Execute custom command on entering/exiting waybar area

[cmihail]

Hello. I have the following setup with 2 overlay waybar bars:

// -*- mode: jsonc -*-
[{
    "name": "minimal_bar",
    "include": "~/.config/waybar/modules.jsonc",
    "layer": "top",
    "mode": "top",
    "exclusive": false,
    "passthrough": false,
    "height": 30,
    "width": 10, // Force minimum width
    "spacing": 2, // Gaps between modules
    "reload_style_on_change": true,
    "modules-center": [
        "clock",
        "custom/notifications",
        "battery"
    ]
}, {
    "name": "full_bar",
    "include": "~/.config/waybar/modules.jsonc",
    "layer": "top",
    "mode": "top",
    "exclusive": false,
    "passthrough": false,
    "height": 30, // Waybar height (to be removed for auto height)
    "width": 750, // Waybar width
    "spacing": 2, // Gaps between modules
    "reload_style_on_change": true,
    "start_hidden": true,
    "modules-left": [
        "hyprland/workspaces"
    ],
    "modules-center": [
        "clock",
        "custom/notifications",
        "battery"
    ],
    "modules-right": [
        "tray",
        "pulseaudio#microphone",
        "pulseaudio",
        "backlight",
        "power-profiles-daemon",
        "custom/power"
    ]
}]

The full bar starts hidden and it is displayed when clicking on the clock in minimal bar or via a keyboard binding by executing killall -SIGUSR1 waybar.

While this works, I would prefer to not have to click on clock for this action and have the full bar displayed when I enter with the mouse in the minimal bar area, and have the full bar hidden when I exit the full bar area.

From what I see these events are already handled at https://github.com/Alexays/Waybar/blob/master/src/AModule.cpp#L125 in order to change the cursor type, so adding custom actions shouldn't be too hard, maybe with a config in the bar like:

{
  "name": <bar_name>,
  .......
  "on-mouse-enter": <custom_action>,
  "on-mouse-exit": <custom_action>
}

Does this sound good? I'd be willing to implement this myself if it is fine.