#62, #72 work on main layout, not using layout class, refactoring and bugfixes

graphics/layout.lua

@@ -1,75 +0,0 @@
---
--- Graphics View Layout
---
-
-local core = require("graphics.core")
-local util = require("scada-common.util")
-
-local displaybox = require("graphics.elements.displaybox")
-
-local layout = {}
-
----@class stem
----@field element graphics_element
----@field children table
-
-function layout.create(window, default_fg_bg)
-    local self = {
-        root = displaybox{window=window,fg_bg=default_fg_bg},
-        tree = {}
-    }
-
-    -- recursive function to search layout tree for an element
-    ---@param id string element ID to look for
-    ---@param tree table tree to search in
-    ---@return stem|nil
-    local function lookup(id, tree)
-        for key, stem in pairs(tree) do
-            if key == id then
-                return stem
-            else
-                stem = lookup(id, stem.children)
-                if stem ~= nil then return stem end
-            end
-        end
-
-        return nil
-    end
-
-    ---@class layout
-    local public = {}
-
-    -- insert a new element
-    ---@param parent_id string|nil parent or nil for root
-    ---@param id string element ID
-    ---@param element graphics_element
-    function public.insert_at(parent_id, id, element)
-        if parent_id == nil then
-            self.tree[id] = { element = element, children = {} }
-        else
-            local parent = lookup(parent_id, self.tree)
-            if parent ~= nil then
-                parent.children[id] = { element = element, children = {} }
-            end
-        end
-    end
-
-    -- get an element by ID
-    ---@param id string element ID
-    ---@return graphics_element|nil
-    function public.get_element_by_id(id)
-        local elem = lookup(id, self.tree)
----@diagnostic disable-next-line: need-check-nil
-        return util.trinary(elem == nil, nil, elem.element)
-    end
-
-    -- get the root element
-    ---@return graphics_element
-    function public.get_root()
-        return self.root
-    end
-
-    return public
-end
-
-return layout