/*
* 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.client;
import com.vaadin.client.ui.ManagedLayout;
import com.vaadin.client.ui.layout.ElementResizeListener;
/**
* Connector with layout measuring hint. Used to improve granularity of control
* over child component measurements.
*
* @since 7.6
* @author Vaadin Ltd
*/
public interface HasChildMeasurementHintConnector
extends HasComponentsConnector {
/**
* 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 {@link Layout}
* or implements either {@link ManagedLayout} or
* {@link 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 the child measurement hint for this component.
*
* @param hint
* the value to set
*/
void setChildMeasurementHint(ChildMeasurementHint hint);
/**
* Returns the current child measurement hint value.
*
* @return a ChildLayoutMeasureMode value
*/
ChildMeasurementHint getChildMeasurementHint();
}