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dorkbox
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Description

Cross-platform SystemTray support for Swing/AWT, GtkStatusIcon, and AppIndicator on Java 8+

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Professional, cross-platform SystemTray support for Swing/AWT, GtkStatusIcon, and AppIndicator on Java 6+.

This library provides OS Native menus and Swing/AWT menus, depending on the OS and Desktop Environment and if AutoDetect (the default) is enabled.

  • Linux/Unix will automatically choose Native (GtkStatusIcon or AppIndicator) menus, Windows will choose Native (WindowsNotifyIcon with Swing menus), and MacOS will choose AWT.

  • Please note that the Native and AWT menus follow the specified look and feel of that OS and are limited by what is supported on the OS. Consequently they are not consistent across all platforms and environments.

  • In most cases on Linux/Unix, Native menus are used. In cases where libraries are missing or there are un-resolvable GTK version conflicts, we try to fallback to using Swing.

 

The following unique problems are also solved by this library:
1. Sun/Oracle system-tray icons on Linux/Unix do not support images with transparent backgrounds
1. Sun/Oracle system-tray and SWT system-tray implementations do not support app-indicators, which are necessary on different distributions of Linux/Unix 1. GNOME3 desktop environments hide or remove entirely system tray icons (hidden from 3.16-3.25, removed from 3.26+) 1. Sun/Oracle system-tray menus on Windows look absolutely horrid
1. Sun/Oracle system-tray icons on Windows are hard-coded to a max size of 24x24 (it was last updated in 2006)
1. Sun/Oracle system-tray menus on MacOS do not always respond to both mouse buttons, where Apple menus do
1. Windows native menus do not support images attached to menu entries
1. Windows menus do not support a different L&F from the running application
1. Windows, Linux, and MacOSX menus (native or otherwise) do not support HiDPI configurations 1. java.awt.Desktop.getDesktop() is broken when using GTK3 or on MacOS.

This is for cross-platform use, specifically - linux 32/64, mac 32/64, and windows 32/64. Java 6+

 
 

Linux

MacOS

Windows

 
 

Problems and Restrictions

  • JavaFX uses GTK2 for Java <8, and GTK2 or GTK3 for Java 9+. We try to autodetect this, and are mostly successful. In some situations where it doesn't work. Please set

    SystemTray.FORCE_GTK2=true;
    , or to change JavaFX (9+), use
    -Djdk.gtk.version=3
    to solve this.
  • SWT can use GTK2 or GTK3. If you want to use GTK2 you must force SWT into GTK2 mode via

    System.setProperty("SWT_GTK3", "0");
    before SWT is initialized and only if there are problems with the autodetection, you can also set
    SystemTray.FORCE_GTK2=true;
    .
  • AppIndicators under Ubuntu 16.04 (and possibly other distro's) will not work as a different user without extra work (ie: as a sudo'd user to

    root
    ), since AppIndicators require a dbus connection to the current user's window manager. (see the
    Notes
    below for the details)
  • MacOSX is a special snowflake in how it handles GUI events, and so there are some bizzaro combinations of SWT, JavaFX, and Swing that do not work together. (see the

    Notes
    below for the details)
    • MacOSX native menus cannot display images attached to menu entries. If desired, one could override the default for MacOSX so that it uses Swing instead of AWT, however this will result the SystemTray no-longer supporting the OS theme and transparency. The default of AWT was chosen because it looks much, much better than Swing.
  • Gnome 3: 3.16 - 3.25 (Fedora, Manjaro, Arch, etc) environments by default do not allow the SystemTray icon to be shown. This has been worked around and the tray icon will be placed next to the clock. A different workaround is to install the Top Icons plugin which moves icons from the notification drawer (it is normally collapsed) at the bottom left corner of the screen to the menu panel next to the clock.

  • Gnome 3: 3.26+ (Fedora, Manjaro, Arch, etc) environments by default do not allow the SystemTray icon to be shown. This has been worked around and the tray icon will be placed next to the clock. A different workaround is to install the Appindicator Support plugin which allows the addition of app-indicator icons where one would expect. Additionally, you will need to install

    libappindicator-gtk3
    .
  • ToolTips The maximum length is 64 characters long, and it is not supported on all Operating Systems and Desktop Environments. Specifically, Swing and GtkStatusIcon types support tray tooltips and menu tooltips. AWT and AppIndicator types do not support tooltips of any kind. Please note that Ubuntu uses AppIndicators!

  • Linux/Unix Menus Some Linux environments only support right-click to display the menu, and it is not possible to change the behavior.

  • Linux/Unix and java.awt.Desktop.getDesktop() Please use the

    dorkbox.util.Desktop
    class as a replacement, which will intelligently call the correct OS API to open a folder/directory, email, or browser. (Many thanks to QZ Tray for this).
    • WSL Windows Subsystem for Linux requires some extra work to get a tray icon showing correctly, either by starting java under windows (instead of WSL), or by adding an X-Server.

