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import java.awt.BorderLayout;
import java.awt.Container;
import java.awt.Cursor;
import java.awt.Color;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.GridLayout;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import java.awt.event.MouseMotionAdapter;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
import java.awt.geom.Rectangle2D;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
public class Rect extends JFrame {
DrawingCanvas canvas;
JLabel location;
public Rect() {
super();
Container container = getContentPane();
canvas = new DrawingCanvas();
container.add(canvas);
JPanel panel = new JPanel();
panel.setLayout(new GridLayout(1, 2));
panel.add(new JLabel("x,y: ", JLabel.RIGHT));
location = new JLabel("");
panel.add(location);
container.add(panel, BorderLayout.SOUTH);
addWindowListener(new WindowAdapter() {
public void windowClosing(WindowEvent e) {
System.exit(0);
}
});
setSize(600,600);
setVisible(true);
}
class DrawingCanvas extends JPanel {
double x, y, w, h;
int x1, y1, x2, y2;
Rectangle2D rect;
Cursor curCursor;
public DrawingCanvas() {
x = 20;
y = 20;
w = 100;
h = 100;
addMouseListener(new MyMouseListener());
addMouseMotionListener(new MyMouseMotionListener());
}
public void paint(Graphics g) {
Graphics2D g2D = (Graphics2D) g;
setBackground(new Color(236, 233, 216));
rect = new Rectangle2D.Double(x, y, w, h);
g2D.draw(rect);
if (curCursor != null)
setCursor(curCursor);
}
class MyMouseListener extends MouseAdapter {
public void mousePressed(MouseEvent e) {
x1 = e.getX();
y1 = e.getY();
canvas.repaint();
}
}
class MyMouseMotionListener extends MouseMotionAdapter {
public void mouseDragged(MouseEvent e) {
if (rect.contains(e.getX(), e.getY())) {
x2 = e.getX();
y2 = e.getY();
x = x + x2 - x1;
y = y + y2 - y1;
x1 = x2;
y1 = y2;
}
canvas.repaint();
}
public void mouseMoved(MouseEvent e) {
if (rect != null) {
if (rect.contains(e.getX(), e.getY())) {
curCursor = Cursor
.getPredefinedCursor(Cursor.HAND_CURSOR);
} else {
curCursor = Cursor.getDefaultCursor();
}
}
canvas.repaint();
}
}
}
} |
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