Module: wibox.container.background

A container capable of changing the background color, foreground color and widget shape.

Usage example

Class Hierarchy

Info:

  • Copyright: 2010 Uli Schlachter
  • Originally authored by: Uli Schlachter
    (Full contributors list available on our github project)

Constructors

wibox.container.background ([widget[, bg[, shape]]]) Returns a new background container.

Object properties

widget widget The widget displayed in the background widget.
bg color The background color/pattern/gradient to use.
fg color The foreground (text) color/pattern/gradient to use.
shape gears.shape or function The background shape.
border_width number Add a border of a specific width.
border_color color Set the color for the border.
border_strategy string How the border width affects the contained widget.
bgimage string or surface or function The background image to use.
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

Deprecated object properties

shape_border_width number When a shape is set, also draw a border.
shape_border_color color When a shape is set, also draw a border.

Object methods

:set_shape (shape) Set the background shape.
: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


Constructors

wibox.container.background ([widget[, bg[, shape]]])
Returns a new background container.

A background container applies a background and foreground color to another widget.

Parameters:

  • widget widget The widget to display. (optional)
  • bg color The background to use for that widget. (optional)
  • shape gears.shape or function A gears.shape compatible shape function (optional)

Object properties

widget widget
The widget displayed in the background widget.

Type constraints:

  • widget widget The widget to be disaplayed inside of the background area.
bg color · 1 signal
The background color/pattern/gradient to use.

Usage example

Type constraints:

  • bg color A color string, pattern or gradient

See also:

Usage:

    local text_widget = {
    text   = "Hello world!",
    widget = wibox.widget.textbox
}
parent : setup {
    {
        text_widget,
        bg     = '#ff0000',
        widget = wibox.container.background
    },
    {
        text_widget,
        bg     = '#00ff00',
        widget = wibox.container.background
    },
    {
        text_widget,
        bg     = '#0000ff',
        widget = wibox.container.background
    },
    spacing = 10,
    layout  = wibox.layout.fixed.vertical
}

Click to display more

Emit signals:

  • property::bg When the bg value changes.
    • self wibox.container.background The object which changed (useful when connecting many object to the same callback).
    • new_value bg The new value affected to the property.
fg color · 1 signal
The foreground (text) color/pattern/gradient to use.

Usage example

Type constraints:

  • fg color A color string, pattern or gradient

See also:

Usage:

    local text_widget = {
    text   = "Hello world!",
    widget = wibox.widget.textbox
}
parent : setup {
    {
        text_widget,
        fg     = '#ff0000',
        widget = wibox.container.background
    },
    {
        text_widget,
        fg     = '#00ff00',
        widget = wibox.container.background
    },
    {
        text_widget,
        fg     = '#0000ff',
        widget = wibox.container.background
    },
    spacing = 10,
    layout  = wibox.layout.fixed.vertical
}

Click to display more

Emit signals:

  • property::fg When the fg value changes.
    • self wibox.container.background The object which changed (useful when connecting many object to the same callback).
    • new_value fg The new value affected to the property.
shape gears.shape or function
The background shape.

Use set_shape to set additional shape paramaters.

Usage example

Type constraints:

  • shape gears.shape or function A function taking a context, width and height as arguments

See also:

Usage:

    parent : setup {
    {
        -- Adding a shape without margin may result in cropped output
        {
            text   = "Hello world!",
            widget = wibox.widget.textbox
        },
        shape              = gears.shape.hexagon,
        bg                 = beautiful.bg_normal,
        shape_border_color = beautiful.border_color,
        shape_border_width = beautiful.border_width,
        widget             = wibox.container.background
    },
    {
        -- To solve this, use a margin
        {
            {
                text   = "Hello world!",
                widget = wibox.widget.textbox
            },
            left   = 10,
            right  = 10,
            top    = 3,
            bottom = 3,
            widget = wibox.container.margin
        },
        shape        = gears.shape.hexagon,
        bg           = beautiful.bg_normal,
        border_color = beautiful.border_color,
        border_width = beautiful.border_width,
        widget       = wibox.container.background
    },
    spacing = 10,
    layout  = wibox.layout.fixed.vertical
}
border_width number · 1 signal
Add a border of a specific width.

If the shape is set, the border will also be shaped.

See wibox.container.background.shape for an usage example.

Type constraints:

  • width number The border width. (default 0)

See also:


Click to display more

Emit signals:

  • property::border_width When the border_width value changes.
    • self wibox.container.background The object which changed (useful when connecting many object to the same callback).
    • new_value width The new value affected to the property.
border_color color · 1 signal · 1 theme variable
Set the color for the border.

See wibox.container.background.shape for an usage example.

Type constraints:

  • fg color The border color, pattern or gradient (default self._private.foreground)

See also:


Click to display more

Emit signals:

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

Consumed theme variables:

Theme variable Usage
beautiful.fg_normalFallback when 'fg' and border_color aren't set.
border_strategy string

How the border width affects the contained widget.

The valid values are:

  • none: Just apply the border, do not affect the content size (default).
  • inner: Squeeze the size of the content by the border width.
bgimage string or surface or function
The background image to use.

If image is a function, it will be called with (context, cr, width, height) as arguments. Any other arguments passed to this method will be appended.

Type constraints:

  • image string, surface or function A background image or a function

See also:

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:

Deprecated object properties

shape_border_width number
When a shape is set, also draw a border.

See wibox.container.background.shape for an usage example.

Type constraints:

  • width number The border width

See also:

shape_border_color color · 1 theme variable
When a shape is set, also draw a border.

See wibox.container.background.shape for an usage example.

Type constraints:

  • fg color The border color, pattern or gradient (default self._private.foreground)

See also:


Click to display more

Consumed theme variables:

Theme variable Usage
beautiful.fg_normalFallback when 'fg' and border_color aren't set.

Object methods

:set_shape (shape) · 1 signal
Set the background shape.

Any other arguments will be passed to the shape function.

Parameters:

  • shape gears.shape or function A function taking a context, width and height as arguments

See also:


Click to display more

Emit signals:

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