Java ImageIcon componentToImageIcon(Component c, String description, boolean paintBorder)

Description

create an ImageIcon delegate of a component

License

Open Source License

Declaration

public static ImageIcon componentToImageIcon(Component c, String description, boolean paintBorder) 

Method Source Code

//package com.java2s;
/*/*from w  w w. ja v a 2s .c o  m*/
 *   Copyright (C) 2006  The Concord Consortium, Inc.,
 *   25 Love Lane, Concord, MA 01742
 *
 *   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
 *
 * END LICENSE */

import java.awt.AWTException;

import java.awt.Component;

import java.awt.Dimension;

import java.awt.Graphics2D;

import java.awt.Image;

import java.awt.Rectangle;
import java.awt.Robot;

import java.awt.image.BufferedImage;

import javax.swing.ImageIcon;

import javax.swing.JComponent;

public class Main {
    private static Robot robot;

    /** create an ImageIcon delegate of a component */
    public static ImageIcon componentToImageIcon(Component c, String description, boolean paintBorder) {
        return componentToImageIcon(c, description, paintBorder, 1, Image.SCALE_SMOOTH);
    }

    /** create an ImageIcon delegate of a component with the specified scale */
    public static ImageIcon componentToImageIcon(Component c, String description, boolean paintBorder, float scale,
            int hints) {
        if (c == null)
            return null;
        if (!c.isShowing())
            return null;
        if (scale > 1.0f || scale <= 0.0f)
            throw new IllegalArgumentException("scale must be in (0, 1].");
        Dimension size = c.getSize();
        BufferedImage bi = null;
        if (c instanceof JComponent) {
            bi = new BufferedImage(size.width, size.height, BufferedImage.TYPE_INT_RGB);
            Graphics2D g2 = bi.createGraphics();
            c.paint(g2);
            // FIXME: if c is a JEditorPane, calling the paint method forces the images to be reloaded incorrectly.
            g2.dispose(); // This caused empty image before. Was it fixed?
        } else {
            if (robot == null) {
                try {
                    robot = new Robot();
                } catch (AWTException e) {
                    e.printStackTrace();
                    robot = null;
                }
            }
            if (robot != null) {
                bi = robot.createScreenCapture(new Rectangle(c.getLocationOnScreen().x, c.getLocationOnScreen().y,
                        c.getWidth(), c.getHeight()));
            } else {
                bi = new BufferedImage(size.width, size.height, BufferedImage.TYPE_INT_RGB);
                Graphics2D g2 = bi.createGraphics();
                c.paint(g2);
                g2.dispose();
            }
        }
        ImageIcon icon = null;
        if (scale < 1.0f) {
            icon = new ImageIcon(
                    bi.getScaledInstance((int) (bi.getWidth() * scale), (int) (bi.getHeight() * scale), hints));
        } else {
            if (paintBorder) {
                int x = bi.getMinX();
                int y = bi.getMinY();
                int w = bi.getWidth();
                int h = bi.getHeight();
                for (int i = x; i < x + w; i++) {
                    bi.setRGB(i, y, 0x000000);
                    bi.setRGB(i, y + h - 1, 0x000000);
                }
                for (int i = y; i < y + h; i++) {
                    bi.setRGB(x, i, 0x000000);
                    bi.setRGB(x + w - 1, i, 0x000000);
                }
            }
            icon = new ImageIcon(bi);
        }
        icon.setDescription(description);
        return icon;
    }
}

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