Как культур subimage из образа 14 Декабрь 2009 by admin·0 Comments Вы можете использовать следующий код, чтобы обрезать subimage из образа. import java.awt.*; import java.awt.event.*; import java.awt.image.*; import java.io.*; import javax.imageio.ImageIO; import javax.swing.*; import javax.swing.event.MouseInputAdapter; public class Cropping extends JPanel { BufferedImage image; Dimension size; Rectangle clip; boolean showClip; public Cropping(BufferedImage image) { this.image = image; size = new Dimension(image.getWidth(), image.getHeight()); showClip = false; } protected void paintComponent(Graphics g) { super.paintComponent(g); Graphics2D g2 = (Graphics2D)g; g2.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON); int x = (getWidth() - size.width)/2; int y = (getHeight() - size.height)/2; g2.drawImage(image, x, y, this); if(showClip) { if(clip == null) createClip(); g2.setPaint(Color.red); g2.draw(clip); } } public void setClip(int x, int y) { // keep clip within raster int x0 = (getWidth() - size.width)/2; int y0 = (getHeight() - size.height)/2; if(x < x0 || x + clip.width > x0 + size.width || y < y0 || y + clip.height > y0 + size.height) return; clip.setLocation(x, y); repaint(); } public Dimension getPreferredSize() { return size; } private void createClip() { clip = new Rectangle(140, 140); clip.x = (getWidth() - clip.width)/2; clip.y = (getHeight() - clip.height)/2; } private void clipImage() { BufferedImage clipped = null; try { int w = clip.width; int h = clip.height; int x0 = (getWidth() - size.width)/2; int y0 = (getHeight() - size.height)/2; int x = clip.x - x0; int y = clip.y - y0; clipped = image.getSubimage(x, y, w, h); } catch(RasterFormatException rfe) { System.out.println("raster format error: " + rfe.getMessage()); return; } JLabel label = new JLabel(new ImageIcon(clipped)); JOptionPane.showMessageDialog(this, label, "clipped image", JOptionPane.PLAIN_MESSAGE); } private JPanel getUIPanel() { final JCheckBox clipBox = new JCheckBox("show clip", showClip); clipBox.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent e) { showClip = clipBox.isSelected(); repaint(); } }); JButton clip = new JButton("clip image"); clip.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent e) { clipImage(); } }); JPanel panel = new JPanel(); panel.add(clipBox); panel.add(clip); return panel; } public static void main(String[] args) throws IOException { File file = new File("images/cougar.jpg"); Cropping test = new Cropping(ImageIO.read(file)); ClipMover mover = new ClipMover(test); test.addMouseListener(mover); test.addMouseMotionListener(mover); JFrame f = new JFrame(); f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); f.getContentPane().add(new JScrollPane(test)); f.getContentPane().add(test.getUIPanel(), "South"); f.setSize(400,400); f.setLocation(200,200); f.setVisible(true); } } class ClipMover extends MouseInputAdapter { Cropping cropping; Point offset; boolean dragging; public ClipMover(Cropping c) { cropping = c; offset = new Point(); dragging = false; } public void mousePressed(MouseEvent e) { Point p = e.getPoint(); if(cropping.clip.contains(p)) { offset.x = p.x - cropping.clip.x; offset.y = p.y - cropping.clip.y; dragging = true; } } public void mouseReleased(MouseEvent e) { dragging = false; } public void mouseDragged(MouseEvent e) { if(dragging) { int x = e.getX() - offset.x; int y = e.getY() - offset.y; cropping.setClip(x, y); } } } other
