JAddressTextField.java

/*
 *  The MIT License
 *
 *  Copyright 2010 Georgios Migdos <cyberpython@gmail.com>.
 *
 *  Permission is hereby granted, free of charge, to any person obtaining a copy
 *  of this software and associated documentation files (the "Software"), to deal
 *  in the Software without restriction, including without limitation the rights
 *  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 *  copies of the Software, and to permit persons to whom the Software is
 *  furnished to do so, subject to the following conditions:
 *
 *  The above copyright notice and this permission notice shall be included in
 *  all copies or substantial portions of the Software.
 *
 *  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 *  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 *  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 *  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 *  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 *  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 *  THE SOFTWARE.
 */
package bmach.ui.gui.components;

import java.awt.Color;
import java.awt.Font;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.RenderingHints;
import java.awt.event.FocusEvent;
import java.awt.event.FocusListener;
import javax.swing.Icon;
import javax.swing.ImageIcon;
import javax.swing.UIManager;

/**
 *
 * @author Georgios Migdos <cyberpython@gmail.com>
 */
public class JAddressTextField extends JIconTextField{

    private String textWhenNotFocused;
    private Icon acceptIcon;
    private Icon errorIcon;
    private Icon pencilIcon;

    public JAddressTextField() {
        super();
        this.textWhenNotFocused = "Memory address...";
        this.acceptIcon = new ImageIcon(JAddressTextField.class.getResource("/bmach/ui/gui/resources/accept.png"));
        this.errorIcon = new ImageIcon(JAddressTextField.class.getResource("/bmach/ui/gui/resources/cancel.png"));
        this.pencilIcon = new ImageIcon(JAddressTextField.class.getResource("/bmach/ui/gui/resources/pencil.png"));
        
        this.addFocusListener(new FocusListener() {

            public void focusGained(FocusEvent e) {
                repaint();
            }

            public void focusLost(FocusEvent e) {
                repaint();
            }
        });
    }

    public String getTextWhenNotFocused() {
        return this.textWhenNotFocused;
    }

    public void setTextWhenNotFocused(String newText) {
        this.textWhenNotFocused = newText;
    }

    @Override
    protected void paintComponent(Graphics g) {
        String text = getText();
        if(text.equals("")){
            this.setIcon(pencilIcon);
        }else if(text.matches("0x[0-9a-fA-F]{2}")){
            this.setIcon(acceptIcon);
        }else{
            this.setIcon(errorIcon);
        }
        super.paintComponent(g);

        if (!this.hasFocus() && this.getText().equals("")) {
            int height = this.getHeight();
            Font prev = g.getFont();
            Font italic = prev.deriveFont(Font.ITALIC);
            Color prevColor = g.getColor();
            g.setFont(italic);
            g.setColor(UIManager.getColor("textInactiveText"));
            int h = g.getFontMetrics().getHeight();
            int textBottom = (height - h) / 2 + h - 4;
            int x = this.getInsets().left;
            Graphics2D g2d = (Graphics2D) g;
            RenderingHints hints = g2d.getRenderingHints();
            g2d.setRenderingHint(RenderingHints.KEY_TEXT_ANTIALIASING, RenderingHints.VALUE_TEXT_ANTIALIAS_ON);
            g2d.drawString(textWhenNotFocused, x, textBottom);
            g2d.setRenderingHints(hints);
            g.setFont(prev);
            g.setColor(prevColor);
        }

    }
}