vadin-app: add a field validator

1 files changed, 3 insertions, 0 deletions

diff --git a/vaadin-app/src/ch/asynk/helloworld/HelloWorldApp.java b/vaadin-app/src/ch/asynk/helloworld/HelloWorldApp.java
index cb9a029..c516e55 100644
--- a/vaadin-app/src/ch/asynk/helloworld/HelloWorldApp.java
+++ b/vaadin-app/src/ch/asynk/helloworld/HelloWorldApp.java
@@ -7,6 +7,7 @@ import com.vaadin.terminal.UserError;
 import com.vaadin.data.Property;
 import com.vaadin.data.Property.ValueChangeEvent;
 import com.vaadin.data.util.ObjectProperty;
+import com.vaadin.data.validator.DoubleValidator;
 import com.vaadin.ui.FormLayout;
 import com.vaadin.ui.VerticalLayout;
 import com.vaadin.ui.Window;
@@ -37,6 +38,8 @@ class DataMappingLayout extends FormLayout {
         final ObjectProperty<Double> property = new ObjectProperty<Double>(trouble);
         final TextField tf2 = new TextField("ObjectProperty", property);
         tf2.setImmediate(true);
+        tf2.addValidator( new DoubleValidator("It should be a double") );
+        //tf2.setValidationVisible(false);    // nothing will happen
         addComponent(tf2);
         final Label lb2 = new Label(property);
         lb2.setCaption("The Value");