AutoDetect Compatibility List

OS

Supported
Arch Linux + Gnome3
ChromeOS x
Debian 8.5 + Gnome3
Debian 8.6 + Gnome3
Debian 9.5 + Gnome3
Debian 9.5 + KDE
Debian 9.5 + Cinnamon
Debian 9.5 + MATE
Debian 9.5 + LXDE
Debian 9.5 + XFCE
Elementary OS 0.3.2
Elementary OS 0.4
Elementary OS 5.0 *
Fedora 23
Fedora 24
Fedora 25
Fedora 25 KDE
Fedora 26
Fedora 27
Fedora 28
Fedora 29
FreeBSD 11 + Gnome3
Kali 2016
Kali 2017
LinuxMint 18
Ubuntu 12.04
Ubuntu 14.04
Ubuntu 16.04
Ubuntu 17.04
Ubuntu 17.10
Ubuntu 18.04
UbuntuGnome 16.04
UbuntuGnome 17.04
XUbuntu 16.04
MacOSx
Windows XP
Windows 7
Windows 8.1
Windows 10

Notes:

  • If you have us working on an unlisted OS/DE, please let us know!!

  • The compatibility list only applies while the SystemTray is in

    AutoDetect
    mode. Not all OSes support forcing a custom tray type.
  • Some Linux operating systems with

    GNOME 3
    might require the installation of the app-indicator library as well. We provide feedback when this is necessary. (Arch, Fedora, etc)
  • The menu item callbacks occur on their own dispatch thread (instead of being on whatever OS's event dispatch thread), in order to provide consistent actions across all platforms. It is critical to make sure that access to Swing/etc that depend on running events inside their own

    EDT
    , are properly called. IE:
    SwingUtilities.invokeLater()
    . Do not use
    invokeAndWait()
    as weird GUI anomalies can happen.
  • Ubuntu 16.04+
    with
    JavaFX
    require
    libappindicator1
    because of JavaFX GTK and indicator panel incompatibilities. See more details. We attempt to fallback to using Swing in this situation.
  • Ubuntu 17.04
    , Java only supports the
    X11
    backend.
    MIR
    is not supported.
  • Debian
    +
    GNOME 3
    , SystemTray works, but will only show in a tray via pressing SUPER+M.
  • MacOSX JavaFX
    (Java7) is incompatible with the SystemTray by default. See issue details.
    • To fix this do one of the following
      • Upgrade to Java 8
      • Add :
        -Djavafx.macosx.embedded=true
        as a JVM parameter
      • Set the system property via
        System.setProperty("javafx.macosx.embedded", "true");
        before JavaFX is initialized, used, or accessed. NOTE: You may need to change the class (that your main method is in) so it does NOT extend the JavaFX
        Application
        class.
      • SWT
        builds for
        FreeBSD
        do not exist.
      • ElementaryOS 5.0+
        removed support for appindicators by just not including a library. You can add it back with here.
      • Linux/Unix: If you want to run this library as a different user, you will need to launch your application via
        sudo su username /bin/sh -c "DBUS_SESSION_BUS_ADDRESS='unix:abstract=/tmp/dbus-cLtEoBPmgC' XDG_CURRENT_DESKTOP=$XDG_CURRENT_DESKTOP program-name"
        , where
        unix:abstract=/tmp/dbus-cLtEoBPmgC
        from
        /run/user/{uid}/dbus-session
        . You will also want to disable the root check + warnings via
        SystemTray.ENABLE_ROOT_CHECK=false;
        See issue for more details.
      • Linux/Unix: If you want to create a custom menu for the LAUNCHER icon, you must create a custom
        .desktop
        shortcut in order to create
        Actions
        . Credit to @tresf for figuring this out.

    For example:

    steam launcher screen shot

  [Desktop Entry]
  Name=Steam
  Comment=Application for managing and playing games on Steam
  Exec=/usr/bin/steam %U
  Icon=steam
  Terminal=false
  Type=Application
  Categories=Network;FileTransfer;Game;
  MimeType=x-scheme-handler/steam;
  Actions=Store;Community;Library;Servers;Screenshots;News;Settings;BigPicture;Friends;

And then the executable path and language translations are as follows:

ini
  [Desktop Action Store]
  Name=Store
  Name[de]=Shop
  Name[es]=Tienda
  Name[fr]=Magasin
  Name[it]=Negozio
  Name[pt]=Loja
  Name[ru]=Магазин
  Name[zh_CN]=商店
  Name[zh_TW]=商店
  Exec=steam steam://store

 
 

Customization parameters:

SystemTray.AUTO_SIZE (type boolean, default value 'true')

  • Enables auto-detection for the system tray. This should be mostly successful.

SystemTray.APP_NAME (type String, default value 'SystemTray')

  • Default name of the application, sometimes shows on tray-icon mouse over. Not used for all OSes, but mostly for Linux */

SystemTray.FORCE_GTK2 (type boolean, default value 'false')

  • Forces the system tray to always choose GTK2 (even when GTK3 might be available).

