finddialog.java

这是一款应用程序与数据库联接

/*
 * @author yeshaowei [e-mail] 
 */
package com.cownew.JDBMonitor.listenerImpl.sckListenerClient;

import java.awt.Color;
import java.awt.GridLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

import javax.swing.BorderFactory;
import javax.swing.ButtonGroup;
import javax.swing.JButton;
import javax.swing.JCheckBox;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JOptionPane;
import javax.swing.JPanel;
import javax.swing.JRadioButton;
import javax.swing.JTextArea;
import javax.swing.JTextField;
import javax.swing.border.TitledBorder;
import javax.swing.event.DocumentEvent;
import javax.swing.event.DocumentListener;

import com.cownew.JDBMonitor.listenerImpl.uicommon.JCownewDialog;

public class FindDialog extends JCownewDialog  
{ 
	private static final long serialVersionUID = -5174218961507366106L;
	
	private static final int COMPONENTDEFAULTHEIGHT = 20;
	private static FindDialog instance;
    private JTextArea textAreaToFind; 
    private JLabel findLabel; 
    private JTextField txtFind; 
    private JButton btnFindNext, btnCancel; 
    private JCheckBox checkboxCaseSensitive; 
    private JPanel directionPanel; 
    private JRadioButton rbBackward, rbForward; 
    private ButtonGroup btnGroupDirection; 
    private StringBuffer findString; 
     
    public static FindDialog getFindDialog(JFrame owner, JTextArea textArea)
    {
    	if(instance==null)
    	{
    		instance = new FindDialog(owner,textArea);
    	}
    	return instance;
    }
    
    protected void initUI()
    {
    	super.initUI();
    	container.setLayout(null); 
        findLabel = new JLabel( "Text to find：" ); 
        findLabel.setBounds(10, 20, 80, COMPONENTDEFAULTHEIGHT); 
        container.add( findLabel ); 
        txtFind = new JTextField(); 
        txtFind.setBounds(130, 20, 130, COMPONENTDEFAULTHEIGHT); 
        txtFind.getDocument().addDocumentListener( 
            new DocumentListener() 
            { 
                public void changedUpdate( DocumentEvent e ) 
                { 
                } 
                 
                public void insertUpdate( DocumentEvent e ) 
                { 
                    btnFindNext.setEnabled( true ); 
                } 
                 
                public void removeUpdate( DocumentEvent e ) 
                { 
                    if( txtFind.getText().equals( "" ) )  
                        btnFindNext.setEnabled( false ); 
                } 
            } 
        ); 
        container.add( txtFind ); 
        btnFindNext = new JButton( "Next" ); 
        getRootPane().setDefaultButton(btnFindNext);
        btnFindNext.setBounds(280, 20, 100, COMPONENTDEFAULTHEIGHT); 
        btnFindNext.setEnabled( !txtFind.getText().equals( "" ) ); 
        btnFindNext.addActionListener( 
            new ActionListener() 
            { 
                public void actionPerformed( ActionEvent e ) 
                { 
                    findString.delete( 0, findString.length() ); 
                    findString.append( txtFind.getText() ); 
                    find(); 
                } 
            } 
        ); 
        container.add( btnFindNext ); 
        checkboxCaseSensitive = new JCheckBox( "Case Sensitive" ); 
        checkboxCaseSensitive.setBounds(10, 70, 120, COMPONENTDEFAULTHEIGHT); 
        container.add( checkboxCaseSensitive ); 
        directionPanel = new JPanel(); 
        directionPanel.setLayout(new GridLayout(2,1));
        directionPanel.setBounds(130, 50, 130, 60); 
        directionPanel.setBorder( new TitledBorder( BorderFactory.createLineBorder( Color.BLACK ), "Direction" ) ); 
        rbBackward = new JRadioButton( "Backward" ); 
        directionPanel.add( rbBackward ); 

        rbForward = new JRadioButton( "Forward" ); 
        rbForward.setSelected( true ); 
        directionPanel.add( rbForward ); 
        btnGroupDirection = new ButtonGroup(); 
        btnGroupDirection.add( rbBackward ); 
        btnGroupDirection.add( rbForward ); 
        container.add( directionPanel ); 
        btnCancel = new JButton( "Cancel" ); 
        btnCancel.setBounds(280, 60, 100, COMPONENTDEFAULTHEIGHT); 
        btnCancel.addActionListener( 
            new ActionListener() 
            { 
                public void actionPerformed( ActionEvent e ) 
                { 
                    cancel();
                } 
            } 
        ); 
        container.add( btnCancel ); 
        setSize( 400, 150 ); 
        setResizable( false ); 
    }
    
    private FindDialog( JFrame owner, JTextArea textArea) 
    { 
        super( owner,false);  

        setTitle("Find");
        textAreaToFind = textArea; 
        findString = new StringBuffer(textArea.getText()); 
    } 
     
    public void find() 
    { 
        int x = textAreaToFind.getCaretPosition(); 
        if( textAreaToFind.getSelectedText() != null && 
            textAreaToFind.getSelectedText().toLowerCase().equals( findString.toString().toLowerCase() ) 
                && rbBackward.isSelected() )  
                x--; 
        String tString = textAreaToFind.getText(); 
        String fString = findString.toString(); 
        if( ! checkboxCaseSensitive.isSelected() ) 
        { 
            tString = tString.toLowerCase(); 
            fString = fString.toLowerCase(); 
        } 
        if( rbForward.isSelected() ) 
        { 
            x = tString.indexOf( fString, x ); 
        } 
        else 
        { 
            String str = tString.substring( 0, x ); 
            x = str.lastIndexOf( fString, x - fString.length() ); 
        } 
        if( x == -1 ) 
        { 
            JOptionPane.showMessageDialog( getOwner(), "\"" + fString + "\" not found!" ); 
        } 
        else 
        { 
            textAreaToFind.select( x, x + fString.length() ); 
        } 
    } 
}