diff --git a/graphics/core.lua b/graphics/core.lua
index 2305990..3878288 100644
--- a/graphics/core.lua
+++ b/graphics/core.lua
@@ -111,4 +111,182 @@ function core.pipe(x1, y1, x2, y2, color, thin, align_tr)
     }
 end
 
+-- Interactive Field Manager
+
+---@param e graphics_base
+---@param max_len any
+---@param fg_bg any
+---@param dis_fg_bg any
+function core.new_ifield(e, max_len, fg_bg, dis_fg_bg)
+    local self = {
+        frame_start = 1,
+        visible_text = e.value,
+        cursor_pos = string.len(e.value) + 1,
+        selected_all = false
+    }
+
+    -- update visible text
+    local function _update_visible()
+        self.visible_text = string.sub(e.value, self.frame_start, self.frame_start + math.min(string.len(e.value), e.frame.w) - 1)
+    end
+
+    -- try shifting frame left
+    local function _try_lshift()
+        if self.frame_start > 1 then
+            self.frame_start = self.frame_start - 1
+            return true
+        end
+    end
+
+    -- try shifting frame right
+    local function _try_rshift()
+        if (self.frame_start + e.frame.w - 1) < string.len(e.value) then
+            self.frame_start = self.frame_start + 1
+            return true
+        end
+    end
+
+    ---@class ifield
+    local public = {}
+
+    -- show the field
+    function public.show()
+        _update_visible()
+
+        if e.enabled then
+            e.w_set_bkg(fg_bg.bkg)
+            e.w_set_fgd(fg_bg.fgd)
+        else
+            e.w_set_bkg(dis_fg_bg.bkg)
+            e.w_set_fgd(dis_fg_bg.fgd)
+        end
+
+        -- clear and print
+        e.w_set_cur(1, 1)
+        e.w_write(string.rep(" ", e.frame.w))
+        e.w_set_cur(1, 1)
+
+        if e.is_focused() and e.enabled then
+            -- write text with cursor
+            if self.selected_all then
+                e.w_set_bkg(fg_bg.fgd)
+                e.w_set_fgd(fg_bg.bkg)
+                e.w_write(self.visible_text)
+            elseif self.cursor_pos == (string.len(self.visible_text) + 1) then
+                -- write text with cursor at the end, no need to blit
+                e.w_write(self.visible_text)
+                e.w_set_fgd(colors.lightGray)
+                e.w_write("_")
+            else
+                local a, b = "", ""
+
+                if self.cursor_pos <= string.len(self.visible_text) then
+                    a = fg_bg.blit_bkg
+                    b = fg_bg.blit_fgd
+                end
+
+                local b_fgd = string.rep(fg_bg.blit_fgd, self.cursor_pos - 1) .. a .. string.rep(fg_bg.blit_fgd, string.len(self.visible_text) - self.cursor_pos)
+                local b_bkg = string.rep(fg_bg.blit_bkg, self.cursor_pos - 1) .. b .. string.rep(fg_bg.blit_bkg, string.len(self.visible_text) - self.cursor_pos)
+
+                e.w_blit(self.visible_text, b_fgd, b_bkg)
+            end
+        else
+            self.selected_all = false
+
+            -- write text without cursor
+            e.w_write(self.visible_text)
+        end
+    end
+
+    -- move cursor to x
+    ---@param x integer
+    function public.move_cursor(x)
+        self.selected_all = false
+        self.cursor_pos = math.min(x, string.len(self.visible_text) + 1)
+        public.show()
+    end
+
+    -- select all text
+    function public.select_all()
+        self.selected_all = true
+        public.show()
+    end
+
+    -- set field value
+    ---@param val string
+    function public.set_value(val)
+        e.value = string.sub(val, 1, math.min(max_len, string.len(val)))
+
+        self.selected_all = false
+        self.frame_start = 1 + math.max(0, string.len(val) - e.frame.w)
+
+        _update_visible()
+        self.cursor_pos = string.len(self.visible_text) + 1
+
+        public.show()
+    end
+
+    -- try to insert a character if there is space
+    ---@param char string
+    function public.try_insert_char(char)
+        -- limit length
+        if string.len(e.value) >= max_len then return end
+
+        -- replace if selected all, insert otherwise
+        if self.selected_all then
+            self.selected_all = false
+            self.cursor_pos = 2
+            self.frame_start = 1
+
+            e.value = char
+            public.show()
+        else
+            e.value = string.sub(e.value, 1, self.frame_start + self.cursor_pos - 2) .. char .. string.sub(e.value, self.frame_start + self.cursor_pos - 1, string.len(e.value))
+            _update_visible()
+
+            if self.cursor_pos <= string.len(self.visible_text) then
+                self.cursor_pos = self.cursor_pos + 1
+                public.show()
+            elseif _try_rshift() then public.show() end
+        end
+    end
+
+    -- remove charcter before cursor if there is anything to remove, or delete all if selected all
+    function public.backspace()
+        if self.selected_all then
+            self.selected_all = false
+            e.value = ""
+            self.cursor_pos = 1
+            self.frame_start = 1
+            public.show()
+        else
+            if self.frame_start + self.cursor_pos > 2 then
+                e.value = string.sub(e.value, 1, self.frame_start + self.cursor_pos - 3) .. string.sub(e.value, self.frame_start + self.cursor_pos - 1, string.len(e.value))
+                if self.cursor_pos > 1 then
+                    self.cursor_pos = self.cursor_pos - 1
+                    public.show()
+                elseif _try_lshift() then public.show() end
+            end
+        end
+    end
+
+    -- move cursor left by one
+    function public.nav_left()
+        if self.cursor_pos > 1 then
+            self.cursor_pos = self.cursor_pos - 1
+            public.show()
+        elseif _try_lshift() then public.show() end
+    end
+
+    -- move cursor right by one
+    function public.nav_right()
+        if self.cursor_pos <= string.len(self.visible_text) then
+            self.cursor_pos = self.cursor_pos + 1
+            public.show()
+        elseif _try_rshift() then public.show() end
+    end
+
+    return public
+end
+
 return core
diff --git a/graphics/elements/form/number_field.lua b/graphics/elements/form/number_field.lua
index e0e2426..ee75224 100644
--- a/graphics/elements/form/number_field.lua
+++ b/graphics/elements/form/number_field.lua
@@ -1,11 +1,10 @@
 -- Numeric Value Entry Graphics Element
 
