 16)

border_auto_scale¶

Specifies the kivy.graphics.BorderImage.auto_scale value on the background BorderImage.

New in version 1.11.0.

border_auto_scale is a OptionProperty and defaults to ‘both_lower’.

clear_widgets(**kwargs)[source]¶: Remove all (or the specified) children of this widget. If the ‘children’ argument is specified, it should be a list (or filtered list) of children of the current widget.

Changed in version 1.8.0: The children argument can be used to specify the children you want to remove.

content¶

This is the object where the main content of the bubble is held.

content is a ObjectProperty and defaults to ‘None’.

limit_to¶

Specifies the widget to which the bubbles position is restricted.

New in version 1.6.0.

limit_to is a ObjectProperty and defaults to ‘None’.

orientation¶

This specifies the manner in which the children inside bubble are arranged. Can be one of ‘vertical’ or ‘horizontal’.

orientation is a OptionProperty and defaults to ‘horizontal’.

remove_widget(*l)[source]¶

Remove a widget from the children of this widget.

Parameters

widget: Widget
Widget to remove from our children list.

>>> from kivy.uix.button import Button
>>> root = Widget()
>>> button = Button()
>>> root.add_widget(button)
>>> root.remove_widget(button)

show_arrow¶

Indicates whether to show arrow.

New in version 1.8.0.

show_arrow is a BooleanProperty and defaults to True.

class kivy.uix.bubble.BubbleButton(**kwargs)[source]¶

Bases: kivy.uix.button.Button

A button intended for use in a Bubble widget. You can use a “normal” button class, but it will not look good unless the background is changed.

Rather use this BubbleButton widget that is already defined and provides a suitable background for you.

class kivy.uix.bubble.BubbleContent(**kwargs)[source]¶: Bases: kivy.uix.gridlayout.GridLayout

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Table Of Contents

Bubble¶

Simple example¶

Customize the Bubble¶