Module: wibox.widget.piechart

Display percentage in a circle.

Note that this widget makes no attempts to prevent overlapping labels or labels drawn outside of the widget boundaries.

Usage:

    wibox.widget {
        data_list = {
            { 'L1', 100 },
            { 'L2', 200 },
            { 'L3', 300 },
        },
        border_width = 1,
        colors = {
            beautiful.bg_normal,
            beautiful.bg_highlight,
            beautiful.border_color,
        },
        widget = wibox.widget.piechart
    }
    

Class Hierarchy

Info:

  • Copyright: 2012 Emmanuel Lepage Vallee
  • Originally authored by: Emmanuel Lepage Valle
    (Full contributors list available on our github project)

Constructors

wibox.widget.piechart (data_list) Create a new piechart.

Object properties

data_list table The pie chart data list.
data table The pie chart data.
border_color color or nil The border color.
border_width number or nil The pie elements border width.
colors table or nil The pie chart colors.
display_labels boolean If the pie chart has labels.
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.piechart_border_color color The border color.
beautiful.piechart_border_width number The pie elements border width.
beautiful.piechart_colors table The pie chart colors.

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) Disconnect 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


Constructors

🔗 wibox.widget.piechart (data_list)
Create a new piechart.

Parameters:

Name Type(s) Description
data_list table The data.

Object properties

🔗 data_list table · 1 signal
The pie chart data list.

Constraints:

Default value : {}
Table content: : Sorted list where each entry has a label as its first value and a number as its second value.
1 (string) : The label.
2 (number) : The value.

Click to display more

Emit signals:

  • property::data_list When the data_list value changes.
    • self wibox.widget.piechart The object which changed (useful when connecting many object to the same callback).
🔗 data table · 1 signal
The pie chart data.

Constraints:

Default value : {}
Table content: : Key/value pair.
key (string) : The label.
value (number) : The value.

See also:

data_list The pie chart data list. object properties

Click to display more

Emit signals:

  • property::data When the data value changes.
    • self wibox.widget.piechart The object which changed (useful when connecting many object to the same callback).
🔗 border_color color or nil · 1 signal · 1 theme variable
The border color.

If none is set, it will use current foreground (text) color.

Constraints:

Default value : beautiful.wibox_widget_piechart_border_color
Type description:
string : An hexadecimal color code, such as "#ff0000" for red.
string : A color name, such as "red".
table : A gradient table.
cairo.pattern : Any valid Cairo pattern.
cairo.pattern : A texture build from an image by gears.color.create_png_pattern
nil : Fallback to the current value of beautiful.piechart_border_color.

See also:

gears.color This module simplifies the creation of cairo pattern objects. module

Click to display more

Emit signals:

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

Consumed theme variables:

Theme variable Usage
beautiful.piechart_border_colorFallback when border_color isn't set.
🔗 border_width number or nil · 1 signal · 1 theme variable
The pie elements border width.

Constraints:

Default value : 1
Type description:
nil : Fallback to the current value of beautiful.piechart_border_width.
Unit : pixel
Negative allowed : false

Click to display more

Emit signals:

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

Consumed theme variables:

Theme variable Usage
beautiful.piechart_border_widthFallback when border_width isn't set.
🔗 colors table or nil · 1 signal · 1 theme variable
The pie chart colors.

If no color is set, only the border will be drawn. If less colors than required are set, colors will be re-used in order.

Constraints:

Default value : beautiful.wibox_widget_piechart_colors
Type description:
table : List of colors (numerical keys).
nil : Fallback to the current value of beautiful.piechart_colors.
Valid values : A table of colors, one for each elements.

See also:

gears.color This module simplifies the creation of cairo pattern objects. module

Click to display more

Emit signals:

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

Consumed theme variables:

Theme variable Usage
beautiful.piechart_colorsFallback when colors isn't set.
🔗 display_labels boolean · 1 signal
If the pie chart has labels.

Constraints:

Default value : true
Valid values : true or false.

Click to display more

Emit signals:

🔗 children table · Inherited from wibox.widget.base
Get or set the children elements.

