MOHAWK: Add a return to menu button to the dialog for the demo

engines/mohawk/dialogs.cpp

@@ -81,7 +81,8 @@ enum {
 	kTransCmd = 'TRAN',
 	kWaterCmd = 'WATR',
 	kDropCmd = 'DROP',
-	kMapCmd = 'SMAP'
+	kMapCmd = 'SMAP',
+	kMenuCmd = 'MENU'
 };
 
 #ifdef ENABLE_MYST
@@ -97,6 +98,12 @@ MystOptionsDialog::MystOptionsDialog(MohawkEngine_Myst* vm) : GUI::OptionsDialog
 	else
 		_showMapButton = 0;
 
+	// Myst demo only has a menu
+	if (_vm->getFeatures() & GF_DEMO)
+		_returnToMenuButton = new GUI::ButtonWidget(this, 15, 95, 100, 25, _("~M~ain Menu"), 0, kMenuCmd);
+	else
+		_returnToMenuButton = 0;
+
 	new GUI::ButtonWidget(this, 95, 160, 120, 25, _("~O~K"), 0, GUI::kOKCmd);
 	new GUI::ButtonWidget(this, 225, 160, 120, 25, _("~C~ancel"), 0, GUI::kCloseCmd);
 }
@@ -113,6 +120,11 @@ void MystOptionsDialog::open() {
 		_showMapButton->setEnabled(_vm->_scriptParser &&
 				_vm->_scriptParser->getMap());
 
+	// Return to menu button is not enabled on the menu
+	if (_returnToMenuButton)
+		_returnToMenuButton->setEnabled(_vm->_scriptParser &&
+				_vm->getCurStack() != kDemoStack);
+
 	// Zip mode is disabled in the demo
 	if (_vm->getFeatures() & GF_DEMO)
 		_zipModeCheckbox->setEnabled(false);
@@ -137,6 +149,10 @@ void MystOptionsDialog::handleCommand(GUI::CommandSender *sender, uint32 cmd, ui
 		_vm->_needsShowMap = true;
 		close();
 	break;
+	case kMenuCmd:
+		_vm->_needsShowDemoMenu = true;
+		close();
+	break;
 	case GUI::kCloseCmd:
 		close();
 		break;

engines/mohawk/dialogs.h

@@ -83,6 +83,7 @@ private:
 	GUI::CheckboxWidget *_transitionsCheckbox;
 	GUI::ButtonWidget *_dropPageButton;
 	GUI::ButtonWidget *_showMapButton;
+	GUI::ButtonWidget *_returnToMenuButton;
 };
 
 #endif

engines/mohawk/myst.cpp

@@ -343,6 +343,7 @@ Common::Error MohawkEngine_Myst::run() {
 				case Common::KEYCODE_F5:
 					_needsPageDrop = false;
 					_needsShowMap = false;
+					_needsShowDemoMenu = false;
 
 					runDialog(*_optionsDialog);
 
@@ -355,6 +356,11 @@ Common::Error MohawkEngine_Myst::run() {
 						_scriptParser->showMap();
 						_needsShowMap = false;
 					}
+
+					if (_needsShowDemoMenu) {
+						changeToStack(kDemoStack, 2002, 0, 0);
+						_needsShowDemoMenu = false;
+					}
 					break;
 				default:
 					break;

engines/mohawk/myst.h

@@ -167,6 +167,7 @@ public:
 	bool _needsUpdate;
 	bool _needsPageDrop;
 	bool _needsShowMap;
+	bool _needsShowDemoMenu;
 
 	MystView _view;
 	MystGraphics *_gfx;