1
我正在編寫一個工具在文本文件上執行一項任務。該任務需要一些時間才能完成,因此我製作了一個顯示文件名和進度百分比的面板。用戶可以在一個或多個文件上運行該任務,因此我需要爲每個文件顯示一個面板。
隨着我到這裏的幫助,我有這個代碼顯示文本區域並添加面板。問題在於,添加新項目時,textarea和麪板列表的增長都是以犧牲對方爲代價的。JSplitPane不顯示項目
import java.awt.event.*;
import javax.swing.*;
import java.util.*;
import java.util.logging.Logger;
public class FProgressDisplay extends JFrame {
private final static Logger LOGGER = Logger.getLogger(FProgressDisplay.class.getName());
private List<PanelTaskProgress> tasks;
JTextArea txtLog;
JButton btnNew;
JButton btnAbort;
JButton btnClose;
static int i;
JPanel taskPanel;
public static void main(String[] args) {
try {
FProgressDisplay frame = new FProgressDisplay();
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setVisible(true);
} catch (Exception e) {
e.printStackTrace();
throw new RuntimeException("Failed to initialize application.");
}
}
/**
* Create the frame.
*/
public FProgressDisplay() {
setTitle("Mask tool - Progress");
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
// should be done AFTER components are added
//pack();
getContentPane().setLayout(new BoxLayout(getContentPane(), BoxLayout.Y_AXIS));
taskPanel = new JPanel();
taskPanel.setLayout(new BoxLayout(taskPanel, BoxLayout.Y_AXIS));
JPanel panel = new JPanel();
getContentPane().add(panel);
btnNew = new JButton("New");
panel.add(btnNew);
btnNew.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent ae) {
addTask(++i, "Task " + i);
}
});
btnAbort = new JButton("Abort");
panel.add(btnAbort);
btnClose = new JButton("Close");
panel.add(btnClose);
txtLog = new JTextArea(10,0);
txtLog.setLineWrap(true);
getContentPane().add(txtLog);
tasks = new ArrayList<PanelTaskProgress>();
JScrollPane scrollPane = new JScrollPane(taskPanel);
getContentPane().add(scrollPane);
for(i = 0; i < 10; i++) {
addTask(i, "Task"+i);
}
pack();
}
public void addTask(long id, String fileName) {
PanelTaskProgress newTaskPanel = new PanelTaskProgress(id, fileName);
tasks.add(newTaskPanel);
taskPanel.add(newTaskPanel);
validate();
//repaint();
LOGGER.info("Added new panel");
}
public class PanelTaskProgress extends JPanel {
private static final long serialVersionUID = 1L;
JLabel lblTaskDescription;
JLabel lblProgress;
private long id;
/**
* Create the panel.
*/
public PanelTaskProgress(long id, String fileName) {
try {
//setLayout(null);
lblTaskDescription = new JLabel(id + " " + fileName);
//lblTaskDescription.setPreferredSize(new Dimension(632, 14));
add(lblTaskDescription);
lblProgress = new JLabel("0%");
lblProgress.setHorizontalAlignment(SwingConstants.CENTER);
//lblProgress.setBounds(664, 11, 51, 14);
add(lblProgress);
LOGGER.info("Created new panel; Id: " + id + "; File: " + fileName);
} catch (Exception e) {
LOGGER.severe("Error creating new panel; " + e.getMessage());
}
}
}
}
我想每個留在自己的領域,如果需要添加滾動:當添加行或點擊新建按鈕,添加面板您可以看到這種情況出現。我試圖在上面的例子中添加一個JSplitPane,但是這兩個窗格都是空的。
import java.awt.event.*;
import javax.swing.*;
import javax.swing.plaf.SplitPaneUI;
import java.util.*;
import java.util.logging.Logger;
public class FProgressDisplay extends JFrame {
private final static Logger LOGGER = Logger
.getLogger(FProgressDisplay.class.getName());
private List<PanelTaskProgress> tasks;
JTextArea txtLog;
JButton btnNew;
JButton btnAbort;
JButton btnClose;
static int i;
JPanel taskPanel;
private JSplitPane splitPane;
public static void main(String[] args) {
try {
FProgressDisplay frame = new FProgressDisplay();
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setVisible(true);
} catch (Exception e) {
e.printStackTrace();
throw new RuntimeException("Failed to initialize application.");
}
}
/**
* Create the frame.
