GS_PH_VERSION command, per-printhead demo UI with --printheads CLI arg

Add getPhVersion(printheadId) to Xpl2Client with phVersionReceived signal
carrying all 8 response fields. Mock server echoes canned version data for
any requested printhead ID.

Demo app accepts --printheads N (default 10) to simulate N printheads.
The UI shows a scrollable per-PH list with individual and bulk version
query buttons, updating each row's version info on response.

1 files changed, 10 insertions, 0 deletions

diff --git a/src/Xpl2Client.h b/src/Xpl2Client.h
index 41729fd..95ae03e 100644
--- a/src/Xpl2Client.h
+++ b/src/Xpl2Client.h
@@ -43,6 +43,8 @@ public:
   Q_INVOKABLE void connectToServer ();
   Q_INVOKABLE void disconnectFromServer ();
   Q_INVOKABLE void getJcVersion ();
+  /** Query the specified printhead's version info. */
+  Q_INVOKABLE void getPhVersion (int printheadId);
 
 signals:
   void hostChanged ();
@@ -50,6 +52,13 @@ signals:
   void errorOccurred (const QString &error);
   void statusMessage (const QString &message);
   void jcVersionReceived ();
+  void phVersionReceived (int controllerId, int printheadId,
+                          const QString &mcuFirmwareVersion,
+                          const QString &mcuHardwareVersion,
+                          const QString &mcuFirmwareVariant,
+                          const QString &fpgaFirmwareVersion,
+                          const QString &fpgaHardwareVersion,
+                          const QString &bootloaderVersion);
 
 private slots:
   void onSocketConnected ();
@@ -65,6 +74,7 @@ private:
   void dispatchStatusMessage (const Xpl2Protocol::ParsedMessage &msg);
   void handleKaPing (QTcpSocket &socket);
   void handleGsJcVersion (const QVariantList &params);
+  void handleGsPhVersion (const QVariantList &params);
   void updateConnectedState ();
   QString logTag (const QTcpSocket *socket) const;