以下は私のコードです。スライダーを動かしてズームを実装しようとしています。しかし、効果は現れません。これについて私を助けてください。迷っています。私はJavaが初めてで、これにNetbeansを使用しています。
さらに、拡大した画像をクリックして、実際の画像に対応する点を表示する必要があります。どうすればこれを可能にできますか?
public class TrialZoom extends javax.swing.JFrame {
/**
* Creates new form TrialZoom
*/
private float scaleX, scaleY;
Point p = new Point();
Point q = new Point();
Vector<Point> v = new Vector();
Vector<Float> v_scale = new Vector();
public TrialZoom() {
initComponents();
}
@SuppressWarnings("unchecked")
// <editor-fold defaultstate="collapsed" desc="Generated Code">
private void initComponents() {
jPanel1 = new javax.swing.JPanel();
jButton1 = new javax.swing.JButton();
jPanel2 = new javax.swing.JPanel();
jPanel3 = new javax.swing.JPanel();
jSlider2 = new javax.swing.JSlider();
jPanel4 = new javax.swing.JPanel();
jLabel1 = new javax.swing.JLabel();
setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);
jPanel1.setLayout(new java.awt.GridLayout(1, 0));
jButton1.setText("Done");
jButton1.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
jButton1ActionPerformed(evt);
}
});
jPanel1.add(jButton1);
getContentPane().add(jPanel1, java.awt.BorderLayout.PAGE_END);
jPanel2.setLayout(new java.awt.BorderLayout());
jPanel3.setLayout(new java.awt.GridLayout(1, 0));
jSlider2.addChangeListener(new javax.swing.event.ChangeListener() {
public void stateChanged(javax.swing.event.ChangeEvent evt) {
jSlider2StateChanged(evt);
}
});
jPanel3.add(jSlider2);
jPanel2.add(jPanel3, java.awt.BorderLayout.PAGE_END);
jLabel1.setHorizontalAlignment(javax.swing.SwingConstants.CENTER);
jLabel1.addMouseListener(new java.awt.event.MouseAdapter() {
public void mouseClicked(java.awt.event.MouseEvent evt) {
jLabel1MouseClicked(evt);
}
});
javax.swing.GroupLayout jPanel4Layout = new javax.swing.GroupLayout(jPanel4);
jPanel4.setLayout(jPanel4Layout);
jPanel4Layout.setHorizontalGroup(
jPanel4Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGap(0, 400, Short.MAX_VALUE)
.addGroup(jPanel4Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(jPanel4Layout.createSequentialGroup()
.addGap(0, 200, Short.MAX_VALUE)
.addComponent(jLabel1)
.addGap(0, 200, Short.MAX_VALUE)))
);
jPanel4Layout.setVerticalGroup(
jPanel4Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGap(0, 251, Short.MAX_VALUE)
.addGroup(jPanel4Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(jPanel4Layout.createSequentialGroup()
.addGap(0, 125, Short.MAX_VALUE)
.addComponent(jLabel1)
.addGap(0, 126, Short.MAX_VALUE)))
);
jPanel2.add(jPanel4, java.awt.BorderLayout.CENTER);
getContentPane().add(jPanel2, java.awt.BorderLayout.CENTER);
pack();
}// </editor-fold>
private void jSlider2StateChanged(javax.swing.event.ChangeEvent evt) {
// TODO add your handling code here:
int val = ((JSlider) evt.getSource()).getValue();
setScale(val * .01f, val * .01f);
}
private void jLabel1MouseClicked(java.awt.event.MouseEvent evt) {
setCursor(java.awt.Cursor.getPredefinedCursor(java.awt.Cursor.CROSSHAIR_CURSOR));
p = evt.getPoint();
q = SwingUtilities.convertPoint(evt.getComponent(), p, this);
v.add(p);
v_scale.add(scaleX);
v_scale.add(scaleY);
double c = q.getX();
double d = q.getY();
String x1 = Double.toString(p.getX());
String x2 = Double.toString(p.getY());
Graphics g = this.getGraphics();
paint(g, (int) c, (int) d); // TODO add your handling code here:
}
private void jButton1ActionPerformed(java.awt.event.ActionEvent evt) {
System.out.println(p.getX() + " " + p.getY() + " " + q.getX() + " " + q.getY());
float sx=v_scale.remove(0);
float sy=v_scale.remove(0);
System.out.println(sx+" "+sy);
dispose();
// TODO add your handling code here:
}
public Vector<Point> first(ImageIcon icon) {
jLabel1.setIcon(icon);
return return_vector();
}
public void paint(Graphics g, int a, int b) {
g.setColor(Color.RED);
g.drawRect(a - 1, b - 1, 3, 3);
g.fillRect(a, b, 2, 2);
}
@Override
public Dimension getPreferredSize() {
int prefWidth;
prefWidth = (int) (jLabel1 == null ? 0 : jPanel4.getWidth() * scaleX);
int prefHeight;
prefHeight = (int) (jLabel1 == null ? 0 : jPanel4.getHeight() * scaleY);
return new Dimension(prefWidth, prefHeight);
}
public void paintComponent(Graphics g) {
if (jLabel1 == null) {
return;
}
int w = (int) (jLabel1.getWidth() * scaleX);
int h = (int) (jLabel1.getHeight() * scaleY);
int x = (getWidth() - w) / 2;
int y = (getHeight() - h) / 2;
ImageIcon img_icon=(ImageIcon) jLabel1.getIcon();
g.drawImage(img_icon.getImage(), x, y, w, h, null);
}
public void setScale(float x, float y) {
this.scaleX = x;
this.scaleY = y;
jLabel1.revalidate();
jLabel1.repaint();
}
public Vector<Point> return_vector() {
return this.v;
}
/**
* @param args the command line arguments
*/
public static void main(String args[]) {
try {
for (javax.swing.UIManager.LookAndFeelInfo info : javax.swing.UIManager.getInstalledLookAndFeels()) {
if ("Nimbus".equals(info.getName())) {
javax.swing.UIManager.setLookAndFeel(info.getClassName());
break;
}
}
} catch (ClassNotFoundException ex) {
java.util.logging.Logger.getLogger(TrialZoom.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
} catch (InstantiationException ex) {
java.util.logging.Logger.getLogger(TrialZoom.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
} catch (IllegalAccessException ex) {
java.util.logging.Logger.getLogger(TrialZoom.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
} catch (javax.swing.UnsupportedLookAndFeelException ex) {
java.util.logging.Logger.getLogger(TrialZoom.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
}
//</editor-fold>
/* Create and display the form */
java.awt.EventQueue.invokeLater(new Runnable() {
public void run() {
new TrialZoom().setVisible(true);
}
});
}
// Variables declaration - do not modify
private javax.swing.JButton jButton1;
private javax.swing.JLabel jLabel1;
private javax.swing.JPanel jPanel1;
private javax.swing.JPanel jPanel2;
private javax.swing.JPanel jPanel3;
private javax.swing.JPanel jPanel4;
private javax.swing.JSlider jSlider2;
// End of variables declaration
}