JavaGUI-JTextArea扩展但不收缩
主要问题：在带有JPanel的JScrollPane中，包含一个JTextArea，如果GUI被扩展，文本将自动换行，但当GUI被收缩时，文本不会自动换行。见下面的例子 好的，我正在为我目前正在开发的一个应用程序构建GUI，我有点问题。 说明：我的GUI结构如下所示： 这就是它看起来的样子。 展开后，panelWithText内的JTextArea会展开文本并调整其大小： 但问题是，当您将GUI变小时会发生什么。问题是，我希望文本像以前一样向后扭曲。我对JScrollPane和panelWithText都实现了一个ComponentListener，进行了一些实验，发现ComponentResistized是在展开时为panelWithText调用的，而不是收缩时为panelWithText调用的。有没有办法在panelWithText组件中实现文本向后扭曲的行为？ PS：显然，如果我用常规JPanel切换JScrollPane，它就会工作。但我不能那样做！我有很多带有文本的面板要显示给用户。 对不起，这是我正在使用的代码。 JFrameExt.java panelWithText.javaJavaGUI-JTextArea扩展但不收缩,java,swing,jpanel,jscrollpane,Java,Swing,Jpanel,Jscrollpane,主要问题：在带有JPanel的JScrollPane中，包含一个JTextArea，如果GUI被扩展，文本将自动换行，但当GUI被收缩时，文本不会自动换行。见下面的例子 好的，我正在为我目前正在开发的一个应用程序构建GUI，我有点问题。 说明：我的GUI结构如下所示： 这就是它看起来的样子。 展开后，panelWithText内的JTextArea会展开文本并调整其大小： 但问题是，当您将GUI变小时会发生什么。问题是，我希望文本像以前一样向后扭曲。我对JScrollPane和panelW
在玩了一会儿之后，我想到了这个
public class Test {
public static void main(String[] args) {
EventQueue.invokeLater(new Runnable() {
public void run() {
try {
JFrameExt frame = new JFrameExt();
frame.setVisible(true);
} catch (Exception e) {
e.printStackTrace();
}
}
});
}
public static class ScrollablePane extends JPanel implements Scrollable {
@Override
public Dimension getPreferredScrollableViewportSize() {
return new Dimension(100, 100);
}
@Override
public int getScrollableUnitIncrement(Rectangle visibleRect, int orientation, int direction) {
return 64;
}
@Override
public int getScrollableBlockIncrement(Rectangle visibleRect, int orientation, int direction) {
return 128;
}
@Override
public boolean getScrollableTracksViewportWidth() {
return true;
}
@Override
public boolean getScrollableTracksViewportHeight() {
return false;
}
}
public static class JFrameExt extends JFrame {
private JPanel contentPane;
/**
* Create the frame.
*/
public JFrameExt() {
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
setBounds(100, 100, 246, 164);
contentPane = new JPanel();
contentPane.setBorder(null);
contentPane.setLayout(new BorderLayout(0, 0));
setContentPane(contentPane);
JScrollPane scrollPane = new JScrollPane();
scrollPane.setViewportBorder(null);
scrollPane.setHorizontalScrollBarPolicy(ScrollPaneConstants.HORIZONTAL_SCROLLBAR_NEVER);
contentPane.add(scrollPane, BorderLayout.CENTER);
JPanel panel = new ScrollablePane();
scrollPane.setViewportView(panel);
GridBagLayout gbl_panel = new GridBagLayout();
// gbl_panel.columnWidths = new int[]{0, 0};
// gbl_panel.rowHeights = new int[]{0, 0, 0, 0, 0, 0, 0, 0};
// gbl_panel.columnWeights = new double[]{1.0, Double.MIN_VALUE};
// gbl_panel.rowWeights = new double[]{0.0, 1.0, 1.0, 1.0, 1.0, 1.0, 1.0, Double.MIN_VALUE};
panel.setLayout(gbl_panel);
panelWithText panelWithText_ = new panelWithText();
