Reimplement basic Grid renderers

Change-Id: Ic855143d23cc7735d00130806df45b6579ba0d5c

1 files changed, 45 insertions, 0 deletions

diff --git a/server/src/main/java/com/vaadin/ui/renderers/ProgressBarRenderer.java b/server/src/main/java/com/vaadin/ui/renderers/ProgressBarRenderer.java
new file mode 100644
index 0000000000..7d05959484
--- /dev/null
+++ b/server/src/main/java/com/vaadin/ui/renderers/ProgressBarRenderer.java
@@ -0,0 +1,45 @@
+/*
+ * Copyright 2000-2016 Vaadin Ltd.
+ *
+ * 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.
+ */
+package com.vaadin.ui.renderers;
+
+import elemental.json.JsonValue;
+
+/**
+ * A renderer that represents double values between 0 and 1 as a graphical
+ * progress bar.
+ *
+ * @author Vaadin Ltd
+ * @since 7.4
+ */
+public class ProgressBarRenderer extends AbstractRenderer<Double> {
+
+    /**
+     * Creates a new text renderer
+     */
+    public ProgressBarRenderer() {
+        super(Double.class, null);
+    }
+
+    @Override
+    public JsonValue encode(Double value) {
+        if (value != null) {
+            value = Math.max(Math.min(value, 1), 0);
+        } else {
+            value = 0d;
+        }
+        return super.encode(value);
+    }
+}