com.google.gwt.sample.showcase.client.content.widgets.CwDatePicker.java Source code

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Here is the source code for com.google.gwt.sample.showcase.client.content.widgets.CwDatePicker.java

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/*
 * Copyright 2008 Google Inc.
 *
 * 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.google.gwt.sample.showcase.client.content.widgets;

import com.google.gwt.core.client.GWT;
import com.google.gwt.core.client.RunAsyncCallback;
import com.google.gwt.event.logical.shared.ValueChangeEvent;
import com.google.gwt.event.logical.shared.ValueChangeHandler;
import com.google.gwt.i18n.client.Constants;
import com.google.gwt.i18n.client.DateTimeFormat;
import com.google.gwt.sample.showcase.client.ContentWidget;
import com.google.gwt.sample.showcase.client.ShowcaseAnnotations.ShowcaseData;
import com.google.gwt.sample.showcase.client.ShowcaseAnnotations.ShowcaseSource;
import com.google.gwt.sample.showcase.client.ShowcaseAnnotations.ShowcaseStyle;
import com.google.gwt.user.client.rpc.AsyncCallback;
import com.google.gwt.user.client.ui.HTML;
import com.google.gwt.user.client.ui.Label;
import com.google.gwt.user.client.ui.VerticalPanel;
import com.google.gwt.user.client.ui.Widget;
import com.google.gwt.user.datepicker.client.DateBox;
import com.google.gwt.user.datepicker.client.DatePicker;

import java.util.Date;

/**
 * Example file.
 */
@ShowcaseStyle({ ".gwt-DatePicker", ".datePicker", "td.datePickerMonth", ".gwt-DateBox", ".dateBox" })
public class CwDatePicker extends ContentWidget {

    /**
     * The constants used in this Content Widget.
     */
    @ShowcaseSource
    public static interface CwConstants extends Constants {
        String cwDatePickerBoxLabel();

        String cwDatePickerDescription();

        String cwDatePickerLabel();

        String cwDatePickerName();
    }

    /**
     * An instance of the constants.
     */
    @ShowcaseData
    private final CwConstants constants;

    /**
     * Constructor.
     *
     * @param constants the constants
     */
    public CwDatePicker(CwConstants constants) {
        super(constants.cwDatePickerName(), constants.cwDatePickerDescription(), true);
        this.constants = constants;
    }

    /**
     * Initialize this example.
     */
    @SuppressWarnings("deprecation")
    @ShowcaseSource
    @Override
    public Widget onInitialize() {
        // Create a basic date picker
        DatePicker datePicker = new DatePicker();
        final Label text = new Label();

        // Set the value in the text box when the user selects a date
        datePicker.addValueChangeHandler(new ValueChangeHandler<Date>() {
            public void onValueChange(ValueChangeEvent<Date> event) {
                Date date = event.getValue();
                String dateString = DateTimeFormat.getMediumDateFormat().format(date);
                text.setText(dateString);
            }
        });

        // Set the default value
        datePicker.setValue(new Date(), true);

        // Create a DateBox
        DateTimeFormat dateFormat = DateTimeFormat.getLongDateFormat();
        DateBox dateBox = new DateBox();
        dateBox.setFormat(new DateBox.DefaultFormat(dateFormat));

        // Combine the widgets into a panel and return them
        VerticalPanel vPanel = new VerticalPanel();
        vPanel.add(new HTML(constants.cwDatePickerLabel()));
        vPanel.add(text);
        vPanel.add(datePicker);
        vPanel.add(new HTML(constants.cwDatePickerBoxLabel()));
        vPanel.add(dateBox);
        return vPanel;
    }

    @Override
    protected void asyncOnInitialize(final AsyncCallback<Widget> callback) {
        GWT.runAsync(CwDatePicker.class, new RunAsyncCallback() {

            public void onFailure(Throwable caught) {
                callback.onFailure(caught);
            }

            public void onSuccess() {
                callback.onSuccess(onInitialize());
            }
        });
    }
}