如何设置的JTextPane的宽度，并使用文本相关的自动高度？

问题描述 投票：0回答：1

我已经找到this话题，但遗憾的是它不工作。我所试图做的事：我与开发的Java Swing的帮助下，小工具。对于我的工具的一些功能我想以此来提供一些信息，以显示自己设计的工具提示。

下面是一个例子：Short text

这是我的设置：

JDialog
+-jPanel (transparent container) 
| +-jPanel (dark background for my text pane)
|   +-jTextPane
+-jLabel (holds the arrow image)

如果用户将鼠标悬停在小我，他能看到的信息框。到现在为止还挺好。我创建了一个类此信息框，只设置文本并使其可见OB鼠标悬停并使其unvisible鼠标退出。

这就像一个魅力。如果我把另一个文本（在另一个我显示其他信息，我只能用我的公开的setText梅索德并重新设置可见，请参阅下图：Longer text, see auto height

图像具有相同的宽度，但另一个（自动）的高度。现在我的问题：我希望能够定义另一个宽度（以默认设置不同的一个），以避免过高的信息框，如果文本较长。但是，如果我这样做，我的信息框失败，请参阅：

Long text with changed width, fail

这是我的代码（我删除自动生成的Netbeans的代码）：

import java.awt.BorderLayout;
import java.awt.Color;

public class MyToolTip extends javax.swing.JDialog {

    public MyToolTip(java.awt.Frame parent, boolean modal) {
        super(parent, modal);
        initComponents();
        makeMeTransparent();
    }

    public void setText (String text, Integer width) {
        String s;

        s  = "<html><body><p style=\"margin-top: 0; color: #ffffff; font-family:Tahoma; font-size:11px\">";
        s += text;
        s += "</p></body></html>";

        jTextPane_Tip.setText(s);

        if(width == 0) {
            width = 250;
        }

        setWidth(width);
        repaint();
        pack();
    }

    private void setWidth (Integer width) {        
        jTextPane_Tip.setSize(width, Integer.MAX_VALUE);
        jTextPane_Tip.setSize(width, jTextPane_Tip.getPreferredSize().height);
    }

    /* Netbeans auto generated code (hidden) */

    private void makeMeTransparent() {
        setBackground(new Color(0, 255, 0, 0));
        jPanel_Main.setBackground(new Color(0, 255, 0, 0));
        setContentPane(new MyContentPane());
        getContentPane().setBackground(Color.BLACK);
        setLayout(new BorderLayout());
        getContentPane().add(jPanel_Main);
    }
}

如何设置JTextPane的宽度，并使用文本相关的自动高度？

编辑：

这是现在我的小例子：

文件MyTT.java：

package mytt;

public class MyTT {

    public static void main(String[] args) {
        NewJFrame frame = new NewJFrame();
        frame.setVisible(true);
    }
}

文件NewJFrame.java：

package mytt;

public class NewJFrame extends javax.swing.JFrame {

    private final MyToolTip tt;

    public NewJFrame() {
        initComponents();
        tt = new MyToolTip(this, false);
    }

    @SuppressWarnings("unchecked")
    // <editor-fold defaultstate="collapsed" desc="Generated Code">                          
    private void initComponents() {

        jLabel1 = new javax.swing.JLabel();
        jLabel2 = new javax.swing.JLabel();

        setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);

        jLabel1.setFont(new java.awt.Font("Tahoma", 0, 12)); // NOI18N
        jLabel1.setHorizontalAlignment(javax.swing.SwingConstants.CENTER);
        jLabel1.setText("Hover me for Tool-Tip (default width)");
        jLabel1.addMouseListener(new java.awt.event.MouseAdapter() {
            public void mouseEntered(java.awt.event.MouseEvent evt) {
                jLabel1MouseEntered(evt);
            }
            public void mouseExited(java.awt.event.MouseEvent evt) {
                jLabel1MouseExited(evt);
            }
        });

