jeditornumber.java

是一个专门设计用于触摸屏的POS(point of sales)应用软件

//    Tina POS is a point of sales application designed for touch screens.
//    Copyright (C) 2005 Adrian Romero Corchado.
//    http://sourceforge.net/projects/tinapos
//
//    This program is free software; you can redistribute it and/or modify
//    it under the terms of the GNU General Public License as published by
//    the Free Software Foundation; either version 2 of the License, or
//    (at your option) any later version.
//
//    This program is distributed in the hope that it will be useful,
//    but WITHOUT ANY WARRANTY; without even the implied warranty of
//    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
//    GNU General Public License for more details.
//
//    You should have received a copy of the GNU General Public License
//    along with this program; if not, write to the Free Software
//    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

package net.adrianromero.editor;

import java.awt.Toolkit;
import javax.swing.Icon;
import net.adrianromero.basic.BasicException;
import net.adrianromero.format.Formats;

public abstract class JEditorNumber extends JEditorAbstract {
    
    // Variable numerica
    private final static int NUMBER_ZERONULL = 0;
    private final static int NUMBER_INT = 1;
    private final static int NUMBER_DEC = 2;
    
    private int m_iNumberStatus;
    private String m_sNumber;
    private boolean m_bNegative;
    
    private Formats m_fmt;
    
    /** Creates a new instance of JEditorNumber */
    public JEditorNumber() {
        m_fmt = getFormat();
        reset();
    }
    
    protected abstract Formats getFormat();
    
    public void reset() {
        
        String sOldText = getText();
        
        m_sNumber = "";
        m_bNegative = false;
        m_iNumberStatus = NUMBER_ZERONULL;
        
        reprintText();
        
        firePropertyChange("Text", sOldText, getText());
    }   
    
    public void setValue(double dvalue) {
        
        String sOldText = getText();

        if (dvalue >= 0.0) {
            m_sNumber = formatDouble(dvalue);
            m_bNegative = false;
            m_iNumberStatus = NUMBER_ZERONULL;            
        } else {
            m_sNumber = formatDouble(-dvalue);
            m_bNegative = true;
            m_iNumberStatus = NUMBER_ZERONULL;            
        }
        reprintText();
        
        firePropertyChange("Text", sOldText, getText());
    } 
    
    public double getValue() throws BasicException {  
        try {
            return Double.parseDouble(getText());
        } catch (NumberFormatException e) {
            throw new BasicException(e);
        }
    }
    
    public void setValueInteger(int ivalue) {
        
        String sOldText = getText();
        
        if (ivalue >= 0) {
            m_sNumber = Integer.toString(ivalue);
            m_bNegative = false;
            m_iNumberStatus = NUMBER_ZERONULL;            
        } else {
            m_sNumber = Integer.toString(-ivalue);
            m_bNegative = true;
            m_iNumberStatus = NUMBER_ZERONULL;            
        }
        reprintText();
        
        firePropertyChange("Text", sOldText, getText());
    } 
    
    public int getValueInteger() throws BasicException {  
        try {
            return Integer.parseInt(getText());
        } catch (NumberFormatException e) {
            throw new BasicException(e);
        }
    }    
    
    private String formatDouble(double dvalue) {
        String sNumber = Double.toString(dvalue);
        if (sNumber.endsWith(".0")) {
            sNumber = sNumber.substring(0,  sNumber.length() - 2);
        }
        return sNumber;
    }
    
    protected String getEditMode() {
        return "-1.23";
    }  
    
    public String getText() {
        return (m_bNegative ? "-" : "") + m_sNumber;
    }   
    
    protected int getAlignment() {
        return javax.swing.SwingConstants.RIGHT;
    }
    
    protected String getTextEdit() {
        return getText();
    }
    
    protected String getTextFormat() throws BasicException {
        return m_fmt.formatValue(new Double(getValue()));
    }
    
    protected void typeCharInternal(char cTrans) {
        transChar(cTrans);
    }
    
    protected void transCharInternal(char cTrans) {
        
        String sOldText = getText();

        if (cTrans == '\u007f') {
            reset();
        } else if (cTrans == '-') {
            m_bNegative = !m_bNegative;
        } else if ((cTrans == '0')
        && (m_iNumberStatus == NUMBER_ZERONULL)) {
            // m_iNumberStatus = NUMBER_ZERO;
            m_sNumber = "0";
        } else if ((cTrans == '1' || cTrans == '2' || cTrans == '3' || cTrans == '4' || cTrans == '5' || cTrans == '6' || cTrans == '7' || cTrans == '8' || cTrans == '9')
        && (m_iNumberStatus == NUMBER_ZERONULL)) {
            m_iNumberStatus = NUMBER_INT;
            m_sNumber = Character.toString(cTrans);
        } else if (cTrans == '.' &&  m_iNumberStatus == NUMBER_ZERONULL) {
            m_iNumberStatus = NUMBER_DEC;
            m_sNumber = "0.";
            
        } else if ((cTrans == '0' || cTrans == '1' || cTrans == '2' || cTrans == '3' || cTrans == '4' || cTrans == '5' || cTrans == '6' || cTrans == '7' || cTrans == '8' || cTrans == '9')
        && (m_iNumberStatus == NUMBER_INT)) {
            //m_iNumberStatus = NUMBER_INT;
            m_sNumber += cTrans;
        } else if (cTrans == '.' &&  m_iNumberStatus == NUMBER_INT) {
            m_iNumberStatus = NUMBER_DEC;
            m_sNumber += '.';
            
        } else if ((cTrans == '0' || cTrans == '1' || cTrans == '2' || cTrans == '3' || cTrans == '4' || cTrans == '5' || cTrans == '6' || cTrans == '7' || cTrans == '8' || cTrans == '9')
        && (m_iNumberStatus == NUMBER_DEC)) {
            m_sNumber += cTrans;
            
        } else {
            Toolkit.getDefaultToolkit().beep();
        }
        
        firePropertyChange("Text", sOldText, getText());
    } 
   
}