Update ConstraintPreferencePage.

Change-Id: I2a4f44f22c7649a339b0fea67ed7b1355434d088

plugins/org.polarsys.chess.core/src/org/polarsys/chess/core/internal/preferences/ConstraintPreferencePage.java

@@ -19,7 +19,6 @@ import java.util.ArrayList;
 import org.eclipse.jface.preference.BooleanFieldEditor;
 import org.eclipse.jface.preference.FieldEditorPreferencePage;
 import org.eclipse.jface.preference.IPreferenceStore;
-import org.eclipse.jface.preference.StringFieldEditor;
 import org.eclipse.ui.IWorkbench;
 import org.eclipse.ui.IWorkbenchPreferencePage;
 import org.polarsys.chess.core.constraint.ConstraintList;
@@ -39,12 +38,11 @@ import org.polarsys.chess.core.Activator;
  * preferences can be accessed directly via the preference store.
  */
 
-public class ConstraintPreferencePage extends FieldEditorPreferencePage
-		implements IWorkbenchPreferencePage {
+public class ConstraintPreferencePage extends FieldEditorPreferencePage implements IWorkbenchPreferencePage {
 
 	/** The i. */
 	private static int i = 0;
-	
+
 	/**
 	 * Instantiates a new constraint preference page.
 	 */
@@ -62,52 +60,64 @@ public class ConstraintPreferencePage extends FieldEditorPreferencePage
 	 */
 	public void createFieldEditors() {
 		ArrayList<FilterableConstraint> list = ConstraintList.getList();
-		if (list.isEmpty()) {
-			addField(new LabelField("Open the CHESS editor to load the constraints!", getFieldEditorParent()));
-		} else {
+		if (!list.isEmpty()) {
+			// addField(new LabelField("Open the CHESS editor to load the
+			// constraints!", getFieldEditorParent()));
+			// } else {
 			for (FilterableConstraint c : ConstraintList.getList()) {
 
 				IConstraint cc = c.getConstraint();
-				BooleanFieldEditor b = new BooleanFieldEditor(cc.getName(), cc.getMessage(), BooleanFieldEditor.SEPARATE_LABEL, getFieldEditorParent());
+				BooleanFieldEditor b = new BooleanFieldEditor(cc.getName(), cc.getMessage(),
+						BooleanFieldEditor.SEPARATE_LABEL, getFieldEditorParent());
 				addField(b);
 			}
-			
-			BooleanFieldEditor b1 = new BooleanFieldEditor(PreferenceProperties.DIAGRAM_IN_VIEW, "Diagrams must be created inside the proper CHESS views", BooleanFieldEditor.SEPARATE_LABEL, getFieldEditorParent());
-			addField(b1);
-			BooleanFieldEditor b2 = new BooleanFieldEditor(PreferenceProperties.PALETTES_IN_VIEW, "Hide Diagram Palettes according to the current CHESS views", BooleanFieldEditor.SEPARATE_LABEL, getFieldEditorParent());
-			addField(b2);
 		}
+		BooleanFieldEditor b1 = new BooleanFieldEditor(PreferenceProperties.DIAGRAM_IN_VIEW,
+				"Diagrams must be created inside the proper CHESS views", BooleanFieldEditor.SEPARATE_LABEL,
+				getFieldEditorParent());
+		addField(b1);
+		BooleanFieldEditor b2 = new BooleanFieldEditor(PreferenceProperties.PALETTES_IN_VIEW,
+				"Hide Diagram Palettes according to the current CHESS views", BooleanFieldEditor.SEPARATE_LABEL,
+				getFieldEditorParent());
+		addField(b2);
 	}
 
-	/* (non-Javadoc)
+	/*
+	 * (non-Javadoc)
+	 * 
 	 * @see org.eclipse.jface.preference.FieldEditorPreferencePage#performOk()
 	 */
-	//Actively set the filter values on the ConstraintList
+	// Actively set the filter values on the ConstraintList
 	@Override
 	public boolean performOk() {
 		super.performOk();
 		IPreferenceStore store = Activator.getDefault().getPreferenceStore();
 		for (FilterableConstraint c : ConstraintList.getList()) {
-//			if (!(c instanceof ParsableConstraint))
-//				continue;
+			// if (!(c instanceof ParsableConstraint))
+			// continue;
 			IConstraint cc = c.getConstraint();
-			
+
 			c.setActive(store.getBoolean(cc.getName()));
 		}
 		return true;
 	}
-	
-	/* (non-Javadoc)
-	 * @see org.eclipse.ui.IWorkbenchPreferencePage#init(org.eclipse.ui.IWorkbench)
+
+	/*
+	 * (non-Javadoc)
+	 * 
+	 * @see
+	 * org.eclipse.ui.IWorkbenchPreferencePage#init(org.eclipse.ui.IWorkbench)
 	 */
 	@Override
 	public void init(IWorkbench workbench) {
 		setPreferenceStore(Activator.getDefault().getPreferenceStore());
-        setDescription("CHESS Core Constraints");
-        
+		setDescription("CHESS Core Constraints");
+
 	}
-	
-	/* (non-Javadoc)
+
+	/*
+	 * (non-Javadoc)
+	 * 
 	 * @see org.eclipse.jface.preference.PreferencePage#doGetPreferenceStore()
 	 */
 	@Override