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我在 JDialog 框中有一个 JTabbedPane，它在 Pane 中包含的所有 JPanels 上使用 GridBagLayout 。在显示的第一个面板上有一个 JTextArea (descTxt)，可以在其中输入电影说明。当您在 JTextArea 中输入大量文本时 看起来一切都很好，直到您单击面板上不是组件的任何位置(空白的灰色空间)，然后所有文本字段和文本 Pane 都会缩小到看起来大小为 0 的大小。
以下是一些要粘贴和测试的示例文本:
During a manned mission to Mars, Astronaut Mark Watney is presumed dead after a fierce storm and left behind by his crew. But Watney has survived and finds himself stranded and alone on the hostile planet. With only meager supplies, he must draw upon his ingenuity, wit and spirit to subsist and find a way to signal to Earth that he is alive.
这是我的代码的可运行示例:
import java.awt.Color;
import java.awt.Dimension;
import java.awt.GridBagConstraints;
import java.awt.GridBagLayout;
import java.awt.Insets;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.io.File;
import java.util.ArrayList;
import java.util.regex.Pattern;
import javax.swing.BorderFactory;
import javax.swing.DefaultComboBoxModel;
import javax.swing.JButton;
import javax.swing.JComboBox;
import javax.swing.JDialog;
import javax.swing.JFileChooser;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JOptionPane;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTabbedPane;
import javax.swing.JTextArea;
import javax.swing.JTextField;
import javax.swing.ScrollPaneConstants;
import javax.swing.filechooser.FileNameExtensionFilter;
/**
*
* @author Chris
*/
public class AdminWindow extends JDialog implements ActionListener {
private JPanel adminPanel1, adminPanel2, adminPanel3;
private JTabbedPane tabPane;
private GridBagConstraints g1, g2, g3;
private JLabel idLbl, showLbl, descLbl, ageLbl, imgLbl, timeLbl, screenLbl,
stanLbl, vipLbl, idLbl1, showLbl1, descLbl1, ageLbl1, imgLbl1, imgName;
private JTextField idTxt, showTxt, imgTxt, timeTxt, stanTxt, vipTxt,
idTxt1, showTxt1, imgTxt1;
private JTextArea descTxt, descTxt1;
private JComboBox ageCb, ageCb1, screenCb, timeCb, showingCb;
private JScrollPane descTxtPane, descTxtPane1;
private ArrayList<String> screenList, timeList, showingList;
private DefaultComboBoxModel screenModel, timeModel, showingModel;
private JButton submit, clear, seatSubmit, seatClear, addBtn, subBtn,
submit1, clear1, imgBtn;
private double stanPrice, vipPrice;
private String stanPriceString, vipPriceString, priceExpression, imgString;
private Pattern p;
private File dest, chosenFile;
public AdminWindow() {
//frame properties
super(new JFrame("Admin Panel"));
setTitle("Admin Panel");
//setSize(Dimensions.getScreenWidth() - 100, Dimensions.getScreenHeight() - 100);
setAlwaysOnTop(true);
setResizable(false);
setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);
setLocationRelativeTo(null);
//regular expression validations
priceExpression = "[0-9]{1,2}[.]{1}[0-9]{2}";
p = Pattern.compile(priceExpression);
//panel dec
tabPane = new JTabbedPane();
adminPanel1 = new JPanel();
adminPanel2 = new JPanel();
adminPanel3 = new JPanel();
g1 = new GridBagConstraints();
g2 = new GridBagConstraints();
g3 = new GridBagConstraints();
//label dec
idLbl = new JLabel("Film ID");
showLbl = new JLabel("Film Name");
descLbl = new JLabel("Film Description");
ageLbl = new JLabel("Age Rating");
imgLbl = new JLabel("Image");
