Hi. It is possible to get the key of the object before adding it to diagram. I am using clickCreatingTool to add shape on diagram. I want to get the key first before adding it to the diagram
I assume you are asking about how to specify the automatic assignment of node data keys in the model.
You just need to supply a function as the value of your model’s Model | GoJS API property.
Can you give me an example on how to use that
Here are two samples that make use of makeUniqueKeyFunction:
An extra example, showing how to make sure all new node keys have values > 1000000:
function bigUniqueId(model, data) {
if (data.key === undefined || model.findNodeDataForKey(data.key) !== null) {
var k = 1000000 + model.nodeDataArray.length;
while (model.findNodeDataForKey(k) !== null) k++;
return k;
}
}
myDiagram.model = $(go.GraphLinksModel, {
. . .,
makeUniqueKeyFunction: bigUniqueId,
nodeDataArray: ...Array...,
linkDataArray: ...Array...
});
This is such a big help. Thanks for the support.