【发布时间】：2019-04-17 17:40:43
【问题描述】：
名为txtaObservation 的JTextArea 占用了其容器GridBagLayout 的五个水平槽。它的文本应该在到达第五个插槽时换行，在名为lblObservationLimit 的标签下方，但是它的换行太快了，就在第一个插槽中。如何让它包裹在正确的插槽？
JDViewCustomer.java
package test2;
import java.awt.Color;
import java.awt.Font;
import java.awt.GridBagConstraints;
import java.awt.GridBagLayout;
import java.awt.Insets;
import java.util.Objects;
import javax.swing.BoxLayout;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JTextArea;
import javax.swing.border.CompoundBorder;
import javax.swing.border.EmptyBorder;
import javax.swing.border.LineBorder;
public class JDViewCustomer extends javax.swing.JDialog {
private static final long serialVersionUID = 1L;
private JTextArea txtaObservation;
private JPanel panelCustomerData;
private final CustomerData customerData;
private JLabel lblObservationLimit;
public JDViewCustomer(java.awt.Frame parent, boolean modal, CustomerData customerData) {
super(parent, modal);
this.customerData = Objects.requireNonNull(customerData);
getContentPane().setLayout(new BoxLayout(getContentPane(), BoxLayout.Y_AXIS));
layoutCustomerDataSection();
addCustomerData();
initComponents();
}
public void layoutCustomerDataSection() {
panelCustomerData = new JPanel();
panelCustomerData.setBorder(new CompoundBorder(new LineBorder(new Color(0, 0, 0), 1, true), new EmptyBorder(10, 10, 10, 10)));
panelCustomerData.setBackground(Color.WHITE);
getContentPane().add(panelCustomerData);
GridBagLayout gbl_panelCustomerData = new GridBagLayout();
gbl_panelCustomerData.columnWidths = new int[]{58, 199, 38, 102, 27, 138, 0};
gbl_panelCustomerData.rowHeights = new int[]{0, 14, 0};
gbl_panelCustomerData.columnWeights = new double[]{0.0, 0.0, 0.0, 0.0, 0.0, 0.0, Double.MIN_VALUE};
gbl_panelCustomerData.rowWeights = new double[]{0.0, 0.0, Double.MIN_VALUE};
panelCustomerData.setLayout(gbl_panelCustomerData);
lblObservationLimit = new JLabel("Observation limit");
GridBagConstraints gbc_lblObservationLimit = new GridBagConstraints();
gbc_lblObservationLimit.insets = new Insets(0, 0, 5, 0);
gbc_lblObservationLimit.gridx = 5;
gbc_lblObservationLimit.gridy = 0;
panelCustomerData.add(lblObservationLimit, gbc_lblObservationLimit);
txtaObservation = new JTextArea("Observation text");
txtaObservation.setFont(new Font("Tahoma", Font.PLAIN, 11));
txtaObservation.setLineWrap(true);
txtaObservation.setWrapStyleWord(true);
GridBagConstraints gbc_txtaObservation = new GridBagConstraints();
gbc_txtaObservation.gridwidth = 5;
gbc_txtaObservation.anchor = GridBagConstraints.NORTHWEST;
gbc_txtaObservation.gridx = 1;
gbc_txtaObservation.gridy = 1;
panelCustomerData.add(txtaObservation, gbc_txtaObservation);
}
public void addCustomerData() {
txtaObservation.setText(customerData.getObservation());
}
private void initComponents() {
setDefaultCloseOperation(javax.swing.WindowConstants.DISPOSE_ON_CLOSE);
setTitle("View customer");
pack();
setLocationRelativeTo(getParent());
}
}
CustomerData.java
package test2;
public class CustomerData {
private final String observation;
public CustomerData(String observation) {
this.observation = observation;
}
public String getObservation() {
return observation;
}
}
Test2.java
package test2;
import javax.swing.JFrame;
import javax.swing.SwingUtilities;
public class Test2 {
private static void createAndShowGUI() {
JFrame frame = new JFrame("Test");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
CustomerData customerData = new CustomerData("Testing a long observation text that should wrap only when reaching the observation limit.");
new JDViewCustomer(frame, true, customerData).setVisible(true);
frame.pack();
frame.setVisible(true);
}
public static void main(String[] args) {
SwingUtilities.invokeLater(new Runnable() {
public void run() {
createAndShowGUI();
}
});
}
}
【问题讨论】：
-
tente com
gbc_txtaObservation.fill = GridBagConstraints.HORIZONTAL;(e talvez...gridx = 0) []s -
@CarlosHeubeger 谢谢，但您的评论应该是英文的 :)
-
好吧，就三个字...不会有太大的区别，只是想炫耀一点[:-)（别说我你没听懂）
-
@CarlosHeuberger 我明白了，
.fill工作了！把它变成一个答案，我很乐意接受它。
标签： java swing dialog jtextarea gridbaglayout