Always four videos, drag over replaces video below

gridplayer/player/managers/drag_n_drop.py

@@ -19,6 +19,7 @@
 class DragNDropManager(ManagerBase):
     playlist_dropped = pyqtSignal(Path)
     videos_dropped = pyqtSignal(list)
+    close_this = pyqtSignal(str)
 
     videos_swapped = pyqtSignal()
 
@@ -185,6 +186,12 @@ def _drop_files(self, event, drop_files):
             videos = filter_video_uris(drop_files)
             self.videos_dropped.emit(videos)
 
+        if len(self._ctx.video_blocks) >= 4:
+            if (self._ctx.active_block):
+                self._swap_videos(self._ctx.active_block, self._ctx.video_blocks[-1], False)
+                self._ctx.active_block.close(True)
+                self.videos_swapped.emit()
+
         event.acceptProposedAction()
 
         return True
@@ -285,7 +292,7 @@ def _make_qdrag(self, block):
         drag.setMimeData(mime_data)
         return drag
 
-    def _swap_videos(self, src, dst):
+    def _swap_videos(self, src, dst, emit=True):
         self._log.debug(f"Swapping {src.id} with {dst.id}")
 
         if src == dst:
@@ -294,4 +301,5 @@ def _swap_videos(self, src, dst):
 
         self._ctx.video_blocks.swap(dst, src)
 
-        self.videos_swapped.emit()
+        if emit:
+            self.videos_swapped.emit()

gridplayer/player/managers/grid.py

@@ -97,7 +97,7 @@ def visible_count(self):
     @property
     def grid_dimensions(self):
         if self.visible_count <= 1:
-            return GridDimensions(1, 1)
+            return GridDimensions(2, 2)
 
         if self._grid_size == 0:
             grid_size = math.ceil(math.sqrt(self.visible_count))
@@ -111,7 +111,7 @@ def grid_dimensions(self):
         else:
             cols, rows = grid_size, grid_slices
 
-        return GridDimensions(cols, rows)
+        return GridDimensions(2, 2)
 
     @contextlib.contextmanager
     def slow_ui_operation(self):

gridplayer/player/player.py

@@ -76,6 +76,7 @@ def __init__(self, **kwargs):
                 ("video_blocks.video_count_changed", "update_active_under_mouse")
             ],
             "drag_n_drop": [
+                ("close_this", "video_blocks.close_single"),
                 ("videos_swapped", "grid.reload_video_grid"),
                 ("videos_swapped", "active_block.update_active_under_mouse"),
                 ("videos_dropped", "video_blocks.add_videos"),