Module: lib-widget.slider

Create a new slider widget

Useful when you to get the user to input a range of numbers

-- A slider between 0 and 10 with increments of 0.05, the default value is 5 and a callback function each time the value is updated
local slider = lib-widget.slider(0, 10, 0.05, 5, function(value)
     print("Updated slider value to: " ..

value)

end)

slider:set_value(8)

slider

Class Hierarchy

Info:

  • Copyright: 2020 Tom Meyers
  • Author: Tom Meyers

Static module functions

lib-widget.slider.slider (min, max, increment, default_value, callback[, tooltip_callback]) -> widget Create a slider widget
slider.update (value) Update the value of the slider

Object properties

handle_shape gears.shape The slider handle shape. Inherited from wibox.widget.slider
handle_color color The slider handle color. Inherited from wibox.widget.slider
handle_margins table The slider handle margins. Inherited from wibox.widget.slider
handle_width number The slider handle width. Inherited from wibox.widget.slider
handle_border_color color The handle border_color. Inherited from wibox.widget.slider
handle_border_width number The handle border width. Inherited from wibox.widget.slider
bar_shape gears.shape The bar (background) shape. Inherited from wibox.widget.slider
bar_height number The bar (background) height. Inherited from wibox.widget.slider
bar_color color The bar (background) color. Inherited from wibox.widget.slider
bar_active_color color The bar (active) color. Inherited from wibox.widget.slider
bar_margins table The bar (background) margins. Inherited from wibox.widget.slider
bar_border_width number The bar (background) border width. Inherited from wibox.widget.slider
bar_border_color color The bar (background) border_color. Inherited from wibox.widget.slider
value number The slider value. Inherited from wibox.widget.slider
minimum number The slider minimum value. Inherited from wibox.widget.slider
maximum number The slider maximum value. Inherited from wibox.widget.slider
children table Get or set the children elements. Inherited from wibox.widget.base
all_children table Get all direct and indirect children widgets. Inherited from wibox.widget.base
forced_height number or nil Force a widget height. Inherited from wibox.widget.base
forced_width number or nil Force a widget width. Inherited from wibox.widget.base
opacity number The widget opacity (transparency). Inherited from wibox.widget.base
visible boolean The widget visibility. Inherited from wibox.widget.base
buttons table The widget buttons. Inherited from wibox.widget.base

Theme variables

beautiful.slider_bar_border_width number The bar (background) border width. Inherited from wibox.widget.slider
beautiful.slider_bar_border_color color The bar (background) border color. Inherited from wibox.widget.slider
beautiful.slider_handle_border_color color The handle border_color. Inherited from wibox.widget.slider
beautiful.slider_handle_border_width number The handle border width. Inherited from wibox.widget.slider
beautiful.slider_handle_width number The handle width. Inherited from wibox.widget.slider
beautiful.slider_handle_color color The handle color. Inherited from wibox.widget.slider
beautiful.slider_handle_shape gears.shape The handle shape. Inherited from wibox.widget.slider
beautiful.slider_bar_shape gears.shape The bar (background) shape. Inherited from wibox.widget.slider
beautiful.slider_bar_height number The bar (background) height. Inherited from wibox.widget.slider
beautiful.slider_bar_margins table The bar (background) margins. Inherited from wibox.widget.slider
beautiful.slider_handle_margins table The slider handle margins. Inherited from wibox.widget.slider
beautiful.slider_bar_color color The bar (background) color. Inherited from wibox.widget.slider
beautiful.slider_bar_active_color color The bar (active) color. Inherited from wibox.widget.slider

Object methods

:add_button (button) Add a new awful.button to this widget. Inherited from wibox.widget.base
:emit_signal_recursive (signal_name, ...) Emit a signal and ensure all parent widgets in the hierarchies also forward the signal. Inherited from wibox.widget.base
:index (widget[, recursive[, ...]]) -> (number, widget, table) Get the index of a widget. Inherited from wibox.widget.base
:connect_signal (name, func) Connect to a signal. Inherited from gears.object
:weak_connect_signal (name, func) Connect to a signal weakly. Inherited from gears.object
:disconnect_signal (name, func) Disonnect from a signal. Inherited from gears.object
:emit_signal (name, ...) Emit a signal. Inherited from gears.object

