92 lines
3.9 KiB
C++
92 lines
3.9 KiB
C++
#include "mainwindow.h"
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#include "ui_mainwindow.h"
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#include <QApplication>
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#include <QShortcut>
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MainWindow::MainWindow(QWidget *parent)
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: QMainWindow(parent), ui(new Ui::MainWindow)
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{
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ui->setupUi(this);
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m_clock.start();
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m_refreshTimer.setInterval(100);
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connect(&m_refreshTimer, &QTimer::timeout, this, &MainWindow::refreshDisplay);
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for (QSpinBox *spin : {ui->hoursSpin, ui->minutesSpin, ui->secondsSpin})
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connect(spin, static_cast<void (QSpinBox::*)(int)>(&QSpinBox::valueChanged),
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this, &MainWindow::durationChanged);
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connect(ui->startButton, &QPushButton::clicked, this, [this] {
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m_countdown.start(m_clock.elapsed());
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refreshDisplay();
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});
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connect(ui->pauseButton, &QPushButton::clicked, this, [this] {
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const auto previousState = m_countdown.state();
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m_countdown.pause(m_clock.elapsed());
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if (previousState == Countdown::State::Running
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&& m_countdown.state() == Countdown::State::Finished
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&& ui->soundCheck->isChecked())
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QApplication::beep();
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refreshDisplay();
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});
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connect(ui->resetButton, &QPushButton::clicked, this, [this] {
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m_countdown.reset();
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refreshDisplay();
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});
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connect(ui->fullscreenButton, &QPushButton::clicked, this, [this] {
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if (isFullScreen()) showNormal(); else showFullScreen();
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ui->fullscreenButton->setText(isFullScreen() ? tr("退出全屏") : tr("全屏显示"));
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});
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auto *escape = new QShortcut(QKeySequence(Qt::Key_Escape), this);
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connect(escape, &QShortcut::activated, this, [this] {
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if (isFullScreen()) {
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showNormal();
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ui->fullscreenButton->setText(tr("全屏显示"));
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}
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});
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durationChanged();
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}
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MainWindow::~MainWindow() { delete ui; }
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void MainWindow::durationChanged()
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{
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const qint64 seconds = ui->hoursSpin->value() * 3600
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+ ui->minutesSpin->value() * 60 + ui->secondsSpin->value();
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m_countdown.setDuration(seconds * 1000);
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refreshDisplay();
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}
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void MainWindow::refreshDisplay()
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{
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const qint64 now = m_clock.elapsed();
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const auto previousState = m_countdown.state();
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m_countdown.update(now);
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const auto state = m_countdown.state();
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const bool running = state == Countdown::State::Running;
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const bool paused = state == Countdown::State::Paused;
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if (running && !m_refreshTimer.isActive()) m_refreshTimer.start();
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if (!running) m_refreshTimer.stop();
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const qint64 remaining = m_countdown.remaining(now);
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// 向上取整：还剩 1 毫秒时显示 1 秒，真正到时才显示零。
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const qint64 seconds = (remaining + 999) / 1000;
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ui->timeLabel->setText(QStringLiteral("%1:%2:%3")
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.arg(seconds / 3600, 2, 10, QLatin1Char('0'))
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.arg((seconds / 60) % 60, 2, 10, QLatin1Char('0'))
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.arg(seconds % 60, 2, 10, QLatin1Char('0')));
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ui->progressBar->setValue(m_countdown.duration() == 0 ? 0
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: static_cast<int>(remaining * 1000 / m_countdown.duration()));
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ui->durationGroup->setEnabled(!running && !paused);
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ui->startButton->setEnabled(!running && m_countdown.duration() > 0);
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ui->pauseButton->setEnabled(running);
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ui->startButton->setText(paused ? tr("继续") :
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state == Countdown::State::Finished ? tr("重新开始") : tr("开始"));
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if (running) ui->statusLabel->setText(tr("正在计时"));
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else if (paused) ui->statusLabel->setText(tr("已暂停 · 点击“继续”接着计时"));
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else if (state == Countdown::State::Finished)
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ui->statusLabel->setText(tr("时间到！本轮计时已结束。"));
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else ui->statusLabel->setText(m_countdown.duration() > 0
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? tr("准备就绪 · 点击“开始”") : tr("请先设置大于 0 的时长。"));
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if (previousState == Countdown::State::Running && state == Countdown::State::Finished
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&& ui->soundCheck->isChecked())
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QApplication::beep();
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}
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