Merge #17965: qt: Revert changes of pr17943

70e4706093fd7b08a32f9638dace178852a9d249 Revert "refactor: Remove never used default parameter" (Hennadii Stepanov)
219417b388a0373f9eb71446e1b0499ab55dd3e2 Revert "refactor: Simplify connection syntax" (Hennadii Stepanov)

Pull request description:

  The code, the `bool* ret = nullptr` parameter in the `BitcoinGUI::message()` slot, removed in #17943 is not dead actually. It is used in `ThreadSafeMessageBox()` function:
  https://github.com/bitcoin/bitcoin/blob/a654626f076a72416a3d354218d7107571d6caaf/src/qt/bitcoingui.cpp#L1363-L1368

  Now in master (a654626f076a72416a3d354218d7107571d6caaf):
  ```
  $ ./src/qt/bitcoin-qt -prune=-1
  Error: Prune cannot be configured with a negative value.
  bitcoin-qt: qt/bitcoingui.cpp:1369: bool ThreadSafeMessageBox(BitcoinGUI*, const string&, const string&, unsigned int): Assertion `invoked' failed.
  Aborted (core dumped)
  ```

  This PR reverts all commits of #17943

  Additional notes: the bug was missed due to dynamic function call `QMetaObject::invokeMethod()` which cannot be checked at compile time. See #16348 for more discussion.

  Sorry for introducing a bug.

ACKs for top commit:
  Sjors:
    ACK 70e4706093fd7b08a32f9638dace178852a9d249
  laanwj:
    ACK 70e4706093fd7b08a32f9638dace178852a9d249

Tree-SHA512: b968a026eaa4f5f39fd36ddc715d8e233f3c6420e6580f11d4ca422a5ff5d1d9d3df9ac11b353c3d4f434d67d6a69e37d2e26b8248d72bedd14ecba0a545a327

1 files changed, 7 insertions, 3 deletions

diff --git a/src/qt/bitcoingui.cpp b/src/qt/bitcoingui.cpp
index 6043e93f92..f22d33bf0a 100644
--- a/src/qt/bitcoingui.cpp
+++ b/src/qt/bitcoingui.cpp
@@ -564,7 +564,9 @@ void BitcoinGUI::setClientModel(ClientModel *_clientModel)
         connect(_clientModel, &ClientModel::numBlocksChanged, this, &BitcoinGUI::setNumBlocks);
 
         // Receive and report messages from client model
-        connect(_clientModel, &ClientModel::message, this, &BitcoinGUI::message);
+        connect(_clientModel, &ClientModel::message, [this](const QString &title, const QString &message, unsigned int style){
+            this->message(title, message, style);
+        });
 
         // Show progress dialog
         connect(_clientModel, &ClientModel::showProgress, this, &BitcoinGUI::showProgress);
@@ -1025,7 +1027,7 @@ void BitcoinGUI::setNumBlocks(int count, const QDateTime& blockDate, double nVer
     progressBar->setToolTip(tooltip);
 }
 
-void BitcoinGUI::message(const QString& title, QString message, unsigned int style)
+void BitcoinGUI::message(const QString& title, QString message, unsigned int style, bool* ret)
 {
     // Default title. On macOS, the window title is ignored (as required by the macOS Guidelines).
     QString strTitle{PACKAGE_NAME};
@@ -1079,7 +1081,9 @@ void BitcoinGUI::message(const QString& title, QString message, unsigned int sty
         showNormalIfMinimized();
         QMessageBox mBox(static_cast<QMessageBox::Icon>(nMBoxIcon), strTitle, message, buttons, this);
         mBox.setTextFormat(Qt::PlainText);
-        mBox.exec();
+        int r = mBox.exec();
+        if (ret != nullptr)
+            *ret = r == QMessageBox::Ok;
     } else {
         notificator->notify(static_cast<Notificator::Class>(nNotifyIcon), strTitle, message);
     }