idLbl1 = new JLabel("Film ID");
showLbl1 = new JLabel("Film Name");
descLbl1 = new JLabel("Film Description");
ageLbl1 = new JLabel("Age Rating");
imgLbl1 = new JLabel("Image");
timeLbl = new JLabel("Showing Times");
screenLbl = new JLabel("Screen Number");
stanLbl = new JLabel("Standard Ticket Cost (£)");
vipLbl = new JLabel("VIP Ticket Cost (£)");
imgName = new JLabel("filename.jpg");
//label properties
imgName.setPreferredSize(new Dimension(100, 20));
//txttfield dec
idTxt = new JTextField(4);
showTxt = new JTextField(30);
descTxt = new JTextArea(4, 30);
descTxtPane = new JScrollPane(descTxt, ScrollPaneConstants.VERTICAL_SCROLLBAR_AS_NEEDED, ScrollPaneConstants.HORIZONTAL_SCROLLBAR_NEVER);
imgTxt = new JTextField();
idTxt1 = new JTextField(4);
showTxt1 = new JTextField(30);
descTxt1 = new JTextArea(4, 30);
descTxtPane1 = new JScrollPane(descTxt1, ScrollPaneConstants.VERTICAL_SCROLLBAR_AS_NEEDED, ScrollPaneConstants.HORIZONTAL_SCROLLBAR_NEVER);
imgTxt1 = new JTextField();
timeTxt = new JTextField(4);
stanTxt = new JTextField(4);
vipTxt = new JTextField(4);
//textfield properties
idTxt1.setEditable(false);
descTxt.setWrapStyleWord(true);
descTxt.setLineWrap(true);
//drop-down dec
ageCb = new JComboBox();
ageCb1 = new JComboBox();
screenCb = new JComboBox();
timeCb = new JComboBox();
showingCb = new JComboBox();
//dropdown properties
timeCb.setPreferredSize(new Dimension(60, 23));
//buttons
submit = new JButton("Submit");
clear = new JButton("Clear");
submit1 = new JButton("Submit");
clear1 = new JButton("Clear");
seatSubmit = new JButton("Submit");
seatClear = new JButton("Show Current");
addBtn = new JButton("+");
subBtn = new JButton("-");
imgBtn = new JButton("Browse..");
//button properties
addBtn.setFocusPainted(false);
subBtn.setFocusPainted(false);
addBtn.setMargin(new Insets(0, 5, 0, 5));
subBtn.setMargin(new Insets(0, 5, 0, 5));
//listeners
submit.addActionListener(this);
clear.addActionListener(this);
seatSubmit.addActionListener(this);
seatClear.addActionListener(this);
addBtn.addActionListener(this);
subBtn.addActionListener(this);
imgBtn.addActionListener(this);
//fill price text fields with existing prices
defaultForm();
//add items to jcombobox
ageCb.addItem("U");
ageCb.addItem("12A");
ageCb.addItem("15");
ageCb.addItem("18");
ageCb1.addItem("U");
ageCb1.addItem("12A");
ageCb1.addItem("15");
ageCb1.addItem("18");
//panel properties
adminPanel1.setLayout(new GridBagLayout());
adminPanel2.setLayout(new GridBagLayout());
adminPanel3.setLayout(new GridBagLayout());
adminPanel1.setBorder(BorderFactory.createTitledBorder(BorderFactory.createLineBorder(Color.black), "New Showing"));
adminPanel2.setBorder(BorderFactory.createTitledBorder(BorderFactory.createLineBorder(Color.black), "Seat Prices"));
adminPanel3.setBorder(BorderFactory.createTitledBorder(BorderFactory.createLineBorder(Color.black), "Edit Showing"));
//ading panels to tabbed pane
tabPane.addTab("Add Showings", null, adminPanel1, "Add new showings & showing times");
tabPane.addTab("Seat Prices", null, adminPanel2, "Change seat prices");
tabPane.addTab("Edit Showing", null, adminPanel3, "Edit existing showing");
//-----adding components to pane--------------------------------------!