Signals

widget::layout_changed When the layout (size) change. Inherited from wibox.widget.base
widget::redraw_needed When the widget content changed. Inherited from wibox.widget.base
button::press When a mouse button is pressed over the widget. Inherited from wibox.widget.base
button::release When a mouse button is released over the widget. Inherited from wibox.widget.base
mouse::enter When the mouse enter a widget. Inherited from wibox.widget.base
mouse::leave When the mouse leave a widget. Inherited from wibox.widget.base


Static module functions

lib-widget.slider.slider (min, max, increment, default_value, callback[, tooltip_callback]) -> widget
Create a slider widget

Parameters:

  • min number The lowest possible value for the slider
  • max number The highest possible value for the slider
  • increment number How much should one step increase the slider
  • default_value number To what value do we need to set the slider to initially
  • callback function A callback that gets triggered every time the value change_focus
  • tooltip_callback function A function that gets called each time a you want to show some information (optional)

Returns:

    widget The slider widget

Usage:

    -- This will create the content in hallo.txt to var=value
    -- A slider between 0 and 10 with increments of 0.05, the default value is 5 and a callback function each time the value is updated
    local slider = lib-widget.slider(0, 10, 0.05, 5, function(value)
         print("Updated slider value to: " .. value)
    end)
slider.update (value)
Update the value of the slider

Parameters:

  • value number The new numerical value of the slider

Usage:

    -- This will set the value of the slider to 8.5
     slider.update(8.5)

Object properties

handle_shape gears.shape · Inherited from wibox.widget.slider · 1 signal · 1 theme variable
The slider handle shape.

Usage example

See also:


Click to display more

Emit signals:

  • property::handle_shape When the handle_shape value changes.
    • self wibox.widget.slider The object which changed (useful when connecting many object to the same callback).
    • new_value shape The new value affected to the property.

Consumed theme variables:

Theme variable Usage
beautiful.slider_handle_shapeFallback when handle_shape isn't set.
handle_color color · Inherited from wibox.widget.slider · 1 signal · 1 theme variable
The slider handle color.

Usage example

Click to display more

Emit signals:

  • property::handle_color When the handle_color value changes.
    • self wibox.widget.slider The object which changed (useful when connecting many object to the same callback).
    • new_value handle_color The new value affected to the property.

Consumed theme variables:

Theme variable Usage
beautiful.slider_handle_colorFallback when handle_color isn't set.
handle_margins table · Inherited from wibox.widget.slider · 1 signal · 1 theme variable
The slider handle margins.

Usage example

Click to display more

Emit signals:

  • property::handle_margins When the handle_margins value changes.
    • self wibox.widget.slider The object which changed (useful when connecting many object to the same callback).
    • new_value margins The new value affected to the property.

Consumed theme variables:

Theme variable Usage
beautiful.slider_handle_marginsFallback when handle_margins isn't set.
handle_width number · Inherited from wibox.widget.slider · 1 signal · 1 theme variable
The slider handle width.

Usage example

Click to display more

Emit signals:

  • property::handle_width When the handle_width value changes.
    • self wibox.widget.slider The object which changed (useful when connecting many object to the same callback).
    • new_value handle_width The new value affected to the property.

Consumed theme variables:

Theme variable Usage
beautiful.slider_handle_widthFallback when handle_width isn't set.
handle_border_color color · Inherited from wibox.widget.slider · 1 signal · 1 theme variable
The handle border_color.

Usage example

Click to display more

Emit signals:

  • property::handle_border_color When the handle_border_color value changes.
    • self wibox.widget.slider The object which changed (useful when connecting many object to the same callback).
    • new_value handle_border_color The new value affected to the property.

Consumed theme variables:

Theme variable Usage
beautiful.slider_handle_border_colorFallback when handle_border_color isn't set.
handle_border_width number · Inherited from wibox.widget.slider · 1 signal · 1 theme variable
The handle border width.
Click to display more

Emit signals:

  • property::handle_border_width When the handle_border_width value changes.
    • self wibox.widget.slider The object which changed (useful when connecting many object to the same callback).
    • new_value handle_border_width The new value affected to the property.

Consumed theme variables:

Theme variable Usage
beautiful.slider_handle_border_widthFallback when handle_border_width isn't set.
bar_shape gears.shape · Inherited from wibox.widget.slider · 1 signal · 1 theme variable
The bar (background) shape.

Usage example

See also:


Click to display more

Emit signals:

  • property::bar_shape When the bar_shape value changes.
    • self wibox.widget.slider The object which changed (useful when connecting many object to the same callback).
    • new_value shape The new value affected to the property.

