+#define I3_IPC_EVENT_OUTPUT (I3_IPC_EVENT_MASK | 1)
+
+/* The output event will be triggered upon mode changes */
+#define I3_IPC_EVENT_MODE (I3_IPC_EVENT_MASK | 2)
+
+/* The window event will be triggered upon window changes */
+#define I3_IPC_EVENT_WINDOW (I3_IPC_EVENT_MASK | 3)