Я новичок в настольных графических приложениях Java Swing. У меня возникла проблема. Пожалуйста, предложите мне выбрать некоторые из прямоугольников и заполнить прямоугольники. Есть ли у нас какая-либо предопределенная концепция, например, резиновая лента, если таковая имеется, пожалуйста, предложите мне начать рисунок.
import java.awt.AlphaComposite;
import java.awt.BasicStroke;
import java.awt.Color;
import java.awt.Container;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.Point;
import java.awt.Rectangle;
import java.awt.Stroke;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import java.awt.event.MouseMotionListener;
import java.util.ArrayList;
import javax.swing.JFrame;
import javax.swing.JPanel;
@SuppressWarnings("serial")
public class Exam extends JPanel implements MouseMotionListener {
private static final int recW = 50;
private static final int MAX = 100;
private Rectangle[] rect = new Rectangle[MAX];
private int numOfRecs = 0;
private int currentSquareIndex = -1;
private Point startPoint = new Point();
private Point currentPoint = new Point();
private int x, y, width, height;
private Stroke dashedStroke = new BasicStroke(0.0f, BasicStroke.CAP_ROUND,
BasicStroke.CAP_SQUARE, 5.0f, new float[] { 5f, 5f, 5f, 5f }, 5.0f);
ArrayList list = new ArrayList();
public Exam() {
addRect(50, 50);
addRect(100, 50);
addRect(150, 50);
addRect(200, 50);
addRect(250, 50);
addRect(300, 50);
addRect(350, 50);
addRect(400, 50);
addRect(450, 50);
addRect(500, 50);
//
addRect(50, 100);
addRect(100, 100);
addRect(150, 100);
addRect(200, 100);
addRect(250, 100);
addRect(300, 100);
addRect(350, 100);
addRect(400, 100);
addRect(450, 100);
addRect(500, 100);
//
addRect(50, 150);
addRect(100, 150);
addRect(150, 150);
addRect(200, 150);
addRect(250, 150);
addRect(300, 150);
addRect(350, 150);
addRect(400, 150);
addRect(450, 150);
addRect(500, 150);
//
addRect(50, 200);
addRect(100, 200);
addRect(150, 200);
addRect(200, 200);
addRect(250, 200);
addRect(300, 200);
addRect(350, 200);
addRect(400, 200);
addRect(450, 200);
addRect(500, 200);
addMouseListener(new MouseAdapter() {
@Override
public void mousePressed(MouseEvent evt) {
startPoint = evt.getPoint();
}
public void mouseReleased(MouseEvent e) {
System.out.println(" mouseReleased is " + e.getX() + " y i s "
+ e.getY());
Graphics g = getGraphics();
Graphics2D g2 = (Graphics2D) g;
g2.setComposite(AlphaComposite.SrcOver.derive(0.8f));
Color myColour = new Color(255, 0, 0);
g.setColor(myColour);
x = Math.min(startPoint.x, currentPoint.x);
y = Math.min(startPoint.y, currentPoint.y);
width = Math.abs(startPoint.x - currentPoint.x);
height = Math.abs(startPoint.y - currentPoint.y);
rect[numOfRecs] = new Rectangle(x, y, width, height);
// System.out.println("list size is:"+list.size());
Rectangle ggg=new Rectangle(x, y, width, height);
for(Rectangle rect3d: rect){
if(ggg.intersects(rect3d)){
g2.fill(rect3d);
}
else
System.out.println("doesn't contains");
}
repaint();
}
});
addMouseMotionListener(this);
}
@Override
public void paintComponent(Graphics g) {
super.paintComponent(g);
for (int i = 0; i < numOfRecs; i++) {
((Graphics2D) g).draw(rect[i]);
list.add(rect[i]);
}
x = Math.min(startPoint.x, currentPoint.x);
y = Math.min(startPoint.y, currentPoint.y);
width = Math.abs(startPoint.x - currentPoint.x);
height = Math.abs(startPoint.y - currentPoint.y);
((Graphics2D) g).setStroke(dashedStroke);
g.setColor(Color.BLACK);
g.drawRect(x, y, width, height);
// Rectangle dashedRec=new Rectangle(x, y, width, height);
}
public void addRect(int x, int y) {
if (numOfRecs < MAX) {
rect[numOfRecs] = new Rectangle(x, y, recW, recW);
currentSquareIndex = numOfRecs;
numOfRecs++;
repaint();
}
}
@Override
public void mouseMoved(MouseEvent event) {
}
@Override
public void mouseDragged(MouseEvent event) {
currentPoint = event.getPoint();
repaint();
}
public static void main(String[] args) {
JFrame jFrame = new JFrame();
jFrame.setTitle("");
jFrame.setSize(600, 300);
Container cPane = jFrame.getContentPane();
cPane.add(new Exam());
jFrame.setVisible(true);
}
}
