Comment ajouter une barre de défilement dans une mise en page nulle ?
https://stackoverflow.com//questions/21058395
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22-12-2019 - |
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J'ai essayé d'avoir une barre de défilement sur mon JTextArea pendant des jours, j'ai essayé toutes les manières possibles de le faire.Je crée un client de chat et j'ai la configuration JPanel avec une mise en page nulle.J'ai essayé d'utiliser les gestionnaires de mise en page, mais je ne comprends pas comment le faire ressembler à ce que je souhaite.
Je veux juste une barre de défilement sur la zone de texte.Je suis débutant et d'après ce que j'ai lu il n'est pas possible d'en avoir un avec une mise en page nulle ?Je suis prêt à aider à modifier la mise en page si cela est également plus facile.
package guiserver;
import com.apple.eawt.Application;
import java.awt.Canvas;
import java.awt.Color;
import java.awt.FlowLayout;
import java.awt.Graphics;
import java.awt.Image;
import java.awt.Toolkit;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.io.BufferedReader;
import java.io.DataOutputStream;
import java.io.InputStreamReader;
import java.io.PrintWriter;
import java.net.InetAddress;
import java.net.ServerSocket;
import java.net.Socket;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JPasswordField;
import javax.swing.JScrollPane;
import javax.swing.JSplitPane;
import javax.swing.JTextArea;
import javax.swing.JTextField;
import javax.swing.SwingConstants;
import javax.swing.WindowConstants;
public class GUIserver extends JFrame implements ActionListener {
JFrame login = new JFrame();
JPanel panel = new JPanel();
JPanel main = new JPanel();
JFrame accept = new JFrame();
JPanel acpt = new JPanel();
JPanel buttonpanel = new JPanel();
JButton acceptinvite = new JButton("Accept Invite");
JButton denyinvite = new JButton("Deny Invite");
JLabel acceptlabel = new JLabel();
JLabel acceptname = new JLabel();
JPanel loginpanel = new JPanel();
JTextArea chat = new JTextArea(" Waiting to Start Client...");
JSplitPane chatsplit = new JSplitPane(JSplitPane.VERTICAL_SPLIT);
JTextField input = new JTextField();
JScrollPane pane = new JScrollPane(chat);
JButton send = new JButton("Send");
JLabel IP = new JLabel("IP:... ");
JButton start = new JButton("Start");
sendThread s1 = new sendThread();
fromThread f1 = new fromThread();
infoFromThread f2 = new infoFromThread();
infoToThread s2 = new infoToThread();
RPSpickTimer pt = new RPSpickTimer();
myCanvas contact = new myCanvas();
myCanvas logo = new myCanvas();
JButton rock = new JButton("Rock");
JButton paper = new JButton("Paper");
JButton scissors = new JButton("Scissors");
JTextField username = new JTextField();
JLabel loguser = new JLabel("Username:");
JLabel logpass = new JLabel("Password:");
JPasswordField password = new JPasswordField();
JButton signin = new JButton("Sign in");
String inputText = "0";
String chatCurrent;
String out1;
String in;
boolean pause = true;
boolean rps = false;
int P1pick = 0;
int P2pick = 0;
String user = "User 1";
String user2 = "Jacob Abthorpe";
String pass;
int badge;
int sendinvite = 0;
char answerinvite = '-';
boolean pauseInfo = true;
int winner = 0;
public GUIserver() {
Application application = Application.getApplication();
Image image = Toolkit.getDefaultToolkit().getImage("src/icon.png");
application.setDockIconImage(image);
login.setVisible(true);
login.setSize(400, 500);
login.setLocationRelativeTo(null);
login.setTitle("Login");
login.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
login.add(loginpanel);
loginpanel.setLayout(null);
loginpanel.add(username);
loginpanel.add(password);
loginpanel.add(signin);
