diff --git a/src/stage/interact/interaction-state.hpp b/src/stage/interact/interaction-state.hpp
index 4b7cccd21..299db28a9 100644
--- a/src/stage/interact/interaction-state.hpp
+++ b/src/stage/interact/interaction-state.hpp
@@ -30,6 +30,13 @@
** @todo as of 11/2015 this is complete WIP-WIP-WIP
** @todo and as of 3/2021 this is at least just WIP-WIP
**
+ ** @todo *Future Plan*: in the general case, detecting and handling of complex
+ ** UI interactions and gestures translates itself into a state machine,
+ ** maybe even a hierarchical compound of state machines, where the
+ ** subordinate state machines will detect and handle elementary gestures.
+ ** The role of InteractionState will then be to provide the building blocks
+ ** and interfaces for assembling such complex state tracking engines.
+ **
** @see ////TODO_test usage example
**
*/
diff --git a/wiki/thinkPad.ichthyo.mm b/wiki/thinkPad.ichthyo.mm
index cbc12cc74..7feec1de1 100644
--- a/wiki/thinkPad.ichthyo.mm
+++ b/wiki/thinkPad.ichthyo.mm
@@ -6,7 +6,20 @@
-
+
+
+
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+
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+
+
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@@ -32665,6 +32678,19 @@
+
+
+
+
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+
+
+ Hierarchische Gesten-Controller
+
+
+
+
+
@@ -32737,8 +32763,7 @@
* can also cause #GdkEventGrabBroken events.