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engines/wintermute/ext/plugin_event.h

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+/* 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 3 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, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+#ifndef WINTERMUTE_PLUGIN_EVENT_H
+#define WINTERMUTE_PLUGIN_EVENT_H
+
+namespace Wintermute {
+
+//////////////////////////////////////////////////////////////////////////
+// WME events
+typedef enum {
+	WME_EVENT_UPDATE = 0,
+	WME_EVENT_SCENE_DRAW_BEGIN,
+	WME_EVENT_SCENE_DRAW_END,
+	WME_EVENT_SCENE_INIT,
+	WME_EVENT_SCENE_SHUTDOWN,
+	WME_EVENT_GAME_BEFORE_SAVE,
+	WME_EVENT_GAME_AFTER_LOAD,
+	WME_EVENT_MAX
+} EWmeEvent;
+
+typedef void (*PluginApplyEvent)(void *, void *);
+
+typedef struct _PluginEventEntry {
+	EWmeEvent        _type;
+	PluginApplyEvent _callback;
+	void             *_plugin;
+} PluginEventEntry;
+
+class PluginEvent {
+public:
+	PluginEvent() {};
+	~PluginEvent() {};
+
+	void subscribeEvent(PluginEventEntry &event) {
+		for (auto it = _entries.begin(); it != _entries.end(); ++it) {
+			if (event._type == (*it)._type && event._callback == (*it)._callback) {
+				break;
+			}
+		}
+		_entries.push_back(event);
+	}
+
+	void unsubscribeEvent(PluginEventEntry &event) {
+		for (auto it = _entries.begin(); it != _entries.end(); ++it) {
+			if (event._type == (*it)._type && event._callback == (*it)._callback) {
+				_entries.erase(it);
+				break;
+			}
+		}
+	}
+
+	void applyEvent(EWmeEvent type, void *eventData) {
+		for (auto it = _entries.begin(); it != _entries.end(); ++it) {
+			if (type == (*it)._type && (*it)._callback != nullptr) {
+				(*it)._callback(eventData, (*it)._plugin);
+			}
+		}
+	}
+
+	void clearEvents() {
+		_entries.clear();
+	}
+
+private:
+	Common::List<PluginEventEntry> _entries;
+};
+
+} // End of namespace Wintermute
+
+#endif