如何用鼠标侦听器制作一个矩形并将其添加到JFrame? [英] How to make a rectangle with mouse listeners and add them to JFrame?
问题描述
基本上，我想制作一个矩形，其中包含我的Tic TAC Toe游戏的鼠标侦听器.我打算将它们放在两行之间，以用作鼠标侦听器.我已经设置了一个JFrame，剩下的就是我要添加的矩形.我将如何去做呢?到目前为止，这是我的代码:
Basically, I want to make a rectangle that contains a mouse listener for my tic tac toe game. I intend to place them in between the lines to serve as mouse listeners. I have already set up a JFrame, all that is left is for me to add the rectangle. How would I go about doing this? Here is my code so far:
public class TicTacToe extends JFrame{
public static void main(String[] args) {
// TODO Auto-generated method stub
new TicTacToe();
}
public TicTacToe(){
//Sets up the frame
this.setTitle("Tic Tac Toe");
this.setPreferredSize(new Dimension(500,500));
this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
this.pack();
this.setVisible(true);
}
public void paint(Graphics g){
//This just creates the lines for my tic tac toe game.
g.clearRect(0, 0, getWidth(), getHeight());
g.setColor(Color.black);
Graphics2D g2 = (Graphics2D) g;
g2.setStroke(new BasicStroke(10));
//Vertical
g2.drawLine(this.getWidth()/3, this.getHeight()/10, this.getWidth()/3, this.getHeight()-this.getHeight()/10);
g2.drawLine(2*(this.getWidth()/3), this.getHeight()/10, 2*(this.getWidth()/3), this.getHeight()-this.getHeight()/10);
//Horizontal
g2.drawLine(this.getWidth()/25,this.getWidth()/3,this.getHeight()-this.getHeight()/25,this.getWidth()/3);
g2.drawLine(this.getWidth()/25,(this.getWidth()/3)*2,this.getHeight()-this.getHeight()/25,(this.getWidth()/3)*2);
validate();
}
推荐答案
您可以将绘画算法用作检查MouseEvent是否在给定区域内的基础，但这会给维护带来麻烦.
You could just use your painting algorithm as a bases for checking if the MouseEvent is within a given area, but this becomes a mess to maintain
相反，您可以利用Graphics2D形状API，该API允许您定义虚拟区域并仅使用其contains功能来测试MouseEvent是否在这些区域之一内
Instead, you could take advantage of Graphics2D shape API, which would allow you to define virtual areas and simply use it's contains functionality to test if the MouseEvent falls within one of those areas
(ps，您的线条图代码有些偏斜)
import java.awt.BasicStroke;
import java.awt.Color;
import java.awt.Dimension;
import java.awt.EventQueue;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.Rectangle;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.UIManager;
import javax.swing.UnsupportedLookAndFeelException;
public class TicTacToeDemo {
public static void main(String[] args) {
new TicTacToeDemo();
}
public TicTacToeDemo() {
EventQueue.invokeLater(new Runnable() {
@Override
public void run() {
try {
UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
} catch (ClassNotFoundException | InstantiationException | IllegalAccessException | UnsupportedLookAndFeelException ex) {
ex.printStackTrace();
}
JFrame frame = new JFrame("Testing");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.add(new TestPane());
frame.pack();
frame.setLocationRelativeTo(null);
frame.setVisible(true);
}
});
}
public class TestPane extends JPanel {
private List<Rectangle> quads;
private Rectangle selected;
public TestPane() {
quads = new ArrayList<>(9);
MouseAdapter ma = new MouseAdapter() {
@Override
public void mouseMoved(MouseEvent e) {
selected = null;
for (Rectangle cell : quads) {
if (cell.contains(e.getPoint())) {
selected = cell;
break;
}
}
repaint();
}
};
addMouseMotionListener(ma);
}
@Override
public Dimension getPreferredSize() {
return new Dimension(200, 200);
}
@Override
public void invalidate() {
// When ever the size of the container changes, we
// need to revalidate the rectangles based on the new size
// of the container
super.invalidate();
quads.clear();
int width = getWidth();
int height = getHeight();
if (width != 0 && height != 0) {
int vGap = getHeight() / 10;
int hGap = getWidth() / 15;
width -= hGap;
height -= vGap;
hGap /= 2;
vGap /= 2;
for (int xPos = 0; xPos < 3; xPos++) {
for (int yPos = 0; yPos < 3; yPos++) {
int x = hGap + (xPos * (width / 3));
int y = vGap + (yPos * (height / 3));
quads.add(new Rectangle(x, y, width / 3, height / 3));
}
}
}
}
protected void paintComponent(Graphics g) {
super.paintComponent(g);
Graphics2D g2d = (Graphics2D) g.create();
if (selected != null) {
g2d.setColor(new Color(0, 0, 255, 128));
g2d.fill(selected);
}
g2d.setColor(Color.black);
Graphics2D g2 = (Graphics2D) g2d;
g2.setStroke(new BasicStroke(10));
//Vertical
g2.drawLine(this.getWidth() / 3, this.getHeight() / 10, this.getWidth() / 3, this.getHeight() - this.getHeight() / 10);
g2.drawLine(2 * (this.getWidth() / 3), this.getHeight() / 10, 2 * (this.getWidth() / 3), this.getHeight() - this.getHeight() / 10);
//Horizontal
g2.drawLine(this.getWidth() / 25, this.getHeight() / 3, this.getWidth() - this.getWidth() / 25, this.getHeight() / 3);
g2.drawLine(this.getWidth() / 25, (this.getHeight() / 3) * 2, this.getWidth() - this.getWidth() / 25, (this.getHeight() / 3) * 2);
g2d.dispose();
}
}
}
看看 2D图形，
Have a look at 2D Graphics, Performing Custom Painting and Painting in AWT and Swing for more details
您可能还想看看为什么不直接在JFrame中绘制， Java AWT drawString()不在窗口上显示和
You might also want to have a look at Why not to draw directly inside JFrame, How to get the EXACT middle of a screen, even when re-sized, Java AWT drawString() does not display on window and How can I set in the midst? for reasons why you shouldn't override paint of a top level container like JFrame
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