Java实现一个简单的两人五子棋游戏(四) 落子动作的实现

1）选择棋子

目标

2）画棋子

✔️

3）判断胜负

4）交换行棋方

 

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-blackprivate 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);}@Overrideprotected void paintComponent(Graphics g) {// TODO Auto-generated method stubSystem.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}@Overridepublic void mouseReleased(MouseEvent e) {// TODO Auto-generated method stub}@Overridepublic void mouseEntered(MouseEvent e) {// TODO Auto-generated method stub}@Overridepublic 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