some improvements

ram-widget/ram-widget.lua

@@ -34,6 +34,7 @@ local w = wibox {
 }
 
 w:setup {
+    {
         border_width = 0,
         colors = {
             '#74aeab',
@@ -46,21 +47,31 @@ w:setup {
         forced_width = 25,
         id = 'pie',
         widget = wibox.widget.piechart
+    },
+    {
+        text = 'Hello',
+        widget = wibox.widget.textbox
+    },
+    id = 'popup',
+    layout = wibox.layout.stack
 }
 
+local function getPercentage(value)
+    return math.floor(value / total * 100 + 0.5) .. '%'
+end
+
 ramgraph_widget:buttons(
     awful.util.table.join(
         awful.button({}, 1, function()
             awful.placement.top_right(w, { margins = {top = 25, right = 10}})
-            w.pie.data_list = {
-                {'used' , used},
-                {'free' , free},
-                {'shared' , shared},
-                {'buff_cache' , buff_cache},
-                {'available' , available
+            w.popup.pie.data_list = {
+                {'used ' .. getPercentage(used), used},
+                {'free ' .. getPercentage(free), free},
+--                {'shared ' .. getPercentage(shared), shared},
+                {'buff_cache ' .. getPercentage(buff_cache), buff_cache},
+--                {'available ' .. getPercentage(available), available}
             }
-            }
-            w.pie.display_labels = true
+            w.popup.pie.display_labels = true
             w.visible = true
         end),
         awful.button({}, 3, function()