gui: reset options, notify user about the backup creation

src/qt/bitcoingui.cpp

@@ -999,6 +999,7 @@ void BitcoinGUI::openOptionsDialogWithTab(OptionsDialog::Tab tab)
     auto dlg = new OptionsDialog(this, enableWallet);
     connect(dlg, &OptionsDialog::quitOnReset, this, &BitcoinGUI::quitRequested);
     dlg->setCurrentTab(tab);
+    dlg->setClientModel(clientModel);
     dlg->setModel(clientModel->getOptionsModel());
     GUIUtil::ShowModalDialogAsynchronously(dlg);
 }

src/qt/optionsdialog.cpp

@@ -10,6 +10,7 @@
 #include <qt/forms/ui_optionsdialog.h>
 
 #include <qt/bitcoinunits.h>
+#include <qt/clientmodel.h>
 #include <qt/guiconstants.h>
 #include <qt/guiutil.h>
 #include <qt/optionsmodel.h>
@@ -168,6 +169,11 @@ OptionsDialog::~OptionsDialog()
     delete ui;
 }
 
+void OptionsDialog::setClientModel(ClientModel* client_model)
+{
+    m_client_model = client_model;
+}
+
 void OptionsDialog::setModel(OptionsModel *_model)
 {
     this->model = _model;
@@ -278,11 +284,12 @@ void OptionsDialog::setOkButtonState(bool fState)
 
 void OptionsDialog::on_resetButton_clicked()
 {
-    if(model)
+    if (model) {
-    {
         // confirmation dialog
         QMessageBox::StandardButton btnRetVal = QMessageBox::question(this, tr("Confirm options reset"),
-            tr("Client restart required to activate changes.") + "<br><br>" + tr("Client will be shut down. Do you want to proceed?"),
+            tr("Client restart required to activate changes.") + "<br><br>" +
+            tr("Current settings will be backed up at \"%1\".").arg(m_client_model->dataDir()) + "<br><br>" +
+            tr("Client will be shut down. Do you want to proceed?"),
             QMessageBox::Yes | QMessageBox::Cancel, QMessageBox::Cancel);
 
         if (btnRetVal == QMessageBox::Cancel)

src/qt/optionsdialog.h

@@ -8,6 +8,7 @@
 #include <QDialog>
 #include <QValidator>
 
+class ClientModel;
 class OptionsModel;
 class QValidatedLineEdit;
 
@@ -45,6 +46,7 @@ public:
         TAB_NETWORK,
     };
 
+    void setClientModel(ClientModel* client_model);
     void setModel(OptionsModel *model);
     void setMapper();
     void setCurrentTab(OptionsDialog::Tab tab);
@@ -72,6 +74,7 @@ Q_SIGNALS:
 
 private:
     Ui::OptionsDialog *ui;
+    ClientModel* m_client_model{nullptr};
     OptionsModel *model;
     QDataWidgetMapper *mapper;
 };