com.jain.addon.component.upload.JImage.java Source code

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Here is the source code for com.jain.addon.component.upload.JImage.java

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/* 
 * Copyright 2012 Lokesh Jain.
 * 
 * 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.jain.addon.component.upload;

import java.io.ByteArrayInputStream;
import java.text.SimpleDateFormat;
import java.util.Date;

import com.jain.addon.component.JStreamSource;
import com.vaadin.server.StreamResource;
import com.vaadin.ui.Alignment;
import com.vaadin.ui.Component;
import com.vaadin.ui.CustomField;
import com.vaadin.ui.Embedded;
import com.vaadin.ui.HorizontalLayout;

/**
 * <code>JImage<code> is a Image custom component
 * @author Lokesh Jain
 * @since Aug 28, 2012
 * @version 1.0.0
 */
public class JImage extends CustomField<byte[]> {
    private static final long serialVersionUID = 7490297043002025899L;
    private Embedded image;
    private HorizontalLayout layout;
    private JImageUpload uploader;

    public JImage() {
        this.uploader = new JImageUpload(this);
    }

    public void createImage() {
        if (image != null)
            layout.removeComponent(image);

        image = new Embedded();
        image.setWidth("100%");
        layout.addComponent(image, 0);
        layout.setComponentAlignment(image, Alignment.MIDDLE_LEFT);
    }

    public Class<byte[]> getType() {
        return byte[].class;
    }

    public void updateImage(final byte[] imageData, String fileName) {
        setValue(imageData);
        JStreamSource source = new JStreamSource(new ByteArrayInputStream(imageData));
        image.setSource(new StreamResource(source, fileName));
        image.markAsDirty();
    }

    protected Component initContent() {
        layout = new HorizontalLayout();
        layout.setSpacing(true);
        layout.setWidth("100%");

        if (super.getInternalValue() != null) {
            createImage();
            SimpleDateFormat df = new SimpleDateFormat("yyyyMMddHHmmssSSS");
            String fileName = "myfilename-" + df.format(new Date()) + ".png";
            JStreamSource source = new JStreamSource(new ByteArrayInputStream(super.getInternalValue()));
            image.setSource(new StreamResource(source, fileName));
            image.markAsDirty();
        }

        if (!isReadOnly()) {
            layout.addComponent(uploader);
            layout.setComponentAlignment(uploader, Alignment.MIDDLE_CENTER);
        }
        return layout;
    }

    public String getInterruptionMessage() {
        return uploader.getInterruptionMessage();
    }

    public void setInterruptionMessage(String interruptionMessage) {
        uploader.setInterruptionMessage(interruptionMessage);
    }

    public long getMaxContentLength() {
        return uploader.getMaxContentLength();
    }

    public void setMaxContentLength(long maxContentLength) {
        uploader.setMaxContentLength(maxContentLength);
    }

    public String getUploadButtonCaption() {
        return uploader.getButtonCaption();
    }

    public void setUploadButtonCaption(String uploadButtonCaption) {
        uploader.setButtonCaption(uploadButtonCaption);
    }
}