Added basic infrastructure for what will become the rewind dialog.

src/emucore/OSystem.cxx

@@ -47,6 +47,7 @@
 #include "Menu.hxx"
 #include "CommandMenu.hxx"
 #include "Launcher.hxx"
+#include "Rewinder.hxx"
 #include "PNGLibrary.hxx"
 #include "Widget.hxx"
 #include "Console.hxx"
@@ -140,6 +141,7 @@ bool OSystem::create()
   myMenu = make_unique<Menu>(*this);
   myCommandMenu = make_unique<CommandMenu>(*this);
   myLauncher = make_unique<Launcher>(*this);
+  myRewinder = make_unique<Rewinder>(*this);
   myStateManager = make_unique<StateManager>(*this);
 
   // Create the sound object; the sound subsystem isn't actually

src/emucore/OSystem.hxx

@@ -26,6 +26,7 @@ class Console;
 class Debugger;
 class Launcher;
 class Menu;
+class Rewinder;
 class FrameBuffer;
 class PNGLibrary;
 class Properties;
@@ -152,6 +153,13 @@ class OSystem
     */
     Launcher& launcher() const { return *myLauncher; }
 
+    /**
+      Get the state rewinder of the system.
+
+      @return The rewinder object
+    */
+    Rewinder& rewinder() const { return *myRewinder; }
+
     /**
       Get the state manager of the system.
 
@@ -461,6 +469,9 @@ class OSystem
     unique_ptr<Launcher> myLauncher;
     bool myLauncherUsed;
 
+    // Pointer to the Rewinder object
+    unique_ptr<Rewinder> myRewinder;
+
   #ifdef DEBUGGER_SUPPORT
     // Pointer to the Debugger object
     unique_ptr<Debugger> myDebugger;

src/gui/RewindDialog.cxx

@@ -0,0 +1,39 @@
+//============================================================================
+//
+//   SSSS    tt          lll  lll
+//  SS  SS   tt           ll   ll
+//  SS     tttttt  eeee   ll   ll   aaaa
+//   SSSS    tt   ee  ee  ll   ll      aa
+//      SS   tt   eeeeee  ll   ll   aaaaa  --  "An Atari 2600 VCS Emulator"
+//  SS  SS   tt   ee      ll   ll  aa  aa
+//   SSSS     ttt  eeeee llll llll  aaaaa
+//
+// Copyright (c) 1995-2017 by Bradford W. Mott, Stephen Anthony
+// and the Stella Team
+//
+// See the file "License.txt" for information on usage and redistribution of
+// this file, and for a DISCLAIMER OF ALL WARRANTIES.
+//============================================================================
+
+#include "Dialog.hxx"
+#include "Font.hxx"
+#include "EventHandler.hxx"
+#include "FrameBuffer.hxx"
+#include "OSystem.hxx"
+#include "Widget.hxx"
+#include "RewindDialog.hxx"
+
+// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
+RewindDialog::RewindDialog(OSystem& osystem, DialogContainer& parent,
+                           int max_w, int max_h)
+  : Dialog(osystem, parent)
+{
+  const GUI::Font& font = instance().frameBuffer().font();
+  const int buttonWidth = font.getStringWidth("Right Diff B") + 20,
+            buttonHeight = font.getLineHeight() + 6,
+            rowHeight = font.getLineHeight() + 10;
+
+  // Set real dimensions
+  _w = 3 * (buttonWidth + 5) + 20;
+  _h = 6 * rowHeight + 15;
+}

