js画图开发库--mxgraph--[fileio-文件读取.html]
读取文件：fileio.txt和fileio.xml
<!Doctype html>
<html xmlns=http://www.w3.org/1999/xhtml>
<head>
<meta http-equiv=Content-Type content="text/html;charset=utf-8">
<title>文件IO例子</title>
<!-- 如果本文件的包与src不是在同一个目录,就要将basepath设置到src目录下 -->
<script type="text/javascript">
mxBasePath = '../src';
</script>
<!-- 引入支持库文件 -->
<script type="text/javascript" src="../src/js/mxClient.js"></script>
<!-- 示例代码 -->
<script type="text/javascript">
// 程序在此启动
function main(container)
{
//检查浏览器兼容性
if (!mxClient.isBrowserSupported())
{
mxUtils.error('Browser is not supported!', 200, false);
}
else
{
// 在容器中创建图形
var graph = new mxGraph(container);
graph.setEnabled(false);
graph.setPanning(true);
graph.setTooltips(true);
graph.panningHandler.useLeftButtonForPanning = true;
// 鼠标停留到元素上边缘高亮显示
new mxCellTracker(graph);
// 更改节点的默认样式
var style = graph.getStylesheet().getDefaultVertexStyle();
style[mxConstants.STYLE_SHAPE] = mxConstants.SHAPE_ROUNDED;
style[mxConstants.STYLE_PERIMETER] = mxPerimeter.RectanglePerimeter;
style[mxConstants.STYLE_GRADIENTCOLOR] = 'white';
style[mxConstants.STYLE_PERIMETER_SPACING] = 4;
style[mxConstants.STYLE_SHADOW] = true;
style = graph.getStylesheet().getDefaultEdgeStyle();
style[mxConstants.STYLE_LABEL_BACKGROUNDCOLOR] = 'white';
style = mxUtils.clone(style);
style[mxConstants.STYLE_STARTARROW] = mxConstants.ARROW_CLASSIC;
graph.getStylesheet().putCellStyle('2way', style);
graph.isHtmlLabel = function(cell)
{
return true;
};
// 更改布局网格大小
graph.gridSize = 20;
// 创建布局更新算法
var layout = new mxFastOrganicLayout(graph);
// 移动布局内的元素
layout.forceConstant = 140;
// 添加一个按钮负责改变布局
document.body.appendChild(mxUtils.button('Arrange',function(evt)
{
var parent = graph.getDefaultParent();
layout.execute(parent);
}));
// 开始布局更新
graph.getModel().beginUpdate();
try
{
// 加载自定义的格式文件 (TXT file)
parse(graph, 'fileio.txt');
// 加载 mxGraph 格式文件 (XML file)
//read(graph, 'fileio.xml');
// 在图形中创建默认组件
var parent = graph.getDefaultParent();
// 展示布局内容
layout.execute(parent);
}
finally
{
// 更新事务结束
graph.getModel().endUpdate();
}
//双击事件
graph.dblClick = function(evt, cell)
{
var mxe = new mxEventObject(mxEvent.DOUBLE_CLICK, 'event', evt, 'cell', cell);
this.fireEvent(mxe);
if (this.isEnabled() &&
!mxEvent.isConsumed(evt) &&
!mxe.isConsumed() &&
cell != null)
{
mxUtils.alert('Show properties for cell '+(cell.customId || cell.getId()));
}
};
if (mxClient.IS_QUIRKS)
{
document.body.style.overflow = 'hidden';
new mxDivResizer(container);
}
}
};
// 自定义文件格式解析器
function parse(graph, filename)
{
var model = graph.getModel();
// 创建默认窗体
var parent = graph.getDefaultParent();
var req = mxUtils.load(filename);
var text = req.getText();
var lines = text.split('\n');
// 在表中创建一个顶点
var vertices = [];
// 开始更新事务
graph.getModel().beginUpdate();
try
{
for (var i=0; i<lines.length; i++)
{
// 忽略注释（以＃开头）
var colon = lines[i].indexOf(':');
if (lines[i].substring(0, 1) != "#" ||
colon == -1)
{
var comma = lines[i].indexOf(',');
var value = lines[i].substring(colon+2, lines[i].length);
if (comma == -1 || comma > colon)
{
var key = lines[i].substring(0, colon);
if (key.length > 0)
{
vertices[key] = graph.insertVertex(parent, null, value, 0, 0, 80, 70);
}
}
else if (comma < colon)
{
// 查找表中的节点
var source = vertices[lines[i].substring(0, comma)];
var target = vertices[lines[i].substring(comma+1, colon)];
if (source != null && target != null)
{
var e = graph.insertEdge(parent, null, value, source, target);
// 采用特殊的2-Way 标签的风格
if (value.indexOf('2-Way') >= 0)
{
e.style = '2way';
}
}
}
}
}
}
finally
{
graph.getModel().endUpdate();
}
};
// 解析mxGraph XML文件格式
function read(graph, filename)
{
var req = mxUtils.load(filename);
var root = req.getDocumentElement();
var dec = new mxCodec(root.ownerDocument);
dec.decode(root, graph.getModel());
};
</script>
</head>
<!-- 页面载入时启动程序 -->
<body οnlοad="main(document.getElementById('graphContainer'))" style="margin:4px;">
<!-- 创建带网格壁纸和曲线的一个容器，请一定要定义的position和overflow的属性！根据在线API的54 页内容增加的大小侦听器 -->
<div id="graphContainer" style="position:absolute;overflow:auto;top:36px;bottom:0px;left:0px;right:0px;border-top:gray 1px solid;">
</div>
</body>
</html>
fileio.txt
