swing在两个java图形之间画一条可移动的线
刺客通过一条线与气泡相连。例如,当我搬家的时候,吉米,我希望把吉米和他卖的水果连接起来的那条线能得到维护。我拖水果的时候也是一样
但不知怎么的,这是行不通的。当我拖动粘胶人或气泡时,线条变得脱节。
这里是我的代码,如果有人想尝试运行它。我试着只包括相关的东西
示例类
import java.awt.Dimension;
import java.awt.EventQueue;
import java.awt.Font;
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.event.MouseMotionAdapter;
import java.util.ArrayList;
import java.util.List;
import java.util.Random;
import javax.swing.JFrame;
import javax.swing.JPanel;
public class Example extends JPanel {
private static List<Person> persons;
private static List<Fruit> fruits;
private static List<LineTest> lines;
private Point mousePt;
private static Font setFont;
private Random randomGenerator;
private Person person;
private Fruit bubble;
private LineTest line;
private static final int W = 640;
private static final int H = 480;
public Example() {
persons = new ArrayList<Person>(); // Stores the person's names & coords
fruits = new ArrayList<Fruit>(); // Stores the person's name and what fruits he sells & coords
lines = new ArrayList<LineTest>(); // Stores the person's name, fruits he sells & coords
randomGenerator = new Random();
setFont = new Font("Sans Serif", Font.BOLD, 12);
String person1 = "Jimmy";
String person2 = "Sally";
person = new Person(person1, 50,50);
addPerson(person);
person = new Person(person2, 50,150);
addPerson(person);
String fruit1 = "Banana";
String fruit2 = "Apple";
String fruit3 = "Orange";
String fruit4 = "Watermelon";
String fruit5 = "Pineapple";
String fruit6 = "Grapes";
bubble = new Fruit(person1, fruit1, setFont, 150, 50);
addFruit(bubble);
bubble = new Fruit(person1, fruit2, setFont, 150, 100);
addFruit(bubble);
bubble = new Fruit(person1, fruit3, setFont, 150, 150);
addFruit(bubble);
bubble = new Fruit(person2, fruit4, setFont, 150, 200);
addFruit(bubble);
bubble = new Fruit(person2, fruit5, setFont, 150, 250);
addFruit(bubble);
bubble = new Fruit(person2, fruit6, setFont, 150, 300);
addFruit(bubble);
for (int i=0; i<persons.size();i++) {
for (int j=0; j<fruits.size();j++) {
// If the same person in the person's list can be found in the fruits list
// draw a line between the Person and the Fruit
if (persons.get(i).getPerson().equals((fruits.get(j).getPerson()))) {
int personX = persons.get(i).getCoorX();
int personY = persons.get(i).getCoorY();
int fruitX = fruits.get(j).getCoorX();
int fruitY = fruits.get(j).getCoorY();
line = new LineTest(persons.get(i).getPerson(), fruits.get(j).getFruit(), personX, personY, fruitX, fruitY);
addLine(line);
}
}
}
this.setFont(setFont);
this.addMouseListener(new MouseAdapter() {
@Override
public void mousePressed(MouseEvent e) {
mousePt = e.getPoint();
for (Person p:persons) {
p.select(mousePt.x, mousePt.y);
}
for (Fruit f:fruits) {
f.select(mousePt.x, mousePt.y);
}
}
public void mouseReleased(MouseEvent e) {
for (Person p:persons) {
p.unselect();
}
for(Fruit f:fruits) {
f.unselect();
}
}
});
this.addMouseMotionListener(new MouseMotionAdapter() {
@Override
public void mouseDragged(MouseEvent e) {
mousePt = e.getPoint();
for (Person s:persons) {
s.move(mousePt.x, mousePt.y);
int personX = mousePt.x;
int personY = mousePt.y;
for(int k=0; k<lines.size(); k++) {
// If the same person in the person's list can be found in the fruits list
// move the point on the Person to a new coords
if(s.person.equals(lines.get(k).person)) {
lines.get(k).move(personX, personY);
}
}
}
for(Fruit f:fruits) {
f.move(mousePt.x, mousePt.y);
int fruitX = mousePt.x;
int fruitY = mousePt.y;
for(int k=0; k<lines.size(); k++) {
if(f.person.equals(lines.get(k).person)) {
lines.get(k).move(fruitX, fruitY);
}
}
}
repaint();
}
});
}
public void addPerson(Person person) {
persons.add(person);
repaint();
}
public void addFruit (Fruit fruit) {
fruits.add(fruit);
repaint();
}
public void addLine(LineTest line) {
lines.add(line);
repaint();
}
@Override
public void paintComponent(Graphics g) {
super.paintComponent(g);
Graphics2D g2 = (Graphics2D)g.create();
for (Person p:persons) {
p.paint(g2);
}
for (LineTest l:lines) {
l.paint(g2);
}
for (Fruit f:fruits) {
f.paint(g2);
}
}
@Override
public Dimension getPreferredSize() {
return new Dimension(W, H);
}
public static void main(String[] args) {
EventQueue.invokeLater(new Runnable() {
@Override
public void run() {
JFrame f = new JFrame();
f.add(new Example());
f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
f.pack();
f.setLocationRelativeTo(null);
