PEGASUS: Add and hookup the InputHandler class

6 files changed, 191 insertions, 9 deletions

diff --git a/engines/pegasus/input.cpp b/engines/pegasus/input.cpp
index bb147fb716..37f9945634 100755
--- a/engines/pegasus/input.cpp
+++ b/engines/pegasus/input.cpp
@@ -26,7 +26,9 @@
 #include "common/events.h"
 #include "common/system.h"
 
+#include "pegasus/cursor.h"
 #include "pegasus/input.h"
+#include "pegasus/pegasus.h"
 
 namespace Pegasus {
 
@@ -135,4 +137,134 @@ int operator!=(const Input &arg1, const Input &arg2) {
 	return !operator==(arg1, arg2);
 }
 
+InputHandler *InputHandler::_inputHandler = 0;
+InputDevice InputHandler::_inputDevice;
+bool InputHandler::_invalHotspots = false;
+tInputBits InputHandler::_lastFilter = kFilterNoInput;
+
+InputHandler *InputHandler::setInputHandler(InputHandler *currentHandler) {
+	InputHandler *result = 0;
+
+	if (_inputHandler != currentHandler && (!_inputHandler || _inputHandler->releaseInputFocus())) {
+		result = _inputHandler;
+		_inputHandler = currentHandler;
+		if (_inputHandler)
+			_inputHandler->grabInputFocus();
+	}
+
+	return result;
+}
+
+void InputHandler::pollForInput() {
+	if (_inputHandler) {
+		Input input;
+		Hotspot *cursorSpot;
+
+		InputHandler::getInput(input, cursorSpot);
+		if (_inputHandler->isClickInput(input, cursorSpot))
+			_inputHandler->clickInHotspot(input, cursorSpot);
+		else
+			_inputHandler->handleInput(input, cursorSpot);
+	}
+}
+
+void InputHandler::getInput(Input &input, Hotspot *&cursorSpot) {
+	Cursor *cursor = ((PegasusEngine *)g_engine)->_cursor;
+	
+	if (_inputHandler)
+		_lastFilter = _inputHandler->getInputFilter();
+	else
+		_lastFilter = kFilterAllInput;
+
+	_inputDevice.getInput(input, _lastFilter);
+
+	if (_inputHandler && _inputHandler->wantsCursor() && (_lastFilter & _inputHandler->getClickFilter()) != 0) {
+		if (cursor->isVisible()) {
+			g_allHotspots.deactivateAllHotspots();
+			_inputHandler->activateHotspots();
+
+			Common::Point cursorLocation;
+			cursor->getCursorLocation(cursorLocation);
+			cursorSpot = g_allHotspots.findHotspot(cursorLocation);
+
+			if (_inputHandler)
+				_inputHandler->updateCursor(cursorLocation, cursorSpot);
+		} else {
+			cursor->hideUntilMoved();
+		}
+	} else {
+		cursor->hide();
+	}
+}
+
+void InputHandler::readInputDevice(Input &input) {
+	_inputDevice.getInput(input, kFilterAllInput);
+}
+
+InputHandler::InputHandler(InputHandler *nextHandler) {
+	_nextHandler = nextHandler;
+	allowInput(true);
+}
+
+InputHandler::~InputHandler() {
+	if (_inputHandler == this)
+		setInputHandler(_nextHandler);
+}
+
+void InputHandler::handleInput(const Input &input, const Hotspot *cursorSpot) {
+	if (_nextHandler)
+		_nextHandler->handleInput(input, cursorSpot);
+}
+
+void InputHandler::clickInHotspot(const Input &input, const Hotspot *cursorSpot) {
+	if (_nextHandler)
+		_nextHandler->clickInHotspot(input, cursorSpot);
+}
+
+bool InputHandler::isClickInput(const Input &input, const Hotspot *cursorSpot) {
+	if (_nextHandler)
+		return _nextHandler->isClickInput(input, cursorSpot);
+
+	return false;
+}
+
+void InputHandler::activateHotspots() {
+	if (_nextHandler)
+		_nextHandler->activateHotspots();
+}
+
+tInputBits InputHandler::getInputFilter() {
+	if (_allowInput) {
+		if (_nextHandler)
+			return _nextHandler->getInputFilter();
+		else
+			return kFilterAllInput;
+	}
+
+	return kFilterNoInput;
+}
+
+tInputBits InputHandler::getClickFilter() {
+	if (_allowInput && _nextHandler)
+		return _nextHandler->getClickFilter();
+
+	return kFilterNoInput;
+}
+
+void InputHandler::updateCursor(const Common::Point cursorLocation, const Hotspot *cursorSpot) {
+	if (_nextHandler)
+		_nextHandler->updateCursor(cursorLocation, cursorSpot);
+}
+
+bool InputHandler::wantsCursor() {
+	if (_allowInput) {
+		if (_nextHandler)
+			return _nextHandler->wantsCursor();
+		else
+			return true;
+	}
+
+	return false;
+}
+
 } // End of namespace Pegasus
diff --git a/engines/pegasus/input.h b/engines/pegasus/input.h
index 463e3d024b..432ff8098b 100755
--- a/engines/pegasus/input.h
+++ b/engines/pegasus/input.h
@@ -368,6 +368,52 @@ protected:
 	Common::Point _inputLocation;
 };
 
