Persist table layouts just after changing the real used sizes and show truncated cell tooltips in the whole applications tables v2

src/main/java/kst4contest/view/TableLayoutManager.java

@@ -22,8 +22,8 @@ import java.util.OptionalDouble;
  */
 public final class TableLayoutManager {
 
-    private static final double CELL_HORIZONTAL_PADDING = 28.0;
+    private static final double CELL_HORIZONTAL_PADDING = 16.0;
-    private static final double DEFAULT_MINIMUM_WIDTH = 42.0;
+    private static final double DEFAULT_MINIMUM_WIDTH = 24.0;
 
     private TableLayoutManager() {
     }
@@ -139,7 +139,11 @@ public final class TableLayoutManager {
                     measure(String.valueOf(value.getValue()), measurement)
             );
         }
-        return clamp(requiredWidth + CELL_HORIZONTAL_PADDING, spec.minimumWidth, spec.maximumInitialWidth);
+        return calculateInitialContentWidth(
+                requiredWidth,
+                spec.minimumWidth,
+                spec.maximumInitialWidth
+        );
     }
 
     private static <S> double flexibleInitialWidth(TableView<S> table, ColumnSpec spec) {
@@ -223,6 +227,18 @@ public final class TableLayoutManager {
         return Math.max(minimum, Math.min(value, maximum));
     }
 
+    /**
+     * Calculates a compact content width. Package-private for focused sizing tests.
+     */
+    @SuppressWarnings("PMD.CommentDefaultAccessModifier")
+    static double calculateInitialContentWidth(
+            final double measuredWidth,
+            final double minimum,
+            final double maximum
+    ) {
+        return clamp(measuredWidth + CELL_HORIZONTAL_PADDING, minimum, maximum);
+    }
+
     public static final class ColumnSpec {
         private final String id;
         private final TableColumn<?, String> column;

src/test/java/kst4contest/view/TableLayoutManagerTest.java

@@ -0,0 +1,19 @@
+package kst4contest.view;
+
+import org.junit.jupiter.api.Test;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+
+class TableLayoutManagerTest {
+
+    @Test
+    void contentWidthUsesCompactPadding() {
+        assertEquals(116.0, TableLayoutManager.calculateInitialContentWidth(100.0, 24.0, 200.0));
+    }
+
+    @Test
+    void contentWidthStillHonorsMinimumAndMaximum() {
+        assertEquals(24.0, TableLayoutManager.calculateInitialContentWidth(0.0, 24.0, 200.0));
+        assertEquals(200.0, TableLayoutManager.calculateInitialContentWidth(250.0, 24.0, 200.0));
+    }
+}