com.ibm.as400.vaccess.DBCellEditor Maven / Gradle / Ivy

Go to download
Show more of this group Show more artifacts with this name
Show all versions of jt400 Show documentation
The Open Source version of the IBM Toolbox for Java
The newest version!
///////////////////////////////////////////////////////////////////////////////
//                                                                             
// JTOpen (IBM Toolbox for Java - OSS version)                              
//                                                                             
// Filename: DBCellEditor.java
//                                                                             
// The source code contained herein is licensed under the IBM Public License   
// Version 1.0, which has been approved by the Open Source Initiative.         
// Copyright (C) 1997-2001 International Business Machines Corporation and     
// others. All rights reserved.                                                
//                                                                             
///////////////////////////////////////////////////////////////////////////////

package com.ibm.as400.vaccess;

import javax.swing.DefaultCellEditor;
import javax.swing.JScrollPane;
import javax.swing.JTable;
import javax.swing.JTextArea;
import javax.swing.JTextField;
import java.awt.Color;
import java.awt.Component;
import java.awt.event.KeyAdapter;
import java.awt.event.KeyEvent;



/**
 * Used to be able to edit cell text in updatable SQLResultSetTablePanes.
**/
class DBCellEditor extends DefaultCellEditor
{
  private static final String copyright = "Copyright (C) 1997-2001 International Business Machines Corporation and others.";

  static final JTextArea textArea_ = new JTextArea();
  static final JScrollPane scrollPane_ = new JScrollPane(textArea_);

  // Also see the DBCellSelector class.

  static
  {
    textArea_.setEditable(true);
    textArea_.setBackground(Color.white);
    textArea_.setLineWrap(false);

    // The text in the cell scrolls automatically, so we don't need a horizontal bar.
    // Plus, the cell isn't big enough to hold both the scrollbar and the text.    
    scrollPane_.setHorizontalScrollBarPolicy(JScrollPane.HORIZONTAL_SCROLLBAR_NEVER);
    // The scroll pane is used for all cells when we are editable.
    // We put the scroll bar there so the user knows that we are scrollable.
    scrollPane_.setVerticalScrollBarPolicy(JScrollPane.VERTICAL_SCROLLBAR_ALWAYS);
  }

  
  /**
   * Calls the DefaultCellEditor constructor with a JTextField.
  **/
  public DBCellEditor()
  {
    super(new JTextField()); // Just so we can get constructed.
  }

  
  /**
   * Returns the value inside the cell. This is just the text inside the JTextArea.
   * This method is needed for the JTable to properly call setValueAt() on the model
   * after a cell is finished being edited.
  **/
  public Object getCellEditorValue()
  {
    return textArea_.getText();
  }


  /**
   * Always use a JTextArea, since someone could paste multi-line text into the cell.
  **/  
  public Component getTableCellEditorComponent(JTable table, Object value, boolean isSelected, int row, int column)
  {
    // If the text is only one line, then use the regular JTextField;
    // otherwise, use a JTextArea wrapped in a vertically scrollable JScrollPane.
    
    // Swing doesn't like it if the value is null.
    String s = (value == null ? "" : value.toString());
    textArea_.setText(s);
    return scrollPane_;
  }
}