Show warning when using prerelease version

Implements #1948

- Add macro `CLIENT_VERSION_IS_RELEASE` to clientversion.h
- When running a prerelease (the above macro is `false`):
  - In UI, show an orange warning bar at the top. This will be used for other
    warnings (and alerts) as well, instead of the status bar.
  - For `bitcoind`, show the warning in the "errors" field in `getinfo`
    response.

6 files changed, 325 insertions, 288 deletions

diff --git a/src/qt/bitcoingui.cpp b/src/qt/bitcoingui.cpp
index 0d269ea210..ed0c845ed9 100644
--- a/src/qt/bitcoingui.cpp
+++ b/src/qt/bitcoingui.cpp
@@ -356,6 +356,7 @@ void BitcoinGUI::setClientModel(ClientModel *clientModel)
         // Report errors from network/worker thread
         connect(clientModel, SIGNAL(error(QString,QString,bool)), this, SLOT(error(QString,QString,bool)));
 
+        overviewPage->setClientModel(clientModel);
         rpcConsole->setClientModel(clientModel);
         addressBookPage->setOptionsModel(clientModel->getOptionsModel());
         receiveCoinsPage->setOptionsModel(clientModel->getOptionsModel());
@@ -372,8 +373,7 @@ void BitcoinGUI::setWalletModel(WalletModel *walletModel)
 
         // Put transaction list in tabs
         transactionView->setModel(walletModel);
-
-        overviewPage->setModel(walletModel);
+        overviewPage->setWalletModel(walletModel);
         addressBookPage->setModel(walletModel->getAddressTableModel());
         receiveCoinsPage->setModel(walletModel->getAddressTableModel());
         sendCoinsPage->setModel(walletModel);
@@ -481,7 +481,6 @@ void BitcoinGUI::setNumBlocks(int count, int nTotalBlocks)
         return;
     }
 
-    QString strStatusBarWarnings = clientModel->getStatusBarWarnings();
     QString tooltip;
 
     if(count < nTotalBlocks)
@@ -489,35 +488,23 @@ void BitcoinGUI::setNumBlocks(int count, int nTotalBlocks)
         int nRemainingBlocks = nTotalBlocks - count;
         float nPercentageDone = count / (nTotalBlocks * 0.01f);
 
-        if (strStatusBarWarnings.isEmpty())
-        {
-            progressBarLabel->setText(tr(clientModel->isImporting() ? "Importing blocks..." : "Synchronizing with network..."));
-            progressBarLabel->setVisible(true);
-            progressBar->setFormat(tr("~%n block(s) remaining", "", nRemainingBlocks));
-            progressBar->setMaximum(nTotalBlocks);
-            progressBar->setValue(count);
-            progressBar->setVisible(true);
-        }
+        progressBarLabel->setText(tr(clientModel->isImporting() ? "Importing blocks..." : "Synchronizing with network..."));
+        progressBarLabel->setVisible(true);
+        progressBar->setFormat(tr("~%n block(s) remaining", "", nRemainingBlocks));
+        progressBar->setMaximum(nTotalBlocks);
+        progressBar->setValue(count);
+        progressBar->setVisible(true);
 
         tooltip = tr("Downloaded %1 of %2 blocks of transaction history (%3% done).").arg(count).arg(nTotalBlocks).arg(nPercentageDone, 0, 'f', 2);
     }
     else
     {
-        if (strStatusBarWarnings.isEmpty())
-            progressBarLabel->setVisible(false);
+        progressBarLabel->setVisible(false);
 
         progressBar->setVisible(false);
         tooltip = tr("Downloaded %1 blocks of transaction history.").arg(count);
     }
 
-    // Override progressBarLabel text and hide progress bar, when we have warnings to display
-    if (!strStatusBarWarnings.isEmpty())
-    {
-        progressBarLabel->setText(strStatusBarWarnings);
-        progressBarLabel->setVisible(true);
-        progressBar->setVisible(false);
-    }
-
     QDateTime lastBlockDate = clientModel->getLastBlockDate();
     int secs = lastBlockDate.secsTo(QDateTime::currentDateTime());
     QString text;
diff --git a/src/qt/clientmodel.cpp b/src/qt/clientmodel.cpp
index 990b364a94..25db695a0b 100644
--- a/src/qt/clientmodel.cpp
+++ b/src/qt/clientmodel.cpp
@@ -88,9 +88,7 @@ void ClientModel::updateAlert(const QString &hash, int status)
         }
     }
 
