LoveFrames/objects/internal/treenode.lua

--[[------------------------------------------------
	-- Love Frames - A GUI library for LOVE --
	-- Copyright (c) 2012-2014 Kenny Shields --
--]]------------------------------------------------

-- get the current require path
local path = string.sub(..., 1, string.len(...) - string.len(".objects.internal.treenode"))
local loveframes = require(path .. ".libraries.common")

-- button object
local newobject = loveframes.NewObject("treenode", "loveframes_object_treenode", true)

--[[---------------------------------------------------------
	- func: initialize()
	- desc: initializes the object
--]]---------------------------------------------------------
function newobject:initialize()
	
	self.type = "treenode"
	self.text = "Node"
	self.width = 250
	self.height = 16
	self.level = 0
	self.leftpadding = 0
	self.lastclick = 0
	self.open = false
	self.internal = true
	self.internals = {}
	self.icon = nil
	self.OnOpen = nil
	self.OnClose = nil
	
end

--[[---------------------------------------------------------
	- func: update(deltatime)
	- desc: updates the object
--]]---------------------------------------------------------
function newobject:update(dt)
	
	local state = loveframes.state
	local selfstate = self.state
	
	if state ~= selfstate then
		return
	end
	
	local visible = self.visible
	local alwaysupdate = self.alwaysupdate
	
	if not visible then
		if not alwaysupdate then
			return
		end
	end
	
	self:CheckHover()
	
	local parent = self.parent
	local base = loveframes.base
	local update = self.Update
	
	local tree = self.tree
	self:SetClickBounds(tree.x, tree.y, tree.width, tree.height)
	
	for k, v in ipairs(self.internals) do
		if v.type == "treenode" then
			if self.open then
				v.x = v.tree.x - v.tree.offsetx
				v.y = (v.tree.y + self.tree.itemheight) - v.tree.offsety
				if v.width > self.tree.itemwidth then
					self.tree.itemwidth = v.width
				end
				self.tree.itemheight = self.tree.itemheight + v.height
				v:update(dt)
			end
		else
			v:update(dt)
		end
	end
	
	if update then
		update(self, dt)
	end

end

--[[---------------------------------------------------------
	- func: draw()
	- desc: draws the object
--]]---------------------------------------------------------
function newobject:draw()
	
	local state = loveframes.state
	local selfstate = self.state
	
	if state ~= selfstate then
		return
	end
	
	local visible = self.visible
	
	if not visible then
		return
	end

	local skins = loveframes.skins.available
	local skinindex = loveframes.config["ACTIVESKIN"]
	local defaultskin = loveframes.config["DEFAULTSKIN"]
	local selfskin = self.skin
	local skin = skins[selfskin] or skins[skinindex]
	local drawfunc = skin.DrawTreeNode or skins[defaultskin].DrawTreeNode
	local draw = self.Draw
	local drawcount = loveframes.drawcount
	
	-- set the object's draw order
	self:SetDrawOrder()
		
	if draw then
		draw(self)
	else
		drawfunc(self)
	end
	
	for k, v in ipairs(self.internals) do
		if v.type == "treenode" then
			if self.open then
				v:draw()
			end
		else
			v:draw()
		end
	end
	
end

--[[---------------------------------------------------------
	- func: mousepressed(x, y, button)
	- desc: called when the player presses a mouse button
--]]---------------------------------------------------------
function newobject:mousepressed(x, y, button)

	local state = loveframes.state
	local selfstate = self.state
	
	if state ~= selfstate then
		return
	end
	
	local visible = self.visible
	
	if not visible then
		return
	end
	
	for k, v in ipairs(self.internals) do
		v:mousepressed(x, y, button)
	end
	
	if self.hover and button == 1 then
		local time = os.time()
		if self.lastclick + 0.40 > time then
			self.open = not self.open
		end
		self.lastclick = time
		local onselectnode = self.tree.OnSelectNode
		self.tree.selectednode = self
		if onselectnode then
			onselectnode(self.parent, self)
		end
	end
	
end

--[[---------------------------------------------------------
	- func: mousereleased(x, y, button)
	- desc: called when the player releases a mouse button
--]]---------------------------------------------------------
function newobject:mousereleased(x, y, button)
	
	local state = loveframes.state
	local selfstate = self.state
	
	if state ~= selfstate then
		return
	end
	
	local visible = self.visible
	
	if not visible then
		return
	end
	
	for k, v in ipairs(self.internals) do
		v:mousereleased(x, y, button)
	end

end

--[[---------------------------------------------------------
	- func: SetIcon(icon)
	- desc: sets the object's icon
--]]---------------------------------------------------------
function newobject:SetIcon(icon)

	if type(icon) == "string" then
		self.icon = love.graphics.newImage(icon)
	else
		self.icon = icon
	end
	
	return self

end

--[[---------------------------------------------------------
	- func: GetIcon()
	- desc: gets the object's icon
--]]---------------------------------------------------------
function newobject:GetIcon()

	return self.icon
	
end

--[[---------------------------------------------------------
	- func: SetText(text)
	- desc: sets the object's text
--]]---------------------------------------------------------
function newobject:SetText(text)

	self.text = text
	return self
	
end

--[[---------------------------------------------------------
	- func: GetText()
	- desc: gets the object's text
--]]---------------------------------------------------------
function newobject:GetText()

	return self.text
	
end

--[[---------------------------------------------------------
	- func: AddNode(text)
	- desc: adds a new node to the object
--]]---------------------------------------------------------
function newobject:AddNode(text)

	if not self.internals[1] then
		local openbutton = loveframes.objects["treenodebutton"]:new()
		openbutton.parent = self
		openbutton.staticx = 2
		openbutton.staticy = 2
		table.insert(self.internals, openbutton)
	end
	
	local node = loveframes.objects["treenode"]:new()
	node.parent = self
	node.tree = self.tree
	node.text = text
	node.level = self.level + 1
	table.insert(self.internals, node)
	return node
	
end

--[[---------------------------------------------------------
	- func: RemoveNode(id)
	- desc: removes a node from the object
--]]---------------------------------------------------------
function newobject:RemoveNode(id)
	
	id = id + 1
	for k, v in ipairs(self.internals) do
		if k == id then
			v:Remove()
			break
		end
	end
	
end

--[[---------------------------------------------------------
	- func: SetOpen(bool)
	- desc: sets whether or not the object is open
--]]---------------------------------------------------------
function newobject:SetOpen(bool)

	self.open = bool
	return self
	
end

--[[---------------------------------------------------------
	- func: GetOpen()
	- desc: gets whether or not the object is open
--]]---------------------------------------------------------
function newobject:GetOpen()

	return self.open
	
end