无JIRA任务,添加一个设置背景图片的组件

src/base/single/backgroundimage/background.image.js

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+/**
+ * 用于设置背景图的区域
+ * @class BI.BackgroundImage
+ * @extends BI.Single
+ */
+BI.BackgroundImage = BI.inherit(BI.Single, {
+    props: {
+        baseCls: "bi-background-image",
+        url: "",
+        width: "100%",
+        height: "100%"
+    },
+
+    render: function () {
+        this.setUrl(this.options.url);
+    },
+
+    setUrl: function (url) {
+        this.options.url = url;
+        this.element.css({
+            "background-image": "url(" + url + ")"
+        });
+    },
+
+    getUrl: function () {
+        return this.options.url;
+    }
+});
+
+BI.shortcut("bi.background_image", BI.BackgroundImage);

src/less/base/single/backgroundimage/background.image.less

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+.bi-background-image {
+  background-size: cover;
+  background-position: center center;
+  background-repeat: no-repeat;
+}