g1.gridx = 0;
g1.gridy = 0;
g1.insets = new Insets(10, 0, 0, 10);
g1.anchor = GridBagConstraints.LINE_END;
adminPanel1.add(idLbl, g1);
g1.gridx++;
g1.anchor = GridBagConstraints.LINE_START;
adminPanel1.add(idTxt, g1);
g1.gridy++;
g1.gridx--;
g1.anchor = GridBagConstraints.LINE_END;
adminPanel1.add(showLbl, g1);
g1.gridx++;
g1.anchor = GridBagConstraints.LINE_START;
g1.gridwidth = 4;
adminPanel1.add(showTxt, g1);
g1.gridwidth = 1;
g1.gridy++;
g1.gridx--;
g1.anchor = GridBagConstraints.LINE_END;
adminPanel1.add(descLbl, g1);
g1.gridx++;
g1.anchor = GridBagConstraints.LINE_START;
g1.gridwidth = 4;
adminPanel1.add(descTxtPane, g1);
g1.gridwidth = 1;
g1.gridy++;
g1.gridx--;
g1.anchor = GridBagConstraints.LINE_END;
adminPanel1.add(ageLbl, g1);
g1.gridx++;
g1.anchor = GridBagConstraints.LINE_START;
adminPanel1.add(ageCb, g1);
g1.gridy++;
g1.gridx--;
g1.anchor = GridBagConstraints.LINE_END;
adminPanel1.add(imgLbl, g1);
g1.gridx++;
g1.anchor = GridBagConstraints.LINE_START;
g1.gridwidth = 2;
adminPanel1.add(imgBtn, g1);
g1.gridx = 3;
adminPanel1.add(imgName, g1);
g1.gridwidth = 1;
g1.gridy++;
g1.gridx = 0;
g1.anchor = GridBagConstraints.LINE_END;
adminPanel1.add(screenLbl, g1);
g1.gridx++;
g1.anchor = GridBagConstraints.LINE_START;
adminPanel1.add(screenCb, g1);
g1.gridx--;
g1.gridy++;
g1.anchor = GridBagConstraints.LINE_END;
adminPanel1.add(timeLbl, g1);
g1.gridx++;
g1.anchor = GridBagConstraints.LINE_START;
adminPanel1.add(timeTxt, g1);
g1.gridx++;
adminPanel1.add(addBtn, g1);
g1.gridx++;
adminPanel1.add(timeCb, g1);
g1.gridx++;
adminPanel1.add(subBtn, g1);
//buttons
g1.gridy++;
g1.gridx = 0;
g1.insets = new Insets(10, 0, 10, 10); //top, right, bottom, left
g1.anchor = GridBagConstraints.LINE_END;
adminPanel1.add(clear, g1);
g1.gridx++;
g1.anchor = GridBagConstraints.LINE_START;
g1.gridwidth = 4;
adminPanel1.add(submit, g1);
g1.gridwidth = 1;
//------adding components to panel2-----------------------------------!
//left
g2.gridx = 0;
g2.gridy = 0;
g2.insets = new Insets(10, 10, 0, 10);
g2.anchor = GridBagConstraints.LINE_END;
adminPanel2.add(stanLbl, g2);
g2.gridy++;
adminPanel2.add(vipLbl, g2);
g2.gridy++;
adminPanel2.add(seatClear, g2);
//right
g2.gridy = 0;
g2.gridx++;
g2.anchor = GridBagConstraints.LINE_START;
adminPanel2.add(stanTxt, g2);
g2.gridy++;
adminPanel2.add(vipTxt, g2);
g2.gridy++;
adminPanel2.add(seatSubmit, g2);
//-----adminpanel3-----------------------------------------------------
//adding components to panel1
g3.gridx = 1;
g3.gridy = 0;
g3.insets = new Insets(10, 0, 0, 10);
g3.anchor = GridBagConstraints.LINE_START;
g3.gridwidth = 4;
adminPanel3.add(showingCb, g3);
g3.gridwidth = 1;
g3.gridx--;
g3.gridy++;
g3.anchor = GridBagConstraints.LINE_END;
adminPanel3.add(idLbl1, g3);
g3.gridx++;
g3.anchor = GridBagConstraints.LINE_START;
adminPanel3.add(idTxt1, g3);
g3.gridy++;
g3.gridx--;
g3.anchor = GridBagConstraints.LINE_END;
adminPanel3.add(showLbl1, g3);
g3.gridx++;
g3.anchor = GridBagConstraints.LINE_START;
g3.gridwidth = 5;
adminPanel3.add(showTxt1, g3);
g3.gridwidth = 1;
g3.gridy++;
g3.gridx--;
g3.anchor = GridBagConstraints.LINE_END;
adminPanel3.add(descLbl1, g3);
g3.gridx++;
g3.anchor = GridBagConstraints.LINE_START;
g3.gridwidth = 4;
adminPanel3.add(descTxtPane1, g3);
g3.gridwidth = 1;
g3.gridy++;
g3.gridx--;
g3.anchor = GridBagConstraints.LINE_END;
