Java Code Examples for com.google.gwt.user.client.ui.Image#setUrl()

@Override
public AbstractImagePrototype scrollTableAscending() {
	return new AbstractImagePrototype() {
		public void applyTo(Image image) {
			image.setUrl("img/sort_asc.gif");
		}

		public Image createImage() {
			return new Image("img/sort_asc.gif");
		}

		public String getHTML() {
			return "<img border=\"0\" src=\"img/sort_asc.gif\"/>";
		}
	};
}
 

@Override
public AbstractImagePrototype scrollTableDescending() {
	return new AbstractImagePrototype() {
		public void applyTo(Image image) {
			image.setUrl("img/sort_desc.gif");
		}

		public Image createImage() {
			return new Image("img/sort_desc.gif");
		}

		public String getHTML() {
			return "<img border=\"0\" src=\"img/sort_desc.gif\"/>";
		}
	};
}
 

@Override
public AbstractImagePrototype scrollTableFillWidth() {
	return new AbstractImagePrototype() {
		public void applyTo(Image image) {
			image.setUrl("img/fill_width.gif");
		}

		public Image createImage() {
			return new Image("img/fill_width.gif");
		}

		public String getHTML() {
			return "<img border=\"0\" src=\"img/fill_width.gif\"/>";
		}
	};
}
 

/**
         * Shows a resource as the {@code <img>} element.
         */
        public void loadImage(String url) {
            ClientUtils.setMembers(display, imgContainer);
            image = new Image();
            image.addLoadHandler(this);
            image.addErrorHandler(this);
            image.setUrl(url);
            drawHandler = imgContainer.addDrawHandler(this);
            resizedHandler = imgContainer.addResizedHandler(this);
            ClientUtils.fine(LOG, "loadImage url: %s, width: %s", url, image.getWidth());
            if (image.getWidth() == 0) {
                WidgetCanvas widgetCanvas = new WidgetCanvas(image);
                widgetCanvas.setVisible(false);
                widgetCanvas.setWidth(1);
                widgetCanvas.setHeight(1);
                widgetCanvas.draw();
                Img loadingImg = new Img("[SKIN]/loadingSmall.gif", 16, 16);
//                Img loadingImg = new Img("[SKIN]/shared/progressCursorTracker.gif", 16, 16);
                loadingImg.setAltText(i18n.ImportBatchDataSource_State_LOADING());
                loadingImg.setPrompt(i18n.ImportBatchDataSource_State_LOADING());
                loadingImg.setLayoutAlign(Alignment.CENTER);
                imgContainer.setMembers(loadingImg, widgetCanvas);
            }
            scheduleForRender();
        }
 

private CanvasElement prepareMissingTileImage() {
	int tileSize = DjvuContext.getTileSize();
	CanvasElement canvas = createImage(tileSize, tileSize);
	Context2d context2d = canvas.getContext2d();
	context2d.setFillStyle("white");
	context2d.fillRect(0, 0, canvas.getWidth(), canvas.getHeight());
	Image image = new Image();
	final ImageElement imageElement = image.getElement().cast();
	imageElement.getStyle().setProperty("visibility", "hidden");
	Event.setEventListener(imageElement, event -> {
		if (Event.ONLOAD == event.getTypeInt()) {
			missingTileImage.getContext2d().drawImage(imageElement, 0, 0);
			RootPanel.get().getElement().removeChild(imageElement);
		}
	});
	RootPanel.get().getElement().appendChild(imageElement);
	image.setUrl(getBlankImageUrl());
	return canvas;
}
 

/**
 * Creates texture region from byte[].
 * <p>
 * GWT platform requires additional step (as far as i know) to deal with Pixmap. It is need to load Image element
 * and wait until it is loaded.
 *
 * @param bytes    Image byte[] representation, not null
 * @param consumer Consumer where you should deal with region, not null
 */
public static void createTextureFromBytes(byte[] bytes, final Consumer<TextureRegion> consumer) {
    String base64 = "data:image/png;base64," + new String(Base64Coder.encode(bytes));
    final Image image = new Image();
    image.setVisible(false);
    image.addLoadHandler(new LoadHandler() {
        @Override
        public void onLoad(LoadEvent event) {
            ImageElement imageElement = image.getElement().cast();
            Pixmap pixmap = new Pixmap(imageElement);
            GdxFIRLogger.log("Image loaded");
            final int orgWidth = pixmap.getWidth();
            final int orgHeight = pixmap.getHeight();
            int width = MathUtils.nextPowerOfTwo(orgWidth);
            int height = MathUtils.nextPowerOfTwo(orgHeight);
            final Pixmap potPixmap = new Pixmap(width, height, pixmap.getFormat());
            potPixmap.drawPixmap(pixmap, 0, 0, 0, 0, pixmap.getWidth(), pixmap.getHeight());
            pixmap.dispose();
            TextureRegion region = new TextureRegion(new Texture(potPixmap), 0, 0, orgWidth, orgHeight);
            potPixmap.dispose();
            RootPanel.get().remove(image);
            consumer.accept(region);
        }
    });
    image.setUrl(base64);
    RootPanel.get().add(image);
}
 

