Add boolean HaveWatchonly and signal NotifyWatchonlyChanged

src/qt/walletmodel.h

@@ -128,6 +128,7 @@ public:
     qint64 getBalance(const CCoinControl *coinControl = NULL) const;
     qint64 getUnconfirmedBalance() const;
     qint64 getImmatureBalance() const;
+    bool haveWatchOnly() const;
     qint64 getWatchBalance() const;
     qint64 getWatchUnconfirmedBalance() const;
     qint64 getWatchImmatureBalance() const;
@@ -198,6 +199,7 @@ public:
 private:
     CWallet *wallet;
     bool fProcessingQueuedTransactions;
+    bool fHaveWatchOnly;
 
     // Wallet has an options model for wallet-specific options
     // (transaction fee, for example)
@@ -249,6 +251,9 @@ signals:
     // Show progress dialog e.g. for rescan
     void showProgress(const QString &title, int nProgress);
 
+    // Watch-only address added
+    void notifyWatchonlyChanged(bool fHaveWatchonly);
+
 public slots:
     /* Wallet status might have changed */
     void updateStatus();
@@ -256,6 +261,8 @@ public slots:
     void updateTransaction(const QString &hash, int status);
     /* New, updated or removed address book entry */
     void updateAddressBook(const QString &address, const QString &label, bool isMine, const QString &purpose, int status);
+    /* Watchonly added */
+    void updateWatchOnlyFlag(bool fHaveWatchonly);
     /* Current, immature or unconfirmed balance might have changed - emit 'balanceChanged' if so */
     void pollBalanceChanged();
     /* Needed to update fProcessingQueuedTransactions through a QueuedConnection */