GridBagConstraints gbc_panelWithText_ = new GridBagConstraints();
gbc_panelWithText_.anchor = GridBagConstraints.NORTH;
gbc_panelWithText_.insets = new Insets(0, 0, 5, 0);
gbc_panelWithText_.fill = GridBagConstraints.HORIZONTAL;
gbc_panelWithText_.gridx = 0;
gbc_panelWithText_.gridy = 0;
gbc_panelWithText_.weightx = 1;
panel.add(panelWithText_, gbc_panelWithText_);
// panelWithText panelWithText__1 = new panelWithText();
// GridBagConstraints gbc_panelWithText__1 = new GridBagConstraints();
// gbc_panelWithText__1.insets = new Insets(0, 0, 5, 0);
// gbc_panelWithText__1.anchor = GridBagConstraints.NORTH;
//// gbc_panelWithText__1.fill = GridBagConstraints.HORIZONTAL;
// gbc_panelWithText__1.gridx = 0;
// gbc_panelWithText__1.gridy = 1;
// panel.add(panelWithText__1, gbc_panelWithText__1);
//
// panelWithText panelWithText__2 = new panelWithText();
// GridBagConstraints gbc_panelWithText__2 = new GridBagConstraints();
// gbc_panelWithText__2.insets = new Insets(0, 0, 5, 0);
//// gbc_panelWithText__2.fill = GridBagConstraints.BOTH;
// gbc_panelWithText__2.gridx = 0;
// gbc_panelWithText__2.gridy = 2;
// panel.add(panelWithText__2, gbc_panelWithText__2);
//
// panelWithText panelWithText__3 = new panelWithText();
// GridBagConstraints gbc_panelWithText__3 = new GridBagConstraints();
// gbc_panelWithText__3.insets = new Insets(0, 0, 5, 0);
//// gbc_panelWithText__3.fill = GridBagConstraints.BOTH;
// gbc_panelWithText__3.gridx = 0;
// gbc_panelWithText__3.gridy = 3;
// panel.add(panelWithText__3, gbc_panelWithText__3);
//
// panelWithText panelWithText__4 = new panelWithText();
// GridBagConstraints gbc_panelWithText__4 = new GridBagConstraints();
// gbc_panelWithText__4.insets = new Insets(0, 0, 5, 0);
//// gbc_panelWithText__4.fill = GridBagConstraints.BOTH;
// gbc_panelWithText__4.gridx = 0;
// gbc_panelWithText__4.gridy = 4;
// panel.add(panelWithText__4, gbc_panelWithText__4);
//
// panelWithText panelWithText__5 = new panelWithText();
// GridBagConstraints gbc_panelWithText__5 = new GridBagConstraints();
// gbc_panelWithText__5.insets = new Insets(0, 0, 5, 0);
//// gbc_panelWithText__5.fill = GridBagConstraints.BOTH;
// gbc_panelWithText__5.gridx = 0;
// gbc_panelWithText__5.gridy = 5;
// panel.add(panelWithText__5, gbc_panelWithText__5);
//
// panelWithText panelWithText__6 = new panelWithText();
// GridBagConstraints gbc_panelWithText__6 = new GridBagConstraints();
//// gbc_panelWithText__6.fill = GridBagConstraints.BOTH;
// gbc_panelWithText__6.gridx = 0;
// gbc_panelWithText__6.gridy = 6;
// panel.add(panelWithText__6, gbc_panelWithText__6);
setSize(300, 100);
}
}
public static class panelWithText extends JPanel {
/**
* Create the panel.
