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42 lines
1.1 KiB
Lua
42 lines
1.1 KiB
Lua
--[[--
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The EventListener is an interface that handles events. This is the base class
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for @{ui.widget.widget|Widget}
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EventListeners have a rudimentary event handler/dispatcher that
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will call a method "onEventName" for an event with name
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"EventName"
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]]
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local EventListener = {}
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function EventListener:extend(subclass_prototype)
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local o = subclass_prototype or {}
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setmetatable(o, self)
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self.__index = self
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return o
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end
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function EventListener:new(o)
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o = self:extend(o)
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if o.init then o:init() end
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return o
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end
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--[[--
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Invoke handler method for an event.
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Handler method name is determined by @{ui.event.Event}'s handler field.
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By default, it's `"on"..Event.name`.
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@tparam ui.event.Event event
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@treturn bool return true if event is consumed successfully.
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]]
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function EventListener:handleEvent(event)
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if self[event.handler] then
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--print("EventListener:handleEvent:", event.handler, "handled by", debug.getinfo(self[event.handler], "S").short_src, self)
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return self[event.handler](self, unpack(event.args))
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end
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end
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return EventListener
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