taxeditor-editor/src/main/java/eu/etaxonomy/taxeditor/forms/ImageElement.java

   1 // $Id$
   2 /**
   3 * Copyright (C) 2007 EDIT
   4 * European Distributed Institute of Taxonomy
   5 * http://www.e-taxonomy.eu
   6 *
   7 * The contents of this file are subject to the Mozilla Public License Version 1.1
   8 * See LICENSE.TXT at the top of this package for the full license terms.
   9 */
  10
  11 package eu.etaxonomy.taxeditor.forms;
  12
  13 import java.io.IOException;
  14 import java.io.InputStream;
  15 import java.net.URI;
  16
  17 import org.apache.http.HttpException;
  18 import org.eclipse.core.runtime.IProgressMonitor;
  19 import org.eclipse.core.runtime.IStatus;
  20 import org.eclipse.core.runtime.Status;
  21 import org.eclipse.core.runtime.jobs.Job;
  22 import org.eclipse.swt.SWTException;
  23 import org.eclipse.swt.events.ControlEvent;
  24 import org.eclipse.swt.events.ControlListener;
  25 import org.eclipse.swt.events.PaintEvent;
  26 import org.eclipse.swt.events.PaintListener;
  27 import org.eclipse.swt.graphics.Image;
  28 import org.eclipse.swt.graphics.Rectangle;
  29 import org.eclipse.swt.widgets.Composite;
  30 import org.eclipse.swt.widgets.Display;
  31 import org.eclipse.ui.forms.widgets.TableWrapData;
  32
  33 import eu.etaxonomy.cdm.common.UriUtils;
  34 import eu.etaxonomy.taxeditor.editor.EditorUtil;
  35
  36 /**
  37  * <p>ImageElement class.</p>
  38  *
  39  * @author n.hoffmann
  40  * @created Sep 24, 2010
  41  * @version 1.0
  42  */
  43 public class ImageElement extends AbstractCdmFormElement implements PaintListener, ControlListener{
  44
  45         private URI imageUri;
  46         private Image image;
  47         private Rectangle imageMaxBounds;
  48
  49         private Composite container;
  50
  51         /**
  52          * <p>Constructor for ImageElement.</p>
  53          *
  54          * @param formFactory a {@link eu.etaxonomy.taxeditor.forms.CdmFormFactory} object.
  55          * @param parentElement a {@link eu.etaxonomy.taxeditor.forms.ICdmFormElement} object.
  56          * @param imageUri a {@link java.net.URI} object.
  57          * @param style a int.
  58          */
  59         protected ImageElement(CdmFormFactory formFactory, ICdmFormElement parentElement, URI imageUri, int style) {
  60                 super(formFactory, parentElement);
  61
  62                 setImageUri(imageUri);
  63
  64                 container = new Composite(getLayoutComposite(), style);
  65                 container.setLayoutData(CdmFormFactory.FILL(2, 1));
  66
  67                 container.addControlListener(this);
  68                 container.addPaintListener(this);
  69         }
  70
  71
  72         /* (non-Javadoc)
  73          * @see eu.etaxonomy.taxeditor.forms.ISelectable#setSelected(boolean)
  74          */
  75         /** {@inheritDoc} */
  76         @Override
  77         public void setSelected(boolean selected) {
  78                 // TODO Auto-generated method stub
  79
  80         }
  81
  82         /**
  83          * <p>Setter for the field <code>imageUri</code>.</p>
  84          *
  85          * @param uri a {@link java.net.URI} object.
  86          */
  87         public void setImageUri(URI uri) {
  88                 this.imageUri = uri;
  89
  90                 if(imageUri != null){
  91
  92                         final Display display = Display.getCurrent();
  93                         Job job = new Job("Loading image: " + imageUri){
  94                                 @Override
  95                                 protected IStatus run(IProgressMonitor monitor) {
  96                                         try {
  97                                                 InputStream imageStream = UriUtils.getInputStream(imageUri);
  98
  99                                                 image = new Image(Display.getCurrent(), imageStream);
 100
 101                                                 display.asyncExec(new Runnable(){
 102                                                         @Override
 103                                                         public void run() {
 104                                                                 EditorUtil.reflowDetailsViewer();
 105 //                                                              getLayoutComposite().layout();
 106                                                         }
 107                                                 });
 108                                                 return Status.OK_STATUS;
 109                                         }catch (Exception e) {
 110                                                 EditorUtil.errorDialog("Could not load image", getClass(), e.getMessage(), e);
 111                                         }
 112                                         return Status.CANCEL_STATUS;
 113                                 }
 114                         };
 115
 116                         job.schedule();
 117                 }
 118         }
 119
 120         private void calculateImageBounds(){
 121                 Rectangle imageBounds = image.getBounds();
 122                 Rectangle containerBounds = container.getBounds();
 123
 124                 Integer imgWidth = imageBounds.width;
 125                 Integer imgHeight = imageBounds.height;
 126
 127                 Float ratio = imgHeight.floatValue()/imgWidth.floatValue();
 128                 Integer width = containerBounds.width;
 129                 Float height = width * ratio;
 130
 131                 imageMaxBounds = new Rectangle(containerBounds.x, containerBounds.y, width, height.intValue());
 132         }
 133
 134         /**
 135          * <p>Getter for the field <code>imageUri</code>.</p>
 136          *
 137          * @return the imageUri
 138          */
 139         public URI getImageUri() {
 140                 return imageUri;
 141         }
 142
 143         /* (non-Javadoc)
 144          * @see org.eclipse.swt.events.PaintListener#paintControl(org.eclipse.swt.events.PaintEvent)
 145          */
 146         /** {@inheritDoc} */
 147         @Override
 148         public void paintControl(PaintEvent e) {
 149                 if(image != null){
 150                         calculateImageBounds();
 151                         Composite composite = (Composite) e.widget;
 152                         TableWrapData layoutData = CdmFormFactory.FILL(2, 1);
 153                         layoutData.heightHint = imageMaxBounds.height;
 154                         composite.setLayoutData(layoutData);
 155                         e.gc.drawImage(image, 0, 0, image.getBounds().width, image.getBounds().height, 0, 0, imageMaxBounds.width, imageMaxBounds.height);
 156                 }
 157         }
 158
 159
 160         /* (non-Javadoc)
 161          * @see org.eclipse.swt.events.ControlListener#controlMoved(org.eclipse.swt.events.ControlEvent)
 162          */
 163         /** {@inheritDoc} */
 164         @Override
 165         public void controlMoved(ControlEvent e) {
 166                 // TODO Auto-generated method stub
 167
 168         }
 169
 170
 171         /* (non-Javadoc)
 172          * @see org.eclipse.swt.events.ControlListener#controlResized(org.eclipse.swt.events.ControlEvent)
 173          */
 174         /** {@inheritDoc} */
 175         @Override
 176         public void controlResized(ControlEvent e) {
 177                 EditorUtil.reflowDetailsViewer();
 178         }
 179 }