*/
public void me_resized(Dimension d) {
System.out.println("CALLED..");
super.setPreferredSize(d);
}
public panelWithText() {
setBackground(Color.DARK_GRAY);
setForeground(Color.WHITE);
setLayout(new BorderLayout(0, 0));
JTextArea txtrIveBeenReading = new JTextArea();
txtrIveBeenReading.setEditable(false);
txtrIveBeenReading.setColumns(28);
txtrIveBeenReading.setFont(new Font("Tahoma", Font.PLAIN, 10));
txtrIveBeenReading.setLineWrap(true);
txtrIveBeenReading.setWrapStyleWord(true);
txtrIveBeenReading.setText("\n A bunch of really important text here... A bunch of really important text here... A bunch of really important text here... A bunch of really important text here...\n");
txtrIveBeenReading.setForeground(Color.WHITE);
txtrIveBeenReading.setBackground(Color.DARK_GRAY);
add(txtrIveBeenReading, BorderLayout.CENTER);
}
}
}
作为旁注，您可以使用GridBagConstraints的单个副本，当您将每个新组件添加到容器中时，GridBagLayout将生成它自己的副本。当您想要在组件之间共享GridBagConstraints的属性时，这是非常强大的 玩了一会儿之后，我想到了这个
public class Test {
public static void main(String[] args) {
EventQueue.invokeLater(new Runnable() {
public void run() {
try {
JFrameExt frame = new JFrameExt();
frame.setVisible(true);
} catch (Exception e) {
e.printStackTrace();
}
}
});
}
public static class ScrollablePane extends JPanel implements Scrollable {
@Override
public Dimension getPreferredScrollableViewportSize() {
return new Dimension(100, 100);
}
@Override
public int getScrollableUnitIncrement(Rectangle visibleRect, int orientation, int direction) {
return 64;
}
@Override
public int getScrollableBlockIncrement(Rectangle visibleRect, int orientation, int direction) {
return 128;
}
@Override
public boolean getScrollableTracksViewportWidth() {
return true;
}
@Override
public boolean getScrollableTracksViewportHeight() {
return false;
}
}
public static class JFrameExt extends JFrame {
private JPanel contentPane;
/**
* Create the frame.
*/
public JFrameExt() {
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
setBounds(100, 100, 246, 164);
contentPane = new JPanel();
contentPane.setBorder(null);
contentPane.setLayout(new BorderLayout(0, 0));
setContentPane(contentPane);
JScrollPane scrollPane = new JScrollPane();
scrollPane.setViewportBorder(null);
scrollPane.setHorizontalScrollBarPolicy(ScrollPaneConstants.HORIZONTAL_SCROLLBAR_NEVER);
contentPane.add(scrollPane, BorderLayout.CENTER);
JPanel panel = new ScrollablePane();
scrollPane.setViewportView(panel);
GridBagLayout gbl_panel = new GridBagLayout();
// gbl_panel.columnWidths = new int[]{0, 0};
// gbl_panel.rowHeights = new int[]{0, 0, 0, 0, 0, 0, 0, 0};
// gbl_panel.columnWeights = new double[]{1.0, Double.MIN_VALUE};
// gbl_panel.rowWeights = new double[]{0.0, 1.0, 1.0, 1.0, 1.0, 1.0, 1.0, Double.MIN_VALUE};
panel.setLayout(gbl_panel);
panelWithText panelWithText_ = new panelWithText();
GridBagConstraints gbc_panelWithText_ = new GridBagConstraints();
gbc_panelWithText_.anchor = GridBagConstraints.NORTH;
gbc_panelWithText_.insets = new Insets(0, 0, 5, 0);
gbc_panelWithText_.fill = GridBagConstraints.HORIZONTAL;
gbc_panelWithText_.gridx = 0;
gbc_panelWithText_.gridy = 0;
