摆动工具提示位置

Question

我想显示JList中元素的工具提示。我使用setToolTipText(str)。我想要的是该工具提示应显示在该元素的右侧。我使用getToolTipLocation(mouseEvent)，但无法获得理想的效果。我怎样才能做到这一点？

---

更新

我的列表类： -

public class MyList extends JList { 

    private static final long serialVersionUID = 2170990919011800182L; 

    DefaultListModel model; 

    public MyList(DefaultListModel model){ 
     super(model); 
     this.model = model; 
    } 

    public Point getToolTipLocation(MouseEvent e) { 
     return new Point(75, locationToIndex(e.getPoint())); 
    } 

    @Override 
    public int getNextMatch(String prefix, int startIndex, Position.Bias bias) { 
     if (prefix == null) 
      throw new IllegalArgumentException("'prefix' must not be" 
        + " null."); 
     if (startIndex < 0) 
      throw new IllegalArgumentException("'startIndex' must not" 
        + " be less than zero."); 

     if (startIndex >= model.getSize()) 
      throw new IllegalArgumentException("'startIndex' must not" 
        + " be greater than the number of" 
        + " elements."); 

     int result = -1; 
     int current = startIndex; 
     int delta = -1; 
     int itemCount = model.getSize(); 
     boolean finished = false; 
     prefix = prefix.toUpperCase(); 

     if (bias == Position.Bias.Forward) 
      delta = 1; 
     while (!finished) 
     { 
      String itemStr = ((User) model.getElementAt(current)).getName().toString().toUpperCase(); 
      if (itemStr.indexOf(prefix)!=-1) 
       return current; 
      current = (current + delta); 
      if (current == -1) 
       current += itemCount; 
      else 
       current = current % itemCount; 
      if(current == 0) 
       finished = true; 
      else      
       finished = current == startIndex; 
     } 
     return result; 
    } 
} 

我的渲​​染器类： -

public class MyRender extends JPanel implements ListCellRenderer { 

    //--class vars 
    public MyRender(Atalk atalk) { 
     //--initialize class var 
    } 

    @Override 
    public JComponent getListCellRendererComponent(JList list, Object value, 
      int index, boolean isSelected, boolean cellHasFocus) { 
     //-- put vales in class vars and add them in JPanel 
     setToolTipText(user.getName()+"<br/>"user.getAddress()); 
     return null; 
    } 
} 

代码，我申报清单。

JList[] list = new JList[5]; 
DefaultListModel[] model = new DefaultListModel[5]; 
model[0] = new DefaultListModel(); 
list[0] = new MyList(model[0]); 
model[1] = new DefaultListModel(); 
list[1] = new MyList(model[0]); 
model[2] = new DefaultListModel(); 
list[2] = new MyList(model[0]); 
model[3] = new DefaultListModel(); 
list[3] = new MyList(model[0]); 
model[4] = new DefaultListModel(); 
list[4] = new MyList(model[0]); 

Answer 1

在发生问题时发布您的http://sscce.org。 2行代码不会告诉我们你在做什么。

下面是一个简单SSCCE：

import java.awt.*; 
import java.awt.event.*; 
import javax.swing.*; 

public class ListToolTip extends JFrame 
{ 
    public ListToolTip() 
    { 
     DefaultListModel model = new DefaultListModel(); 
     model.addElement("one"); 
     model.addElement("two"); 
     model.addElement("three"); 
     model.addElement("four"); 
     model.addElement("five"); 
     model.addElement("six"); 
     model.addElement("seven"); 
     model.addElement("eight"); 
     model.addElement("nine"); 
     model.addElement("ten"); 

     JList list = new JList(model) 
     { 
      public String getToolTipText(MouseEvent e) 
      { 
       int row = locationToIndex(e.getPoint()); 
       Object o = getModel().getElementAt(row); 
       return o.toString(); 
      } 

      public Point getToolTipLocation(MouseEvent e) 
      { 
       int row = locationToIndex(e.getPoint()); 
       Rectangle r = getCellBounds(row, row); 
       return new Point(r.width, r.y); 
      } 
     }; 

     JScrollPane scrollPane = new JScrollPane(list); 
     getContentPane().add(scrollPane); 
    } 

    public static void main(String[] args) 
    { 
     ListToolTip frame = new ListToolTip(); 
     frame.setDefaultCloseOperation(EXIT_ON_CLOSE); 
     frame.setSize(400, 100); 
     frame.setVisible(true); 
    } 
}