burrito.client.crud.widgets.StringListWidget.java Source code

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Here is the source code for burrito.client.crud.widgets.StringListWidget.java

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/**
 * Copyright 2011 Henric Persson (henric.persson@gmail.com)
 * 
 * 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 burrito.client.crud.widgets;

import java.util.ArrayList;
import java.util.List;

import burrito.client.crud.labels.CrudMessages;

import com.google.gwt.core.client.GWT;
import com.google.gwt.event.dom.client.ClickEvent;
import com.google.gwt.event.dom.client.ClickHandler;
import com.google.gwt.user.client.ui.Button;
import com.google.gwt.user.client.ui.Composite;
import com.google.gwt.user.client.ui.FlowPanel;
import com.google.gwt.user.client.ui.HorizontalPanel;
import com.google.gwt.user.client.ui.TextBox;
import com.google.gwt.user.client.ui.VerticalPanel;

public class StringListWidget extends Composite {

    private FlowPanel tagsPanel = new FlowPanel();
    private TextBox tagInput = new TextBox();
    private Button addButton = new Button(labels.add());
    private VerticalPanel wrapper = new VerticalPanel();
    private static CrudMessages labels = GWT.create(CrudMessages.class);

    public StringListWidget(List<String> strings) {
        tagsPanel.setStyleName("k5-StringListWidget-TagPanel");
        wrapper.add(tagsPanel);
        HorizontalPanel inputWrapper = new HorizontalPanel();
        inputWrapper.add(tagInput);
        inputWrapper.add(addButton);
        wrapper.add(inputWrapper);
        addButton.addStyleName("k5-StringListWidget-AddButton");
        addButton.addClickHandler(new ClickHandler() {

            public void onClick(ClickEvent event) {
                addCurrentTag();
            }
        });

        load(strings);
        initWidget(wrapper);
        addStyleName("k5-StringListWidget");
    }

    private void load(List<String> values) {
        if (values == null) {
            return;
        }
        for (String value : values) {
            addTag(value);
        }
    }

    private void addTag(String tagText) {
        final Button tag = new Button(tagText.trim());
        tag.setTitle(labels.clickToDeleteTag());
        tag.addClickHandler(new ClickHandler() {

            public void onClick(ClickEvent event) {
                deleteTag(tag);
            }
        });
        tag.setStyleName("k5-StringListWidget-TagPanel-TagButton");
        tagsPanel.add(tag);
    }

    protected void addCurrentTag() {
        addTag(tagInput.getText());
    }

    private void deleteTag(Button tag) {
        tagsPanel.remove(tag);
    }

    public List<String> getValue() {
        List<String> values = new ArrayList<String>();
        for (int i = 0; i < tagsPanel.getWidgetCount(); i++) {
            Button b = (Button) tagsPanel.getWidget(i);
            values.add(b.getText());
        }
        return values;
    }

    public void setValue(List<String> values) {
        if (values == null) {
            return;
        }
        for (String tag : values) {
            if (tag != null && !tag.isEmpty()) {
                addTag(tag);
            }
        }

    }

}