Merge bitcoin-core/gui#256: Save/restore column sizes of the tables in the Peers tab

fb1b1e0f3eae32b087347889ed7502b7f2c48549 qt: Save/restore column sizes of the tables in the Peers tab (Hennadii Stepanov)

Pull request description:

ACKs for top commit:
  jonatack:
    ACK fb1b1e0f3eae32b087347889ed7502b7f2c48549 code review, debug-built and tested
  jarolrod:
    ACK fb1b1e0f3eae32b087347889ed7502b7f2c48549

Tree-SHA512: f93495ecd13e4202aba61b407fffbeec855f5b0c1cc027197c78edddd7d11c87ebdb0fcb1daac242f0407323b31f4e7e0313bd76113a5241e4c868a8829af20a

src/qt/rpcconsole.cpp

@@ -505,6 +505,9 @@ RPCConsole::RPCConsole(interfaces::Node& node, QWidget* parent, Qt::WindowFlags
         ui->splitter->restoreState(settings.value("RPCConsoleWidgetPeersTabSplitterSizes").toByteArray());
     }
 
+    m_peer_widget_header_state = settings.value("PeersTabPeerHeaderState").toByteArray();
+    m_banlist_widget_header_state = settings.value("PeersTabBanlistHeaderState").toByteArray();
+
     constexpr QChar nonbreaking_hyphen(8209);
     const std::vector<QString> CONNECTION_TYPE_DOC{
         //: Explanatory text for an inbound peer connection.
@@ -610,6 +613,9 @@ RPCConsole::~RPCConsole()
         settings.setValue("RPCConsoleWidgetPeersTabSplitterSizes", ui->splitter->saveState());
     }
 
+    settings.setValue("PeersTabPeerHeaderState", m_peer_widget_header_state);
+    settings.setValue("PeersTabBanlistHeaderState", m_banlist_widget_header_state);
+
     m_node.rpcUnsetTimerInterface(rpcTimerInterface);
     delete rpcTimerInterface;
     delete pageButtons;
@@ -701,9 +707,12 @@ void RPCConsole::setClientModel(ClientModel *model, int bestblock_height, int64_
         ui->peerWidget->setSelectionBehavior(QAbstractItemView::SelectRows);
         ui->peerWidget->setSelectionMode(QAbstractItemView::ExtendedSelection);
         ui->peerWidget->setContextMenuPolicy(Qt::CustomContextMenu);
+
+        if (!ui->peerWidget->horizontalHeader()->restoreState(m_peer_widget_header_state)) {
             ui->peerWidget->setColumnWidth(PeerTableModel::Address, ADDRESS_COLUMN_WIDTH);
             ui->peerWidget->setColumnWidth(PeerTableModel::Subversion, SUBVERSION_COLUMN_WIDTH);
             ui->peerWidget->setColumnWidth(PeerTableModel::Ping, PING_COLUMN_WIDTH);
+        }
         ui->peerWidget->horizontalHeader()->setStretchLastSection(true);
         ui->peerWidget->setItemDelegateForColumn(PeerTableModel::NetNodeId, new PeerIdViewDelegate(this));
 
@@ -726,8 +735,11 @@ void RPCConsole::setClientModel(ClientModel *model, int bestblock_height, int64_
         ui->banlistWidget->setSelectionBehavior(QAbstractItemView::SelectRows);
         ui->banlistWidget->setSelectionMode(QAbstractItemView::SingleSelection);
         ui->banlistWidget->setContextMenuPolicy(Qt::CustomContextMenu);
+
+        if (!ui->banlistWidget->horizontalHeader()->restoreState(m_banlist_widget_header_state)) {
             ui->banlistWidget->setColumnWidth(BanTableModel::Address, BANSUBNET_COLUMN_WIDTH);
             ui->banlistWidget->setColumnWidth(BanTableModel::Bantime, BANTIME_COLUMN_WIDTH);
+        }
         ui->banlistWidget->horizontalHeader()->setStretchLastSection(true);
 
         // create ban table context menu
@@ -1357,6 +1369,11 @@ void RPCConsole::showEvent(QShowEvent *event)
 
 void RPCConsole::hideEvent(QHideEvent *event)
 {
+    // It is too late to call QHeaderView::saveState() in ~RPCConsole(), as all of
+    // the columns of QTableView child widgets will have zero width at that moment.
+    m_peer_widget_header_state = ui->peerWidget->horizontalHeader()->saveState();
+    m_banlist_widget_header_state = ui->banlistWidget->horizontalHeader()->saveState();
+
     QWidget::hideEvent(event);
 
     if (!clientModel || !clientModel->getPeerTableModel())

src/qt/rpcconsole.h

@@ -12,9 +12,10 @@
 #include <net.h>
 #include <uint256.h>
 
-#include <QWidget>
+#include <QByteArray>
 #include <QCompleter>
 #include <QThread>
+#include <QWidget>
 
 class ClientModel;
 class RPCTimerInterface;
@@ -190,6 +191,8 @@ private:
     QThread thread;
     WalletModel* m_last_wallet_model{nullptr};
     bool m_is_executing{false};
+    QByteArray m_peer_widget_header_state;
+    QByteArray m_banlist_widget_header_state;
 
     /** Update UI with latest network info from model. */
     void updateNetworkState();