I want to catch drawing link event before the drawing has finished

GoJS
1

i want to catch drawing link event before the drawing has finished.
And how to cancel drawing link event?

2

That depends on when and how often you want to do something. In general you will want to override LinkingTool methods. Perhaps override LinkingTool | GoJS API ?

To cancel the operation of any tool, call Tool.doCancel() on the Diagram.currentTool.

3

ok.i will try to override LinkingTool.

I have anothor question : When I edit node data ,the model data will update,but the page displaying won’t update.
@walter

4

I have used makeTwoWay method binding to ‘text’.

5

i have solved . use node.updateTargetBindings() method

6

@walter insertLink need to return a Link. Can you help me revise my code .

myDiagram.toolManager.linkingTool.insertLink=function(fromnode, fromport, tonode, toport){
console.log(fromnode);
return new $go.Link(){
fromNode:fromnode,
fromport:fromport,
tonode:tonode,
toport:toport
};
}

7

In overriding LinkingTool.insertLink I was expecting that you would call the base method, perhaps modifying LinkingTool.archetypeLinkData first, and then return what it returns.

It is impractical to create a Link that works well being a data bound and modeled. It is much easier either calling the base method or calling GraphLinksModel.copyLinkData and GraphLinksModel.addLinkData.