gbc_panelWithText_.weightx = 1;
panel.add(panelWithText_, gbc_panelWithText_);
// panelWithText panelWithText__1 = new panelWithText();
// GridBagConstraints gbc_panelWithText__1 = new GridBagConstraints();
// gbc_panelWithText__1.insets = new Insets(0, 0, 5, 0);
// gbc_panelWithText__1.anchor = GridBagConstraints.NORTH;
//// gbc_panelWithText__1.fill = GridBagConstraints.HORIZONTAL;
// gbc_panelWithText__1.gridx = 0;
// gbc_panelWithText__1.gridy = 1;
// panel.add(panelWithText__1, gbc_panelWithText__1);
//
// panelWithText panelWithText__2 = new panelWithText();
// GridBagConstraints gbc_panelWithText__2 = new GridBagConstraints();
// gbc_panelWithText__2.insets = new Insets(0, 0, 5, 0);
//// gbc_panelWithText__2.fill = GridBagConstraints.BOTH;
// gbc_panelWithText__2.gridx = 0;
// gbc_panelWithText__2.gridy = 2;
// panel.add(panelWithText__2, gbc_panelWithText__2);
//
// panelWithText panelWithText__3 = new panelWithText();
// GridBagConstraints gbc_panelWithText__3 = new GridBagConstraints();
// gbc_panelWithText__3.insets = new Insets(0, 0, 5, 0);
//// gbc_panelWithText__3.fill = GridBagConstraints.BOTH;
// gbc_panelWithText__3.gridx = 0;
// gbc_panelWithText__3.gridy = 3;
// panel.add(panelWithText__3, gbc_panelWithText__3);
//
// panelWithText panelWithText__4 = new panelWithText();
// GridBagConstraints gbc_panelWithText__4 = new GridBagConstraints();
// gbc_panelWithText__4.insets = new Insets(0, 0, 5, 0);
//// gbc_panelWithText__4.fill = GridBagConstraints.BOTH;
// gbc_panelWithText__4.gridx = 0;
// gbc_panelWithText__4.gridy = 4;
// panel.add(panelWithText__4, gbc_panelWithText__4);
//
// panelWithText panelWithText__5 = new panelWithText();
// GridBagConstraints gbc_panelWithText__5 = new GridBagConstraints();
// gbc_panelWithText__5.insets = new Insets(0, 0, 5, 0);
//// gbc_panelWithText__5.fill = GridBagConstraints.BOTH;
// gbc_panelWithText__5.gridx = 0;
// gbc_panelWithText__5.gridy = 5;
// panel.add(panelWithText__5, gbc_panelWithText__5);
//
// panelWithText panelWithText__6 = new panelWithText();
// GridBagConstraints gbc_panelWithText__6 = new GridBagConstraints();
//// gbc_panelWithText__6.fill = GridBagConstraints.BOTH;
// gbc_panelWithText__6.gridx = 0;
// gbc_panelWithText__6.gridy = 6;
// panel.add(panelWithText__6, gbc_panelWithText__6);
setSize(300, 100);
}
}
public static class panelWithText extends JPanel {
/**
* Create the panel.
*/
public void me_resized(Dimension d) {
System.out.println("CALLED..");
super.setPreferredSize(d);
}
public panelWithText() {
setBackground(Color.DARK_GRAY);
setForeground(Color.WHITE);
setLayout(new BorderLayout(0, 0));
JTextArea txtrIveBeenReading = new JTextArea();
txtrIveBeenReading.setEditable(false);
txtrIveBeenReading.setColumns(28);
txtrIveBeenReading.setFont(new Font("Tahoma", Font.PLAIN, 10));
txtrIveBeenReading.setLineWrap(true);
txtrIveBeenReading.setWrapStyleWord(true);
txtrIveBeenReading.setText("\n A bunch of really important text here... A bunch of really important text here... A bunch of really important text here... A bunch of really important text here...\n");
