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  1. JDK
  2. JDK-8300037

Taskbar::setProgressValue ceases to work when app is launched by jpackage binary

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    • x86_64
    • os_x

    Description

      ADDITIONAL SYSTEM INFORMATION :
      OS: macOS BigSur 11.7 (20G817)
      JDK: OpenJDK 21 Early-Access Build 4 (but also tested for OpenJDK 17, 19, and 20 EA Build 30)

      A DESCRIPTION OF THE PROBLEM :
      Calling Taskbar::setProgressValue shows an OS-provided progress bar on top of the app's icon in the dock. This works as expected. However, when packaging the app into a macOS application bundle using jpackage, the progress bar is not shown. See the steps to reproduce and attached source code for details.

      STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
      Put the attached code into Main.java. Compile the program and create an application image via jpackage:

      javac Main.java
      jar cf app/main.jar Main.class
      jlink --add-modules java.desktop --output rt/
      jpackage --type app-image --runtime-image rt/ --input app/ --main-jar main.jar --main-class Main

      Run Main.app.

      To isolate the cause of the issue, further notice that:
       - When running Main.class using the runtime produced by jlink, the bug does not occur.
       - When running the executable at Main.app/Contents/MacOS/Main, the bug occurs.
      Hence, the binary produced by jpackage appears to cause the problem.

      EXPECTED VERSUS ACTUAL BEHAVIOR :
      EXPECTED -
      A half-completed progress bar should appear on top of the app's icon in the dock.
      ACTUAL -
      No progress bar appears.

      ---------- BEGIN SOURCE ----------
      import java.awt.*;

      public class Main {
          public static void main(String[] args) {
              EventQueue.invokeLater(() -> {
                  new Frame().setVisible(true);
                  Taskbar.getTaskbar().setProgressValue(50);
              });
          }
      }
      ---------- END SOURCE ----------

      FREQUENCY : always


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            achung Alisen Chung
            webbuggrp Webbug Group
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            Dates

              Created:
              Updated: