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Merge bitcoin-core/gui#336: Do not exit and re-enter main event loop during shutdown

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451ca244db qt, refactor: Drop intermediate BitcoinApplication::shutdownResult slot (Hennadii Stepanov)
f3a17bbe5f qt: Do not exit and re-enter main event loop during shutdown (Hennadii Stepanov)
b4e0d2c431 qt, refactor: Allocate SendConfirmationDialog instances on heap (Hennadii Stepanov)
332dea2852 qt, refactor: Keep HelpMessageDialog in the main event loop (Hennadii Stepanov)
c8bae37a7a qt, refactor: Keep PSBTOperationsDialog in the main event loop (Hennadii Stepanov)
7fa91e8312 qt, refactor: Keep AskPassphraseDialog in the main event loop (Hennadii Stepanov)
6f6fde30e7 qt, refactor: Keep EditAddressDialog in the main event loop (Hennadii Stepanov)
59f7ba4fd7 qt, refactor: Keep CoinControlDialog in the main event loop (Hennadii Stepanov)
7830cd0b35 qt, refactor: Keep OptionsDialog in the main event loop (Hennadii Stepanov)
13f618818d qt: Add GUIUtil::ShowModalDialogAndDeleteOnClose (Hennadii Stepanov)

Pull request description:

  On master (1ef34ee25e) during shutdown `QApplication` exits the main event loop, then re-enter again.

  This PR streamlines shutdown process by removing the need to interrupt the main event loop, that is required for #59.

  Also, blocking [`QDialog::exec()`](https://doc.qt.io/qt-5/qdialog.html#exec) calls are replaced with safer [`QDialog::show()`](https://doc.qt.io/qt-5/qwidget.html#show), except for `SendConfirmationDialog` as that change is not trivial (marked as TODO).

  The [`QDialog::open()`](https://doc.qt.io/qt-5/qdialog.html#open) was not used because the actual modality mode (application modal or window modal) of a dialog depends on whether it has a parent.

  This PR does not change behavior, and all touched dialogs are still application modal.
  As a follow up, a design research could suggest to make some dialogs window modal.

  NOTE for reviewers: quitting app while a dialog is open (e.g., via systray icon menu) must work fine.

ACKs for top commit:
  laanwj:
    Code review and lighly tested ACK 451ca244db
  promag:
    ACK 451ca244db, just changed signal to `quitRequested`.

Tree-SHA512: ef01ab6ed803b202e776019a4e1f592e816f7bc786e00574b25a0bf16be2374ddf9db21f0a26da08700df7ef0ab9e879550df46dcfe3b6d940f5ed02ca5f8447
This commit is contained in:
W. J. van der Laan
2021-09-30 10:26:37 +02:00
parent f52929063f 451ca244db
commit 81e7748bc1
14 changed files with 75 additions and 60 deletions
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13
src/qt/sendcoinsdialog.cpp
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@@ -399,9 +399,10 @@ void SendCoinsDialog::sendButtonClicked([[maybe_unused]] bool checked)
const QString confirmation = model->wallet().privateKeysDisabled() && !model->wallet().hasExternalSigner() ? tr("Confirm transaction proposal") : tr("Confirm send coins");
const QString confirmButtonText = model->wallet().privateKeysDisabled() && !model->wallet().hasExternalSigner() ? tr("Create Unsigned") : tr("Sign and send");
SendConfirmationDialog confirmationDialog(confirmation, question_string, informative_text, detailed_text, SEND_CONFIRM_DELAY, confirmButtonText, this);
confirmationDialog.exec();
QMessageBox::StandardButton retval = static_cast<QMessageBox::StandardButton>(confirmationDialog.result());
auto confirmationDialog = new SendConfirmationDialog(confirmation, question_string, informative_text, detailed_text, SEND_CONFIRM_DELAY, confirmButtonText, this);
confirmationDialog->setAttribute(Qt::WA_DeleteOnClose);
// TODO: Replace QDialog::exec() with safer QDialog::show().
const auto retval = static_cast<QMessageBox::StandardButton>(confirmationDialog->exec());
if(retval != QMessageBox::Yes)
{
@@ -914,9 +915,9 @@ void SendCoinsDialog::coinControlFeatureChanged(bool checked)
// Coin Control: button inputs -> show actual coin control dialog
void SendCoinsDialog::coinControlButtonClicked()
{
CoinControlDialog dlg(*m_coin_control, model, platformStyle);
dlg.exec();
coinControlUpdateLabels();
auto dlg = new CoinControlDialog(*m_coin_control, model, platformStyle);
connect(dlg, &QDialog::finished, this, &SendCoinsDialog::coinControlUpdateLabels);
GUIUtil::ShowModalDialogAndDeleteOnClose(dlg);
}
// Coin Control: checkbox custom change address