1 files changed, 37 insertions, 0 deletions
diff --git a/src/qt/bitcoingui.h b/src/qt/bitcoingui.h
index e7a842df99..705e629a69 100644
--- a/src/qt/bitcoingui.h
+++ b/src/qt/bitcoingui.h
@@ -9,12 +9,16 @@
 #include "config/bitcoin-config.h"
 #endif
 
+#include <QLabel>
 #include <QMainWindow>
 #include <QMap>
+#include <QMenu>
+#include <QPoint>
 #include <QSystemTrayIcon>
 
 class ClientModel;
 class Notificator;
+class OptionsModel;
 class RPCConsole;
 class SendCoinsRecipient;
 class WalletFrame;
@@ -22,9 +26,13 @@ class WalletModel;
 
 class CWallet;
 
+class UnitDisplayStatusBarControl;
+
 QT_BEGIN_NAMESPACE
 class QAction;
 class QLabel;
+class QMenu;
+class QPoint;
 class QProgressBar;
 class QProgressDialog;
 QT_END_NAMESPACE
@@ -69,6 +77,7 @@ private:
     ClientModel *clientModel;
     WalletFrame *walletFrame;
 
+    UnitDisplayStatusBarControl *unitDisplayControl;
     QLabel *labelEncryptionIcon;
     QLabel *labelConnectionsIcon;
     QLabel *labelBlocksIcon;
@@ -198,4 +207,32 @@ private slots:
     void showProgress(const QString &title, int nProgress);
 };
 
+class UnitDisplayStatusBarControl : public QLabel
+{
+    Q_OBJECT
+
+public:
+    explicit UnitDisplayStatusBarControl();
+    /** Lets the control know about the Options Model (and its signals) */
+    void setOptionsModel(OptionsModel *optionsModel);
+
+protected:
+    /** So that it responds to left-button clicks */
+    void mousePressEvent(QMouseEvent *event);
+
+private:
+    OptionsModel *optionsModel;
+    QMenu* menu;
+    /** Shows context menu with Display Unit options by the mouse coordinates */
+    void onDisplayUnitsClicked(const QPoint& point);
+    /** Creates context menu, its actions, and wires up all the relevant signals for mouse events. */
+    void createContextMenu();
+
+private slots:
+    /** When Display Units are changed on OptionsModel it will refresh the display text of the control on the status bar */
+    void updateDisplayUnit(int newUnits);
+    /** Tells underlying optionsModel to update its current display unit. */
+    void onMenuSelection(QAction* action);
+};
+
 #endif // BITCOINGUI_H