resize Icon - Java 2D Graphics

Java examples for 2D Graphics:Icon

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Description

resize Icon

Demo Code


//package com.java2s;
import java.awt.Graphics2D;
import java.awt.RenderingHints;
import java.awt.image.BufferedImage;
import java.io.File;
import javax.imageio.ImageIO;
import javax.swing.ImageIcon;
import javax.swing.JOptionPane;

public class Main {
    public static ImageIcon resizeIcon(File src) {
        int newHeight = 80, newWidth = 80; // Variables for the new height and width
        int priorHeight = 0, priorWidth = 0;
        BufferedImage image = null;
        ImageIcon sizeImage; // Need to return an imageicon for JLabel

        try {//w  w w  .  j a  v a2s. co m
            image = ImageIO.read(src); // read the image
        } catch (Exception e) {
            e.printStackTrace();
            JOptionPane
                    .showMessageDialog(null, "Image could not be found!");
        }
        //set icon to image
        sizeImage = new ImageIcon(image);
        //set old dimensions
        if (sizeImage != null) {
            priorHeight = sizeImage.getIconHeight();
            priorWidth = sizeImage.getIconWidth();
        }

        //Create a new Buffered Image and Graphic2D object
        //Notice I am using ABGR and not RGB, alpha channel must be used for transparency
        BufferedImage resizedImg = new BufferedImage(newWidth, newHeight,
                BufferedImage.TYPE_4BYTE_ABGR);
        Graphics2D g2 = resizedImg.createGraphics();

        //This was to rotate the image of wire 45 degrees(method takes radians so 45 * pi/180 = .785
        //It works just fine but the layout manager is clipping it and only half is showing. We can fix later or throw it out. Not a big priority issue obviously
        if (src.toString().contains("WIRE")) {
            //g2.rotate(.785, 10, 0);
        }
        //Use the Graphic object to draw a new image to the image in the buffer
        g2.setRenderingHint(RenderingHints.KEY_INTERPOLATION,
                RenderingHints.VALUE_INTERPOLATION_BILINEAR);
        g2.drawImage(image, 0, 0, newWidth, newHeight, null);
        //need to dispose after creating Graphics instance
        g2.dispose();

        // Convert the buffered image into an ImageIcon for return
        return (new ImageIcon(resizedImg));
    }
}

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