Constraints:

Default value : {}
Table content : A list of wibox.widget.

See also:

wibox.widget.base.all_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.

Constraints:

Default value : {}
Table content : A list of wibox.widget.

See also:

wibox.widget.base.children
🔗 forced_height number or nil · Inherited from wibox.widget.base
Force a widget height.

Constraints:

Default value : nil
Type description:
nil : Let the layout decide the height. Usually using the widget native height.
number : Enforce a number of pixels.
Unit : pixel
Negative allowed : false

See also:

wibox.widget.base.forced_width
🔗 forced_width number or nil · Inherited from wibox.widget.base
Force a widget width.

Constraints:

Default value : nil
Type description:
nil : Let the layout decide the width. Usually using the widget native width.
number : Enforce a number of pixels.
Unit : pixel
Negative allowed : false

See also:

wibox.widget.base.forced_height
🔗 opacity number · Inherited from wibox.widget.base
The widget opacity (transparency).

Constraints:

Default value : 1.0
Unit : A gradient between transparent (0.0) and opaque (1.0).
Minimum value : 0.0
Maximum value : 1.0

See also:

wibox.widget.base.visible
🔗 visible boolean · Inherited from wibox.widget.base
The widget visibility.

Constraints:

Default value : true
Valid values : true or false.

See also:

wibox.widget.base.opacity
🔗 buttons table · Inherited from wibox.widget.base
The widget buttons.

The table contains a list of awful.button objects.

Constraints:

Default value : {}
Table content : A list of awful.button.

See also:

awful.button Create easily new buttons objects ignoring certain modifiers. module

Theme variables

🔗 beautiful.piechart_border_color color
The border color.

If none is set, it will use current foreground (text) color.

See also:

gears.color This module simplifies the creation of cairo pattern objects. module

Click to display more

Used by:

🔗 beautiful.piechart_border_width number
The pie elements border width.
Click to display more

Used by:

🔗 beautiful.piechart_colors table
The pie chart colors.

If no color is set, only the border will be drawn. If less colors than required are set, colors will be re-used in order.

Type constraints:

Name Type(s) Description
colors table A table of colors, one for each elements

See also:

gears.color This module simplifies the creation of cairo pattern objects. module

Click to display more

Used by:

  • colors The pie chart colors.

Object methods

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

Parameters:

Name Type(s) Description
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:

Name Type(s) Description
signal_name string
... Other arguments
🔗 :index (widget, recursive, ...) -> (number, widget, table) · Inherited from wibox.widget.base
Get the index of a widget.

Parameters:

Name Type(s) Description
widget widget The widget to look for.
recursive Optional boolean Recursively check accross the sub-widgets hierarchy.
... Optional widget Additional widgets to add at the end of the sub-widgets hierarchy "path".

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 Type(s) Description
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 Type(s) Description
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
Disconnect from a signal.

Parameters:

Name Type(s) Description
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 Type(s) Description
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 When the widget content changed. signals
🔗 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:

widget::layout_changed When the layout (size) change. signals
🔗 button::press · Inherited from wibox.widget.base
When a mouse button is pressed over the widget.

Arguments:

Name Type(s) Description
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 table The entry from the result of wibox: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 Manipulate and inspect the mouse cursor. module
🔗 button::release · Inherited from wibox.widget.base
When a mouse button is released over the widget.

Arguments:

Name Type(s) Description
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 table The entry from the result of wibox: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 Manipulate and inspect the mouse cursor. module
🔗 mouse::enter · Inherited from wibox.widget.base
When the mouse enter a widget.

Arguments:

Name Type(s) Description
self table The current object instance itself.
find_widgets_result table The entry from the result of wibox: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 Manipulate and inspect the mouse cursor. module
🔗 mouse::leave · Inherited from wibox.widget.base
When the mouse leave a widget.

Arguments:

Name Type(s) Description
self table The current object instance itself.
find_widgets_result table The entry from the result of wibox: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 Manipulate and inspect the mouse cursor. module
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