X-Git-Url: https://git.artsoft.org/?a=blobdiff_plain;f=src%2Flibgame%2Fsystem.h;h=73fc371603eaf3d6afb3953e1f7b2908137ad545;hb=1be3e5c990b84f8548a80ccd6b7b209a88312141;hp=5249adfcb599df787c497ba9aa6ba153949eedfb;hpb=5f9b6d3b52c7f8dc10c01782d466a1e8f5ca5f26;p=rocksndiamonds.git

diff --git a/src/libgame/system.h b/src/libgame/system.h
index 5249adfc..73fc3716 100644
--- a/src/libgame/system.h
+++ b/src/libgame/system.h
@@ -118,6 +118,11 @@
 #define SCREEN_KEYBOARD_POS(h)		((h) / 2)
 #endif
 
+// values for drag-and-drop support (some parts not added before SDL 2.0.5)
+#if SDL_VERSION_ATLEAST(2,0,5)
+#define USE_DRAG_AND_DROP
+#endif
+
 // default input keys
 #define DEFAULT_KEY_LEFT		KSYM_Left
 #define DEFAULT_KEY_RIGHT		KSYM_Right
@@ -753,6 +758,16 @@
 				 &artwork.mus_first :			\
 				 NULL)
 
+#define TREE_FIRST_NODE(t)	((t) == TREE_TYPE_LEVEL_DIR ?		\
+				 leveldir_first :			\
+				 (t) == TREE_TYPE_GRAPHICS_DIR ?	\
+				 artwork.gfx_first :			\
+				 (t) == TREE_TYPE_SOUNDS_DIR ?		\
+				 artwork.snd_first :			\
+				 (t) == TREE_TYPE_MUSIC_DIR ?		\
+				 artwork.mus_first :			\
+				 NULL)
+
 // values for artwork handling
 #define LEVELDIR_ARTWORK_SET_PTR(leveldir, type)			\
 				((type) == ARTWORK_TYPE_GRAPHICS ?	\