org.rstudio.studio.client.rmarkdown.ui.RmdChoiceOption.java Source code

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Here is the source code for org.rstudio.studio.client.rmarkdown.ui.RmdChoiceOption.java

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/*
 * RmdChoiceOption.java
 *
 * Copyright (C) 2009-14 by RStudio, Inc.
 *
 * Unless you have received this program directly from RStudio pursuant
 * to the terms of a commercial license agreement with RStudio, then
 * this program is licensed to you under the terms of version 3 of the
 * GNU Affero General Public License. This program is distributed WITHOUT
 * ANY EXPRESS OR IMPLIED WARRANTY, INCLUDING THOSE OF NON-INFRINGEMENT,
 * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. Please refer to the
 * AGPL (http://www.gnu.org/licenses/agpl-3.0.txt) for more details.
 *
 */
package org.rstudio.studio.client.rmarkdown.ui;

import org.rstudio.studio.client.rmarkdown.model.RmdTemplateFormatOption;

import com.google.gwt.core.client.JsArrayString;
import com.google.gwt.user.client.ui.HTMLPanel;
import com.google.gwt.user.client.ui.ListBox;

public class RmdChoiceOption extends RmdNullableOption {
    public RmdChoiceOption(RmdTemplateFormatOption option, String initialValue) {
        super(option, initialValue);
        defaultValue_ = option.getDefaultValue();

        HTMLPanel panel = new HTMLPanel("");
        panel.add(getOptionLabelWidget());
        choices_ = new ListBox();

        JsArrayString choiceList = option.getChoiceList();
        int selectedIdx = 0;
        for (int i = 0; i < choiceList.length(); i++) {
            choices_.addItem(choiceList.get(i));
            if (choiceList.get(i).equals(initialValue)) {
                selectedIdx = i;
            }
        }
        choices_.setSelectedIndex(selectedIdx);
        panel.add(choices_);

        updateNull();
        initWidget(panel);
    }

    @Override
    public boolean valueIsDefault() {
        return defaultValue_ == getValue();
    }

    @Override
    public String getValue() {
        if (valueIsNull()) {
            return null;
        }
        return choices_.getValue(choices_.getSelectedIndex());
    }

    @Override
    public void updateNull() {
        choices_.setEnabled(!valueIsNull());
    }

    private final String defaultValue_;
    private ListBox choices_;
}