+class InputHandler {
+public:
+	static InputHandler *setInputHandler(InputHandler*);
+	static InputHandler *getCurrentHandler() { return _inputHandler; }
+	static InputDevice *getCurrentInputDevice() { return &_inputDevice; }
+	static void pollForInput();
+	static void getInput(Input&, Hotspot*&);
+	static void readInputDevice(Input&);
+	static void invalHotspots() { _invalHotspots = true; }
+	static tInputBits getCurrentFilter() { return _lastFilter; }
+		
+	InputHandler(InputHandler*);
+	virtual ~InputHandler();
+	
+	virtual void setNextHandler(InputHandler *nextHandler) { _nextHandler = nextHandler; }
+	virtual InputHandler *getNextHandler() { return _nextHandler; }
+	
+	virtual void handleInput(const Input&, const Hotspot*);
+	virtual void clickInHotspot(const Input&, const Hotspot*);
+	
+	virtual void activateHotspots();
+	virtual void updateCursor(const Common::Point, const Hotspot*);
+	virtual bool isClickInput(const Input&, const Hotspot*);
+	virtual bool wantsCursor();
+	
+	virtual bool releaseInputFocus() { return true; }
+	virtual void grabInputFocus() {}
+	
+	//	This returns bits set for what kinds of input to accept.
+	virtual tInputBits getInputFilter();
+
+	//	This returns bits defining what input constitutes a "click."
+	virtual tInputBits getClickFilter();
+
+	virtual void allowInput(const bool allow) { _allowInput = allow; }
+
+protected:
+	static InputHandler *_inputHandler;
+	static InputDevice _inputDevice; // TODO: Remove global constructor
+	static bool _invalHotspots;
+	static tInputBits _lastFilter;
+	
+	InputHandler *_nextHandler;
+	bool _allowInput;
+};
+
 } // End of namespace Pegasus
 
 #endif
diff --git a/engines/pegasus/neighborhood/neighborhood.cpp b/engines/pegasus/neighborhood/neighborhood.cpp
index 461f4b0149..75a8df9028 100644
--- a/engines/pegasus/neighborhood/neighborhood.cpp
+++ b/engines/pegasus/neighborhood/neighborhood.cpp
@@ -33,7 +33,7 @@
 
