UIElement:on_focus

Called when this element gains focus.

Usage

ui_element.on_focus = function(self, player_index)
  -- your code here
end

Arguments

Name	Type	Description
player_index	number	Number identifying the player focusing this element.

Examples

local buy_menu = crystal.VerticalList:new();

local sword = buy_menu:add_child(crystal.Image:new(crystal.assets.get("sword.png")));
sword:set_focusable(true);
sword.on_focus = function()
  print("Focused sword");
end

local shield = buy_menu:add_child(crystal.Image:new(crystal.assets.get("shield.png")));
shield:set_focusable(true);
shield.on_focus = function()
  print("Focused shield");
end

buy_menu:focus_tree(1); -- Prints "Focused sword"
buy_menu:action_pressed(1, "ui_down"); -- Prints "Focused shield"