Z layer management

libqtile/backend/base/__init__.py

@@ -1,5 +1,6 @@
 from libqtile.backend.base.core import Core  # noqa: F401
 from libqtile.backend.base.drawer import Drawer  # noqa: F401
+from libqtile.backend.base.stacking import LayerGroup  # noqa: F401
 from libqtile.backend.base.window import (  # noqa: F401
     FloatStates,
     Internal,

libqtile/backend/base/stacking.py

@@ -0,0 +1,40 @@
+# Copyright (c) 2025 elParaguayo
+#
+# Permission is hereby granted, free of charge, to any person obtaining a copy
+# of this software and associated documentation files (the "Software"), to deal
+# in the Software without restriction, including without limitation the rights
+# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+# copies of the Software, and to permit persons to whom the Software is
+# furnished to do so, subject to the following conditions:
+#
+# The above copyright notice and this permission notice shall be included in
+# all copies or substantial portions of the Software.
+#
+# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+# SOFTWARE.
+from enum import IntEnum
+
+
+class LayerGroup(IntEnum):
+    """
+    Helper object to specify stacking layers. `LayerGroup` is backend-agnostic,
+    so backends will need to map behaviour accordingly. However, a common object
+    allows us have more common code across backends.
+    """
+
+    BACKGROUND = 0
+    BOTTOM = 1
+    KEEP_BELOW = 2
+    LAYOUT = 3
+    KEEP_ABOVE = 4
+    MAX = 5
+    FULLSCREEN = 6
+    BRING_TO_FRONT = 7
+    TOP = 8
+    OVERLAY = 9
+    SYSTEM = 10