Class User32Util.MessageLoopThread

  • All Implemented Interfaces:
    Runnable
    Enclosing class:
    User32Util

    public static class User32Util.MessageLoopThread
    extends Thread
    Helper class, that runs a windows message loop as a seperate thread. This is intended to be used in conjunction with APIs, that need a spinning message loop. One example for this are the DDE functions, that can only be used if a message loop is present. To enable interaction with the mainloop the MessageLoopThread allows to dispatch callables into the mainloop and let these Callables be invoked on the message thread. This implies, that the Callables should block the loop as short as possible.
    • Constructor Detail

      • MessageLoopThread

        public MessageLoopThread()
    • Method Detail

      • run

        public void run()
        Specified by:
        run in interface Runnable
        Overrides:
        run in class Thread
      • exit

        public void exit()
      • getMessageFailed

        protected boolean getMessageFailed()
        The method is called from the thread, that run the message dispatcher, when the call to User32.GetMessage(com.sun.jna.platform.win32.WinUser.MSG, com.sun.jna.platform.win32.WinDef.HWND, int, int) fails (returns -1).

        If the method returns true, the MainLoop is exitted, if it returns false the mainloop is resumed.

        Default behavior: The error code is logged to the com.sun.jna.platform.win32.User32Util.MessageLoopThread logger and the main loop exists.

        Returns:
        true if MainLoop should exit, false it it should resume