-    // Emit a numBlocksChanged when the status message changes,
-    // so that the view recomputes and updates the status bar.
-    emit numBlocksChanged(getNumBlocks(), getNumBlocksOfPeers());
+    emit alertsChanged(getStatusBarWarnings());
 }
 
 bool ClientModel::isTestNet() const
@@ -133,6 +131,11 @@ QString ClientModel::formatBuildDate() const
     return QString::fromStdString(CLIENT_DATE);
 }
 
+bool ClientModel::isReleaseVersion() const
+{
+    return CLIENT_VERSION_IS_RELEASE;
+}
+
 QString ClientModel::clientName() const
 {
     return QString::fromStdString(CLIENT_NAME);
diff --git a/src/qt/clientmodel.h b/src/qt/clientmodel.h
index 926390a07a..fd0135b3e6 100644
--- a/src/qt/clientmodel.h
+++ b/src/qt/clientmodel.h
@@ -42,6 +42,7 @@ public:
 
     QString formatFullVersion() const;
     QString formatBuildDate() const;
+    bool isReleaseVersion() const;
     QString clientName() const;
     QString formatClientStartupTime() const;
 
@@ -60,6 +61,7 @@ private:
 signals:
     void numConnectionsChanged(int count);
     void numBlocksChanged(int count, int countOfPeers);
+    void alertsChanged(const QString &warnings);
 
