自定义QT widget

可以点击圆环里面的小圆形，选中的为当前的位置

#include "samplestatuswidget.h"

#define MY_PI 3.14159265358979323846

const QColor SampleStatusWidget::scolor[STATE_NUM]={QColor(255,255,255),QColor(0,255,0),QColor(170,0,127),QColor(170,0,255)};

const QColor SampleStatusWidget::tcolor[TYPE_NUM]={QColor(Qt::white),QColor(Qt::green),QColor(Qt::red),QColor(Qt::magenta), QColor(Qt::yellow),QColor(Qt::gray)};

SampleStatusWidget::SampleStatusWidget(QWidget *parent) : QWidget(parent)

{

    for(int i=0;i<40;i++)

    {

        m_status[i].s=state(i%STATE_NUM);//STATE_IDLE;

        m_status[i].t=type(i%TYPE_NUM);//TYPE_NULL;

    }

    current=-1;

}

void SampleStatusWidget::paintEvent(QPaintEvent *e)

{

    R=width()/2-1;

    m_center.setX(width()/2);

    m_center.setY(height()/2);

    QPainter paint;

    paint.begin(this);

    paint.setRenderHint(QPainter::Antialiasing);//平滑曲线

        paint.setPen(QPen(Qt::black,2,Qt::SolidLine));

    paint.drawEllipse(m_center,R,R);

    paint.drawEllipse(m_center,R-50,R-50);

   // paint.drawEllipse(m_center,R-20,R-20);

    int mr=getR(R-25);

    MR=R-25;

    r1=mr;

    r0=mr-6;

    for(int i=0;i<40;i++)

    {

        QPoint cp;

        QRect re;

        cp.setX(m_center.x()+qCos(2*MY_PI/40*i)*MR);

        cp.setY(m_center.y()+qSin(2*MY_PI/40*i)*MR);

        re.setLeft(cp.x()-6);

        re.setTop(cp.y()-4);

        re.setWidth(12);

        re.setHeight(8);

        draw(paint,cp,m_status[i]);

        paint.drawText(re,Qt::AlignCenter,QString::number(i+1));

    }

    if(current!=-1)

    {

        QPoint cp;

        //QRect re;

        cp.setX(m_center.x()+qCos(2*MY_PI/40*current)*MR);

        cp.setY(m_center.y()+qSin(2*MY_PI/40*current)*MR);

            paint.setPen(QPen(Qt::white,3,Qt::SolidLine));

            paint.drawEllipse(cp,r1,r1);

    }

    QPoint tp;

    status ts;

    tp.setX(m_center.x()-60);

    tp.setY(m_center.y()-(r1+2)*3);

    ts={STATE_IDLE,TYPE_NULL};

    drawLegend(paint,tp,ts,"空闲");

    tp.setY(m_center.y()-(r1+2));

    ts={STATE_REGISTERED,TYPE_NULL};

    drawLegend(paint,tp,ts,"已登记");

    tp.setY(m_center.y()+(r1+2));

    ts={STATE_DOING,TYPE_NULL};

    drawLegend(paint,tp,ts,"分析中");

    tp.setY(m_center.y()+(r1+2)*3);

    ts={STATE_FINISHED,TYPE_NULL};

    drawLegend(paint,tp,ts,"已完成");

    tp=m_center;

    tp.setX(m_center.x()+40);

    tp.setY(m_center.y()-(r1+2)*5);

    ts={STATE_IDLE,TYPE_NULL};

    drawLegend(paint,tp,ts,"空");

    tp.setY(m_center.y()-(r1+2)*3);

    ts={STATE_IDLE,TYPE_NORMAL};

    drawLegend(paint,tp,ts,"常规");

    tp.setY(m_center.y()-(r1+2)*1);

    ts={STATE_IDLE,TYPE_URGENT};

    drawLegend(paint,tp,ts,"急诊");

    tp.setY(m_center.y()+(r1+2)*1);

    ts={STATE_IDLE,TYPE_QU};

    drawLegend(paint,tp,ts,"质控");

    tp.setY(m_center.y()+(r1+2)*3);

    ts={STATE_IDLE,TYPE_CA};

    drawLegend(paint,tp,ts,"定标");

    tp.setY(m_center.y()+(r1+2)*5);

    ts={STATE_IDLE,TYPE_NOTENOUGH};

    drawLegend(paint,tp,ts,"不足");

