Display a "freshness" indicator instead of nr of blocks

doc/assets-attribution.txt

@@ -52,3 +52,9 @@ Designer: Jack Cai
 License: Creative Commons Attribution No Derivatives (by-nd)
 Site: http://findicons.com/icon/175944/home?id=176221#
 
+Icon: src/qt/res/icons/synced.png, 
+      src/qt/res/icons/notsynced.png
+Icon Pack: Gloss: Basic
+Designer: Momenticons
+License: Creative Commons Attribution (by) 
+Site: http://www.momenticons.com/

src/qt/bitcoin.qrc

@@ -29,6 +29,8 @@
         <file alias="history">res/icons/history.png</file>
         <file alias="overview">res/icons/overview.png</file>
         <file alias="export">res/icons/export.png</file>
+        <file alias="synced">res/icons/synced.png</file>
+        <file alias="notsynced">res/icons/notsynced.png</file>
     </qresource>
     <qresource prefix="/images">
         <file alias="about">res/images/about.png</file>

src/qt/bitcoingui.cpp

@@ -35,6 +35,7 @@
 #include <QMessageBox>
 #include <QProgressBar>
 #include <QStackedWidget>
+#include <QDateTime>
 
 #include <QDebug>
 
@@ -109,11 +110,13 @@ BitcoinGUI::BitcoinGUI(QWidget *parent):
     labelConnections = new QLabel();
     labelConnections->setFrameStyle(QFrame::Panel | QFrame::Sunken);
     labelConnections->setMinimumWidth(150);
+    labelConnections->setMaximumWidth(150);
     labelConnections->setToolTip(tr("Number of connections to other clients"));
 
     labelBlocks = new QLabel();
     labelBlocks->setFrameStyle(QFrame::Panel | QFrame::Sunken);
-    labelBlocks->setMinimumWidth(130);
+    labelBlocks->setMinimumWidth(150);
+    labelBlocks->setMaximumWidth(150);
     labelBlocks->setToolTip(tr("Number of blocks in the block chain"));
 
     // Progress bar for blocks download
@@ -314,7 +317,34 @@ void BitcoinGUI::setNumBlocks(int count)
         progressBar->setVisible(false);
     }
 
-    labelBlocks->setText(tr("%n block(s)", "", count));
+    QDateTime now = QDateTime::currentDateTime();
+    QDateTime lastBlockDate = clientModel->getLastBlockDate();
+    int secs = lastBlockDate.secsTo(now);
+    QString text;
+    QString icon = ":/icons/notsynced";
+
+    // "Up to date" icon, and outdated icon
+    if(secs < 30*60)
+    {
+        text = "Up to date";
+        icon = ":/icons/synced";
+    }
+    else if(secs < 60*60)
+    {
+        text = tr("%n minute(s) ago","",secs/60);
+    }
+    else if(secs < 24*60*60)
+    {
+        text = tr("%n hour(s) ago","",secs/(60*60));
+    }
+    else
+    {
+        text = tr("%n day(s) ago","",secs/(60*60*24));
+    }
+
+    labelBlocks->setText("<img src=\""+icon+"\"> " + text);
+    labelBlocks->setToolTip(tr("%n block(s) in total, last block was generated %1", "", count)
+                            .arg(QLocale::system().toString(lastBlockDate)));
 }
 
 void BitcoinGUI::setNumTransactions(int count)

src/qt/clientmodel.cpp

@@ -7,6 +7,7 @@
 #include "headers.h"
 
 #include <QTimer>
+#include <QDateTime>
 
 ClientModel::ClientModel(CWallet *wallet, QObject *parent) :
     QObject(parent), wallet(wallet), optionsModel(0)
@@ -30,6 +31,11 @@ int ClientModel::getNumBlocks() const
     return nBestHeight;
 }
 
+QDateTime ClientModel::getLastBlockDate() const
+{
+    return QDateTime::fromTime_t(pindexBest->GetBlockTime());
+}
+
 void ClientModel::update()
 {
     // Plainly emit all signals for now. To be more efficient this should check

src/qt/clientmodel.h

@@ -8,6 +8,10 @@ class AddressTableModel;
 class TransactionTableModel;
 class CWallet;
 
+QT_BEGIN_NAMESPACE
+class QDateTime;
+QT_END_NAMESPACE
+
 // Interface to Bitcoin network client
 class ClientModel : public QObject
 {
@@ -22,6 +26,8 @@ public:
     int getNumConnections() const;
     int getNumBlocks() const;
 
+    QDateTime getLastBlockDate() const;
+
     // Return true if client connected to testnet
     bool isTestNet() const;
     // Return true if core is doing initial block download