# Custom file format for fileio.html (comments start with #, all vertices first)
# Vertices (id: label)
1: <img src="editors/images/overlays/user3.png"><br><b>Last, First</b><br>Status<br>Info
2: <img src="editors/images/overlays/error.png"><br><b>Errorcode</b><br>Status<br>Info
3: <img src="editors/images/overlays/flash.png"><br><b>Warning</b><br>Status<br>Info
4: <img src="editors/images/overlays/users3.png"><br><b>Groupname</b><br>Status<br>Info
5: <img src="editors/images/overlays/workplace.png"><br><b>Workplace</b><br>Status<br>Info
6: <img src="editors/images/overlays/information.png"><br><b>Information</b><br>Status<br>Info
7: <img src="editors/images/overlays/printer.png"><br><b>Printername</b><br>Status<br>Info
# Edges (source-id,target-id: label)
1,2: <img src="editors/images/overlays/lightbulb_on.png"> Hint
1,3: <img src="editors/images/overlays/help.png"> News
1,4: <img src="editors/images/overlays/information.png"> Member
5,6: <img src="editors/images/overlays/pencil.png"> Details
5,7: <img src="editors/images/overlays/check.png"> Access
4,5: <img src="editors/images/overlays/forbidden.png"> Access
1,5: <img src="editors/images/overlays/lightbulb_on.png"> 2-Way
fileio.xml
<mxGraphModel>
<root>
<mxCell id="0"/>
<mxCell id="1" parent="0"/>
<mxCell id="2" customId="2" value="<img src="editors/images/overlays/user3.png"><br><b>Last, First</b><br>Status<br>Info" vertex="1" parent="1">
<mxGeometry x="0" y="0" width="80" height="70" as="geometry"/>
</mxCell>
<mxCell id="3" customId="3" value="<img src="editors/images/overlays/error.png"><br><b>Errorcode</b><br>Status<br>Info" vertex="1" parent="1">
<mxGeometry x="0" y="0" width="80" height="70" as="geometry"/>
</mxCell>
<mxCell id="4" customId="4" value="<img src="editors/images/overlays/flash.png"><br><b>Warning</b><br>Status<br>Info" vertex="1" parent="1">
<mxGeometry x="0" y="0" width="120" height="70" as="geometry"/>
</mxCell>
<mxCell id="5" customId="5" value="<img src="editors/images/overlays/users3.png"><br><b>Groupname</b><br>Status<br>Info" vertex="1" parent="1">
<mxGeometry x="0" y="0" width="80" height="70" as="geometry"/>
</mxCell>
<mxCell id="6" customId="6" value="<img src="editors/images/overlays/workplace.png"><br><b>Workplace</b><br>Status<br>Info" vertex="1" parent="1">
<mxGeometry x="0" y="0" width="80" height="70" as="geometry"/>
</mxCell>
<mxCell id="7" customId="6" value="<img src="editors/images/overlays/information.png"><br><b>Information</b><br>Status<br>Info" vertex="1" parent="1">
<mxGeometry x="0" y="0" width="80" height="70" as="geometry"/>
</mxCell>
<mxCell id="8" customId="7" value="<img src="editors/images/overlays/printer.png"><br><b>Printername</b><br>Status<br>Info" vertex="1" parent="1">
<mxGeometry x="0" y="0" width="120" height="70" as="geometry"/>
</mxCell>
<mxCell id="edge-1" customId="edge-1" value="<img src="editors/images/overlays/lightbulb_on.png"> Hint" edge="1" parent="1" source="2" target="3">
<mxGeometry relative="1" as="geometry"/>
</mxCell>
<mxCell id="edge-2" customId="edge-2" value="<img src="editors/images/overlays/help.png"> News" edge="1" parent="1" source="2" target="4">
<mxGeometry relative="1" as="geometry"/>
</mxCell>
<mxCell id="edge-3" customId="edge-3" value="<img src="editors/images/overlays/information.png"> Member" edge="1" parent="1" source="2" target="5">
<mxGeometry relative="1" as="geometry"/>
</mxCell>
<mxCell id="edge-4" customId="edge-4" value="<img src="editors/images/overlays/pencil.png"> Details" edge="1" parent="1" source="6" target="7">
<mxGeometry relative="1" as="geometry"/>
</mxCell>
<mxCell id="edge-5" customId="edge-5" value="<img src="editors/images/overlays/check.png"> Access" edge="1" parent="1" source="6" target="8">
<mxGeometry relative="1" as="geometry"/>
</mxCell>
<mxCell id="edge-6" customId="edge-6" value="<img src="editors/images/overlays/forbidden.png"> Access" edge="1" parent="1" source="5" target="6">
<mxGeometry relative="1" as="geometry"/>
</mxCell>
<mxCell id="edge-7" customId="edge-7" value="<img src="editors/images/overlays/lightbulb_on.png"> 2-Way" style="2way" edge="1" parent="1" source="2" target="6">
<mxGeometry relative="1" as="geometry"/>
</mxCell>
</root>
</mxGraphModel>
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