Float out the bar a little bit if there are no windows, or multiple windows. Make single windows always fullscreen with no margins. Make bar transparent except when hovered over.

kuro/utils/bar.py

@@ -0,0 +1,48 @@
+from libqtile import bar
+from libqtile.widget.groupbox import GroupBox
+from libqtile.log_utils import logger
+
+
+class KuroBar(bar.Bar):
+    defaults = [
+        ("background", "#000000", "Background colour."),
+        ("background_normal", "#000000", "Background colour normally."),
+        ("background_hover", "#000000", "Background colour on hover."),
+        ("opacity", 1, "Bar window opacity."),
+        ("margin", 0, "Space around bar as int or list of ints [N E S W]."),
+        ("border_color", "#000000", "Border colour as str or list of str [N E S W]"),
+        ("border_width", 0, "Width of border as int of list of ints [N E S W]"),
+        (
+            "reserve",
+            True,
+            "Reserve screen space (when set to 'False', bar will be drawn above windows).",
+        ),
+    ]
+
+    def process_pointer_enter(self, x: int, y: int) -> None:
+        super().process_pointer_enter(x=x, y=y)
+        self.background = self.background_hover
+        # GroupBox Widget background color
+        for widget in self.widgets:
+            if isinstance(widget, GroupBox):
+                if len(widget.highlight_color) in [6, 7]:
+                    widget.highlight_color = widget.highlight_color + "FF"
+                else:
+                    widget.highlight_color = widget.highlight_color[:-2] + "FF"
+                logger.warning(f"Highlight: {widget.highlight_color}")
+        self.drawer.clear(self.background)
+        self.draw()
+
+    def process_pointer_leave(self, x: int, y: int) -> None:
+        super().process_pointer_leave(x=x, y=y)
+        self.background = self.background_normal
+        # GroupBox Widget background color
+        for widget in self.widgets:
+            if isinstance(widget, GroupBox):
+                if len(widget.highlight_color) in [6, 7]:
+                    widget.highlight_color = widget.highlight_color + "88"
+                else:
+                    widget.highlight_color = widget.highlight_color[:-2] + "88"
+                logger.warning(f"Highlight: {widget.highlight_color}")
+        self.drawer.clear(self.background)
+        self.draw()