wesnoth/data/modifications/pick_advance/dialog.lua

-- << pickadvance_dialog

pickadvance = {}
local T = wesnoth.require("lua/helper.lua").set_wml_tag_metatable {}
local _ = wesnoth.textdomain "wesnoth"

function pickadvance.show_dialog_unsynchronized(advance_info, unit)
-- dialog exit codes --
	local reset_code = -3
	local single_unit_code = -1
--
	local unit_type_options = advance_info.type_advances
	local options = {}
	for _, ut in ipairs(unit_type_options) do
		options[#options + 1] = wesnoth.unit_types[ut]
	end

	local unit_override_one = (advance_info.unit_override or {})[2] == nil
		and (advance_info.unit_override or {})[1] or nil
	local game_override_one = (advance_info.game_override or {})[2] == nil
		and (advance_info.game_override or {})[1] or nil

	local description_row = T.row {
		T.column {
			border = "all",
			border_size = 5,
			horizontal_alignment = "left",
			T.label {
				definition = "title",
				label = _ "Plan Advance"
			}
		},
	}

	local list_row_definition = T.grid {
		T.row {
			T.column {
				border = "all",
				border_size = 5,
				grow_factor = 0,
				horizontal_alignment = "left",
				T.image {
					id = "the_icon",
					linked_group = "image"
				}
			},
			T.column {
				border = "all",
				border_size = 5,
				grow_factor = 1,
				horizontal_alignment = "left",
				T.label {
					use_markup = true,
					id = "the_label",
					linked_group = "type"
				}
			}
		}
	}

	local listbox = T.listbox {
		id = "the_list",
		has_minimum = true,
		T.list_definition {
			T.row {
				T.column {
					horizontal_grow = true,
					vertical_grow = true,
					T.toggle_panel {
						return_value = single_unit_code,
						list_row_definition
					}
				}
			}
		}
	}

-- main dialog definition
	local dialog = {
		T.tooltip {
			id = "tooltip_large"
		},
		T.helptip {
			id = "tooltip_large"
		},
		T.linked_group {
			id = "image",
			fixed_width = true
		},
		T.linked_group {
			id = "type",
			fixed_width = true
		},
		T.grid {
			description_row,
			T.row {
				grow_factor = 1,
				T.column {
					border = "all",
					border_size = 5,
					horizontal_grow = true,
					listbox
				}
			},
			T.row {
				grow_factor = 0,
				T.column {
					border = "all",
					border_size = 5,
					horizontal_alignment = "left",
					T.toggle_button {
						id = "apply_to_all",
						label = _ "Apply to all units of this type"
					}
				}
			},
			T.row {
				T.column {
					horizontal_grow = true,
					T.grid {
						T.row {
							grow_factor = 0,
							T.column {
								border = "all",
								border_size = 5,
								horizontal_alignment = "left",
								T.button {
									return_value = reset_code,
									id = "reset",
									label = _ "Reset",
									tooltip = _ "Reset advancements to default"
								}
							},
							T.column {
								border = "all",
								border_size = 5,
								horizontal_alignment = "right",
								T.button {
									return_value = single_unit_code,
									label = _ "Save"
								}
							}
						}
					}
				}
			}
		}
	}

-- dialog preshow function
	local function preshow()
		wesnoth.set_dialog_active(not not (unit_override_one or game_override_one), "reset")
		wesnoth.set_dialog_visible(not unit.canrecruit, "apply_to_all")

		for i, advance_type in ipairs(options) do
			local text = advance_type.name
			if advance_type.id == game_override_one then
				text = text .. _" (chosen, all)"
			elseif advance_type.id == unit_override_one then
				text = text .. _" (chosen)"
			end
			wesnoth.set_dialog_value(text, "the_list", i, "the_label")
			local img = advance_type.__cfg.image
			wesnoth.set_dialog_value(img or "misc/blank-hex.png", "the_list", i, "the_icon")
		end

		wesnoth.set_dialog_focus("the_list")

		local function select()
			local i = wesnoth.get_dialog_value "the_list"
			if i > 0 then
				local img = options[i].__cfg.image
				wesnoth.set_dialog_value(img or "misc/blank-hex.png", "the_list", i, "the_icon")
			end
		end
		wesnoth.set_dialog_callback(select, "the_list")
	end

-- dialog postshow function
	local item_result
	local apply_to_all
	local function postshow()
		item_result = wesnoth.get_dialog_value("the_list")
		apply_to_all = wesnoth.get_dialog_value("apply_to_all")
	end

	local dialog_exit_code = wesnoth.show_dialog(dialog, preshow, postshow)

-- determine the choice made
	local is_reset = dialog_exit_code == reset_code
	local is_ok = dialog_exit_code >= single_unit_code and item_result >= 1
	return {
		is_unit_override = is_reset or is_ok,
		unit_override = is_ok and options[item_result].id or is_reset and table.concat(unit_type_options, ","),

		is_game_override = is_reset or apply_to_all,
		game_override = apply_to_all and options[item_result].id or nil,
	}
end

-- >>