| /* |
| * Copyright 2008 Google Inc. |
| * |
| * 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.gwt.user.client.ui.impl; |
| |
| import com.google.gwt.core.client.GWT; |
| import com.google.gwt.dom.client.Document; |
| import com.google.gwt.dom.client.Element; |
| import com.google.gwt.user.client.ui.Image; |
| |
| /** |
| * Uses a combination of a clear image and a background image to clip all except |
| * a desired portion of an underlying image. |
| * |
| * Do not use this class - it is used for implementation only, and its methods |
| * may change in the future. |
| */ |
| public class ClippedImageImpl { |
| |
| public void adjust(Element img, String url, int left, int top, int width, |
| int height) { |
| String style = "url(" + url + ") no-repeat " + (-left + "px ") |
| + (-top + "px"); |
| img.getStyle().setProperty("background", style); |
| img.getStyle().setPropertyPx("width", width); |
| img.getStyle().setPropertyPx("height", height); |
| } |
| |
| public Element createStructure(String url, int left, int top, int width, |
| int height) { |
| Element tmp = Document.get().createSpanElement(); |
| tmp.setInnerHTML(getHTML(url, left, top, width, height)); |
| return tmp.getFirstChildElement(); |
| } |
| |
| public String getHTML(String url, int left, int top, int width, int height) { |
| String style = "width: " + width + "px; height: " + height |
| + "px; background: url(" + url + ") no-repeat " + (-left + "px ") |
| + (-top + "px"); |
| |
| String clippedImgHtml = "<img " |
| + "onload='this.__gwtLastUnhandledEvent=\"load\";' src='" |
| + GWT.getModuleBaseURL() + "clear.cache.gif' style='" + style |
| + "' border='0'>"; |
| |
| return clippedImgHtml; |
| } |
| |
| public Element getImgElement(Image image) { |
| return image.getElement(); |
| } |
| } |