增加状态栏显示设备连接状态

app/scanner/mainwindow.cpp

@@ -212,6 +212,7 @@ MainWindow::MainWindow(QWidget *parent)
     m_saneNoDevAction = new QAction(tr("nodevice"), this);
     m_saneNoDevAction->setEnabled(false);
     ui->menu_device->addAction(m_saneNoDevAction);
+    m_wndStatusBar->setDeviceStatusInfo(m_saneNoDevAction->text());
 
     m_saneDeviceAction = nullptr;
     m_saneDeviceHandle = nullptr;
@@ -653,6 +654,7 @@ void MainWindow::on_sane_dev_arrive(QString devName)
             {
                 m_saneDeviceAction = action_dev;
                 action_dev->setChecked(true);
+                m_wndStatusBar->setDeviceStatusInfo(devName + tr(" already connected"));
             }
         }
     }
@@ -690,6 +692,8 @@ void MainWindow::on_sane_dev_remove(QString devName)
         {
             ui->menu_device->addAction(m_saneNoDevAction);
         }
+
+        m_wndStatusBar->setDeviceStatusInfo(m_saneNoDevAction->text());
     }
 }
 #endif