use correct animation duration

added materialAnimation object

gwt-material/src/main/java/gwt/material/design/client/ui/animate/MaterialAnimation.java

@@ -0,0 +1,62 @@
+package gwt.material.design.client.ui.animate;
+
+/*
+ * #%L
+ * GwtMaterial
+ * %%
+ * Copyright (C) 2015 GwtMaterialDesign
+ * %%
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ * 
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ * #L%
+ */
+
+import com.google.gwt.user.client.ui.Widget;
+
+/**
+ * Stateful object holding animation details.
+ * Default behaviour is a bounce transition for 800ms.
+ */
+public class MaterialAnimation {
+
+    private Transition transition = Transition.BOUNCE;
+    private int delayMillis = 0;
+    private int durationMillis = 800;
+
+    public MaterialAnimation() {
+    }
+
+    public MaterialAnimation transition(Transition transition) {
+        this.transition = transition;
+        return this;
+    }
+
+    public MaterialAnimation delayMillis(int delayMillis) {
+        this.delayMillis = delayMillis;
+        return this;
+    }
+
+
+    public MaterialAnimation durationMillis(int durationMillis) {
+        this.durationMillis = durationMillis;
+        return this;
+    }
+
+    public void animate(Widget w) {
+        animate(w,null);
+    }
+
+    public void animate(Widget w,Runnable callback) {
+        MaterialAnimator.animate(transition, w, delayMillis, durationMillis, callback);
+    }
+
+}

gwt-material/src/main/java/gwt/material/design/client/ui/animate/MaterialAnimator.java

@@ -47,6 +47,8 @@ public static void animate(final Transition transition, final Widget w, int dela
     public static void animate(final Transition transition, final Widget w, int delayMillis, final int durationMillis, final Runnable callback) {
         final String name = String.valueOf(DOM.createUniqueId());
         w.getElement().setId(name);
+        w.getElement().getStyle().setProperty("WebkitAnimationDuration",durationMillis+"ms");
+        w.getElement().getStyle().setProperty("animationDuration",durationMillis+"ms");
         switch (transition) {
             case SHOW_STAGGERED_LIST:
                 if(w instanceof UnorderedList) {