SystemTray.PREFER_GTK3 (type boolean, default value 'true')

  • Prefer to load GTK3 before trying to load GTK2.

SystemTray.FORCE_TRAY_TYPE (type SystemTray.TrayType, default value 'AutoDetect')

  • Forces the system tray detection to be AutoDetect, GtkStatusIcon, AppIndicator, WindowsNotifyIcon, Swing, or AWT. This is an advanced feature, and it is recommended to leave it at AutoDetect.

SystemTray.ENABLE_SHUTDOWN_HOOK (type boolean, default value 'true')

  • When in compatibility mode, and the JavaFX/SWT primary windows are closed, we want to make sure that the SystemTray is also closed. Additionally, when using the Swing tray type, Windows does not always remove the tray icon if the JVM is stopped, and this makes sure that the tray is also removed from the notification area. This property is available to disable this functionality in situations where you do not want this to happen. This is an advanced feature, and it is recommended to leave as true.

SystemTray.AUTO_FIX_INCONSISTENCIES (type boolean, default value 'true')

  • Allows the SystemTray logic to resolve various OS inconsistencies for the SystemTray in different combinations

SystemTray.ENABLE_ROOT_CHECK (type boolean, default value 'true')

  • Allows the SystemTray logic to ignore if root is detected. Usually when running as root it will not work (because of how DBUS operates), but in rare situations, it might work. This is an advanced feature, and it is recommended to leave as true

SystemTray.SWING_UI (type SwingUIFactory, default value 'null')

  • Allows the developer to provide a custom look and feel for the Swing UI, if defined. See the test example for specific use.

SystemTray.DEBUG (type boolean, default value 'false')

  • This property is provided for debugging any errors in the logic used to determine the system-tray type and initialization feedback.

The test application is on Git, and a simple example is as follows: ``` SystemTray.SWING_UI = new CustomSwingUI();

SystemTray systemTray = SystemTray.get();
if (systemTray == null) {
 throw new RuntimeException("Unable to load SystemTray!");
}



try { systemTray.setImage("grey_icon.png"); } catch (IOException e) { e.printStackTrace(); }

systemTray.setStatus("Not Running");

systemTray.getMenu().add(new MenuItem("Quit", new ActionListener() { @Override public void actionPerformed(final ActionEvent e) { systemTray.shutdown(); //System.exit(0); not necessary if all non-daemon threads have stopped. } })).setShortcut('q'); // case does not matter

   
   

Note: This project was heavily influenced by the excellent Lantern project (when it was Java based), Many thanks to them for figuring out AppIndicators via JNA. https://github.com/getlantern/lantern


Note: Gnome-shell users can install an extension to support placing the tray icon next to all 
      of other OS tray icons. By default, all tray icons go to a "Notification drawer" which 
      is initially hidden. 

Note: We have fixed the Swing notification tray on Linux (it no longer has a greyish background), however
      to facilitate this, a screen-shot is grabbed where the icon is. Because this must happen after the
      icon is placed, sometimes you can see this happen. Unfortunately this is the only way to fix
      this problem, and there are no other known workarounds outside of writing an X11 wrapper from scratch.
   
   

ISSUES: 'Trying to remove a child that doesn't believe we're it's parent.'
  This is a known appindicator bug, and is rather old. Some distributions use 
  an OLD version of libappindicator, and will see this error. 
     See: https://github.com/ValveSoftware/steam-for-linux/issues/1077


'gsignal.c: signal 'child-added' is invalid for instance 'xyz' of type 'GtkMenu'' This is a known appindicator bug, and is rather old. Some distributions use an OLD version of libappindicator, and will see this error.

The fallout from this issue (ie: menu entries not displaying) has been worked around, so the menus should still show correctly. See: https://askubuntu.com/questions/364594/has-the-appindicator-or-gtkmenu-api-changed-in-saucy

  
  

Maven Info

... com.dorkbox SystemTray 3.17 ````

Gradle Info

dependencies {
    ...
    compile 'com.dorkbox:SystemTray:3.17'
}

Or if you don't want to use Maven, you can access the latest files and source-code directly from here:
https://git.dorkbox.com/dorkbox/SystemTray/releases

https://repo1.maven.org/maven2/com/dorkbox/SystemTray/
https://repo1.maven.org/maven2/com/dorkbox/ShellExecutor/

https://repo1.maven.org/maven2/net/java/dev/jna/jna/
https://repo1.maven.org/maven2/net/java/dev/jna/jna-platform/
https://repo1.maven.org/maven2/org/slf4j/slf4j-api/
https://repo1.maven.org/maven2/org/javassist/javassist/

License

This project is © 2014 dorkbox llc, and is distributed under the terms of the Apache v2.0 License. See file "LICENSE" for further references.

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