eu.etaxonomy.taxeditor.store/src/main/java/eu/etaxonomy/taxeditor/ui/element/ImageElement.java

   1 /**
   2  * Copyright (C) 2007 EDIT
   3  * European Distributed Institute of Taxonomy
   4  * http://www.e-taxonomy.eu
   5  *
   6  * The contents of this file are subject to the Mozilla Public License Version 1.1
   7  * See LICENSE.TXT at the top of this package for the full license terms.
   8  */
   9 package eu.etaxonomy.taxeditor.ui.element;
  10
  11 import java.io.IOException;
  12 import java.io.InputStream;
  13
  14 import org.apache.http.HttpException;
  15 import org.eclipse.core.runtime.IProgressMonitor;
  16 import org.eclipse.core.runtime.IStatus;
  17 import org.eclipse.core.runtime.Status;
  18 import org.eclipse.core.runtime.jobs.Job;
  19 import org.eclipse.e4.core.contexts.IEclipseContext;
  20 import org.eclipse.e4.ui.model.application.ui.basic.MPart;
  21 import org.eclipse.e4.ui.workbench.modeling.EPartService;
  22 import org.eclipse.jface.operation.IRunnableWithProgress;
  23 import org.eclipse.swt.events.PaintEvent;
  24 import org.eclipse.swt.events.PaintListener;
  25 import org.eclipse.swt.graphics.GC;
  26 import org.eclipse.swt.graphics.Image;
  27 import org.eclipse.swt.graphics.Rectangle;
  28 import org.eclipse.swt.widgets.Composite;
  29 import org.eclipse.swt.widgets.Control;
  30 import org.eclipse.swt.widgets.Display;
  31 import org.eclipse.swt.widgets.Event;
  32 import org.eclipse.ui.forms.widgets.TableWrapData;
  33
  34 import eu.etaxonomy.cdm.common.URI;
  35 import eu.etaxonomy.cdm.common.UriUtils;
  36 import eu.etaxonomy.taxeditor.model.AbstractUtility;
  37 import eu.etaxonomy.taxeditor.model.MessagingUtils;
  38 import eu.etaxonomy.taxeditor.store.StoreUtil;
  39 import eu.etaxonomy.taxeditor.view.e4.AbstractCdmDataViewer;
  40 import eu.etaxonomy.taxeditor.view.e4.details.DetailsPartE4;
  41 import eu.etaxonomy.taxeditor.view.e4.supplementaldata.SupplementalDataPartE4;
  42
  43 /**
  44  * @author n.hoffmann
  45  * @created Sep 24, 2010
  46  */
  47 public class ImageElement extends AbstractCdmFormElement implements PaintListener{
  48
  49     /**
  50      * @author pplitzner
  51      * @since Jul 17, 2019
  52      */
  53     public class LoadImageJob extends Job {
  54         public LoadImageJob(String name) {
  55             super(name);
  56         }
  57
  58         @Override
  59         protected IStatus run(IProgressMonitor monitor) {
  60             IRunnableWithProgress runnable = getLoadImageRunnable(postRunnable);
  61             try {
  62                 runnable.run(monitor);
  63             } catch (Exception e) {
  64                 MessagingUtils.messageDialog("Could not load image", getClass(), e.getMessage()  + ": " +  getImageUri(), e);
  65             }
  66
  67             return Status.OK_STATUS;
  68         }
  69     }
  70
  71     private URI imageUri;
  72     private Image image;
  73
  74     private Composite container;
  75
  76     private final Runnable postRunnable = new Runnable(){
  77         @Override
  78         public void run() {
  79             try{
  80                 if (getFormFactory() != null && getFormFactory().getContext() != null){
  81                     EPartService partService = getFormFactory().getContext().get(EPartService.class);
  82                     IEclipseContext context =  getFormFactory().getContext().getActiveChild();
  83                     DetailsPartE4 detailsView = AbstractUtility.getDetailsView(partService);
  84                     if(detailsView!=null){
  85                         AbstractCdmDataViewer viewer = detailsView.getViewer();
  86                         if(viewer!=null){
  87                             viewer.reflow();
  88                         }
  89                     }
  90
  91                     MPart mPartSupplemental = partService.findPart("eu.etaxonomy.taxeditor.view.e4.supplementaldata.SupplementalDataPartE4");
  92                     if(mPartSupplemental!=null){
  93                         SupplementalDataPartE4 supplementalPart = (SupplementalDataPartE4)mPartSupplemental.getObject();
  94                         if(supplementalPart!=null){
  95                             AbstractCdmDataViewer viewer = (supplementalPart).getViewer();
  96                             if(viewer!=null){
  97                                 viewer.refresh();
  98                             }
