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, 14 insertions, 0 deletions

diff --git a/src/qt/optionsdialog.cpp b/src/qt/optionsdialog.cpp
index 95a3fa8d21..f2db398899 100644
--- a/src/qt/optionsdialog.cpp
+++ b/src/qt/optionsdialog.cpp
@@ -198,6 +198,7 @@ void OptionsDialog::setMapper()
 
     /* Window */
 #ifndef Q_OS_MAC
+    mapper->addMapping(ui->hideTrayIcon, OptionsModel::HideTrayIcon);
     mapper->addMapping(ui->minimizeToTray, OptionsModel::MinimizeToTray);
     mapper->addMapping(ui->minimizeOnClose, OptionsModel::MinimizeOnClose);
 #endif
@@ -243,6 +244,19 @@ void OptionsDialog::on_cancelButton_clicked()
     reject();
 }
 
+void OptionsDialog::on_hideTrayIcon_stateChanged(int fState)
+{
+    if(fState)
+    {
+        ui->minimizeToTray->setChecked(false);
+        ui->minimizeToTray->setEnabled(false);
+    }
+    else
+    {
+        ui->minimizeToTray->setEnabled(true);
+    }
+}
+
 void OptionsDialog::showRestartWarning(bool fPersistent)
 {
     ui->statusLabel->setStyleSheet("QLabel { color: red; }");