[Qt] disconnect peers from peers tab via context menu

- It is now allowed to disconnect peers from peers tab via
  right-click context menu. Peers are not permanently banned!

src/qt/guiutil.cpp

@@ -265,6 +265,19 @@ void copyEntryData(QAbstractItemView *view, int column, int role)
     }
 }
 
+QString getEntryData(QAbstractItemView *view, int column, int role)
+{
+    if(!view || !view->selectionModel())
+        return QString();
+    QModelIndexList selection = view->selectionModel()->selectedRows(column);
+
+    if(!selection.isEmpty()) {
+        // Return first item
+        return (selection.at(0).data(role).toString());
+    }
+    return QString();
+}
+
 QString getSaveFileName(QWidget *parent, const QString &caption, const QString &dir,
     const QString &filter,
     QString *selectedSuffixOut)

src/qt/guiutil.h

@@ -64,6 +64,14 @@ namespace GUIUtil
      */
     void copyEntryData(QAbstractItemView *view, int column, int role=Qt::EditRole);
 
+    /** Return a field of the currently selected entry as a QString. Does nothing if nothing
+        is selected.
+       @param[in] column  Data column to extract from the model
+       @param[in] role    Data role to extract from the model
+       @see  TransactionView::copyLabel, TransactionView::copyAmount, TransactionView::copyAddress
+     */
+    QString getEntryData(QAbstractItemView *view, int column, int role);
+
     void setClipboard(const QString& str);
 
     /** Get save filename, mimics QFileDialog::getSaveFileName, except that it appends a default suffix
@@ -205,7 +213,7 @@ namespace GUIUtil
 #else
     typedef QProgressBar ProgressBar;
 #endif
-    
+
 } // namespace GUIUtil
 
 #endif // BITCOIN_QT_GUIUTIL_H

src/qt/rpcconsole.cpp

@@ -25,6 +25,7 @@
 #endif
 
 #include <QKeyEvent>
+#include <QMenu>
 #include <QScrollBar>
 #include <QThread>
 #include <QTime>
@@ -205,7 +206,8 @@ RPCConsole::RPCConsole(QWidget *parent) :
     ui(new Ui::RPCConsole),
     clientModel(0),
     historyPtr(0),
-    cachedNodeid(-1)
+    cachedNodeid(-1),
+    contextMenu(0)
 {
     ui->setupUi(this);
     GUIUtil::restoreWindowGeometry("nRPCConsoleWindow", this->size(), this);
@@ -305,10 +307,22 @@ void RPCConsole::setClientModel(ClientModel *model)
         ui->peerWidget->setEditTriggers(QAbstractItemView::NoEditTriggers);
         ui->peerWidget->setSelectionBehavior(QAbstractItemView::SelectRows);
         ui->peerWidget->setSelectionMode(QAbstractItemView::SingleSelection);
+        ui->peerWidget->setContextMenuPolicy(Qt::CustomContextMenu);
         ui->peerWidget->setColumnWidth(PeerTableModel::Address, ADDRESS_COLUMN_WIDTH);
         ui->peerWidget->setColumnWidth(PeerTableModel::Subversion, SUBVERSION_COLUMN_WIDTH);
         ui->peerWidget->setColumnWidth(PeerTableModel::Ping, PING_COLUMN_WIDTH);
 
+        // create context menu actions
+        QAction* disconnectAction = new QAction(tr("&Disconnect Node"), this);
+
+        // create context menu
+        contextMenu = new QMenu();
+        contextMenu->addAction(disconnectAction);
+
+        // context menu signals
+        connect(ui->peerWidget, SIGNAL(customContextMenuRequested(const QPoint&)), this, SLOT(showMenu(const QPoint&)));
+        connect(disconnectAction, SIGNAL(triggered()), this, SLOT(disconnectSelectedNode()));
+
         // connect the peerWidget selection model to our peerSelected() handler
         connect(ui->peerWidget->selectionModel(), SIGNAL(selectionChanged(const QItemSelection &, const QItemSelection &)),
              this, SLOT(peerSelected(const QItemSelection &, const QItemSelection &)));
@@ -659,3 +673,21 @@ void RPCConsole::hideEvent(QHideEvent *event)
     // stop PeerTableModel auto refresh
     clientModel->getPeerTableModel()->stopAutoRefresh();
 }
+
+void RPCConsole::showMenu(const QPoint& point)
+{
+    QModelIndex index = ui->peerWidget->indexAt(point);
+    if (index.isValid())
+        contextMenu->exec(QCursor::pos());
+}
+
+void RPCConsole::disconnectSelectedNode()
+{
+    // Get currently selected peer address
+    QString strNode = GUIUtil::getEntryData(ui->peerWidget, 0, PeerTableModel::Address);
+    // Find the node, disconnect it and clear the selected node
+    if (CNode *bannedNode = FindNode(strNode.toStdString())) {
+        bannedNode->CloseSocketDisconnect();
+        ui->peerWidget->selectionModel()->clearSelection();
+    }
+}

src/qt/rpcconsole.h

@@ -19,6 +19,7 @@ namespace Ui {
 }
 
 QT_BEGIN_NAMESPACE
+class QMenu;
 class QItemSelection;
 QT_END_NAMESPACE
 
@@ -57,6 +58,8 @@ private slots:
     void resizeEvent(QResizeEvent *event);
     void showEvent(QShowEvent *event);
     void hideEvent(QHideEvent *event);
+    /** Show custom context menu on Peers tab */
+    void showMenu(const QPoint& point);
 
 public slots:
     void clear();
@@ -73,6 +76,8 @@ public slots:
     void peerSelected(const QItemSelection &selected, const QItemSelection &deselected);
     /** Handle updated peer information */
     void peerLayoutChanged();
+	/** Disconnect a selected node on the Peers tab */
+    void disconnectSelectedNode();
 
 signals:
     // For RPC command executor
@@ -98,6 +103,7 @@ private:
     QStringList history;
     int historyPtr;
     NodeId cachedNodeid;
+    QMenu *contextMenu;
 };
 
 #endif // BITCOIN_QT_RPCCONSOLE_H