        jLabel2.setFont(new java.awt.Font("Tahoma", 0, 12)); // NOI18N
        jLabel2.setHorizontalAlignment(javax.swing.SwingConstants.CENTER);
        jLabel2.setText("Hover me for Tool-Tip (user defined width)");
        jLabel2.addMouseListener(new java.awt.event.MouseAdapter() {
            public void mouseEntered(java.awt.event.MouseEvent evt) {
                jLabel2MouseEntered(evt);
            }
            public void mouseExited(java.awt.event.MouseEvent evt) {
                jLabel2MouseExited(evt);
            }
        });

        javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane());
        getContentPane().setLayout(layout);
        layout.setHorizontalGroup(
            layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(layout.createSequentialGroup()
                .addContainerGap()
                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                    .addComponent(jLabel1, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
                    .addComponent(jLabel2, javax.swing.GroupLayout.DEFAULT_SIZE, 280, Short.MAX_VALUE))
                .addContainerGap())
        );
        layout.setVerticalGroup(
            layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(layout.createSequentialGroup()
                .addContainerGap()
                .addComponent(jLabel1)
                .addGap(108, 108, 108)
                .addComponent(jLabel2)
                .addContainerGap(javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE))
        );

        pack();
    }// </editor-fold>                        

    private void jLabel1MouseEntered(java.awt.event.MouseEvent evt) {                                     
        int x = jLabel1.getLocationOnScreen().x + jLabel1.getWidth() + 4;
        int y = jLabel1.getLocationOnScreen().y;   

        tt.setText("This is a simple example text. The width isn't changed and the height will be automatically set.",0);
        tt.setLocation(x,y);
        tt.setVisible(true);
    }                                    

    private void jLabel2MouseEntered(java.awt.event.MouseEvent evt) {                                     
        int x = jLabel2.getLocationOnScreen().x + jLabel1.getWidth() + 4;
        int y = jLabel2.getLocationOnScreen().y;   

        tt.setText("This is a simple example text. I set the width to a user defined value. This will crash the box somehow",400);
        tt.setLocation(x,y);
        tt.setVisible(true);
    }                                    

    private void jLabel1MouseExited(java.awt.event.MouseEvent evt) {                                    
        tt.setVisible(false);
    }                                   

    private void jLabel2MouseExited(java.awt.event.MouseEvent evt) {                                    
        tt.setVisible(false);
    }                                   

    /**
     * @param args the command line arguments
     */
    public static void main(String args[]) {
        /* Set the Nimbus look and feel */
        //<editor-fold defaultstate="collapsed" desc=" Look and feel setting code (optional) ">
        /* If Nimbus (introduced in Java SE 6) is not available, stay with the default look and feel.
         * For details see http://download.oracle.com/javase/tutorial/uiswing/lookandfeel/plaf.html 
         */
        try {
            for (javax.swing.UIManager.LookAndFeelInfo info : javax.swing.UIManager.getInstalledLookAndFeels()) {
                if ("Nimbus".equals(info.getName())) {
                    javax.swing.UIManager.setLookAndFeel(info.getClassName());
                    break;
                }
            }
        } catch (ClassNotFoundException | InstantiationException | IllegalAccessException | javax.swing.UnsupportedLookAndFeelException ex) {
            java.util.logging.Logger.getLogger(NewJFrame.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        }
        //</editor-fold>

        //</editor-fold>

        /* Create and display the form */
        java.awt.EventQueue.invokeLater(() -> {
            new NewJFrame().setVisible(true);
        });
    }

    // Variables declaration - do not modify                     
    private javax.swing.JLabel jLabel1;
    private javax.swing.JLabel jLabel2;
    // End of variables declaration                   
}

文件MyToolTip.java：

package mytt;

public class MyToolTip extends javax.swing.JDialog {

    public MyToolTip(java.awt.Frame parent, boolean modal) {
        super(parent, modal);
        initComponents();
    }

    public void setText (String text, Integer width) {     
        jTextPane_Tip.setText(text);

