Change YStart and Display widgets in GameInfoDialog to be sliders

instead of textboxes.  This allows to eliminate error checking,
since the widget will only allow sane values.

Added YStart/Display min/max variables to FrameManager, and
refactor for other parts of the codebase to use these variables.

src/emucore/Console.cxx

@@ -486,7 +486,7 @@ void Console::changeYStart(int direction)
 
   if(direction == +1)       // increase YStart
   {
-    if(ystart >= 64)
+    if(ystart >= FrameManager::maxYStart)
     {
       myOSystem.frameBuffer().showMessage("YStart at maximum");
       return;
@@ -495,7 +495,7 @@ void Console::changeYStart(int direction)
   }
   else if(direction == -1)  // decrease YStart
   {
-    if(ystart == 0)
+    if(ystart == FrameManager::minYStart-1)
     {
       myOSystem.frameBuffer().showMessage("YStart at minimum");
       return;
@@ -510,7 +510,10 @@ void Console::changeYStart(int direction)
 
   ostringstream val;
   val << ystart;
-  myOSystem.frameBuffer().showMessage("YStart " + val.str());
+  if(ystart == FrameManager::minYStart-1)
+    myOSystem.frameBuffer().showMessage("YStart autodetected");
+  else
+    myOSystem.frameBuffer().showMessage("YStart " + val.str());
   myProperties.set(Display_YStart, val.str());
 }
 
@@ -523,8 +526,7 @@ void Console::changeHeight(int direction)
   if(direction == +1)       // increase Height
   {
     height++;
-    if (height < 210) height = 210;
-    if(height > 256 || height > dheight)
+    if(height > FrameManager::maxViewableHeight || height > dheight)
     {
       myOSystem.frameBuffer().showMessage("Height at maximum");
       return;
@@ -533,7 +535,7 @@ void Console::changeHeight(int direction)
   else if(direction == -1)  // decrease Height
   {
     height--;
-    if(height < 210) height = 0;
+    if(height < FrameManager::minViewableHeight) height = 0;
   }
   else
     return;
@@ -551,12 +553,12 @@ void Console::changeHeight(int direction)
 // - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
 void Console::setTIAProperties()
 {
-  // TODO - query these values directly from the TIA if value is 'AUTO'
   uInt32 ystart = atoi(myProperties.get(Display_YStart).c_str());
-  if(ystart > 64) ystart = 64;
+  if(ystart != 0)
+    ystart = BSPF::clamp(ystart, FrameManager::minYStart, FrameManager::maxYStart);
   uInt32 height = atoi(myProperties.get(Display_Height).c_str());
-  if(height < 210 && height != 0)      height = 210;
-  else if(height > 256) height = 256;
+  if(height != 0)
+    height = BSPF::clamp(height, FrameManager::minViewableHeight, FrameManager::maxViewableHeight);
 
   myTIA->autodetectTvMode(false);
 
@@ -575,7 +577,7 @@ void Console::setTIAProperties()
     myConsoleInfo.InitialFrameRate = "50";
 
     // PAL ROMs normally need at least 250 lines
-    if (height !=  0) height = std::max(height, 250u);
+    if (height != 0) height = std::max(height, 250u);
 
     myTIA->setTvMode(TvMode::pal);
   }

src/emucore/FrameBuffer.cxx

@@ -654,7 +654,7 @@ void FrameBuffer::setAvailableVidModes(uInt32 baseWidth, uInt32 baseHeight)
 
     // Figure our the smallest zoom level we can use
     uInt32 firstZoom = 2;
-    if(myDesktopSize.w < 640 || myDesktopSize.h < 480)
+    if(myDesktopSize.w < kFBMinW || myDesktopSize.h < kFBMinH)
       firstZoom = 1;
     for(uInt32 zoom = firstZoom; zoom <= maxZoom; ++zoom)
     {

src/emucore/FrameBuffer.hxx

@@ -33,6 +33,7 @@ namespace GUI {
 #include "Variant.hxx"
 #include "FBSurface.hxx"
 #include "TIASurface.hxx"
+#include "FrameManager.hxx"
 #include "bspf.hxx"
 
