fix debug engine incorrectly using visual run state to soft halt, when ctrl thread did not necessarily report it was running; was leading to 'phantom halts'; other small fixes, dead code elimination, and begin sketching out proper cross-window drag/drop

src/os/gfx/linux/os_gfx_linux.c

@@ -448,6 +448,12 @@ os_get_modifiers(void)
   return 0;
 }
 
+internal B32
+os_key_is_down(OS_Key key)
+{
+  return 0;
+}
+
 internal Vec2F32
 os_mouse_from_window(OS_Handle handle)
 {

src/os/gfx/os_gfx.h

@@ -173,7 +173,8 @@ internal Vec2F32        os_dim_from_monitor(OS_Handle monitor);
 
 internal void           os_send_wakeup_event(void);
 internal OS_EventList   os_get_events(Arena *arena, B32 wait);
-internal OS_Modifiers  os_get_modifiers(void);
+internal OS_Modifiers   os_get_modifiers(void);
+internal B32            os_key_is_down(OS_Key key);
 internal Vec2F32        os_mouse_from_window(OS_Handle window);
 
 ////////////////////////////////

src/os/gfx/stub/os_gfx_stub.c

@@ -197,6 +197,12 @@ os_get_modifiers(void)
   return f;
 }
 
+internal B32
+os_key_is_down(OS_Key key)
+{
+  return 0;
+}
+
 internal Vec2F32
 os_mouse_from_window(OS_Handle window)
 {

src/os/gfx/win32/os_gfx_win32.c

@@ -314,6 +314,9 @@ os_w32_vkey_from_os_key(OS_Key key)
       vkey_table[OS_Key_Num7] = VK_NUMPAD7;
       vkey_table[OS_Key_Num8] = VK_NUMPAD8;
       vkey_table[OS_Key_Num9] = VK_NUMPAD9;
+      vkey_table[OS_Key_LeftMouseButton] = VK_LBUTTON;
+      vkey_table[OS_Key_MiddleMouseButton] = VK_MBUTTON;
+      vkey_table[OS_Key_RightMouseButton] = VK_RBUTTON;
     }
     result = vkey_table[key];
   }
@@ -356,10 +359,10 @@ os_w32_wnd_proc(HWND hwnd, UINT uMsg, WPARAM wParam, LPARAM lParam)
       
       case WM_SIZE:
       case WM_PAINT:
-      {
+      {
         PAINTSTRUCT ps = {0};
         BeginPaint(hwnd, &ps);
-        update();
+        update();
         EndPaint(hwnd, &ps);
       }break;
       
@@ -533,27 +536,27 @@ os_w32_wnd_proc(HWND hwnd, UINT uMsg, WPARAM wParam, LPARAM lParam)
         F32 new_dpi = (F32)(wParam & 0xffff);
         window->dpi = new_dpi;
       }break;
-      
-      //- rjf: [file drop]
-      case WM_DROPFILES:
-      {
-        HDROP drop = (HDROP)wParam;
-        POINT drop_pt = {0};
-        DragQueryPoint(drop, &drop_pt);
-        ScreenToClient(window->hwnd, &drop_pt);
-        U64 num_files_dropped = DragQueryFile(drop, 0xffffffff, 0, 0);
-        OS_Event *event = os_w32_push_event(OS_EventKind_FileDrop, window);
-        event->pos = v2f32((F32)drop_pt.x, (F32)drop_pt.y);
-        for(U64 idx = 0; idx < num_files_dropped; idx += 1)
-        {
-          U64 name_size = DragQueryFile(drop, idx, 0, 0) + 1;
-          U8 *name_ptr = push_array(os_w32_event_arena, U8, name_size);
-          DragQueryFile(drop, idx, (char *)name_ptr, name_size);
-          str8_list_push(os_w32_event_arena, &event->strings, str8(name_ptr, name_size));
-        }
-        DragFinish(drop);
-      }break;
-      
+      
+      //- rjf: [file drop]
+      case WM_DROPFILES:
+      {
+        HDROP drop = (HDROP)wParam;
+        POINT drop_pt = {0};
+        DragQueryPoint(drop, &drop_pt);
+        ScreenToClient(window->hwnd, &drop_pt);
+        U64 num_files_dropped = DragQueryFile(drop, 0xffffffff, 0, 0);
+        OS_Event *event = os_w32_push_event(OS_EventKind_FileDrop, window);
+        event->pos = v2f32((F32)drop_pt.x, (F32)drop_pt.y);
+        for(U64 idx = 0; idx < num_files_dropped; idx += 1)
+        {
+          U64 name_size = DragQueryFile(drop, idx, 0, 0) + 1;
+          U8 *name_ptr = push_array(os_w32_event_arena, U8, name_size);
+          DragQueryFile(drop, idx, (char *)name_ptr, name_size);
+          str8_list_push(os_w32_event_arena, &event->strings, str8(name_ptr, name_size));
+        }
+        DragFinish(drop);
+      }break;
+      
       //- rjf: [custom border]
       case WM_NCPAINT:
       {
@@ -1027,8 +1030,8 @@ os_window_open(Vec2F32 resolution, OS_WindowFlags flags, String8 title)
                            (int)resolution.y,
                            0, 0,
                            os_w32_gfx_state->hInstance,
-                           0);
-    DragAcceptFiles(hwnd, 1);
+                           0);
+    DragAcceptFiles(hwnd, 1);
     scratch_end(scratch);
   }
   
@@ -1412,6 +1415,18 @@ os_get_modifiers(void)
   return modifiers;
 }
 
+internal B32
+os_key_is_down(OS_Key key)
+{
+  B32 down = 0;
+  WPARAM vkey = os_w32_vkey_from_os_key(key);
+  if(GetKeyState(vkey) & 0x8000)
+  {
+    down = 1;
+  }
+  return down;
+}
+
 internal Vec2F32
 os_mouse_from_window(OS_Handle handle)
 {