Class wibox.layout.stack

A stacked layout.

This layout display widgets on top of each other. It can be used to overlay a wibox.widget.textbox on top of a awful.widget.progressbar or manage “pages” where only one is visible at any given moment.

The indices are going from 1 (the bottom of the stack) up to the top of the stack. The order can be changed either using :swap or :raise.

Usage example

Usage:

    wibox.widget {
        generic_widget( 'first'  ),
        generic_widget( 'second' ),
        generic_widget( 'third'  ),
        layout  = wibox.layout.stack
    }
    

Info:

  • Copyright: 2016 Emmanuel Lepage Vallee
  • Author: Emmanuel Lepage Vallee

Functions

wibox.layout.stack () Create a new stack layout.

Object properties

wibox.layout.stack.children Get all direct children of this layout.
wibox.layout.stack.spacing Add spacing between each layout widgets
wibox.layout.stack.top_only If only the first stack widget is drawn
wibox.layout.stack.forced_height Force a widget height.
wibox.layout.stack.forced_width Force a widget width.
wibox.layout.stack.opacity The widget opacity (transparency).
wibox.layout.stack.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.

Methods

wibox.layout.stack:set (index, widget2) Set a widget at a specific index, replace the current one.
wibox.layout.stack:replace_widget (widget, widget2[, recursive=false]) Replace the first instance of widget in the layout with widget2.
wibox.layout.stack:swap (index1, index2) Swap 2 widgets in a layout.
wibox.layout.stack:swap_widgets (widget1, widget2[, recursive=false]) Swap 2 widgets in a layout.
wibox.layout.stack:reset (layout) Reset a ratio layout.
wibox.layout.stack:add (layout, ...) Add some widgets to the given stack layout
wibox.layout.stack:remove (The) Remove a widget from the layout
wibox.layout.stack:insert (index, widget) Insert a new widget in the layout at position index
wibox.layout.stack:remove_widgets (widget) Remove one or more widgets from the layout The last parameter can be a boolean, forcing a recursive seach of the widget(s) to remove.
wibox.layout.stack:raise (index) Raise a widget at index to the top of the stack
wibox.layout.stack:raise_widget (widget[, recursive=false]) Raise the first instance of widget
wibox.layout.stack:index (widget[, recursive[, ...]]) Get a widex index.
wibox.layout.stack:get_all_children () Get all direct and indirect children widgets.
wibox.layout.stack:setup (args) Set a declarative widget hierarchy description.
wibox.layout.stack:buttons (_buttons) Set/get a widget’s buttons.
wibox.layout.stack:emit_signal_recursive (signal_name, ...) Emit a signal and ensure all parent widgets in the hierarchies also forward the signal.
wibox.layout.stack:disconnect_signal (name, func) Disconnect to a signal.
wibox.layout.stack:emit_signal (name, ...) Emit a signal.
wibox.layout.stack:connect_signal (name, func) Connect to a signal.
wibox.layout.stack:weak_connect_signal (name, func) Connect to a signal weakly.


Functions

Methods
wibox.layout.stack ()
Create a new stack layout.

Returns:

    widget A new stack layout

Object properties

wibox.layout.stack.children
Get all direct children of this layout.

Type:

  • layout The layout you are modifying.
wibox.layout.stack.spacing
Add spacing between each layout widgets

Type:

  • spacing number Spacing between widgets.
wibox.layout.stack.top_only
If only the first stack widget is drawn
wibox.layout.stack.forced_height
Force a widget height.

Type:

  • height number or nil The height (nil for automatic)
wibox.layout.stack.forced_width
Force a widget width.

Type:

  • width number or nil The width (nil for automatic)
wibox.layout.stack.opacity
The widget opacity (transparency).

Type:

  • opacity number The opacity (between 0 and 1) (default 1)
wibox.layout.stack.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
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:

Methods

wibox.layout.stack:set (index, widget2)
Set a widget at a specific index, replace the current one. Signal: widget::replaced The argument is the new widget and the old one and the index.
  • index number A widget or a widget index
  • widget2 The widget to take the place of the first one

Returns:

    boolean If the operation is successful
wibox.layout.stack:replace_widget (widget, widget2[, recursive=false])
Replace the first instance of widget in the layout with widget2. Signal: widget::replaced The argument is the new widget and the old one and the index.
  • widget The widget to replace
  • widget2 The widget to replace widget with
  • recursive boolean Digg in all compatible layouts to find the widget. (default false)

Returns:

    boolean If the operation is successful
wibox.layout.stack:swap (index1, index2)
Swap 2 widgets in a layout. Signal: widget::swapped The arguments are both widgets and both (new) indexes.
  • index1 number The first widget index
  • index2 number The second widget index

Returns:

    boolean If the operation is successful
wibox.layout.stack:swap_widgets (widget1, widget2[, recursive=false])
Swap 2 widgets in a layout. If widget1 is present multiple time, only the first instance is swapped Signal: widget::swapped The arguments are both widgets and both (new) indexes. if the layouts not the same, then only widget::replaced will be emitted.
  • widget1 The first widget
  • widget2 The second widget
  • recursive boolean Digg in all compatible layouts to find the widget. (default false)

Returns:

    boolean If the operation is successful
wibox.layout.stack:reset (layout)
Reset a ratio layout. This removes all widgets from the layout. Signal: widget::reset
  • layout The layout you are modifying.
wibox.layout.stack:add (layout, ...)
Add some widgets to the given stack layout
  • layout The layout you are modifying.
  • ... widget Widgets that should be added (must at least be one)
wibox.layout.stack:remove (The)
Remove a widget from the layout
  • The index widget index to remove

Returns:

    boolean index If the operation is successful
wibox.layout.stack:insert (index, widget)
Insert a new widget in the layout at position index
  • index number The position
  • widget The widget

Returns:

    boolean If the operation is successful
wibox.layout.stack:remove_widgets (widget)
Remove one or more widgets from the layout The last parameter can be a boolean, forcing a recursive seach of the widget(s) to remove.
  • widget … Widgets that should be removed (must at least be one)

Returns:

    boolean If the operation is successful
wibox.layout.stack:raise (index)
Raise a widget at index to the top of the stack
  • index number the widget index to raise
wibox.layout.stack:raise_widget (widget[, recursive=false])
Raise the first instance of widget
  • widget The widget to raise
  • recursive boolean Also look deeper in the hierarchy to find the widget (default false)
wibox.layout.stack: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.layout.stack: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.layout.stack:setup (args)
Set a declarative widget hierarchy description. See The declarative layout system
  • args An array containing the widgets disposition
wibox.layout.stack:buttons (_buttons)
Set/get a widget’s buttons.
  • _buttons The table of buttons that should bind to the widget.
wibox.layout.stack: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.layout.stack:disconnect_signal (name, func)
Disconnect to a signal.
  • name string The name of the signal
  • func function The callback that should be disconnected
wibox.layout.stack: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.layout.stack: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.layout.stack: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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