pc-system/homepage.cpp

#include "homepage.h"

#include <QDate>
#include <QJsonArray>
#include <QJsonDocument>
#include <QJsonObject>
#include <QList>
#include <QPainter>
#include <QPair>
#include <QtCharts/QBarCategoryAxis>
#include <QtCharts/QBarSeries>
#include <QtCharts/QBarSet>
#include <QtCharts/QChart>
#include <QtCharts/QChartView>
#include <QtCharts/QValueAxis>

#include "backendapimanager.h"
#include "ui_homepage.h"

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

    QJsonArray dailyCount;
    dailyCount = backendAPIManager::getDailyBlastedCount(15);

    QDate today = QDate::currentDate();
    QString dateTodayStr = QDate::currentDate().toString("yyyy-MM-dd");

    QList<QPair<QDate, int>> data;
    // 根据today，倒退15天，检查dailyCount中date是否和日期匹配，如果匹配设置数据，不匹配则设置0
    for (int i = 0; i < 15; ++i) {
        QDate date = today.addDays(-i);
        QString dateStr = date.toString("yyyy-MM-dd");
        bool found = false;

        if (dailyCount[0].toObject().value("blast_at").toString() == dateStr) {
            if (dateStr == dateTodayStr) {
                m_todayCount = dailyCount[0].toObject().value("count").toInt();
            }
            data.append(qMakePair(date, dailyCount[0].toObject().value("count").toInt()));
            dailyCount.removeFirst();  // 移除已处理的元素
        } else {
            data.append(qMakePair(date, 0));
        }
    }
    draw(data);
}
Homepage::~Homepage() { delete ui; }

void Homepage::draw(QList<QPair<QDate, int>> data) {
    // 2. Bar Set and Series
    QBarSet *set = new QBarSet("");
    QStringList categories;
    int totalCount = 0;
    for (const auto &entry : data) {
        *set << entry.second;
        categories << entry.first.toString("MM-dd");
        totalCount += entry.second;
    }
    if (totalCount == 0) {
        set->setLabel("无爆破数据");
    } else {
        set->setLabel("总计: " + QString::number(totalCount));
    }

    QBarSeries *series = new QBarSeries();
    series->append(set);
    series->setLabelsVisible(true);

    // 3. Create Chart
    QChart *chart = new QChart();
    chart->addSeries(series);
    chart->setTitle("近15日已上传爆破数据统计");

    // 4. X-axis (Category with Dates)
    QBarCategoryAxis *axisX = new QBarCategoryAxis();
    axisX->append(categories);
    axisX->setTitleText("日期");
    chart->addAxis(axisX, Qt::AlignBottom);
    series->attachAxis(axisX);

    // 5. Y-axis (Count)
    QValueAxis *axisY = new QValueAxis();
    axisY->setTitleText("数量");
    axisY->setLabelFormat("%d");
    chart->addAxis(axisY, Qt::AlignLeft);
    series->attachAxis(axisY);

    // 6. Show Chart
    QChartView *chartView = new QChartView(chart);
    chartView->setRenderHint(QPainter::Antialiasing);

    // Add the chart view to the widget's layout
    QVBoxLayout *layout = new QVBoxLayout(ui->chartWidget);
    layout->addWidget(chartView);
    ui->chartWidget->setLayout(layout);

    ui->todayBlastCount->display(m_todayCount);
}