[Feature #881] Raise OpenCS New Window After Re-execution

The OpenCS startup window of the existing exist is raised when trying to
start a new instance. This is done by the new instance connection to the
existing instance's QLocalServer. Once the connection is established the
existing instance raises the startup window.

apps/opencs/editor.cpp

@@ -10,6 +10,8 @@
 
 CS::Editor::Editor() : mViewManager (mDocumentManager)
 {
+	ipcServerName = "IPCServer";
+
     connect (&mViewManager, SIGNAL (newDocumentRequest ()), this, SLOT (createDocument ()));
     connect (&mViewManager, SIGNAL (loadDocumentRequest ()), this, SLOT (loadDocument ()));
 
@@ -116,15 +118,35 @@ void CS::Editor::createNewFile()
     mFileDialog.hide();
 }
 
+void CS::Editor::showStartup()
+{
+	if(mStartup.isHidden())
+		mStartup.show();
+	mStartup.raise();
+	mStartup.activateWindow();
+}
+
 bool CS::Editor::makeIPCServer()
 {
 	server = new QLocalServer(this);
-	if(server->listen("IPCServer"))
+
+	if(server->listen(ipcServerName))
+	{
+		connect(server, SIGNAL(newConnection()), this, SLOT(showStartup()));
 		return true;
+	}
+
 	server->close();
 	return false;
 }
 
+void CS::Editor::connectToIPCServer()
+{
+	clientToServerSocket = new QLocalSocket(this);
+	clientToServerSocket->connectToServer(ipcServerName);
+	clientToServerSocket->close();
+}
+
 int CS::Editor::run()
 {
     mStartup.show();

apps/opencs/editor.hpp

@@ -1,9 +1,11 @@
 #ifndef CS_EDITOR_H
 #define CS_EDITOR_H
 
+#include <QObject>
+#include <QString>
 #include <QLocalServer>
+#include <QLocalSocket>
 
-#include <QObject>
 #ifndef Q_MOC_RUN
 #include <components/files/configurationmanager.hpp>
 #endif
@@ -38,6 +40,7 @@ namespace CS
             Editor();
 
             bool makeIPCServer();
+            void connectToIPCServer();
 
             int run();
             ///< \return error status
@@ -50,9 +53,13 @@ namespace CS
             void openFiles();
             void createNewFile();
 
+            void showStartup();
+
         private:
 
+            QString ipcServerName;
             QLocalServer *server;
+            QLocalSocket *clientToServerSocket;
     };
 }
 

apps/opencs/main.cpp

@@ -41,6 +41,7 @@ int main(int argc, char *argv[])
 
     if(!editor.makeIPCServer())
     {
+    	editor.connectToIPCServer();
     	return 0;
     }