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11

ScripUI window updates only after callback function is executed

Explorer ,
Nov 24, 2023 Nov 24, 2023

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I built a ScriptUI palette, that calls a function, which takes some time to finnish.

While the function is running, I want to show, whats going on. 

 

To archive this, I tried to change staticText in the palette, before running the function

Unfortunately, the updated text only is shown after the function has finished. Here’s my code:

var dialog = new Window("palette");

var st_processing = dialog.add("statictext", undefined, undefined, {name: "st_processing", truncate: "end"}); 
    st_processing.text = "";
    st_processing.preferredSize.width = 240; 

var ok = dialog.add("button", undefined, undefined, {name: "ok"}); 
    ok.text = "OK"; 
    ok.onClick = function(){
        st_processing.text = "Doing something …";
        function_one();
        // st_processing.text = "";
        // function_two();
        // dialog.close();
    };

dialog.show();

function function_one(){
    // do sth.
}

 

If I un-comment the last three lines in the onClick function, I don’t see anything. 

The way it is now, the function is run and the text is updated only after the function has finnished

 

I tried changing the size of staticText (similar to what Peter Karel is describing in »Fixing display problems in listbox controls« on p 40 in his ScriptUI tutorial).

        st_processing.text = "Doing something …";
        var s = st_processing.size;
        st_processing.size = [s[0] + 1, s[1] + 1];
        st_processing.size = s;

Unfortunately this doesn’t help.

 

I also tried this:

        st_processing.text = "Doing something …";
        st_processing.refresh();

This does actually show the message immediately.

But this way the function is never run. 

 

Is there a way, to show the updated text immediately?

 

Thanks for any suggestions, 

Martin 

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correct answers 1 Correct answer

Guide , Nov 24, 2023 Nov 24, 2023

Try with a different button.

The ok and close buttons are detected by name and handled differently.

 

Have you already used the function update() ? I don't know whether it still works.

Below a screenshot from the Javascript Tools Guide.

DirkBecker_0-1700837665426.png

 

Note also the third paragraph of show(), for your modal dialog experiments.

You'd enter some values in the dialog and perform your actual changes after show() returns.

 

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Community Expert ,
Nov 24, 2023 Nov 24, 2023

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If you want the prompt to appear before you click OK, you should make it part of the dialog, not of the callback.

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Explorer ,
Nov 24, 2023 Nov 24, 2023

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Thanks for your feedback. Maybe I didn’t explain it well. I want this to happen:

 

  • When you open the dialog, the staticText shows nothing.
  • When you click OK, the staticText says something like »processing file 1«.
    The function could process all files in a book, so I would like to update the staticText for each file.
  • After processing is done, the window is closed. 

 

So adding the text to the dialog doesn’t do what I want. 

 

For now, I tried to change the text before the function is run (as shown in my example code). 

I also tried to change it from within "function_one()", but this didn’t change the behaviour.

- Martin 

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Community Expert ,
Nov 24, 2023 Nov 24, 2023

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Aha, ok. Then make the prompt part of the called function, not of the callback:

 

ok.onClick = function(){
  function_one();
  // function_two();
  // dialog.close();
};

dialog.show();

function function_one(){
  st_processing.text = "Doing something …";
  // Do something
  st_processing.text = "";
}

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Explorer ,
Nov 24, 2023 Nov 24, 2023

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HI @Peter Kahrel! I tried this before, without success.
Just to be sure, I made another attempt. Still doesn’t work. 

 

To see what’s going on, I added a bunch of alerts: 

 

ok.onClick = function(){
  alert("1 " + st_processing.text);
  function_one();
  alert("4 " + st_processing.text);
};

dialog.show();

function function_one(){
  st_processing.text = "Doing something …";
  alert("2 " + st_processing.text);
  // Do something
  st_processing.text = "";
  alert("3 " + st_processing.text);}

 

With the alerts it does exactly what one would expect:

  • alerts are shown in the correct order
  • they always display the expected text
  • text in the palette is updated properly

 

As soon as I remove the alerts, it’s going back to the way it behaved before. 

 

This is in noy way critical, so I think I will just leave it as it is (without any feedback on progress).

 

Thanks, Martin 

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Community Expert ,
Nov 24, 2023 Nov 24, 2023

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Ok, one last shot then. It works ok for me (if I understand  it correctly). Open the Pages panel, then use the below amendments. I added sleeps so that you can actually see what happens. When I run this, I can see the prompts change when the functions are called.

 

ok.onClick = function(){
  function_one();
  function_two();
};


function function_one(){
  st_processing.text = "Doing something …";
  var d = app.documents.add();
  for (var i = 0; i < 10; i++) {
    d.pages.add();
    $.sleep(140);
  }
  st_processing.text = "";
}

function function_two(){
  st_processing.text = "Doing something else …";
  var p = app.documents[0].pages.everyItem().getElements();
  for (var i = p.length-1; i > 0; i--) {
    p[i].remove();
    $.sleep(140);
  }
  st_processing.text = "";
}

 

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Explorer ,
Nov 24, 2023 Nov 24, 2023

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I’m pretty sure, when I tried, I did exactly what you do in function_one(), but It didn’t work at all, when I tried it.

 

With your script, it immediately shows »Doing something …«. 

But it never shows »Doing something else …«.

 

I did keep my dialog code, removed everything else and added your two functions. 

Besides that, I did restart InDesign, to make sure, there’s nothing in memory that could interfere. 

 

However, when I change your function_one() to app.documents[0], it doesn’t work either:

// var d = app.documents.add();
var d = app.documents[0];

 

It seems to me, like InDesign only updates if something changes in the UI (like an alert or a new doc). For my script this could actually do it:

For now, I’m only working on the active document. But the main goal of my script is, to open all documents of a book (seperately) and find some information. In a second step, I will open the documents again and modify said information. 

With what I found out with your help, I think it’s very likely, I get an visible update of my window for each opened document. 

 

I still don’t understand, why you see »Doing something else …«, and I don’t. 

 

Thank’s again, 

Martin 

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Guide ,
Nov 24, 2023 Nov 24, 2023

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Try with a different button.

The ok and close buttons are detected by name and handled differently.

 

Have you already used the function update() ? I don't know whether it still works.

Below a screenshot from the Javascript Tools Guide.

DirkBecker_0-1700837665426.png

 

Note also the third paragraph of show(), for your modal dialog experiments.

You'd enter some values in the dialog and perform your actual changes after show() returns.

 

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Explorer ,
Nov 24, 2023 Nov 24, 2023

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Thanks a lot!

window.update() did the trick.

It is so much nicer, if the panel can give some feedback.

Martin

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