+/*
+ * wxTreeCtrl flags
+ */
+// TODO: maybe renumber these?
+#define wxTR_NO_BUTTONS 0x0000 // for convenience
+#define wxTR_HAS_BUTTONS 0x0001 // generates a +/- button
+#define wxTR_TWIST_BUTTONS 0x0002 // generates a twister button
+#define wxTR_NO_LINES 0x0004 // don't generate level connectors
+#define wxTR_LINES_AT_ROOT 0x0008 // connect top-level nodes
+#define wxTR_MAC_BUTTONS wxTR_TWIST_BUTTONS // backward compatibility
+
+#define wxTR_SINGLE 0x0000 // for convenience
+#define wxTR_MULTIPLE 0x0020 // can select multiple items
+#define wxTR_EXTENDED 0x0040 // TODO: allow extended selection
+
+#define wxTR_EDIT_LABELS 0x0200 // can edit item labels
+#define wxTR_ROW_LINES 0x0400 // put border around items
+#define wxTR_HIDE_ROOT 0x0800 // don't display root node
+#define wxTR_HAS_VARIABLE_ROW_HEIGHT 0x0080 // what it says
+
+// TODO: different default styles for wxGTK, wxMotif, whatever?
+#ifdef __WXMAC__
+ #define wxTR_DEFAULT_STYLE (wxTR_TWIST_BUTTONS|wxTR_NO_LINES|wxTR_ROW_LINES)
+#else
+ #define wxTR_DEFAULT_STYLE (wxTR_HAS_BUTTONS|wxTR_LINES_AT_ROOT)
+#endif