Port constraints aren't working in some cases

Question

Port constraints aren't working when diagram.drawOnce() method is called to draw a connector

from one node port to other node's port

I wanted to use port constraints to make sure connector is not connecting between two input or output ports

Aravind Ravi · Answer

Hi Sunil, 

We have created a sample to draw connector from port. Instead of using  the drawing tools to draw connector use port draw to draw connector from one port to another port. Set port constraints as Draw so that you can be able to draw connector from port if you hover on port. To connect the connector only on node port, disable node InConnect and OutConnect constraints from node constraints. So that we cannot able to connect on node while draw connector from port. Please find the below code snippet for how to disable node constraints and how to set port constraints 





constraints: NodeConstraints.Default & ~(NodeConstraints.InConnect | NodeConstraints.OutConnect), 
    ports: [{ 
        id: 'port2', height: 10, width: 10, offset: { x: 0, y: 0.5 }, constraints: (PortConstraints.Default & PortConstraints.InConnect)| PortConstraints.Draw, 
        visibility: PortVisibility.Visible 
    }] 

We have attached a sample for your reference. Please find the sample in below link 

Sample: https://www.syncfusion.com/downloads/support/forum/154741/ze/Port-Constraints151061981 

Regards 
Aravind Ravi