Consumed theme variables:

Theme variable Usage
beautiful.slider_bar_shapeFallback when bar_shape isn't set.
bar_height number · Inherited from wibox.widget.slider · 1 signal · 1 theme variable
The bar (background) height.

Usage example

Click to display more

Emit signals:

  • property::bar_height When the bar_height value changes.
    • self wibox.widget.slider The object which changed (useful when connecting many object to the same callback).
    • new_value bar_height The new value affected to the property.

Consumed theme variables:

Theme variable Usage
beautiful.slider_bar_heightFallback when bar_height isn't set.
bar_color color · Inherited from wibox.widget.slider · 1 signal · 1 theme variable
The bar (background) color.

Usage example

Click to display more

Emit signals:

  • property::bar_color When the bar_color value changes.
    • self wibox.widget.slider The object which changed (useful when connecting many object to the same callback).
    • new_value bar_color The new value affected to the property.

Consumed theme variables:

Theme variable Usage
beautiful.slider_bar_colorFallback when bar_color isn't set.
bar_active_color color · Inherited from wibox.widget.slider · 1 signal · 1 theme variable
The bar (active) color.

Usage example

Only works when both bar_active_color and bar_color are passed as hex color string

Click to display more

Emit signals:

  • property::bar_active_color When the bar_active_color value changes.
    • self wibox.widget.slider The object which changed (useful when connecting many object to the same callback).
    • new_value bar_active_color The new value affected to the property.

Consumed theme variables:

Theme variable Usage
beautiful.slider_bar_active_colorFallback when bar_active_color isn't set.
bar_margins table · Inherited from wibox.widget.slider · 1 signal · 1 theme variable
The bar (background) margins.

Usage example

Click to display more

Emit signals:

  • property::bar_margins When the bar_margins value changes.
    • self wibox.widget.slider The object which changed (useful when connecting many object to the same callback).
    • new_value margins The new value affected to the property.

Consumed theme variables:

Theme variable Usage
beautiful.slider_bar_marginsFallback when bar_margins isn't set.
bar_border_width number · Inherited from wibox.widget.slider · 1 signal
The bar (background) border width.
Click to display more

Emit signals:

  • property::bar_border_width When the bar_border_width value changes.
    • self wibox.widget.slider The object which changed (useful when connecting many object to the same callback).
    • new_value bar_border_width The new value affected to the property.
bar_border_color color · Inherited from wibox.widget.slider · 1 signal · 1 theme variable
The bar (background) border_color.

Usage example

Click to display more

Emit signals:

  • property::bar_border_color When the bar_border_color value changes.
    • self wibox.widget.slider The object which changed (useful when connecting many object to the same callback).
    • new_value bar_border_color The new value affected to the property.

Consumed theme variables:

Theme variable Usage
beautiful.slider_bar_border_colorFallback when bar_border_color isn't set.
value number · Inherited from wibox.widget.slider · 1 signal
The slider value.

Signal: property::value notify the value is changed.

Usage example

Click to display more

Emit signals:

  • property::value When the value value changes.
    • self wibox.widget.slider The object which changed (useful when connecting many object to the same callback).
    • new_value value The new value affected to the property.
minimum number · Inherited from wibox.widget.slider · 1 signal
The slider minimum value.
Click to display more

Emit signals:

  • property::minimum When the minimum value changes.
    • self wibox.widget.slider The object which changed (useful when connecting many object to the same callback).
    • new_value minimum The new value affected to the property.
maximum number · Inherited from wibox.widget.slider · 1 signal
The slider maximum value.
Click to display more

Emit signals:

  • property::maximum When the maximum value changes.
    • self wibox.widget.slider The object which changed (useful when connecting many object to the same callback).
    • new_value maximum The new value affected to the property.
children table · Inherited from wibox.widget.base
Get or set the children elements.

Type constraints:

  • children table The children.
all_children table · Inherited from wibox.widget.base
Get all direct and indirect children widgets. This will scan all containers recursively to find widgets Warning: This method it prone to stack overflow if there is a loop in the widgets hierarchy. A hierarchy loop is when a widget, or any of its children, contain (directly or indirectly) itself.

Type constraints:

  • children table The children.
forced_height number or nil · Inherited from wibox.widget.base
Force a widget height.

Type constraints:

  • height number or nil The height (nil for automatic)
forced_width number or nil · Inherited from wibox.widget.base
Force a widget width.

Type constraints:

  • width number or nil The width (nil for automatic)
opacity number · Inherited from wibox.widget.base
The widget opacity (transparency).

