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koreader/frontend/ui/event.lua

41 lines
858 B
Lua

--[[--
Events are messages that are passed through the widget tree.
Events need a "name" attribute as minimal data.
To see how event propagation works and how to make
widgets event-aware see the implementation in @{ui.widget.container.widgetcontainer}.
A detailed guide to events can be found in @{Events.md|the event programmer's guide}.
]]
--[[--
@field handler name for the handler method: `"on"..Event.name`
@field args array of arguments for the event
@table Event
]]
local Event = {}
--[[--
Creates a new event.
@string name
@tparam[opt] ... arguments for the event
@treturn Event
@usage
local Event = require("ui/event")
Event:new("GotoPage", 1)
]]
function Event:new(name, ...)
local o = {
handler = "on"..name,
args = table.pack(...),
}
setmetatable(o, self)
self.__index = self
return o
end
return Event