CODEWITHSUNDEEP
javaswingawtjbutton
Hustl3r28
Hustl3r28

Reputation: 211

Manipulating GUI objects in java

consider the following code.

import edu.cmu.ri.createlab.terk.robot.finch.Finch;
import javax.swing.JFrame;
import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.*;

public class RobotControl extends JFrame {
   public static void main (String args[])  {

    RobotControl GUI = new RobotControl();
    GUI.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    GUI.setSize(500,500);
    GUI.setVisible(true);
    GUI.setTitle("RobotControl");
}

//The following are declarations of object variables.
    private Finch myf;
    private JButton front;
    private JButton back;
    private JButton left;


public RobotControl() { 
    myf = new Finch();
    setLayout (new FlowLayout());


    front = new JButton("front");
    add(front);
    front.addActionListener(new FrontButtonListener(myf));
    back = new JButton("back");
    add(back);
    back.addActionListener(new BackButtonListener(myf));
    left = new JButton("left");
    add(left);
    left.addActionListener(new LeftButtonListener(myf));

    }
public class FrontButtonListener implements ActionListener {
    public FrontButtonListener(Finch myf) {
        // TODO Auto-generated constructor stub
    }
                public void actionPerformed(ActionEvent arg0) {
                    myf.setWheelVelocities(100,100,10000);
                }
    }
public class BackButtonListener implements ActionListener{
    public BackButtonListener(Finch myf){   
    }
                public void actionPerformed(ActionEvent arg0) {
                    myf.setWheelVelocities(-100,-100,10000);
                }
    }   
public class LeftButtonListener implements ActionListener{
    public LeftButtonListener(Finch myf){
    }
                public void actionPerformed(ActionEvent arg0){
                    myf.setWheelVelocities(0, 200, 1000);
                }

Now, the code above will create a GUI, with three buttons, front, back, and left. I need some advice on how to make the program wait for all three buttons to be clicked before it runs, as opposed to clicking one button at a time.

Upvotes: 0

Views: 492

Answers (3)

trashgod
trashgod

Reputation: 205875

Use JToggleButton or JCheckBox to retain each button's state. Assuming a List<JToggleButton> named list, you could calculate an allTrue predicate as follows:

boolean allTrue = true;
for (JToggleButton b : list) {
    allTrue &= b.getSelected;
}

Enable the desired functionality only when allTrue is true. A related example is seen here.

Upvotes: 1

Martin Dinov
Martin Dinov

Reputation: 8825

Keep track of the number of them that have been clicked already (with an int). To do this, increment the int only when a button is clicked that hasn't already been clicked (you can keep track of this with a boolean). When the int equals 3, regardless of the order in which the buttons were clicked, call an outside method that does what is currently in the 3 actionPerformed methods. Something like this for the left button, and similarly for the other ones:

    public void actionPerformed(ActionEvent arg0) {
        if(!leftClicked) {
            leftClicked = true;
            numButtonsClicked++;
        }
        countLeftButtonClicks++;
        if(numButtonsClicked == 3) {
            newMethodThatWritesToLogFileToo();
        }
    }

Upvotes: 0

Keerthivasan
Keerthivasan

Reputation: 12890

Create a boolean variable for each button and enable them to true when their correspoding button is clicked.

private  boolean  firstClicked = false;
private  boolean  secondClicked = false;
private  boolean  thirdClicked = false;
......
......
//set these boolean values in their onClick actionPerfomed method
if(firstClicked && secondClicked && thirdClicked){
//do whatever operations you want after three buttons have been clicked
}

Note: You need to have these boolean variables in Class level

Upvotes: 1

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