gui: misc external signer fixes and translation hints

src/qt/createwalletdialog.cpp

@@ -31,8 +31,9 @@ CreateWalletDialog::CreateWalletDialog(QWidget* parent) :
         // Disable the disable_privkeys_checkbox and external_signer_checkbox when isEncryptWalletChecked is
         // set to true, enable it when isEncryptWalletChecked is false.
         ui->disable_privkeys_checkbox->setEnabled(!checked);
+#ifdef ENABLE_EXTERNAL_SIGNER
         ui->external_signer_checkbox->setEnabled(!checked);
-
+#endif
         // When the disable_privkeys_checkbox is disabled, uncheck it.
         if (!ui->disable_privkeys_checkbox->isEnabled()) {
             ui->disable_privkeys_checkbox->setChecked(false);
@@ -112,7 +113,7 @@ CreateWalletDialog::~CreateWalletDialog()
     delete ui;
 }
 
-void CreateWalletDialog::setSigners(std::vector<ExternalSigner>& signers)
+void CreateWalletDialog::setSigners(const std::vector<ExternalSigner>& signers)
 {
     if (!signers.empty()) {
         ui->external_signer_checkbox->setEnabled(true);

src/qt/createwalletdialog.h

@@ -24,7 +24,7 @@ public:
     explicit CreateWalletDialog(QWidget* parent);
     virtual ~CreateWalletDialog();
 
-    void setSigners(std::vector<ExternalSigner>& signers);
+    void setSigners(const std::vector<ExternalSigner>& signers);
 
     QString walletName() const;
     bool isEncryptWalletChecked() const;

src/qt/optionsdialog.cpp

@@ -92,6 +92,11 @@ OptionsDialog::OptionsDialog(QWidget *parent, bool enableWallet) :
         ui->thirdPartyTxUrls->setVisible(false);
     }
 
+#ifndef ENABLE_EXTERNAL_SIGNER
+    //: "External signing" means using devices such as hardware wallets.
+    ui->externalSignerPath->setToolTip(tr("Compiled without external signing support (required for external signing)"));
+    ui->externalSignerPath->setEnabled(false);
+#endif
     /* Display elements init */
     QDir translations(":translations");
 

src/qt/receiverequestdialog.cpp

@@ -90,7 +90,7 @@ void ReceiveRequestDialog::setInfo(const SendCoinsRecipient &_info)
         ui->wallet_content->hide();
     }
 
-    ui->btnVerify->setVisible(this->model->wallet().hasExternalSigner());
+    ui->btnVerify->setVisible(model->wallet().hasExternalSigner());
 
     connect(ui->btnVerify, &QPushButton::clicked, [this] {
         model->displayAddress(info.address.toStdString());

src/qt/sendcoinsdialog.cpp

@@ -200,12 +200,14 @@ void SendCoinsDialog::setModel(WalletModel *_model)
         ui->optInRBF->setCheckState(Qt::Checked);
 
         if (model->wallet().hasExternalSigner()) {
+            //: "device" usually means a hardware wallet
             ui->sendButton->setText(tr("Sign on device"));
             if (gArgs.GetArg("-signer", "") != "") {
                 ui->sendButton->setEnabled(true);
                 ui->sendButton->setToolTip(tr("Connect your hardware wallet first."));
             } else {
                 ui->sendButton->setEnabled(false);
+                //: "External signer" means using devices such as hardware wallets.
                 ui->sendButton->setToolTip(tr("Set external signer script path in Options -> Wallet"));
             }
         } else if (model->wallet().privateKeysDisabled()) {
@@ -426,11 +428,13 @@ void SendCoinsDialog::sendButtonClicked([[maybe_unused]] bool checked)
                 return;
             }
             if (err == TransactionError::EXTERNAL_SIGNER_NOT_FOUND) {
+                //: "External signer" means using devices such as hardware wallets.
                 QMessageBox::critical(nullptr, tr("External signer not found"), "External signer not found");
                 send_failure = true;
                 return;
             }
             if (err == TransactionError::EXTERNAL_SIGNER_FAILED) {
+                //: "External signer" means using devices such as hardware wallets.
                 QMessageBox::critical(nullptr, tr("External signer failure"), "External signer failure");
                 send_failure = true;
                 return;