Created
October 17, 2012 10:49
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| import javax.imageio.ImageIO; | |
| import javax.imageio.ImageTypeSpecifier; | |
| import javax.swing.*; | |
| import java.awt.*; | |
| import java.awt.geom.AffineTransform; | |
| import java.awt.image.BufferedImage; | |
| import java.io.File; | |
| import java.io.IOException; | |
| public class ImagePanel extends JPanel { | |
| private BufferedImage image; | |
| private boolean imageLoaded = false; | |
| private double rotValue = 0; | |
| private double scaleValue = 1; | |
| public void loadImage(String imageFilename) { | |
| try { | |
| image = ImageIO.read(new File(imageFilename)); | |
| imageLoaded = true; | |
| scaleValue = 1; | |
| repaint(); | |
| } catch (IOException e) { | |
| e.printStackTrace(); | |
| } | |
| } | |
| public void zoom(float zoom) { | |
| scaleValue = zoom; | |
| repaint(); | |
| } | |
| public void rotate(int rot) { | |
| rotValue = rot; | |
| repaint(); | |
| } | |
| @Override | |
| public void paintComponent(Graphics g) { | |
| super.paintComponent(g); | |
| if(imageLoaded) { | |
| draw(image, g); | |
| } | |
| } | |
| private void draw(BufferedImage image, Graphics g) { | |
| int width = (int) (image.getWidth() * scaleValue); | |
| int height = (int) (image.getHeight() * scaleValue); | |
| BufferedImage newImage = new BufferedImage(getWidth(), getHeight(), BufferedImage.TYPE_INT_ARGB); | |
| Graphics2D newImageGfx = newImage.createGraphics(); | |
| AffineTransform transform = new AffineTransform(); | |
| transform.rotate(Math.toRadians(rotValue), getWidth() / 2, getHeight() / 2); | |
| newImageGfx.setTransform(transform); | |
| int x = (getWidth() - width) / 2; | |
| int y = (getHeight() - height) / 2; | |
| newImageGfx.drawImage(image, x, y, width, height, null); | |
| Graphics2D g2 = (Graphics2D) g; | |
| g2.setRenderingHint(RenderingHints.KEY_INTERPOLATION, | |
| RenderingHints.VALUE_INTERPOLATION_BICUBIC); | |
| g2.drawImage(newImage, 0, 0, null); | |
| } | |
| } |
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