Merge bitcoin-core/gui#333: refactor: Signal-slot connections cleanup

f507681baa406046c9c3d44be39e99124a2d6e5f qt: Connect WalletView signal to BitcoinGUI slot directly (Hennadii Stepanov)
bd50ff9290ea9ec8b482db11314a6fd658373f23 qt: Drop redundant OverviewPage::handleOutOfSyncWarningClicks slot (Hennadii Stepanov)
793f19599b6d9009c2fb11e4c07e0872ff00defe qt: Drop redundant WalletView::requestedSyncWarningInfo slot (Hennadii Stepanov)

Pull request description:

  This PR:
  - removes slots whose only job is to emit a signal, since we can use the signal as a slot
  - connects the`WalletView::outOfSyncWarningClicked` signal to the `BitcoinGUI::showModalOverlay` slot directly, and removes intermediate `WalletFrame` slot and signal
  - split from #29

  This PR does not change behavior.

ACKs for top commit:
  Talkless:
    tACK f507681baa406046c9c3d44be39e99124a2d6e5f, tested on Debian Sid with Qt 5.15.2, no any behavioral changes noticed.
  promag:
    Code review ACK f507681baa406046c9c3d44be39e99124a2d6e5f.

Tree-SHA512: cd636a7e61881b2cbee84d5425d2107a8e39683b8eb32d79dc9ea942db55d5c1979be2f70da1660eaee5de622d10ed5a92f11fc2351de21b84324b10b23d0c96

src/qt/bitcoingui.cpp

@@ -224,11 +224,6 @@ BitcoinGUI::BitcoinGUI(interfaces::Node& node, const NetworkStyle* networkStyle,
     modalOverlay = new ModalOverlay(enableWallet, this->centralWidget());
     connect(labelBlocksIcon, &GUIUtil::ClickableLabel::clicked, this, &BitcoinGUI::showModalOverlay);
     connect(progressBar, &GUIUtil::ClickableProgressBar::clicked, this, &BitcoinGUI::showModalOverlay);
-#ifdef ENABLE_WALLET
-    if(enableWallet) {
-        connect(walletFrame, &WalletFrame::requestedSyncWarningInfo, this, &BitcoinGUI::showModalOverlay);
-    }
-#endif
 
 #ifdef Q_OS_MAC
     m_app_nap_inhibitor = new CAppNapInhibitor;
@@ -931,7 +926,7 @@ void BitcoinGUI::addWallet(WalletModel* walletModel)
     const QString display_name = walletModel->getDisplayName();
     m_wallet_selector->addItem(display_name, QVariant::fromValue(walletModel));
 
-    connect(wallet_view, &WalletView::outOfSyncWarningClicked, walletFrame, &WalletFrame::outOfSyncWarningClicked);
+    connect(wallet_view, &WalletView::outOfSyncWarningClicked, this, &BitcoinGUI::showModalOverlay);
     connect(wallet_view, &WalletView::transactionClicked, this, &BitcoinGUI::gotoHistoryPage);
     connect(wallet_view, &WalletView::coinsSent, this, &BitcoinGUI::gotoHistoryPage);
     connect(wallet_view, &WalletView::message, [this](const QString& title, const QString& message, unsigned int style) {

src/qt/overviewpage.cpp

@@ -199,11 +199,6 @@ void OverviewPage::handleTransactionClicked(const QModelIndex &index)
         Q_EMIT transactionClicked(filter->mapToSource(index));
 }
 
-void OverviewPage::handleOutOfSyncWarningClicks()
-{
-    Q_EMIT outOfSyncWarningClicked();
-}
-
 void OverviewPage::setPrivacy(bool privacy)
 {
     m_privacy = privacy;

src/qt/overviewpage.h

@@ -70,7 +70,6 @@ private Q_SLOTS:
     void handleTransactionClicked(const QModelIndex &index);
     void updateAlerts(const QString &warnings);
     void updateWatchOnlyLabels(bool showWatchOnly);
-    void handleOutOfSyncWarningClicks();
 };
 
 #endif // BITCOIN_QT_OVERVIEWPAGE_H

src/qt/walletframe.cpp

@@ -343,8 +343,3 @@ WalletModel* WalletFrame::currentWalletModel() const
     WalletView* wallet_view = currentWalletView();
     return wallet_view ? wallet_view->getWalletModel() : nullptr;
 }
-
-void WalletFrame::outOfSyncWarningClicked()
-{
-    Q_EMIT requestedSyncWarningInfo();
-}

src/qt/walletframe.h

@@ -50,8 +50,6 @@ public:
 
 Q_SIGNALS:
     void message(const QString& title, const QString& message, unsigned int style);
-    /** Notify that the user has requested more information about the out-of-sync warning */
-    void requestedSyncWarningInfo();
 
     void createWalletButtonClicked();
 
@@ -110,8 +108,6 @@ public Q_SLOTS:
     void usedSendingAddresses();
     /** Show used receiving addresses */
     void usedReceivingAddresses();
-    /** Pass on signal over requested out-of-sync-warning information */
-    void outOfSyncWarningClicked();
 };
 
 #endif // BITCOIN_QT_WALLETFRAME_H

src/qt/walletview.cpp

@@ -100,7 +100,7 @@ WalletView::WalletView(QWidget* parent) :
     connect(overviewPage, &OverviewPage::transactionClicked, this, &WalletView::transactionClicked);
     // Clicking on a transaction on the overview pre-selects the transaction on the transaction history page
     connect(overviewPage, &OverviewPage::transactionClicked, transactionView, qOverload<const QModelIndex&>(&TransactionView::focusTransaction));
-    connect(overviewPage, &OverviewPage::outOfSyncWarningClicked, this, &WalletView::requestedSyncWarningInfo);
+    connect(overviewPage, &OverviewPage::outOfSyncWarningClicked, this, &WalletView::outOfSyncWarningClicked);
 
     connect(sendCoinsPage, &SendCoinsDialog::coinsSent, this, &WalletView::coinsSent);
     connect(coinJoinCoinsPage, &SendCoinsDialog::coinsSent, this, &WalletView::coinsSent);
@@ -408,11 +408,6 @@ void WalletView::showProgress(const QString &title, int nProgress)
     }
 }
 
-void WalletView::requestedSyncWarningInfo()
-{
-    Q_EMIT outOfSyncWarningClicked();
-}
-
 /** Update wallet with the sum of the selected transactions */
 void WalletView::trxAmount(QString amount)
 {

src/qt/walletview.h

@@ -122,10 +122,6 @@ public Q_SLOTS:
     /** Show progress dialog e.g. for rescan */
     void showProgress(const QString &title, int nProgress);
 
-    /** User has requested more information about the out of sync state */
-    void requestedSyncWarningInfo();
-
-
     /** Update selected DASH amount from transactionview */
     void trxAmount(QString amount);
 Q_SIGNALS: