os_gfx -> report mouse move events; still allow passive mouse interaction if window is unfocused, but have recently received mousemove events

src/df/gfx/df_gfx.c

@@ -2881,8 +2881,16 @@ df_window_update_and_render(Arena *arena, OS_EventList *events, DF_Window *ws, D
         icon_info.icon_kind_text_map[UI_IconKind_CheckFilled]    = df_g_icon_kind_text_table[DF_IconKind_CheckFilled];
       }
       
+      // rjf: form mouse position used for passive UI mouse interaction
+      Vec2F32 mouse_ui = os_mouse_from_window(ws->os);
+      if(!os_window_is_focused(ws->os) &&
+         df_gfx_state->last_time_mousemoved_us+500000 <= os_now_microseconds())
+      {
+        mouse_ui = v2f32(-100, -100);
+      }
+      
       // rjf: begin & push initial stack values
-      ui_begin_build(events, ws->os, &nav_actions, &icon_info, df_dt(), df_dt());
+      ui_begin_build(events, mouse_ui, ws->os, &nav_actions, &icon_info, df_dt(), df_dt());
       ui_push_font(main_font);
       ui_push_font_size(main_font_size);
       ui_push_pref_width(ui_em(20.f, 1));

src/df/gfx/df_gfx.h

@@ -689,6 +689,7 @@ struct DF_GfxState
   
   // rjf: frame request state
   U64 num_frames_requested;
+  U64 last_time_mousemoved_us;
   
   // rjf: history cache
   DF_StateDeltaHistory *hist;

src/os/gfx/os_gfx.h

@@ -40,6 +40,7 @@ typedef enum OS_EventKind
   OS_EventKind_Null,
   OS_EventKind_Press,
   OS_EventKind_Release,
+  OS_EventKind_MouseMove,
   OS_EventKind_Text,
   OS_EventKind_Scroll,
   OS_EventKind_WindowLoseFocus,

src/os/gfx/win32/os_gfx_win32.c

@@ -429,6 +429,13 @@ w32_wnd_proc(HWND hwnd, UINT uMsg, WPARAM wParam, LPARAM lParam)
         }
       }break;
       
+      case WM_MOUSEMOVE:
+      {
+        OS_Event *event = w32_push_event(OS_EventKind_MouseMove, window);
+        event->pos.x = (F32)LOWORD(lParam);
+        event->pos.y = (F32)HIWORD(lParam);
+      }break;
+      
       case WM_MOUSEWHEEL:
       {
         S16 wheel_delta = HIWORD(wParam);

src/raddbg/raddbg.c

@@ -69,6 +69,14 @@ update_and_render(OS_Handle repaint_window_handle, void *user_data)
     OS_EventList new_events = os_get_events(scratch.arena, df_gfx_state->num_frames_requested == 0);
     os_event_list_concat_in_place(&events, &leftover_events_copy);
     os_event_list_concat_in_place(&events, &new_events);
+    for(OS_Event *e = events.first; e != 0; e = e->next)
+    {
+      if(e->kind == OS_EventKind_MouseMove)
+      {
+        df_gfx_state->last_time_mousemoved_us = os_now_microseconds();
+        break;
+      }
+    }
   }
   
   //- rjf: enable txti change detection

src/ui/ui_core.c

@@ -631,7 +631,7 @@ ui_box_from_key(UI_Key key)
 //~ rjf: Top-Level Building API
 
 internal void
-ui_begin_build(OS_EventList *events, OS_Handle window, UI_NavActionList *nav_actions, UI_IconInfo *icon_info, F32 real_dt, F32 animation_dt)
+ui_begin_build(OS_EventList *events, Vec2F32 mouse, OS_Handle window, UI_NavActionList *nav_actions, UI_IconInfo *icon_info, F32 real_dt, F32 animation_dt)
 {
   //- rjf: reset per-build ui state
   {
@@ -651,7 +651,7 @@ ui_begin_build(OS_EventList *events, OS_Handle window, UI_NavActionList *nav_act
     ui_state->events = events;
     ui_state->window = window;
     ui_state->nav_actions = nav_actions;
-    ui_state->mouse = os_window_is_focused(window) ? os_mouse_from_window(window) : v2f32(-100, -100);
+    ui_state->mouse = mouse;
     ui_state->animation_dt = animation_dt;
     MemoryZeroStruct(&ui_state->icon_info);
     ui_state->icon_info.icon_font = icon_info->icon_font;
@@ -922,7 +922,6 @@ ui_begin_build(OS_EventList *events, OS_Handle window, UI_NavActionList *nav_act
   }
   
   //- rjf: setup parent box for tooltip
-  Vec2F32 mouse = ui_state->mouse;
   UI_FixedX(mouse.x+15.f) UI_FixedY(mouse.y) UI_PrefWidth(ui_children_sum(1.f)) UI_PrefHeight(ui_children_sum(1.f))
   {
     ui_set_next_child_layout_axis(Axis2_Y);

src/ui/ui_core.h

@@ -560,7 +560,7 @@ internal UI_Box *          ui_box_from_key(UI_Key key);
 ////////////////////////////////
 //~ rjf: Top-Level Building API
 
-internal void ui_begin_build(OS_EventList *events, OS_Handle window, UI_NavActionList *nav_actions, UI_IconInfo *icon_info, F32 real_dt, F32 animation_dt);
+internal void ui_begin_build(OS_EventList *events, Vec2F32 mouse, OS_Handle window, UI_NavActionList *nav_actions, UI_IconInfo *icon_info, F32 real_dt, F32 animation_dt);
 internal void ui_end_build(void);
 internal void ui_calc_sizes_standalone__in_place_rec(UI_Box *root, Axis2 axis);
 internal void ui_calc_sizes_upwards_dependent__in_place_rec(UI_Box *root, Axis2 axis);