Type constraints:

  • opacity number The opacity (between 0 and 1) (default 1)
visible boolean · Inherited from wibox.widget.base
The widget visibility.
buttons table · Inherited from wibox.widget.base
The widget buttons.

The table contains a list of awful.button objects.

See also:

Theme variables

beautiful.slider_bar_border_width number · Inherited from wibox.widget.slider
The bar (background) border width.
beautiful.slider_bar_border_color color · Inherited from wibox.widget.slider
The bar (background) border color.
beautiful.slider_handle_border_color color · Inherited from wibox.widget.slider
The handle border_color.
beautiful.slider_handle_border_width number · Inherited from wibox.widget.slider
The handle border width.
beautiful.slider_handle_width number · Inherited from wibox.widget.slider
The handle width.
beautiful.slider_handle_color color · Inherited from wibox.widget.slider
The handle color.
beautiful.slider_handle_shape gears.shape · Inherited from wibox.widget.slider
The handle shape.

See also:

beautiful.slider_bar_shape gears.shape · Inherited from wibox.widget.slider
The bar (background) shape.

See also:

beautiful.slider_bar_height number · Inherited from wibox.widget.slider
The bar (background) height.
beautiful.slider_bar_margins table · Inherited from wibox.widget.slider
The bar (background) margins.
beautiful.slider_handle_margins table · Inherited from wibox.widget.slider
The slider handle margins.
beautiful.slider_bar_color color · Inherited from wibox.widget.slider
The bar (background) color.
beautiful.slider_bar_active_color color · Inherited from wibox.widget.slider
The bar (active) color.

Only works when both beautiful.slider_bar_color and beautiful.slider_bar_active_color are hex color strings

Object methods

:add_button (button) · Inherited from wibox.widget.base
Add a new awful.button to this widget.

Parameters:

  • button awful.button The button to add.
:emit_signal_recursive (signal_name, ...) · Inherited from wibox.widget.base

Emit a signal and ensure all parent widgets in the hierarchies also forward the signal.

This is useful to track signals when there is a dynamic set of containers and layouts wrapping the widget.

Note that this function has some flaws:

  1. The signal is only forwarded once the widget tree has been built. This happens after all currently scheduled functions have been executed. Therefore, it will not start to work right away.
  2. In case the widget is present multiple times in a single widget tree, this function will also forward the signal multiple times (once per upward tree path).
  3. If the widget is removed from the widget tree, the signal is still forwarded for some time, similar to the first case.

Parameters:

  • signal_name string
  • ... Other arguments
:index (widget[, recursive[, ...]]) -> (number, widget, table) · Inherited from wibox.widget.base
Get the index of a widget.

Parameters:

  • widget widget The widget to look for.
  • recursive boolean Recursively check accross the sub-widgets hierarchy. (optional)
  • ... widget Additional widgets to add at the end of the sub-widgets hierarchy "path". (optional)

Returns:

  1. number The widget index.
  2. widget The parent widget.
  3. table The hierarchy path between "self" and "widget".
:connect_signal (name, func) · Inherited from gears.object

Connect to a signal.

Usage example output:

In slot [obj]   nil nil nil
In slot [obj]   foo bar 42

Parameters:

  • name string The name of the signal.
  • func function The callback to call when the signal is emitted.

Usage:

    local o = gears.object{}
    -- Function can be attached to signals
    local function slot(obj, a, b, c)
        print('In slot', obj, a, b, c)
    end
    o:connect_signal('my_signal', slot)
    -- Emitting can be done without arguments. In that case, the object will be
    -- implicitly added as an argument.
    o:emit_signal 'my_signal'
    -- It is also possible to add as many random arguments are required.
    o:emit_signal('my_signal', 'foo', 'bar', 42)
    -- Finally, to allow the object to be garbage collected (the memory freed), it
    -- is necessary to disconnect the signal or use weak_connect_signal
    o:disconnect_signal('my_signal', slot)
    -- This time, the slot wont be called as it is no longer connected.
    o:emit_signal 'my_signal'
:weak_connect_signal (name, func) · Inherited from gears.object
Connect to a signal weakly.

This allows the callback function to be garbage collected and automatically disconnects the signal when that happens. Warning: Only use this function if you really, really, really know what you are doing.

Parameters:

  • name string The name of the signal.
  • func function The callback to call when the signal is emitted.
:disconnect_signal (name, func) · Inherited from gears.object
Disonnect from a signal.

