how to perform callback from browse button

You asked the same question a couple of months ago, and I gave a suggestion there (to use hiDisplayFileDialog).

Hello Andrew,
Yes i remembered...but i didn't get it.
Can you please help me with example or test-case

Over many months you've had countless examples provided on how to write callback functions and create form and form fields. I would have expected it ought to be clear enough by now (and I've also suggested attending the free online training too). I'm not going to write a full example, but it would be this:

create a "browse" button - button callback will call hiDisplayFileDialog() with appropriate arguments and a callback
create string field that you can type in characters; this doesn't need a callback

The callback for the hiDisplayFileDialog will do whatever processing you want on the selected file and then fill in the string field. This way the path processing only happens when you've used the browse button.

Andrew

Over many months you've had countless examples provided on how to write callback functions and create form and form fields. I would have expected it ought to be clear enough by now (and I've also suggested attending the free online training too). I'm not going to write a full example, but it would be this:

create a "browse" button - button callback will call hiDisplayFileDialog() with appropriate arguments and a callback
create string field that you can type in characters; this doesn't need a callback

The callback for the hiDisplayFileDialog will do whatever processing you want on the selected file and then fill in the string field. This way the path processing only happens when you've used the browse button.

Andrew

thanks for help!

Hi Andrew/everyone.

I tried a test-case below...its working correct but the file browser is coming as soon as load the file without pressing browse button...can you please guide what the glitch?

path_enter = hiCreateStringField(
?name 'path_enter
?defValue "/xyz/cadence/2021.12.22"
)

Entry = hiCreateFormButton(
?name 'Entry
?buttonText "Browse..."
?callback hiDisplayFileDialog(
?dialogName 'myFileDialog
?callback "MyTrimPathCB"
)
)

procedure(MyTrimPathCB(form)
unless(boundp('MyInCallback) && MyInCallback
let((pat (MyInCallback t))
pat=pcreCompile("/[^/]*/[^/]*/[^/]*/[^/]*")
form->path_enter->value=strcat("/xyz/cadence" pcreReplace(pat form->path_enter->value "" 1))
)
)
)

hiCreateAppForm(
;; the form variable is global, this is required
?name 'myTestForm
?formTitle "Browser test form"
?fields list(
list(path_enter 0:0 420:30 50)
list(Entry 430:0 70:30)
)
)
hiDisplayForm(myTestForm)
); let

Hi Saurabh,

Put the hiDisplayFileDialog callback in double quotes, then it will get activated when the button is pressed, rather than when the code is loaded/read.

Best regards,

Lawrence.

Thank you Lawrence!

Hello Lawrence,
am getting error as Error* MyTrimPathCB: too many arguments
for the below script-

path_enter=hiCreateStringField(
?name 'path_enter
?defValue "/xyz/cadence/2021.12.22"
)

Entry=hiCreateButton(
?name 'Entry
?buttonText "Browse..."
?callback strcat("hiDisplayFileDialog(?dialogName 'Select"
" ?mode 'directoryOnly"
" ?callback \"MyTrimPathCB\")")
)

procedure(MyTrimPathCB(form)
unless(boundp('MyInCallback) && MyInCallback
let((pat (MyInCallback t))
pat=pcreCompile("/[^/]*/[^/]*/[^/]*/[^/]*")
form->path_enter->value=strcat("/xyz/cadence" pcreReplace(pat form->path_enter->value "" 1))
)
)
)
)
)

Seriously? You can't diagnose that after all these posts about callbacks? Please read the documentation on hiDisplayFileDialog - it shows that the callback function needs to be defined to take 2 arguments (or 3 if ?userData is passed to hiDisplayFileDialog). Your callback only has one argument which is the form (the arguments need to be the dialog itself and the event).

Because I can't bear this going back and forth longer, here's a small example - showing a clean way of passing the form to the dialog box callback so that your code can update the main form. Call MyDisplayForm() to launch the example form.

procedure(MyCreateForm()
  hiCreateLayoutForm(
    'MyDummyForm
    "Example Form for Forum"
    hiCreateFormLayout(
      'MyLayout
      ?items
        list(
          hiCreateStringField(
            ?name 'filePath
            ?prompt "Path"
          )
          hiCreateButton(
            ?name 'browse
            ?buttonText "Browse"
            ?callback "MyLaunchFileDialog(hiGetCurrentForm())"
          )
        )
    )
  )
)

procedure(MyDisplayForm()
  hiDisplayForm(MyCreateForm())
)

procedure(MyFileDialogCB(dialog event formName)
  ; the user data has to be passed as a symbol, so 
  ; use symeval to get the form itself
  let(((form symeval(formName)))
    printf("EVENT IS %L\n" event)
    when(event=='done
      form->filePath->value=car(hiFileDialogSelection(dialog))
      ; here is where you'd call your TrimCB function
    )
  )
)

procedure(MyLaunchFileDialog(form)
  hiDisplayFileDialog(
    ?dialogName 'MyFileSelect
    ?mode 'directoryOnly
    ?callback "MyFileDialogCB"
    ?userData form->hiFormSym
  )
)