JPanel中的JLabel JTable工具提示不起作用

时间：2013-03-14 09:14:20

标签： java swing jtable jpanel

我有一个带有自定义单元格渲染器的JTable。我正在将一个包含多个JLabel的面板添加到JTable中。问题是，当鼠标悬停在每个JLabel上时，我似乎无法获得每个工具的工具提示。我不想设置jpanel工具提示，我想显示我在jpanel内的3个JLabel上设置的工具提示。

继承我的JTable初始化：

public static JTable users = new JTable(model) {
    @Override
    public boolean isCellEditable(int row, int column) {
        return false;

    }

    @Override
    public Class<? extends Object> getColumnClass(int column) {
        return getValueAt(0, column).getClass();
    }

    @Override
    public String getToolTipText(MouseEvent event) {
        String tip = null;
        Point p = event.getPoint();

        // Locate the renderer under the event location
        int hitColumnIndex = columnAtPoint(p);
        int hitRowIndex = rowAtPoint(p);

        if (hitColumnIndex != -1 && hitRowIndex != -1) {
            TableCellRenderer renderer = getCellRenderer(hitRowIndex, hitColumnIndex);
            Component component = prepareRenderer(renderer, hitRowIndex, hitColumnIndex);
            Rectangle cellRect = getCellRect(hitRowIndex, hitColumnIndex, false);
            component.setBounds(cellRect);
            component.validate();
            component.doLayout();
            p.translate(-cellRect.x, -cellRect.y);
            Component comp = component.getComponentAt(p);
            if (comp instanceof JComponent) {
                return ((JComponent) comp).getToolTipText();
            }
        }

        // No tip from the renderer get our own tip
        if (tip == null) {
            tip = getToolTipText();
        }

        return tip;
    }
};

和我的自定义单元格渲染代码：

public class TransparentRenderer extends DefaultTableCellRenderer  implements TableCellRenderer {

public JPanel p = new JPanel();

    ........

// This method is called each time a cell in a column
// using this renderer needs to be rendered.
@Override
public Component getTableCellRendererComponent(JTable table, Object value,
        boolean isSelected, boolean hasFocus, int rowIndex, int vColIndex) {

    ....


    // Now lets color in the table accordingly..
    if (value.toString().equals(gmeLobby.user)) {
        JLabel l = new JLabel(value.toString());
        l.setForeground(Color.YELLOW);
        p.add(l);

        //setHorizontalAlignment(SwingConstants.LEFT);
    } else {
        // If username is not yours
        //setHorizontalAlignment(SwingConstants.LEFT);

        if(value instanceof ImageIcon)
        {
            final JLabel l = new JLabel();
            l.setIcon((ImageIcon) value);
            l.setAlignmentY(0.85f);
            l.setToolTipText(((ImageIcon) value).getDescription());
            p.add(l);

            if(vColIndex==0)
            {
            final JLabel w = new JLabel();
            final JLabel d = new JLabel();
            try {
                w.setIcon(gmeImages.gmeImages("globe"));
                w.setToolTipText(((ImageIcon) value).getDescription());
                d.setIcon(gmeImages.gmeImages("dnds"));
                d.setToolTipText(((ImageIcon) value).getDescription());
            } catch (Exception e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }
            p.add(d);
            p.add(w);
            setPosition(w, 5, 0);
            setPosition(d, 15, 2);
            }
            setPosition(l, 0, 0);

        }else{
            JLabel l = new JLabel(value.toString());
            l.setForeground(Color.WHITE);
            p.add(l);

        }
        return p;
    }

    if (isSelected) {
        setBackground(new Color(rsbc.getRed() - 100, rsbc.getGreen(), rsbc.getBlue()));
    } else {
        setBackground(bgu);
    }

    if (hasFocus) {
        // this cell is the anchor and the table has the focus
        p.setBackground(new Color(rsbc.getRed() - 100, rsbc.getGreen(), rsbc.getBlue()));
    }


    // Since the renderer is a component, return itself

    return this;
}

任何帮助都会很棒。 JTable上工具提示的当前覆盖似乎只是添加了第一个组件的工具提示。

由于

编辑：

感谢所有帮助过的人，在安德里亚评论SSCCE时，我似乎解决了问题，不确定错误是什么，我相信这可能与我初始化imageicon变量的方式有关

无论如何，每个图像上有一个工具提示的单元格中包含2个图像的示例程序如下：

import java.awt.*;
import java.awt.event.MouseEvent;
import java.awt.image.BufferedImage;
import java.io.File;
import java.net.URL;

import javax.imageio.ImageIO;
import javax.swing.*;
import javax.swing.border.MatteBorder;
import javax.swing.table.DefaultTableCellRenderer;
import javax.swing.table.DefaultTableModel;
import javax.swing.table.TableCellRenderer;
import javax.swing.table.TableColumn;
import javax.swing.text.BadLocationException;

