85 lines
2.1 KiB
Lua
85 lines
2.1 KiB
Lua
local Prop = require("gfx.prop")
|
|
local Children = Prop:new{ defaultState = {} }
|
|
|
|
function Children:with(elementType)
|
|
local propSelf = self
|
|
function elementType:_iterateChildren(opts)
|
|
local func, tbl, start = ipairs(propSelf:getState(self))
|
|
return function(t, i)
|
|
if i == opts.to then
|
|
return nil, nil
|
|
end
|
|
return func(t, i)
|
|
end, tbl, (opts and opts.from) or start
|
|
end
|
|
|
|
function elementType:childCount()
|
|
return #propSelf:getState(self)
|
|
end
|
|
|
|
function elementType:_childAt(index)
|
|
return propSelf:getState()[elementType:_validChildIndex(index)]
|
|
end
|
|
|
|
function elementType:_validChildIndex(from)
|
|
return math.max(1, math.min((from or self:childCount()) + 1, self:childCount() + 1))
|
|
end
|
|
|
|
function elementType:_triggerChildChanged(index)
|
|
if type(self.onChildrenChanged) == "function" then
|
|
self:onChildrenChanged(index)
|
|
end
|
|
self:_reload()
|
|
end
|
|
|
|
function elementType:_addChild(child, index)
|
|
index = self:_validChildIndex(index)
|
|
table.insert(propSelf:getState(self), index, child)
|
|
self:_triggerChildChanged(index)
|
|
end
|
|
|
|
function elementType:_removeChild(locator)
|
|
local index = nil
|
|
local locatorType = type(locator)
|
|
if locatorType == "table" then
|
|
for i,v in self:_iterateChildren() do
|
|
if v == locator then
|
|
index = i
|
|
break
|
|
end
|
|
end
|
|
elseif locatorType == "string" then
|
|
for i,v in self:_iterateChildren() do
|
|
if v:getId() == locator then
|
|
index = i
|
|
break
|
|
end
|
|
end
|
|
else--if locatorType == "number" then
|
|
index = self:_validChildIndex(locator)
|
|
end
|
|
|
|
-- Child not found
|
|
if index == nil then
|
|
return false, nil
|
|
end
|
|
|
|
local result = table.remove(propSelf:getState(self), index)
|
|
self:_triggerChildChanged(index)
|
|
return true, result
|
|
end
|
|
|
|
function elementType:findChildById(id)
|
|
for _,child in self:_iterateChildren() do
|
|
local result = child:findById(id)
|
|
if result then
|
|
return result
|
|
end
|
|
end
|
|
return nil
|
|
end
|
|
|
|
return elementType
|
|
end
|
|
|
|
return Children |