(Widget) Window Switcher

Window Switcher Widget

The Window Switcher is a fast, lightweight popup widget designed to let you easily cycle through and focus your currently open applications. It acts as a highly customizable, mouse-and-keyboard friendly alternative to the built-in Windows Alt-Tab menu.

Options

Name	Type	Default	Description
label	string	"\uf2d2"	The icon or text displayed on the status bar.
label_alt	string	""	The alternate label.
icon_size	int	48	The size of the application icons.
max_visible_apps	int	5	The maximum number of apps to show before enabling scrolling.
show_title	boolean	true	Whether to display the focused app's title below the icons.
callbacks	object	See below	Defines widget interaction actions.
popup	object	See below	Defines popup styling and positioning.
keybindings	list	[]	Optional hotkeys. See Keybindings.

Callbacks

Option	Type	Default	Action
on_left	string	"toggle_window_switcher"	Toggles the window switcher.
on_middle	string	"do_nothing"	Optional action.
on_right	string	"do_nothing"	Optional action.

Popup

Contains the styling parameters for the window switcher interface.

Name	Type	Default	Description
blur	boolean	true	Apply blur to the popup background.
round_corners	boolean	true	Apply rounded corners to the popup.
round_corners_type	string	"normal"	The type of rounded corners (normal or small).
border_color	string	"System"	Border color.
dark_mode	boolean	true	Apply dark mode to the popup.

Keyboard Navigation

When the popup is open, you can use the keyboard to navigate:

• Left: Move to the previous window.
• Right: Move to the next window.
• Enter/Space: Select and switch to the currently focused window.
• Delete: Close the selected window application.
• Escape: Close the window switcher without changing focus.

Usage

Add the widget configuration to your config.yaml:

widgets:
  window_switcher:
    type: "yasb.window_switcher.WindowSwitcherWidget"
    options:
      label: "<span>\uf2d2</span>"
      icon_size: 48
      max_visible_apps: 5
      show_title: true
      keybindings:
        - keys: "alt+w"
          action: "toggle_window_switcher"
          screen: "cursor"

Note: Layout & Quality Notes:

• Icon Blurriness: If you set icon_size to a very large value (e.g., 80 or 128), some application icons might appear blurry or pixelated. This is because many applications do not embed high-resolution icons in their .exe files (often maxing out at 64x64). The widget extracts the absolute highest quality icon natively available, but if the app doesn't provide a large one, the image must be stretched.
• Dynamic Screen Width: The widget is fully screen-aware. To prevent the popup from bleeding off your monitor when using huge icons or a high max_visible_apps limit, the popup will dynamically cap its maximum width to 90% of your screen and allow you to smoothly scroll through the remaining icons.

CSS Example

Because this is a really simple widget, all of the styling classes used by the widget and its components are included in this example below. You can use this as a starting point for styling the window switcher overlay in your styles.css.

.window-switcher-widget {}
.window-switcher-widget .label {}
.window-switcher-widget .icon {
    font-family: "JetBrainsMono NFP"
}

/* Styling for the popup container */
.window-switcher-popup {
    background-color: rgba(18, 19, 20, 0.4);
    padding: 10px;
}
/* Styling for each window item */
.window-switcher-popup .item {
    background-color: rgba(255, 255, 255, 0);
    border-radius: 8px;
    margin: 5px;
    padding: 10px;
    cursor: pointer;
    border: 1px solid transparent
}
/* Hover or keyboard-focus effect */
.window-switcher-popup .item:hover,
.window-switcher-popup .item.active {
    background-color: rgba(255, 255, 255, 0.07);
    border: 1px solid rgba(255, 255, 255, 0.07);
}
/* Window title text styling */
.window-switcher-popup .title {
    padding: 10px 10px 5px 10px;
    color: #ffffff;
    font-size: 12px;
    font-weight: 600;
    margin-top: 10px;
    border-top: 1px solid rgba(255, 255, 255, 0.158);
}

Preview of the Widget