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Slider

_images/slider.jpg

The Slider widget looks like a scrollbar. It supports horizontal and vertical orientations, min/max values and a default value.

To create a slider from -100 to 100 starting from 25:

from kivy.uix.slider import Slider
s = Slider(min=-100, max=100, value=25)

To create a vertical slider:

from kivy.uix.slider import Slider
s = Slider(orientation='vertical')

To create a slider with a red line tracking the value:

from kivy.uix.slider import Slider
s = Slider(value_track=True, value_track_color=[1, 0, 0, 1])
class kivy.uix.slider.Slider(**kwargs)[source]

Bases: kivy.uix.widget.Widget

Class for creating a Slider widget.

Check module documentation for more details.

background_disabled_horizontal

Background of the disabled slider used in the horizontal orientation.

New in version 1.9.2.

background_disabled_horizontal is a StringProperty and defaults to atlas://data/images/defaulttheme/sliderh_background_disabled.

background_disabled_vertical

Background of the disabled slider used in the vertical orientation.

New in version 1.9.2.

background_disabled_vertical is a StringProperty and defaults to atlas://data/images/defaulttheme/sliderv_background_disabled.

background_horizontal

Background of the slider used in the horizontal orientation.

New in version 1.9.2.

background_horizontal is a StringProperty and defaults to atlas://data/images/defaulttheme/sliderh_background.

background_vertical

Background of the slider used in the vertical orientation.

New in version 1.9.2.

background_vertical is a StringProperty and defaults to atlas://data/images/defaulttheme/sliderv_background.

background_width

Slider’s background’s width (thickness), used in both horizontal and vertical orientations.

background_width is a NumericProperty and defaults to 36sp.

border_horizontal

Border used to draw the slider background in horizontal orientation.

border_horizontal is a ListProperty and defaults to [0, 18, 0, 18].

border_vertical

Border used to draw the slider background in vertical orientation.

border_horizontal is a ListProperty and defaults to [18, 0, 18, 0].

cursor_disabled_image

Path of the image used to draw the disabled slider cursor.

cursor_image is a StringProperty and defaults to atlas://data/images/defaulttheme/slider_cursor_disabled.

cursor_height

Height of the cursor image.

cursor_height is a NumericProperty and defaults to 32sp.

cursor_image

Path of the image used to draw the slider cursor.

cursor_image is a StringProperty and defaults to atlas://data/images/defaulttheme/slider_cursor.

cursor_size

Size of the cursor image.

cursor_size is a ReferenceListProperty of (cursor_width, cursor_height) properties.

cursor_width

Width of the cursor image.

cursor_width is a NumericProperty and defaults to 32sp.

max

Maximum value allowed for value.

max is a NumericProperty and defaults to 100.

min

Minimum value allowed for value.

min is a NumericProperty and defaults to 0.

orientation

Orientation of the slider.

orientation is an OptionProperty and defaults to ‘horizontal’. Can take a value of ‘vertical’ or ‘horizontal’.

padding

Padding of the slider. The padding is used for graphical representation and interaction. It prevents the cursor from going out of the bounds of the slider bounding box.

By default, padding is 16sp. The range of the slider is reduced from padding *2 on the screen. It allows drawing the default cursor of 32sp width without having the cursor go out of the widget.

padding is a NumericProperty and defaults to 16sp.

range

Range of the slider in the format (minimum value, maximum value):

>>> slider = Slider(min=10, max=80)
>>> slider.range
[10, 80]
>>> slider.range = (20, 100)
>>> slider.min
20
>>> slider.max
100

range is a ReferenceListProperty of (min, max) properties.

step

Step size of the slider.

New in version 1.4.0.

Determines the size of each interval or step the slider takes between min and max. If the value range can’t be evenly divisible by step the last step will be capped by slider.max

step is a NumericProperty and defaults to 1.

value

Current value used for the slider.

value is a NumericProperty and defaults to 0.

value_normalized

Normalized value inside the range (min/max) to 0-1 range:

>>> slider = Slider(value=50, min=0, max=100)
>>> slider.value
50
>>> slider.value_normalized
0.5
>>> slider.value = 0
>>> slider.value_normalized
0
>>> slider.value = 100
>>> slider.value_normalized
1

You can also use it for setting the real value without knowing the minimum and maximum:

>>> slider = Slider(min=0, max=200)
>>> slider.value_normalized = .5
>>> slider.value
100
>>> slider.value_normalized = 1.
>>> slider.value
200

value_normalized is an AliasProperty.

value_pos

Position of the internal cursor, based on the normalized value.

value_pos is an AliasProperty.

value_track

Decides if slider should draw the line indicating the space between min and value properties values.

value_track is a BooleanProperty and defaults to False.

value_track_color

Color of the value_line in rgba format.

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

value_track_width

Width of the track line.

value_track_width is a NumericProperty and defaults to 3dp.