ZVISION: Add ActionNode class

This class encases actions that happen over time (timer, animations, etc)
Each frame, the engine calls process() on each active ActionNode

2 files changed, 103 insertions, 0 deletions

diff --git a/engines/zvision/action_node.cpp b/engines/zvision/action_node.cpp
new file mode 100644
index 0000000000..dec52d9615
--- /dev/null
+++ b/engines/zvision/action_node.cpp
@@ -0,0 +1,45 @@
+/* ScummVM - Graphic Adventure Engine
+ *
+ * ScummVM is the legal property of its developers, whose names
+ * are too numerous to list here. Please refer to the COPYRIGHT
+ * file distributed with this source distribution.
+ *
+ * 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.
+ *
+ */
+
+#include "common/scummsys.h"
+
+#include "zvision/action_node.h"
+#include "zvision/zvision.h"
+#include "zvision/script_manager.h"
+
+namespace ZVision {
+
+NodeTimer::NodeTimer(uint32 key, uint32 timeInSeconds) 
+	: _key(key), _timeLeft(timeInSeconds * 1000) {}
+
+bool NodeTimer::process(ZVision *engine, uint32 deltaTimeInMillis) {
+	_timeLeft -= deltaTimeInMillis;
+
+	if (_timeLeft <= 0) {
+		engine->getScriptManager()->setStateValue(_key, 0);
+		return true;
+	}
+
+	return false;
+}
+
+} // End of namespace ZVision
diff --git a/engines/zvision/action_node.h b/engines/zvision/action_node.h
new file mode 100644
index 0000000000..cd5c9f3b27
--- /dev/null
+++ b/engines/zvision/action_node.h
@@ -0,0 +1,58 @@
+/* ScummVM - Graphic Adventure Engine
+ *
+ * ScummVM is the legal property of its developers, whose names
+ * are too numerous to list here. Please refer to the COPYRIGHT
+ * file distributed with this source distribution.
+ *
+ * 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.
+ *
+ */
+
+#ifndef ZVISION_ACTION_NODE_H
+#define ZVISION_ACTION_NODE_H
+
+#include "common/types.h"
+
+namespace ZVision {
+
+class ZVision;
+
+class ActionNode {
+public:
+	virtual ~ActionNode() {}
+	virtual bool process(ZVision *engine, uint32 deltaTimeInMillis);
+};
+
+class NodeTimer : public ActionNode {
+public:
+	NodeTimer(uint32 key, uint32 timeInSeconds);
+	/**
+	 * Decrement the timer by the delta time. If the timer is finished, set the status
+	 * in _globalState and let this node be deleted
+	 *
+	 * @param engine               Pointer to the ZVision instance
+	 * @param deltaTimeInMillis    Amount of time that has passed since the last frame
+	 * @return    Node should be deleted after this (true) or kept (false)
+	 */
+	bool process(ZVision *engine, uint32 deltaTimeInMillis);
+
+private:
+	uint32 _key;
+	uint32 _timeLeft;
+};
+
+} // End of namespace ZVision
+
+#endif