Add ability to hide elements using get/setVisible

docs/API.md

@@ -60,6 +60,8 @@
 * element:getSize() - get the size
 * element:setBackground(image) - Set the background of element. Please note a size needs to be defined on element
 * element:getBackground() - get the current background
+* element:setVisible(bool) - set the visibility status (set hidden=>false, unhide=>true or nil)
+* element:getVisible() - get the visibility status
 
 ###Button
 * element:setText( text ) - set the caption of the button

docs/example.lua

@@ -10,7 +10,15 @@ local s = smartfs.create("smartfs:form", function(state)
 	usr:setBackground("halo.png")
 	state:field(7.25,1.25,3,1,"txt","Textbox")
 	state:image(0,0,2,2,"img","default_stone.png")
-	state:toggle(0,2,3,1,"tg",{"plenty..","of..","custom..","elements"})
+	local toggle = state:toggle(0,2,3,1,"tg",{"plenty..","of..","custom..","elements"})
+	toggle:onToggle(function(self, state, player)
+		if state:get("ta"):getVisible() == false then
+			state:get("ta"):setVisible()
+		else
+			state:get("ta"):setVisible(false)
+		end
+	end)
+
 	state:checkbox(2,1,"c","Easy code",true)
 	local area = state:textarea(1,3.5,9,4,"ta","Code:")
 	local res = [[

smartfs.lua

@@ -304,7 +304,9 @@ function smartfs._makeState_(form, newplayer, params, is_inv, nodepos)
 				res = "size["..self._size.w..","..self._size.h.."]"
 			end
 			for key,val in pairs(self._ele) do
-				res = res .. val:getBackgroundString() .. val:build()
+				if val:getVisible() then
+					res = res .. val:getBackgroundString() .. val:build()
+				end
 			end
 			return res
 		end,
@@ -432,6 +434,16 @@ function smartfs._makeState_(form, newplayer, params, is_inv, nodepos)
 				getSize = function(self)
 					return self.data.size
 				end,
+				setVisible = function(self, visible)
+					if visible == nil then
+						self.data.visible = true
+					else
+						self.data.visible = visible
+					end
+				end,
+				getVisible = function(self)
+					return self.data.visible
+				end,
 				setBackground = function(self, image)
 					self.data.background = image
 				end,
@@ -455,6 +467,8 @@ function smartfs._makeState_(form, newplayer, params, is_inv, nodepos)
 				end,
 			}
 
+			ele.data.visible = true --visible by default
+
 			for key, val in pairs(type) do
 				ele[key] = val
 			end