qt/LedOK/player/eleanaclock.cpp

#include "eleanaclock.h"
#include <QJsonObject>
#include <QPainter>

EleAnaClock::EleAnaClock(double w, double h, QString path, const QJsonObject &layer, QWidget *parent) : QWidget{parent} {
    timeZone = QTimeZone(layer["timezone"].toString().toUtf8());
    img.load(path);
    pinHourColor = layer["pinHourColor"].toString();
    pinMinColor = layer["pinMinColor"].toString();
    pinSecColor = layer["pinSecColor"].toString();
    auto hhLen = layer["pinHourLen"].toInt();
    auto mhLen = layer["pinMinLen"].toInt();
    auto shLen = layer["pinSecLen"].toInt();
    auto hhWidth = layer["pinHourWidth"].toInt();
    auto mhWidth = layer["pinMinWidth"].toInt();
    auto shWidth = layer["pinSecWidth"].toInt();
    showSecHand = layer["showSecond"].toBool();
    auto sideLen = w;
    if(h < sideLen) sideLen = h;
    auto lineWidth = sideLen/128;
    if(lineWidth < 1) lineWidth = 1;
    pen.setWidthF(lineWidth);
    pen.setJoinStyle(Qt::RoundJoin);

    hPoses[0].rx() = hhWidth*sideLen/400;
    hPoses[1].ry() = hhLen*sideLen/-200;
    hPoses[2].rx() = -hPoses[0].rx();

    mPoses[0].rx() = mhWidth*sideLen/400;
    mPoses[1].ry() = mhLen*sideLen/-200;
    mPoses[2].rx() = -mPoses[0].rx();

    sPoses[0].rx() = shWidth*sideLen/400;
    sPoses[1].ry() = shLen*sideLen/-200;
    sPoses[2].rx() = -sPoses[0].rx();
}

void EleAnaClock::cal() {
    auto time = QDateTime::currentDateTime().toTimeZone(timeZone).time();
    sAngle = time.second() * 6;
    mAngle = time.minute() * 6 + sAngle/60;
    hAngle = time.hour() * 30 + mAngle/12;
}
void EleAnaClock::paintEvent(QPaintEvent *) {
    if(timerId==0) {
        timerId = startTimer(500, Qt::PreciseTimer);
        cal();
    }
    QPainter painter(this);
    painter.setRenderHints(QPainter::Antialiasing|QPainter::SmoothPixmapTransform);
    if(! img.isNull()) painter.drawPixmap(0, 0, width(), height(), img);
    painter.translate(width()/2, height()/2);

    pen.setColor(pinHourColor);
    painter.setPen(pen);
    painter.setBrush(pen.brush());
    painter.rotate(hAngle);
    painter.drawPolygon(hPoses, 3);

    pen.setColor(pinMinColor);
    painter.setPen(pen);
    painter.setBrush(pen.brush());
    painter.rotate(mAngle-hAngle);
    painter.drawPolygon(mPoses, 3);
    if(showSecHand) {
        pen.setColor(pinSecColor);
        painter.setPen(pen);
        painter.setBrush(pen.brush());
        painter.rotate(sAngle-mAngle);
        painter.drawPolygon(sPoses, 3);
    }
}

void EleAnaClock::timerEvent(QTimerEvent *) {
    if(isVisible()) {
        cal();
        update();
    } else if(timerId!=0) {
        killTimer(timerId);
        timerId = 0;
    }
}