numberfield.java

打印管理程序,测试完全通过.windows开发环境.

/*
    $Author: $
    $Date: $
    $Revision: $
    $NoKeywords: $
*/

package jp.co.ntl.awt;

import java.awt.TextField;
import java.awt.event.*;
import java.awt.*;

public class NumberField extends TextField {
	/**
	 * 
	 */
	private static final long serialVersionUID = 1L;
    public static final int UINT    = 0;
    public static final int UFLOAT  = 1;
    public static final int INT     = 2;
    public static final int FLOAT   = 3;

    static final int VALID_NUMBER = 0;
    static final int NO_NUMBER = 1;
    static final int SMALL_NUMBER = 2;
    static final int BIG_NUMBER = 3;

    int figure;   //寘悢
    int type;
    boolean validRange = false;
    float minimum = 0;
    float maximum = 0;

    boolean validEffective = false;
    int effective = 0; //桳岠悢帤

    public NumberField(int figure, int type, float minimum, float maximum) {
		super(figure);
		this.figure = figure;
		this.type = type;
		validRange = true;
        this.minimum = minimum;
        this.maximum = maximum;
        
        enableEvents(AWTEvent.KEY_EVENT_MASK);
    }

    public NumberField(int figure, int type) {
		super(figure);
		this.figure = figure;
		this.type = type;
		validRange = false;

        enableEvents(AWTEvent.KEY_EVENT_MASK);
    }

    public NumberField(int figure) {
        this(figure, UINT);
    }

    public void setEffective(int effective) {
        validEffective = true;
        this.effective = effective;
    }

    public float getMinimum() {
        return minimum;
    }

    public float getMaximum() {
        return maximum;
    }

    public void setValue(float value) {
        switch (type) {
        case UINT:
        case INT:
            int i = (int)value;
            setText("" + i);
            break;
        case UFLOAT:
        case FLOAT:
            setText("" + value);
            break;
        }
    }

    public void setValue(int value) {
        setText("" + value);
    }

    public float getFloatValue() throws NumberFormatException {
        return Float.valueOf(getText()).floatValue();
    }

    public int getIntValue() throws NumberFormatException {
        return Integer.parseInt(getText());
    }

    public void clear() {
        setText("");
    }

    protected void processKeyEvent(KeyEvent ke) {
        if (ke.getID() == KeyEvent.KEY_PRESSED) {
            String text = getText();
            switch (ke.getKeyChar()) {
            case '.':
                if (type == INT || type == UINT) {
                    ke.consume();
                }
                break;
            case '-':
                if (type == INT || type == FLOAT) {
                    if ((getSelectedText().length() != getText().length()) && (getCaretPosition() != 0)) {
                        ke.consume();
                    }
                } else {
                    ke.consume();
                }
                break;
            case '0':
                if (text.length() != 0 && getSelectedText().length() == 0) {
                    if ((getCaretPosition() == 0 && text.indexOf('.') != 0)
                            || (getCaretPosition() == 1 && text.charAt(0) == '0')) {
                        ke.consume();
                        break;
                    }
                }
            case '1': case '2': case '3': case '4':
            case '5': case '6': case '7': case '8': case '9':
			    if (getSelectedText().length() == 0) {
			        if (text.length() >= figure) {
    				    ke.consume();
    			    } else if (validEffective) {
    			        int pos = text.indexOf('.');
    			        if (pos != -1) {
    			            if (getCaretPosition() > pos && text.length() - pos - 1 >= effective) {
    			                ke.consume();
    			            }
    			        }
                    }
                }
                break;
            default:
                switch (ke.getKeyCode()) {
    		    case KeyEvent.VK_BACK_SPACE:
    		    case KeyEvent.VK_DELETE:
        	    case KeyEvent.VK_TAB:
    		    case KeyEvent.VK_LEFT:
    		    case KeyEvent.VK_RIGHT:
    		    case KeyEvent.VK_SHIFT:
    		    case KeyEvent.VK_END:
    		    case KeyEvent.VK_HOME:
    		    case KeyEvent.VK_ENTER:
                    break;
                default:
                    ke.consume();
                }
            }
        }
        
        super.processKeyEvent(ke);
    }

/*	private int validNumber(String text) {
        if (text.length() == 0) {
            return VALID_NUMBER;
        }
        try {
//            float f = Float.valueOf(text).floatValue();
/*
            if (validRange) {
                if (f < minimum) {
                    return SMALL_NUMBER;
                } else if (f > maximum) {
                    return BIG_NUMBER;
                }
            }
*/
/*            return VALID_NUMBER;
        } catch (Exception e) {
            //惓偟偄悢抣偱偼側偄
            return NO_NUMBER;
        }
    }*/
}