     //! Asynchronous error notification
     void error(const QString &title, const QString &message, bool modal);
diff --git a/src/qt/forms/overviewpage.ui b/src/qt/forms/overviewpage.ui
index 98cb63e9ff..4c4dec6c9c 100644
--- a/src/qt/forms/overviewpage.ui
+++ b/src/qt/forms/overviewpage.ui
@@ -13,282 +13,303 @@
   <property name="windowTitle">
    <string>Form</string>
   </property>
-  <layout class="QHBoxLayout" name="horizontalLayout" stretch="1,1">
+  <layout class="QVBoxLayout" name="topLayout">
    <item>
-    <layout class="QVBoxLayout" name="verticalLayout_2">
+    <widget class="QLabel" name="labelAlerts">
+     <property name="visible">
+      <bool>false</bool>
+     </property>
+     <property name="styleSheet">
+      <string notr="true">background-color: qlineargradient(x1: 0, y1: 0, x2: 1, y2: 0, stop:0 #F0D0A0, stop:1 #F8D488);  color:#000000
+</string>
+     </property>
+     <property name="wordWrap">
+      <bool>true</bool>
+     </property>
+     <property name="margin">
+      <number>3</number>
+     </property>
+    </widget>
+   </item>
+   <item>
+    <layout class="QHBoxLayout" name="horizontalLayout" stretch="1,1">
      <item>
-      <widget class="QFrame" name="frame">
-       <property name="frameShape">
-        <enum>QFrame::StyledPanel</enum>
-       </property>
-       <property name="frameShadow">
-        <enum>QFrame::Raised</enum>
-       </property>
-       <layout class="QVBoxLayout" name="verticalLayout_4">
-        <item>
-         <layout class="QHBoxLayout" name="horizontalLayout_4">
+      <layout class="QVBoxLayout" name="verticalLayout_2">
+       <item>
+        <widget class="QFrame" name="frame">
+         <property name="frameShape">
+          <enum>QFrame::StyledPanel</enum>
+         </property>
+         <property name="frameShadow">
+          <enum>QFrame::Raised</enum>
+         </property>
+         <layout class="QVBoxLayout" name="verticalLayout_4">
           <item>
-           <widget class="QLabel" name="label_5">
-            <property name="font">
-             <font>
-              <pointsize>11</pointsize>
-              <weight>75</weight>
-              <bold>true</bold>
-             </font>
-            </property>
-            <property name="text">
-             <string>Wallet</string>
-            </property>
-           </widget>
+           <layout class="QHBoxLayout" name="horizontalLayout_4">
+            <item>
+             <widget class="QLabel" name="label_5">
+              <property name="font">
+               <font>
+                <pointsize>11</pointsize>
+                <weight>75</weight>
+                <bold>true</bold>
+               </font>
+              </property>
+              <property name="text">
+               <string>Wallet</string>
+              </property>
+             </widget>
+            </item>
+            <item>
+             <widget class="QLabel" name="labelWalletStatus">
+              <property name="toolTip">
+               <string>The displayed information may be out of date. Your wallet automatically synchronizes with the Bitcoin network after a connection is established, but this process has not completed yet.</string>
+              </property>
+              <property name="styleSheet">
+               <string notr="true">QLabel { color: red; }</string>
+              </property>
+              <property name="text">
+               <string notr="true">(out of sync)</string>
+              </property>
+              <property name="alignment">
+               <set>Qt::AlignLeading|Qt::AlignLeft|Qt::AlignVCenter</set>
+              </property>
+             </widget>
+            </item>
+            <item>
+             <spacer name="horizontalSpacer_2">
+              <property name="orientation">
+               <enum>Qt::Horizontal</enum>
+              </property>
+              <property name="sizeHint" stdset="0">
+               <size>
+                <width>40</width>
+                <height>20</height>
+               </size>
+              </property>
+             </spacer>
+            </item>
+           </layout>
           </item>
           <item>
-           <widget class="QLabel" name="labelWalletStatus">
-            <property name="toolTip">
-             <string>The displayed information may be out of date. Your wallet automatically synchronizes with the Bitcoin network after a connection is established, but this process has not completed yet.</string>
-            </property>
-            <property name="styleSheet">
-             <string notr="true">QLabel { color: red; }</string>
-            </property>
-            <property name="text">
-             <string notr="true">(out of sync)</string>
-            </property>
-            <property name="alignment">
-             <set>Qt::AlignLeading|Qt::AlignLeft|Qt::AlignVCenter</set>
-            </property>
-           </widget>
-          </item>
-          <item>
-           <spacer name="horizontalSpacer_2">
-            <property name="orientation">
-             <enum>Qt::Horizontal</enum>
-            </property>
-            <property name="sizeHint" stdset="0">
-             <size>
-              <width>40</width>
-              <height>20</height>
-             </size>
-            </property>
-           </spacer>
-          </item>
-         </layout>
-        </item>
-        <item>
-         <layout class="QFormLayout" name="formLayout_2">
-          <property name="fieldGrowthPolicy">
-           <enum>QFormLayout::AllNonFixedFieldsGrow</enum>
-          </property>
-          <property name="horizontalSpacing">
-           <number>12</number>
-          </property>
-          <property name="verticalSpacing">
-           <number>12</number>
-          </property>
-          <item row="0" column="0">
-           <widget class="QLabel" name="label">
-            <property name="text">
-             <string>Balance:</string>
-            </property>
-           </widget>
-          </item>
-          <item row="0" column="1">
-           <widget class="QLabel" name="labelBalance">
-            <property name="font">
-             <font>
-              <weight>75</weight>
-              <bold>true</bold>
-             </font>
-            </property>
-            <property name="cursor">
-             <cursorShape>IBeamCursor</cursorShape>
-            </property>
-            <property name="toolTip">
-             <string>Your current balance</string>
-            </property>
-            <property name="text">
-             <string notr="true">0 BTC</string>
-            </property>
-            <property name="textInteractionFlags">
-             <set>Qt::LinksAccessibleByMouse|Qt::TextSelectableByKeyboard|Qt::TextSelectableByMouse</set>
-            </property>
-           </widget>
-          </item>
-          <item row="1" column="0">
-           <widget class="QLabel" name="label_3">
-            <property name="text">
-             <string>Unconfirmed:</string>
-            </property>
-           </widget>
