Java Code Examples for org.eclipse.swt.graphics.Image#isDisposed()

public static Image getImage(final String imageName, final AbstractUIPlugin plugin) {
    if (plugin == null) {
        return null;
    }
    final ImageRegistry reg = plugin.getImageRegistry();

    Image result = reg.get(imageName);

    if (result != null && !result.isDisposed()) {//prevent from bad dispose
        return result;
    }

    final ImageDescriptor descriptor = getImageDescriptor(imageName, plugin);
    if (descriptor != null) {
        result = descriptor.createImage();
    }

    reg.remove(imageName);
    if (result != null) {
        reg.put(imageName, result);
    }

    return result;
}
 

public static Image getImage(final String imageName) {
    final ImageRegistry reg = getDefault().getImageRegistry();

    Image result = reg.get(imageName);

    if (result != null && !result.isDisposed()) {//prevent from bad dispose
        return result;
    }

    final ImageDescriptor descriptor = ImageDescriptor.createFromURL(getDefault().getBundle().getResource(imageName));
    if (descriptor != null) {
        result = descriptor.createImage();
    }

    reg.remove(imageName);
    if (result != null) {
        reg.put(imageName, result);
    }

    return result;
}
 

@Override
public void dispose(TableCell cell) {
	// only dispose of image here, this method is reused in other methods
	Graphic graphic = cell.getGraphic();
	if (graphic instanceof UISWTGraphic)
	{
		final Image img = ((UISWTGraphic) graphic).getImage();
		if (img != null && !img.isDisposed()){
			Utils.execSWTThread(() -> Utils.disposeSWTObjects(img));

				// see http://forum.vuze.com/thread.jspa?threadID=117243
				// could it be that it isn't being marked as disposed after disposal and
				// being double-disposed?
			((UISWTGraphic) graphic).setImage( null );
		}
	}
}
 

/**
 * Returns a new scaled image.
 *
 * @param source the image to be scaled
 * @param newWidth new width of the image
 * @param newHeight new height of the image
 * @return a scaled image of the source
 */
public static Image resize(final Image source, final int newWidth, final int newHeight) {
	if (source == null) {
		return null;
	}

	if (source.isDisposed()) {
		SWT.error(SWT.ERROR_WIDGET_DISPOSED);
	}

	final Image scaledImage = new Image(source.getDevice(), newWidth, newHeight);
	final GC gc = new GC(scaledImage);
	gc.setAntialias(SWT.ON);
	gc.setInterpolation(SWT.HIGH);
	gc.drawImage(source, 0, 0, source.getBounds().width, source.getBounds().height, 0, 0, newWidth, newHeight);
	gc.dispose();

	return scaledImage;
}
 

/**
 * 启动编辑器。
 * 
 * @param site
 *            the site
 * @param input
 *            the input
 * @throws PartInitException
 *             the part init exception
 * @see org.eclipse.ui.part.EditorPart#init(org.eclipse.ui.IEditorSite,
 *      org.eclipse.ui.IEditorInput)
 */
public void init(IEditorSite site, IEditorInput input) throws PartInitException {
	if (LOGGER.isDebugEnabled()) {
		LOGGER.debug("init(IEditorSite site, IEditorInput input)");
	}
	setSite(site);
	setInput(input);
	// 设置Editor标题栏的显示名称，否则名称用plugin.xml中的name属性
	setPartName(input.getName());

	Image oldTitleImage = titleImage;
	if (input != null) {
		IEditorRegistry editorRegistry = PlatformUI.getWorkbench().getEditorRegistry();
		IEditorDescriptor editorDesc = editorRegistry.findEditor(getSite().getId());
		ImageDescriptor imageDesc = editorDesc != null ? editorDesc.getImageDescriptor() : null;
		titleImage = imageDesc != null ? imageDesc.createImage() : null;
	}

	setTitleImage(titleImage);
	if (oldTitleImage != null && !oldTitleImage.isDisposed()) {
		oldTitleImage.dispose();
	}

	getSite().setSelectionProvider(this);
}
 

/**
 * 销毁图片资源
 */
private void disposeImg() {
	if(null != projectImg && !projectImg.isDisposed()){			
		projectImg.dispose();
	}
	if(null != folderImg&& !folderImg.isDisposed()){			
		folderImg.dispose();
	}
	if(null !=hsXLiffImg && !hsXLiffImg.isDisposed() ){			
		hsXLiffImg.dispose();
	}
	if(null !=htmlImg && !htmlImg.isDisposed()){			
		htmlImg.dispose();
	}
	if(null !=defaultImg && !defaultImg.isDisposed()){			
		defaultImg.dispose();
	}
	for (Entry<String, Image> entry : imgMap.entrySet()) {
		Image value = entry.getValue();
		if(null != value && !value.isDisposed()){				
			value.dispose();
		}
	}
	imgMap.clear();
}
 

private void setProcessMessage(Image image, String message, String tooltip) {
	if (image != null && !image.isDisposed()) {
		tipLabel.setImage(image);
	} else {
		tipLabel.setImage(null);
	}
	tipLabel.setText(message);
	tipLabel.setToolTipText(tooltip);
	tipLabel.pack();
}
 

@Override
public void init(IEditorSite site, IEditorInput input) throws PartInitException {
	if (LOGGER.isDebugEnabled()) {
		LOGGER.debug("init(IEditorSite site, IEditorInput input)");
	}
	setSite(site);
	setInput(input);

	// 设置Editor标题栏的显示名称，否则名称用plugin.xml中的name属性
	setPartName(input.getName());

