Mouse handling is way better but still want to refine it more if I can.

Makefile

@@ -65,7 +65,7 @@ debug: build
 	gdb --nx -x .gdbinit --ex run --args builddir/runtests
 
 debug_run: build
-	gdb --nx -x .gdbinit --batch --ex run --ex bt --ex q --args builddir/multiscreen
+	gdb --nx -x .gdbinit --batch --ex run --ex bt --ex q --args builddir/under_the_dome
 
 debug_walk: build test
 	gdb --nx -x .gdbinit --batch --ex run --ex bt --ex q --args builddir/under_the_dome t

meson.build

@@ -65,6 +65,9 @@ json = subproject('nlohmann_json').get_variable('nlohmann_json_dep')
 freetype2 = subproject('freetype2').get_variable('freetype_dep')
 
 flac = subproject('flac').get_variable('flac_dep')
+magic_enum_proj = subproject('magic_enum', default_options: {
+  'test': false})
+magic_enum = magic_enum_proj.get_variable('magic_enum_dep')
 ogg = subproject('ogg').get_variable('libogg_dep')
 vorbis = subproject('vorbis').get_variable('vorbis_dep')
 vorbisfile = subproject('vorbis').get_variable('vorbisfile_dep')
@@ -82,7 +85,7 @@ subdir('src')
 subdir('tests')
 
 dependencies += [
-  fmt, json, freetype2,
+  fmt, json, freetype2, magic_enum,
   flac, ogg, vorbis, vorbisfile, vorbisenc,
   sfml_audio, sfml_graphics,
   sfml_network, sfml_system,

src/algos/simplefsm.hpp

@@ -1,12 +1,12 @@
 #pragma once
-
 #include <fmt/core.h>
 
 #ifndef FSM_DEBUG
 #define FSM_STATE(C, S, E, ...) case C::S: S(E, ##__VA_ARGS__); break
 #else
+#include <magic_enum/magic_enum.hpp>
 static int last_event=-1;
-#define FSM_STATE(C, S, E, ...) case C::S: if(last_event != int(E)) { last_event = int(E); fmt::println(">> [{}] " #C " " #S " event={}, state={}", __FILE__, int(E), int($state));}; S(E, ##__VA_ARGS__); break
+#define FSM_STATE(C, S, E, ...) case C::S: if(last_event != int(E)) { last_event = int(E); fmt::println(">> [{}:EVENT] " #S " event={}", FSM_DEBUG, magic_enum::enum_name(E));}; S(E, ##__VA_ARGS__); break
 #endif
 
 template<typename S, typename E>
@@ -21,7 +21,7 @@ public:
 
   void state(S next_state) {
 #ifdef FSM_DEBUG
-    fmt::println("<< STATE: {} -> {}", int($state), int(next_state));
+    fmt::println(">> [{}:TRANS]: {} -> {}", FSM_DEBUG, magic_enum::enum_name($state), magic_enum::enum_name(next_state));
 #endif
     $state = next_state;
   }

src/gui/dnd_loot.cpp

@@ -1,4 +1,4 @@
-#define FSM_DEBUG 1
+#define FSM_DEBUG "dnd_loot"
 #include "gui/guecstra.hpp"
 #include "gui/dnd_loot.hpp"
 

src/gui/event_router.cpp

@@ -1,3 +1,4 @@
+#define FSM_DEBUG "router"
 #include "event_router.hpp"
 #include "dbc.hpp"
 #include "events.hpp"

src/gui/event_router.hpp

@@ -8,11 +8,11 @@
 namespace gui {
   namespace routing {
     enum class State {
-      START,
+      START=__LINE__,
-      IDLE,
+      IDLE=__LINE__,
-      MOUSE_ACTIVE,
+      MOUSE_ACTIVE=__LINE__,
-      MOUSE_MOVING,
+      MOUSE_MOVING=__LINE__,
-      MOUSE_DRAGGING
+      MOUSE_DRAGGING=__LINE__
     };
 
     enum class Event {

src/gui/fsm.cpp

@@ -1,4 +1,4 @@
-#define FSM_DEBUG 1
+#define FSM_DEBUG "fsm"
 #include "gui/fsm.hpp"
 #include <iostream>
 #include <chrono>
@@ -321,8 +321,15 @@ namespace gui {
             break; // ignored
         }
       } else {
-        // event(gui_ev, {mouse_mods});
+        switch(gui_ev) {
+          case game::Event::MOUSE_DRAG_START:
+          case game::Event::MOUSE_CLICK:
+          case game::Event::MOUSE_DROP:
             mouse_action();
+            break;
+          default:
+            event(gui_ev, {mouse_mods});
+        }
       }
     }
   }

src/gui/guecstra.cpp

@@ -1,20 +1,22 @@
 #include "gui/guecstra.hpp"
 #include "game/level.hpp"
+#include <magic_enum/magic_enum.hpp>
+#include "dbc.hpp"
 
 namespace guecs {
 
-  Clickable make_action(guecs::Entity gui_id, game::Event event) {
+  Clickable make_action(guecs::Entity gui_id, game::Event event, const std::source_location location) {
-    return {[&, gui_id, event](auto){
+    return {[&, gui_id, event, location](guecs::Modifiers mods){
       auto world = GameDB::current_world();
-      fmt::println("!!!!! SENDING EVENT: {}", int(event));
+      dbc::log($F("SENDING EVENT: {}: {}", magic_enum::enum_name(event), mods.to_string()), location);
       world->send<game::Event>(event, gui_id, {});
     }};
   }
 
-  Clickable make_action(guecs::Entity gui_id, game::Event event, std::any data) {
+  Clickable make_action(guecs::Entity gui_id, game::Event event, std::any data, const std::source_location location) {
-    return {[&, event, data](auto){
+    return {[&, event, data, location](auto){
       auto world = GameDB::current_world();
-      fmt::println("!!!!! SENDING EVENT with data: {}", int(event));
+      dbc::log($F("SENDING EVENT: {}", magic_enum::enum_name(event)), location);
       world->send<game::Event>(event, gui_id, data);
     }};
   }

src/gui/guecstra.hpp

@@ -5,8 +5,10 @@
 #include "graphics/textures.hpp"
 
 namespace guecs {
-  Clickable make_action(guecs::Entity gui_id, game::Event event);
+  Clickable make_action(guecs::Entity gui_id, game::Event event,
-  Clickable make_action(guecs::Entity gui_id, game::Event event, std::any data);
+      const std::source_location location = std::source_location::current());
+  Clickable make_action(guecs::Entity gui_id, game::Event event, std::any data,
+      const std::source_location location = std::source_location::current());
 
   struct GrabSource {
     DinkyECS::Entity world_entity;

wraps/magic_enum.wrap

@@ -0,0 +1,10 @@
+[wrap-file]
+directory = magic_enum-0.9.7
+source_url = https://github.com/Neargye/magic_enum/archive/refs/tags/v0.9.7.tar.gz
+source_filename = magic_enum-v0.9.7.tar.gz
+source_hash = b403d3dad4ef542fdc3024fa37d3a6cedb4ad33c72e31b6d9bab89dcaf69edf7
+source_fallback_url = https://github.com/mesonbuild/wrapdb/releases/download/magic_enum_0.9.7-1/magic_enum-v0.9.7.tar.gz
+wrapdb_version = 0.9.7-1
+
+[provide]
+magic_enum = magic_enum_dep