code_app/app/scanner/dialog_log.cpp

#include "dialog_log.h"
#include "ui_dialog_log.h"
#include <QDateTime>
#include "app_cfg.h"

dialog_log::dialog_log(QWidget *parent)
    : QDialog(parent)
    , ui(new Ui::dialog_log), ind_scanning_(-1), img_received_(0), msg_fixed_scanning_("")
{
    ui->setupUi(this);
    QHBoxLayout *bottom = new QHBoxLayout();

    pbtn_clear = new QPushButton(this);
    cBox_autoScroll = new QCheckBox(this);
    pbtn_stop = new QPushButton(this);
    pbtn_continueScan = new QPushButton(this);
    pbtn_finishScan = new QPushButton(this);

    pbtn_stop->setVisible(false);
    pbtn_continueScan->setVisible(false);
    pbtn_finishScan->setVisible(false);

    pbtn_stop->setText(tr("cancel scan"));
    cBox_autoScroll->setText(tr("auto scroll"));
    pbtn_clear->setText(tr("clear"));
    pbtn_continueScan->setText(tr("continue scan"));
    pbtn_finishScan->setText(tr("finish scan"));

    bottom->addWidget(pbtn_clear);
    bottom->addWidget(cBox_autoScroll);
    bottom->addStretch();
    bottom->addWidget(pbtn_stop);
    bottom->addWidget(pbtn_continueScan);
    bottom->addWidget(pbtn_finishScan);

    ui->verticalLayout->addItem(bottom);

    cBox_autoScroll->setChecked(getCfgValue("log", "autoScroll", true));

    connect(cBox_autoScroll, SIGNAL(stateChanged(int)), this, SLOT(on_cbox_autoScroll_stateChanged(int)));
    connect(pbtn_stop, SIGNAL(clicked(bool)), this, SLOT(on_pbtn_stop_clicked()));
    connect(pbtn_clear, SIGNAL(clicked(bool)), this, SLOT(on_pbtn_clear_clicked()));
    connect(pbtn_continueScan, SIGNAL(clicked(bool)), this, SLOT(on_pbtn_continuScan_cliked()));
    connect(pbtn_finishScan, SIGNAL(clicked(bool)), this, SLOT(on_pbtn_finishScan_cliked()));
}

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

void dialog_log::addLog(const QString &log, bool err, int log_event)
{
    if (ui->listWidget->count() > 1000)
    {
        for(int i = 0; i < 100; ++i)
        {
            QListWidgetItem *item = ui->listWidget->takeItem(0);
            delete item;
        }
    }

    QDateTime timeCurrent = QDateTime::currentDateTime();
    QString time = timeCurrent.toString("[yy-MM-dd hh:mm:ss]");
    ui->listWidget->addItem(time + "  " + log);

    int idx = ui->listWidget->count() - 1;
    if(log_event == LOG_EVENT_SCAN_BEGINNING)
    {
        msg_fixed_scanning_ = (time + "  " + log).toStdString();
        ind_scanning_ = idx;
        img_received_ = 0;
    }
    else if(log_event == LOG_EVENT_SCAN_STOPPED)
    {
        char    utf8[128] = {0};
        sprintf(utf8, "\357\274\210\346\234\254\350\275\256\345\205\261\346\211\253\346\217\217\345\233\276\347\211\207 %u \345\271\205\357\274\211", img_received_);
        if(ind_scanning_ >= 0 && ind_scanning_ < idx)
            ui->listWidget->item(ind_scanning_)->setText(QString::fromStdString(msg_fixed_scanning_));
        if (idx >= 0)
            ui->listWidget->item(idx)->setText(time + "  " + log + QString::fromStdString(utf8));
        ind_scanning_ = -1;
        msg_fixed_scanning_ = "";
    }
    if (idx >= 0)
        ui->listWidget->item(idx)->setTextColor(err ? Qt::red : Qt::black);

    if (cBox_autoScroll->isChecked())
    {
        ui->listWidget->scrollToItem(ui->listWidget->item(idx));
    }
}

void dialog_log::updateStatus(bool online, bool isScanning)
{
    if (!online)
    {
        pbtn_stop->hide();
        pbtn_continueScan->hide();
        pbtn_finishScan->hide();
    }
    else
    {
        if (isScanning)
        {
            pbtn_stop->show();
            pbtn_continueScan->hide();
            pbtn_finishScan->hide();
        }
        else
        {
            pbtn_stop->hide();
            pbtn_continueScan->show();
            pbtn_finishScan->show();
        }
    }
}

void dialog_log::image_received_from_scanner(void)
{
    img_received_++;
    if(ind_scanning_ >= 0 && ind_scanning_ < ui->listWidget->count())
    {
        char    count[20];
        sprintf(count, "(%d)", img_received_);
        ui->listWidget->item(ind_scanning_)->setText(QString::fromStdString(msg_fixed_scanning_ + count));
    }
}

void dialog_log::closeEvent(QCloseEvent *event)
{
    (void)event;
    on_pbtn_stop_clicked();
}

void dialog_log::on_pbtn_continuScan_cliked()
{
    img_received_ = 0;
    emit continueScan();
}

void dialog_log::on_pbtn_finishScan_cliked()
{
    close();
}

void dialog_log::on_cbox_autoScroll_stateChanged(int state)
{
    (void)state;
    saveCfgValue("log", "autoScroll", cBox_autoScroll->isChecked());
}

void dialog_log::on_pbtn_stop_clicked(void)
{
    emit stopScan();
}

void dialog_log::on_pbtn_clear_clicked()
{
    ui->listWidget->clear();
    ind_scanning_ = -1;
}