“增加扫描错误提示”

app/scanner/mainwindow.cpp

@@ -213,6 +213,7 @@ MainWindow::MainWindow(QWidget *parent)
     connect(this, SIGNAL(new_image(void *)), this, SLOT(on_new_image(void *)), Qt::QueuedConnection);
     connect(this, SIGNAL(scan_working()), this, SLOT(on_scan_working()), Qt::QueuedConnection);
     connect(this, SIGNAL(scan_finish()), this, SLOT(on_scan_finish()), Qt::QueuedConnection);
+    connect(this, SIGNAL(sane_dev_error(QString)), this, SLOT(on_sane_dev_error(QString)), Qt::QueuedConnection);
     connect(m_dialog_log, SIGNAL(continuScan(void)), this, SLOT(on_act_acquire_triggered(void)), Qt::QueuedConnection);
     connect(m_dialog_log, SIGNAL(invoke_stop(void)), this, SLOT(on_act_acquireStop_triggered(void)), Qt::QueuedConnection);
 
@@ -716,6 +717,12 @@ void MainWindow::on_sane_dev_remove(QString devName)
     }
 }
 
+void MainWindow::on_sane_dev_error(QString errorInfo)
+{
+    m_wndStatusBar->setDeviceStatusInfo(errorInfo);
+    m_dialog_log->add_log(errorInfo, true);
+}
+
 bool MainWindow::eventFilter(QObject *obj, QEvent *event)
 {
     if(obj == m_view)
@@ -1627,6 +1634,8 @@ int MainWindow::sane_ex_callback(SANE_Handle hdev, int code, void *data, unsigne
         break;
     case SANE_EVENT_ERROR:
         {
+            QString errorInfo((char*)data);
+            emit p->sane_dev_error(errorInfo);
         }
         break;
     case SANE_EVENT_WORKING:
@@ -2039,7 +2048,14 @@ void MainWindow::on_act_acquire_triggered()
     }
 #else
     if (nullptr != m_saneDeviceHandle)
-        sane_start(m_saneDeviceHandle);
+    {
+        SANE_Status ret = sane_start(m_saneDeviceHandle);
+        if(ret != SANE_STATUS_GOOD)
+        {
+            m_wndStatusBar->setDeviceStatusInfo(tr("start failed"));
+            m_dialog_log->add_log(tr("start failed"), true);
+        }
+    }
 #endif
 }
 
@@ -2091,7 +2107,14 @@ void MainWindow::on_act_acquireInto_triggered()
         }
 #else
         if (nullptr != m_saneDeviceHandle)
-            sane_start(m_saneDeviceHandle);
+        {
+            SANE_Status ret = sane_start(m_saneDeviceHandle);
+            if(ret != SANE_STATUS_GOOD)
+            {
+                m_wndStatusBar->setDeviceStatusInfo(tr("start failed"));
+                m_dialog_log->add_log(tr("start failed"), true);
+            }
+        }
 #endif
     }
 }

app/scanner/mainwindow.h

@@ -82,6 +82,7 @@ signals:
 #if !defined(HG_CMP_MSC) || !defined(APP_USE_TWAIN)
     void sane_dev_arrive(QString devName);
     void sane_dev_remove(QString devName);
+    void sane_dev_error(QString errorInfo);
 #endif
     void new_image(void *img);
     void scan_working();
@@ -105,6 +106,7 @@ private slots:
     void on_devMenu_action_triggered();
     void on_sane_dev_arrive(QString devName);
     void on_sane_dev_remove(QString devName);
+    void on_sane_dev_error(QString errorInfo);
     virtual bool eventFilter(QObject* obj, QEvent* event) override;
 #endif
     void on_new_image(void *img);