allow right alignment for numeric inputs

graphics/core.lua

@@ -123,15 +123,17 @@ 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)
+---@param e graphics_base element
+---@param max_len any max value length
+---@param fg_bg any enabled fg/bg
+---@param dis_fg_bg any disabled fg/bg
+---@param align_right any true to align content right while unfocused
+function core.new_ifield(e, max_len, fg_bg, dis_fg_bg, align_right)
     local self = {
         frame_start = 1,
         visible_text = e.value,
         cursor_pos = string.len(e.value) + 1,
+        align_offset = 0,
         selected_all = false
     }
 
@@ -186,7 +188,12 @@ function core.new_ifield(e, max_len, fg_bg, dis_fg_bg)
         e.w_write(string.rep(" ", e.frame.w))
         e.w_set_cur(1, 1)
 
-        local function _write()
+        local function _write(align_r)
+            if align_r and string.len(self.visible_text) <=e.frame.w then
+                self.align_offset = (e.frame.w - string.len(self.visible_text))
+                e.w_set_cur((e.frame.w - string.len(self.visible_text)) + 1, 1)
+            end
+
             if self.censor then
                 e.w_write(string.rep(self.censor, string.len(self.visible_text)))
             else
@@ -226,15 +233,27 @@ function core.new_ifield(e, max_len, fg_bg, dis_fg_bg)
             self.selected_all = false
 
             -- write text without cursor
-            _write()
+            _write(align_right)
         end
     end
 
-    -- move cursor to x
+    -- get an x value to pass to move_cursor taking into account right alignment offset present when unfocused
     ---@param x integer
+    function public.get_cursor_align_shift(x)
+        return math.max(0, x - self.align_offset)
+    end
+
+    -- move cursor to x
+    ---@param x integer x position or 0 to jump to the end
     function public.move_cursor(x)
         self.selected_all = false
-        self.cursor_pos = math.min(x, string.len(self.visible_text) + 1)
+
+        if x <= 0 then
+            self.cursor_pos = string.len(self.visible_text) + 1
+        else
+            self.cursor_pos = math.min(x, string.len(self.visible_text) + 1)
+        end
+
         public.show()
     end
 

graphics/elements/form/number_field.lua

@@ -17,6 +17,7 @@ local MOUSE_CLICK = core.events.MOUSE_CLICK
 ---@field max_frac_digits? integer maximum number of fractional digits, enforced on unfocus
 ---@field allow_decimal? boolean true to allow decimals
 ---@field allow_negative? boolean true to allow negative numbers
+---@field align_right? boolean true to align right while unfocused
 ---@field dis_fg_bg? cpair foreground/background colors when disabled
 ---@field parent graphics_element
 ---@field id? string element id
@@ -47,7 +48,7 @@ local function number_field(args)
     e.value = "" .. (args.default or 0)
 
     -- make an interactive field manager
-    local ifield = core.new_ifield(e, args.max_chars, args.fg_bg, args.dis_fg_bg)
+    local ifield = core.new_ifield(e, args.max_chars, args.fg_bg, args.dis_fg_bg, args.align_right)
 
     -- handle mouse interaction
     ---@param event mouse_interaction mouse event
@@ -55,10 +56,16 @@ local function number_field(args)
         -- only handle if on an increment or decrement arrow
         if e.enabled and e.in_frame_bounds(event.current.x, event.current.y) then
             if core.events.was_clicked(event.type) then
+                local x = event.current.x
+
+                if not e.is_focused() then
+                    x = ifield.get_cursor_align_shift(x)
+                end
+
                 e.take_focus()
 
                 if event.type == MOUSE_CLICK.UP then
-                    ifield.move_cursor(event.current.x)
+                    ifield.move_cursor(x)
                 end
             elseif event.type == MOUSE_CLICK.DOUBLE_CLICK then
                 ifield.select_all()