	Image oldTitleImage = titleImage;
	if (input != null) {
		IEditorRegistry editorRegistry = PlatformUI.getWorkbench().getEditorRegistry();
		IEditorDescriptor editorDesc = editorRegistry.findEditor(getSite().getId());
		ImageDescriptor imageDesc = editorDesc != null ? editorDesc.getImageDescriptor() : null;
		titleImage = imageDesc != null ? imageDesc.createImage() : null;
	}

	setTitleImage(titleImage);
	if (oldTitleImage != null && !oldTitleImage.isDisposed()) {
		oldTitleImage.dispose();
	}

	getSite().setSelectionProvider(this);

	cursorIbeam = new Cursor(null, SWT.CURSOR_IBEAM);
	cursorArrow = new Cursor(null, SWT.CURSOR_ARROW);

	hookListener();
}
 

@Override
public boolean close() {
	for (String code : imageCache.keySet()) {
		Image im = imageCache.get(code);
		if (im != null && !im.isDisposed()) {
			im.dispose();
		}
	}
	imageCache.clear();
	return super.close();
}
 

private void disposeCellIcon(TableCell cell) {
	if (!(cell instanceof TableCellSWT)) {
		return;
	}
	final Image img = ((TableCellSWT) cell).getIcon();
	if (img != null) {
		((TableCellSWT) cell).setIcon(null);
		if (!img.isDisposed()) {
			img.dispose();
		}
	}
}
 

private static Image get(String filename, String overlay) {
	if (filename == null || overlay == null)
		return null;
	String id = filename + "-" + overlay;
	Image withOverlay = registry.get(id);
	if (withOverlay != null && !withOverlay.isDisposed())
		return withOverlay;
	DecorationOverlayIcon withIcon = new DecorationOverlayIcon(
			get(filename), descriptor(overlay), IDecoration.BOTTOM_RIGHT);
	withOverlay = withIcon.createImage();
	registry.put(id, withOverlay);
	return withOverlay;
}
 

public void disposeImage( ExtendedItemHandle handle, Image image )
{
	if ( image != null && !image.isDisposed( ) )
	{
		image.dispose( );
	}

}
 

/**
 * (non-Javadoc)
 * @see org.eclipse.jface.dialogs.DialogPage#dispose()
 */
public void dispose() {
	for (String code : imageCache.keySet()) {
		Image im = imageCache.get(code);
		if (im != null && !im.isDisposed()) {
			im.dispose();
		}
	}
	if (isBidiImage != null && !isBidiImage.isDisposed()) {
		isBidiImage.dispose();
	}
	imageCache.clear();
	super.dispose();
}
 

@Override
public void cellPaint(GC gc, TableCellSWT cell) {
	SubscriptionResultFilterable entry = (SubscriptionResultFilterable) cell.getDataSource();

	Rectangle cellBounds = cell.getBounds();
	Image img = entry== null || entry.getRead() ? imgOld: imgNew;

	if (img != null && !img.isDisposed()) {
		Rectangle imgBounds = img.getBounds();
		gc.drawImage(img, cellBounds.x
				+ ((cellBounds.width - imgBounds.width) / 2), cellBounds.y
				+ ((cellBounds.height - imgBounds.height) / 2));
	}
}
 

private Image getFromImageHash(Object key) {
    synchronized (lock) {
        Image ret = imageHash.get(key);
        if (ret != null && ret.isDisposed()) {
            imageHash.remove(key);
            ret = null;
        }
        return ret;
    }
}
 

@Override
public void cellPaint(GC gc, TableCellSWT cell) {
	ActivitiesEntry entry = (ActivitiesEntry) cell.getDataSource();

	Rectangle cellBounds = cell.getBounds();
	Image img = entry.getReadOn() <= 0 ? imgNew : imgOld;

	if (img != null && !img.isDisposed()) {
		Rectangle imgBounds = img.getBounds();
		gc.drawImage(img, cellBounds.x
				+ ((cellBounds.width - imgBounds.width) / 2), cellBounds.y
				+ ((cellBounds.height - imgBounds.height) / 2));
	}
}
 

/**
 * Convenience method for disposing of an image
 * 
 * @param image
 */
public static void disposeImage(Image image)
{
	if (image != null && !image.isDisposed())
	{
		image.dispose();
	}
}
 

private void disposeImage( Image image ) {
  if ( image != null && !image.isDisposed() ) {
    image.dispose();
  }
}
 

/**
 * Sets the image.
 *
 * @exception IllegalArgumentException <ul>
 *    <li>ERROR_NULL_ARGUMENT - if the image is disposed</li>
 * </ul>
 * @exception SWTException <ul>
 *    <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
 *    <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
 * </ul>
 */
public void setImage(Image image)
{
    checkWidget();

    if (image != null && image.isDisposed())
        SWT.error(SWT.ERROR_INVALID_ARGUMENT);
    this.image = image;
    strategy.update();
}
 

/**
 * Sets the receiver's image at a column.
 *
 * @param index
 *            the column index
 * @param image
 *            the new image
 * @throws IllegalArgumentException
 *             <ul>
 *             <li>ERROR_INVALID_ARGUMENT - if the image has been disposed</li>
 *             </ul>
 * @throws org.eclipse.swt.SWTException
 *             <ul>
 *             <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed
 *             </li>
 *             <li>ERROR_THREAD_INVALID_ACCESS - if not called from the
 *             thread that created the receiver</li>
 *             </ul>
 */
public void setImage(int index, Image image) {
	checkWidget();
	if (image != null && image.isDisposed()) {
		SWT.error(SWT.ERROR_INVALID_ARGUMENT);
	}
	images.set(index, image);

	parent.imageSetOnItem(index, this);

	parent.redraw();
}