        // if the user doesn't defined a width, take the default width
        if(width == 0) width = 150;

        // resize the box
        setWidth(width);
    }

    private void setWidth (Integer width) {        
        jTextPane_Tip.setSize(width, Integer.MAX_VALUE);
        jTextPane_Tip.setSize(width, jTextPane_Tip.getPreferredSize().height);
        pack();
    }

    @SuppressWarnings("unchecked")
    // <editor-fold defaultstate="collapsed" desc="Generated Code">                          
    private void initComponents() {

        jPanel_Main = new javax.swing.JPanel();
        jPanel_Background = new javax.swing.JPanel();
        jTextPane_Tip = new javax.swing.JTextPane();

        setDefaultCloseOperation(javax.swing.WindowConstants.DISPOSE_ON_CLOSE);
        setTitle("Variable Platzhalter");
        setFocusableWindowState(false);
        setUndecorated(true);
        addKeyListener(new java.awt.event.KeyAdapter() {
            public void keyPressed(java.awt.event.KeyEvent evt) {
                formKeyPressed(evt);
            }
        });

        jPanel_Background.setBackground(new java.awt.Color(29, 29, 29));

        jTextPane_Tip.setEditable(false);
        jTextPane_Tip.setBackground(new java.awt.Color(29, 29, 29));
        jTextPane_Tip.setFont(new java.awt.Font("Tahoma", 0, 12)); // NOI18N
        jTextPane_Tip.setForeground(new java.awt.Color(255, 255, 255));
        jTextPane_Tip.setText("");

        javax.swing.GroupLayout jPanel_BackgroundLayout = new javax.swing.GroupLayout(jPanel_Background);
        jPanel_Background.setLayout(jPanel_BackgroundLayout);
        jPanel_BackgroundLayout.setHorizontalGroup(
            jPanel_BackgroundLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(javax.swing.GroupLayout.Alignment.TRAILING, jPanel_BackgroundLayout.createSequentialGroup()
                .addContainerGap()
                .addComponent(jTextPane_Tip, javax.swing.GroupLayout.DEFAULT_SIZE, 150, Short.MAX_VALUE)
                .addContainerGap())
        );
        jPanel_BackgroundLayout.setVerticalGroup(
            jPanel_BackgroundLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(jPanel_BackgroundLayout.createSequentialGroup()
                .addContainerGap()
                .addComponent(jTextPane_Tip)
                .addContainerGap())
        );

        javax.swing.GroupLayout jPanel_MainLayout = new javax.swing.GroupLayout(jPanel_Main);
        jPanel_Main.setLayout(jPanel_MainLayout);
        jPanel_MainLayout.setHorizontalGroup(
            jPanel_MainLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(jPanel_MainLayout.createSequentialGroup()
                .addGap(0, 0, 0)
                .addComponent(jPanel_Background, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE))
        );
        jPanel_MainLayout.setVerticalGroup(
            jPanel_MainLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addComponent(jPanel_Background, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
        );

        getContentPane().add(jPanel_Main, java.awt.BorderLayout.CENTER);

        pack();
        setLocationRelativeTo(null);
    }// </editor-fold>                        

    private void formKeyPressed(java.awt.event.KeyEvent evt) {                                
        this.dispose();
    }                               

    public static void main(String args[]) {
        try {
            for (javax.swing.UIManager.LookAndFeelInfo info : javax.swing.UIManager.getInstalledLookAndFeels()) {
                if ("Nimbus".equals(info.getName())) {
                    javax.swing.UIManager.setLookAndFeel(info.getClassName());
                    break;
                }
            }
        } catch (ClassNotFoundException | InstantiationException | IllegalAccessException | javax.swing.UnsupportedLookAndFeelException ex) {
            java.util.logging.Logger.getLogger(MyToolTip.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        }
        /* Create and display the dialog */
        java.awt.EventQueue.invokeLater(() -> {
            MyToolTip dialog = new MyToolTip(new javax.swing.JFrame(), true);
            dialog.addWindowListener(new java.awt.event.WindowAdapter() {
                @Override
                public void windowClosing(java.awt.event.WindowEvent e) {
                    System.exit(0);
                }
            });
            dialog.setVisible(true);
        });
    }

