com.google.gwt.event.dom.client.LoadHandler Java Examples

private Frame createFrame() {
	final Frame frame = new Frame(DEFAULT_TEMPLATE_PATH);
	frame.getElement().setId(DEFAULT_FRAME_NAME);
	frame.setTitle(UIMessages.INSTANCE.previewTitle());
	frame.setWidth("500px");
	frame.setHeight("500px");
	frame.getElement().getStyle().setBackgroundColor("gray");

	frame.setVisible(true);
	RootPanel.get().add(frame);

	frame.addLoadHandler(new LoadHandler() {

		@Override
		public void onLoad(LoadEvent event) {
			frame.getElement().getStyle().setBackgroundColor("white");
			zoomPageComboBox.setValue(75);
		}

	});

	return frame;
}
 

@Override
public void add(final Widget child) {
    if(child instanceof GalleryImage) {
        ((GalleryImage) child).addLoadHandler(new LoadHandler() {
            @Override
            public void onLoad(LoadEvent event) {
                if(thumbnailWidth != null) {
                    child.setWidth(thumbnailWidth);
                }
                if(thumbnailHeight != null) {
                    child.setHeight(thumbnailHeight);
                }
            }
        });

        super.add(child);
    } else {
        throw new IllegalArgumentException("Gallery can only contain GalleryImage's.");
    }
}
 

/**
 * 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);
}
 

/**
 * Enlarges image on page
 */
private static void createImageDialog(String img) {
  // Create the UI elements of the DialogBox
  final DialogBox dialogBox = new DialogBox(true, true); // DialogBox(autohide, modal)
  dialogBox.setStylePrimaryName("ode-DialogBox");
  dialogBox.setGlassEnabled(true);
  dialogBox.setAnimationEnabled(true);
  VerticalPanel DialogBoxContents = new VerticalPanel();
  FlowPanel holder = new FlowPanel();
  Button ok = new Button("Close");
  ok.addClickListener(new ClickListener() {
      public void onClick(Widget sender) {
        dialogBox.hide();
      }
    });
  ok.setStyleName("DialogBox-button");

  // Adds Image
  final Image image = new Image(img);
  image.addLoadHandler(new LoadHandler() {
      public void onLoad(LoadEvent evt) {
        final int imageWidth = image.getWidth();
        final int imageHeight = image.getHeight();
        final int windowWidth = (int) ((float) Window.getClientWidth() * 0.8);
        final int windowHeight = (int) ((float) Window.getClientHeight() * 0.9);
        int effectiveWidth = imageWidth;
        int effectiveHeight = imageHeight;

        if (imageWidth > windowWidth) {
          effectiveWidth = windowWidth;
          effectiveHeight = (int)(imageHeight * ((float)effectiveWidth / imageWidth));
        }

        if (effectiveHeight > windowHeight) {
          effectiveHeight = windowHeight;
          effectiveWidth = (int)(imageWidth * ((float)effectiveHeight / imageHeight));
        }

        image.setPixelSize(effectiveWidth, effectiveHeight);
        dialogBox.center();
      }
    });

  image.setStyleName("DialogBox-image");
  holder.add(ok);
  DialogBoxContents.add(image);
  DialogBoxContents.add(holder);
  dialogBox.setWidget(DialogBoxContents);
  dialogBox.center();
  dialogBox.show();
}
 

@Override
public HandlerRegistration addLoadHandler(final LoadHandler handler) {
    return super.addDomHandler(handler, LoadEvent.getType());
}
 

@Override
public HandlerRegistration addLoadHandler(LoadHandler handler) {
    return image.addHandler(handler, LoadEvent.getType());
}