Adding button groups using seesaw

Question

I am creating a GUI using seesaw for the first time and I am stuck on how to add buttons to button groups and display them(buttons) on the same frame. This is what I have so far.

(def b (button :text "Start a new Project"))

(def c (button :text "Continue an Existing Project"))


(def groups (button-group))

(flow-panel :items [(b :group groups)
                        (c :group groups)])

(display groups) 

Answer 1

(button) returns a button (a component) which is not a function. If you later use it as (b :group groups), it actually tries to invoke b as if it was a function, passing it two arguments: :group and groups. That's why it fails, because it can't cast button to function.

Secondly, I believe (button) creates a regular JButton, for which the group makes little sense. Did you mean radio buttons, like (radio)?

One of these two should probably do what you expect.

Radio buttons:

(def groups (button-group))

(def b (radio :text "Start a new Project" :group groups))

(def c (radio :text "Continue an Existing Project" :group groups))

(def panel
  (flow-panel :items [b c]))

(invoke-later
  (-> (frame :content panel :on-close :dispose) pack! show!))

Regular buttons:

(def b (button :text "Start a new Project"))

(def c (button :text "Continue an Existing Project"))

(def panel
  (flow-panel :items [b c]))

(invoke-later
  (-> (frame :content panel :on-close :dispose) pack! show!))

You probably can use your (display) function instead of this (invoke-later) snippet here, but this works end-to-end for me.