javascript - extjs 在 TreePanel 中加载图像

Question

我创建了一个 Ext.TreePanel 并且我会在节点中有一个图像，在节点的文本中我有图像的 url 但我无法在页面中加载它，我只看到文本，那里是否可以查看图像？

这是我的代码

var root1 = new Tree.AsyncTreeNode({
    text: 'Legenda degli starti PAT',
    draggable:true, // disable root node dragging
    id:'source'
});

var tree1 = new Tree.TreePanel({
    renderTo : 'legend',
    animate:true, 
    loader: new Tree.TreeLoader({dataUrl:'legend.php'}),
    containerScroll: true,
    root: root1,
});

这是 TreePanel 请求的响应

[{"text":"comuni","id":"co","leaf":false,"cls":"folder","children":[{"text":"http:\/\/localhost\
/cgi-bin\/mapserv?map=\/home\/gis\/mapserver\/cartocomune_wms.map&SERVICE=wms&FORMAT=png&VERSION=1.1
.1&LAYER=comuni&REQUEST=GetLegendGraphic","id":"comuni","leaf":true,"cls":"file"}]},{"text":"idrografia"
,"id":"id","leaf":false,"cls":"folder","children":[{"text":"http:\/\/localhost\/cgi-bin\/mapserv
?map=\/home\/gis\/mapserver\/cartocomune_wms.map&SERVICE=wms&FORMAT=png&VERSION=1.1.1&LAYER=idrografia
&REQUEST=GetLegendGraphic","id":"idrografia","leaf":true,"cls":"file"}]},{"text":"viabilita","id":"via"
,"leaf":false,"cls":"folder","children":[{"text":"http:\/\/localhost\/cgi-bin\/mapserv?map=\/home
\/gis\/mapserver\/cartocomune_wms.map&SERVICE=wms&FORMAT=png&VERSION=1.1.1&LAYER=viabilita&REQUEST=GetLegendGraphic"
,"id":"viabilita","leaf":true,"cls":"file"}]},{"text":"uso_suolo","id":"uso","leaf":false,"cls":"folder"
,"children":[{"text":"http:\/\/localhost\/cgi-bin\/mapserv?map=\/home\/gis\/mapserver\/cartocomune_wms
.map&SERVICE=wms&FORMAT=png&VERSION=1.1.1&LAYER=uso_suolo&REQUEST=GetLegendGraphic","id":"uso_suolo"
,"leaf":true,"cls":"file"}]},{"text":"catasto","id":"cat","leaf":false,"cls":"folder","children":[{"text"
:"http:\/\/localhost\/cgi-bin\/mapserv?map=\/home\/gis\/mapserver\/cartocomune_wms.map&SERVICE=wms
&FORMAT=png&VERSION=1.1.1&LAYER=catasto&REQUEST=GetLegendGraphic","id":"catasto","leaf":true,"cls":"file"
}]}]

谢谢 卢卡

Answer 1

您需要在 JSON 中为节点包含一个“iconCls”属性，该属性引用一个 CSS 类，该类定义了您希望为该特定节点显示的图像。

根据 extjs.com 上的 API 文档:

//在类的配置中指定属性: ... iconCls: '我的图标'

//指定要用作图标图像的背景图像的 css 类: .my-icon { background-image: url(../images/my-icon.gif) 0 6px no-repeat !important;

因此您的 JSON 将如下所示:

[{"text":"comuni","id":"co","leaf":false,"cls":"folder","children":[{"text":"http://本地主机\ /cgi-bin/mapserv?map=/home/gis/mapserver/cartocomune_wms.map&SERVICE=wms&FORMAT=png&VERSION=1.1 .1&LAYER=comuni&REQUEST=GetLegendGraphic","id":"comuni","leaf":true,"cls":"file", "iconCls": "my-icon"}]}, {“文本”:“idrografia” ,"id":"id","leaf":false,"cls":"folder", "iconCls": "my-icon"} ...等等...等等... }]