Qt入门练习项目,C++Qt写的数字时钟源码

#include "clockwidget.h" #include "ui_clockwidget.h" #include "windows.h" #include "qdebug.h" #include "numberhelper.h" ClockWidget::ClockWidget(QWidget *parent) : QWidget(parent), ui(new Ui::ClockWidget) { ui->setupUi(this); // 界面设置 setWindowFlags(Qt::FramelessWindowHint | Qt::Tool); setAttribute(Qt::WA_TranslucentBackground); ::SetWindowPos(HWND(this->winId()), HWND_TOPMOST, 0, 0, 0, 0, SWP_NOMOVE | SWP_NOSIZE | SWP_SHOWWINDOW); showFullScreen(); // 设置定时器 timer = new QTimer; timer->setInterval(1000); timer->start(); connect(timer, &QTimer::timeout, this, [=](){ this->update(); }); // HWND desktop = ::FindWindowEx(NULL, NULL, L"Progman", NULL); // ::SetParent((HWND)this->winId(), desktop); } void paintTimer(QPainter* painter, int time, int width = 0, int len = 0, QString preStr = "", QString sufStr = "") { for(int i = 0; i < len; i++) { painter->save(); painter->rotate(360 / len * i); painter->setPen(i?Qt::white:Qt::red); QString s = NumberHelper::numToStr(preStr, (time + i - 1) % len + 1, sufStr); painter->drawText(width, 0, QString("%1").arg(s)); painter->restore(); } } void ClockWidget::paintEvent(QPaintEvent *) { QDateTime nowtime = QDateTime::currentDateTime(); int year = nowtime.date().year(); QString yearStr = NumberHelper::numToStrWithoutUnit("", year, "年"); int month = nowtime.date().month(); int day = nowtime.date().day(); int week = nowtime.date().dayOfWeek(); int hour = nowtime.time().hour(); int minute = nowtime.time().minute(); int second = nowtime.time().second(); // 界面宽高 int width = this->width(); int height = this->height(); // 画家配置 QPainter painter(this); painter.setFont(QFont("宋体", 12)); painter.setPen(Qt::black); painter.setRenderHints(QPainter::Antialiasing | QPainter::TextAntialiasing); painter.translate(width / 2, height / 2); // 计算年份 QFontMetrics metrics = painter.fontMetrics(); int m_width = metrics.width(yearStr); painter.setPen(Qt::red); painter.drawText(-m_width / 2, 0, yearStr); // 计算月份 paintTimer(&painter, month, 80, 12, "", "月"); // 计算日期 paintTimer(&painter, day, 160, 30, "", "日"); // 计算星期 paintTimer(&painter, week, 240, 7, "星期", ""); // 计算小时 paintTimer(&painter, hour, 320, 24, "", "时"); // 计算分钟 paintTimer(&painter, minute, 400, 60, "", "分"); // 计算秒 paintTimer(&painter, second, 480, 60, "", "秒"); } ClockWidget::~ClockWidget() { timer->stop(); delete timer; delete ui; }