Parameters:

  • name string The name of the signal.
  • func function The callback that should be disconnected.
:emit_signal (name, ...) · Inherited from gears.object
Emit a signal.

Parameters:

  • name string The name of the signal
  • ... Extra arguments for the callback functions. Each connected function receives the object as first argument and then any extra arguments that are given to emit_signal()

Signals

widget::layout_changed · Inherited from wibox.widget.base
When the layout (size) change. This signal is emitted when the previous results of :layout() and :fit() are no longer valid. Unless this signal is emitted, :layout() and :fit() must return the same result when called with the same arguments.

See also:

widget::redraw_needed · Inherited from wibox.widget.base
When the widget content changed. This signal is emitted when the content of the widget changes. The widget will be redrawn, it is not re-layouted. Put differently, it is assumed that :layout() and :fit() would still return the same results as before.

See also:

button::press · Inherited from wibox.widget.base
When a mouse button is pressed over the widget.

Arguments:

  • self table The current object instance itself.
  • lx number The horizontal position relative to the (0,0) position in the widget.
  • ly number The vertical position relative to the (0,0) position in the widget.
  • button number The button number.
  • mods table The modifiers (mod4, mod1 (alt), Control, Shift)
  • find_widgets_result The entry from the result of wibox.drawable:find_widgets for the position that the mouse hit.
    • drawable wibox.drawable The drawable containing the widget.
    • widget widget The widget being displayed.
    • hierarchy wibox.hierarchy The hierarchy managing the widget's geometry.
    • x number An approximation of the X position that the widget is visible at on the surface.
    • y number An approximation of the Y position that the widget is visible at on the surface.
    • width number An approximation of the width that the widget is visible at on the surface.
    • height number An approximation of the height that the widget is visible at on the surface.
    • widget_width number The exact width of the widget in its local coordinate system.
    • widget_height number The exact height of the widget in its local coordinate system.

See also:

button::release · Inherited from wibox.widget.base
When a mouse button is released over the widget.

Arguments:

  • self table The current object instance itself.
  • lx number The horizontal position relative to the (0,0) position in the widget.
  • ly number The vertical position relative to the (0,0) position in the widget.
  • button number The button number.
  • mods table The modifiers (mod4, mod1 (alt), Control, Shift)
  • find_widgets_result The entry from the result of wibox.drawable:find_widgets for the position that the mouse hit.
    • drawable wibox.drawable The drawable containing the widget.
    • widget widget The widget being displayed.
    • hierarchy wibox.hierarchy The hierarchy managing the widget's geometry.
    • x number An approximation of the X position that the widget is visible at on the surface.
    • y number An approximation of the Y position that the widget is visible at on the surface.
    • width number An approximation of the width that the widget is visible at on the surface.
    • height number An approximation of the height that the widget is visible at on the surface.
    • widget_width number The exact width of the widget in its local coordinate system.
    • widget_height number The exact height of the widget in its local coordinate system.

See also:

mouse::enter · Inherited from wibox.widget.base
When the mouse enter a widget.

Arguments:

  • self table The current object instance itself.
  • find_widgets_result The entry from the result of wibox.drawable:find_widgets for the position that the mouse hit.
    • drawable wibox.drawable The drawable containing the widget.
    • widget widget The widget being displayed.
    • hierarchy wibox.hierarchy The hierarchy managing the widget's geometry.
    • x number An approximation of the X position that the widget is visible at on the surface.
    • y number An approximation of the Y position that the widget is visible at on the surface.
    • width number An approximation of the width that the widget is visible at on the surface.
    • height number An approximation of the height that the widget is visible at on the surface.
    • widget_width number The exact width of the widget in its local coordinate system.
    • widget_height number The exact height of the widget in its local coordinate system.

See also:

mouse::leave · Inherited from wibox.widget.base
When the mouse leave a widget.

Arguments:

  • self table The current object instance itself.
  • find_widgets_result The entry from the result of wibox.drawable:find_widgets for the position that the mouse hit.
    • drawable wibox.drawable The drawable containing the widget.
    • widget widget The widget being displayed.
    • hierarchy wibox.hierarchy The hierarchy managing the widget's geometry.
    • x number An approximation of the X position that the widget is visible at on the surface.
    • y number An approximation of the Y position that the widget is visible at on the surface.
    • width number An approximation of the width that the widget is visible at on the surface.
    • height number An approximation of the height that the widget is visible at on the surface.
    • widget_width number The exact width of the widget in its local coordinate system.
    • widget_height number The exact height of the widget in its local coordinate system.

See also:

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