Class wibox.container.arcchart
A circular chart (arc chart).
 It can contain a central widget (or not) and display multiple values.

    Info:
    
        - Copyright: 2013 Emmanuel Lepage Vallee
- Author: Emmanuel Lepage Vallee <elv1313@gmail.com>
    
    Methods
    
    - 
    
    wibox.container.arcchart ([widget])
    
- 
    Returns a new arcchart layout.
    
        - widget
         The widget to display.
         (optional)
        
 
    - 
    
    widget
    
- 
    The widget to wrap in a radial proggressbar.
    Type:
- 
    
    paddings
    
- 
    The padding between the outline and the progressbar. 
  
 Type:
        - paddings A number or a table
        
        - top
            number
         (default 0)
        
- bottom
            number
         (default 0)
        
- left
            number
         (default 0)
        
- right
            number
         (default 0)
        
 
 
- 
    
    border_color
    
- 
    The border background color.
- 
    
    colors
    
- 
    The arcchart values foreground colors.
    Type:
        - values
            table
         An ordered set of colors for each value in arcchart.
        
 
- 
    
    border_width
    
- 
    The border width. 
  
 Type:
        - border_width
            number
         (default 3)
        
 
- 
    
    min_value
    
- 
    The minimum value.
- 
    
    max_value
    
- 
    The maximum value.
- 
    
    bg
    
- 
    The radial background. 
  
 Type:See also:
- 
    
    value
    
- 
    The value. 
  
 Type:
        - value
            number
         Between minvalue and maxvalue
        
 See also:
- 
    
    values
    
- 
    The values.
 The arcchart is designed to display multiple values at once. Each will be
 shown in table order.
    Type:
        - values
            table
         An ordered set of values.
        
 See also:
- 
    
    rounded_edge
    
- 
    If the chart has rounded edges. 
  
 Type:
- 
    
    thickness
    
- 
    The arc thickness. 
  
 Type:
- 
    
    start_angle
    
- 
    The (radiant) angle where the first value start. 
  
 Type:
        - number
         A number between 0 and 2*math.pi
         (default math.pi)
        
 
- 
    
    forced_height
    
- 
    Force a widget height.
    Type:
        - height
            number or nil
         The height (nilfor automatic)
 
- 
    
    forced_width
    
- 
    Force a widget width.
    Type:
        - width
            number or nil
         The width (nilfor automatic)
 
- 
    
    opacity
    
- 
    The widget opacity (transparency).
    Type:
        - opacity
            number
         The opacity (between 0 and 1)
         (default 1)
        
 
- 
    
    visible
    
- 
    The widget visibility.
    Type:
    - 
    
    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
    
- 
    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
    
- 
    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:
- 
    
    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::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::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:
    - 
    
    beautiful.arcchart_border_color
    
- 
    The progressbar border background color.
- 
    
    beautiful.arcchart_color
    
- 
    The progressbar foreground color.
- 
    
    beautiful.arcchart_border_width
    
- 
    The progressbar border width.
- 
    
    beautiful.arcchart_paddings
    
- 
    The padding between the outline and the progressbar.
    Type:
        - paddings A number or a table
        
        - top
            number
         (default 0)
        
- bottom
            number
         (default 0)
        
- left
            number
         (default 0)
        
- right
            number
         (default 0)
        
 
 
- 
    
    beautiful.arcchart_thickness
    
- 
    The arc thickness.
    Type:
    - 
    
    wibox.container.arcchart:get_children ()
    
- 
    Get the children elements.
    Returns:
           table
        The children
     
- 
    
    wibox.container.arcchart:set_children (children)
    
- 
    Replace the layout children
 This layout only accept one children, all others will be ignored
    
        - children
            table
         A table composed of valid widgets
        
 
- 
    
    wibox.container.arcchart:reset ()
    
- 
    Reset this layout.  The widget will be removed and the rotation reset.
- 
    
    wibox.container.arcchart: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.container.arcchart:setup (args)
    
- 
    Set a declarative widget hierarchy description.
 See The declarative layout system
    
        - args
         An array containing the widgets disposition
        
 
- 
    
    wibox.container.arcchart:buttons (_buttons)
    
- 
    Set/get a widget's buttons.
    
        - _buttons
         The table of buttons that should bind to the widget.
        
 
- 
    
    wibox.container.arcchart: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.container.arcchart: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.container.arcchart: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.container.arcchart: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.