我使用默认链接,我想限制来自链接的来源和目标,因为我只想要rect(source)
和circle(target)
之间的链接。
我已经使用link.on(change:source)
和link.on(change:target)
进行了尝试,但这些事件并非在我想要的时候启动。
有人知道这个问题的解决方案吗?
var defaultLinks = new joint.dia.Link({
attrs: {
'.marker-source': {transform: 'scale(0.001)' },
'.marker-target': {fill:'black', d: 'M 10 0 L 0 5 L 10 10 z' },
'.connection-wrap': {
stroke: 'black'
}
},
smooth:true,
path: []
});
defaultLinks.on('change:source',function(){
alert("change source")
});
defaultLinks.on('change:target',function(){
alert("change source")
});
this.paper = new joint.dia.Paper({
el: this.paperScroller.el,
width: 1200,
height: 1000,
gridSize: 10,
perpendicularLinks: true,
model: this.graph,
defaultLink: defaultLinks
});
答案 0 :(得分:4)
您可以使用纸张选项(http://jointjs.com/api#joint.dia.Paper)中的validateConnection(cellViewS, magnetS, cellViewT, magnetT, end, linkView)
功能。本教程介绍了用法:http://jointjs.com/tutorial/ports#restrict。在您的情况下,您将使用类似(未经测试)的内容:
var paper = new joint.dia.Paper({
validateConnection: function(cellViewS, magnetS, cellViewT, magnetT, end, linkView) {
// Only rectangle can be the source, if it is not, we do not allow such connection:
if (cellViewS.model.get('type') !== 'basic.Rect') return false;
// Only circle can be the target, if it is not, we do not allow such a connection:
if (cellViewT.model.get('type') !== 'basic.Circle') return false;
// Connection is allowed otherwise.
return true;
},
...
})