From ca7880df6cbbb7fbc5bf58230f2f6255b0289b37 Mon Sep 17 00:00:00 2001
From: Max Horn
Date: Fri, 4 Aug 2006 13:10:28 +0000
Subject: Added new method OSystem::getScreenChangeID(), which can be used by
 code to track screen changes even without getting all EVENT_SCREEN_CHANGED
 events

svn-id: r23661
---
 common/system.h | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

(limited to 'common/system.h')

diff --git a/common/system.h b/common/system.h
index 776e76798a..91ea05b928 100644
--- a/common/system.h
+++ b/common/system.h
@@ -309,6 +309,21 @@ public:
 	 */
 	virtual void initSize(uint width, uint height) = 0;
 
+	/**
+	 * Return an int value which is changed whenever any screen
+	 * parameters (like the resolution) change. That is, whenever a
+	 * EVENT_SCREEN_CHANGED would be sent. You can track this value
+	 * in your code to detect screen changes in case you do not have
+	 * full control over the event loop(s) being used (like the GUI
+	 * code).
+	 *
+	 * @return an integer which can be used to track screen changes
+	 *
+	 * @note Backends which generate EVENT_SCREEN_CHANGED events MUST
+	 *       overload this method appropriately.
+	 */
+	virtual int getScreenChangeID() const { return 0; }
+
 	/**
 	 * Begin a new GFX transaction, which is a sequence of GFX mode changes.
 	 * The idea behind GFX transactions is to make it possible to activate
-- 
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