custom help files + redo System UI

sys/apps/system/settings.lua

@@ -0,0 +1,47 @@
+local UI = require('ui')
+
+local settings = _G.settings
+
+if settings then
+
+	local values = { }
+	for _,v in pairs(settings.getNames()) do
+		local value = settings.get(v)
+		if not value then
+			value = false
+		end
+		table.insert(values, {
+			name = v,
+			value = value,
+		})
+	end
+
+	local settingsTab = UI.Window {
+		tabTitle = 'Settings',
+		description = 'Computercraft configurable settings',
+		grid = UI.Grid {
+			y = 1,
+			values = values,
+			autospace = true,
+			sortColumn = 'name',
+			columns = {
+				{ heading = 'Setting',   key = 'name' },
+				{ heading = 'Value', key = 'value'  },
+			},
+		},
+	}
+
+	function settingsTab:eventHandler(event)
+		if event.type == 'grid_select' then
+			if not event.selected.value or type(event.selected.value) == 'boolean' then
+				event.selected.value = not event.selected.value
+			end
+			settings.set(event.selected.name, event.selected.value)
+			settings.save('.settings')
+			self.grid:draw()
+			return true
+		end
+	end
+
+	return settingsTab
+end