awesome API documentation

# Class `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
    }

### Info:

- Copyright: 2012 Emmanuel Lepage Vallee
- Author: Emmanuel Lepage Valle

## Object properties

wibox.widget.piechart.data_list | The pie chart data list.
wibox.widget.piechart.data | The pie chart data.
wibox.widget.piechart.border_color | The border color.
wibox.widget.piechart.border_width | The pie elements border width.
wibox.widget.piechart.colors | The pie chart colors.
wibox.widget.piechart.display_labels | If the pie chart has labels.
wibox.widget.piechart.forced_height | Force a widget height.
wibox.widget.piechart.forced_width | Force a widget width.
wibox.widget.piechart.opacity | The widget opacity (transparency).
wibox.widget.piechart.visible | The widget visibility.

## Signals

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

## Theme variables

beautiful.piechart_border_color | The border color.
beautiful.piechart_border_width | The pie elements border width.
beautiful.piechart_colors | The pie chart colors.

## Methods

wibox.widget.piechart:index (widget[, recursive[, ...]]) | Get a widex index.
wibox.widget.piechart:get_all_children () | Get all direct and indirect children widgets.
wibox.widget.piechart:setup (args) | Set a declarative widget hierarchy description.
wibox.widget.piechart:buttons (_buttons) | Set/get a widget's buttons.
wibox.widget.piechart:emit_signal_recursive (signal_name, ...) | Emit a signal and ensure all parent widgets in the hierarchies also forward the signal.
wibox.widget.piechart:disconnect_signal (name, func) | Disconnect to a signal.
wibox.widget.piechart:emit_signal (name, ...) | Emit a signal.
wibox.widget.piechart:connect_signal (name, func) | Connect to a signal.
wibox.widget.piechart:weak_connect_signal (name, func) | Connect to a signal weakly.

## Object properties

wibox.widget.piechart.data_list
  The pie chart data list.

  ### Type:

  - data_list table Sorted table where each entry has a label as its first value and a number as its second value.
wibox.widget.piechart.data
  The pie chart data.

  ### Type:

  - data table Labels as keys and number as value.
wibox.widget.piechart.border_color
  The border color. If none is set, it will use current foreground (text) color.

  ### Type:

  - color

  ### See also:

  gears.color
wibox.widget.piechart.border_width
  The pie elements border width.

  ### Type:

  - border_width number (default 1)
wibox.widget.piechart.colors
  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:

  - colors table A table of colors, one for each elements

  ### See also:

  gears.color
wibox.widget.piechart.display_labels
  If the pie chart has labels.

  ### Type:

  - boolean (default true)
wibox.widget.piechart.forced_height
  Force a widget height.

  ### Type:

  - height number or nil The height (`nil` for automatic)
wibox.widget.piechart.forced_width
  Force a widget width.

  ### Type:

  - width number or nil The width (`nil` for automatic)
wibox.widget.piechart.opacity
  The widget opacity (transparency).

  ### Type:

  - opacity number The opacity (between 0 and 1) (default 1)
wibox.widget.piechart.visible
  The widget visibility.

  ### Type:

  - boolean

## Signals

widget::layout_changed
  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
widget::redraw_needed
  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
button::press
  When a mouse button is pressed over the widget.

  ### Arguments:

  - 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
button::release
  When a mouse button is released over the widget.

  ### Arguments:

  - 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
mouse::enter
  When the mouse enter a widget.

  ### Arguments:

  - 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
mouse::leave
  When the mouse leave a widget.

  ### Arguments:

  - 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

## Theme variables

beautiful.piechart_border_color
  The border color. If none is set, it will use current foreground (text) color.

  ### Type:

  - color

  ### See also:

  gears.color
beautiful.piechart_border_width
  The pie elements border width.

  ### Type:

  - border_width number (default 1)
beautiful.piechart_colors
  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:

  - colors table A table of colors, one for each elements

  ### See also:

  gears.color

## Methods

wibox.widget.piechart:index (widget[, recursive[, ...]])
  Get a widex index.
  - widget The widget to look for
  - recursive Also check sub-widgets (optional)
  - ... Aditional widgets to add at the end of the \"path\" (optional)

  ### Returns:

  1. The index
  2. The parent layout
  3. The path between \"self\" and \"widget\"
wibox.widget.piechart:get_all_children ()
  Get all direct and indirect children widgets. This will scan all containers recursively to find widgets Warning: This method it prone to stack overflow id the widget, or any of its children, contain (directly or indirectly) itself.

  ### Returns:

  table The children
wibox.widget.piechart:setup (args)
  Set a declarative widget hierarchy description. See The declarative layout system
  - args An array containing the widgets disposition
wibox.widget.piechart:buttons (_buttons)
  Set/get a widget's buttons.
  - _buttons The table of buttons that should bind to the widget.
wibox.widget.piechart:emit_signal_recursive (signal_name, ...)
  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.
  - signal_name string
  - ... Other arguments
wibox.widget.piechart:disconnect_signal (name, func)
  Disconnect to a signal.
  - name string The name of the signal
  - func function The callback that should be disconnected
wibox.widget.piechart:emit_signal (name, ...)
  Emit a signal.
  - 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()
wibox.widget.piechart:connect_signal (name, func)
  Connect to a signal.
  - name string The name of the signal
  - func function The callback to call when the signal is emitted
wibox.widget.piechart:weak_connect_signal (name, func)
  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.

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

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