2 files changed, 38 insertions, 23 deletions
diff --git a/src/com.example.portfolio2/com/example/portfolio2/Controller.java b/src/com.example.portfolio2/com/example/portfolio2/Controller.java
index 66519ae..3354dcd 100644
--- a/src/com.example.portfolio2/com/example/portfolio2/Controller.java
+++ b/src/com.example.portfolio2/com/example/portfolio2/Controller.java
@@ -42,23 +42,15 @@ class Controller {
 
 	/// callback when category has been selected
 	///
+	/// @param section   section the category is tied to
 	/// @param category  selected category
-	/// @param select    activity selection object
-	/// @param area      activity listing object
+	// TODO: require a UI instead
 	void onCategorySelected(
-		final String category,
-		final ComboBox<String> select,
-		final TextArea area
+		final GUI.Section section,
+		final String category
 	) {
-
-		// clear the activity selection box
-		select.getItems().clear();
-
-		// clear text area
-		area.clear();
-
-		// fill activity box from data in store
-		select.getItems().addAll(store.selectProgram(category));
+		view.clearSelections(section);
+		view.setOptions(section,store.selectProgram(category));
 	}
 
 	/// callback when activity has been selected
diff --git a/src/com.example.portfolio2/com/example/portfolio2/Window.java b/src/com.example.portfolio2/com/example/portfolio2/Window.java
index d3e2b06..774b012 100644
--- a/src/com.example.portfolio2/com/example/portfolio2/Window.java
+++ b/src/com.example.portfolio2/com/example/portfolio2/Window.java
@@ -100,9 +100,8 @@ public final class Window extends Application {
 					"HumTek", "NatBach");
 				col.categoryCombo.setOnAction(event -> {
 					con.onCategorySelected(
-					  col.categoryCombo.getValue(),
-					  col.activitySelect,
-					  col.area);
+					  col.section,
+					  col.categoryCombo.getValue());
 				});
 			}
 			  // TODO: use the list for filling the box
@@ -118,9 +117,8 @@ public final class Window extends Application {
 					    GUI.Section.SUBJECT2.column)
 					    .categoryCombo);
 					con.onCategorySelected(
-					  col.categoryCombo.getValue(),
-					  col.activitySelect,
-					  col.area);
+					  col.section,
+					  col.categoryCombo.getValue());
 				});
 			}
 			  case GUI.Section.SUBJECT2 -> {
@@ -136,9 +134,8 @@ public final class Window extends Application {
 					    GUI.Section.SUBJECT1.column)
 					    .categoryCombo);
 					con.onCategorySelected(
-					  col.categoryCombo.getValue(),
-					  col.activitySelect,
-					  col.area);
+					  col.section,
+					  col.categoryCombo.getValue());
 				});
 			}
 			  case GUI.Section.ELECTIVE -> {
@@ -219,4 +216,30 @@ public final class Window extends Application {
 				ectsLabel);
 		}
 	}
+
+	/// populate activities for a category
+	///
+	/// @param section     structural section to operate on
+	/// @param activities  activities to apply as string
+	public void setOptions(
+		final GUI.Section section, final List<String> activities
+	) {
+
+		// clear the activity selection box
+		columns.get(section.column).activitySelect
+			.getItems().clear();
+
+		// fill activity box from data in store
+		columns.get(section.column).activitySelect
+			.getItems().addAll(activities);
+	}
+
+	/// remove selections from a category
+	///
+	/// @param section     structural section to operate on
+	public void clearSelections(final GUI.Section section) {
+
+		// clear text area
+		columns.get(section.column).area.clear();
+	}
 }