video-pc/AvPlayer2/play_control_window.cpp

// ***********************************************************/
// play_control_window.cpp
//
//      Copy Right @ Steven Huang. All rights reserved.
//
// video play control panel.
// ***********************************************************/

#include "play_control_window.h"
#include "mainwindowa.h"

#define PLAY_SPEED_STEP 0.25
#define PLAY_SPEED_START 0.5
#define PLAY_SPEED_STOP 2 // 4 speed multiple from start to stop in step

#include "clickable_slider.h"

PlayControlWnd::PlayControlWnd(PlayerController* playerController, QWidget* parent)
    : QWidget(parent)
{
    // 1. 创建控件
    btn_pre = new QPushButton("<<", this);
    btn_play = new QPushButton("Play", this);
    btn_next = new QPushButton(">>", this);
    btn_stop = new QPushButton("Stop", this);
    slider_speed = new QSlider(Qt::Horizontal, this);
    label_speed = new QLabel("1.0x", this);
    check_mute = new QCheckBox("Mute", this);
    slider_vol = new QSlider(Qt::Horizontal, this);
    label_vol = new QLabel("0", this);
    progress_slider = new ClickableSlider(this);

    label_curTime = new QLabel("00:00", this);
    label_totalTime = new QLabel("00:00", this);
    label_divider = new QLabel("/", this);

    // 2. 设置控件属性
    slider_speed->setMinimum(1);
    slider_speed->setMaximum(8);
    slider_speed->setValue(4);
    slider_speed->setTickPosition(QSlider::TicksAbove);
    slider_speed->setTickInterval(1);
    slider_speed->setFixedHeight(30);
    label_speed->setFixedWidth(28);
    label_speed->setAlignment(Qt::AlignRight | Qt::AlignVCenter);
    slider_vol->setMinimum(0);
    slider_vol->setMaximum(100);
    slider_vol->setSingleStep(5);
    slider_vol->setPageStep(5);
    slider_vol->setFixedHeight(22);
    label_vol->setFixedWidth(20);
    label_vol->setAlignment(Qt::AlignCenter);
    progress_slider->setMinimum(0);
    progress_slider->setMaximum(100);
    progress_slider->setSingleStep(1);
    progress_slider->setPageStep(5);
    progress_slider->setTracking(true);
    progress_slider->setFixedHeight(18);
    label_curTime->setFixedWidth(48);
    label_totalTime->setFixedWidth(48);
    label_divider->setText("/");
    label_divider->setFixedWidth(10);

    // 3. 布局
    hLayout_progress = new QHBoxLayout;
    hLayout_progress->setSpacing(2);
    hLayout_progress->addWidget(progress_slider, 1);
    hLayout_progress->addWidget(label_curTime);
    hLayout_progress->addWidget(label_divider);
    hLayout_progress->addWidget(label_totalTime);

    hLayout_controls = new QHBoxLayout;
    hLayout_controls->setSpacing(1);
    hLayout_controls->addWidget(btn_pre);
    hLayout_controls->addWidget(btn_play);
    hLayout_controls->addWidget(btn_next);
    hLayout_controls->addWidget(btn_stop);
    hLayout_controls->addSpacing(10);
    hLayout_controls->addWidget(slider_speed);
    hLayout_controls->addWidget(label_speed);
    hLayout_controls->addSpacing(10);
    hLayout_controls->addWidget(check_mute);
    hLayout_controls->addWidget(slider_vol);
    hLayout_controls->addWidget(label_vol);

    mainLayout = new QVBoxLayout(this);
    mainLayout->setContentsMargins(0, 0, 0, 0);
    mainLayout->setSpacing(2);
    mainLayout->addLayout(hLayout_progress);
    mainLayout->addLayout(hLayout_controls);
    setLayout(mainLayout);

