/**
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You 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 org.apache.isis.viewer.wicket.ui.components.widgets;
import com.vaynberg.wicket.select2.Select2Choice;
import org.apache.wicket.behavior.AttributeAppender;
import org.apache.wicket.model.IModel;
import org.apache.isis.viewer.wicket.model.mementos.ObjectAdapterMemento;
import org.apache.isis.viewer.wicket.model.models.ScalarModel;
public final class Select2ChoiceUtil {
private Select2ChoiceUtil(){}
// a guesstimate to convert a single character into 'em' units
private static final double CHAR_TO_EM_MULTIPLIER = 0.8;
// a further fudge, add some additional characters prior to multiplication.
private static final int ADDITIONAL_CHARS = 3;
public static Select2Choice<ObjectAdapterMemento> newSelect2Choice(String id, final IModel<ObjectAdapterMemento> modelObject, ScalarModel scalarModel) {
Select2Choice<ObjectAdapterMemento> select2Choice = new Select2Choice<ObjectAdapterMemento>(id, modelObject);
int typicalLength = scalarModel.getTypicalLength();
select2Choice.add(new AttributeAppender("style", asCssStyleWidth(typicalLength)));
select2Choice.setRequired(scalarModel.isRequired());
return select2Choice;
}
private static String asCssStyleWidth(int numChars) {
return "width: " + ((numChars+ADDITIONAL_CHARS) * CHAR_TO_EM_MULTIPLIER) + "em;";
}
}