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///////////////////////////////////////////////////////////////////////////////
//                                                                             
// JTOpen (IBM Toolbox for Java - OSS version)                              
//                                                                             
// Filename: SQLQueryFieldsPane.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) 1997-2000 International Business Machines Corporation and     
// others. All rights reserved.                                                
//                                                                             
///////////////////////////////////////////////////////////////////////////////

package com.ibm.as400.vaccess;

import javax.swing.JPanel;
import javax.swing.JTable;
import javax.swing.border.EmptyBorder;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import java.beans.PropertyChangeListener;
import java.beans.PropertyChangeEvent;
import java.io.IOException;
import java.sql.Types;
import java.util.Vector;



/**
The SQLQueryFieldsPane class represents a panel which
contains a fields table,
used for a page of the SQLQueryBuilderPane notebook.
**/
abstract class SQLQueryFieldsPane
extends JPanel
{
  private static final String copyright = "Copyright (C) 1997-2000 International Business Machines Corporation and others.";


// This class is not meant to be serialized, it should be transient.
// This class has items marked transient even though it is not
// serializable because otherwise errors were received when
// serializing objects that contained this class (even though they
// were transient instances.  readObject() was added to be safe.

// GUI components
protected SQLMetaDataTablePane fields_;
protected SQLMetaDataTableModel fieldModel_;
protected SQLQueryBuilderPane parent_;

// Indicates if fieldModel_ has changed.
protected boolean fieldsChanged_ = false;

// Listen to changes in the fields table.
transient protected FieldListener_ fieldListener_ = null;


/**
Constructs a SQLQuerySelectPane object.
init must be called to build the GUI contents.
@param parent The parent of this panel.
**/
public SQLQueryFieldsPane (SQLQueryBuilderPane parent)
{
    super();
    parent_ = parent;
    fieldModel_ = parent_.fields_;
    // Add listener to changes to table fields.
    fieldListener_ = new FieldListener_();
    parent_.addFieldListener(fieldListener_);
}


/**
Returns the name of the field at the given row.
@param index The row of field.
@return The name of the field at the given row.
**/
protected String fieldName(int index)
{
    return (String)
        (fieldModel_.getValueAt(index, SQLMetaDataTableModel.FIELD_NAME_));
}


/**
Returns the names of the fields which are characters.
@return The names of the character fields.
**/
protected String[] getCharacterFieldNames()
{
    int numRows = fieldModel_.getRowCount();
    Vector results = new Vector();
    for (int i=0; i 1) // if double click
                {
                    // Get the object that was double clicked, if any.
                    int row = table.rowAtPoint(event.getPoint());
                    if (row != -1)  // -1 means no object under mouse
                    {
                            rowPicked(row);
                    }
                }
            }
        }
    );
}



/**
Update the fieldModel if needed.
**/
public void update()
{
    if (fieldsChanged_)
    {
        // Build new model.
        fieldModel_ = parent_.fields_;

        // Set table to use new model.
        fields_.setDataModel(fieldModel_);

        fieldsChanged_ = false;
    }
}



/**
Class to listen for property changes on the fields contained in the
tables associated with the query.
**/
/* private */ class FieldListener_ //@B0C - made package scope
implements PropertyChangeListener, java.io.Serializable //@B0C - made serializable
{
    public void propertyChange(PropertyChangeEvent event)
    {
        fieldsChanged_ = true;
    }
}

}