feat: adjust cardinality bar sizing for better spacing

Author: edmundmiller

altair_upset/components.py

@@ -165,7 +165,7 @@ def create_vertical_set_bars(
             y=alt.Y(
                 "sum(count):Q",
                 axis=alt.Axis(grid=False, tickCount=3, domain=False),
-                scale=alt.Scale(zero=True),
+                scale=alt.Scale(zero=True, padding=0, nice=False),
                 title="Set Size",
             )
         )
@@ -253,6 +253,7 @@ def create_horizontal_cardinality_bar(
         x=alt.X(
             "max(count):Q",
             axis=alt.Axis(grid=False, tickCount=3, orient=x_axis_orient),
+            scale=alt.Scale(zero=True, padding=0, nice=False),
             title="Intersection Size",
         ),
         color=brush_color,

altair_upset/config.py

@@ -1,5 +1,3 @@
-
-
 def upsetaltair_top_level_configuration(
     base, legend_orient="top-left", legend_symbol_size=30
 ):

altair_upset/upset.py

@@ -562,7 +562,7 @@ def UpSetVertical(
     if cardinality_bar_width is None:
         cardinality_bar_width = int(width * 0.15)  # 15% of total width
     set_bar_height = height * height_ratio
-    matrix_height = height - set_bar_height
+    matrix_height = height - set_bar_height  # Use full available height
     matrix_width = width - cardinality_bar_width
 
     # Setup styles
@@ -578,8 +578,7 @@ def UpSetVertical(
 
     # Automatic bar size for cardinality bars
     num_intersections = max(1, len(data["intersection_id"].unique().tolist()))
-    # Use 80% of available space per intersection for better visibility
-    cardinality_bar_size = min(50, (matrix_height / num_intersections) * 0.8)
+    cardinality_bar_size = min(30, (matrix_height / num_intersections) - 5)
 
     # Tooltip configuration for cardinality bars
     tooltip = [

tests/__snapshots__/test_advanced_features/test_upset_vertical_snapshot[vega_spec].json

@@ -122,6 +122,11 @@
                     "tickCount": 3
                   },
                   "field": "count",
+                  "scale": {
+                    "nice": false,
+                    "padding": 0,
+                    "zero": true
+                  },
                   "title": "Intersection Size",
                   "type": "quantitative"
                 },
@@ -284,6 +289,11 @@
                     "tickCount": 3
                   },
                   "field": "count",
+                  "scale": {
+                    "nice": false,
+                    "padding": 0,
+                    "zero": true
+                  },
                   "title": "Intersection Size",
                   "type": "quantitative"
                 },
@@ -305,7 +315,7 @@
               },
               "mark": {
                 "color": "#3A3A3A",
-                "size": 36.0,
+                "size": 30,
                 "type": "bar"
               },
               "name": "view_1",
@@ -1192,6 +1202,8 @@
               },
               "field": "count",
               "scale": {
+                "nice": false,
+                "padding": 0,
                 "zero": true
               },
               "title": "Set Size",