cms/ui/widgets/Img.java

   1 package org.argeo.cms.ui.widgets;
   2
   3 import javax.jcr.Node;
   4 import javax.jcr.RepositoryException;
   5
   6 import org.argeo.cms.ui.CmsImageManager;
   7 import org.argeo.cms.ui.CmsView;
   8 import org.argeo.cms.ui.internal.JcrFileUploadReceiver;
   9 import org.argeo.cms.ui.util.CmsUiUtils;
  10 import org.argeo.cms.ui.viewers.NodePart;
  11 import org.argeo.cms.ui.viewers.Section;
  12 import org.argeo.cms.ui.viewers.SectionPart;
  13 import org.argeo.jcr.Jcr;
  14 import org.argeo.jcr.JcrException;
  15 import org.eclipse.rap.fileupload.FileUploadHandler;
  16 import org.eclipse.rap.fileupload.FileUploadListener;
  17 import org.eclipse.rap.fileupload.FileUploadReceiver;
  18 import org.eclipse.rap.rwt.service.ServerPushSession;
  19 import org.eclipse.rap.rwt.widgets.FileUpload;
  20 import org.eclipse.swt.SWT;
  21 import org.eclipse.swt.events.SelectionAdapter;
  22 import org.eclipse.swt.events.SelectionEvent;
  23 import org.eclipse.swt.graphics.Point;
  24 import org.eclipse.swt.widgets.Composite;
  25 import org.eclipse.swt.widgets.Control;
  26
  27 /** An image within the Argeo Text framework */
  28 public class Img extends EditableImage implements SectionPart, NodePart {
  29         private static final long serialVersionUID = 6233572783968188476L;
  30
  31         private final Section section;
  32
  33         private final CmsImageManager imageManager;
  34         private FileUploadHandler currentUploadHandler = null;
  35         private FileUploadListener fileUploadListener;
  36
  37         public Img(Composite parent, int swtStyle, Node imgNode, Point preferredImageSize) throws RepositoryException {
  38                 this(Section.findSection(parent), parent, swtStyle, imgNode, preferredImageSize, null);
  39                 setStyle(TextStyles.TEXT_IMAGE);
  40         }
  41
  42         public Img(Composite parent, int swtStyle, Node imgNode) throws RepositoryException {
  43                 this(Section.findSection(parent), parent, swtStyle, imgNode, null, null);
  44                 setStyle(TextStyles.TEXT_IMAGE);
  45         }
  46
  47         public Img(Composite parent, int swtStyle, Node imgNode, CmsImageManager imageManager) throws RepositoryException {
  48                 this(Section.findSection(parent), parent, swtStyle, imgNode, null, imageManager);
  49                 setStyle(TextStyles.TEXT_IMAGE);
  50         }
  51
  52         Img(Section section, Composite parent, int swtStyle, Node imgNode, Point preferredImageSize,
  53                         CmsImageManager imageManager) throws RepositoryException {
  54                 super(parent, swtStyle, imgNode, false, preferredImageSize);
  55                 this.section = section;
  56                 this.imageManager = imageManager != null ? imageManager : CmsView.getCmsView(section).getImageManager();
  57                 CmsUiUtils.style(this, TextStyles.TEXT_IMG);
  58         }
  59
  60         @Override
  61         protected Control createControl(Composite box, String style) {
  62                 if (isEditing()) {
  63                         try {
  64                                 return createImageChooser(box, style);
  65                         } catch (RepositoryException e) {
  66                                 throw new JcrException("Cannot create image chooser", e);
  67                         }
  68                 } else {
  69                         return createLabel(box, style);
  70                 }
  71         }
  72
  73         @Override
  74         public synchronized void stopEditing() {
  75                 super.stopEditing();
  76                 fileUploadListener = null;
  77         }
  78
  79         @Override
  80         protected synchronized Boolean load(Control lbl) {
  81                 try {
  82                         Node imgNode = getNode();
  83                         boolean loaded = imageManager.load(imgNode, lbl, getPreferredImageSize());
  84                         // getParent().layout();
  85                         return loaded;
  86                 } catch (RepositoryException e) {
  87                         throw new JcrException("Cannot load " + getNodeId() + " from image manager", e);
  88                 }
  89         }
  90
  91         protected Node getUploadFolder() {
  92                 return Jcr.getParent(getNode());
  93         }
  94
  95         protected String getUploadName() {
  96                 Node node = getNode();
  97                 return Jcr.getName(node) + '[' + Jcr.getIndex(node) + ']';
  98         }
  99
 100         protected CmsImageManager getImageManager() {
 101                 return imageManager;
 102         }
 103
 104         protected Control createImageChooser(Composite box, String style) throws RepositoryException {
 105                 JcrFileUploadReceiver receiver = new JcrFileUploadReceiver(this, getUploadFolder(), getUploadName(),
 106                                 imageManager);
 107                 if (currentUploadHandler != null)
 108                         currentUploadHandler.dispose();
 109                 currentUploadHandler = prepareUpload(receiver);
 110                 final ServerPushSession pushSession = new ServerPushSession();
 111                 final FileUpload fileUpload = new FileUpload(box, SWT.NONE);
 112                 CmsUiUtils.style(fileUpload, style);
 113                 fileUpload.addSelectionListener(new SelectionAdapter() {
 114                         private static final long serialVersionUID = -9158471843941668562L;
 115
 116                         @Override
 117                         public void widgetSelected(SelectionEvent e) {
 118                                 pushSession.start();
 119                                 fileUpload.submit(currentUploadHandler.getUploadUrl());
 120                         }
 121                 });
 122                 return fileUpload;
 123         }
 124
 125         protected FileUploadHandler prepareUpload(FileUploadReceiver receiver) {
 126                 final FileUploadHandler uploadHandler = new FileUploadHandler(receiver);
 127                 if (fileUploadListener != null)
 128                         uploadHandler.addUploadListener(fileUploadListener);
 129                 return uploadHandler;
 130         }
 131
 132         @Override
 133         public Section getSection() {
 134                 return section;
 135         }
 136
 137         public void setFileUploadListener(FileUploadListener fileUploadListener) {
 138                 this.fileUploadListener = fileUploadListener;
 139                 if (currentUploadHandler != null)
 140                         currentUploadHandler.addUploadListener(fileUploadListener);
 141         }
 142
 143         @Override
 144         public Node getItem() throws RepositoryException {
 145                 return getNode();
 146         }
 147
 148         @Override
 149         public String getPartId() {
 150                 return getNodeId();
 151         }
 152
 153         @Override
 154         public String toString() {
 155                 return "Img #" + getPartId();
 156         }
 157
 158 }