adminPanel3.add(ageLbl1, g3);
g3.gridx++;
g3.anchor = GridBagConstraints.LINE_START;
adminPanel3.add(ageCb1, g3);
g3.gridy++;
g3.gridx--;
//buttons
g3.gridy++;
g3.gridx = 0;
g3.insets = new Insets(10, 0, 10, 10); //top, right, bottom, left
g3.anchor = GridBagConstraints.LINE_END;
adminPanel3.add(clear1, g3);
g3.gridx++;
g3.anchor = GridBagConstraints.LINE_START;
g3.gridwidth = 4;
adminPanel3.add(submit1, g3);
g3.gridwidth = 1;
//adding tabbed pane to frame
this.add(tabPane);
this.pack();
//visibility
setVisible(true);
tabPane.setVisible(true);
//actionlisteners
}
public static void main(String[] args) {
AdminWindow test = new AdminWindow();
}
@Override
public void actionPerformed(ActionEvent e) {
if (e.getSource() == imgBtn) {
//--JFileChooser, ugly but better to use--
String userDir = System.getProperty("user.home");
JFileChooser chooser = new JFileChooser(userDir+"/Desktop");
int choice = chooser.showDialog(this, "Choose");
if (choice != JFileChooser.APPROVE_OPTION) {
return;
}
FileNameExtensionFilter filter = new FileNameExtensionFilter("Image Files", "jpg", "png", "gif", "jpeg");
chooser.setAcceptAllFileFilterUsed(false);
chooser.addChoosableFileFilter(filter);
chosenFile = chooser.getSelectedFile();
imgName.setText(chosenFile.getName());
dest = new File(System.getProperty("user.dir") + "/src/iegroup/resources", chosenFile.getName());
imgString = "resources/" + chosenFile.getName();
System.out.println(dest.toPath());
}
if (e.getSource() == submit) {
if (e.getSource() == clear ){
}
if (e.getSource() == seatSubmit) {
}
}
if (e.getSource() == seatClear) {
defaultForm();
}
if (e.getSource() == addBtn) {
timeModel.addElement(timeTxt.getText());
timeList.add(timeTxt.getText());
}
if (e.getSource() == subBtn) {
timeModel.removeElement(timeCb.getSelectedItem());
timeList.remove(timeCb.getSelectedItem());
}
}
private void defaultForm() {
stanPriceString = String.format("%.2f", stanPrice);
vipPriceString = String.format("%.2f", vipPrice);
stanTxt.setText(stanPriceString);
vipTxt.setText(vipPriceString);
}
public void showValidationPrompt(String message) {
JFrame validFrame = new JFrame();
validFrame.setAlwaysOnTop(true);
JOptionPane.showMessageDialog(validFrame, message, "Invalid input", JOptionPane.CLOSED_OPTION);
}
public void showSuccessPrompt(String message) {
JFrame errorFrame = new JFrame();
errorFrame.setAlwaysOnTop(true);
JOptionPane.showMessageDialog(errorFrame, message, "Success", JOptionPane.CLOSED_OPTION);
}
}
请帮忙。这非常令人困惑，我似乎无法在任何地方找到解决方案。
最佳答案
所以，问题似乎是 setResizing(false) 和 ScrollPaneConstants.VERTICAL_SCROLLBAR_AS_NEEDED 的组合(好吧，我只是讨厌不可调整大小的窗口)。
发生的情况是，当您填充JTextArea时，它会将JScrollPane“添加”到已经“打包”的窗口中，因此组件的大小发生了变化，然后当容器被重新验证，不再有足够的空间来将所有字段按其首选大小打包，因此它们的大小被调整为最小大小，通常为 0x0 或足够接近。
您可以采取一些措施来帮助事情顺利进行。您可以使用 GridBagConstraints#fill 并使用 GridBagConstraints.HORIZONTAL 作为文本字段，使用 GridBagConstraints.BOTH 作为文本区域，这将执行以下操作无论单元格空间何时小于组件的首选大小，都允许字段“填充”并占据列/行的可用空间。
您可能还会发现将 GridBagConstraints#weightx/y 改为 1 会有帮助。
如果您遇到真正的麻烦，您可以简单地在 JScrollPane 中使用 ScrollPaneConstants.VERTICAL_SCROLLBAR_ALWAYS，虽然不漂亮，但会添加到 JScrollBar 中 窗口打包时 JScrollPane 的大小
已更新
所以，基本上，我最终对 JScrollPane 和 JTextArea 使用了 sfill 和 weightx/y 的组合
g1.fill = GridBagConstraints.BOTH;
g1.weightx = 1;
g1.weighty = 1;
adminPanel1.add(descTxtPane, g1);
g1.fill = GridBagConstraints.NONE;
g1.weightx = 0;
g1.weighty = 0;
对于JTextField，我刚刚使用了fill，它似乎已经稳定了事情......
