Re: enterNestedEventLoop as public API?

[John Hendrikx]

Hi Anthony,

I just filed https://javafx-jira.kenai.com/browse/RT-34268 for this.

--John

On 13/11/2013 17:42, Anthony Petrov wrote:

Hi John,

Please file an RFE to introduce this public API.

--
best regards,
Anthony

On 11/13/2013 08:35 PM, John Hendrikx wrote:

On 13/11/2013 16:35, Stephen F Northover wrote:

What is the difference?

Dialog d = new Dialog() {
   public void onClose() {
      Platform.exitNestedEventLoop();
   }
}
Platform.enterNestedEventLoop();

I find the current API to work well, it is just in the wrong package
tree :)

Considering I didn't know about nested event loops before, I find the
solution quite elegant -- leave the old event loop on the call stack,
and start a fresh one that can be exited to continue again where the
main event loop was halted -- it's almost like a 2nd thread gets
started, but there isn't :)

--John

Steve

On 2013-11-13 5:28 AM, Tom Schindl wrote:

What bothers me with the API as it is today is that I have call
enter/exit, I would find it more easy to work with an API like:

-------8<-------
WaitCondition c = new WaitCondition();
Dialog d = new Dialog() {
    public void onClose() {
       c.release();
    }
}
Platform.spinNestedEventLoop(c);
------->8-------

Tom

On 13.11.13 11:18, Artem Ananiev wrote:

I also think it's a good request for public API. In AWT/Swing, people
had been using ugly workarounds with modal dialogs just to enter a
nested event loop, until public java.awt API was finally provided:

http://docs.oracle.com/javase/7/docs/api/java/awt/SecondaryLoop.html

http://docs.oracle.com/javase/7/docs/api/java/awt/EventQueue.html#createSecondaryLoop()

The same is here in JavaFX: unless Toolkit.enter/exitNestedEventLoop()

is exposed at javafx.* level, people will have to workaround it by
using
Stage, or calling into com.sun.javafx.*, which is not good.

Thanks,

Artem

On 11/13/2013 10:15 AM, John Hendrikx wrote:

Hi List,

Any chance that Toolkit.getToolkit().enterNestedEventLoop() will in
the
future become public API?

I'm currently using this to create Dialogs based on a Pane to avoid
creating Stages (which have the nice show and showAndWait
functionality).  I duplicated this functionality in a Pane,
allowing me

to create Dialogs on top of existing Scenes without creating a Stage,

and it makes use of the enterNestedEventLoop and exitNestedEventLoop
functions in com.sun.javafx.tk.Toolkit.

The reason I'm avoiding the Stages is because they donot play well
with
an application that never has the mouse or keyboard focus (my
application is fully remote controlled) -- creating a Stage, even
one to
just show a Dialog, will cause Windows to try and attract the user's
attention by flashing its taskbar button (for which I filed a
bug/feature request) and this is undesired.

Regards,
John

(Here's a part of the DialogPane to show and close it:)

    public R showDialog(Scene scene, boolean synchronous) {
      this.synchronous = synchronous;
      this.scene = scene;
      this.oldFocusOwner = scene.getFocusOwner();

      Parent root = scene.getRoot();

      stackPane.getChildren().add(root);
      stackPane.getChildren().add(this);

      scene.setRoot(stackPane);

      requestFocus();

      if(synchronous) {
        return (R)Toolkit.getToolkit().enterNestedEventLoop(this);
      }

      return null;
    }

    public void close() {

Parent originalRoot = (Parent)stackPane.getChildren().remove(0);

      scene.setRoot(originalRoot);
      scene = null;

      if(oldFocusOwner != null) {
        oldFocusOwner.requestFocus();
      }

      if(synchronous) {
        Toolkit.getToolkit().exitNestedEventLoop(this, getResult());
      }
    }