loginpanel.add(logpass);
loginpanel.add(loguser);
loginpanel.add(logo);
login.setAlwaysOnTop(true);
username.setHorizontalAlignment(JTextField.CENTER);
password.setHorizontalAlignment(JTextField.CENTER);
username.setBounds(50, 290, 300, 30);
password.setBounds(50, 350, 300, 30);
loguser.setBounds(55, 265, 300, 30);
logpass.setBounds(55, 325, 300, 30);
signin.setBounds(150, 400, 100, 30);
logo.setBounds(110, 50, 150, 150);
username.addActionListener(this);
password.addActionListener(this);
signin.addActionListener(this);
setVisible(false);
setSize(500, 600);
setLocationRelativeTo(null);
setTitle("Chat Server Client");
setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
setAlwaysOnTop(true);
panel.setLayout(null);
panel.setLocation(300, 0);
panel.add(pane);
panel.add(input);
panel.add(send);
panel.add(IP);
panel.add(start);
panel.add(rock);
panel.add(paper);
panel.add(scissors);
contact.picx = 120;
contact.picy = 120;
contact.setBackground(Color.white);
contact.setBounds(370, 10, 120, 120);
panel.add(contact);
input.addActionListener(this);
send.addActionListener(this);
start.addActionListener(this);
rock.addActionListener(this);
paper.addActionListener(this);
scissors.addActionListener(this);
chat.setEditable(false);
pane.setBounds(10, 10, 350, 450);
input.setEditable(false);
input.setBounds(10, 470, 350, 80);
start.setBounds(370, 470, 115, 80);
IP.setBounds(15, 520, 480, 80);
rock.setVisible(false);
paper.setVisible(false);
scissors.setVisible(false);
scissors.setBounds(370, 430, 115, 30);
paper.setBounds(370, 400, 115, 30);
rock.setBounds(370, 370, 115, 30);
setContentPane(panel);
accept.setVisible(false);
accept.setSize(400, 125);
accept.setLocationRelativeTo(null);
accept.setTitle("Rock, Paper, Scissors");
accept.setAlwaysOnTop(true);
accept.setResizable(false);
accept.add(acpt);
acpt.setLayout(null);
acpt.add(acceptlabel);
acpt.add(buttonpanel);
acpt.add(acceptname);
buttonpanel.setBounds(0, 60, 400, 40);
buttonpanel.setLayout(new FlowLayout());
acceptlabel.setHorizontalAlignment(SwingConstants.CENTER);
acceptlabel.setText("would like to play Rock, Paper, Scissors. Accept?");
acceptlabel.setBounds(0, 25, 400, 40);
acceptname.setHorizontalAlignment(SwingConstants.CENTER);
acceptname.setText(user2 + "");
acceptname.setBounds(0, 3, 400, 40);
buttonpanel.add(acceptinvite);
buttonpanel.add(denyinvite);
acceptinvite.addActionListener(this);
denyinvite.addActionListener(this);
}
public void actionPerformed(ActionEvent e) {
if (e.getSource() == input) {
if (input.getText().startsWith("/")) {
if (input.getText().contentEquals("/")) {
chat.append("\n\n >Type '/help' for list of all commands");
}
if (input.getText().contentEquals("/start RPS")) {
chat.append("\n \n >Waiting for opponent to accept invite. . .");
pauseInfo = false;
sendinvite = 10;
}
if (input.getText().contentEquals("/help")) {
chat.append("\n\n >Type '/help' for list of all commands");
chat.append("\n >Type '/start RPS' to play Rock Paper Scissors");
chat.append("\n >Type '/end' to quit current game");
}
if (input.getText().contentEquals("/end")) {
if (rps == true) {
chat.append("\n\n >Quiting Rock, Paper, Scissors. . .");
rps = false;
rock.setVisible(false);
paper.setVisible(false);
scissors.setVisible(false);
}
}
input.setText("");
} else {
if ((input.getText().contentEquals("")) && (input.getText().contentEquals(" "))) {
Toolkit.getDefaultToolkit().beep();
} else {
pause = false;
chat.append("\n \n " + user + " says: \n " + input.getText());
inputText = input.getText();
input.setText("");
}
}
}
if (e.getSource() == send) {
//chat.append("\n \n Dale Schmidt says: \n " + inputText);
//pause = false;
}
if (e.getSource() == username) {
user = username.getText();
}
