is there any way to get this to be a bidirectional binding?

objectBinding

returns a

Binding

and

bindBidirectional

expects a

Property

where

selectedNavigationItem

and the values of

itemMap

are an enum that corresponds to the menu item.

what are you trying to do here?

i have a NavigationViewModel that contains a list of enums that represent the menu items, text, graphics, etc. and a

selectedNavigationItem

. I want to correctly bind my listmenu to that model so that if the user clicks on a menu item it shows as the active item as usual and the model changes. That part works with

bind

. But ideally i'd like to be able to change the

NavigationViewModel::selectedNavigationItem

from elsewhere and have the active item in the listmenu update correctly as well

do you use

ListView

?

in this case no its the listmenu from tornadofx

hm

why don't you use

bindBidirectional

instead of

bind

?

or you can create your own

Binding

that was the question, the problem is i need to use

objectBinding

to map from what the menu uses and my enums. but that returns a

Binding

and bindBidirectional needs a

Property

or so that is what it is complaining about

it needs a

Property

because a

Binding

is not a

WritableValue

tornadofx bind() is javafx bidirectionalBind()

why is it bidirectional by default?

that can't be right... i get "can't set bound property" anytime i use bind

:x

it happens when you have an unidirectional binding an you try to set the value of the property

ok so the question still remains... i get why

bindBidirectional

needs a property, and i get why

objectBinding

returns a

Binding

... particularly because i'm only supplying it with a one way mapping from my menuitem to the enum. But I have to assume there is a way to do something like

objectBinding

where i can specify both directions to map? so i can get a property out of it

I just don't know what that is

why don't you have 2 `Binding`s, one in both directions?

because of "can't set bound property"

if i bind it unidirectionally, i can't then bind it unidirectionally the other direction as well

what I meant is that you don't use unidirectional binding at all

but 2 `Binding`s instead

yeah THAT is my question.. right now i can't seem to NOT do unidirectional.. it doesn't let me because objectBinding returns a Binding and thus it becomes unidirectional

can you show us some code?

i'm not sure I follow

a gist would be nice

yeah give me a few to clean it up and narrow things down