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+/*
+ * Copyright 2000-2014 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;
+
+/**
+ * Component with layout measuring hint. Used to improve granularity of control
+ * over child component measurements.
+ *
+ * @since 7.6
+ * @author Vaadin Ltd
+ */
+public interface HasChildMeasurementHint extends HasComponents {
+
+ /**
+ * Specifies how you would like child components measurements to be handled.
+ * Since this is a hint, it can be ignored when deemed necessary.
+ */
+ public enum ChildMeasurementHint {
+
+ /**
+ * Always measure all child components (default).
+ */
+ MEASURE_ALWAYS,
+
+ /**
+ * Measure child component only if child component is a Layout or
+ * implements either ManagedLayout or ElementResizeListener.
+ */
+ MEASURE_IF_NEEDED,
+
+ /**
+ * Never measure child components. This can improve rendering speed of
+ * components with lots of children (e.g. Table), but can cause some
+ * child components to be rendered incorrectly (e.g. ComboBox).
+ */
+ MEASURE_NEVER
+
+ }
+
+ /**
+ * Sets desired child size measurement hint.
+ *
+ * @param hint
+ * desired hint. A value of null will reset value back to the
+ * default (MEASURE_ALWAYS)
+ */
+ void setChildMeasurementHint(ChildMeasurementHint hint);
+
+ /**
+ * Returns the current child size measurement hint.
+ *
+ * @return a child measurement hint value
+ */
+ ChildMeasurementHint getChildMeasurementHint();
+
+}