if (e.getSource() == signin) {
login.setVisible(false);
setVisible(true);
}
if (e.getSource() == start) {
try {
s1.start();
f1.start();
s2.start();
f2.start();
setAlwaysOnTop(false);
chat.append("\n " + InetAddress.getLocalHost() + "\n Server started.");
IP.setText("IP: " + InetAddress.getLocalHost());
start.setVisible(false);
send.setVisible(true);
input.setEditable(true);
send.setBounds(370, 470, 115, 80);
} catch (Exception s) {
System.out.print("YOLOerror starting server");
}
}
if (e.getSource() == rock) {
if ((rps == true) && (P1pick == 0)) {
P1pick = 1;
chat.append("\n\n >You picked 'Rock'");
if (P2pick != 0) {
pt.start();
}
}
}
if (e.getSource() == paper) {
if ((rps == true) && (P1pick == 0)) {
P1pick = 2;
chat.append("\n\n >You picked 'Paper'");
if (P2pick != 0) {
pt.start();
}
}
}
if (e.getSource() == scissors) {
if ((rps == true) && (P1pick == 0)) {
P1pick = 3;
chat.append("\n\n >You picked 'Scissors'");
if (P2pick != 0) {
pt.start();
}
}
}
if (e.getSource() == acceptinvite) {
rps = true;
rock.setVisible(true);
paper.setVisible(true);
scissors.setVisible(true);
answerinvite = 'y';
accept.dispose();
}
if (e.getSource() == denyinvite) {
answerinvite = 'n';
accept.dispose();
}
}
class myCanvas extends Canvas {
int x = 10, y = 10;
int picx = 150, picy = 150;
public void paint(Graphics g) {
Image image1 = Toolkit.getDefaultToolkit().getImage("src/icon.png");
g.drawImage(image1, x, y, picx, picy, this);
}
}
class sendThread extends Thread {
ServerSocket s1;
Socket sendclientSocket = null;
public void run() {
inputText = input.getText();
try {
System.err.println("Starting Send Server");
System.out.println(InetAddress.getLocalHost());
s1 = new ServerSocket(4444);
sendclientSocket = s1.accept();
System.err.println("Started Send Server");
} catch (Exception s1) {
System.exit(1);
}
while (true) {
try {
PrintWriter out = new PrintWriter(sendclientSocket.getOutputStream(), true);
if (pause == false) {
badge = 0;
out.println(input.getText());
System.out.println("sent");
pause = true;
}
} catch (Exception e) {
System.err.println("Error Sending.");
System.err.println(e.getMessage());
System.exit(2);
}
}
}
}
class fromThread extends Thread {
ServerSocket s2;
Socket fromclientSocket = null;
public void run() {
try {
System.err.println("Starting Recieve Server");
s2 = new ServerSocket(4441);
fromclientSocket = s2.accept();
System.err.println("Started Recieve Server");
} catch (Exception s2) {
System.exit(1);
}
while (true) {
try {
BufferedReader in = new BufferedReader(new InputStreamReader(fromclientSocket.getInputStream()));
String fromClient = in.readLine();
if (fromClient.contentEquals("")) {
} else {
Toolkit.getDefaultToolkit().beep();
chat.append("\n\n " + user2 + " says:\n " + fromClient);
badge++;
Application.getApplication().setDockIconBadge(Integer.toString(badge));
}
} catch (Exception e) {
System.err.println("Error Receiving.");
System.err.println(e.getMessage());
System.exit(3);
}
}
}
}
class infoFromThread extends Thread {
ServerSocket s3;
Socket infoFromClientSocket = null;
public void run() {
try {
s3 = new ServerSocket(4446);
infoFromClientSocket = s3.accept();
} catch (Exception s3) {
System.exit(7);
}
while (true) {
try {
BufferedReader in = new BufferedReader(new InputStreamReader(infoFromClientSocket.getInputStream()));
String infoFromClient = in.readLine();
if (infoFromClient.contentEquals("10")) {
accept.setVisible(true);
sendinvite = 0;
} else if (infoFromClient.contentEquals("y")) {
chat.append("\n >Invite Accepted");
rps = true;
rock.setVisible(true);
paper.setVisible(true);
scissors.setVisible(true);
answerinvite = '-';
} else if (infoFromClient.contentEquals("n")) {
chat.append("\n\n >Invite Declined");
answerinvite = '-';