g1.fill = GridBagConstraints.HORIZONTAL;
adminPanel1.add(idTxt, g1);
g1.fill = GridBagConstraints.NONE;
这导致了类似...
import java.awt.Color;
import java.awt.Dimension;
import java.awt.GridBagConstraints;
import java.awt.GridBagLayout;
import java.awt.Insets;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.io.File;
import java.util.ArrayList;
import java.util.regex.Pattern;
import javax.swing.BorderFactory;
import javax.swing.DefaultComboBoxModel;
import javax.swing.JButton;
import javax.swing.JComboBox;
import javax.swing.JDialog;
import javax.swing.JFileChooser;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JOptionPane;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTabbedPane;
import javax.swing.JTextArea;
import javax.swing.JTextField;
import javax.swing.ScrollPaneConstants;
import javax.swing.filechooser.FileNameExtensionFilter;
public class AdminWindow extends JDialog implements ActionListener {
private JPanel adminPanel1, adminPanel2, adminPanel3;
private JTabbedPane tabPane;
private GridBagConstraints g1, g2, g3;
private JLabel idLbl, showLbl, descLbl, ageLbl, imgLbl, timeLbl, screenLbl,
stanLbl, vipLbl, idLbl1, showLbl1, descLbl1, ageLbl1, imgLbl1, imgName;
private JTextField idTxt, showTxt, imgTxt, timeTxt, stanTxt, vipTxt,
idTxt1, showTxt1, imgTxt1;
private JTextArea descTxt, descTxt1;
private JComboBox ageCb, ageCb1, screenCb, timeCb, showingCb;
private JScrollPane descTxtPane, descTxtPane1;
private ArrayList<String> screenList, timeList, showingList;
private DefaultComboBoxModel screenModel, timeModel, showingModel;
private JButton submit, clear, seatSubmit, seatClear, addBtn, subBtn,
submit1, clear1, imgBtn;
private double stanPrice, vipPrice;
private String stanPriceString, vipPriceString, priceExpression, imgString;
private Pattern p;
private File dest, chosenFile;
public AdminWindow() {
//frame properties
setTitle("Admin Panel");
//setSize(Dimensions.getScreenWidth() - 100, Dimensions.getScreenHeight() - 100);
setAlwaysOnTop(true);
// setResizable(false);
setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);
setLocationRelativeTo(null);
//regular expression validations
priceExpression = "[0-9]{1,2}[.]{1}[0-9]{2}";
p = Pattern.compile(priceExpression);
//panel dec
tabPane = new JTabbedPane();
adminPanel1 = new JPanel();
adminPanel2 = new JPanel();
adminPanel3 = new JPanel();
g1 = new GridBagConstraints();
g2 = new GridBagConstraints();
g3 = new GridBagConstraints();
//label dec
idLbl = new JLabel("Film ID");
showLbl = new JLabel("Film Name");
descLbl = new JLabel("Film Description");
ageLbl = new JLabel("Age Rating");
imgLbl = new JLabel("Image");
idLbl1 = new JLabel("Film ID");
showLbl1 = new JLabel("Film Name");
descLbl1 = new JLabel("Film Description");
ageLbl1 = new JLabel("Age Rating");
imgLbl1 = new JLabel("Image");
timeLbl = new JLabel("Showing Times");
screenLbl = new JLabel("Screen Number");
stanLbl = new JLabel("Standard Ticket Cost (£)");
