Costum Event Handling

Question

I issue I am trying to get rid off is the following:

I intend to setup a costum event handling chain as a workaround for JavaFX's lack of actioncommands. The issue in particular is, that a menuitem upon clicking it, still fires an ActionEvent instead of the self-written MilvaLabActionEvent. The code:

Event class

package jpt.gui.items;

import javafx.event.ActionEvent;

public class MilvaLabActionEvent extends ActionEvent {
    private static final long serialVersionUID = 6757067652205246280L;

    private String actionCommand ="";

    public MilvaLabActionEvent(String actionCommand2) {
        setActionCommand(actionCommand2);
    }

    public MilvaLabActionEvent() {}

    public String getActionCommand() {
        return actionCommand;
    }

    public void setActionCommand(String actioncommand) {
        this.actionCommand = actioncommand;
    }
}

My EventHandler:

package jpt.gui.items;

import javafx.event.EventHandler;
import jpt.MilvaLabGlobal;
import jpt.MilvaLabKonst;
import jpt.handle.MilvaLabDateiHandle;
import jpt.handle.MilvaLabEinHandle;
import jpt.handle.MilvaLabHilfeHandle;
import jpt.handle.MilvaLabMilvaHandle;
import jpt.handle.MilvaLabRvAnwendungHandle;
import jpt.handle.MilvaLabrvTextHandle;
import jpt.log4j.MilvaLabLogger;

public class MilvaLabEventHandler implements EventHandler<MilvaLabActionEvent>{

    @Override
    public void handle(MilvaLabActionEvent event) {     
        // the command string of the menu item
        final String sCmd = event.getActionCommand();

        if (sCmd.charAt(0) == 'M')
        {//doing something here
        }
}

The costum MenuItem-Class I figured out I gotta write.

package jpt.gui.items;

import javafx.event.Event;
import javafx.scene.control.MenuItem;

public class MilvaLabMenuItem extends MenuItem {
    private String actionCommand;

    public MilvaLabMenuItem(String sText) {
        this.setText(sText);
    }
    @Override
    public void fire() {
        Event.fireEvent(this, new MilvaLabActionEvent(getActionCommand()));

    }

    public String getActionCommand() {
        return actionCommand;
    }
    public void setActionCommand(String actionCommand) {
        this.actionCommand = actionCommand;
    }
}

And the initialization of the costum MenuItem:

final MilvaLabMenuItem jmi = new MilvaLabMenuItem("I am a menuItem");
        jmi.addEventHandler(evtype, new MilvaLabEventHandler());
        jmi.setOnAction((event) -> {
            System.out.print("I have fired an ActionEvent!");
        });

Well, as of now, I got "I have fired an ActionEvent" when I click on the MilvaLabMenuItem, nothing else happens. (Looked into that thing already using the debugger). What I want to happen is that, obviously, the MilvaLabEventHandler is called.

score 0 · Accepted Answer · answered Dec 15 '17 at 10:35

0

I figured it out again. I declared two EventTypes, though, only one was necessary.

This helped me finding the solution, though, they use Nodes instead of MenuItems. How to emit and handle custom events?

answered Dec 15 '17 at 10:35

M. Klingert

35
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Costum Event Handling

1 Answers1