Mega Code Archive
Resize a shape
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import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.Point;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import java.awt.geom.Rectangle2D;
import javax.swing.JFrame;
import javax.swing.JPanel;
public class ResizeRectangle extends JPanel {
private int SIZE = 8;
private Rectangle2D[] points = { new Rectangle2D.Double(50, 50,SIZE, SIZE), new Rectangle2D.Double(150, 100,SIZE, SIZE) };
Rectangle2D s = new Rectangle2D.Double();
ShapeResizeHandler ada = new ShapeResizeHandler();
public ResizeRectangle() {
addMouseListener(ada);
addMouseMotionListener(ada);
}
public void paintComponent(Graphics g) {
super.paintComponent(g);
Graphics2D g2 = (Graphics2D) g;
for (int i = 0; i < points.length; i++) {
g2.fill(points[i]);
}
s.setRect(points[0].getCenterX(), points[0].getCenterY(),
Math.abs(points[1].getCenterX()-points[0].getCenterX()),
Math.abs(points[1].getCenterY()- points[0].getCenterY()));
g2.draw(s);
}
class ShapeResizeHandler extends MouseAdapter {
Rectangle2D r = new Rectangle2D.Double(0,0,SIZE,SIZE);
private int pos = -1;
public void mousePressed(MouseEvent event) {
Point p = event.getPoint();
for (int i = 0; i < points.length; i++) {
if (points[i].contains(p)) {
pos = i;
return;
}
}
}
public void mouseReleased(MouseEvent event) {
pos = -1;
}
public void mouseDragged(MouseEvent event) {
if (pos == -1)
return;
points[pos].setRect(event.getPoint().x,event.getPoint().y,points[pos].getWidth(),
points[pos].getHeight());
repaint();
}
}
public static void main(String[] args) {
JFrame frame = new JFrame("Resize Rectangle");
frame.add(new ResizeRectangle());
frame.setSize(300, 300);
frame.setLocationRelativeTo(null);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setVisible(true);
}
}
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