com.userweave.components.imageUpload.IconUploadPanel.java Source code

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Here is the source code for com.userweave.components.imageUpload.IconUploadPanel.java

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/*******************************************************************************
 * This file is part of UserWeave.
 *
 *     UserWeave is free software: you can redistribute it and/or modify
 *     it under the terms of the GNU Affero General Public License as published by
 *     the Free Software Foundation, either version 3 of the License, or
 *     (at your option) any later version.
 *
 *     UserWeave is distributed in the hope that it will be useful,
 *     but WITHOUT ANY WARRANTY; without even the implied warranty of
 *     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *     GNU Affero General Public License for more details.
 *
 *     You should have received a copy of the GNU Affero General Public License
 *     along with UserWeave.  If not, see <http://www.gnu.org/licenses/>.
 *
 * Copyright 2012 User Prompt GmbH | Psychologic IT Expertise
 *******************************************************************************/
package com.userweave.components.imageUpload;

import org.apache.wicket.AttributeModifier;
import org.apache.wicket.Page;
import org.apache.wicket.ajax.AjaxRequestTarget;
import org.apache.wicket.extensions.ajax.markup.html.modal.ModalWindow;
import org.apache.wicket.markup.html.form.upload.FileUpload;
import org.apache.wicket.markup.html.form.upload.FileUploadField;
import org.apache.wicket.markup.html.image.NonCachingImage;
import org.apache.wicket.markup.html.panel.Panel;
import org.apache.wicket.model.Model;
import org.apache.wicket.model.StringResourceModel;
import org.apache.wicket.request.resource.DynamicImageResource;

import com.userweave.components.authorization.AuthOnlyAjaxLink;
import com.userweave.components.customModalWindow.CustomModalWindow;
import com.userweave.components.image.uploadpage.IconUploadPage;
import com.userweave.domain.StudyState;
import com.userweave.module.methoden.iconunderstandability.page.conf.images.ImageUploadCallback;
import com.userweave.pages.configuration.EnabledInStudyState;

/**
 * Panel to upload an icon for study or project configuration.
 * 
 * @author opr
 *
 */
public class IconUploadPanel extends Panel {
    private static final long serialVersionUID = 1L;

    @EnabledInStudyState(states = { StudyState.INIT })
    private abstract class IconActionLink extends AuthOnlyAjaxLink {
        private static final long serialVersionUID = 1L;

        public IconActionLink(String id) {
            super(id);
        }

        public IconActionLink(String id, ToolTipType type) {
            super(id, type);
        }
    }

    /**
     * Icon upload modal window.
     */
    private CustomModalWindow iconUpload;

    /**
     * Callback to fire on after image upload.
     */
    private final ImageUploadCallback imageUpload;

    private NonCachingImage image;

    /**
     * Default constructor.
     * 
     * @param id
     * @param imageUpload
     */
    public IconUploadPanel(String id, ImageUploadCallback imageUpload) {
        super(id);

        this.imageUpload = imageUpload;

        init(0, 0);
    }

    /**
     * Constructor to set the image dimensions.
     * 
     * @param id
     * @param width
     * @param heigth
     * @param imageUpload
     */
    public IconUploadPanel(String id, int width, int heigth, ImageUploadCallback imageUpload) {
        super(id);

        this.imageUpload = imageUpload;

        init(width, heigth);
    }

    private void init(final int width, final int height) {
        setOutputMarkupId(true);

        addIconUploadModal(width, height);

        add(new IconActionLink("upload") {
            private static final long serialVersionUID = 1L;

            @Override
            public void onClick(AjaxRequestTarget target) {
                iconUpload.show(target);
            }
        });

        add(new IconActionLink("delete") {
            private static final long serialVersionUID = 1L;

            @Override
            public void onClick(AjaxRequestTarget target) {
                imageUpload.remove();
                target.add(IconUploadPanel.this);

                replaceImage(target, width, height);
            }
        });

        addImage(width, height);
    }

    private void addIconUploadModal(final int width, final int height) {
        iconUpload = new CustomModalWindow("iconUploadModal");

        add(iconUpload);

        iconUpload.setTitle(new StringResourceModel("uploadFile", IconUploadPanel.this, null));

        iconUpload.setPageCreator(new ModalWindow.PageCreator() {
            private static final long serialVersionUID = 1L;

            @Override
            public Page createPage() {
                return new IconUploadPage(iconUpload) {
                    private static final long serialVersionUID = 1L;

                    @Override
                    protected void onSubmit(FileUploadField fileUploadField) throws Exception {
                        FileUpload fileUpload = fileUploadField.getFileUpload();

                        if (fileUpload != null) {
                            imageUpload.saveFileUpload(fileUpload);
                        }
                    }
                };
            }
        });

        iconUpload.setWindowClosedCallback(new ModalWindow.WindowClosedCallback() {
            private static final long serialVersionUID = 1L;

            @Override
            public void onClose(AjaxRequestTarget target) {
                target.add(IconUploadPanel.this);

                replaceImage(target, width, height);
            }
        });
    }

    private void addImage(int width, int height) {
        add(image = getImage(width, height));
    }

    private void replaceImage(AjaxRequestTarget target, int width, int height) {
        NonCachingImage replacement = getImage(width, height);

        image.replaceWith(replacement);

        image = replacement;

        target.add(image);
    }

    private NonCachingImage getImage(int width, int height) {
        NonCachingImage image = new NonCachingImage("image", new DynamicImageResource() {
            private static final long serialVersionUID = 1L;

            @Override
            protected byte[] getImageData(Attributes attributes) {
                byte[] imageData = imageUpload.getImageData();
                if (imageData != null) {
                    return imageData;
                } else {
                    return new byte[] {};
                }
            }
        });

        if ((height > 0) && (width > 0)) {
            image.add(new AttributeModifier("style", new Model<String>(
                    "width: " + Integer.toString(width) + "px;" + "height: " + Integer.toString(height) + "px;")));
        }

        image.setOutputMarkupId(true);

        return image;
    }
}