1 files changed, 25 insertions, 0 deletions
diff --git a/rba.tool.editor/src/rba/tool/editor/validation/validators/VerticalLayoutValidator.xtend b/rba.tool.editor/src/rba/tool/editor/validation/validators/VerticalLayoutValidator.xtend
new file mode 100644
index 0000000..47efaf2
--- /dev/null
+++ b/rba.tool.editor/src/rba/tool/editor/validation/validators/VerticalLayoutValidator.xtend
@@ -0,0 +1,25 @@
+package rba.tool.editor.validation.validators
+
+import org.eclipse.xtext.validation.Check
+import org.eclipse.xtext.validation.EValidatorRegistrar
+import rba.tool.editor.messages.Messages
+import rba.tool.editor.validation.AbstractRBAModelValidator
+import rba.view.RBAViewPackage
+import rba.view.VerticalLayout
+
+class VerticalLayoutValidator extends AbstractRBAModelValidator {
+
+	private String VERTICAL_LAYOUT_CHECK = Messages.VERTICAL_LAYOUT_CHECK;
+
+	override register(EValidatorRegistrar registrar) {
+		// not needed for classes used as ComposedCheck
+	}
+
+	@Check(NORMAL)
+	def checkVerticalLayout(VerticalLayout verticalLayout) {
+		if (verticalLayout.subarea.size == 0) {
+			warning(VERTICAL_LAYOUT_CHECK, RBAViewPackage.Literals.ALIGNED_LAYOUT__SUBAREA);
+			return;
+		}
+	}
+}