/**
 * Helper method to update the app image
 * @param url  The URL of the image to show
 * @param container  The container that image widget resides
 */
private void updateAppImage(String url, final Panel container) {
    image = new Image();
    image.addStyleName("app-image");
    image.setUrl(url);
    // if the user has provided a gallery app image, we'll load it. But if not
    // the error will occur and we'll load default image
    image.addErrorHandler(new ErrorHandler() {
      public void onError(ErrorEvent event) {
        image.setResource(GalleryImages.get().genericApp());
      }
    });
    container.add(image);

    if(gallery.getSystemEnvironment() != null &&
        gallery.getSystemEnvironment().toString().equals("Development")){
      final OdeAsyncCallback<String> callback = new OdeAsyncCallback<String>(
        // failure message
        MESSAGES.galleryError()) {
          @Override
          public void onSuccess(String newUrl) {
            if (newUrl != null) {
              image.setUrl(newUrl + "?" + System.currentTimeMillis());
            }
          }
        };
      Ode.getInstance().getGalleryService().getBlobServingUrl(url, callback);
    }
}
 

/**
 * Helper method called by constructor to initialize the app's stats fields
 * @param container   The container that stats fields reside
 */
private void initAppStats(Panel container) {
  // Images for stats data
  Image numDownloads = new Image();
  numDownloads.setUrl(DOWNLOAD_ICON_URL);
  Image numLikes = new Image();
  numLikes.setUrl(HOLLOW_HEART_ICON_URL);

  // Add stats data
  container.addStyleName("app-stats");
  container.add(numDownloads);
  container.add(new Label(Integer.toString(app.getDownloads())));
  // Adds dynamic like
  initLikeSection(container);
  // Adds dynamic feature
  initFeatureSection(container);
  // Adds dynamic tutorial
  initTutorialSection(container);
  // Adds dynamic salvage
  initSalvageSection(container);

  // We are not using views and comments at initial launch
  /*
  Image numViews = new Image();
  numViews.setUrl(NUM_VIEW_ICON_URL);
  Image numComments = new Image();
  numComments.setUrl(NUM_COMMENT_ICON_URL);
  container.add(numViews);
  container.add(new Label(Integer.toString(app.getViews())));
  container.add(numComments);
  container.add(new Label(Integer.toString(app.getComments())));
  */
}
 

/**
 * Helper method to update the user's image
 * @param url  The URL of the image to show
 * @param container  The container that image widget resides
 */
private void updateUserImage(final String url, Panel container) {
  userAvatar = new Image();
  //setUrl if the new URL is the same one as it was before; an easy workaround is
  //to make the URL unique so it forces the browser to reload
  userAvatar.setUrl(url + "?" + System.currentTimeMillis());
  userAvatar.addStyleName("app-image");
  if (profileStatus == PRIVATE) {
    //userAvatar.addStyleName("status-updating");
  }
  // if the user has provided a gallery app image, we'll load it. But if not
  // the error will occur and we'll load default image
  userAvatar.addErrorHandler(new ErrorHandler() {
    public void onError(ErrorEvent event) {
      userAvatar.setResource(GalleryImages.get().androidIcon());
    }
  });
  container.add(userAvatar);

  if(gallery.getSystemEnvironment() != null &&
      gallery.getSystemEnvironment().toString().equals("Development")){
    final OdeAsyncCallback<String> callback = new OdeAsyncCallback<String>(
      // failure message
      MESSAGES.galleryError()) {
        @Override
        public void onSuccess(String newUrl) {
          if (userAvatar != null) {
            userAvatar.setUrl(newUrl + "?" + System.currentTimeMillis());
          }
        }
      };
    Ode.getInstance().getGalleryService().getBlobServingUrl(url, callback);
  }
}
 

private GalleryAppWidget(final GalleryApp app) {
  nameLabel = new Label(app.getTitle());
  authorLabel = new Label(app.getDeveloperName());
  numDownloadsLabel = new Label(Integer.toString(app.getDownloads()));
  numLikesLabel = new Label(Integer.toString(app.getLikes()));
  numViewsLabel = new Label(Integer.toString(app.getViews()));
  numCommentsLabel = new Label(Integer.toString(app.getComments()));
  image = new Image();
  image.addErrorHandler(new ErrorHandler() {
    public void onError(ErrorEvent event) {
      image.setResource(GalleryImages.get().genericApp());
    }
  });
  String url = gallery.getCloudImageURL(app.getGalleryAppId());
  image.setUrl(url);

  if(gallery.getSystemEnvironment() != null &&
      gallery.getSystemEnvironment().equals("Development")){
    final OdeAsyncCallback<String> callback = new OdeAsyncCallback<String>(
      // failure message
      MESSAGES.galleryError()) {
        @Override
        public void onSuccess(String newUrl) {
          if (newUrl != null) {
            image.setUrl(newUrl + "?" + System.currentTimeMillis());
          }
        }
      };
    Ode.getInstance().getGalleryService().getBlobServingUrl(url, callback);
  }
}
 