vipLbl = new JLabel("VIP Ticket Cost (£)");
imgName = new JLabel("filename.jpg");
//label properties
// imgName.setPreferredSize(new Dimension(100, 20));
//txttfield dec
idTxt = new JTextField(4);
showTxt = new JTextField(30);
descTxt = new JTextArea(4, 30);
descTxtPane = new JScrollPane(descTxt, ScrollPaneConstants.VERTICAL_SCROLLBAR_AS_NEEDED, ScrollPaneConstants.HORIZONTAL_SCROLLBAR_NEVER);
imgTxt = new JTextField();
idTxt1 = new JTextField(4);
showTxt1 = new JTextField(30);
descTxt1 = new JTextArea(4, 30);
descTxtPane1 = new JScrollPane(descTxt1, ScrollPaneConstants.VERTICAL_SCROLLBAR_AS_NEEDED, ScrollPaneConstants.HORIZONTAL_SCROLLBAR_NEVER);
imgTxt1 = new JTextField();
timeTxt = new JTextField(4);
stanTxt = new JTextField(4);
vipTxt = new JTextField(4);
//textfield properties
idTxt1.setEditable(false);
descTxt.setWrapStyleWord(true);
descTxt.setLineWrap(true);
//drop-down dec
ageCb = new JComboBox();
ageCb1 = new JComboBox();
screenCb = new JComboBox();
timeCb = new JComboBox();
showingCb = new JComboBox();
//dropdown properties
// timeCb.setPreferredSize(new Dimension(60, 23));
//buttons
submit = new JButton("Submit");
clear = new JButton("Clear");
submit1 = new JButton("Submit");
clear1 = new JButton("Clear");
seatSubmit = new JButton("Submit");
seatClear = new JButton("Show Current");
addBtn = new JButton("+");
subBtn = new JButton("-");
imgBtn = new JButton("Browse..");
//button properties
addBtn.setFocusPainted(false);
subBtn.setFocusPainted(false);
addBtn.setMargin(new Insets(0, 5, 0, 5));
subBtn.setMargin(new Insets(0, 5, 0, 5));
//listeners
submit.addActionListener(this);
clear.addActionListener(this);
seatSubmit.addActionListener(this);
seatClear.addActionListener(this);
addBtn.addActionListener(this);
subBtn.addActionListener(this);
imgBtn.addActionListener(this);
//fill price text fields with existing prices
defaultForm();
//add items to jcombobox
ageCb.addItem("U");
ageCb.addItem("12A");
ageCb.addItem("15");
ageCb.addItem("18");
ageCb1.addItem("U");
ageCb1.addItem("12A");
ageCb1.addItem("15");
ageCb1.addItem("18");
//panel properties
adminPanel1.setLayout(new GridBagLayout());
adminPanel2.setLayout(new GridBagLayout());
adminPanel3.setLayout(new GridBagLayout());
adminPanel1.setBorder(BorderFactory.createTitledBorder(BorderFactory.createLineBorder(Color.black), "New Showing"));
adminPanel2.setBorder(BorderFactory.createTitledBorder(BorderFactory.createLineBorder(Color.black), "Seat Prices"));
adminPanel3.setBorder(BorderFactory.createTitledBorder(BorderFactory.createLineBorder(Color.black), "Edit Showing"));
//ading panels to tabbed pane
tabPane.addTab("Add Showings", null, adminPanel1, "Add new showings & showing times");
tabPane.addTab("Seat Prices", null, adminPanel2, "Change seat prices");
tabPane.addTab("Edit Showing", null, adminPanel3, "Edit existing showing");
//-----adding components to pane--------------------------------------!
