zaurustextfield.java

hsql是很有名的嵌入式数据库

/* Copyright (c) 2001-2005, The HSQL Development Group
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 * Redistributions of source code must retain the above copyright notice, this
 * list of conditions and the following disclaimer.
 *
 * Redistributions in binary form must reproduce the above copyright notice,
 * this list of conditions and the following disclaimer in the documentation
 * and/or other materials provided with the distribution.
 *
 * Neither the name of the HSQL Development Group nor the names of its
 * contributors may be used to endorse or promote products derived from this
 * software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL HSQL DEVELOPMENT GROUP, HSQLDB.ORG,
 * OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */


package org.hsqldb.util;

import java.awt.Color;
import java.awt.TextField;

/**
 * Class declaration
 *
 *
 * @author ulrivo@users
 * @version 1.0.0
 */

// a TextField for the GUI which implements ZaurusComponent
//
public class ZaurusTextField extends TextField implements ZaurusComponent {

    int countChanges;

    public ZaurusTextField(int i) {

        super(i);

        countChanges = 0;
    }

    public void clearChanges() {
        countChanges = 0;
    }

    public void clearContent() {
        super.setText("");
    }

    public String getContent() {
        return super.getText();
    }

    // the initially setText increments the counter
    public boolean hasChanged() {
        return countChanges > 1;
    }

    public void requestFocus() {
        super.requestFocus();
    }

    public void setChanged() {
        countChanges++;
    }

    public void setContent(String s) {
        super.setText(s);
    }

    public void setEditable(boolean b) {

        super.setEditable(b);

        if (b) {
            super.setBackground(Color.white);
        } else {
            super.setBackground(Color.lightGray);
        }    // end of if (b)else
    }
}