} else if (infoFromClient.contentEquals("1")) {
chat.append("\n\n >Opponent made selection");
P2pick = 1;
if (P1pick != 0) {
pt.start();
}
} else if (infoFromClient.contentEquals("2")) {
chat.append("\n\n >Opponent made selection");
P2pick = 2;
if (P1pick != 0) {
pt.start();
}
} else if (infoFromClient.contentEquals("3")) {
chat.append("\n\n >Opponent made selection");
P2pick = 3;
if (P1pick != 0) {
pt.start();
}
}
} catch (Exception e) {
System.err.println("Error Receiving Information.");
System.err.println(e.getMessage());
System.exit(3);
}
}
}
}
class infoToThread extends Thread {
ServerSocket s4;
Socket infoToClientSocket = null;
public void run() {
inputText = input.getText();
try {
s4 = new ServerSocket(4447);
infoToClientSocket = s4.accept();
} catch (Exception s4) {
System.exit(8);
}
while (true) {
try {
PrintWriter out = new PrintWriter(infoToClientSocket.getOutputStream(), true);
if (sendinvite == 10) {
out.println(sendinvite);
sendinvite = 0;
pauseInfo = false;
}
if ((answerinvite == 'y') || (answerinvite == 'n')) {
out.println(answerinvite);
answerinvite = '-';
}
if (winner == 1) {
out.println("Loser");
}
else if (winner == 2) {
out.println("Winner");
}
else if (winner == 3) {
out.println("Tie");
}
//winner = 0;
//System.err.println("infoToClient");
} catch (Exception e) {
System.err.println("Error Sending Information.");
System.err.println(e.getMessage());
System.exit(2);
}
}
}
}
class RPSpickTimer extends Thread {
public void run() {
while (true) {
try {
if (P1pick != 0) {
if (P1pick == 1) {
if (P2pick == 1) {
//tie
chat.append("\n\n Tie!");
winner = 3;
} else if (P2pick == 2) {
//P2wins
chat.append("\n\n " + user2 + " wins!");
winner = 2;
} else if (P2pick == 3) {
//P1wins
chat.append("\n\n " + user + " wins!");
winner = 1;
}
} else if (P1pick == 2) {
if (P2pick == 1) {
//P1wins
chat.append("\n\n " + user + " wins!");
winner = 1;
} else if (P2pick == 2) {
//tie
chat.append("\n\n Tie!");
winner = 3;
} else if (P2pick == 3) {
//P2wins
chat.append("\n\n " + user2 + " wins!");
winner = 2;
}
} else if (P1pick == 3) {
if (P2pick == 1) {
//P2wins
chat.append("\n\n " + user2 + " wins!");
winner = 2;
} else if (P2pick == 2) {
//P1wins
chat.append("\n\n " + user + " wins!");
winner = 1;
} else if (P2pick == 3) {
//tie
chat.append("\n\n Tie!");
winner = 3;
}
}
P1pick = 0;
P2pick = 0;
}
else {
sleep(250);
}
} catch (Exception e) {
System.err.println("Error Picking Winner.");
System.err.println(e.getMessage());
System.exit(2);
}
}
}
}
public static void main(String[] args) {
GUIserver s = new GUIserver();
}`
La solution
Cette ligne:
panel.add(chat);
Au lieu d'ajouter chat, ajouter pane, comme:
panel.add(pane);
Autres conseils
Depuis JTextZone docs "Le java.awt.TextArea gère en interne le défilement.JTextArea est différent dans le sens où il ne gère pas le défilement, mais implémente l'interface swing Scrollable.Cela lui permet d'être placé dans un JScrollPane si le comportement de défilement est souhaité, et de l'utiliser directement si le défilement n'est pas souhaité.
Je pense que cela signifie que c'est ce que tu veux :
JTextArea chat = new JTextArea(" Waiting to Start Client...");
JScrollPane chatScrollPane = new JScrollPane(chat);
...
panel.setLocation(300, 0);
panel.add(chatScrollPane);
panel.add(input);
Comme Nicolás Carlo l'a souligné, vous disposez déjà du JScrollPane et il vous suffit de l'ajouter à la place du JTextArea.Fondamentalement, le système d'interface utilisateur Java (et la plupart des systèmes d'interface utilisateur) est un arbre géant de widgets.Si vous n'ajoutez pas de widget à l'arborescence, cela n'a aucun effet.Dans ce cas, le JScrollPane n'était pas ajouté à l'arborescence et ne faisait donc rien pour vous.
