js画图开发库--mxgraph--[portrefs-按接口连接.html]
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<!Doctype html>
<html xmlns=http://www.w3.org/1999/xhtml>
<head>
<meta http-equiv=Content-Type content="text/html;charset=utf-8">
<title>按接口连接</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">
function main(container)
{
// 替换接口图片
mxConstraintHandler.prototype.pointImage = new mxImage('images/dot.gif', 10, 10);
var graph = new mxGraph(container);
graph.setConnectable(true);
// 禁用端口自动处理。这将禁用mxGraph.cellConnected的复位功能。请注意，此功能可能是有用的，如果浮动和固定连接相结合。
graph.setPortsEnabled(false);
// 启动浏览器默认右键菜单
new mxRubberband(graph);
// 创建默认窗口
var parent = graph.getDefaultParent();
// 各接口状态相同
var ports = new Array();
// NOTE: Constraint is used later for orthogonal edge routing (currently ignored)
ports['w'] = {x: 0, y: 0.5, perimeter: true, constraint: 'west'};
ports['e'] = {x: 1, y: 0.5, perimeter: true, constraint: 'east'};
ports['n'] = {x: 0.5, y: 0, perimeter: true, constraint: 'north'};
ports['s'] = {x: 0.5, y: 1, perimeter: true, constraint: 'south'};
ports['nw'] = {x: 0, y: 0, perimeter: true, constraint: 'north west'};
ports['ne'] = {x: 1, y: 0, perimeter: true, constraint: 'north east'};
ports['sw'] = {x: 0, y: 1, perimeter: true, constraint: 'south west'};
ports['se'] = {x: 1, y: 1, perimeter: true, constraint: 'south east'};
// 创建接口数组
var ports2 = new Array();
// NOTE: 用于连接时的点
ports2['in1'] = {x: 0, y: 0, perimeter: true, constraint: 'west'};
ports2['in2'] = {x: 0, y: 0.25, perimeter: true, constraint: 'west'};
ports2['in3'] = {x: 0, y: 0.5, perimeter: true, constraint: 'west'};
ports2['in4'] = {x: 0, y: 0.75, perimeter: true, constraint: 'west'};
ports2['in5'] = {x: 0, y: 1, perimeter: true, constraint: 'west'};
ports2['out1'] = {x: 0.5, y: 0, perimeter: true, constraint: 'north east'};
ports2['out2'] = {x: 1, y: 0.5, perimeter: true, constraint: 'east'};
ports2['out3'] = {x: 0.5, y: 1, perimeter: true, constraint: 'south east'};
//返回端口
mxShape.prototype.getPorts = function()
{
return ports;
};
mxTriangle.prototype.getPorts = function()
{
return ports2;
};
// 禁止浮动自动连接
graph.connectionHandler.isConnectableCell = function(cell)
{
return false;
};
mxEdgeHandler.prototype.isConnectableCell = function(cell)
{
return graph.connectionHandler.isConnectableCell(cell);
};
// 禁用现有的端口功能
graph.view.getTerminalPort = function(state, terminal, source)
{
return terminal;
};
// 对于一个给定的元素返回的所有可能的端口
graph.getAllConnectionConstraints = function(terminal, source)
{
if (terminal != null && terminal.shape != null &&
terminal.shape instanceof mxStencilShape)
{
// for stencils with existing constraints...
if (terminal.shape.stencil != null)
{
return terminal.shape.stencil.constraints;
}
}
else if (terminal != null && this.model.isVertex(terminal.cell))
{
if (terminal.shape != null)
{
var ports = terminal.shape.getPorts();
var cstrs = new Array();
for (var id in ports)
{
var port = ports[id];
var cstr = new mxConnectionConstraint(new mxPoint(port.x, port.y), port.perimeter);
cstr.id = id;
cstrs.push(cstr);
}
return cstrs;
}
}
return null;
};
// 将端口设置为给定的连接
graph.setConnectionConstraint = function(edge, terminal, source, constraint)
{
if (constraint != null)
{
var key = (source) ? mxConstants.STYLE_SOURCE_PORT : mxConstants.STYLE_TARGET_PORT;
if (constraint == null || constraint.id == null)
{
this.setCellStyles(key, null, [edge]);
}
else if (constraint.id != null)
{
this.setCellStyles(key, constraint.id, [edge]);
}
}
};
// 返回在给定的连接的端口
graph.getConnectionConstraint = function(edge, terminal, source)
{
var key = (source) ? mxConstants.STYLE_SOURCE_PORT : mxConstants.STYLE_TARGET_PORT;
var id = edge.style[key];
if (id != null)
{
var c = new mxConnectionConstraint(null, null);
c.id = id;
return c;
}
return null;
};
// 返回重定向约束的实际端口
graphGetConnectionPoint = graph.getConnectionPoint;
graph.getConnectionPoint = function(vertex, constraint)
{
if (constraint.id != null && vertex != null && vertex.shape != null)
{
var port = vertex.shape.getPorts()[constraint.id];
if (port != null)
{
constraint = new mxConnectionConstraint(new mxPoint(port.x, port.y), port.perimeter);
}
}
return graphGetConnectionPoint.apply(this, arguments);
};
// 开始更新事务
graph.getModel().beginUpdate();
try
{
var v1 = graph.insertVertex(parent, null, 'A', 20, 20, 100, 40);
var v2 = graph.insertVertex(parent, null, 'B', 80, 100, 100, 100,
'shape=ellipse;perimeter=ellipsePerimeter');
var v3 = graph.insertVertex(parent, null, 'C', 190, 30, 100, 60,
'shape=triangle;perimeter=trianglePerimeter;direction=south');
var e1 = graph.insertEdge(parent, null, '', v1, v2, 'sourcePort=s;targetPort=nw');
var e2 = graph.insertEdge(parent, null, '', v1, v3, 'sourcePort=e;targetPort=out3');
}
finally
{
// 结束更新事务
graph.getModel().endUpdate();
}
// 连接线的折线风格
/*
graph.getStylesheet().getDefaultEdgeStyle()['edgeStyle'] = 'orthogonalEdgeStyle';
var mxUtilsGetPortConstraints = mxUtils.getPortConstraints;
mxUtils.getPortConstraints = function(terminal, edge, source, defaultValue)
{
var key = (source) ? mxConstants.STYLE_SOURCE_PORT : mxConstants.STYLE_TARGET_PORT;
var id = edge.style[key];
var port = terminal.shape.getPorts()[id];
// TODO: Add support for rotation, direction
if (port != null)
{
return port.constraint;
}
return mxUtilsGetPortConstraints.apply(this, arguments);
};
// Connect preview
graph.connectionHandler.createEdgeState = function(me)
{
var edge = graph.createEdge(null, null, null, null, null);
return new mxCellState(this.graph.view, edge, this.graph.getCellStyle(edge));
};
*/
};
</script>
</head>
<!-- 页面载入时启动程序 -->
<body onload="main(document.getElementById('graphContainer'))">
<!-- 创建带网格壁纸和曲线的一个容器 -->
<div id="graphContainer"
style="overflow:hidden;position:relative;width:321px;height:241px;background:url('editors/images/grid.gif');cursor:default;">
</div>
</body>
</html>