之前的兩篇文章：java實現兩人五子棋游戲(二) 畫出棋盤；java實現兩人五子棋游戲(三) 畫出棋子
前面，我們已經畫好的棋盤和棋子，接下來，我們要通過鼠標點擊屏幕獲取落子位置并落子（先不考慮行棋方和勝負判斷）。
步驟：
1）捕捉鼠標按下的位置
2）經過坐標變換（由像素位置->0-19的棋盤位置）
3）更新記錄棋盤狀態的二維數組
4）重新渲染繪制棋盤。
-------------落子動作代碼示例如下--------------
一個棋子類chessman.java
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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
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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); //畫橫線 for(int i=0;i<rows;i++) { g.drawline(x, y+i*span_y, fwidth-x,y+i*span_y); } //畫豎線 for(int i=0;i<rows;i++) { g.drawline(x+i*span_x, y, x+i*span_x,fheight-y); } //畫棋子 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 //當用戶按下鼠標按鈕時發生 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會在中間點出現兩個匹配值 { 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 //當用戶按下并松開鼠標按鈕時發生 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 } } |
主模塊代碼不變
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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標題 container containerpane =getcontentpane(); containerpane.add(drawchessboard); } public static void main(string[] args) { main m = new main(); m.setsize(800, 800); m.setvisible(true); } } |
運行一下
以上就是本文的全部內容，希望對大家的學習有所幫助，也希望大家多多支持服務器之家。
原文鏈接：https://blog.csdn.net/v_xchen_v/article/details/53438858