g1.gridx = 0;
g1.gridy = 0;
g1.insets = new Insets(10, 0, 0, 10);
g1.anchor = GridBagConstraints.LINE_END;
adminPanel1.add(idLbl, g1);
g1.gridx++;
g1.anchor = GridBagConstraints.LINE_START;
g1.fill = GridBagConstraints.HORIZONTAL;
adminPanel1.add(idTxt, g1);
g1.fill = GridBagConstraints.NONE;
g1.gridy++;
g1.gridx--;
g1.anchor = GridBagConstraints.LINE_END;
adminPanel1.add(showLbl, g1);
g1.gridx++;
g1.anchor = GridBagConstraints.LINE_START;
g1.gridwidth = 4;
g1.fill = GridBagConstraints.HORIZONTAL;
adminPanel1.add(showTxt, g1);
g1.fill = GridBagConstraints.NONE;
g1.gridwidth = 1;
g1.gridy++;
g1.gridx--;
g1.anchor = GridBagConstraints.LINE_END;
adminPanel1.add(descLbl, g1);
g1.gridx++;
g1.anchor = GridBagConstraints.LINE_START;
g1.gridwidth = 4;
g1.fill = GridBagConstraints.BOTH;
g1.weightx = 1;
g1.weighty = 1;
adminPanel1.add(descTxtPane, g1);
g1.fill = GridBagConstraints.NONE;
g1.weightx = 0;
g1.weighty = 0;
g1.gridwidth = 1;
g1.gridy++;
g1.gridx--;
g1.anchor = GridBagConstraints.LINE_END;
adminPanel1.add(ageLbl, g1);
g1.gridx++;
g1.anchor = GridBagConstraints.LINE_START;
adminPanel1.add(ageCb, g1);
g1.gridy++;
g1.gridx--;
g1.anchor = GridBagConstraints.LINE_END;
adminPanel1.add(imgLbl, g1);
g1.gridx++;
g1.anchor = GridBagConstraints.LINE_START;
g1.gridwidth = 2;
adminPanel1.add(imgBtn, g1);
g1.gridx = 3;
adminPanel1.add(imgName, g1);
g1.gridwidth = 1;
g1.gridy++;
g1.gridx = 0;
g1.anchor = GridBagConstraints.LINE_END;
adminPanel1.add(screenLbl, g1);
g1.gridx++;
g1.anchor = GridBagConstraints.LINE_START;
adminPanel1.add(screenCb, g1);
g1.gridx--;
g1.gridy++;
g1.anchor = GridBagConstraints.LINE_END;
adminPanel1.add(timeLbl, g1);
g1.gridx++;
g1.anchor = GridBagConstraints.LINE_START;
g1.fill = GridBagConstraints.HORIZONTAL;
adminPanel1.add(timeTxt, g1);
g1.fill = GridBagConstraints.NONE;
g1.gridx++;
adminPanel1.add(addBtn, g1);
g1.gridx++;
adminPanel1.add(timeCb, g1);
g1.gridx++;
adminPanel1.add(subBtn, g1);
//buttons
g1.gridy++;
g1.gridx = 0;
g1.insets = new Insets(10, 0, 10, 10); //top, right, bottom, left
g1.anchor = GridBagConstraints.LINE_END;
adminPanel1.add(clear, g1);
g1.gridx++;
g1.anchor = GridBagConstraints.LINE_START;
g1.gridwidth = 4;
adminPanel1.add(submit, g1);
g1.gridwidth = 1;
//------adding components to panel2-----------------------------------!
//left
g2.gridx = 0;
g2.gridy = 0;
g2.insets = new Insets(10, 10, 0, 10);
g2.anchor = GridBagConstraints.LINE_END;
adminPanel2.add(stanLbl, g2);
g2.gridy++;
adminPanel2.add(vipLbl, g2);
g2.gridy++;
adminPanel2.add(seatClear, g2);
//right
g2.gridy = 0;
g2.gridx++;
g2.anchor = GridBagConstraints.LINE_START;
g2.fill = GridBagConstraints.HORIZONTAL;
adminPanel2.add(stanTxt, g2);
g2.fill = GridBagConstraints.NONE;
g2.gridy++;
g2.fill = GridBagConstraints.HORIZONTAL;
adminPanel2.add(vipTxt, g2);
g2.fill = GridBagConstraints.NONE;
g2.gridy++;
adminPanel2.add(seatSubmit, g2);
//-----adminpanel3-----------------------------------------------------
//adding components to panel1
g3.gridx = 1;
g3.gridy = 0;
g3.insets = new Insets(10, 0, 0, 10);
g3.anchor = GridBagConstraints.LINE_START;
g3.gridwidth = 4;
adminPanel3.add(showingCb, g3);
g3.gridwidth = 1;
g3.gridx--;
g3.gridy++;
g3.anchor = GridBagConstraints.LINE_END;
adminPanel3.add(idLbl1, g3);
g3.gridx++;
g3.anchor = GridBagConstraints.LINE_START;
g3.fill = GridBagConstraints.HORIZONTAL;
adminPanel3.add(idTxt1, g3);
