code_app/modules/saneui/dialog_device_select.cpp

#include "dialog_device_select.h"
#include "ui_dialog_device_select.h"
#include <QMessageBox>

Dialog_Device_Select::Dialog_Device_Select(const SANEAPI* saneApi, const char **devNames, QWidget *parent) :
    QDialog(parent),
    ui(new Ui::Dialog_Device_Select)
{
    ui->setupUi(this);

    memcpy(&m_saneAPI, saneApi, sizeof(SANEAPI));
    m_devHandle = nullptr;
    m_devName.clear();
    m_vDevName.clear();

    setWindowFlags(Qt::Dialog | Qt::WindowCloseButtonHint);

    if (nullptr == devNames)
    {
        const SANE_Device** device_list;
        if (SANE_STATUS_GOOD == saneApi->sane_get_devices_api(&device_list, SANE_TRUE))
        {
            const SANE_Device** p;
            for (p = device_list; *p != nullptr; ++p)
            {
                m_vDevName.push_back((*p)->name);
                ui->listWidget->addItem((*p)->name);
            }
        }
    }
    else
    {
        const char **p = devNames;
        while (*p != nullptr)
        {
            m_vDevName.push_back(*p);
            ui->listWidget->addItem(*p);
            ++p;
        }
    }

    if (!m_vDevName.empty())
    {
        ui->listWidget->setCurrentRow(0);
    }
	if (ui->listWidget->count() > 1)
    	processSameDeviceType();
}

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

SANE_Handle Dialog_Device_Select::GetDevHandle()
{
    return m_devHandle;
}

std::string Dialog_Device_Select::GetDevName()
{
    return m_devName;
}

void Dialog_Device_Select::processSameDeviceType()
{
    int len = ui->listWidget->count();
    for (int i = 0; i < len - 1; ++i)
    {
        for (int j = i + 1; j < len; ++j)
        {
            QString devName = ui->listWidget->item(i)->text();
            QString devName2 = ui->listWidget->item(j)->text();
            if (devName.contains(" - "))
            {
                devName.truncate(devName.lastIndexOf(" - "));
                if (!devName.contains(" - "))
                {
                    devName = ui->listWidget->item(i)->text();
                }
            }

            if (devName2.contains(" - "))
            {
                devName2.truncate(devName2.lastIndexOf(" - "));
                if (!devName2.contains(" - "))
                {
                    devName2 = ui->listWidget->item(j)->text();
                }
            }

            if (devName == devName2)
            {
                SANE_Handle dev = nullptr;
                SANE_Status ret = m_saneAPI.sane_open_api(ui->listWidget->item(i)->text().toStdString().c_str(), &dev);
                if (SANE_STATUS_GOOD == ret && dev != nullptr)
                {
                    char serialNum[32] = {0};
                    m_saneAPI.sane_control_option_api(dev, SANE_OPT_ID_DEVICE_SERIAL_NO, SANE_ACTION_GET_VALUE, serialNum, NULL);
                    ui->listWidget->item(i)->setText(ui->listWidget->item(i)->text() + "(" + QString::fromLocal8Bit(serialNum) + ")");
                    m_saneAPI.sane_close_api(dev);
                }

                ret = m_saneAPI.sane_open_api(ui->listWidget->item(j)->text().toStdString().c_str(), &dev);
                if (SANE_STATUS_GOOD == ret && dev != nullptr)
                {
                    char serialNum[32] = {0};
                    m_saneAPI.sane_control_option_api(dev, SANE_OPT_ID_DEVICE_SERIAL_NO, SANE_ACTION_GET_VALUE, serialNum, NULL);
                    ui->listWidget->item(j)->setText(ui->listWidget->item(j)->text() + "(" + QString::fromLocal8Bit(serialNum) + ")");
                    m_saneAPI.sane_close_api(dev);
                }
            }
        }
    }
}

void Dialog_Device_Select::on_pushButton_OK_clicked()
{
    int index = ui->listWidget->currentRow();
    if (index < 0)
    {
        return;
    }

    SANE_Handle dev = nullptr;
    SANE_Status ret = m_saneAPI.sane_open_api(m_vDevName[index].c_str(), &dev);
    if (SANE_STATUS_GOOD != ret)
    {
        QMessageBox::information(this, tr("tips"), QString::fromUtf8(m_saneAPI.sane_strstatus_api(ret)));
        return;
    }

    m_devHandle = dev;
    m_devName = m_vDevName[index];
    accept();
}

void Dialog_Device_Select::on_pushButton_Cancel_clicked()
{
    reject();
}

void Dialog_Device_Select::on_listWidget_itemDoubleClicked(QListWidgetItem *item)
{
    on_pushButton_OK_clicked();
}