@SuppressWarnings("serial")
public class design extends JFrame{

// Create the JTable users list and set editable to false
public static DefaultTableModel model = new DefaultTableModel();
    public static JTable users = new JTable(model) {
        @Override
        public boolean isCellEditable(int row, int column) {
            return false;

        }

        @Override
        public Class<? extends Object> getColumnClass(int column) {
            return getValueAt(0, column).getClass();
        }

        @Override
        public String getToolTipText(MouseEvent event) {
            String tip = null;
            Point p = event.getPoint();

            // Locate the renderer under the event location
            int hitColumnIndex = columnAtPoint(p);
            int hitRowIndex = rowAtPoint(p);

            if (hitColumnIndex != -1 && hitRowIndex != -1) {
                TableCellRenderer renderer = getCellRenderer(hitRowIndex, hitColumnIndex);
                Component component = prepareRenderer(renderer, hitRowIndex, hitColumnIndex);
                Rectangle cellRect = getCellRect(hitRowIndex, hitColumnIndex, false);
                component.setBounds(cellRect);
                component.validate();
                component.doLayout();
                p.translate(-cellRect.x, -cellRect.y);
                Component comp = component.getComponentAt(p);
                if (comp instanceof JComponent) {
                    return ((JComponent) comp).getToolTipText();
                }
            }

            // No tip from the renderer get our own tip
            if (tip == null) {
                tip = getToolTipText();
            }

            return tip;
        }
    };

/**
 * @param args
 * @throws Exception 
 */
public design() throws Exception
{
    initialize();

    setSize(400, 400);
    this.setDefaultCloseOperation(EXIT_ON_CLOSE);
    add(users);
    setVisible(true);
}

public static void main(String[] args) throws Exception {
    // TODO Auto-generated method stub
    new design();
}

public static void initialize() throws Exception
{

    model.addColumn("icons");
    model.addColumn("text");

    users.setRowHeight(40);

    TableColumn col = users.getColumnModel().getColumn(0);
    col.setCellRenderer(new TransparentRenderer());
    TableColumn col2 = users.getColumnModel().getColumn(1);
    col2.setCellRenderer(new TransparentRenderer());

    model.addRow(new Object[] { new ImageIcon(), "text here" });
}

   }

 class TransparentRenderer extends JPanel  implements TableCellRenderer {
private static final long serialVersionUID = 1L;
public JPanel p = new JPanel();
private static SpringLayout spring = new SpringLayout();

public TransparentRenderer() throws Exception, BadLocationException {p.setLayout(spring);}

// This method is called each time a cell in a column
// using this renderer needs to be rendered.
@Override
public Component getTableCellRendererComponent(JTable table, Object value,
        boolean isSelected, boolean hasFocus, int rowIndex, int vColIndex)       {

        if(value instanceof ImageIcon)
        {            
            if(vColIndex==0)
            {
            JLabel w = new JLabel();
            JLabel d = new JLabel();
            try {
                ImageIcon icon1 = new ImageIcon();
                extracted("http://fxtrade.oanda.com/wandacache/star_icon-c10fffd09c7a7548f329f56e446f3cfe5463558b.png"
                        , icon1, "Tooltip for icon 1");

                ImageIcon icon2 = new ImageIcon();
                extracted("http://hotels.online.com.sg/DB/icon/star_icon2.gif"
                        , icon2, "Tooltip for icon 2");

                w.setIcon(icon1);
                w.setToolTipText("ToolTip 1");
                d.setIcon(icon2);
                d.setToolTipText("ToolTip 2");
            } catch (Exception e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }
            p.add(d);
            p.add(w);
            setPosition(d, 5, 2);
            setPosition(w, 5, 0);
            }

            return p;
        }else{
            add(new JLabel(value.toString()));
        }       
    return this;
}

public void setPosition(JComponent c, int w, int n)
{
    spring.putConstraint(SpringLayout.WEST, c, w, SpringLayout.WEST, p);
    spring.putConstraint(SpringLayout.NORTH, c, n, SpringLayout.NORTH, p);
}

public void extracted(String link, ImageIcon icon, String desc) throws Exception
{
    BufferedImage image = ImageIO.read(new URL(link));
    icon.setImage(image);

    if(desc.equals("")){} else{ icon.setDescription(desc);}
}
}

感谢所有帮助过的人：）

1 个答案:

答案 0 :(得分：0)

您的代码是否有效？ TransparentRenderer是每列的单例，并且逐行为每个单元格调用getTableCellRendererComponent。似乎将要渲染新子节点的每个单元格添加到变量p中。这可能就是为什么你总是只看到第一个组件的原因。

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