    // Variables declaration - do not modify                     
    private javax.swing.JPanel jPanel_Background;
    private javax.swing.JPanel jPanel_Main;
    private javax.swing.JTextPane jTextPane_Tip;
    // End of variables declaration                   
}

最小的例子的结果：Okay, no user defined width Fail, with user defined width

编辑2：

好了第二次尝试：这是我写的一个小例子，拥有自己的（无自动生成从NetBeans中的代码）。我希望这是最小的enougth。现在的好消息是：该程序的行为完全像我期待它（也来自我的真正的项目）。

MCVE.java：包MCVE;

import java.awt.Dimension;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;

public class MCVE {

    public static void main(String[] args) {

        MyToolTip tt = new MyToolTip(null,false);
        JFrame f = new JFrame();
        JLabel l1 = new JLabel("Please hover me (default size)");
        JLabel l2 = new JLabel("Please hover me (defined size)");
        JPanel p = new JPanel();

        l1.addMouseListener(new MouseAdapter() {

            @Override
            public void mouseEntered(MouseEvent evt) {
                int x = l1.getLocationOnScreen().x + l1.getWidth() + 4;
                int y = l1.getLocationOnScreen().y;   

                tt.setText("Lorem ipsum dolor sit amet, consetetur sadipscing elitr",200);
                tt.setLocation(x,y);
                tt.setVisible(true);
            }

            @Override
            public void mouseExited(MouseEvent evt) {
                tt.setVisible(false);
            }
        });

        l2.addMouseListener(new MouseAdapter() {

            @Override
            public void mouseEntered(MouseEvent evt) {
                int x = l2.getLocationOnScreen().x + l2.getWidth() + 4;
                int y = l2.getLocationOnScreen().y;   

                tt.setText("Lorem ipsum dolor sit amet, consetetur sadipscing elitr, sed diam nonumy eirmod tempor invidunt ut labore et dolore magna aliquyam erat, sed diam voluptua. At vero eos et accusam et justo duo dolores et ea rebum. Stet clita kasd gubergren, no sea takimata sanctus est Lorem ipsum dolor sit amet.",300);
                tt.setLocation(x,y);
                tt.setVisible(true);
            }

            @Override
            public void mouseExited(MouseEvent evt) {
                tt.setVisible(false);
            }
        });

        p.add(l1);
        p.add(l2);
        p.setPreferredSize(new Dimension(200,50));

        f.add(p);
        f.pack();
        f.setLocationRelativeTo(null);       
        f.setVisible(true);
    }
}

MyToolTip.java：

package mcve;

import java.awt.Dimension;
import javax.swing.JPanel;
import javax.swing.JTextPane;

public class MyToolTip extends javax.swing.JDialog { 
    private JPanel p;
    private JTextPane tp;

    public MyToolTip(java.awt.Frame parent, boolean modal) {
        super(parent, modal);
        initComp();
    }

    public void setText(String text, Integer width) {
        tp.setText(text);

        if(width > 0) {
            tp.setSize(width, Integer.MAX_VALUE);
            tp.setPreferredSize(new Dimension(width, tp.getPreferredSize().height));
        }

        pack();
    }

    private void initComp () {
        p = new JPanel();
        tp = new JTextPane();
        p.add(tp);
        add(p);
    }
}

现在的问题是：为什么在我的第二个最小的例子，但不是在我的项目工作:-(

java swing width jtextpane
1个回答
0
投票

在setWidth(Integer)类MyToolTip方法，您呼叫jTextPane_Tip.setSize()两次。当我删除了第一个电话

jTextPane_Tip.setSize(width, Integer.MAX_VALUE);

有效。

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