Merge bitcoin-core/gui#739: Disable and uncheck blank when private keys are disabled

9ea31eba04 gui: Disable and uncheck blank when private keys are disabled (Andrew Chow)

Pull request description:

  Unify the GUI's create wallet with the RPC createwallet so that the blank flag is not set when private keys are disabled.

ACKs for top commit:
  S3RK:
    Code review ACK 9ea31eba04
  jarolrod:
    ACK 9ea31eba04
  pablomartin4btc:
    tACK 9ea31eba04

Tree-SHA512: 0c90dbd77e66f088c6a57711a4b91e254814c4ee301ab703807f281cacd4b08712d2dfeac7661f28bc0e93acc55d486a17b8b4a53ffa57093d992e7a3c51f4e8

src/qt/createwalletdialog.cpp

@@ -58,10 +58,7 @@ CreateWalletDialog::CreateWalletDialog(QWidget* parent) :
         ui->descriptor_checkbox->setChecked(checked);
         ui->encrypt_wallet_checkbox->setChecked(false);
         ui->disable_privkeys_checkbox->setChecked(checked);
-        // The blank check box is ambiguous. This flag is always true for a
-        // watch-only wallet, even though we immedidately fetch keys from the
-        // external signer.
-        ui->blank_wallet_checkbox->setChecked(checked);
+        ui->blank_wallet_checkbox->setChecked(false);
     });
 
     connect(ui->disable_privkeys_checkbox, &QCheckBox::toggled, [this](bool checked) {
@@ -69,9 +66,10 @@ CreateWalletDialog::CreateWalletDialog(QWidget* parent) :
         // set to true, enable it when isDisablePrivateKeysChecked is false.
         ui->encrypt_wallet_checkbox->setEnabled(!checked);
 
-        // Wallets without private keys start out blank
+        // Wallets without private keys cannot set blank
+        ui->blank_wallet_checkbox->setEnabled(!checked);
         if (checked) {
-            ui->blank_wallet_checkbox->setChecked(true);
+            ui->blank_wallet_checkbox->setChecked(false);
         }
 
         // When the encrypt_wallet_checkbox is disabled, uncheck it.
@@ -81,8 +79,11 @@ CreateWalletDialog::CreateWalletDialog(QWidget* parent) :
     });
 
     connect(ui->blank_wallet_checkbox, &QCheckBox::toggled, [this](bool checked) {
-        if (!checked) {
-          ui->disable_privkeys_checkbox->setChecked(false);
+        // Disable the disable_privkeys_checkbox when blank_wallet_checkbox is checked
+        // as blank-ness only pertains to wallets with private keys.
+        ui->disable_privkeys_checkbox->setEnabled(!checked);
+        if (checked) {
+            ui->disable_privkeys_checkbox->setChecked(false);
         }
     });