Ceci n'est pas une réponse, mais une démonstration de la façon dont un LayoutManager pourrait être utilisé pour atteindre les résultats du PO
Donc, sur la base de votre exemple de code, j'obtiens ce résultat...
J'espère que vous remarquerez que le cadre n'est pas assez grand pour contenir le contenu, c'est le problème majeur de null mises en page, elles ne se ressemblent jamais sur d'autres systèmes...
Et en utilisant un GridBagLayout et un GridLayout et un concept connu sous le nom de "mises en page composées", j'ai pu m'en moquer...
import java.awt.EventQueue;
import java.awt.GridBagConstraints;
import java.awt.GridBagLayout;
import java.awt.GridLayout;
import java.awt.Insets;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTextArea;
import javax.swing.JTextField;
import javax.swing.UIManager;
import javax.swing.UnsupportedLookAndFeelException;
public class ChatLayout {
public static void main(String[] args) {
new ChatLayout();
}
public ChatLayout() {
EventQueue.invokeLater(new Runnable() {
@Override
public void run() {
try {
UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
} catch (ClassNotFoundException | InstantiationException | IllegalAccessException | UnsupportedLookAndFeelException ex) {
ex.printStackTrace();
}
JFrame frame = new JFrame("Testing");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.add(new ChatPane());
frame.pack();
frame.setLocationRelativeTo(null);
frame.setVisible(true);
}
});
}
public class ChatPane extends JPanel {
private JTextArea chatWindow;
private JTextField input;
private JLabel ipLabel;
private JButton rockBtn;
private JButton paperBtn;
private JButton scissorsBtn;
private JButton startBtn;
public ChatPane() {
JPanel leftPane = new JPanel(new GridBagLayout());
JPanel rightPane = new JPanel(new GridBagLayout());
chatWindow = new JTextArea(20, 40);
chatWindow.setText("Waiting to start chat...");
input = new JTextField(10);
ipLabel = new JLabel("IP...");
rockBtn = new JButton("Rock");
paperBtn = new JButton("Paper");
scissorsBtn = new JButton("Scissors");
startBtn = new JButton("Start");
setLayout(new GridBagLayout());
GridBagConstraints gbc = new GridBagConstraints();
gbc.insets = new Insets(4, 4, 4, 4);
gbc.gridx = 0;
gbc.gridy = 0;
gbc.fill = GridBagConstraints.BOTH;
gbc.weighty = 1;
gbc.weightx = 1;
leftPane.add(new JScrollPane(chatWindow), gbc);
gbc.gridy++;
gbc.fill = GridBagConstraints.HORIZONTAL;
gbc.weighty = 0;
gbc.weightx = 1;
gbc.gridheight = 1;
leftPane.add(input, gbc);
gbc.gridy++;
gbc.fill = GridBagConstraints.HORIZONTAL;
leftPane.add(ipLabel, gbc);
JPanel buttonsPane = new JPanel(new GridLayout(3, 1));
buttonsPane.add(rockBtn);
buttonsPane.add(paperBtn);
buttonsPane.add(scissorsBtn);
gbc = new GridBagConstraints();
gbc.gridx = 0;
gbc.gridy = 0;
gbc.anchor = GridBagConstraints.SOUTH;
gbc.fill = GridBagConstraints.HORIZONTAL;
gbc.weighty = 1;
rightPane.add(buttonsPane, gbc);
gbc.gridy++;
gbc.insets = new Insets(8, 0, 0, 0);
gbc.fill = GridBagConstraints.BOTH;
gbc.anchor = GridBagConstraints.CENTER;
gbc.weighty = 0;
gbc.gridheight = 2;
gbc.ipadx = 30;
gbc.ipady = 30;
rightPane.add(startBtn, gbc);
gbc = new GridBagConstraints();
gbc.gridx = 0;
gbc.gridy = 0;
gbc.weightx = 1;
gbc.weighty = 1;
gbc.fill = GridBagConstraints.BOTH;
add(leftPane, gbc);
gbc.gridx++;
gbc.weightx = 0;
gbc.weighty = 1;
add(rightPane, gbc);
}
}
}
Maintenant, ce n'est qu'un exemple.Vos besoins peuvent être différents, ce qui nécessiterait l'utilisation de différents gestionnaires de mise en page ou leur utilisation dans différentes combinaisons...
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