How to restrict the child node dragging whereas allow group dragging
To create a group node, leverage the children property of the node. Here's a code sample illustrating the creation of a group node along with its child nodes:
var nodes = [
{
id: "node1",
width: 50,
height: 50,
offsetX: 100,
offsetY: 100,
annotations: [{ content: "Seat1" }]
},
{
id: "node2",
width: 50,
height: 50,
offsetX: 200,
offsetY: 100,
annotations: [{ content: "Seat2" }]
},
{
id: "node3",
width: 50,
height: 50,
offsetX: 100,
offsetY: 200,
annotations: [{ content: "Seat3" }]
},
{
id: "node4",
width: 50,
height: 50,
offsetX: 200,
offsetY: 200,
annotations: [{ content: "Seat4" }]
},
{
id: "group", children: ['node1', 'node2', 'node3', 'node4']
},
];//To disable drag constraints for child nodes in group node
function selectionChange(args) {
let node;
if ((args.newValue[0]) && (args.newValue[0]).children !== undefined) {
const group = args.newValue[0];
if (group.children) {
group.constraints = ej.diagrams.NodeConstraints.Default
for (var i = 0; i < group.children.length; i++) {
node = diagram.getObject(group.children[i]);
if (node.constraints) {
node.constraints = ej.diagrams.NodeConstraints.Default;
}
}
}
} else if (!(args.newValue[0].children)) {
(args.newValue[0]).constraints = ej.diagrams.NodeConstraints.Select | ej.diagrams.NodeConstraints.Drag;
}
}Refer to the working sample for additional details and implementation: Sample
Conclusion
We hope you enjoyed learning about how to restrict the child node dragging, whereas allowing group dragging.
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