Implemented a simple EventManager class

svn-id: r26154

2 files changed, 148 insertions, 0 deletions

diff --git a/backends/events/default/default-events.cpp b/backends/events/default/default-events.cpp
new file mode 100644
index 0000000000..9c92eef1d2
--- /dev/null
+++ b/backends/events/default/default-events.cpp
@@ -0,0 +1,87 @@
+/* ScummVM - Scumm Interpreter
+ * Copyright (C) 2002-2007 The ScummVM project
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ *
+ * $URL$
+ * $Id$
+ *
+ */
+
+#if !defined(DISABLE_DEFAULT_EVENTMANAGER)
+
+#include "common/stdafx.h"
+#include "common/system.h"
+#include "backends/events/default/default-events.h"
+
+DefaultEventManager::DefaultEventManager(OSystem *boss) :
+	_boss(boss),
+	_buttonState(0),
+	_modifierState(0),
+	_shouldQuit(false) {
+
+ 	assert(_boss);
+}
+
+DefaultEventManager::~DefaultEventManager() {
+
+}
+
+bool DefaultEventManager::pollEvent(OSystem::Event &event) {
+	bool result;
+	
+	result = _boss->pollEvent(event);
+	
+	if (result) {
+		switch (event.type) {
+		case OSystem::EVENT_KEYDOWN:
+		case OSystem::EVENT_KEYUP:
+			_modifierState = event.kbd.flags;
+			break;
+		case OSystem::EVENT_MOUSEMOVE:
+			_mousePos = event.mouse;
+			break;
+
+		case OSystem::EVENT_LBUTTONDOWN:
+			_mousePos = event.mouse;
+			_buttonState |= LBUTTON;
+			break;
+		case OSystem::EVENT_LBUTTONUP:
+			_mousePos = event.mouse;
+			_buttonState &= ~LBUTTON;
+			break;
+
+		case OSystem::EVENT_RBUTTONDOWN:
+			_mousePos = event.mouse;
+			_buttonState |= RBUTTON;
+			break;
+		case OSystem::EVENT_RBUTTONUP:
+			_mousePos = event.mouse;
+			_buttonState &= ~RBUTTON;
+			break;
+
+		case OSystem::EVENT_QUIT:
+			_shouldQuit = true;
+			break;
+
+		default:
+			break;
+		}
+	}
+	
+	return result;
+}
+
+#endif // !defined(DISABLE_DEFAULT_EVENTMANAGER)
diff --git a/backends/events/default/default-events.h b/backends/events/default/default-events.h
new file mode 100644
index 0000000000..3291257f01
--- /dev/null
+++ b/backends/events/default/default-events.h
@@ -0,0 +1,61 @@
+/* ScummVM - Scumm Interpreter
+ * Copyright (C) 2002-2007 The ScummVM project
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ *
+ * $URL$
+ * $Id$
+ *
+ */
+
+#if !defined(BACKEND_SAVES_DEFAULT_H) && !defined(DISABLE_DEFAULT_EVENTMANAGER)
+#define BACKEND_SAVES_DEFAULT_H
+
+#include "common/stdafx.h"
+#include "common/events.h"
+
+/*
+At some point we will remove pollEvent from OSystem and change
+DefaultEventManager to use a "boss" derived from this class:
+class EventProvider {
+public
+	virtual bool pollEvent(Common::Event &event) = 0;
+};
+
+Backends which wish to use the DefaultEventManager then simply can
+use a subclass of EventProvider.
+*/
+
+class DefaultEventManager : public Common::EventManager {
+	OSystem *_boss;
+
+	Common::Point _mousePos;
+	int _buttonState;
+	int _modifierState;
+	bool _shouldQuit;
+
+public:
+	DefaultEventManager(OSystem *boss);
+	~DefaultEventManager();
+
+	virtual bool pollEvent(OSystem::Event &event);
+
+	virtual Common::Point getMousePos() const { return _mousePos; }
+	virtual int getButtonState() const { return _buttonState; }
+	virtual int getModifierState() const { return _modifierState; }
+	virtual int shouldQuit() const { return _shouldQuit; }
+};
+
+#endif