*/
public FProgressDisplay() {
setTitle("Mask tool - Progress");
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
// should be done AFTER components are added
// pack();
getContentPane().setLayout(
new BoxLayout(getContentPane(), BoxLayout.Y_AXIS));
taskPanel = new JPanel();
taskPanel.setLayout(new BoxLayout(taskPanel, BoxLayout.Y_AXIS));
JPanel panel = new JPanel();
getContentPane().add(panel);
btnNew = new JButton("New");
panel.add(btnNew);
btnNew.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent ae) {
addTask(++i, "Task " + i);
}
});
btnAbort = new JButton("Abort");
panel.add(btnAbort);
btnClose = new JButton("Close");
panel.add(btnClose);
txtLog = new JTextArea(10, 0);
txtLog.setLineWrap(true);
//getContentPane().add(txtLog);
tasks = new ArrayList<PanelTaskProgress>();
JScrollPane scrollPane = new JScrollPane(taskPanel);
//getContentPane().add(scrollPane);
splitPane = new JSplitPane(JSplitPane.VERTICAL_SPLIT, txtLog, scrollPane);
splitPane.setDividerLocation(150);
for (i = 0; i < 10; i++) {
addTask(i, "Task" + i);
}
pack();
}
public void addTask(long id, String fileName) {
PanelTaskProgress newTaskPanel = new PanelTaskProgress(id, fileName);
tasks.add(newTaskPanel);
taskPanel.add(newTaskPanel);
validate();
// repaint();
LOGGER.info("Added new panel");
}
public class PanelTaskProgress extends JPanel {
private static final long serialVersionUID = 1L;
JLabel lblTaskDescription;
JLabel lblProgress;
private long id;
/**
* Create the panel.
*/
public PanelTaskProgress(long id, String fileName) {
try {
// setLayout(null);
lblTaskDescription = new JLabel(id + " " + fileName);
// lblTaskDescription.setPreferredSize(new Dimension(632, 14));
add(lblTaskDescription);
lblProgress = new JLabel("0%");
lblProgress.setHorizontalAlignment(SwingConstants.CENTER);
// lblProgress.setBounds(664, 11, 51, 14);
add(lblProgress);
LOGGER.info("Created new panel; Id: " + id + "; File: "
+ fileName);
} catch (Exception e) {
LOGGER.severe("Error creating new panel; " + e.getMessage());
}
}
}
}
這裏是解決方案:
package layout.sscce;
import java.awt.BorderLayout;
import java.awt.event.*;
import javax.swing.*;
import java.util.*;
import java.util.logging.Logger;
public class FProgressDisplay extends JFrame {
private final static Logger LOGGER = Logger
.getLogger(FProgressDisplay.class.getName());
private List<PanelTaskProgress> tasks;
JTextArea txtLog;
JButton btnNew;
JButton btnAbort;
JButton btnClose;
static int i;
JPanel taskPanel;
private JSplitPane splitPane;
public static void main(String[] args) {
try {
FProgressDisplay frame = new FProgressDisplay();
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setVisible(true);
} catch (Exception e) {
e.printStackTrace();
throw new RuntimeException("Failed to initialize application.");
}
}
/**
* Create the frame.
*/
public FProgressDisplay() {
setTitle("Mask tool - Progress");
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
// should be done AFTER components are added
// pack();
// getContentPane().setLayout(
// new BoxLayout(getContentPane(), BoxLayout.Y_AXIS));
getContentPane().setLayout(
new BorderLayout());
taskPanel = new JPanel();
taskPanel.setLayout(new BoxLayout(taskPanel, BoxLayout.Y_AXIS));
JPanel buttonPanel = new JPanel();
getContentPane().add(buttonPanel);
btnNew = new JButton("New");
buttonPanel.add(btnNew);
btnNew.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent ae) {
addTask(++i, "Task " + i);
}
});
btnAbort = new JButton("Abort");
buttonPanel.add(btnAbort);
btnClose = new JButton("Close");
buttonPanel.add(btnClose);
txtLog = new JTextArea(10, 30);
txtLog.setLineWrap(true);
//getContentPane().add(txtLog);
tasks = new ArrayList<PanelTaskProgress>();
JScrollPane taskScrollPane = new JScrollPane(taskPanel);
JScrollPane textScrollPane = new JScrollPane(txtLog);
splitPane = new JSplitPane(JSplitPane.VERTICAL_SPLIT, textScrollPane, taskScrollPane);
splitPane.setDividerLocation(150);
for (i = 0; i < 10; i++) {
addTask(i, "Task" + i);
}
getContentPane().add(buttonPanel, BorderLayout.NORTH);
getContentPane().add(splitPane, BorderLayout.CENTER);
pack();
}
public void addTask(long id, String fileName) {
PanelTaskProgress newTaskPanel = new PanelTaskProgress(id, fileName);
tasks.add(newTaskPanel);
taskPanel.add(newTaskPanel);
validate();
// repaint();
LOGGER.info("Added new panel");
}
public class PanelTaskProgress extends JPanel {
private static final long serialVersionUID = 1L;
JLabel lblTaskDescription;
JLabel lblProgress;
private long id;
/**
* Create the panel.
*/
public PanelTaskProgress(long id, String fileName) {
try {
// setLayout(null);
lblTaskDescription = new JLabel(id + " " + fileName);
// lblTaskDescription.setPreferredSize(new Dimension(632, 14));
add(lblTaskDescription);
lblProgress = new JLabel("0%");
lblProgress.setHorizontalAlignment(SwingConstants.CENTER);
// lblProgress.setBounds(664, 11, 51, 14);
add(lblProgress);
LOGGER.info("Created new panel; Id: " + id + "; File: "
+ fileName);
} catch (Exception e) {
LOGGER.severe("Error creating new panel; " + e.getMessage());
}
}
}
}
感謝。我做了一個小的補充。 textArea也放置在scrollPane中。 – Yoav