我希望将鼠标侦听器添加到矩形中,以便当用户单击一个矩形并将鼠标拖动到下一个矩形时,将绘制一条线来跟踪用户移动,并且用户所在的当前矩形也必须更改颜色。我是java新手,因此我们非常感谢您的帮助。
import java.awt.Color;
import java.awt.Font;
import java.awt.Rectangle;
import java.awt.Graphics;
import java.awt.event.MouseEvent;
import java.awt.event.MouseListener;
import javax.swing.BorderFactory;
import javax.swing.JPanel;
public class SundayPanel extends JPanel implements MouseListener{
private Rectangle rec;
private JPanel p = new JPanel();
private Graphics graphic;
public SundayPanel()
{
setSize(1000, 150);
setBackground(Color.white);
setBorder(BorderFactory.createEtchedBorder(Color.orange, Color.red));
rec = new Rectangle(0, 0, 130, 100);
}
public void paint(Graphics g)
{
Font font = new Font("Times New Roman", Font.PLAIN, 72);
g.setFont(font);
g.setColor(Color.black);
//g.draw(rec);
g.draw3DRect(0, 0, 130, 100, true);
g.drawString("1", 50, 65);
g.draw3DRect(130, 0, 130, 100, true);
g.drawString("2", 180, 65);
g.draw3DRect(260, 0, 130, 100, true);
g.drawString("3", 300, 65);
g.draw3DRect(390, 0, 130, 100, true);
g.drawString("4", 430, 65);
g.draw3DRect(520, 0, 130, 100, true);
g.drawString("5", 550, 65);
g.draw3DRect(650, 0, 130, 100, true);
g.drawString("6", 700, 65);
g.draw3DRect(780, 0, 130, 100, true);
g.drawString("7", 820, 65);
g.draw3DRect(910, 0, 130, 100, true);
g.drawString("8", 950, 65);
g.draw3DRect(1040, 0, 130, 100, true);
g.drawString("9", 1080, 65);
g.draw3DRect(1170, 0, 130, 100, true);
g.drawString("10", 1200, 65);
}
}
import javax.swing.JFrame;
public class SundayMain extends JFrame{
/**
* @param args
*/
public static void main(String[] args) {
JFrame sunFrame = new SundayFrame("Sunday Today");
sunFrame.setVisible(true);
sunFrame.setSize(1330, 150);
sunFrame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
}
}
import java.awt.BorderLayout;
import javax.swing.JFrame;
public class SundayFrame extends JFrame{
private SundayPanel sunPanel;
public SundayFrame(String title)
{
super(title);
sunPanel = new SundayPanel();
add(sunPanel, BorderLayout.CENTER);
}
}
答案 0 :(得分:1)
我修改了你的例子来绘制线条(按下按钮,移动鼠标,释放按钮)。
代码是可编译的,可以在一个SundayPanel.java
文件中执行。
可能它将帮助您实现您的确切目标:
注意:小心 - 代码非常难看。
public class SundayPanel extends JPanel implements MouseMotionListener, MouseListener {
public SundayPanel() {
setSize(1000, 150);
setBackground(Color.white);
setBorder(BorderFactory.createEtchedBorder(Color.orange, Color.red));
}
String[] values = new String[]{"1", "2", "3", "4", "5", "6", "7", "8", "9", "10"};
public void paint(Graphics g) {
Font font = new Font("Times New Roman", Font.PLAIN, 72);
g.setFont(font);
for (int i = 0; i < 10; i++) {
int step = 130 * i;
if ((start != null) && ((int) (end.getX() / 130) == i)) {
g.setColor(Color.orange);
} else {
g.setColor(Color.gray);
}
g.fill3DRect(step, 0, 130, 100, true);
g.setColor(Color.black);
g.drawString(values[i], 50 + step, 65);
}
if ((start != null) && (end != null)) {
g.drawLine((int) start.getX(), (int) start.getY(), (int) end.getX(), (int) end.getY());
}
}
Point start;
Point end;
@Override
public void mouseClicked(MouseEvent e) {
}
@Override
public void mousePressed(MouseEvent e) {
start = e.getPoint();
}
@Override
public void mouseDragged(MouseEvent e) {
end = e.getPoint();
e.getComponent().repaint();
}
@Override
public void mouseReleased(MouseEvent e) {
int from = (int) (start.getX() / 130);
int to = (int) (end.getX() / 130);
String tmp = values[from];
values[from] = values[to];
values[to] = tmp;
start = end = null;
e.getComponent().repaint();
}
@Override
public void mouseEntered(MouseEvent e) {
}
@Override
public void mouseExited(MouseEvent e) {
}
@Override
public void mouseMoved(MouseEvent e) {
}
}
class SundayMain extends JFrame {
/**
* @param args
*/
public static void main(String[] args) {
JFrame sunFrame = new SundayFrame("Sunday Today");
sunFrame.setVisible(true);
sunFrame.setSize(1330, 150);
sunFrame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
}
}
class SundayFrame extends JFrame {
private SundayPanel sunPanel;
public SundayFrame(String title) {
super(title);
sunPanel = new SundayPanel();
sunPanel.addMouseListener(sunPanel);
sunPanel.addMouseMotionListener(sunPanel);
add(sunPanel, BorderLayout.CENTER);
}
}