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

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Here is the source code for com.google.gwt.sample.showcase.client.content.widgets.CwBasicButton.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.dom.client.ClickEvent;
import com.google.gwt.event.dom.client.ClickHandler;
import com.google.gwt.i18n.client.Constants;
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.Window;
import com.google.gwt.user.client.rpc.AsyncCallback;
import com.google.gwt.user.client.ui.Button;
import com.google.gwt.user.client.ui.HorizontalPanel;
import com.google.gwt.user.client.ui.Widget;

/**
 * Example file.
 */
@ShowcaseStyle(".gwt-Button")
public class CwBasicButton extends ContentWidget {
    /**
     * The constants used in this Content Widget.
     */
    @ShowcaseSource
    public static interface CwConstants extends Constants {
        String cwBasicButtonClickMessage();

        String cwBasicButtonDescription();

        String cwBasicButtonDisabled();

        String cwBasicButtonName();

        String cwBasicButtonNormal();
    }

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

    /**
     * Constructor.
     *
     * @param constants the constants
     */
    public CwBasicButton(CwConstants constants) {
        super(constants.cwBasicButtonName(), constants.cwBasicButtonDescription(), true);
        this.constants = constants;
    }

    /**
     * Initialize this example.
     */
    @ShowcaseSource
    @Override
    public Widget onInitialize() {
        // Create a panel to align the widgets
        HorizontalPanel hPanel = new HorizontalPanel();
        hPanel.setSpacing(10);

        // Add a normal button
        Button normalButton = new Button(constants.cwBasicButtonNormal(), new ClickHandler() {
            public void onClick(ClickEvent event) {
                Window.alert(constants.cwBasicButtonClickMessage());
            }
        });
        normalButton.ensureDebugId("cwBasicButton-normal");
        hPanel.add(normalButton);

        // Add a disabled button
        Button disabledButton = new Button(constants.cwBasicButtonDisabled());
        disabledButton.ensureDebugId("cwBasicButton-disabled");
        disabledButton.setEnabled(false);
        hPanel.add(disabledButton);

        // Return the panel
        return hPanel;
    }

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

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

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