117 lines
2.6 KiB
C++
117 lines
2.6 KiB
C++
#include "dialog_scan.h"
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#include "ui_dialog_scan.h"
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#include <QCloseEvent>
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#include "mainwindow.h"
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Dialog_Scan::Dialog_Scan(class MainWindow *mainWnd)
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: QDialog(nullptr)
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, ui(new Ui::Dialog_Scan)
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, m_mainWnd(mainWnd)
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, m_devHandle(nullptr)
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{
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ui->setupUi(this);
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setWindowFlags(Qt::Dialog | Qt::WindowCloseButtonHint);
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connect(this, SIGNAL(deviceArrive(QString)), this, SLOT(on_deviceArrive(QString)));
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connect(this, SIGNAL(deviceRemove(QString)), this, SLOT(on_deviceRemove(QString)));
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SANE_Int version_code = 0;
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sane_init_ex(&version_code, sane_ex_callback, this);
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}
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Dialog_Scan::~Dialog_Scan()
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{
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if (NULL != m_devHandle)
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{
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sane_cancel(m_devHandle);
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sane_close(m_devHandle);
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m_devHandle = NULL;
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m_devName.clear();
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}
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sane_exit();
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delete ui;
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}
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int Dialog_Scan::sane_ex_callback(SANE_Handle hdev, int code, void* data, unsigned int* len, void* param)
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{
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(void)hdev;
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(void)len;
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Dialog_Scan* p = (Dialog_Scan*)param;
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switch (code)
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{
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case SANE_EVENT_DEVICE_ARRIVED:
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{
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SANE_Device* sane_dev = (SANE_Device*)data;
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emit p->deviceArrive(sane_dev->name);
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}
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break;
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case SANE_EVENT_DEVICE_LEFT:
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{
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SANE_Device* sane_dev = (SANE_Device*)data;
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emit p->deviceRemove(sane_dev->name);
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}
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break;
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}
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return 0;
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}
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void Dialog_Scan::closeEvent(QCloseEvent *e)
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{
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hide(); // 隐藏主窗口
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e->ignore(); //忽略关闭事件，这样才不会关闭程序
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}
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void Dialog_Scan::on_deviceArrive(QString devName)
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{
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ui->comboBox->addItem(devName);
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if (nullptr == m_devHandle)
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{
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SANE_Status status = sane_open(devName.toStdString().c_str(), &m_devHandle);
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if (SANE_STATUS_GOOD == status)
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{
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m_devName = devName;
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}
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}
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}
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void Dialog_Scan::on_deviceRemove(QString devName)
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{
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if (devName == m_devName)
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{
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assert(NULL != m_devHandle);
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sane_cancel(m_devHandle);
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sane_close(m_devHandle);
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m_devHandle = NULL;
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m_devName.clear();
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}
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for (int i = 0; i < ui->comboBox->count(); ++i)
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{
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if (ui->comboBox->itemText(i) == devName)
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{
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ui->comboBox->removeItem(i);
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break;
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}
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}
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}
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void Dialog_Scan::on_comboBox_currentIndexChanged(const QString &arg1)
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{
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if (NULL != m_devHandle)
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{
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sane_cancel(m_devHandle);
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sane_close(m_devHandle);
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m_devHandle = NULL;
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m_devName.clear();
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}
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SANE_Status status = sane_open(arg1.toStdString().c_str(), &m_devHandle);
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if (SANE_STATUS_GOOD == status)
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{
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m_devName = arg1;
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}
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}
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