SYNERGY-799 Show message even if parent is hidden or minimized

ChangeLog

@@ -19,6 +19,7 @@ Enhancements:
 - #6977 Update synergy UI. Configure server
 - #6978 Update synergy UI. Settings window
 - #6981 Update synergy UI. Setup client configuration
+- #6984 Update synergy UI. Client error messages
 - #6962 | #6965 Add macOS 10.13 builder
 ===========
 

src/gui/src/ClientConnection.cpp

@@ -28,10 +28,10 @@ ClientConnection::ClientConnection(MainWindow& parent) :
 {
 }
 
-void ClientConnection::update(const QString& line) const
+void ClientConnection::update(const QString& line)
 {
-    if (m_parent.isActiveWindow() &&
+    if (line.contains("failed to connect to server") &&
-        line.contains("failed to connect to server") )
+        checkMainWindow())
     {
         m_parent.stopSynergy();
 
@@ -42,6 +42,20 @@ void ClientConnection::update(const QString& line) const
     }
 }
 
+bool ClientConnection::checkMainWindow()
+{
+    bool result = m_parent.isActiveWindow();
+
+    if (m_parent.isMinimized() || m_parent.isHidden())
+    {
+        m_parent.showNormal();
+        m_parent.activateWindow();
+        result = true;
+    }
+
+    return result;
+}
+
 QString ClientConnection::getMessage() const
 {
     QString message(QObject::tr("We can’t connect to the server IP address.\nCheck your IP on your server and your firewall settings."));

src/gui/src/ClientConnection.h

@@ -29,10 +29,11 @@ class ClientConnection
 
 public:
     explicit ClientConnection(MainWindow& parent);
-    void update(const QString& line) const;
+    void update(const QString& line);
 
 private:
     QString getMessage() const;
+    bool checkMainWindow();
 };
 
 #endif // CLIENTCONNECTION_H

src/gui/src/ServerConnection.cpp

@@ -45,13 +45,16 @@ void ServerConnection::update(const QString& line)
 
 bool ServerConnection::checkMainWindow()
 {
+    bool result = m_parent.isActiveWindow();
+
     if (m_parent.isMinimized() || m_parent.isHidden())
     {
         m_parent.showNormal();
         m_parent.activateWindow();
+        result = true;
     }
 
-    return m_parent.isActiveWindow();
+    return result;
 }
 
 void ServerConnection::addClient(const QString& clientName)