-local util    = require("scada-common.util")
-
 local core    = require("graphics.core")
 local element = require("graphics.element")
 
 local KEY_CLICK = core.events.KEY_CLICK
+local MOUSE_CLICK = core.events.MOUSE_CLICK
 
 ---@class number_field_args
 ---@field default? number default value, defaults to 0
@@ -38,7 +37,11 @@ local function number_field(args)
     args.max_digits = args.max_digits or e.frame.w
 
     -- set initial value
-    e.value = util.strval(args.default or 0)
+    e.value = "" .. (args.default or 0)
+
+    -- make an interactive field manager
+    local ifield = core.new_ifield(e, args.max_digits, args.fg_bg, args.dis_fg_bg)
+
 
     -- draw input
     local function show()
@@ -67,8 +70,16 @@ local function number_field(args)
     ---@param event mouse_interaction mouse event
     function e.handle_mouse(event)
         -- only handle if on an increment or decrement arrow
-        if e.enabled and core.events.was_clicked(event.type) then
-            e.req_focus()
+        if e.enabled then
+            if core.events.was_clicked(event.type) then
+                e.req_focus()
+
+                if event.type == MOUSE_CLICK.UP then
+                    ifield.move_cursor(event.current.x)
+                end
+            elseif event.type == MOUSE_CLICK.DOUBLE_CLICK then
+                ifield.select_all()
+            end
         end
     end
 