txtrIveBeenReading.setForeground(Color.WHITE);
txtrIveBeenReading.setBackground(Color.DARK_GRAY);
add(txtrIveBeenReading, BorderLayout.CENTER);
}
}
}
作为旁注，您可以使用GridBagConstraints的单个副本，当您将每个新组件添加到容器中时，GridBagLayout将生成它自己的副本。当您想要在组件之间共享GridBagConstraints的属性时，这是非常强大的 为了更快地获得更好的帮助，请发布一个。如果确实必须这样做，请将DocumentListener添加到JTextArea，并在发生更改时，使父容器无效，强制其放弃布局。您可以通过使其无效来扩展您的意思吗？你还有什么建议吗？我看到了一个使用FlowLayout的解决方案，但扩展了它，使其在大小更改时垂直扩展。似乎编码太多了，我真的必须很快完成此应用。@user1000232抱歉，误解了问题，认为您正在编辑文本：p为了更快地获得帮助，请发布一个。如果确实必须这样做，请将DocumentListener添加到JTextArea，并在更改时使父容器无效，强迫它放弃它的布局，你能进一步说明你所说的使它失效的意思吗？你还有什么建议吗？我看到了一个使用FlowLayout的解决方案，但扩展了它，使其在大小更改时垂直扩展。似乎编码太多了，我真的必须尽快完成这个应用程序。@user1000232抱歉，误解了问题，以为你在编辑文本：PFunny我找到了相同的解决方案。除了我决定用盒子布局…我不想要像盒子一样重的东西grid@user1000232你应该看看SwingLabs SwingX图书馆的垂直布局。我发现了同样的解决方案。除了我决定用盒子布局…我不想要像盒子一样重的东西grid@user1000232您应该看看SwingLabs SwingX库中的垂直布局
public class Test {
public static void main(String[] args) {
EventQueue.invokeLater(new Runnable() {
public void run() {
try {
JFrameExt frame = new JFrameExt();
frame.setVisible(true);
} catch (Exception e) {
e.printStackTrace();
}
}
});
}
public static class ScrollablePane extends JPanel implements Scrollable {
@Override
public Dimension getPreferredScrollableViewportSize() {
return new Dimension(100, 100);
}
@Override
public int getScrollableUnitIncrement(Rectangle visibleRect, int orientation, int direction) {
return 64;
}
@Override
public int getScrollableBlockIncrement(Rectangle visibleRect, int orientation, int direction) {
return 128;
}
@Override
public boolean getScrollableTracksViewportWidth() {
return true;
}
@Override
public boolean getScrollableTracksViewportHeight() {
return false;
}
}
public static class JFrameExt extends JFrame {
private JPanel contentPane;
/**
* Create the frame.
*/
public JFrameExt() {
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
setBounds(100, 100, 246, 164);
contentPane = new JPanel();
contentPane.setBorder(null);
contentPane.setLayout(new BorderLayout(0, 0));
setContentPane(contentPane);
JScrollPane scrollPane = new JScrollPane();
scrollPane.setViewportBorder(null);
scrollPane.setHorizontalScrollBarPolicy(ScrollPaneConstants.HORIZONTAL_SCROLLBAR_NEVER);
contentPane.add(scrollPane, BorderLayout.CENTER);
JPanel panel = new ScrollablePane();
scrollPane.setViewportView(panel);
GridBagLayout gbl_panel = new GridBagLayout();
// gbl_panel.columnWidths = new int[]{0, 0};
// gbl_panel.rowHeights = new int[]{0, 0, 0, 0, 0, 0, 0, 0};
// gbl_panel.columnWeights = new double[]{1.0, Double.MIN_VALUE};
// gbl_panel.rowWeights = new double[]{0.0, 1.0, 1.0, 1.0, 1.0, 1.0, 1.0, Double.MIN_VALUE};
panel.setLayout(gbl_panel);
panelWithText panelWithText_ = new panelWithText();
GridBagConstraints gbc_panelWithText_ = new GridBagConstraints();
gbc_panelWithText_.anchor = GridBagConstraints.NORTH;
gbc_panelWithText_.insets = new Insets(0, 0, 5, 0);
gbc_panelWithText_.fill = GridBagConstraints.HORIZONTAL;
gbc_panelWithText_.gridx = 0;
gbc_panelWithText_.gridy = 0;
gbc_panelWithText_.weightx = 1;
panel.add(panelWithText_, gbc_panelWithText_);
// panelWithText panelWithText__1 = new panelWithText();
