Phosphor and scanlines levels: 0 displayed as 'off'

src/emucore/EventHandler.cxx

@@ -362,7 +362,7 @@ void EventHandler::handleEvent(Event::Type event, bool pressed)
     ////////////////////////////////////////////////////////////////////////
 
     case Event::Fry:
-      if(myPKeyHandler->useCtrlKey()) myFryingFlag = bool(pressed);
+      if(myPKeyHandler->useCtrlKey()) myFryingFlag = pressed;
       return;
 
     case Event::VolumeDecrease:

src/gui/StellaSettingsDialog.cxx

@@ -120,7 +120,7 @@ void StellaSettingsDialog::addVideoOptions(WidgetArray& wid, int& xpos, int& ypo
   myTVScanlines = new StaticTextWidget(this, font, xpos, ypos + 1, "Scanlines:");
   ypos += lineHeight;
   myTVScanIntense = new SliderWidget(this, font, xpos + INDENT, ypos-1, swidth, lineHeight,
-    "Intensity ", lwidth, 0, fontWidth * 2);
+    "Intensity ", lwidth, kScanlinesChanged, fontWidth * 3);
   myTVScanIntense->setMinValue(0); myTVScanIntense->setMaxValue(10);
   myTVScanIntense->setTickmarkInterval(2);
   wid.push_back(myTVScanIntense);
@@ -131,7 +131,7 @@ void StellaSettingsDialog::addVideoOptions(WidgetArray& wid, int& xpos, int& ypo
   ypos += lineHeight;
   // TV Phosphor blend level
   myTVPhosLevel = new SliderWidget(this, font, xpos + INDENT, ypos-1, swidth, lineHeight,
-    "Blend     ", lwidth, 0, fontWidth * 2);
+    "Blend     ", lwidth, kPhosphorChanged, fontWidth * 3);
   myTVPhosLevel->setMinValue(0); myTVPhosLevel->setMaxValue(10);
   myTVPhosLevel->setTickmarkInterval(2);
   wid.push_back(myTVPhosLevel);
@@ -300,6 +300,16 @@ void StellaSettingsDialog::handleCommand(CommandSender* sender, int cmd,
       handleTVModeChange();
       break;
 
+    case kScanlinesChanged:
+      if(myTVScanIntense->getValue() == 0)
+        myTVScanIntense->setValueLabel("off");
+      break;
+
+    case kPhosphorChanged:
+      if(myTVPhosLevel->getValue() == 0)
+        myTVPhosLevel->setValueLabel("off");
+      break;
+
     default:
       Dialog::handleCommand(sender, cmd, data, 0);
       break;

src/gui/StellaSettingsDialog.hxx

@@ -78,6 +78,8 @@ class StellaSettingsDialog : public Dialog
 
     enum {
       kTVModeChanged    = 'SStv',
+      kScanlinesChanged = 'SSsc',
+      kPhosphorChanged  = 'SSph'
     };
 
     // Game properties for currently loaded ROM