tablecellrendertest.java

来自「java核心技术源代码」· Java 代码 · 共 275 行

/**
   @version 1.00 2001-07-21
   @author Cay Horstmann
*/

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

/**
   This program demonstrates cell rendering and editing
   in a table.
*/
public class TableCellRenderTest
{  
   public static void main(String[] args)
   {  
      JFrame frame = new TableCellRenderFrame();
      frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
      frame.show();
   }
}

/**
   This frame contains a table of planet data.
*/
class TableCellRenderFrame extends JFrame
{  
   public TableCellRenderFrame()
   {  
      setTitle("TableCellRenderTest");
      setSize(WIDTH, HEIGHT);

      TableModel model = new PlanetTableModel();
      JTable table = new JTable(model);

      // set up renderers and editors

      table.setDefaultRenderer(Color.class,
         new ColorTableCellRenderer());
      table.setDefaultEditor(Color.class,
         new ColorTableCellEditor());

      JComboBox moonCombo = new JComboBox();
      for (int i = 0; i <= 20; i++)
         moonCombo.addItem(new Integer(i));
      TableColumnModel columnModel = table.getColumnModel();
      TableColumn moonColumn
         = columnModel.getColumn(PlanetTableModel.MOON_COLUMN);
      moonColumn.setCellEditor(new DefaultCellEditor(moonCombo));

      // show table

      table.setRowHeight(100);
      getContentPane().add(new JScrollPane(table), 
         BorderLayout.CENTER);
   }

   private static final int WIDTH = 600;
   private static final int HEIGHT = 400;
}

/** 
   The planet table model specifies the values, rendering
   and editing properties for the planet data.
*/
class PlanetTableModel extends AbstractTableModel
{  
   public String getColumnName(int c)
   {  
      return columnNames[c];
   }

   public Class getColumnClass(int c)
   {  
      return cells[0][c].getClass();
   }

   public int getColumnCount()
   {  
      return cells[0].length;
   }

   public int getRowCount()
   {  
      return cells.length;
   }

   public Object getValueAt(int r, int c)
   {  
      return cells[r][c];
   }

   public void setValueAt(Object obj, int r, int c)
   {  
      cells[r][c] = obj;
   }

   public boolean isCellEditable(int r, int c)
   {  
      return c == NAME_COLUMN
         || c == MOON_COLUMN
         || c == GASEOUS_COLUMN
         || c == COLOR_COLUMN;
   }

   public static final int NAME_COLUMN = 0;
   public static final int MOON_COLUMN = 2;
   public static final int GASEOUS_COLUMN = 3;
   public static final int COLOR_COLUMN = 4;

   private Object[][] cells =
   {  
      { 
         "Mercury", new Double(2440),  new Integer(0),
         Boolean.FALSE, Color.yellow,
         new ImageIcon("Mercury.gif")
      },
      { 
         "Venus", new Double(6052), new Integer(0),
         Boolean.FALSE, Color.yellow,
         new ImageIcon("Venus.gif")
      },
      { 
         "Earth", new Double(6378), new Integer(1),
         Boolean.FALSE, Color.blue,
         new ImageIcon("Earth.gif")
      },
      { 
         "Mars", new Double(3397), new Integer(2),
         Boolean.FALSE, Color.red,
         new ImageIcon("Mars.gif")
      },
      { 
         "Jupiter", new Double(71492), new Integer(16),
         Boolean.TRUE, Color.orange,
         new ImageIcon("Jupiter.gif")
      },
      { 
         "Saturn", new Double(60268), new Integer(18),
         Boolean.TRUE, Color.orange,
         new ImageIcon("Saturn.gif")
      },
      { 
         "Uranus", new Double(25559), new Integer(17),
         Boolean.TRUE, Color.blue,
         new ImageIcon("Uranus.gif")
      },
      { 
         "Neptune", new Double(24766), new Integer(8),
         Boolean.TRUE, Color.blue,
         new ImageIcon("Neptune.gif")
      },
      { 
         "Pluto", new Double(1137), new Integer(1),
         Boolean.FALSE, Color.black,
         new ImageIcon("Pluto.gif")
      }
   };

   private String[] columnNames =
   {  
      "Planet", "Radius", "Moons", "Gaseous", "Color", "Image"
   };
}

/**
   This renderer renders a color value as a panel with the
   given color.
*/
class ColorTableCellRenderer implements TableCellRenderer
{  
   public Component getTableCellRendererComponent(JTable table,
      Object value, boolean isSelected, boolean hasFocus,
      int row, int column)
   {  
      panel.setBackground((Color)value);
      return panel;
   }

   // the following panel is returned for all cells, with
   // the background color set to the Color value of the cell

   private JPanel panel = new JPanel();
}

/**
   This editor pops up a color dialog to edit a cell value
*/
class ColorTableCellEditor extends AbstractCellEditor
   implements TableCellEditor
{  
   ColorTableCellEditor()
   {  
      panel = new JPanel();
      // prepare color dialog

      colorChooser = new JColorChooser();
      colorDialog = JColorChooser.createDialog(null,
         "Planet Color", false, colorChooser, 
         new 
            ActionListener() // OK button listener
            {  
               public void actionPerformed(ActionEvent event)
               {  
                  stopCellEditing();
               }
            },
         new 
            ActionListener() // Cancel button listener
            {  
               public void actionPerformed(ActionEvent event)
               {  
                  cancelCellEditing();
               }
            });
      colorDialog.addWindowListener(new
         WindowAdapter()
         {
            public void windowClosing(WindowEvent event)
            {
               cancelCellEditing();
            }
         });
   }

   public Component getTableCellEditorComponent(JTable table,
      Object value, boolean isSelected, int row, int column)
   {  
      // this is where we get the current Color value. We
      // store it in the dialog in case the user starts editing
      colorChooser.setColor((Color)value);
      return panel;
   }

   public boolean shouldSelectCell(EventObject anEvent)
   {  
      // start editing
      colorDialog.setVisible(true);

      // tell caller it is ok to select this cell
      return true;
   }

   public void cancelCellEditing()
   {  
      // editing is canceled--hide dialog
      colorDialog.setVisible(false);
      super.cancelCellEditing();
   }

   public boolean stopCellEditing()
   {  
      // editing is complete--hide dialog
      colorDialog.setVisible(false);
      super.stopCellEditing();

      // tell caller is is ok to use color value
      return true;
   }

   public Object getCellEditorValue()
   {  
      return colorChooser.getColor();
   }

   private Color color;
   private JColorChooser colorChooser;
   private JDialog colorDialog;
   private JPanel panel;
}