Merge #16432: qt: Add privacy to the Overview page

8d75115844baefe5cad4d82ec8dce001dd16eb9c qt: Add privacy feature to Overview page (Hennadii Stepanov)
73d8ef72742ab9193e9e95158b26176bfaab3f66 qt: Add BitcoinUnits::formatWithPrivacy() function (Hennadii Stepanov)

Pull request description:

  This PR allows to hide/reveal values on the Overviewpage by checking/unchecking Menu->Settings-> Mask Values

  Closes #16407

  Privacy mode is OFF (the default behavior):
  ![Screenshot from 2020-01-02 15-08-28](https://user-images.githubusercontent.com/32963518/71669074-28ab6980-2d74-11ea-8e54-4973aa307192.png)

  Privacy mode is ON:
  ![Screenshot from 2020-01-02 15-10-23 cropped](https://user-images.githubusercontent.com/32963518/71669082-2d701d80-2d74-11ea-9df5-d4acc4982dbe.png)

ACKs for top commit:
  jonatack:
    Tested ACK 8d75115
  jonasschnelli:
    Tested ACK 8d75115844baefe5cad4d82ec8dce001dd16eb9c

Tree-SHA512: 42f396d5bf0d343b306fb7e925f86f66b3fc3a257af370a812f4be181b5269298f9b23bd8a3ce25ab61de92908c4018d8c2dc8591d11bc58d79c4eb7206fc6ec

1 files changed, 15 insertions, 0 deletions

diff --git a/src/qt/bitcoingui.cpp b/src/qt/bitcoingui.cpp
index 2090c233ac..6192013e5f 100644
--- a/src/qt/bitcoingui.cpp
+++ b/src/qt/bitcoingui.cpp
@@ -354,6 +354,11 @@ void BitcoinGUI::createActions()
     showHelpMessageAction->setMenuRole(QAction::NoRole);
     showHelpMessageAction->setStatusTip(tr("Show the %1 help message to get a list with possible Bitcoin command-line options").arg(PACKAGE_NAME));
 
+    m_mask_values_action = new QAction(tr("&Mask values"), this);
+    m_mask_values_action->setShortcut(QKeySequence(Qt::CTRL + Qt::SHIFT + Qt::Key_M));
+    m_mask_values_action->setStatusTip(tr("Mask the values in the Overview tab"));
+    m_mask_values_action->setCheckable(true);
+
     connect(quitAction, &QAction::triggered, qApp, QApplication::quit);
     connect(aboutAction, &QAction::triggered, this, &BitcoinGUI::aboutClicked);
     connect(aboutQtAction, &QAction::triggered, qApp, QApplication::aboutQt);
@@ -416,6 +421,8 @@ void BitcoinGUI::createActions()
             connect(activity, &CreateWalletActivity::finished, activity, &QObject::deleteLater);
             activity->create();
         });
+
+        connect(m_mask_values_action, &QAction::toggled, this, &BitcoinGUI::setPrivacy);
     }
 #endif // ENABLE_WALLET
 
@@ -456,6 +463,8 @@ void BitcoinGUI::createMenuBar()
         settings->addAction(encryptWalletAction);
         settings->addAction(changePassphraseAction);
         settings->addSeparator();
+        settings->addAction(m_mask_values_action);
+        settings->addSeparator();
     }
     settings->addAction(optionsAction);
 
@@ -1414,6 +1423,12 @@ void BitcoinGUI::unsubscribeFromCoreSignals()
     m_handler_question->disconnect();
 }
 
+bool BitcoinGUI::isPrivacyModeActivated() const
+{
+    assert(m_mask_values_action);
+    return m_mask_values_action->isChecked();
+}
+
 UnitDisplayStatusBarControl::UnitDisplayStatusBarControl(const PlatformStyle *platformStyle) :
     optionsModel(nullptr),
     menu(nullptr)