 // Return values for initialization of framebuffer window
@@ -129,7 +130,7 @@ class FrameBuffer
 {
   public:
     enum {
-      kTIAMinW = 320u, kTIAMinH = 210u,
+      kTIAMinW = 320u, kTIAMinH = FrameManager::minViewableHeight,
       kFBMinW  = 640u, kFBMinH  = 480u
     };
 

src/emucore/OSystem.cxx

@@ -441,7 +441,7 @@ bool OSystem::createLauncher(const string& startdir)
 // - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
 string OSystem::getROMInfo(const FilesystemNode& romfile)
 {
-  string md5, type, id, result = "";
+  string md5, type, id;
   unique_ptr<Console> console;
   try
   {
@@ -454,8 +454,7 @@ string OSystem::getROMInfo(const FilesystemNode& romfile)
     return buf.str();
   }
 
-  result = getROMInfo(*console);
-  return result;
+  return getROMInfo(*console);
 }
 
 // - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

src/emucore/Props.cxx

@@ -194,7 +194,7 @@ void Properties::writeQuotedString(ostream& out, const string& s)
 }
 
 // - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
-bool Properties::operator == (const Properties& properties) const
+bool Properties::operator==(const Properties& properties) const
 {
   for(int i = 0; i < LastPropType; ++i)
     if(myProperties[i] != properties.myProperties[i])
@@ -204,13 +204,13 @@ bool Properties::operator == (const Properties& properties) const
 }
 
 // - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
-bool Properties::operator != (const Properties& properties) const
+bool Properties::operator!=(const Properties& properties) const
 {
   return !(*this == properties);
 }
 
 // - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
-Properties& Properties::operator = (const Properties& properties)
+Properties& Properties::operator=(const Properties& properties)
 {
   // Do the assignment only if this isn't a self assignment
   if(this != &properties)

src/emucore/tia/FrameManager.hxx

@@ -84,8 +84,9 @@ class FrameManager : public Serializable
     string name() const override { return "TIA_FrameManager"; }
 
   public:
-
     static constexpr uInt32 frameBufferHeight = 320;
+    static constexpr uInt32 minYStart = 1, maxYStart = 64;
+    static constexpr uInt32 minViewableHeight = 210, maxViewableHeight = 256;
 
   private:
 

src/gui/GameInfoDialog.cxx

@@ -26,6 +26,7 @@
 #include "Props.hxx"
 #include "PropsSet.hxx"
 #include "TabWidget.hxx"
+#include "FrameManager.hxx"
 #include "Widget.hxx"
 
 #include "GameInfoDialog.hxx"
@@ -317,16 +318,27 @@ GameInfoDialog::GameInfoDialog(
   ypos += lineHeight + 5;
   new StaticTextWidget(myTab, font, xpos, ypos+1, lwidth, fontHeight,
                        "YStart:", kTextAlignLeft);
-  myYStart = new EditTextWidget(myTab, font, xpos+lwidth, ypos,
-                                4*fontWidth, fontHeight, "");
+
+  myYStart = new SliderWidget(myTab, font, xpos+lwidth, ypos, 8*fontWidth, lineHeight,
+                              "", 0, kYStartChanged);
+  myYStart->setMinValue(FrameManager::minYStart-1);
+  myYStart->setMaxValue(FrameManager::maxYStart);
   wid.push_back(myYStart);
+  myYStartLabel = new StaticTextWidget(myTab, font, xpos+lwidth+myYStart->getWidth() + 4,
+                                       ypos+1, 5*fontWidth, fontHeight, "", kTextAlignLeft);
+  myYStartLabel->setFlags(WIDGET_CLEARBG);
 
   ypos += lineHeight + 5;
   new StaticTextWidget(myTab, font, xpos, ypos+1, lwidth, fontHeight,
                        "Height:", kTextAlignLeft);
-  myHeight = new EditTextWidget(myTab, font, xpos+lwidth, ypos,
-                                4*fontWidth, fontHeight, "");
+  myHeight = new SliderWidget(myTab, font, xpos+lwidth, ypos, 8*fontWidth, lineHeight,
+                              "", 0, kHeightChanged);
+  myHeight->setMinValue(FrameManager::minViewableHeight-1);
+  myHeight->setMaxValue(FrameManager::maxViewableHeight);
   wid.push_back(myHeight);
+  myHeightLabel = new StaticTextWidget(myTab, font, xpos+lwidth+myHeight->getWidth() + 4,
+                                       ypos+1, 5*fontWidth, fontHeight, "", kTextAlignLeft);
+  myHeightLabel->setFlags(WIDGET_CLEARBG);
 
   ypos += lineHeight + 5;
   pwidth = font.getStringWidth("Yes");
@@ -462,8 +474,14 @@ void GameInfoDialog::loadView()
 
