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POHow do I pause a method until a button is pressed?
 

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  1. POHow do I pause a method until a button is pressed?
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    <p>I am designing a software with multiple components - each with its own actionlistener. For an example, I have a JPanel with a cardlayout that holds 10 cards - each its own JPanel and purpose.</p> <p>On one side, there are multiple buttons, I.E. Login, Logout, Settings, etc.</p> <p>When I click Login, it will switch to the card using the Login() method to the Login JPanel object where I want it to wait for a button to click I.E. Login, New User, or Cancel before continuing the Login() method and setting the current user.</p> <p>Is there a method to pause the program until one of the buttons are clicked to retrieve the data from it? (Kind of like how JOptionPane.showInputMessage(null,"INPUT STRING") waits for you)</p> <p>My Code is below: FRAME:</p> <pre><code>/** * Frame design */ public class Frame extends JFrame{ JPanel LeftSide, UpperRightSide; EmployeeAdder employAdd; ArrayList&lt;ServiceView&gt; serviceViewers; ChartViewer viewChart; PayByView viewPayBy; SettingsViewer viewSettings; LoginViewer viewLogin; CategoryView viewCategory; ServiceAdder serviceAdd; Directory directory; Employee currentEmployee; ChargeViewer viewCharge; JButton Login, Logout, Settings; CardLayout LeftCard,RightCard; String currentCard,currentRightCard; ButtonListen listen; public static String CARDCAT = "Category View"; public static String CARDPAY = "Pay By"; public static String CARDCHART = "Chart View"; public static String CARDLOGIN = "Log-in View"; public static String CARDSERVICEADD = "Service Adder"; Frame(){ listen = new ButtonListen(); //-------Current Card-------------------- currentCard = CARDCAT; currentRightCard = "CHARGE"; //-----First Find Directory Folder------- startDirectory(); //-----User Interface-------------------- //-------Left Side----------------------- LeftSide = new JPanel(); LeftCard = new CardLayout(); LeftSide.setLayout(LeftCard); viewPayBy = new PayByView(); viewLogin = new LoginViewer(); viewChart = new ChartViewer(); viewCategory = new CategoryView(); employAdd = new EmployeeAdder(); serviceAdd = new ServiceAdder(); LeftSide.add(viewCategory,"CAT"); LeftSide.add(viewChart, "CHA"); LeftSide.add(viewLogin,"LOG"); LeftSide.add(viewPayBy,"PAY"); LeftSide.add(employAdd,"EMA"); LeftSide.add(serviceAdd,"SEA"); LeftCard.show(LeftSide, "CAT"); viewCategory.setEnabled(false); LeftSide.setBorder(BorderFactory.createTitledBorder(BorderFactory.createLineBorder(Color.BLACK),currentCard)); serviceViewers = new ArrayList&lt;ServiceView&gt;(); //--------Right Side--------------------- JPanel RightSide = new JPanel(); RightSide.setLayout(new BorderLayout()); UpperRightSide = new JPanel(); RightCard = new CardLayout(); UpperRightSide.setLayout(RightCard); viewSettings = new SettingsViewer(); viewCharge = new ChargeViewer(); viewCharge.setEnabled(false); UpperRightSide.add(viewCharge,"CHARGE"); UpperRightSide.add(viewSettings,"SETTINGS"); UpperRightSide.setPreferredSize(new Dimension(350,500)); RightSide.add(UpperRightSide,BorderLayout.NORTH); //--------Buttons at the bottom Panel--- JPanel Buttons = new JPanel(); Buttons.setLayout(new GridLayout(3,1)); Login = new JButton("LOG-IN"); Login.addActionListener(listen); Logout = new JButton("LOG OUT"); Logout.addActionListener(listen); Settings = new JButton("Settings"); Settings.addActionListener(listen); Buttons.add(Login); Buttons.add(Logout); Buttons.add(Settings); Buttons.setPreferredSize(new Dimension(350,150)); RightSide.add(Buttons,BorderLayout.SOUTH); RightSide.setSize(new Dimension(400,200)); //------Other