corejava第9版

corejava第9版/v2ch06/tableSelection/TableSelectionFrame.java

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+package tableSelection;
+
+import java.awt.event.*;
+import java.util.*;
+import javax.swing.*;
+import javax.swing.table.*;
+
+/**
+ * This frame shows a multiplication table and has menus for setting the row/column/cell selection modes, and for adding
+ * and removing rows and columns.
+ */
+class TableSelectionFrame extends JFrame
+{
+   public TableSelectionFrame()
+   {
+      setTitle("TableSelectionTest");
+      setSize(DEFAULT_WIDTH, DEFAULT_HEIGHT);
+
+      // set up multiplication table
+
+      model = new DefaultTableModel(10, 10);
+
+      for (int i = 0; i < model.getRowCount(); i++)
+         for (int j = 0; j < model.getColumnCount(); j++)
+            model.setValueAt((i + 1) * (j + 1), i, j);
+
+      table = new JTable(model);
+
+      add(new JScrollPane(table), "Center");
+
+      removedColumns = new ArrayList<TableColumn>();
+
+      // create menu
+
+      JMenuBar menuBar = new JMenuBar();
+      setJMenuBar(menuBar);
+
+      JMenu selectionMenu = new JMenu("Selection");
+      menuBar.add(selectionMenu);
+
+      final JCheckBoxMenuItem rowsItem = new JCheckBoxMenuItem("Rows");
+      final JCheckBoxMenuItem columnsItem = new JCheckBoxMenuItem("Columns");
+      final JCheckBoxMenuItem cellsItem = new JCheckBoxMenuItem("Cells");
+
+      rowsItem.setSelected(table.getRowSelectionAllowed());
+      columnsItem.setSelected(table.getColumnSelectionAllowed());
+      cellsItem.setSelected(table.getCellSelectionEnabled());
+
+      rowsItem.addActionListener(new ActionListener()
+      {
+         public void actionPerformed(ActionEvent event)
+         {
+            table.clearSelection();
+            table.setRowSelectionAllowed(rowsItem.isSelected());
+            cellsItem.setSelected(table.getCellSelectionEnabled());
+         }
+      });
+      selectionMenu.add(rowsItem);
+
+      columnsItem.addActionListener(new ActionListener()
+      {
+         public void actionPerformed(ActionEvent event)
+         {
+            table.clearSelection();
+            table.setColumnSelectionAllowed(columnsItem.isSelected());
+            cellsItem.setSelected(table.getCellSelectionEnabled());
+         }
+      });
+      selectionMenu.add(columnsItem);
+
+      cellsItem.addActionListener(new ActionListener()
+      {
+         public void actionPerformed(ActionEvent event)
+         {
+            table.clearSelection();
+            table.setCellSelectionEnabled(cellsItem.isSelected());
+            rowsItem.setSelected(table.getRowSelectionAllowed());
+            columnsItem.setSelected(table.getColumnSelectionAllowed());
+         }
+      });
+      selectionMenu.add(cellsItem);
+
+      JMenu tableMenu = new JMenu("Edit");
+      menuBar.add(tableMenu);
+
+      JMenuItem hideColumnsItem = new JMenuItem("Hide Columns");
+      hideColumnsItem.addActionListener(new ActionListener()
+      {
+         public void actionPerformed(ActionEvent event)
+         {
+            int[] selected = table.getSelectedColumns();
+            TableColumnModel columnModel = table.getColumnModel();
+
+            // remove columns from view, starting at the last
+            // index so that column numbers aren't affected
+
+            for (int i = selected.length - 1; i >= 0; i--)
+            {
+               TableColumn column = columnModel.getColumn(selected[i]);
+               table.removeColumn(column);
+
+               // store removed columns for "show columns" command
+
+               removedColumns.add(column);
+            }
+         }
+      });
+      tableMenu.add(hideColumnsItem);
+
+      JMenuItem showColumnsItem = new JMenuItem("Show Columns");
+      showColumnsItem.addActionListener(new ActionListener()
+      {
+         public void actionPerformed(ActionEvent event)
+         {
+            // restore all removed columns
+            for (TableColumn tc : removedColumns)
+               table.addColumn(tc);
+            removedColumns.clear();
+         }
+      });
+      tableMenu.add(showColumnsItem);
+
+      JMenuItem addRowItem = new JMenuItem("Add Row");
+      addRowItem.addActionListener(new ActionListener()
+      {
+         public void actionPerformed(ActionEvent event)
+         {
+            // add a new row to the multiplication table in
+            // the model
+
+            Integer[] newCells = new Integer[model.getColumnCount()];
+            for (int i = 0; i < newCells.length; i++)
+               newCells[i] = (i + 1) * (model.getRowCount() + 1);
+            model.addRow(newCells);
+         }
+      });
+      tableMenu.add(addRowItem);
+
+      JMenuItem removeRowsItem = new JMenuItem("Remove Rows");
+      removeRowsItem.addActionListener(new ActionListener()
+      {
+         public void actionPerformed(ActionEvent event)
+         {
+            int[] selected = table.getSelectedRows();
+
+            for (int i = selected.length - 1; i >= 0; i--)
+               model.removeRow(selected[i]);
+         }
+      });
+      tableMenu.add(removeRowsItem);
+
+      JMenuItem clearCellsItem = new JMenuItem("Clear Cells");
+      clearCellsItem.addActionListener(new ActionListener()
+      {
+         public void actionPerformed(ActionEvent event)
+         {
+            for (int i = 0; i < table.getRowCount(); i++)
+               for (int j = 0; j < table.getColumnCount(); j++)
+                  if (table.isCellSelected(i, j)) table.setValueAt(0, i, j);
+         }
+      });
+      tableMenu.add(clearCellsItem);
+   }
+
+   private DefaultTableModel model;
+   private JTable table;
+   private ArrayList<TableColumn> removedColumns;
+
+   private static final int DEFAULT_WIDTH = 400;
+   private static final int DEFAULT_HEIGHT = 300;
+}