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- /*
- * 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;
-
- /**
- * Interface implemented by {@link HasComponents} implementors that wish to
- * dynamically be able to prevent given child components from reaching the
- * client side.
- *
- * @author Vaadin Ltd
- * @since 7.0
- *
- */
- public interface SelectiveRenderer extends HasComponents {
- /**
- * Checks if the child component should be rendered (sent to the client
- * side). This method allows hiding a child component from updates and
- * communication to and from the client. It is mostly useful for parents
- * which show only a limited number of their children at any given time and
- * want to allow updates only for the visible children (e.g. TabSheet has
- * one tab open at a time).
- * <p>
- * This method can only prevent updates from reaching the client, not force
- * child components to reach the client. If the child is set to visible,
- * returning false will prevent the child from being sent to the client. If
- * a child is set to invisible, this method has no effect.
- * </p>
- *
- * @param childComponent
- * The child component to check
- * @return true if the child component may be sent to the client, false
- * otherwise
- */
- public boolean isRendered(Component childComponent);
-
- }
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