Add disabled switch tab while preview.

src/stylesheet/Dark2.css

@@ -1036,3 +1036,8 @@ QLabel#resetCode {
     stop: 1.0 darkgray);
 }
 
+QTabBar::tab::disabled {
+    color: #606060;
+    background: #3c3c3c
+}
+

src/windows/MainWindow.cpp

@@ -54,6 +54,28 @@ MainWindow::MainWindow(QWidget* aParent)
     connect(DeviceManager::Default(), &DeviceManager::initializeProgress, mInitializWidget, &InitializeWidget::setMessage);
     connect(DeviceManager::Default(), &DeviceManager::shutdownDmsSended, this, &MainWindow::showShutdownWidget);
     connect(DeviceManager::Default(), &DeviceManager::shutdownDmsFailed, this, &MainWindow::processShutdownDmsFailed);
+    connect(DeviceManager::Default(), &DeviceManager::startPreviewScanResult, this, [this](bool aIsSucceed)
+    {
+        if(aIsSucceed)
+        {
+            for(int i=0; i<mTabWidget->count(); ++i)
+            {
+                if(i != mTabWidget->currentIndex())
+                {
+                    mTabWidget->setTabEnabled(i, false);
+                }
+            }
+        }
+    });
+
+    connect(EventCenter::Default(), &EventCenter::RequestPreviewStop, this, [this]()
+    {
+        for(int i=0; i<mTabWidget->count(); ++i)
+        {
+            mTabWidget->setTabEnabled(i, true);
+        }
+    });
+
     connect(EventCenter::Default(), &EventCenter::LoginSuccess, this, [this]()
     {
         mInitializWidget->setVisible(false);