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comparison util/events.lua @ 1175:edef0c10e076

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util.events: handler priorities
author Waqas Hussain <waqas20@gmail.com>
date Sat, 16 May 2009 15:56:45 +0500
parents 542d49518d3a
children 8c5d945c1f35
comparison
equal deleted inserted replaced
1174:f7b6d5839092 1175:edef0c10e076
1 1
2 local ipairs = ipairs; 2 local ipairs = ipairs;
3 local pairs = pairs; 3 local pairs = pairs;
4 local t_insert = table.insert; 4 local t_insert = table.insert;
5 local t_sort = table.sort;
5 local select = select; 6 local select = select;
6 7
7 module "events" 8 module "events"
8 9
9 function new() 10 function new()
17 for i=#index,1,-1 do index[i] = nil; end 18 for i=#index,1,-1 do index[i] = nil; end
18 else index = {}; handlers[event] = index; end 19 else index = {}; handlers[event] = index; end
19 for handler in pairs(_handlers) do 20 for handler in pairs(_handlers) do
20 t_insert(index, handler); 21 t_insert(index, handler);
21 end 22 end
23 t_sort(index, function(a, b) return _handlers[a] > _handlers[b]; end);
22 end 24 end
23 end; 25 end;
24 local function add_handler(event, handler) 26 local function add_handler(event, handler, priority)
25 local map = event_map[event]; 27 local map = event_map[event];
26 if map then 28 if map then
27 map[handler] = true; 29 map[handler] = priority or 0;
28 else 30 else
29 map = {[handler] = true}; 31 map = {[handler] = priority or 0};
30 event_map[event] = map; 32 event_map[event] = map;
31 end 33 end
32 _rebuild_index(); 34 _rebuild_index();
33 end; 35 end;
34 local function remove_handler(event, handler) 36 local function remove_handler(event, handler)