Merge #333: refactor: Signal-slot connections cleanup

f507681 qt: Connect WalletView signal to BitcoinGUI slot directly (Hennadii Stepanov)
bd50ff9 qt: Drop redundant OverviewPage::handleOutOfSyncWarningClicks slot (Hennadii Stepanov)
793f195 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 f507681, tested on Debian Sid with Qt 5.15.2, no any behavioral changes noticed.
  promag:
    Code review ACK f507681.

Tree-SHA512: cd636a7e61881b2cbee84d5425d2107a8e39683b8eb32d79dc9ea942db55d5c1979be2f70da1660eaee5de622d10ed5a92f11fc2351de21b84324b10b23d0c96

src/qt/bitcoingui.cpp

@@ -211,11 +211,6 @@ BitcoinGUI::BitcoinGUI(interfaces::Node& node, const PlatformStyle *_platformSty
 
     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;
@@ -690,7 +685,7 @@ 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

@@ -166,8 +166,8 @@ OverviewPage::OverviewPage(const PlatformStyle *platformStyle, QWidget *parent)
 
     // start with displaying the "out of sync" warnings
     showOutOfSyncWarning(true);
-    connect(ui->labelWalletStatus, &QPushButton::clicked, this, &OverviewPage::handleOutOfSyncWarningClicks);
-    connect(ui->labelTransactionsStatus, &QPushButton::clicked, this, &OverviewPage::handleOutOfSyncWarningClicks);
+    connect(ui->labelWalletStatus, &QPushButton::clicked, this, &OverviewPage::outOfSyncWarningClicked);
+    connect(ui->labelTransactionsStatus, &QPushButton::clicked, this, &OverviewPage::outOfSyncWarningClicked);
 }
 
 void OverviewPage::handleTransactionClicked(const QModelIndex &index)
@@ -176,11 +176,6 @@ 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

@@ -65,7 +65,6 @@ private Q_SLOTS:
     void handleTransactionClicked(const QModelIndex &index);
     void updateAlerts(const QString &warnings);
     void updateWatchOnlyLabels(bool showWatchOnly);
-    void handleOutOfSyncWarningClicks();
     void setMonospacedFont(bool use_embedded_font);
 };
 

src/qt/walletframe.cpp

@@ -242,8 +242,3 @@ 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

@@ -47,9 +47,6 @@ class WalletFrame : public QFrame
     QSize sizeHint() const override { return m_size_hint; }
 
 Q_SIGNALS:
-    /** Notify that the user has requested more information about the out-of-sync warning */
-    void requestedSyncWarningInfo();
-
     void createWalletButtonClicked();
 
 private:
@@ -98,8 +95,6 @@ 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

@@ -73,7 +73,7 @@ WalletView::WalletView(const PlatformStyle *_platformStyle, QWidget *parent):
     // 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);
     // Highlight transaction after send
@@ -347,8 +347,3 @@ void WalletView::showProgress(const QString &title, int nProgress)
         }
     }
 }
-
-void WalletView::requestedSyncWarningInfo()
-{
-    Q_EMIT outOfSyncWarningClicked();
-}

src/qt/walletview.h

@@ -111,9 +111,6 @@ 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();
-
 Q_SIGNALS:
     void setPrivacy(bool privacy);
     void transactionClicked();