-          </item>
-          <item row="1" column="1">
-           <widget class="QLabel" name="labelUnconfirmed">
-            <property name="font">
-             <font>
-              <weight>75</weight>
-              <bold>true</bold>
-             </font>
-            </property>
-            <property name="cursor">
-             <cursorShape>IBeamCursor</cursorShape>
-            </property>
-            <property name="toolTip">
-             <string>Total of transactions that have yet to be confirmed, and do not yet count toward the current balance</string>
-            </property>
-            <property name="text">
-             <string notr="true">0 BTC</string>
-            </property>
-            <property name="textInteractionFlags">
-             <set>Qt::LinksAccessibleByMouse|Qt::TextSelectableByKeyboard|Qt::TextSelectableByMouse</set>
-            </property>
-           </widget>
-          </item>
-          <item row="3" column="0">
-           <widget class="QLabel" name="label_2">
-            <property name="text">
-             <string>Number of transactions:</string>
-            </property>
-           </widget>
-          </item>
-          <item row="3" column="1">
-           <widget class="QLabel" name="labelNumTransactions">
-            <property name="toolTip">
-             <string>Total number of transactions in wallet</string>
-            </property>
-            <property name="text">
-             <string notr="true">0</string>
-            </property>
-           </widget>
-          </item>
-          <item row="2" column="0">
-           <widget class="QLabel" name="labelImmatureText">
-            <property name="text">
-             <string>Immature:</string>
-            </property>
-           </widget>
-          </item>
-          <item row="2" column="1">
-           <widget class="QLabel" name="labelImmature">
-            <property name="font">
-             <font>
-              <weight>75</weight>
-              <bold>true</bold>
-             </font>
-            </property>
-            <property name="toolTip">
-             <string>Mined balance that has not yet matured</string>
-            </property>
-            <property name="text">
-             <string notr="true">0 BTC</string>
-            </property>
-            <property name="textInteractionFlags">
-             <set>Qt::LinksAccessibleByMouse|Qt::TextSelectableByKeyboard|Qt::TextSelectableByMouse</set>
-            </property>
-           </widget>
+           <layout class="QFormLayout" name="formLayout_2">
+            <property name="fieldGrowthPolicy">
+             <enum>QFormLayout::AllNonFixedFieldsGrow</enum>
+            </property>
+            <property name="horizontalSpacing">
+             <number>12</number>
+            </property>
+            <property name="verticalSpacing">
+             <number>12</number>
+            </property>
+            <item row="0" column="0">
+             <widget class="QLabel" name="label">
+              <property name="text">
+               <string>Balance:</string>
+              </property>
+             </widget>
+            </item>
+            <item row="0" column="1">
+             <widget class="QLabel" name="labelBalance">
+              <property name="font">
+               <font>
+                <weight>75</weight>
+                <bold>true</bold>
+               </font>
+              </property>
+              <property name="cursor">
+               <cursorShape>IBeamCursor</cursorShape>
+              </property>
+              <property name="toolTip">
+               <string>Your current balance</string>
+              </property>
+              <property name="text">
+               <string notr="true">0 BTC</string>
+              </property>
+              <property name="textInteractionFlags">
+               <set>Qt::LinksAccessibleByMouse|Qt::TextSelectableByKeyboard|Qt::TextSelectableByMouse</set>
+              </property>
+             </widget>
+            </item>
+            <item row="1" column="0">
+             <widget class="QLabel" name="label_3">
+              <property name="text">
+               <string>Unconfirmed:</string>
+              </property>
+             </widget>
+            </item>
+            <item row="1" column="1">
+             <widget class="QLabel" name="labelUnconfirmed">
+              <property name="font">
+               <font>
+                <weight>75</weight>
+                <bold>true</bold>
+               </font>
+              </property>
+              <property name="cursor">
+               <cursorShape>IBeamCursor</cursorShape>
+              </property>
+              <property name="toolTip">
+               <string>Total of transactions that have yet to be confirmed, and do not yet count toward the current balance</string>
+              </property>
+              <property name="text">
+               <string notr="true">0 BTC</string>
+              </property>
+              <property name="textInteractionFlags">
+               <set>Qt::LinksAccessibleByMouse|Qt::TextSelectableByKeyboard|Qt::TextSelectableByMouse</set>
+              </property>
+             </widget>
+            </item>
+            <item row="3" column="0">
+             <widget class="QLabel" name="label_2">
+              <property name="text">
+               <string>Number of transactions:</string>
+              </property>
+             </widget>
+            </item>
+            <item row="3" column="1">
+             <widget class="QLabel" name="labelNumTransactions">
+              <property name="toolTip">
+               <string>Total number of transactions in wallet</string>
+              </property>
+              <property name="text">
+               <string notr="true">0</string>
+              </property>
+             </widget>
+            </item>
+            <item row="2" column="0">
+             <widget class="QLabel" name="labelImmatureText">
+              <property name="text">
+               <string>Immature:</string>
+              </property>
+             </widget>
+            </item>
+            <item row="2" column="1">
+             <widget class="QLabel" name="labelImmature">
+              <property name="font">
+               <font>
+                <weight>75</weight>
+                <bold>true</bold>
+               </font>
+              </property>
+              <property name="toolTip">
+               <string>Mined balance that has not yet matured</string>
+              </property>
+              <property name="text">
+               <string notr="true">0 BTC</string>
+              </property>
+              <property name="textInteractionFlags">
+               <set>Qt::LinksAccessibleByMouse|Qt::TextSelectableByKeyboard|Qt::TextSelectableByMouse</set>
+              </property>
+             </widget>
+            </item>
+           </layout>
           </item>
          </layout>
-        </item>
-       </layout>
-      </widget>
