i’m curious what you need this for? do you know about the built in calculator which can be activated by clicking in the edit box of any spinner and pressing Ctrl+n ?

I know about Numerical Expression Evaluator, but you need always to select something to be able to activate the spinners and run it.

here is n advanced version

   try(destroydialog ExpCalculator) catch() 
rollout ExpCalculator "Expression Calculator by denisT" width:400
(
	fn isLinkable t = (iscontroller t.anim) and t.anim.keyable and (matchpattern ((classof t.anim) as string) pattern:"*_float")
	edittext calc pos:[12,3] width:0
	edittext result "=" labelOnTop:off readOnly:on pos:[4,26] fieldwidth:96
	spinner binder range:[-1e9,1e9,0] type:#float visible:off pos:[0,-20]
	checkbutton link "Link" width:40 pos:[116,24] tooltip:"Links the result to the specified controller
RC - Unlink"
	label track "" pos:[164,28] width:10000
	
	timer mover active:off interval:50
	
	fn makePickOptions =
	(
		local v = 0
		for b in #{9,10,15} do v = bit.set v b on
		v
	)
	local pickoptions = makePickOptions()
	
	local start
	on mover tick do if mouse.pos != start do
	(
		setdialogpos ExpCalculator ((getdialogpos ExpCalculator) + mouse.pos - start)
		start = mouse.pos
	)
	on calc changed text do 
	(
		val = try (execute text) catch()
		result.text = if val == undefined then "" else val as string
		if (try(val as float) catch()) != undefined do binder.value = val
	)
	on link changed state do 
	(
		if state do
		(
			t = trackView.pickTrackDlg isLinkable options:pickoptions
			if t != undefined and iscontroller t.anim do
			(
				binder.controller = t.anim
				track.text = exprForMAXObject t.anim
			)
		)
		link.state = off
	)
	on link rightclick do 
	(
		binder.controller = undefined
		track.text = ""
		link.state = off
	)
	
	fn onResized = 
	(
		calc.width = ExpCalculator.width - 20
	)
	on ExpCalculator resized size do onResized()
	on ExpCalculator lbuttondown pos do
	(
		start = mouse.pos
		mover.active = on
	)
	on ExpCalculator lbuttonup pos do mover.active = off
	on ExpCalculator rbuttonup pos do destroydialog ExpCalculator

	on ExpCalculator open do 
	(
		onResized()
	)
	on ExpCalculator close do 
	(
		mover.active = off
	)
)
createDialog ExpCalculator style:#(#style_resizing, #style_border) lockHeight:on	

   

edit: a minor bug fixed

and finaly the PRO version made as macroscript.
it remembers dialog’s position and size, and recently linked controller…

macroScript ExpCalculator
	category:"DTS"
	buttonText:"Exp CALC"
	toolTip:"Expression Calculator by denisT"
	autoUndoEnabled:off
	silentErrors:off
(
	rollout ExpCalculator "Expression Calculator by denisT" width:400
	(
		local opened
		local position = unsupplied, size = unsupplied
		
		
		fn isLinkable t = (iscontroller t.anim) and t.anim.keyable and (matchpattern ((classof t.anim) as string) pattern:"*_float")
		local anim = if anim != undefined do anim
		
		edittext calc pos:[12,3] width:0
		edittext result "=" labelOnTop:off readOnly:on pos:[4,26] fieldwidth:96
		spinner binder range:[-1e9,1e9,0] type:#float visible:off pos:[0,-20]
		checkbutton link "Link" width:40 pos:[116,24] tooltip:"Links the result to the specified controller
RC - Unlink"
		label track "" pos:[164,28] width:10000
		
		timer mover active:off interval:50
		
		fn makePickOptions =
		(
			local v = 0
			for b in #{9,10,15} do v = bit.set v b on
			v
		)
		local pickoptions = makePickOptions()
		
		local start
		on mover tick do if mouse.pos != start do
		(
			setdialogpos ExpCalculator ((getdialogpos ExpCalculator) + mouse.pos - start)
			start = mouse.pos
		)
		on calc changed text do 
		(
			val = try (execute text) catch()
			result.text = if val == undefined then "" else val as string
			if (try(val as float) catch()) != undefined do binder.value = val
		)
		on link changed state do 
		(
			if state do
			(
				t = trackView.pickTrackDlg isLinkable options:pickoptions
				if t != undefined and iscontroller t.anim do
				(
					binder.controller = anim = t.anim
					track.text = exprForMAXObject t.anim
				)
			)
			link.state = off
		)
		on link rightclick do 
		(
			binder.controller = anim = undefined
			track.text = ""
			link.state = off
		)
		
		on ExpCalculator lbuttondown pos do
		(
			start = mouse.pos
			mover.active = on
		)
		on ExpCalculator lbuttonup pos do mover.active = off
		on ExpCalculator rbuttonup pos do destroydialog ExpCalculator

		fn onResized = (calc.width = ExpCalculator.width - 20)
		on ExpCalculator resized s do onResized()
		on ExpCalculator open do 
		(
			opened = on
			onResized()
			if iscontroller anim do 
			(
				binder.controller = anim
				track.text = exprForMAXObject anim
			)
		)
		on ExpCalculator close do 
		(
			mover.active = off
			opened = off
			position = getdialogpos ExpCalculator 
			size = ExpCalculator.width
			updateToolbarButtons()
		)
	)
	local dialog = ExpCalculator
	
	on isChecked do dialog.opened
	on execute do 
	(
		if dialog.open then destroydialog dialog
		else createDialog dialog style:#(#style_resizing, #style_border) pos:dialog.position width:dialog.size lockHeight:on
	)
)

did i forget anything? any cool features to add?