    // 4. 信号槽
    connect(slider_vol, SIGNAL(valueChanged(int)), label_vol, SLOT(setNum(int)));
    connect(check_mute, &QCheckBox::stateChanged, this, &PlayControlWnd::volume_muted);
    connect(check_mute, &QCheckBox::stateChanged, playerController, &PlayerController::playMute);
    connect(btn_stop, &QPushButton::clicked, playerController, &PlayerController::stopPlay);
    connect(btn_play, &QPushButton::clicked, playerController, &PlayerController::pausePlay);
    connect(slider_vol,
            &QSlider::valueChanged,
            playerController,
            [this, playerController](int value) {
                auto maxValue = get_volum_slider_max();
                playerController->setVolume(value, maxValue);
            });
    connect(btn_pre, &QPushButton::pressed, playerController, &PlayerController::playSeekPre);
    connect(btn_next, &QPushButton::pressed, playerController, &PlayerController::playSeekNext);
    connect(progress_slider, &QSlider::sliderReleased, playerController, &PlayerController::playStartSeek);
    connect(progress_slider, &QSlider::sliderPressed, playerController, &PlayerController::pausePlay);
    connect(progress_slider, &ClickableSlider::onClick, playerController, &PlayerController::playSeek);
    connect(slider_speed, &QSlider::valueChanged, this, &PlayControlWnd::speed_changed);
    connect(slider_speed, &QSlider::valueChanged, playerController, [this, playerController]() {
        auto speed = get_speed();
        playerController->setPlaySpeed(speed);
    });

    clear_all();
}

PlayControlWnd::~PlayControlWnd()
{
}

void PlayControlWnd::set_focus_policy()
{
    /*
   * Disable widgets in this window to accept foucs,
   * so all key event will be transfered to the
   * parent widget. The mainwindow will handle these keyevent
   * to control the playing.
   */

    // setFocusPolicy(Qt::NoFocus);
    progress_slider->setFocusPolicy(Qt::NoFocus);
    slider_speed->setFocusPolicy(Qt::NoFocus);
    slider_vol->setFocusPolicy(Qt::NoFocus);

    btn_pre->setFocusPolicy(Qt::NoFocus);
    btn_play->setFocusPolicy(Qt::NoFocus);
    btn_next->setFocusPolicy(Qt::NoFocus);
    btn_stop->setFocusPolicy(Qt::NoFocus);
    check_mute->setFocusPolicy(Qt::NoFocus);
}

void PlayControlWnd::volume_muted(int mute)
{
    bool enable = !mute;
    label_vol->setEnabled(enable);
    slider_vol->setEnabled(enable);
    check_mute->setChecked(!enable);
}

void PlayControlWnd::speed_changed(int value)
{
    int max = slider_speed->maximum();
    value %= (max + 1);
    double speed = (value - 1) * PLAY_SPEED_STEP + PLAY_SPEED_START;
    QString str = QString::number(speed, 'f', 2) + "x";
    // qDebug() << speed << max << "str=" << str;
    label_speed->setText(str);
}

double PlayControlWnd::get_speed() const
{
    int value = slider_speed->value();
    return (value - 1) * PLAY_SPEED_STEP + PLAY_SPEED_START;
}

void PlayControlWnd::speed_adjust(bool up)
{
    int value = slider_speed->value();
    int max = slider_speed->maximum();
    if (up)
    {
        value += 1;
    }
    else
    {
        value -= 1;
    }

    value = value > max ? max : value;
    value = value < 0 ? 0 : value;
    slider_speed->setValue(value);
}

void PlayControlWnd::init_slider_speed()
{
    int maxSpeed = (PLAY_SPEED_STOP + PLAY_SPEED_STEP - PLAY_SPEED_START) / PLAY_SPEED_STEP; // 8
    slider_speed->setMaximum(maxSpeed);
    slider_speed->setValue((1 + PLAY_SPEED_STEP - PLAY_SPEED_START) / PLAY_SPEED_STEP); // set 1x speed
}

void PlayControlWnd::set_volume_slider(float volume)
{
    enable_slider_vol(true);
    auto max = slider_vol->maximum();
    slider_vol->setValue(int(volume * max));
}

inline double PlayControlWnd::get_time_secs(int64_t hours, int64_t mins, int64_t secs)
{
    return hours * 60 * 60 + mins * 60 + secs;
}

inline QSlider* PlayControlWnd::get_progress_slider() const
{
    return progress_slider;
}

inline QSlider* PlayControlWnd::get_volume_slider() const
{
    return slider_vol;
}

inline QSlider* PlayControlWnd::get_speed_slider() const
{
    return slider_speed;
}

int PlayControlWnd::get_volum_slider_max()
{
    return get_volume_slider()->maximum();
}

int PlayControlWnd::get_progress_slider_max()
{
    return get_progress_slider()->maximum();
}

int PlayControlWnd::get_progress_slider_value()
{
    return get_progress_slider()->value();
}

