diff --git a/gtm2.py b/gtm2.py
index bdae00a..d636314 100755
--- a/gtm2.py
+++ b/gtm2.py
@@ -378,12 +378,14 @@ def handle_mouse_input(stdscr, state):
         _, mx, my, _, bstate = curses.getmouse()
 
         if bstate & curses.BUTTON1_PRESSED:
-            if abs(mx - state.divider_col) <= 1:
-                state.dragging_divider = True
-            else:
-                state.is_selecting = True
-                state.selection_start_coord = (mx, my)
-                state.selection_end_coord = (mx, my)
+            # Only start a new action if no action is in progress
+            if not state.dragging_divider and not state.is_selecting:
+                if abs(mx - state.divider_col) <= 1:
+                    state.dragging_divider = True
+                else:
+                    state.is_selecting = True
+                    state.selection_start_coord = (mx, my)
+                    state.selection_end_coord = (mx, my)
         
         if state.dragging_divider:
             state.update_divider(mx)