Or maybe not… Setting Link.adjusting to End makes links behave in ways we don’t really want. Below is a modified version of the script in the basic example. If you adjust the link between Alpha and Gamma and then rename Alpha, you should see that
- if the name change is narrower than the width of the Alpha rectangle, the link remains where it is
- if the name change is wider than the width of the Alpha rectangle, the link is re-routed
This suggests to me the linking is taking note of the changed dimensions of the node, rather than the rectangle shape
`function init() {
if (window.goSamples) goSamples(); // init for these samples – you don’t need to call this
var $ = go.GraphObject.make; // for conciseness in defining templates
myDiagram =
$(go.Diagram, "myDiagramDiv", // create a Diagram for the DIV HTML element
{
// position the graph in the middle of the diagram
initialContentAlignment: go.Spot.Center,
// allow double-click in background to create a new node
"clickCreatingTool.archetypeNodeData": { text: "Node", color: "white" },
// allow Ctrl-G to call groupSelection()
"commandHandler.archetypeGroupData": { text: "Group", isGroup: true, color: "blue" },
// enable undo & redo
"undoManager.isEnabled": true
});
// Define the appearance and behavior for Nodes:
// These nodes have text surrounded by a rounded rectangle
// whose fill color is bound to the node data.
// The user can drag a node by dragging its TextBlock label.
// Dragging from the Shape will start drawing a new link.
myDiagram.nodeTemplate =
$(go.Node, "Vertical",
{
locationSpot: go.Spot.Center,
locationObjectName: "SHAPE",
selectionObjectName: "SHAPE",
resizeObjectName: "SHAPE",
movable: true,
resizable: true
},
$(go.Shape, "RoundedRectangle",
{
name: "SHAPE",
fill: "white", // the default fill, if there is no data bound value
portId: "", cursor: "pointer", // the Shape is the port, not the whole Node
// allow all kinds of links from and to this port
fromLinkable: true, fromLinkableSelfNode: true, fromLinkableDuplicates: true,
toLinkable: true, toLinkableSelfNode: true, toLinkableDuplicates: true
},
new go.Binding("fill", "color")
),
$(go.TextBlock,
{
font: "bold 14px sans-serif",
stroke: '#333',
margin: 6, // make some extra space for the shape around the text
isMultiline: false, // don't allow newlines in text
editable: true // allow in-place editing by user
},
new go.Binding("text", "text").makeTwoWay()
)
);
// Define the appearance and behavior for Links:
function linkInfo(d) { // Tooltip info for a link data object
return "Link:\nfrom " + d.from + " to " + d.to;
}
// The link shape and arrowhead have their stroke brush data bound to the "color" property
myDiagram.linkTemplate =
$(go.Link,
{ toShortLength: 3,
relinkableFrom: true,
relinkableTo: true,
reshapable: true,
routing: go.Link.AvoidsNodes
}, // allow the user to relink existing links
$(go.Shape,
{ strokeWidth: 2 },
new go.Binding("stroke", "color")),
$(go.Shape,
{ toArrow: "Standard", stroke: null },
new go.Binding("fill", "color"))
);
// Define the appearance and behavior for Groups:
function groupInfo(adornment) { // takes the tooltip or context menu, not a group node data object
var g = adornment.adornedPart; // get the Group that the tooltip adorns
var mems = g.memberParts.count;
var links = 0;
g.memberParts.each(function(part) {
if (part instanceof go.Link) links++;
});
return "Group " + g.data.key + ": " + g.data.text + "\n" + mems + " members including " + links + " links";
}
// Groups consist of a title in the color given by the group node data
// above a translucent gray rectangle surrounding the member parts
myDiagram.groupTemplate =
$(go.Group, "Vertical",
{ selectionObjectName: "PANEL", // selection handle goes around shape, not label
ungroupable: true }, // enable Ctrl-Shift-G to ungroup a selected Group
$(go.TextBlock,
{
font: "bold 19px sans-serif",
isMultiline: false, // don't allow newlines in text
editable: true // allow in-place editing by user
},
new go.Binding("text", "text").makeTwoWay(),
new go.Binding("stroke", "color")),
$(go.Panel, "Auto",
{ name: "PANEL" },
$(go.Shape, "Rectangle", // the rectangular shape around the members
{
fill: "rgba(128,128,128,0.2)", stroke: "gray", strokeWidth: 3,
portId: "", cursor: "pointer", // the Shape is the port, not the whole Node
// allow all kinds of links from and to this port
fromLinkable: true, fromLinkableSelfNode: true, fromLinkableDuplicates: true,
toLinkable: true, toLinkableSelfNode: true, toLinkableDuplicates: true
}),
$(go.Placeholder, { margin: 10, background: "transparent" }) // represents where the members are
),
{ // this tooltip Adornment is shared by all groups
toolTip:
$(go.Adornment, "Auto",
$(go.Shape, { fill: "#FFFFCC" }),
$(go.TextBlock, { margin: 4 },
// bind to tooltip, not to Group.data, to allow access to Group properties
new go.Binding("text", "", groupInfo).ofObject())
)
}
);
// Define the behavior for the Diagram background:
// Create the Diagram's Model:
var nodeDataArray = [
{ key: 1, text: "Alpha", color: "lightblue" },
{ key: 2, text: "Beta", color: "orange" },
{ key: 3, text: "Gamma", color: "lightgreen", group: 5 },
{ key: 4, text: "Delta", color: "pink", group: 5 },
{ key: 5, text: "Epsilon", color: "green", isGroup: true }
];
var linkDataArray = [
{ from: 1, to: 2, color: "blue" },
{ from: 2, to: 2 },
{ from: 3, to: 4, color: "green" },
{ from: 3, to: 1, color: "purple" }
];
myDiagram.model = new go.GraphLinksModel(nodeDataArray, linkDataArray);
}`