  99                         }
 100                     }
 101                 }
 102                 StoreUtil.reflowParentScrolledForm(getLayoutComposite(), true);
 103             }
 104             catch(IllegalStateException e){
 105                 //when migrating to E4 this execption should not be thrown anymore
 106             }
 107         }
 108     };
 109
 110     protected ImageElement(CdmFormFactory formFactory, ICdmFormElement parentElement, URI imageUri, int style) {
 111         super(formFactory, parentElement);
 112
 113         container = new Composite(getLayoutComposite(), style);
 114         container.setLayoutData(LayoutConstants.FILL(2, 1));
 115
 116         container.addPaintListener(this);
 117     }
 118
 119     public void initImageUri(URI uri) throws IOException, HttpException {
 120         this.imageUri = uri;
 121
 122         InputStream imageStream = UriUtils.getInputStream(imageUri);
 123
 124         image = new Image(Display.getCurrent(), imageStream);
 125     }
 126
 127
 128     public URI getImageUri() {
 129         return imageUri;
 130     }
 131
 132     public void loadImage(){
 133         if(getImageUri() != null){
 134             Job job = new LoadImageJob("Loading image");
 135             job.schedule();
 136         }
 137     }
 138
 139     public IRunnableWithProgress getLoadImageRunnable(final Runnable postRunnable){
 140
 141         final Display display = getLayoutComposite().getDisplay();
 142
 143         IRunnableWithProgress runnable = new IRunnableWithProgress(){
 144
 145             @Override
 146             public void run(IProgressMonitor monitor) {
 147                 monitor.beginTask("Loading: " + getImageUri(), IProgressMonitor.UNKNOWN);
 148
 149                 // redraw the image container
 150                 display.asyncExec(new Runnable(){
 151                     @Override
 152                     public void run() {
 153                         if(! getLayoutComposite().isDisposed() && container!=null){
 154                             Event untypedEvent = new Event();
 155                             untypedEvent.widget = container;
 156                             PaintEvent event = new PaintEvent(untypedEvent);
 157                             event.gc = new GC(container);
 158                             paintControl(event);
 159
 160                         }
 161                     }
 162                 });
 163
 164                 // execute the external runnable
 165                 if(postRunnable != null){
 166                     display.asyncExec(postRunnable);
 167                 }
 168                 monitor.done();
 169             }
 170
 171         };
 172
 173         return runnable;
 174     }
 175
 176     private Rectangle calculateImageBounds(Image image, Control control){
 177         Rectangle imageBounds = image.getBounds();
 178         Rectangle containerBounds = control.getBounds();
 179
 180         Integer imgWidth = imageBounds.width;
 181         Integer imgHeight = imageBounds.height;
 182
 183         Float ratio = imgHeight.floatValue()/imgWidth.floatValue();
 184         Integer width = containerBounds.width;
 185         Integer height = ((Float) (width * ratio)).intValue();
 186
 187         return new Rectangle(containerBounds.x, containerBounds.y, width, height);
 188     }
 189
 190     public void dispose(){
 191         if(image!=null){
 192             image.dispose();
 193             image = null;
 194         }
 195         imageUri = null;
 196         if(container!=null){
 197             container.dispose();
 198             container = null;
 199         }
 200     }
 201
 202     /** {@inheritDoc} */
 203     @Override
 204     public void paintControl(PaintEvent e) {
 205         TableWrapData layoutData = LayoutConstants.FILL(2, 1);
 206         Control control = (Control) e.widget;
 207         if(image != null){
 208             Rectangle imageMaxBounds = calculateImageBounds(image, control);
 209             layoutData.heightHint = imageMaxBounds.height;
 210             e.gc.drawImage(image, 0, 0, image.getBounds().width, image.getBounds().height, 0, 0, imageMaxBounds.width, imageMaxBounds.height);
 211         }else{
 212             layoutData.heightHint = 10;
 213             e.gc.drawRectangle(0, 0, 0, 10);
 214         }
 215         control.setLayoutData(layoutData);
 216         e.gc.dispose();
 217     }
 218
 219 }