Java实现两人五子棋游戏(四) 落子动作的实现

之前的两篇文章：Java实现两人五子棋游戏(二) 画出棋盘；Java实现两人五子棋游戏(三) 画出棋子

前面，我们已经画好的棋盘和棋子，接下来，我们要通过鼠标点击屏幕获取落子位置并落子（先不考虑行棋方和胜负判断）。

步骤：

1）捕捉鼠标按下的位置

2）经过坐标变换（由像素位置->0-19的棋盘位置）

3）更新记录棋盘状态的二维数组

4）重新渲染绘制棋盘。

-------------落子动作代码示例如下--------------

一个棋子类Chessman.java

package xchen.test.simpleGobang; 

public class Chessman {
 private int color;//1-white，0-black
 private boolean placed = false; 

 public Chessman(int color,boolean placed){
 this.color=color;
 this.placed=placed;
 } 

 public boolean getPlaced() {
 return placed;
 } 

 public void setPlaced(boolean placed) {
 this.placed = placed;
 } 

 public int getColor() {
 return color;
 } 

 public void setColor(int color) {
 this.color = color;
 }
}

DrawChessBoard.java

package xchen.test.simpleGobang; 

import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.RadialGradientPaint;
import java.awt.Image;
import java.awt.Toolkit;
import java.awt.event.MouseEvent;
import java.awt.event.MouseListener;
import java.awt.Color;
import javax.swing.JPanel; 

public class DrawChessBoard extends JPanel implements MouseListener{
 final static int BLACK=0;
 final static int WHITE=1;
 public int chessColor = BLACK;
 int chessman_width=30; 

 public Image boardImg;
 final private int ROWS = 19;
 Chessman[][] chessStatus=new Chessman[ROWS+1][ROWS+1]; 

 public DrawChessBoard() {
 boardImg = Toolkit.getDefaultToolkit().getImage("res/drawable/chessboard2.png");
 if(boardImg == null)
  System.err.println("png do not exist"); 

 addMouseListener(this);
 }
 @Override
 protected void paintComponent(Graphics g) {
 // TODO Auto-generated method stub
 System.out.println("DRAW!!");
 super.paintComponent(g); 

 int imgWidth = boardImg.getHeight(this);
 int imgHeight = boardImg.getWidth(this);
 int FWidth = getWidth();
 int FHeight= getHeight(); 

 int x=(FWidth-imgWidth)/2;
 int y=(FHeight-imgHeight)/2; 

 int span_x=imgWidth/ROWS;
 int span_y=imgHeight/ROWS; 

 g.drawImage(boardImg, x, y, null); 

 //画横线
 for(int i=0;i<ROWS;i++)
 {
  g.drawLine(x, y+i*span_y, FWidth-x,y+i*span_y);
 }
 //画竖线
 for(int i=0;i<ROWS;i++)
 {
  g.drawLine(x+i*span_x, y, x+i*span_x,FHeight-y);
 } 

 //画棋子
 for(int i=0;i<ROWS+1;i++)
 {
  for(int j=0;j<ROWS+1;j++)
  {
  if(chessStatus[i][j]!=null&&chessStatus[i][j].getPlaced()==true)
  {
   System.out.println("draw chessman "+i+" "+j);
   int pos_x=x+i*span_x;
   int pos_y=y+j*span_y;
   float radius_b=40;
   float radius_w=80;
   float[] fractions = new float[]{0f,1f};
   java.awt.Color[] colors_b = new java.awt.Color[]{Color.BLACK,Color.WHITE};
   Color[] colors_w = new Color[]{Color.WHITE,Color.BLACK};
   RadialGradientPaint paint;
   if(chessStatus[i][j].getColor()==1)
   {
   System.out.println("draw white chess");
   paint = new RadialGradientPaint(pos_x-chessman_width/2f, pos_y-chessman_width/2f, radius_w*2, fractions, colors_w);
   }else{
   System.out.println("draw black chess");
   paint = new RadialGradientPaint(pos_x-chessman_width/2f, pos_y-chessman_width/2f, radius_b*2, fractions, colors_b);
   }
   ((Graphics2D)g).setPaint(paint); 

   ((Graphics2D)g).fillOval(pos_x-chessman_width/2,pos_y-chessman_width/2,chessman_width,chessman_width);
  }
  }
 }
 } 

 @Override
 //当用户按下鼠标按钮时发生
 public void mousePressed(MouseEvent e) {
 int point_x=e.getX();
 int point_y=e.getY(); 

 int imgWidth = boardImg.getHeight(this);
 int imgHeight = boardImg.getWidth(this);
 int FWidth = getWidth();
 int FHeight= getHeight(); 

 int x=(FWidth-imgWidth)/2;
 int y=(FHeight-imgHeight)/2; 

 int span_x=imgWidth/ROWS;
 int span_y=imgHeight/ROWS; 

 System.out.println("press");
 int status_x = 0;
 int status_y = 0;
 if(point_x>=x && point_x<=x+imgWidth && point_y>=y && point_y <= y+imgHeight)
 {
  System.out.println("合法");
  for(int i=0;i<ROWS+1;i++)
  {
  if(point_x>=x-chessman_width/2+1+i*span_x)
  {
   if(point_x<=x+chessman_width/2-1+i*span_x)//如果是width/2会在中间点出现两个匹配值
   {
   System.out.println("point x "+i+" "+point_x+" "+(x-chessman_width/2+i*span_x)+" "+(x+chessman_width/2+i*span_x));
   status_x = i;
   }
  }
  }
  for(int i=0;i<ROWS+1;i++)
  {
  if(point_y>=y-chessman_width/2+1+i*span_y)
  {
   if(point_y <= y+chessman_width/2-1+i*span_y)
   {
   System.out.println("point y "+i+" "+point_y+" "+(y-chessman_width/2+1+i*span_y)+" "+(y+chessman_width/2-1+i*span_y));
   status_y = i;
   }
  }
  }
  Chessman chessman = new Chessman(BLACK, true);
  chessStatus[status_x][status_y]=chessman;
  repaint();
 }
 System.out.println(status_x+" "+status_y+" "+chessStatus[status_x][status_y].getColor()+" "+chessStatus[status_x][status_y].getPlaced());
 }
 @Override
 //当用户按下并松开鼠标按钮时发生
 public void mouseClicked(MouseEvent e) {
 // TODO Auto-generated method stub
 }
 @Override
 public void mouseReleased(MouseEvent e) {
 // TODO Auto-generated method stub 

 }
 @Override
 public void mouseEntered(MouseEvent e) {
 // TODO Auto-generated method stub 

 }
 @Override
 public void mouseExited(MouseEvent e) {
 // TODO Auto-generated method stub
 }
}

主模块代码不变

package xchen.test.simpleGobang; 

import java.awt.Container;
import javax.swing.JFrame; 

import xchen.test.simpleGobang.DrawChessBoard; 

public class Main extends JFrame{
 private DrawChessBoard drawChessBoard;
 public Main() {
 drawChessBoard = new DrawChessBoard(); 

 //Frame标题
 setTitle("单机五子棋"); 

 Container containerPane =getContentPane();
 containerPane.add(drawChessBoard);
 }
 public static void main(String[] args) {
 Main m = new Main();
 m.setSize(800, 800);
 m.setVisible(true);
 }
}

运行一下

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