// GridBagConstraints gbc_panelWithText__1 = new GridBagConstraints();
// gbc_panelWithText__1.insets = new Insets(0, 0, 5, 0);
// gbc_panelWithText__1.anchor = GridBagConstraints.NORTH;
//// gbc_panelWithText__1.fill = GridBagConstraints.HORIZONTAL;
// gbc_panelWithText__1.gridx = 0;
// gbc_panelWithText__1.gridy = 1;
// panel.add(panelWithText__1, gbc_panelWithText__1);
//
// panelWithText panelWithText__2 = new panelWithText();
// GridBagConstraints gbc_panelWithText__2 = new GridBagConstraints();
// gbc_panelWithText__2.insets = new Insets(0, 0, 5, 0);
//// gbc_panelWithText__2.fill = GridBagConstraints.BOTH;
// gbc_panelWithText__2.gridx = 0;
// gbc_panelWithText__2.gridy = 2;
// panel.add(panelWithText__2, gbc_panelWithText__2);
//
// panelWithText panelWithText__3 = new panelWithText();
// GridBagConstraints gbc_panelWithText__3 = new GridBagConstraints();
// gbc_panelWithText__3.insets = new Insets(0, 0, 5, 0);
//// gbc_panelWithText__3.fill = GridBagConstraints.BOTH;
// gbc_panelWithText__3.gridx = 0;
// gbc_panelWithText__3.gridy = 3;
// panel.add(panelWithText__3, gbc_panelWithText__3);
//
// panelWithText panelWithText__4 = new panelWithText();
// GridBagConstraints gbc_panelWithText__4 = new GridBagConstraints();
// gbc_panelWithText__4.insets = new Insets(0, 0, 5, 0);
//// gbc_panelWithText__4.fill = GridBagConstraints.BOTH;
// gbc_panelWithText__4.gridx = 0;
// gbc_panelWithText__4.gridy = 4;
// panel.add(panelWithText__4, gbc_panelWithText__4);
//
// panelWithText panelWithText__5 = new panelWithText();
// GridBagConstraints gbc_panelWithText__5 = new GridBagConstraints();
// gbc_panelWithText__5.insets = new Insets(0, 0, 5, 0);
//// gbc_panelWithText__5.fill = GridBagConstraints.BOTH;
// gbc_panelWithText__5.gridx = 0;
// gbc_panelWithText__5.gridy = 5;
// panel.add(panelWithText__5, gbc_panelWithText__5);
//
// panelWithText panelWithText__6 = new panelWithText();
// GridBagConstraints gbc_panelWithText__6 = new GridBagConstraints();
//// gbc_panelWithText__6.fill = GridBagConstraints.BOTH;
// gbc_panelWithText__6.gridx = 0;
// gbc_panelWithText__6.gridy = 6;
// panel.add(panelWithText__6, gbc_panelWithText__6);
setSize(300, 100);
}
}
public static class panelWithText extends JPanel {
/**
* Create the panel.
*/
public void me_resized(Dimension d) {
System.out.println("CALLED..");
super.setPreferredSize(d);
}
public panelWithText() {
setBackground(Color.DARK_GRAY);
setForeground(Color.WHITE);
setLayout(new BorderLayout(0, 0));
JTextArea txtrIveBeenReading = new JTextArea();
txtrIveBeenReading.setEditable(false);
txtrIveBeenReading.setColumns(28);
txtrIveBeenReading.setFont(new Font("Tahoma", Font.PLAIN, 10));
txtrIveBeenReading.setLineWrap(true);
txtrIveBeenReading.setWrapStyleWord(true);
txtrIveBeenReading.setText("\n A bunch of really important text here... A bunch of really important text here... A bunch of really important text here... A bunch of really important text here...\n");
txtrIveBeenReading.setForeground(Color.WHITE);
txtrIveBeenReading.setBackground(Color.DARK_GRAY);
add(txtrIveBeenReading, BorderLayout.CENTER);
}
}
}