Stuff-------------------------- //-----add Panels---------------------------- setLayout(new BorderLayout()); add(LeftSide,BorderLayout.WEST); add(RightSide,BorderLayout.EAST); } private void Login(){ LeftCard.show(LeftSide, "LOG"); //----I WANT IT TO WAIT HERE FOR AN ACTION------- int clicked = viewLogin.getClicked(); if (clicked==LoginViewer.NEWUSER){ NewUser(); }else if (clicked==LoginViewer.LOGIN){ if (viewLogin.checkPassword()){ currentEmployee = directory.getEmployee(viewLogin.getSelectedName()); viewCategory.setEnabled(true); viewCharge.setEnabled(true); viewCharge.refreshName(currentEmployee.getName()); LeftCard.show(LeftSide, "CAT"); } }else if (clicked==LoginViewer.CANCEL){ LeftCard.show(LeftSide, "CAT"); } } public class ButtonListen implements ActionListener{ @Override public void actionPerformed(ActionEvent e) { if (!viewLogin.isWaiting()){ if (e.getSource()==Login){ if (currentCard.equals(CARDLOGIN)){ LeftCard.show(LeftSide,"CAT"); currentCard = CARDCAT; }else{ Login(); currentCard = CARDLOGIN; } }else{ //Don't change the screen } } } } } </code></pre> <p>My Code for LoginViewer:</p> <pre><code>public class LoginViewer extends JPanel{ JComboBox User; JPasswordField passField; JButton NewUser, Login, Cancel; Hashtable&lt;String,String&gt; namespass; //names and password private int clicked = -1; ButtonListen listen; public static int NEWUSER = 1; public static int LOGIN = 0; public static int CANCEL = 2; boolean waiting; LoginViewer(){ waiting = false; //--------------------------------------- setPreferredSize(new Dimension(100,100)); listen = new ButtonListen(); namespass = new Hashtable&lt;String,String&gt;(); //----------Panel Design------------------- JPanel Center = new JPanel(); Center.setLayout(new GridLayout(3,3)); User = new JComboBox(); passField = new JPasswordField(); NewUser = new JButton("New User"); NewUser.addActionListener(listen); Login = new JButton("Login"); Login.addActionListener(listen); Cancel = new JButton("Cancel"); Cancel.addActionListener(listen); Center.add(new JLabel("Choose User")); Center.add(User); Center.add(new JLabel("")); Center.add(new JLabel("Type Password")); Center.add(passField); Center.add(new JLabel("")); Center.add(Login); Center.add(NewUser); Center.add(Cancel); Center.setPreferredSize(new Dimension(300,300)); Center.setMaximumSize(new Dimension(100,100)); Center.setAlignmentX(CENTER_ALIGNMENT); setAlignmentX(CENTER_ALIGNMENT); setLayout(new BoxLayout(this,BoxLayout.X_AXIS)); add(Box.createHorizontalGlue()); add(Center); add(Box.createHorizontalGlue()); } public void uploadUserNames(Hashtable&lt;String,String&gt; names){ namespass.clear(); namespass.putAll(names); User.removeAllItems(); Enumeration&lt;String&gt; name = names.keys(); while (name.hasMoreElements()){ User.addItem(name.nextElement()); } } public boolean checkPassword(){ boolean value = false; String key = User.getSelectedItem().toString(); if (passField.getPassword().length==4){ if (namespass.get(key).equals(String.valueOf(passField.getPassword()))){ value = true; } } return value; } public String getSelectedName(){ return User.getSelectedItem().toString(); } public boolean isWaiting(){ return waiting; } public int getClicked(){ waiting = true; return clicked; } public class ButtonListen implements ActionListener{ @Override public void actionPerformed(ActionEvent e) { waiting = false; if (e.getSource()==NewUser){ clicked = 1; }else if (e.getSource()==Login){ clicked = 0; }else if (e.getSource()==Cancel){ clicked = 2; } } } } </code></pre> <p>Or is it easier to just use an actionlistener to listen to ALL of the objects' buttons?</p> <p>There are a LOT of buttons...</p> <p>NOTE: Some of the methods are incomplete or test methods until I know how to make it work...</p>
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