g3.fill = GridBagConstraints.NONE;
g3.gridy++;
g3.gridx--;
g3.anchor = GridBagConstraints.LINE_END;
adminPanel3.add(showLbl1, g3);
g3.gridx++;
g3.anchor = GridBagConstraints.LINE_START;
g3.gridwidth = 5;
g3.fill = GridBagConstraints.HORIZONTAL;
adminPanel3.add(showTxt1, g3);
g3.fill = GridBagConstraints.NONE;
g3.gridwidth = 1;
g3.gridy++;
g3.gridx--;
g3.anchor = GridBagConstraints.LINE_END;
adminPanel3.add(descLbl1, g3);
g3.gridx++;
g3.anchor = GridBagConstraints.LINE_START;
g3.gridwidth = 4;
g3.fill = GridBagConstraints.BOTH;
g3.weightx = 1;
g3.weighty = 1;
adminPanel3.add(descTxtPane1, g3);
g3.fill = GridBagConstraints.NONE;
g3.weightx = 0;
g3.weighty = 0;
g3.gridwidth = 1;
g3.gridy++;
g3.gridx--;
g3.anchor = GridBagConstraints.LINE_END;
adminPanel3.add(ageLbl1, g3);
g3.gridx++;
g3.anchor = GridBagConstraints.LINE_START;
adminPanel3.add(ageCb1, g3);
g3.gridy++;
g3.gridx--;
//buttons
g3.gridy++;
g3.gridx = 0;
g3.insets = new Insets(10, 0, 10, 10); //top, right, bottom, left
g3.anchor = GridBagConstraints.LINE_END;
adminPanel3.add(clear1, g3);
g3.gridx++;
g3.anchor = GridBagConstraints.LINE_START;
g3.gridwidth = 4;
adminPanel3.add(submit1, g3);
g3.gridwidth = 1;
//adding tabbed pane to frame
this.add(tabPane);
this.pack();
//visibility
setVisible(true);
tabPane.setVisible(true);
//actionlisteners
}
public static void main(String[] args) {
AdminWindow test = new AdminWindow();
}
@Override
public void actionPerformed(ActionEvent e) {
if (e.getSource() == imgBtn) {
//--JFileChooser, ugly but better to use--
String userDir = System.getProperty("user.home");
JFileChooser chooser = new JFileChooser(userDir + "/Desktop");
int choice = chooser.showDialog(this, "Choose");
if (choice != JFileChooser.APPROVE_OPTION) {
return;
}
FileNameExtensionFilter filter = new FileNameExtensionFilter("Image Files", "jpg", "png", "gif", "jpeg");
chooser.setAcceptAllFileFilterUsed(false);
chooser.addChoosableFileFilter(filter);
chosenFile = chooser.getSelectedFile();
imgName.setText(chosenFile.getName());
dest = new File(System.getProperty("user.dir") + "/src/iegroup/resources", chosenFile.getName());
imgString = "resources/" + chosenFile.getName();
System.out.println(dest.toPath());
}
if (e.getSource() == submit) {
if (e.getSource() == clear) {
}
if (e.getSource() == seatSubmit) {
}
}
if (e.getSource() == seatClear) {
defaultForm();
}
if (e.getSource() == addBtn) {
timeModel.addElement(timeTxt.getText());
timeList.add(timeTxt.getText());
}
if (e.getSource() == subBtn) {
timeModel.removeElement(timeCb.getSelectedItem());
timeList.remove(timeCb.getSelectedItem());
}
}
private void defaultForm() {
stanPriceString = String.format("%.2f", stanPrice);
vipPriceString = String.format("%.2f", vipPrice);
stanTxt.setText(stanPriceString);
vipTxt.setText(vipPriceString);
}
public void showValidationPrompt(String message) {
JFrame validFrame = new JFrame();
validFrame.setAlwaysOnTop(true);
JOptionPane.showMessageDialog(validFrame, message, "Invalid input", JOptionPane.CLOSED_OPTION);
}
public void showSuccessPrompt(String message) {
JFrame errorFrame = new JFrame();
errorFrame.setAlwaysOnTop(true);
JOptionPane.showMessageDialog(errorFrame, message, "Success", JOptionPane.CLOSED_OPTION);
}
}
关于java - 当向 JTextArea 输入大量文本时，JTextFields 和 JTextArea 会缩小，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/34833940/
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