-     </item>
-     <item>
-      <spacer name="verticalSpacer">
-       <property name="orientation">
-        <enum>Qt::Vertical</enum>
-       </property>
-       <property name="sizeHint" stdset="0">
-        <size>
-         <width>20</width>
-         <height>40</height>
-        </size>
-       </property>
-      </spacer>
+        </widget>
+       </item>
+       <item>
+        <spacer name="verticalSpacer">
+         <property name="orientation">
+          <enum>Qt::Vertical</enum>
+         </property>
+         <property name="sizeHint" stdset="0">
+          <size>
+           <width>20</width>
+           <height>40</height>
+          </size>
+         </property>
+        </spacer>
+       </item>
+      </layout>
      </item>
-    </layout>
-   </item>
-   <item>
-    <layout class="QVBoxLayout" name="verticalLayout_3">
      <item>
-      <widget class="QFrame" name="frame_2">
-       <property name="frameShape">
-        <enum>QFrame::StyledPanel</enum>
-       </property>
-       <property name="frameShadow">
-        <enum>QFrame::Raised</enum>
-       </property>
-       <layout class="QVBoxLayout" name="verticalLayout">
-        <item>
-         <layout class="QHBoxLayout" name="horizontalLayout_2">
+      <layout class="QVBoxLayout" name="verticalLayout_3">
+       <item>
+        <widget class="QFrame" name="frame_2">
+         <property name="frameShape">
+          <enum>QFrame::StyledPanel</enum>
+         </property>
+         <property name="frameShadow">
+          <enum>QFrame::Raised</enum>
+         </property>
+         <layout class="QVBoxLayout" name="verticalLayout">
           <item>
-           <widget class="QLabel" name="label_4">
-            <property name="text">
-             <string>&lt;b&gt;Recent transactions&lt;/b&gt;</string>
-            </property>
-           </widget>
+           <layout class="QHBoxLayout" name="horizontalLayout_2">
+            <item>
+             <widget class="QLabel" name="label_4">
+              <property name="text">
+               <string>&lt;b&gt;Recent transactions&lt;/b&gt;</string>
+              </property>
+             </widget>
+            </item>
+            <item>
+             <widget class="QLabel" name="labelTransactionsStatus">
+              <property name="toolTip">
+               <string>The displayed information may be out of date. Your wallet automatically synchronizes with the Bitcoin network after a connection is established, but this process has not completed yet.</string>
+              </property>
+              <property name="styleSheet">
+               <string notr="true">QLabel { color: red; }</string>
+              </property>
+              <property name="text">
+               <string notr="true">(out of sync)</string>
+              </property>
+              <property name="alignment">
+               <set>Qt::AlignRight|Qt::AlignTrailing|Qt::AlignVCenter</set>
+              </property>
+             </widget>
+            </item>
+            <item>
+             <spacer name="horizontalSpacer">
+              <property name="orientation">
+               <enum>Qt::Horizontal</enum>
+              </property>
+              <property name="sizeHint" stdset="0">
+               <size>
+                <width>40</width>
+                <height>20</height>
+               </size>
+              </property>
+             </spacer>
+            </item>
+           </layout>
           </item>
           <item>
-           <widget class="QLabel" name="labelTransactionsStatus">
-            <property name="toolTip">
-             <string>The displayed information may be out of date. Your wallet automatically synchronizes with the Bitcoin network after a connection is established, but this process has not completed yet.</string>
-            </property>
+           <widget class="QListView" name="listTransactions">
             <property name="styleSheet">
-             <string notr="true">QLabel { color: red; }</string>
+             <string notr="true">QListView { background: transparent; }</string>
             </property>
-            <property name="text">
-             <string notr="true">(out of sync)</string>
+            <property name="frameShape">
+             <enum>QFrame::NoFrame</enum>
             </property>
-            <property name="alignment">
-             <set>Qt::AlignRight|Qt::AlignTrailing|Qt::AlignVCenter</set>
+            <property name="verticalScrollBarPolicy">
+             <enum>Qt::ScrollBarAlwaysOff</enum>
             </property>
-           </widget>
-          </item>
-          <item>
-           <spacer name="horizontalSpacer">
-            <property name="orientation">
-             <enum>Qt::Horizontal</enum>
+            <property name="horizontalScrollBarPolicy">
+             <enum>Qt::ScrollBarAlwaysOff</enum>
             </property>
-            <property name="sizeHint" stdset="0">
-             <size>
-              <width>40</width>
-              <height>20</height>
-             </size>
+            <property name="selectionMode">
+             <enum>QAbstractItemView::NoSelection</enum>
             </property>
-           </spacer>
+           </widget>
           </item>
          </layout>
-        </item>
-        <item>
-         <widget class="QListView" name="listTransactions">
-          <property name="styleSheet">
-           <string notr="true">QListView { background: transparent; }</string>
-          </property>
-          <property name="frameShape">
-           <enum>QFrame::NoFrame</enum>
-          </property>
-          <property name="verticalScrollBarPolicy">
-           <enum>Qt::ScrollBarAlwaysOff</enum>
-          </property>
-          <property name="horizontalScrollBarPolicy">
-           <enum>Qt::ScrollBarAlwaysOff</enum>
-          </property>
-          <property name="selectionMode">
-           <enum>QAbstractItemView::NoSelection</enum>
-          </property>
-         </widget>
-        </item>
-       </layout>
-      </widget>
-     </item>
-     <item>
-      <spacer name="verticalSpacer_2">
-       <property name="orientation">
-        <enum>Qt::Vertical</enum>
-       </property>
-       <property name="sizeHint" stdset="0">
-        <size>
-         <width>20</width>
-         <height>40</height>
-        </size>
-       </property>
-      </spacer>
+        </widget>
+       </item>
+       <item>
+        <spacer name="verticalSpacer_2">
+         <property name="orientation">
+          <enum>Qt::Vertical</enum>
+         </property>
+         <property name="sizeHint" stdset="0">
+          <size>
+           <width>20</width>
+           <height>40</height>
+          </size>
+         </property>
+        </spacer>
+       </item>
+      </layout>
      </item>
     </layout>
    </item>
diff --git a/src/qt/overviewpage.cpp b/src/qt/overviewpage.cpp
index 07be9c520a..8f1ff5325e 100644
--- a/src/qt/overviewpage.cpp
+++ b/src/qt/overviewpage.cpp
@@ -1,6 +1,7 @@
 #include "overviewpage.h"
 #include "ui_overviewpage.h"
 