@@ -77,44 +88,52 @@ local function number_field(args)
     function e.handle_key(event)
         if event.type == KEY_CLICK.CHAR and string.len(e.value) < args.max_digits then
             if tonumber(event.name) then
-                e.value = util.trinary(e.value == "0", "", e.value) .. tonumber(event.name)
-                show()
+                if e.value == 0 then e.value = "" end
+                ifield.try_insert_char(event.name)
             end
         elseif event.type == KEY_CLICK.DOWN then
             if (event.key == keys.backspace or event.key == keys.delete) and (string.len(e.value) > 0) then
-                e.value = string.sub(e.value, 1, string.len(e.value) - 1)
+                ifield.backspace()
                 has_decimal = string.find(e.value, "%.") ~= nil
-                show()
             elseif (event.key == keys.period or event.key == keys.numPadDecimal) and (not has_decimal) and args.allow_decimal then
-                e.value = e.value .. "."
                 has_decimal = true
-                show()
+                ifield.try_insert_char(".")
             elseif (event.key == keys.minus or event.key == keys.numPadSubtract) and (string.len(e.value) == 0) and args.allow_negative then
-                e.value = "-"
-                show()
+                ifield.set_value("-")
+            elseif event.key == keys.left then
+                ifield.nav_left()
+            elseif event.key == keys.right then
+                ifield.nav_right()
+            elseif event.key == keys.a and event.ctrl then
+                ifield.select_all()
             end
         end
     end
 
-    -- set the value
+    -- set the value (must be a number)
     ---@param val number number to show
     function e.set_value(val)
-        e.value = val
-        show()
+        if tonumber(val) then
+            ifield.set_value("" .. tonumber(val))
+        end
     end
 
     -- set minimum input value
     ---@param min integer minimum allowed value
-    function e.set_min(min)
-        args.min = min
-        show()
-    end
+    function e.set_min(min) args.min = min end
 
     -- set maximum input value
     ---@param max integer maximum allowed value
-    function e.set_max(max)
-        args.max = max
-        show()
+    function e.set_max(max) args.max = max end
+
+    -- replace text with pasted text if its a number
+    ---@param text string string pasted
+    function e.handle_paste(text)
+        if tonumber(text) then
+            ifield.set_value("" .. tonumber(text))
+        else
+            ifield.set_value("0")
+        end
     end
 
     -- handle focused
@@ -136,15 +155,15 @@ local function number_field(args)
             e.value = ""
         end
 
-        show()
+        ifield.show()
     end
 
     -- on enable/disable
-    e.enable = show
-    e.disable = show
+    e.enable = ifield.show
+    e.disable = ifield.show
 
     -- initial draw
-    show()
+    ifield.show()
 
     return e.complete()
 end
diff --git a/graphics/elements/form/text_field.lua b/graphics/elements/form/text_field.lua
index 908d3fc..37a91d3 100644
--- a/graphics/elements/form/text_field.lua
+++ b/graphics/elements/form/text_field.lua
@@ -1,8 +1,5 @@
 -- Text Value Entry Graphics Element
 
-local util    = require("scada-common.util")
-local events  = require("graphics.events")
-
 local core    = require("graphics.core")
 local element = require("graphics.element")
 
@@ -34,71 +31,8 @@ local function text_field(args)
     -- set initial value
     e.value = args.value or ""
 
-    local max_len = args.max_len or e.frame.w
-    local frame_start = 1
-    local visible_text = e.value
-    local cursor_pos = string.len(visible_text) + 1
-
-    local function frame__update_visible()
-        visible_text = string.sub(e.value, frame_start, frame_start + math.min(string.len(e.value), e.frame.w) - 1)
-    end
-
-    -- draw input
-    local function show()
-        frame__update_visible()
-
-        if e.enabled then
-            e.w_set_bkg(args.fg_bg.bkg)
-            e.w_set_fgd(args.fg_bg.fgd)
-        else
-            e.w_set_bkg(args.dis_fg_bg.bkg)
-            e.w_set_fgd(args.dis_fg_bg.fgd)
-        end
-
-        -- clear and print
-        e.w_set_cur(1, 1)
-        e.w_write(string.rep(" ", e.frame.w))
-        e.w_set_cur(1, 1)
-
-        if e.is_focused() and e.enabled then
-            -- write text with cursor
-            if cursor_pos == (string.len(visible_text) + 1) then
-                -- write text with cursor at the end, no need to blit
-                e.w_write(visible_text)
-                e.w_set_fgd(colors.lightGray)
-                e.w_write("_")
-            else
-                local a, b = "", ""
-
-                if cursor_pos <= string.len(visible_text) then
-                    a = args.fg_bg.blit_bkg
-                    b = args.fg_bg.blit_fgd
-                end
-
-                local b_fgd = string.rep(args.fg_bg.blit_fgd, cursor_pos - 1) .. a .. string.rep(args.fg_bg.blit_fgd, string.len(visible_text) - cursor_pos)
-                local b_bkg = string.rep(args.fg_bg.blit_bkg, cursor_pos - 1) .. b .. string.rep(args.fg_bg.blit_bkg, string.len(visible_text) - cursor_pos)
-
-                e.w_blit(visible_text, b_fgd, b_bkg)
-            end
-        else
-            -- write text without cursor
-            e.w_write(visible_text)
-        end
-    end
-
-    local function frame__try_lshift()
-        if frame_start > 1 then
-            frame_start = frame_start - 1
-            return true
-        end
-    end
-
-    local function frame__try_rshift()
-        if (frame_start + e.frame.w - 1) < string.len(e.value) then
-            frame_start = frame_start + 1
-            return true
-        end
-    end
+    -- make an interactive field manager
+    local ifield = core.new_ifield(e, args.max_len or e.frame.w, args.fg_bg, args.dis_fg_bg)
 
