org.onesocialweb.gwt.client.ui.dialog.PicturePreviewDialog.java Source code

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Here is the source code for org.onesocialweb.gwt.client.ui.dialog.PicturePreviewDialog.java

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/*
 *  Copyright 2010 Vodafone Group Services Ltd.
 *
 *  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 org.onesocialweb.gwt.client.ui.dialog;

import org.onesocialweb.gwt.client.i18n.UserInterfaceText;
import org.onesocialweb.gwt.client.ui.widget.StyledFlowPanel;

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.event.logical.shared.ResizeEvent;
import com.google.gwt.event.logical.shared.ResizeHandler;
import com.google.gwt.event.shared.HandlerRegistration;
import com.google.gwt.user.client.Window;
import com.google.gwt.user.client.ui.Button;
import com.google.gwt.user.client.ui.HorizontalPanel;
import com.google.gwt.user.client.ui.Image;
import com.google.gwt.user.client.ui.VerticalPanel;

public class PicturePreviewDialog extends AbstractDialog {

    // internationalization
    private UserInterfaceText uiText = (UserInterfaceText) GWT.create(UserInterfaceText.class);

    // private final LoginHandler loginHandler;
    private static PicturePreviewDialog instance;
    private Button buttonOK = new Button(uiText.OK());
    private final Image image = new Image();
    private final StyledFlowPanel wrapper = new StyledFlowPanel("wrapper");

    private HandlerRegistration resizehandler;

    public static PicturePreviewDialog getInstance() {
        if (instance == null) {
            instance = new PicturePreviewDialog();
        }
        return instance;
    }

    public void showDialog(String url, String title) {
        setText(title);
        image.setUrl(url);
        center();
        buttonOK.setFocus(true);
    }

    private PicturePreviewDialog() {

        // Create dialog
        VerticalPanel vpanel1 = new VerticalPanel();
        HorizontalPanel buttoncontainer = new HorizontalPanel();

        wrapper.add(image);
        vpanel1.add(wrapper);
        vpanel1.add(buttoncontainer);

        buttoncontainer.add(buttonOK);
        buttoncontainer.setStyleName("dialogButtons");

        setWidget(vpanel1);

        buttonOK.addClickHandler(new ClickHandler() {
            public void onClick(ClickEvent event) {

                PicturePreviewDialog.getInstance().hide();
            }
        });

    }

    public void updateSize() {
        Integer height = Math.round((Window.getClientHeight())) - 200;
        Integer width = Math.round((Window.getClientWidth())) - 100;

        if (image.getHeight() > height && image.getWidth() > width) {
            wrapper.getElement().setAttribute("style",
                    "height: " + Integer.toString(height) + "px; width: " + Integer.toString(width) + "px;");
            center();
        } else if (image.getWidth() > width) {
            wrapper.getElement().setAttribute("style", "width: " + Integer.toString(width) + "px;");
            center();
        } else if (image.getHeight() > height) {
            wrapper.getElement().setAttribute("style", "height: " + Integer.toString(height) + "px; width: "
                    + Integer.toString(image.getWidth() + 15) + "px;");
            center();
        } else {
            wrapper.getElement().setAttribute("style", "");
            center();
        }

    }

    @Override
    protected void onHide() {
        resizehandler.removeHandler();
        ;

    }

    @Override
    protected void onShow() {
        updateSize();
        // handlers
        resizehandler = Window.addResizeHandler(new ResizeHandler() {
            public void onResize(ResizeEvent event) {
                updateSize();
            }
        });
    }

}