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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