Qt: Add option to hide the system tray icon

My changes leave all tray icon and menu creation/initialization logic
untouched. It only shows or hides the icon according to the setting.

A new checkbox was added to the OptionsDialog under the Window tab. A
bool option named "hideTrayIcon" was added to OptionsModel. This
checkbox was mapped like other all options to the OptionsModel.

A signal was added to the OptionsModel for broadcasting changes the the
hideTrayIcon option. This signal was connected to a new slot added to
BitcoinGUI named setTrayIconVisible(bool). The slot simply hides or
shows the trayIcon in BitcoinGUI according to the parameter recieved.

1 files changed, 13 insertions, 1 deletions

diff --git a/src/qt/optionsmodel.cpp b/src/qt/optionsmodel.cpp
index d091bb9e61..cc2cbc0e66 100644
--- a/src/qt/optionsmodel.cpp
+++ b/src/qt/optionsmodel.cpp
@@ -51,9 +51,14 @@ void OptionsModel::Init(bool resetSettings)
     // These are Qt-only settings:
 
     // Window
+    if (!settings.contains("fHideTrayIcon"))
+        settings.setValue("fHideTrayIcon", false);
+    fHideTrayIcon = settings.value("fHideTrayIcon").toBool();
+    Q_EMIT hideTrayIconChanged(fHideTrayIcon);
+    
     if (!settings.contains("fMinimizeToTray"))
         settings.setValue("fMinimizeToTray", false);
-    fMinimizeToTray = settings.value("fMinimizeToTray").toBool();
+    fMinimizeToTray = settings.value("fMinimizeToTray").toBool() && !fHideTrayIcon;
 
     if (!settings.contains("fMinimizeOnClose"))
         settings.setValue("fMinimizeOnClose", false);
@@ -166,6 +171,8 @@ QVariant OptionsModel::data(const QModelIndex & index, int role) const
         {
         case StartAtStartup:
             return GUIUtil::GetStartOnSystemStartup();
+        case HideTrayIcon:
+            return fHideTrayIcon;
         case MinimizeToTray:
             return fMinimizeToTray;
         case MapPortUPnP:
@@ -242,6 +249,11 @@ bool OptionsModel::setData(const QModelIndex & index, const QVariant & value, in
         case StartAtStartup:
             successful = GUIUtil::SetStartOnSystemStartup(value.toBool());
             break;
+        case HideTrayIcon:
+            fHideTrayIcon = value.toBool();
+            settings.setValue("fHideTrayIcon", fHideTrayIcon);
+    		Q_EMIT hideTrayIconChanged(fHideTrayIcon);
+            break;
         case MinimizeToTray:
             fMinimizeToTray = value.toBool();
             settings.setValue("fMinimizeToTray", fMinimizeToTray);