programatically go back

[howud...@gmail.com]

Is there a way to programatically go back?  Before in the old state machine there was back().  Now with the newest framework, I cant find back().  I'm not using the new GUI builder, I am coding all by hand

ConnectionRequest r = new ConnectionRequest() {
  protected void readResponse(InputStream input) throws IOException {
     String sError = "This would be set by server";
  }
  protected void postResponse() {
     if (!sError.equals("error")
       goBack();
  }
};

[shyam tha]

Hi 
Hope the following code will help you so please check it
ConnectionRequest r = new ConnectionRequest(StateMachine sm ) {

  protected void readResponse(InputStream input) throws IOException {
     String sError = "This would be set by server";
  }
  protected void postResponse() {
     if (!sError.equals("error")

      sm.back();
  }
};

[Peter Carlson]

ConnectionRequest does not have a constructor with StateMachine

ConnectionRequest r = new ConnectionRequest(StateMachine sm )

^^^ StateMachine cannot be resolved to a variable. 

There are no available imports for StateMachine.

[shyam tha]

Please check this and hope there will not be any problem now

public void connection(final StateMachine sm ){

ConnectionRequest r = new ConnectionRequest() {
  protected void readResponse(InputStream input) throws IOException {
     String sError = "This would be set by server";
  }
  protected void postResponse() {
     if (!sError.equals("error")

   sm.back();
  }
};

[howud...@gmail.com]

As far as I understand it the "StateMachine" no longer exists, or at least not in the form to which you refer.  At the minimum it does not exist in my project.

I have noticed this weird behaviour:

if I store a handle to the parent form and then call parent.showBack()

• Just call parent.showBack() with no notification it will nicely go back to the previous form.  
  
• If I call Dialog.show() first and then call parent.showBack() it doesn't go back.  
  
• If I use ToastBar it does go back, but the ToastBar disappears immediately.
  

ConnectionRequest r = new ConnectionRequest() {

@Override

protected void readResponse(InputStream input) throws IOException {

//parse result for error

}

@Override

protected void postResponse() {

if (sResult.equals("error"))

MessageBox.OK(sErrorMsg, "Unable to Save");

else {

MessageBox.OK("Data Saved", "Info");  <<< Wont go back

MessageBox.TOAST("Data Saved");       <<< goes back but Toast disappears immediately

parent.showBack();

}

}

};

public class MessageBox {

public static void OK(String msg, String title) {

        Dialog.show(title, msg, "OK", null);

}

public static boolean OKCANCEL(String msg, String title) {

        return Dialog.show(title, msg, "OK", "Cancel");

}

public static void TOAST(String msg) {

TOAST(msg, 2500);

}

public static void TOAST(String msg, int delay) {

ToastBar.Status status = ToastBar.getInstance().createStatus();

status.setMessage(msg);

status.setExpires(delay);

status.show();

}

}

Peter

[Shai Almog]

When a Dialog is disposed it goes to the form that showed it. ToastBar is bound to a specific form so it won't work as expected either.

The solution is to showBack() and use an addShowListener before that. Within the show listener show your toastbar or dialog. This will do the back transition first and then show the dialog/toast.

[howud...@gmail.com]

ok, this solution works for an error situation.  However I am seeing similar weird behaviour when I do:

Form1 visible, click on button to show Form 2

Form2 during constructor calls toastbar and retrieves information from the server

Form2 click on "back" calls parent.showBack()

Form1 is reloaded but with toastbar visible and blocking.

Peter

[howud...@gmail.com]

well all day yesterday it was failing as described.   Today it seems to work fine...sigh

[Shai Almog]

That's a race condition.
Notice that the error methods are called off the EDT so you need to use callSerially().

[howud...@gmail.com]

I dont see any race condition, and for some reason the problem is back, but sporadic, again the steps: ( I added a few lines for clarity)

Form1 visible, click on button to show Form 2

Form2 during constructor calls toastbar and retrieves information from the server

Information is retrived no errors

Form2 click on "back" calls parent.showBack()

Form1 is reloaded but for some reason the toastbar is visible and blocking.

[Shai Almog]

Again the error callback is off the EDT. If something happens sometimes "oddly" it's a race.