f.setVisible(true);
}
});
}
}
个人类
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.Rectangle;
import java.awt.RenderingHints;
public class Person extends Rectangle {
String person;
int x,y;
int tx, ty;
boolean isSelected = false;
public Person(String person, int x, int y) {
this.person = person;
this.x = x;
this.y = y;
this.setBounds(x-10,y-10,40,90);
isSelected = true;
move(x, y);
isSelected = false;
}
public void select(int x, int y){
if(this.contains(x,y)) {
isSelected=true;
}
}
public void unselect(){
isSelected = false;
}
public void move(int x, int y) {
if(isSelected) {
LineTest.isPersonMoved = true;
LineTest.isFruitMoved = false;
tx = x;
ty= y;
this.translate(tx-this.x, ty-this.y);
this.x = tx;
this.y = ty;
}
}
public void paint(Graphics g) {
Graphics2D g2 = (Graphics2D)g.create();
g2.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);
g2.drawOval(x, y, 20, 20); // head
g2.drawLine(x+10,y+20,x+10,y+50); // body
g2.drawLine(x+10,y+20,x+25,y+40); // right hand
g2.drawLine(x+10,y+20,x-5,y+40); // left hand
g2.drawLine(x+10,y+50,x-5,y+70); // left leg
g2.drawLine(x+10,y+50,x+25,y+70); // right leg
g2.drawString(person, tx-15, ty+85);
}
public String getPerson() {
return person;
}
public int getCoorX() {
return x;
}
public int getCoorY() {
return y;
}
}
水果类
import java.awt.Color;
import java.awt.Font;
import java.awt.FontMetrics;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.Rectangle;
import java.awt.RenderingHints;
public class Fruit extends Rectangle {
private static final long serialVersionUID = 1L;
String fruit, person;
Font _font;
int x, y, tx, ty;
public static int height, width, ovalWidth, ovalHeight;
boolean isSelected;
public static FontMetrics getMetrics;
public static Graphics2D g2;
public Fruit(String person, String fruit, Font font, int x, int y) {
this.person = person;
this.fruit = fruit;
this._font = font;
this.x = x;
this.y = y;
this.setBounds(x, y, ovalWidth, ovalHeight);
isSelected = true;
move(x, y);
isSelected = false;
}
public void select(int x, int y){
if(this.contains(x,y)) {
isSelected=true;
}
}
public void unselect(){
isSelected = false;
}
public void move(int x, int y) {
if(isSelected) {
LineTest.isPersonMoved = false;
LineTest.isFruitMoved = true;
tx = x;
ty= y;
this.translate(tx-this.x, ty-this.y);
this.x = tx;
this.y = ty;
}
}
public void paint(Graphics g) {
g2 = (Graphics2D) g.create();
g2.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);
getMetrics = g2.getFontMetrics(_font);
height = getMetrics.getHeight();
width = getMetrics.stringWidth(fruit);
ovalWidth = width+25;
ovalHeight = height+25;
g2.setColor(Color.WHITE);
g2.fillOval(x, y, ovalWidth, ovalHeight);
g2.setColor(Color.BLACK);
g2.drawOval(x, y, ovalWidth, ovalHeight);
int centreX = x + ovalWidth/2;
int centreY = y + ovalHeight/2;
g2.drawString(fruit, (int) (centreX - width/2), (int) (centreY + height/4));
this.setBounds(x, y, ovalWidth, ovalHeight);
}
public String getPerson() {
return person;
}
public String getFruit() {
return fruit;
}
public int getCoorX() {
return x;
}
public int getCoorY() {
return y;
}
}
线路测试类
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.Point;
import java.awt.RenderingHints;
/*
* Draw line that connect between Person and Fruit
*/
public class LineTest {
int x1, y1, x2, y2, tx, ty;
String fruit, person;
public static boolean isPersonMoved, isFruitMoved;
public LineTest(String person, String fruit, int x1, int y1, int x2, int y2) {
this.person = person;
this.fruit = fruit;
// Get x, y coordinates from person bound
this.x1 = x1+35;
this.y1 = y1+35;
// Get x, y coordinates from fruit bound
this.x2 = x2+30;
this.y2 = y2+30;
}
public void move(int x, int y) {
if (isPersonMoved) {
System.out.println("LineTest - isPersonMoved: " + isPersonMoved);
tx = x;
ty = y;
this.x1 = tx+35;
this.y1 = ty+35;
} else if (isFruitMoved) {
System.out.println("LineTest - isFruitMoved: " + isFruitMoved);
tx = x;
ty = y;
this.x2 = tx+30;
this.y2 = ty+30;
}
}
public void paint(Graphics g) {
Graphics2D g2d = (Graphics2D)g.create();
g2d.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);
g2d.drawLine(x1, y1, x2, y2);
}
public String getPerson() {
return person;
}
public String getFruit() {
return fruit;
}
public Point getFstCoor() {
return new Point (x1, y1);
}
public Point getSndCoor() {
return new Point(x2, y2);
}
}
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