 namespace Pegasus {
 
-Neighborhood::Neighborhood(PegasusEngine *vm, const Common::String &resName, tNeighborhoodID id) : IDObject(id), _vm(vm), _resName(resName) {
+Neighborhood::Neighborhood(InputHandler *nextHandler, PegasusEngine *vm, const Common::String &resName, tNeighborhoodID id) : InputHandler(nextHandler), IDObject(id), _vm(vm), _resName(resName) {
 	GameState.setOpenDoorLocation(kNoRoomID, kNoDirection);
 	_currentAlternate = 0;
 	_interruptionFilter = kFilterAllInput;
diff --git a/engines/pegasus/neighborhood/neighborhood.h b/engines/pegasus/neighborhood/neighborhood.h
index baeed7d124..d294ffe7f0 100644
--- a/engines/pegasus/neighborhood/neighborhood.h
+++ b/engines/pegasus/neighborhood/neighborhood.h
@@ -84,9 +84,9 @@ bool operator!=(const tQueueRequest &arg1, const tQueueRequest &arg2);
 
 typedef Common::Queue<tQueueRequest> NeighborhoodActionQueue;
 
-class Neighborhood : public IDObject, public NotificationReceiver {
+class Neighborhood : public IDObject, public NotificationReceiver, public InputHandler {
 public:
-	Neighborhood(PegasusEngine *vm, const Common::String &resName, tNeighborhoodID id);
+	Neighborhood(InputHandler *nextHandler, PegasusEngine *vm, const Common::String &resName, tNeighborhoodID id);
 	virtual ~Neighborhood();
 
 	virtual void init();
diff --git a/engines/pegasus/pegasus.cpp b/engines/pegasus/pegasus.cpp
index f604a2488a..39eb7d50c4 100644
--- a/engines/pegasus/pegasus.cpp
+++ b/engines/pegasus/pegasus.cpp
@@ -48,7 +48,7 @@
 
 namespace Pegasus {
 
-PegasusEngine::PegasusEngine(OSystem *syst, const PegasusGameDescription *gamedesc) : Engine(syst), _gameDescription(gamedesc) {
+PegasusEngine::PegasusEngine(OSystem *syst, const PegasusGameDescription *gamedesc) : Engine(syst), InputHandler(0), _gameDescription(gamedesc) {
 }
 
 PegasusEngine::~PegasusEngine() {
@@ -279,7 +279,7 @@ void PegasusEngine::changeLocation(tNeighborhoodID neighborhood) {
 	GameState.setCurrentNeighborhood(neighborhood);
 
 	// Just a test...
-	Neighborhood *neighborhoodPtr = new Neighborhood(this, getTimeZoneDesc(neighborhood), neighborhood);
+	Neighborhood *neighborhoodPtr = new Neighborhood(this, this, getTimeZoneDesc(neighborhood), neighborhood);
 	neighborhoodPtr->init();
 	delete neighborhoodPtr;
 }
diff --git a/engines/pegasus/pegasus.h b/engines/pegasus/pegasus.h
index 35ee117ed4..8ab891df9c 100644
--- a/engines/pegasus/pegasus.h
+++ b/engines/pegasus/pegasus.h
@@ -33,6 +33,7 @@
 #include "engines/engine.h"
 
 #include "pegasus/graphics.h"
+#include "pegasus/input.h"
 #include "pegasus/video.h"
 #include "pegasus/neighborhood/neighborhood.h"
 
@@ -64,9 +65,8 @@ enum GameMode {
 	kQuitMode
 };
 
-class PegasusEngine : public ::Engine {
-protected:
-	Common::Error run();
+class PegasusEngine : public ::Engine, public InputHandler {
+friend class InputHandler;
 
 public:
 	PegasusEngine(OSystem *syst, const PegasusGameDescription *gamedesc);
@@ -85,6 +85,11 @@ public:
 	void addIdler(Idler *idler);
 	void removeIdler(Idler *idler);
 
+protected:
+	Common::Error run();
+
+	Cursor *_cursor;
+
 private:
 	// Intro
 	void runIntro();
@@ -132,7 +137,6 @@ private:
 	// Idlers
 	Common::List<Idler *> _idlers;
 	void giveIdleTime();
-	Cursor *_cursor;
 
 	// Items
 	void createItems();