文章目录

• 1、效果
• 2、chess.cpp
• 3、chess.h

1、效果

2、chess.cpp

#include "chess.h"

Chess::Chess(QWidget *parent)
    : QWidget(parent)
{
    Init();
}

Chess::~Chess()
{

}

//-----------events-------------
//画背景 绘图事件里
void Chess::paintEvent(QPaintEvent *){
      QPainter painter(this);//画家
    //方式一：用画家画矩形的方式
//    QRect rec;
//    rec.setTopLeft(QPoint(0,0));
//    rec.setBottomRight(QPoint(this->width(),this->height()));
//    QPixmap pix("../png/2.jpg");
//    bool ret;
//        ret=pix.load("../png/2.jpg");
//    if(ret==true)
//       painter.drawPixmap(rec,pix);

    //方式二：直接使用构造函数
      QRect rec(QPoint(0,0),QPoint(this->width(),this->height()));//定义矩形
      QPixmap pix(bgFilename);
      qDebug()<<bgFilename<<endl;
      painter.drawPixmap(rec,pix);

    //画线
    QPen pen1;
    pen1.setStyle(lineStyle);
    pen1.setColor(lineColor);
    pen1.setWidth(lineWidth);
    painter.setPen(pen1);//笔交给画家
    for(int i=0;i<=8;i++){
        //x
        //painter.drawLine(startx,starty,9*gridwidth,starty);
        painter.drawLine(startx,starty+i*gridheight,9*gridwidth,starty+i*gridheight);//起点 终点坐标

        //y
        //painter.drawLine(startx,starty,startx,starty+8*gridheight);
        painter.drawLine(startx+i*gridwidth,starty,startx+i*gridwidth,starty+8*gridheight);
    }

    //画棋子
    QString chessFilename;
    for(int i=0;i<8;i++){
        for(int j=0;j<8;j++){
            //painter.drawPixmap(startx,starty,gridwidth,gridheight,QPixmap("../png/black.gif"));
            if(chessData[i][j]==White){
                chessFilename = "../png/white.png";//画白色
            }
            else if (chessData[i][j]==Black) {
               chessFilename = "../png/black.gif";//画黑色
            }
            else {
                chessFilename.clear();
                continue;
            }
            painter.drawPixmap(startx+i*gridwidth,starty+j*gridheight,gridwidth,gridheight,QPixmap(chessFilename));
        }
    }
}

//窗体改变立马赋值
void Chess::resizeEvent(QResizeEvent *event){
    gridwidth = event->size().width()/GRIDCOLINT;
    gridheight =event->size().height()/GRIDCOLINT;
    startx = gridwidth;
    starty = gridheight;
    qDebug()<<"x::"<<startx<<"y::"<<starty;
}

//鼠标按下事件
void Chess::mousePressEvent(QMouseEvent *event){
    int x=event->x();
    int y=event->y();


    if(x>=startx && (x<=startx+8*gridwidth)){      //x的有效范围
        if(y>=starty && (y<=starty+8*gridheight)){ //y的有效范围
        //确定当前坐标属于哪个格子
        int i=0,j=0;
        i = (x-startx)/gridwidth;
        j = (y-starty)/gridheight;
        qDebug()<<"i:"<<i<<"j"<<j<<endl;
        chessData[i][j] = Black;
        this->update();//刷新
        }
    }
}


//-----------end event----------
void Chess::Init(){
    bgFilename.clear();
    bgFilename = "../png/2.jpg";

    //线的默认值
    lineColor = Qt::red;
    lineStyle = Qt::SolidLine;
    lineWidth = 3;

    //初始化棋子数据
    memset(chessData,0,sizeof(int)*64);
    chessData[3][3]=Black;chessData[4][4]=Black;
    chessData[4][3]=White;chessData[3][4]=White;

}
//-----------function-----------
//提供方法，供外部改变背景
void Chess::ChangeBackgroundImage(const QString filename){
    this->bgFilename=filename;
}

//提供方法，供外部改变线颜色、类型、宽度
void Chess::ChangeLine(const QColor color, Qt::PenStyle style, const int width){
    this->lineColor = color;
    this->lineStyle = style;
    this->lineWidth = width;
}

//-----------end function-------

3、chess.h

#ifndef CHESS_H
#define CHESS_H

#include <QWidget>
#include <QPainter>
#include <QPen>
#include <QDebug>
#include <QResizeEvent>
#include <QMouseEvent>
#define GRIDCOLINT 10
class Chess : public QWidget
{
    Q_OBJECT

public:
    Chess(QWidget *parent = 0);
    ~Chess();

    //棋子类型
    enum ChessType{Empyty = 0,White,Black};//空，白，黑
    //保存棋子数据
    int chessData[8][8];

    void ChangeBackgroundImage(const QString filename); //提供方法，供外部改变背景
    void ChangeLine(const QColor color,Qt::PenStyle style,const int width);//提供方法，供外部改变线颜色\类型\宽度

protected:
    void paintEvent(QPaintEvent *);//绘图事件
    void resizeEvent(QResizeEvent *event);
    void mousePressEvent(QMouseEvent *);//鼠标按下事件
private:
    QString bgFilename;
    QColor lineColor;
    Qt::PenStyle lineStyle;
    int lineWidth;
    int gridwidth,gridheight,startx,starty;//格子宽高，划线起始点
    void Init();

};

#endif // CHESS_H

标签：startx,starty,落子,int,void,gridwidth,普通,Chess
来源： https://blog.csdn.net/oDuanYanGuHong/article/details/122609405