ts/TransmitterSwitch/common/SelectTime/timepartwidget.cpp

#include "timepartwidget.h"
#include "ui_timepartwidget.h"
#include <QListWidgetItem>
#include <QScrollBar>
#include <QDateTime>
#include <QMouseEvent>
#include <QDebug>
#include "mytimedelegate.h"

TimePartWidget::TimePartWidget(QWidget *parent) :
    QWidget(parent),
    ui(new Ui::TimePartWidget)
{
    ui->setupUi(this);
}

TimePartWidget::TimePartWidget(TimePartWidget::emSection type, QWidget* parent) :
    TimePartWidget(parent)
{
    m_type = type;
    // 设置代理
    m_delegate.reset(new MyTimeDelegate(this));
    if (nullptr != m_delegate.data()) {
        ui->listWidget->setItemDelegate(m_delegate.data());
    }

    // 设置滚动条
    m_pListBar.reset(new QScrollBar(Qt::Orientation::Vertical, ui->listWidget));
    if (nullptr != m_pListBar.data()) {
        m_pListBar->move(width() - 4, 1); // 宽度4，与右侧距离2
        m_pListBar->setMinimumHeight(this->height() - 2);
        m_pListBar->setMaximumHeight(this->height() - 2);
        m_pListBar->hide();
        connect(ui->listWidget->verticalScrollBar(), &QScrollBar::valueChanged, m_pListBar.data(), &QScrollBar::setValue);
        connect(ui->listWidget->verticalScrollBar(), &QScrollBar::rangeChanged, m_pListBar.data(), &QScrollBar::setRange);
        connect(m_pListBar.data(), &QScrollBar::valueChanged, ui->listWidget->verticalScrollBar(), &QScrollBar::setValue);
    }

    switch (type) {
    case MINUTE:
    case SECOND: {
        InitListWidget(60);
        break;
    }
    case HOUR: {
        InitListWidget(24);
        break;
    }
    default:
        break;
    }
    ui->listWidget->setCurrentRow(0);
    ui->listWidget->setVerticalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
    auto pf = [this](QListWidgetItem* item){
        ui->listWidget->scrollToItem(item, QAbstractItemView::PositionAtTop); // 滚到最顶部
    };
    connect(ui->listWidget, &QListWidget::itemPressed, this, pf);
    connect(ui->listWidget, &QListWidget::itemPressed, this, &TimePartWidget::sigItemClicked);
}

TimePartWidget::~TimePartWidget()
{
    delete ui;
}

void TimePartWidget::SetTime(const QDateTime &dt)
{
    switch (m_type) {
    case HOUR:
        SelectListItem(dt.time().hour());
        break;
    case MINUTE:
        SelectListItem(dt.time().minute());
        break;
    case SECOND:
        SelectListItem(dt.time().second());
        break;
    default:
        break;
    }
}

void TimePartWidget::SetMaxWidth(int w)
{
    // 更新滚动条位置
    if (!m_pListBar.isNull()) {
        m_pListBar->move(w - 4, 1);
    }
}

void TimePartWidget::ScrollToSelect()
{
    auto items = ui->listWidget->selectedItems();
    if (items.count() > 0) {
        ui->listWidget->scrollToItem(items.at(0), QAbstractItemView::PositionAtTop);
    }
}

void TimePartWidget::enterEvent(QEvent *event)
{
    if (!m_pListBar.isNull()) {
        m_pListBar->show();
    }

    QWidget::enterEvent(event);
}

void TimePartWidget::leaveEvent(QEvent *event)
{
    if (!m_pListBar.isNull()) {
        m_pListBar->hide();
    }
    QWidget::leaveEvent(event);
}

void TimePartWidget::InitListWidget(int total)
{
    ui->listWidget->clear();
    for (int i = 0; i < total; ++i) {
        QListWidgetItem* pItem = new QListWidgetItem;
        if (nullptr == pItem) {
            continue;
        }
        pItem->setTextAlignment(Qt::AlignCenter);
        pItem->setText(QString("%1").arg(i, 2, 10, QLatin1Char('0')));
        pItem->setSizeHint(QSize(32, 32));
        ui->listWidget->addItem(pItem);
    }
    // 填充4个不可选空白项
    for (int i = 0; i < 4; ++i) {
        QListWidgetItem* pItem = new QListWidgetItem;
        if (nullptr == pItem) continue;
        pItem->setSizeHint(QSize(32, 32));
        pItem->setFlags(pItem->flags() & ~Qt::ItemIsEnabled & ~Qt::ItemIsSelectable);
        ui->listWidget->addItem(pItem);
    }
}

void TimePartWidget::SelectListItem(int time)
{
    for (int i = 0; i < ui->listWidget->count(); ++i) {
        QListWidgetItem* pItem = ui->listWidget->item(i);
        if (nullptr == pItem) continue;
        // 注意时间填充了0
        if (pItem->text() == QString("%1").arg(time, 2, 10, QLatin1Char('0'))) {
            //qInfo() << "SelectListItem: " << "滚动到最顶部, time: " << time;
            pItem->setSelected(true);
            ui->listWidget->scrollToItem(pItem, QAbstractItemView::PositionAtTop); // 滚到最顶部
            break;
        }
    }
}