   // Display properties
   myFormat->setSelected(myGameProperties.get(Display_Format), "AUTO");
-  myYStart->setText(myGameProperties.get(Display_YStart));
-  myHeight->setText(myGameProperties.get(Display_Height));
+
+  const string& ystart = myGameProperties.get(Display_YStart);
+  myYStart->setValue(atoi(ystart.c_str()));
+  myYStartLabel->setLabel(ystart == "0" ? "Auto" : ystart);
+
+  const string& height = myGameProperties.get(Display_Height);
+  myHeight->setValue(atoi(height.c_str()));
+  myHeightLabel->setLabel(height == "0" ? "Auto" : height);
 
   const string& phos = myGameProperties.get(Display_Phosphor);
   myPhosphor->setSelected(phos, "NO");
@@ -516,8 +534,9 @@ void GameInfoDialog::saveConfig()
 
   // Display properties
   myGameProperties.set(Display_Format, myFormat->getSelectedTag().toString());
-  myGameProperties.set(Display_YStart, myYStart->getText());
-  myGameProperties.set(Display_Height, myHeight->getText());
+  myGameProperties.set(Display_YStart, myYStartLabel->getLabel());
+  myGameProperties.set(Display_Height, myHeightLabel->getLabel() == "Auto" ? "0" :
+                       myHeightLabel->getLabel());
   myGameProperties.set(Display_Phosphor, myPhosphor->getSelectedTag().toString());
   myGameProperties.set(Display_PPBlend, myPPBlendLabel->getLabel());
 
@@ -577,6 +596,20 @@ void GameInfoDialog::handleCommand(CommandSender* sender, int cmd,
       break;
     }
 
+    case kYStartChanged:
+      if(myYStart->getValue() == FrameManager::minYStart-1)
+        myYStartLabel->setLabel("Auto");
+      else
+        myYStartLabel->setValue(myYStart->getValue());
+      break;
+
+    case kHeightChanged:
+      if(myHeight->getValue() == FrameManager::minViewableHeight-1)
+        myHeightLabel->setLabel("Auto");
+      else
+        myHeightLabel->setValue(myHeight->getValue());
+      break;
+
     case kPPBlendChanged:
       myPPBlendLabel->setValue(myPPBlend->getValue());
       break;

src/gui/GameInfoDialog.hxx

@@ -77,8 +77,10 @@ class GameInfoDialog : public Dialog, public CommandSender
 
     // Display properties
     PopUpWidget*      myFormat;
-    EditTextWidget*   myYStart;
-    EditTextWidget*   myHeight;
+    SliderWidget*     myYStart;
+    StaticTextWidget* myYStartLabel;
+    SliderWidget*     myHeight;
+    StaticTextWidget* myHeightLabel;
     PopUpWidget*      myPhosphor;
     SliderWidget*     myPPBlend;
     StaticTextWidget* myPPBlendLabel;
@@ -87,6 +89,8 @@ class GameInfoDialog : public Dialog, public CommandSender
       kLeftCChanged    = 'LCch',
       kRightCChanged   = 'RCch',
       kMRangeChanged   = 'MRch',
+      kYStartChanged   = 'YSch',
+      kHeightChanged   = 'HTch',
       kPhosphorChanged = 'PPch',
       kPPBlendChanged  = 'PBch',
       kMCtrlChanged    = 'MCch'

src/gui/RomInfoWidget.cxx

@@ -28,7 +28,8 @@ RomInfoWidget::RomInfoWidget(GuiObject* boss, const GUI::Font& font,
   : Widget(boss, font, x, y, w, h),
     mySurfaceIsValid(false),
     myHaveProperties(false),
-    myAvail(w > 400 ? GUI::Size(640, 512) : GUI::Size(320, 256))
+    myAvail(w > 400 ? GUI::Size(640, FrameManager::maxViewableHeight*2) :
+                      GUI::Size(320, FrameManager::maxViewableHeight))
 {
   _flags = WIDGET_ENABLED;
   _bgcolor = _bgcolorhi = kWidColor;
@@ -75,7 +76,7 @@ void RomInfoWidget::parseProperties()
   // only draw certain parts of it
   if(mySurface == nullptr)
   {
-    mySurface = instance().frameBuffer().allocateSurface(320*2, 256*2);
+    mySurface = instance().frameBuffer().allocateSurface(320*2, FrameManager::maxViewableHeight*2);
     mySurface->attributes().smoothing = true;
     mySurface->applyAttributes();