     -- handle mouse interaction
     ---@param event mouse_interaction mouse event
@@ -109,9 +43,10 @@ local function text_field(args)
                 e.req_focus()
 
                 if event.type == MOUSE_CLICK.UP then
-                    cursor_pos = math.min(event.current.x, string.len(visible_text) + 1)
-                    show()
+                    ifield.move_cursor(event.current.x)
                 end
+            elseif event.type == MOUSE_CLICK.DOUBLE_CLICK then
+                ifield.select_all()
             end
         end
     end
@@ -119,61 +54,43 @@ local function text_field(args)
     -- handle keyboard interaction
     ---@param event key_interaction key event
     function e.handle_key(event)
-        if event.type == KEY_CLICK.CHAR and string.len(e.value) < max_len then
-            e.value = string.sub(e.value, 1, frame_start + cursor_pos - 2) .. event.name .. string.sub(e.value, frame_start + cursor_pos - 1, string.len(e.value))
-            frame__update_visible()
-            if cursor_pos <= string.len(visible_text) then
-                cursor_pos = cursor_pos + 1
-                show()
-            elseif frame__try_rshift() then show() end
+        if event.type == KEY_CLICK.CHAR then
+            ifield.try_insert_char(event.name)
         elseif event.type == KEY_CLICK.DOWN or event.type == KEY_CLICK.HELD then
             if (event.key == keys.backspace or event.key == keys.delete) then
-                -- remove charcter at cursor if there is anything to remove
-                if frame_start + cursor_pos > 2 then
-                    e.value = string.sub(e.value, 1, frame_start + cursor_pos - 3) .. string.sub(e.value, frame_start + cursor_pos - 1, string.len(e.value))
-                    if cursor_pos > 1 then
-                        cursor_pos = cursor_pos - 1
-                        show()
-                    elseif frame__try_lshift() then show() end
-                end
+                ifield.backspace()
             elseif event.key == keys.left then
-                if cursor_pos > 1 then
-                    cursor_pos = cursor_pos - 1
-                    show()
-                elseif frame__try_lshift() then show() end
+                ifield.nav_left()
             elseif event.key == keys.right then
-                if cursor_pos <= string.len(visible_text) then
-                    cursor_pos = cursor_pos + 1
-                    show()
-                elseif frame__try_rshift() then show() end
+                ifield.nav_right()
+            elseif event.key == keys.a and event.ctrl then
+                ifield.select_all()
             end
         end
     end
 
     -- set the value
-    ---@param val string string to show
+    ---@param val string string to set
     function e.set_value(val)
-        e.value = string.sub(val, 1, math.min(max_len, string.len(val)))
-        frame_start = 1 + math.max(0, string.len(val) - e.frame.w)
-        frame__update_visible()
-        cursor_pos = string.len(visible_text) + 1
-        show()
+        ifield.set_value(val)
     end
 
+    -- replace text with pasted text
+    ---@param text string string to set
     function e.handle_paste(text)
-        e.set_value(text)
+        ifield.set_value(text)
     end
 
     -- handle focus
-    e.on_focused = show
-    e.on_unfocused = show
+    e.on_focused = ifield.show
+    e.on_unfocused = ifield.show
 
     -- on enable/disable
-    e.enable = show
-    e.disable = show
+    e.enable = ifield.show
+    e.disable = ifield.show
 
     -- initial draw
-    show()
+    ifield.show()
 
     return e.complete()
 end