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      1 package com.android.ide.eclipse.adt.internal.editors.ui;
      2 
      3 import static org.eclipse.ui.ISharedImages.IMG_DEC_FIELD_ERROR;
      4 import static org.eclipse.ui.ISharedImages.IMG_DEC_FIELD_WARNING;
      5 import static org.eclipse.ui.ISharedImages.IMG_OBJS_ERROR_TSK;
      6 import static org.eclipse.ui.ISharedImages.IMG_OBJS_WARN_TSK;
      7 
      8 import org.eclipse.jface.resource.CompositeImageDescriptor;
      9 import org.eclipse.jface.resource.ImageDescriptor;
     10 import org.eclipse.jface.viewers.DecorationOverlayIcon;
     11 import org.eclipse.swt.graphics.Image;
     12 import org.eclipse.swt.graphics.ImageData;
     13 import org.eclipse.swt.graphics.Point;
     14 import org.eclipse.ui.ISharedImages;
     15 import org.eclipse.ui.PlatformUI;
     16 
     17 /**
     18  * ImageDescriptor that adds a error marker.
     19  * Based on {@link DecorationOverlayIcon} only available in Eclipse 3.3
     20  */
     21 public class ErrorImageComposite extends CompositeImageDescriptor {
     22 
     23     private Image mBaseImage;
     24     private ImageDescriptor mErrorImageDescriptor;
     25     private Point mSize;
     26 
     27     /**
     28      * Creates a new {@link ErrorImageComposite}
     29      *
     30      * @param baseImage the base image to overlay an icon on top of
     31      */
     32     public ErrorImageComposite(Image baseImage) {
     33         this(baseImage, false);
     34     }
     35 
     36     /**
     37      * Creates a new {@link ErrorImageComposite}
     38      *
     39      * @param baseImage the base image to overlay an icon on top of
     40      * @param warning if true, add a warning icon, otherwise an error icon
     41      */
     42     public ErrorImageComposite(Image baseImage, boolean warning) {
     43         mBaseImage = baseImage;
     44         ISharedImages sharedImages = PlatformUI.getWorkbench().getSharedImages();
     45         mErrorImageDescriptor = sharedImages.getImageDescriptor(
     46                 warning ? IMG_DEC_FIELD_WARNING : IMG_DEC_FIELD_ERROR);
     47         if (mErrorImageDescriptor == null) {
     48             mErrorImageDescriptor = sharedImages.getImageDescriptor(
     49                     warning ? IMG_OBJS_WARN_TSK : IMG_OBJS_ERROR_TSK);
     50         }
     51         mSize = new Point(baseImage.getBounds().width, baseImage.getBounds().height);
     52     }
     53 
     54     @Override
     55     protected void drawCompositeImage(int width, int height) {
     56         ImageData baseData = mBaseImage.getImageData();
     57         drawImage(baseData, 0, 0);
     58 
     59         ImageData overlayData = mErrorImageDescriptor.getImageData();
     60         if (overlayData.width == baseData.width && overlayData.height == baseData.height) {
     61             overlayData = overlayData.scaledTo(14, 14);
     62             drawImage(overlayData, -3, mSize.y - overlayData.height + 3);
     63         } else {
     64             drawImage(overlayData, 0, mSize.y - overlayData.height);
     65         }
     66     }
     67 
     68     @Override
     69     protected Point getSize() {
     70         return mSize;
     71     }
     72 }
     73