+#include "clientmodel.h"
 #include "walletmodel.h"
 #include "bitcoinunits.h"
 #include "optionsmodel.h"
@@ -92,6 +93,8 @@ public:
 OverviewPage::OverviewPage(QWidget *parent) :
     QWidget(parent),
     ui(new Ui::OverviewPage),
+    clientModel(0),
+    walletModel(0),
     currentBalance(-1),
     currentUnconfirmedBalance(-1),
     currentImmatureBalance(-1),
@@ -129,7 +132,7 @@ OverviewPage::~OverviewPage()
 
 void OverviewPage::setBalance(qint64 balance, qint64 unconfirmedBalance, qint64 immatureBalance)
 {
-    int unit = model->getOptionsModel()->getDisplayUnit();
+    int unit = walletModel->getOptionsModel()->getDisplayUnit();
     currentBalance = balance;
     currentUnconfirmedBalance = unconfirmedBalance;
     currentImmatureBalance = immatureBalance;
@@ -149,9 +152,20 @@ void OverviewPage::setNumTransactions(int count)
     ui->labelNumTransactions->setText(QLocale::system().toString(count));
 }
 
-void OverviewPage::setModel(WalletModel *model)
+void OverviewPage::setClientModel(ClientModel *model)
 {
-    this->model = model;
+    this->clientModel = model;
+    if(model)
+    {
+        // Show warning if this is a prerelease version
+        connect(model, SIGNAL(alertsChanged(QString)), this, SLOT(updateAlerts(QString)));
+        updateAlerts(model->getStatusBarWarnings());
+    }
+}
+
+void OverviewPage::setWalletModel(WalletModel *model)
+{
+    this->walletModel = model;
     if(model && model->getOptionsModel())
     {
         // Set up transaction list
@@ -181,18 +195,24 @@ void OverviewPage::setModel(WalletModel *model)
 
