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.

1 files changed, 25 insertions, 5 deletions

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);