void PlayControlWnd::enable_progressbar(bool enable)
{
    get_progress_slider()->setEnabled(enable);
}

void PlayControlWnd::enable_slider_vol(bool enable)
{
    slider_vol->setEnabled(enable);
}

void PlayControlWnd::enable_slider_speed(bool enable)
{
    slider_speed->setEnabled(enable);
}

void PlayControlWnd::get_play_time_params(int64_t total_secs, int64_t& hours, int64_t& mins, int64_t& secs)
{
#if 1
    mins = total_secs / 60;
    secs = total_secs % 60;
    hours = mins / 60;
    mins %= 60;
#else
    hours = int(total_secs / 3600);
    mins = (total_secs - hours * 3600) / 60;
    secs = (total_secs - hours * 3600 - mins * 60);
#endif
}

void PlayControlWnd::update_play_time(int64_t hours, int64_t mins, int64_t secs)
{
    auto time_str = get_play_time(hours, mins, secs);
    label_curTime->setText(time_str);

    int percent = 0;
    auto total = get_total_time();
    auto cur = get_time_secs(hours, mins, secs);
    cur = cur > total ? total : cur;
    if (total > 0)
    {
        percent = cur * get_progress_slider()->maximum() / total;
    }
    get_progress_slider()->setValue(percent);
}

void PlayControlWnd::update_play_time(int64_t total_secs)
{
    int64_t hours = 0, mins = 0, secs = 0;
    double total = get_total_time();

    total_secs = total_secs < 0 ? 0 : total_secs;
    total_secs = total_secs > total ? total : total_secs;

    get_play_time_params(total_secs, hours, mins, secs);
    // qDebug() << "total:" << total_secs << "h:" << hours << "m:" << mins <<
    // "ses:" << secs;
    update_play_time(hours, mins, secs);
}

double PlayControlWnd::get_total_time() const
{
    return get_time_secs(m_hours, m_mins, m_secs);
}

void PlayControlWnd::set_total_time(int64_t hours, int64_t mins, int64_t secs)
{
    enable_progressbar();
    enable_play_buttons();
    enable_slider_vol();
    enable_slider_speed();
    check_mute->setEnabled(true);
    init_slider_speed();

    m_hours = hours;
    m_mins = mins;
    m_secs = secs;

    set_progress_bar(get_total_time());
    label_totalTime->setText(get_play_time(hours, mins, secs));
}

void PlayControlWnd::set_progress_bar(double total_secs)
{
    get_progress_slider()->setMaximum(total_secs);
}

QString PlayControlWnd::get_play_time(int64_t hours, int64_t mins, int64_t secs)
{
    QString str;

    if (hours == 0)
    {
        str = QString("%1:%2")
                  .arg(QString::number(mins).rightJustified(2, '0'))
                  .arg(QString::number(secs).rightJustified(2, '0'));
    }
    else
    {
        str = QString("%1:%2:%3")
                  .arg(QString::number(hours).rightJustified(2, '0'))
                  .arg(QString::number(mins).rightJustified(2, '0'))
                  .arg(QString::number(secs).rightJustified(2, '0'));
    }
    return str;
}

void PlayControlWnd::clear_time()
{
    m_hours = 0;
    m_mins = 0;
    m_secs = 0;

    get_progress_slider()->setValue(0);
    label_totalTime->setText("--:--");
    label_curTime->setText("--:--");
}

void PlayControlWnd::clear_all()
{
    clear_time();
    enable_progressbar(false);
    update_btn_play();

    enable_slider_speed(false);
    enable_slider_vol(false);
    enable_play_buttons(false);
    check_mute->setEnabled(false);

    init_slider_speed();
}

void PlayControlWnd::update_btn_play(bool bPause)
{
    if (bPause)
    {
        btn_play->setText("Play");
    }
    else
    {
        btn_play->setText("Pause");
    }
}

void PlayControlWnd::enable_play_buttons(bool enable)
{
    btn_next->setEnabled(enable);
    btn_pre->setEnabled(enable);
    btn_play->setEnabled(enable);
    btn_stop->setEnabled(enable);
}

void PlayControlWnd::keyPressEvent(QKeyEvent* event)
{
    if (auto pParent = (MainWindowA*) parent()) {
        QApplication::sendEvent(pParent, event);
        event->ignore();
    } else {
        QWidget::keyPressEvent(event);
    }
}