tooltipheadertableexample.java

tame,扩展了好多SWing组件:JTable

/* (swing1.1) */
package tame.examples;

import java.awt.BorderLayout;
import java.awt.event.MouseEvent;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;

import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTable;
import javax.swing.table.DefaultTableModel;
import javax.swing.table.JTableHeader;
import javax.swing.table.TableColumnModel;

/**
@author Nobuo Tamemasa
@version 1.0 02/25/99
*/
public class ToolTipHeaderTableExample extends JPanel {

  public ToolTipHeaderTableExample(){
    setLayout(new BorderLayout());
    String[] headerStr  = {"default","jw"      ,"ja"      ,"la"   ,"unknown"};
    String[] toolTipStr = {""       ,"Javanese","Japanese","Latin"};

    DefaultTableModel dm = new DefaultTableModel(headerStr, 4);
    JTable table = new JTable(dm);

    ToolTipHeader header = new ToolTipHeader(table.getColumnModel());
    header.setToolTipStrings(toolTipStr);
    header.setToolTipText("Default ToolTip TEXT");
    table.setTableHeader(header);

    JScrollPane pane = new JScrollPane(table);
    add(pane, BorderLayout.CENTER);
  }

  public static void main(String[] args) {
    JFrame f= new JFrame("ToolTipHeaderTable Example");
    f.getContentPane().add(new ToolTipHeaderTableExample(), BorderLayout.CENTER);
    f.setSize(400, 100);
    f.setVisible(true);
    f.addWindowListener(new WindowAdapter() {
      public void windowClosing(WindowEvent e) {System.exit(0);}
    });
  }

  class ToolTipHeader extends JTableHeader {
    String[] toolTips;

    public ToolTipHeader(TableColumnModel model) {
      super(model);
    }

    public String getToolTipText(MouseEvent e) {
      int col  = columnAtPoint(e.getPoint());
      int modelCol = getTable().convertColumnIndexToModel(col);
      String retStr;
      try {
        retStr = toolTips[modelCol];
      } catch (NullPointerException ex) {
        retStr = "";
      } catch (ArrayIndexOutOfBoundsException ex) {
        retStr = "";
      }
      if (retStr.length() < 1) {
        retStr = super.getToolTipText(e);
      }
      return retStr;
    }

    public void setToolTipStrings(String[] toolTips) {
      this.toolTips = toolTips;
    }
  }
}