        //paint.drawEllipse(0,0,50,60);

    paint.end();

}

void SampleStatusWidget::drawLegend( QPainter &pa, const QPoint &p, const SampleStatusWidget::status &s,const QString & str)

{

    draw(pa,p,s);

    QRect tr;

    tr.setLeft(p.x()+r1+3);

    tr.setTop(p.y()-6);

    tr.setWidth(40);

    tr.setHeight(12);

    pa.drawText(tr,Qt::AlignLeft,str);

}

static double square(const double num){return num * num;}

static double p2p(const QPoint& pt1, const QPoint& pt2)

{

    return sqrt(double(square(pt2.x() - pt1.x()) + square(pt2.y() - pt1.y())));

}

void SampleStatusWidget::mousePressEvent(QMouseEvent *e)

{

    if(e->button() == Qt::LeftButton)

    {

        //QPoint p=e->globalPos() - frameGeometry().topLeft();

        QPoint p1=e->pos();

        for(int i=0;i<40; i++)

        {

            QPoint cp;

            QRect re;

            cp.setX(m_center.x()+qCos(2*MY_PI/40*i)*MR);

            cp.setY(m_center.y()+qSin(2*MY_PI/40*i)*MR);

            if( p2p(p1,cp)<r1) {

                current=i;

                this->update();

                return ;

            }

        }

        //e->accept();

    }

}

int SampleStatusWidget::getR(int r)

{

    double L= MY_PI *2*r;

    double r1=L/80;

    return r1-1;

    //PI

}

void SampleStatusWidget::draw( QPainter &pa, const QPoint &p, const SampleStatusWidget::status &s)

{

    pa.setBrush(scolor[s.s]);

    pa.drawEllipse(p,r1,r1);

    pa.setBrush(tcolor[s.t]);

    pa.drawEllipse(p,r0,r0);

    pa.setPen(QPen(Qt::black,2,Qt::SolidLine));

    pa.setBrush(Qt::NoBrush);

    pa.drawEllipse(p,r1,r1);

    pa.drawEllipse(p,r0,r0);

}

头文件

#ifndef SAMPLESTAUSWIDGET_H

#define SAMPLESTAUSWIDGET_H

#include <QWidget>

#include <QPoint>

#include <qpainter.h>

#include <QtCore/qmath.h>

#include <QRect>

#include <QMouseEvent>

class SampleStatusWidget : public QWidget

{

    Q_OBJECT

    enum state{

        STATE_IDLE,

        STATE_REGISTERED,

        STATE_DOING,

        STATE_FINISHED,

        STATE_NUM,

    };

    enum type{

        TYPE_NULL,

        TYPE_NORMAL,

        TYPE_URGENT,

        TYPE_QU,

        TYPE_CA,

        TYPE_NOTENOUGH,

        TYPE_NUM

    };

    struct status{

        state s;

        type t;

    };

public:

    int current;

    status m_status[40];

    int r0; //内圈半径

    int r1; //外圈半径

    int R;//大圈半径

    int MR;

    const static int margin=10;

    //static const int i[2]={1.2};

    //static const  Qt::GlobalColor y=Qt::red;

     static const  QColor scolor[STATE_NUM];

     static const  QColor tcolor[TYPE_NUM];

    QPoint m_center;

    explicit SampleStatusWidget(QWidget *parent = nullptr);

    void paintEvent(QPaintEvent *e);

    int getR(int r);

    void draw( QPainter &pa, const QPoint &p, const status &s);

    void drawLegend(QPainter &pa, const QPoint &p, const SampleStatusWidget::status &s,const QString &str);

    void mousePressEvent(QMouseEvent *e);

signals:

public slots:

};

#endif // SAMPLESTAUSWIDGET_H