Fixed tiling bug and multi map bug

src/dpg_map/interaction.py

@@ -4,13 +4,17 @@ from __future__ import annotations
 
 from dataclasses import dataclass
 from math import isfinite
+from threading import RLock
 from typing import Any
 
 from .commands import CommandKind, MapCommand
 from .projection import latlon_to_world, screen_to_world, world_to_latlon
 from .sizing import effective_draw_size
 from .state import DirtyFlags, MapState, mark_dirty
-from .types import LatLon, Point
+from .types import LatLon, Point, Tag
+
+_drag_owner_lock = RLock()
+_drag_owner_map: Tag | None = None
 
 
 @dataclass(frozen=True, slots=True)
@@ -152,6 +156,12 @@ def handle_mouse_down(state: MapState, mouse_pos: tuple[float, float], hit_rect:
             state.interaction.active_drag = False
             state.interaction.last_mouse_position = None
             return
+    with _drag_owner_lock:
+        global _drag_owner_map
+        if _drag_owner_map is not None and _drag_owner_map != state.tag:
+            return
+        _drag_owner_map = state.tag
+    with state.lock:
         state.interaction.active_drag = True
         state.interaction.last_mouse_position = mouse_pos
 
@@ -159,6 +169,9 @@ def handle_mouse_down(state: MapState, mouse_pos: tuple[float, float], hit_rect:
 def handle_mouse_drag(state: MapState, mouse_pos: tuple[float, float]) -> None:
     """Update center from a mouse drag event."""
 
+    with _drag_owner_lock:
+        if _drag_owner_map != state.tag:
+            return
     with state.lock:
         if not state.interaction.active_drag:
             return
@@ -172,6 +185,10 @@ def handle_mouse_drag(state: MapState, mouse_pos: tuple[float, float]) -> None:
 def handle_mouse_release(state: MapState) -> None:
     """End any active drag."""
 
+    with _drag_owner_lock:
+        global _drag_owner_map
+        if _drag_owner_map == state.tag:
+            _drag_owner_map = None
     with state.lock:
         state.interaction.active_drag = False
         state.interaction.last_mouse_position = None
@@ -186,6 +203,9 @@ def handle_mouse_wheel(
 ) -> None:
     """Apply wheel zoom when the cursor is over the concrete map rectangle."""
 
+    with state.lock:
+        if not state.is_visible:
+            return
     if not hit_rect.contains(mouse_pos[0], mouse_pos[1]):
         return
     zoom_state_at_screen_point(
@@ -202,6 +222,7 @@ def update_drag_from_button_state(
     mouse_pos: tuple[float, float],
     hit_rect: HitRect,
     is_down: bool,
+    can_start: bool = True,
 ) -> None:
     """Poll left-button state and keep drag interaction moving."""
 
@@ -217,6 +238,9 @@ def update_drag_from_button_state(
         handle_mouse_drag(state, mouse_pos)
         return
 
+    if not can_start:
+        return
+
     if hit_rect.contains(mouse_pos[0], mouse_pos[1]):
         handle_mouse_down(state, mouse_pos, hit_rect)