Client specific GUI update POC

control.lua

local mod_gui = require("mod-gui")
local current_player_index
local name_element
local tick_element

script.on_init(function()
    current_player_index = 0
end)

script.on_event(defines.events.on_player_joined_game, function(event)
    local flow = mod_gui.get_frame_flow(game.players[event.player_index])

    if flow["info-frame"] then
        if current_player_index == nil then
            print("==== player index " .. event.player_index)
            current_player_index = event.player_index
            name_element = flow["info-frame"]["info-name"]
            tick_element = flow["info-frame"]["info-tick"]
        end

    else
        local frame = flow.add{
            type = "frame",
            name = "info-frame",
            direction = "vertical",
        }

        local name = frame.add{type="label", name="info-name", caption="(none)"}
        local tick = frame.add{type="label", name="info-tick"}

        if current_player_index == nil then
            print("==== player index " .. event.player_index)
            current_player_index = event.player_index
            name_element = name
            tick_element = tick
        end
    end
end)

script.on_nth_tick(1, function()
    if name_element then
        tick_element.caption = tostring(game.tick)
    end
end)

script.on_event(defines.events.on_selected_entity_changed, function(event)
    if
        current_player_index ~= event.player_index
    then
        return
    end

    local player = game.players[event.player_index]
    local entity = player.selected
    if entity then
        name_element.caption = player.selected.name
    else
        name_element.caption = "(none)"
    end
end)