--- a/flys-client/ChangeLog	Wed Jul 18 12:34:05 2012 +0000
+++ b/flys-client/ChangeLog	Wed Jul 18 12:38:04 2012 +0000
@@ -1,3 +1,8 @@
+2012-07-18	Felix Wolfsteller	<felix.wolfsteller@intevation.de>
+
+	* src/main/java/de/intevation/flys/client/client/ui/StyleEditorWindow.java:
+	  Improve validation.
+
 2012-07-18	Felix Wolfsteller	<felix.wolfsteller@intevation.de>
 
 	* src/main/java/de/intevation/flys/client/client/ui/chart/ChartPropertiesEditor.java,

--- a/flys-client/src/main/java/de/intevation/flys/client/client/ui/StyleEditorWindow.java	Wed Jul 18 12:34:05 2012 +0000
+++ b/flys-client/src/main/java/de/intevation/flys/client/client/ui/StyleEditorWindow.java	Wed Jul 18 12:38:04 2012 +0000
@@ -23,6 +23,7 @@
 import com.smartgwt.client.widgets.form.fields.events.ChangedHandler;
 import com.smartgwt.client.widgets.layout.HLayout;
 import com.smartgwt.client.widgets.layout.VLayout;
+import com.smartgwt.client.widgets.form.validator.IsFloatValidator;
 
 import de.intevation.flys.client.client.Config;
 import de.intevation.flys.client.client.FLYSConstants;
@@ -70,7 +71,11 @@
     /** Main layout. */
     protected VLayout layout;
 
+    /** The form that contains all the input widgets. */
+    DynamicForm df;
+
     protected VLayout properties;
+
     protected Canvas container;
 
     protected Map<String, Style> styleGroups;
@@ -87,6 +92,7 @@
     protected ThemeListingServiceAsync themeListingService =
         GWT.create(ThemeListingService.class);
 
+
     /**
      * Setup editor dialog.
      * @param collection The collection the current theme belongs to.
@@ -206,7 +212,11 @@
         accept.addClickHandler(new ClickHandler() {
             @Override
             public void onClick(ClickEvent e) {
-                saveStyle();
+                // TODO Fix this, for whatever reason it doesnt work
+                // (always valid).
+                if (!df.hasErrors() && df.validate()) {
+                    saveStyle();
+                }
             }
         });
 
@@ -346,7 +356,7 @@
         String type,
         String value)
     {
-        DynamicForm df = new DynamicForm();
+        df = new DynamicForm();
         df.setColWidths("40%", "60%");
 
         FormItem f;
@@ -423,7 +433,12 @@
             f = c;
         }
         else if (type.equals("double")) {
-            f = new FormItem(MSG.getString(name));
+            f = new FormItem(name);
+            IsFloatValidator fpv = new IsFloatValidator();
+
+            f.setValidators(fpv);
+            f.setValidateOnChange(true);
+            f.setTitle(MSG.getString(name));
             f.addBlurHandler(new BlurHandler() {
                 public void onBlur(BlurEvent e) {
                      DoubleValidator validator = new DoubleValidator();