src/gui/RewindDialog.hxx

@@ -0,0 +1,42 @@
+//============================================================================
+//
+//   SSSS    tt          lll  lll
+//  SS  SS   tt           ll   ll
+//  SS     tttttt  eeee   ll   ll   aaaa
+//   SSSS    tt   ee  ee  ll   ll      aa
+//      SS   tt   eeeeee  ll   ll   aaaaa  --  "An Atari 2600 VCS Emulator"
+//  SS  SS   tt   ee      ll   ll  aa  aa
+//   SSSS     ttt  eeeee llll llll  aaaaa
+//
+// Copyright (c) 1995-2017 by Bradford W. Mott, Stephen Anthony
+// and the Stella Team
+//
+// See the file "License.txt" for information on usage and redistribution of
+// this file, and for a DISCLAIMER OF ALL WARRANTIES.
+//============================================================================
+
+#ifndef REWIND_DIALOG_HXX
+#define REWIND_DIALOG_HXX
+
+class CommandSender;
+class DialogContainer;
+class OSystem;
+
+#include "Dialog.hxx"
+
+class RewindDialog : public Dialog
+{
+  public:
+    RewindDialog(OSystem& osystem, DialogContainer& parent, int max_w, int max_h);
+    virtual ~RewindDialog() = default;
+
+  private:
+    // Following constructors and assignment operators not supported
+    RewindDialog() = delete;
+    RewindDialog(const RewindDialog&) = delete;
+    RewindDialog(RewindDialog&&) = delete;
+    RewindDialog& operator=(const RewindDialog&) = delete;
+    RewindDialog& operator=(RewindDialog&&) = delete;
+};
+
+#endif

src/gui/Rewinder.cxx

@@ -0,0 +1,29 @@
+//============================================================================
+//
+//   SSSS    tt          lll  lll
+//  SS  SS   tt           ll   ll
+//  SS     tttttt  eeee   ll   ll   aaaa
+//   SSSS    tt   ee  ee  ll   ll      aa
+//      SS   tt   eeeeee  ll   ll   aaaaa  --  "An Atari 2600 VCS Emulator"
+//  SS  SS   tt   ee      ll   ll  aa  aa
+//   SSSS     ttt  eeeee llll llll  aaaaa
+//
+// Copyright (c) 1995-2017 by Bradford W. Mott, Stephen Anthony
+// and the Stella Team
+//
+// See the file "License.txt" for information on usage and redistribution of
+// this file, and for a DISCLAIMER OF ALL WARRANTIES.
+//============================================================================
+
+#include "Dialog.hxx"
+#include "FrameBuffer.hxx"
+#include "RewindDialog.hxx"
+#include "Rewinder.hxx"
+
+// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
+Rewinder::Rewinder(OSystem& osystem)
+  : DialogContainer(osystem)
+{
+  myBaseDialog = new RewindDialog(myOSystem, *this,
+      FrameBuffer::kFBMinW, FrameBuffer::kFBMinH);
+}

src/gui/Rewinder.hxx

@@ -0,0 +1,45 @@
+//============================================================================
+//
+//   SSSS    tt          lll  lll
+//  SS  SS   tt           ll   ll
+//  SS     tttttt  eeee   ll   ll   aaaa
+//   SSSS    tt   ee  ee  ll   ll      aa
+//      SS   tt   eeeeee  ll   ll   aaaaa  --  "An Atari 2600 VCS Emulator"
+//  SS  SS   tt   ee      ll   ll  aa  aa
+//   SSSS     ttt  eeeee llll llll  aaaaa
+//
+// Copyright (c) 1995-2017 by Bradford W. Mott, Stephen Anthony
+// and the Stella Team
+//
+// See the file "License.txt" for information on usage and redistribution of
+// this file, and for a DISCLAIMER OF ALL WARRANTIES.
+//============================================================================
+
+#ifndef REWINDER_HXX
+#define REWINDER_HXX
+
+class OSystem;
+
+#include "DialogContainer.hxx"
+
+/**
+  The base dialog for all rewind-related UI items in Stella.
+
+  @author  Stephen Anthony
+*/
+class Rewinder : public DialogContainer
+{
+  public:
+    Rewinder(OSystem& osystem);
+    virtual ~Rewinder() = default;
+
+  private:
+    // Following constructors and assignment operators not supported
+    Rewinder() = delete;
+    Rewinder(const Rewinder&) = delete;
+    Rewinder(Rewinder&&) = delete;
+    Rewinder& operator=(const Rewinder&) = delete;
+    Rewinder& operator=(Rewinder&&) = delete;
+};
+
+#endif

src/gui/module.mk

@@ -37,6 +37,8 @@ MODULE_OBJS := \
 	src/gui/PopUpWidget.o \
 	src/gui/ProgressDialog.o \
 	src/gui/RadioButtonWidget.o \
+	src/gui/Rewinder.o \
+	src/gui/RewindDialog.o \
 	src/gui/RomAuditDialog.o \
 	src/gui/RomInfoWidget.o \
 	src/gui/ScrollBarWidget.o \