 void OverviewPage::updateDisplayUnit()
 {
-    if(model && model->getOptionsModel())
+    if(walletModel && walletModel->getOptionsModel())
     {
         if(currentBalance != -1)
             setBalance(currentBalance, currentUnconfirmedBalance, currentImmatureBalance);
 
         // Update txdelegate->unit with the current unit
-        txdelegate->unit = model->getOptionsModel()->getDisplayUnit();
+        txdelegate->unit = walletModel->getOptionsModel()->getDisplayUnit();
 
         ui->listTransactions->update();
     }
 }
 
+void OverviewPage::updateAlerts(const QString &warnings)
+{
+    this->ui->labelAlerts->setVisible(!warnings.isEmpty());
+    this->ui->labelAlerts->setText(warnings);
+}
+
 void OverviewPage::showOutOfSyncWarning(bool fShow)
 {
     ui->labelWalletStatus->setVisible(fShow);
diff --git a/src/qt/overviewpage.h b/src/qt/overviewpage.h
index 00048cc8f8..bb32a0c33f 100644
--- a/src/qt/overviewpage.h
+++ b/src/qt/overviewpage.h
@@ -10,6 +10,7 @@ QT_END_NAMESPACE
 namespace Ui {
     class OverviewPage;
 }
+class ClientModel;
 class WalletModel;
 class TxViewDelegate;
 class TransactionFilterProxy;
@@ -23,7 +24,8 @@ public:
     explicit OverviewPage(QWidget *parent = 0);
     ~OverviewPage();
 
-    void setModel(WalletModel *model);
+    void setClientModel(ClientModel *clientModel);
+    void setWalletModel(WalletModel *walletModel);
     void showOutOfSyncWarning(bool fShow);
 
 public slots:
@@ -35,7 +37,8 @@ signals:
 
 private:
     Ui::OverviewPage *ui;
-    WalletModel *model;
+    ClientModel *clientModel;
+    WalletModel *walletModel;
     qint64 currentBalance;
     qint64 currentUnconfirmedBalance;
     qint64 currentImmatureBalance;
@@ -46,6 +49,7 @@ private:
 private slots:
     void updateDisplayUnit();
     void handleTransactionClicked(const QModelIndex &index);
+    void updateAlerts(const QString &warnings);
 };
 
 #endif // OVERVIEWPAGE_H