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