Combobox Addins updates.

Author: kevin-i3

src/main/java/gwt/material/design/addins/client/combobox/MaterialComboBox.java

@@ -122,6 +122,7 @@ public class MaterialComboBox<T> extends AbstractValueWidget<List<T>> implements
     protected List<T> values = new ArrayList<>();
     private Label label = new Label();
     private MaterialLabel errorLabel = new MaterialLabel();
+    private MaterialLabel helperText = new MaterialLabel();
     protected MaterialWidget listbox = new MaterialWidget(Document.get().createSelectElement());
     private KeyFactory<T, String> keyFactory = new AllowBlankKeyFactory<>();
     private JsComboBoxOptions options = JsComboBoxOptions.create();
@@ -150,6 +151,8 @@ protected void onLoad() {
         addWidget(listbox);
         addWidget(label);
         addWidget(errorLabel);
+        helperText.addStyleName("help-description");
+
         errorLabel.setMarginTop(8);
         listbox.setGwtDisplay(Style.Display.BLOCK);
 
@@ -341,7 +344,7 @@ public void clear() {
         final Iterator<Widget> it = iterator();
         while (it.hasNext()) {
             final Widget widget = it.next();
-            if (widget != label && widget != errorLabel && widget != listbox) {
+            if (widget != label && widget != errorLabel && widget != listbox && widget != helperText) {
                 it.remove();
             }
         }
@@ -1381,4 +1384,10 @@ public AsyncWidgetMixin<MaterialComboBox, List<T>> getAsyncWidgetMixin() {
         }
         return asyncWidgetMixin;
     }
+
+    @Override
+    public void setHelperText(String helperText) {
+        this.helperText.setText(helperText);
+        addWidget(this.helperText);
+    }
 }

src/main/java/gwt/material/design/addins/client/inputmask/base/DateInputParser.java

@@ -49,29 +49,33 @@ public void setValue(String format, Date value) {
     }
 
     public boolean validate(String format) {
-        if (valuebox.getText() != null && !valuebox.getText().isEmpty()
-            && valuebox.getMask() != null && format != null) {
-            format = format.toLowerCase();
-            String dateString = valuebox.getValueWithMask();
-            String month = dateString.substring(format.indexOf("m"), format.indexOf("m") + 2);
-            String day = dateString.substring(format.indexOf("d"), format.indexOf("d") + 2);
-            String year = dateString.substring(format.indexOf("y"), format.lastIndexOf("y") + 1);
-
-            boolean validLeapYear = validateLeapYear(day, month, Integer.parseInt(year));
-            if (!validLeapYear) {
-                valuebox.setErrorText("Not a valid date");
+        try {
+            if (valuebox.getText() != null && !valuebox.getText().isEmpty()
+                && valuebox.getMask() != null && format != null) {
+                format = format.toLowerCase();
+                String dateString = valuebox.getValueWithMask();
+                String month = dateString.substring(format.indexOf("m"), format.indexOf("m") + 2);
+                String day = dateString.substring(format.indexOf("d"), format.indexOf("d") + 2);
+                String year = dateString.substring(format.indexOf("y"), format.lastIndexOf("y") + 1);
+
+                boolean validLeapYear = validateLeapYear(day, month, Integer.parseInt(year));
+                if (!validLeapYear) {
+                    valuebox.setErrorText("Not a valid date");
+                }
+
+                boolean valid = validate(month, getMonthRegex(), getMothDoesNotMatchError())
+                    && validate(day, getDayRegex(), getDayDoesNotMatchError())
+                    && validate(year, getYearRegex(), getYearDoesNotMatchError())
+                    && validLeapYear;
+
+                if (valid) {
+                    valuebox.clearStatusText();
+                }
+
+                return valid;
             }
-
-            boolean valid = validate(month, getMonthRegex(), getMothDoesNotMatchError())
-                && validate(day, getDayRegex(), getDayDoesNotMatchError())
-                && validate(year, getYearRegex(), getYearDoesNotMatchError())
-                && validLeapYear;
-
-            if (valid) {
-                valuebox.clearStatusText();
-            }
-
-            return valid;
+        } catch (Exception e) {
+            valuebox.setErrorText("Not a valid date");
         }
         return false;
     }