// Copyright 2012 Google Inc. All Rights Reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package com.google.collide.client.util;
import com.google.gwt.resources.client.ImageResource;
import elemental.css.CSSStyleDeclaration;
import elemental.html.DivElement;
import elemental.html.Element;
/**
* Utilities for applying {@link ImageResource}s to elements.
*/
public class ImageResourceUtils {
/**
* Applies the image resource to the specified element. The image will be
* centered, and the height and width will be set to the height and width of
* the image.
*/
public static void applyImageResource(Element elem, ImageResource image) {
applyImageResource(elem, image, "center", "center");
elem.getStyle().setHeight(image.getHeight(), "px");
elem.getStyle().setWidth(image.getWidth(), "px");
}
/**
* Applies the image resource to the specified element with the specified
* horizontal and vertical background positions.
*
* The height and width of the element are not modified under the presumption
* that if you specify the horizontal and vertical position, the image will
* not be the only content of the element.
*/
public static void applyImageResource(Element elem, ImageResource image, String hPos,
String vPos) {
CSSStyleDeclaration style = elem.getStyle();
style.setBackgroundImage("url(" + image.getSafeUri().asString() + ")");
style.setProperty("background-repeat", "no-repeat");
style.setProperty("background-position", hPos + " " + vPos);
style.setOverflow("hidden");
}
/**
* Creates a div from the specified {@link ImageResource}.
*/
public static DivElement createImageElement(ImageResource image) {
DivElement elem = Elements.createDivElement();
applyImageResource(elem, image);
return elem;
}
}