public void checkWebpSupport() {
    Image image = new Image();
    image.setUrl("data:image/webp;base64,UklGRjoAAABXRUJQVlA4IC4AAACyAgCdASoCAAIALmk0mk0iIiIiIgBoSygABc6WWgAA/veff/0PP8bA//LwYAAA");
    image.addLoadHandler(loadEvent -> {
        setUrl(getUrl());
    });
    image.addErrorHandler(errorEvent -> {
        setUrl(getFallbackUrl());
    });
    add(image);
}
 

private GPixmap decodeJPEG(CachedInputStream iff) throws IOException {
	final GPixmap result = new GPixmap();

	final Image image = new Image();
	final ImageElement imageElement = image.getElement().cast();
	imageElement.getStyle().setProperty("visibility", "hidden");
	Event.setEventListener(imageElement, new EventListener() {
		@Override
		public void onBrowserEvent(Event event) {
			if (Event.ONLOAD == event.getTypeInt()) {
				final int w = imageElement.getWidth(), h = imageElement.getHeight();
				final Canvas canvas = Canvas.createIfSupported();
				canvas.setWidth(w + "px");
				canvas.setCoordinateSpaceWidth(w);
				canvas.setHeight(h + "px");
				canvas.setCoordinateSpaceHeight(h);
				canvas.getContext2d().drawImage(imageElement, 0, 0);

				result.init(h, w, null);
				//TODO result.setImageData(canvas.getContext2d().getImageData(0, 0, w, h));
			}
		}
	});
	
	StringBuilder data = new StringBuilder();
	int b;
	while ((b = iff.read()) != -1) {
		data.append((char) b);
	}
	String dataURL = "data:image/jpeg;base64," + btoa(data.toString());
	image.setUrl(dataURL);

	return result;
}
 

private Widget getProductSection() {

        final HorizontalPanel panel = new HorizontalPanel();
        panel.getElement().setAttribute("role", "presentation");
        panel.getElement().setAttribute("aria-hidden", "true");

        final Image logo = new Image();
        logo.getElement().setAttribute("style", "cursor:pointer");
        logo.addClickHandler(new ClickHandler() {
            @Override
            public void onClick(ClickEvent clickEvent) {
                toggleNavigation(false);
                placeManager.revealPlace(new PlaceRequest(NameTokens.HomepagePresenter));
            }
        });
        logo.setStyleName("logo");
        panel.add(logo);

        if (ProductConfig.Profile.PRODUCT.equals(productConfig.getProfile())) {
            logo.addErrorHandler(new ErrorHandler() {
                @Override
                public void onError(ErrorEvent event) {
                    panel.remove(logo);
                    Label productName = new Label(productConfig.getProductName());
                    productName.setStyleName("header-product-name");
                    panel.insert(productName, 0);
                }
            });
            logo.setUrl("images/logo/" + logoName(productConfig.getProductName()) + ".png");
            logo.setAltText(productConfig.getProductName());
        } else {
            logo.setUrl("images/logo/community_title.png");
            logo.setAltText("Wildlfy Application Server");
        }

        return panel;
    }
 

/**
 * Creates list of comments in the app page.
 * @param comments: list of returned gallery comments from callback.
 * @param container: the GUI panel where comments will reside.
 */
public void generateAppPageComments(List<GalleryComment> comments, FlowPanel container) {
  container.clear();  // so don't show previous listing
  if (comments == null) {
    Label noComments = new Label("This app does not have any comments yet.");
    noComments.addStyleName("comment-nope");
    container.add(noComments);
    return;
  }

  for ( GalleryComment c : comments) {
    FlowPanel commentItem = new FlowPanel();
    FlowPanel commentPerson = new FlowPanel();
    FlowPanel commentMeta = new FlowPanel();
    FlowPanel commentContent = new FlowPanel();

    // Add commentPerson, default avatar for now
    Image cPerson = new Image();
    cPerson.setUrl(PERSON_URL);
    commentPerson.add(cPerson);
    commentPerson.addStyleName("comment-person");
    commentItem.add(commentPerson);

    // Add commentContent
    Label cAuthor = new Label(c.getUserName());
    cAuthor.addStyleName("comment-author");
    commentMeta.add(cAuthor);

    Date commentDate = new Date(c.getTimeStamp());
    DateTimeFormat dateFormat = DateTimeFormat.getFormat("yyyy/MM/dd hh:mm:ss a");
    Label cDate = new Label(" on " + dateFormat.format(commentDate));
    cDate.addStyleName("comment-date");
    commentMeta.add(cDate);

    commentMeta.addStyleName("comment-meta");
    commentContent.add(commentMeta);

    Label cText = new Label(c.getComment());
    cText.addStyleName("comment-text");
    commentContent.add(cText);

    commentContent.addStyleName("comment-content");
    commentItem.add(commentContent);

    commentItem.addStyleName("comment-item");
    commentItem.addStyleName("clearfix");
    container.add(commentItem);
  }
}