gojs
Version:
Interactive diagrams, charts, and graphs, such as trees, flowcharts, orgcharts, UML, BPMN, or business diagrams
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HTML
<html>
<head>
<meta charset="UTF-8">
<title>Mapping Selectable Fields of Records</title>
<meta name="description" content="Support selecting items inside nodes." />
<meta name="viewport" content="width=device-width, initial-scale=1">
<!-- Copyright 1998-2020 by Northwoods Software Corporation. -->
<script src="../release/go.js"></script>
<script src="../assets/js/goSamples.js"></script> <!-- this is only for the GoJS Samples framework -->
<script id="code">
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",
{
validCycle: go.Diagram.CycleNotDirected, // don't allow loops
// For this sample, automatically show the state of the diagram's model on the page
"ModelChanged": function(e) {
if (e.isTransactionFinished) showModel();
},
"undoManager.isEnabled": true
});
// This template is a Panel that is used to represent each item in a Panel.itemArray.
// The Panel is data bound to the item object.
var fieldTemplate =
$(go.Panel, "TableRow", // this Panel is a row in the containing Table
new go.Binding("portId", "name"), // this Panel is a "port"
{
background: "transparent", // so this port's background can be picked by the mouse
fromSpot: go.Spot.LeftRightSides, // links only go from the right side to the left side
toSpot: go.Spot.LeftRightSides,
// allow drawing links from or to this port:
fromLinkable: true, toLinkable: true
},
{ // allow the user to select items -- the background color indicates whether "selected"
//?? maybe this should be more sophisticated than simple toggling of selection
click: function(e, item) {
// assume "transparent" means not "selected", for items
var oldskips = item.diagram.skipsUndoManager;
item.diagram.skipsUndoManager = true;
if (item.background === "transparent") {
item.background = "dodgerblue";
} else {
item.background = "transparent";
}
item.diagram.skipsUndoManager = oldskips;
}
},
$(go.Shape,
{
width: 12, height: 12, column: 0, strokeWidth: 2, margin: 4,
// but disallow drawing links from or to this shape:
fromLinkable: false, toLinkable: false
},
new go.Binding("figure", "figure"),
new go.Binding("fill", "color")),
$(go.TextBlock,
{
margin: new go.Margin(0, 2), column: 1, font: "bold 13px sans-serif",
// and disallow drawing links from or to this text:
fromLinkable: false, toLinkable: false
},
new go.Binding("text", "name")),
$(go.TextBlock,
{ margin: new go.Margin(0, 2), column: 2, font: "13px sans-serif" },
new go.Binding("text", "info"))
);
// This template represents a whole "record".
myDiagram.nodeTemplate =
$(go.Node, "Auto",
new go.Binding("location", "loc", go.Point.parse).makeTwoWay(go.Point.stringify),
// this rectangular shape surrounds the content of the node
$(go.Shape,
{ fill: "#EEEEEE" }),
// the content consists of a header and a list of items
$(go.Panel, "Vertical",
// this is the header for the whole node
$(go.Panel, "Auto",
{ stretch: go.GraphObject.Horizontal }, // as wide as the whole node
$(go.Shape,
{ fill: "#1570A6", stroke: null }),
$(go.TextBlock,
{
alignment: go.Spot.Center,
margin: 3,
stroke: "white",
textAlign: "center",
font: "bold 12pt sans-serif"
},
new go.Binding("text", "key"))),
// this Panel holds a Panel for each item object in the itemArray;
// each item Panel is defined by the itemTemplate to be a TableRow in this Table
$(go.Panel, "Table",
{
name: "TABLE",
padding: 2,
minSize: new go.Size(100, 10),
defaultStretch: go.GraphObject.Horizontal,
itemTemplate: fieldTemplate
},
new go.Binding("itemArray", "fields")
) // end Table Panel of items
) // end Vertical Panel
); // end Node
myDiagram.linkTemplate =
$(go.Link,
{ relinkableFrom: true, relinkableTo: true, toShortLength: 4 }, // let user reconnect links
$(go.Shape, { strokeWidth: 1.5 }),
$(go.Shape, { toArrow: "Standard", stroke: null })
);
myDiagram.model =
$(go.GraphLinksModel,
{
copiesArrays: true,
copiesArrayObjects: true,
linkFromPortIdProperty: "fromPort",
linkToPortIdProperty: "toPort",
nodeDataArray: [
{
key: "Record1",
fields: [
{ name: "field1", info: "", color: "#F7B84B", figure: "Ellipse" },
{ name: "field2", info: "the second one", color: "#F25022", figure: "Ellipse" },
{ name: "fieldThree", info: "3rd", color: "#00BCF2" }
],
loc: "0 0"
},
{
key: "Record2",
fields: [
{ name: "fieldA", info: "", color: "#FFB900", figure: "Diamond" },
{ name: "fieldB", info: "", color: "#F25022", figure: "Rectangle" },
{ name: "fieldC", info: "", color: "#7FBA00", figure: "Diamond" },
{ name: "fieldD", info: "fourth", color: "#00BCF2", figure: "Rectangle" }
],
loc: "250 0"
}
],
linkDataArray: [
{ from: "Record1", fromPort: "field1", to: "Record2", toPort: "fieldA" },
{ from: "Record1", fromPort: "field2", to: "Record2", toPort: "fieldD" },
{ from: "Record1", fromPort: "fieldThree", to: "Record2", toPort: "fieldB" }
]
});
// this is a bit inefficient, but should be OK for normal-sized graphs with reasonable numbers of items per node
function findAllSelectedItems() {
var items = [];
for (var nit = myDiagram.nodes; nit.next();) {
var node = nit.value;
var table = node.findObject("TABLE");
if (table) {
for (var iit = table.elements; iit.next();) {
var itempanel = iit.value;
if (itempanel.background !== "transparent") items.push(itempanel);
}
}
}
return items;
}
// Override the standard CommandHandler deleteSelection behavior.
// If there are any selected items, delete them instead of deleting any selected nodes or links.
myDiagram.commandHandler.canDeleteSelection = function() {
// true if there are any selected deletable nodes or links,
// or if there are any selected items within nodes
return go.CommandHandler.prototype.canDeleteSelection.call(myDiagram.commandHandler) ||
findAllSelectedItems().length > 0;
};
myDiagram.commandHandler.deleteSelection = function() {
var items = findAllSelectedItems();
if (items.length > 0) { // if there are any selected items, delete them
myDiagram.startTransaction("delete items");
for (var i = 0; i < items.length; i++) {
var panel = items[i];
var nodedata = panel.part.data;
var itemarray = nodedata.fields;
var itemdata = panel.data;
var itemindex = itemarray.indexOf(itemdata);
myDiagram.model.removeArrayItem(itemarray, itemindex);
}
myDiagram.commitTransaction("delete items");
} else { // otherwise just delete nodes and/or links, as usual
go.CommandHandler.prototype.deleteSelection.call(myDiagram.commandHandler);
}
};
showModel(); // show the diagram's initial model
function showModel() {
document.getElementById("mySavedModel").textContent = myDiagram.model.toJson();
}
}
</script>
</head>
<body onload="init()">
<div id="sample">
<div id="myDiagramDiv" style="border: solid 1px black; width:100%; height:300px"></div>
<p>This shows a variable number of selectable "fields" for each "record".</p>
<p>Draw new links by dragging from the background of any field.
Reconnect a selected link by dragging its diamond-shaped handle.
The user can delete a selected field.</p>
<p>The model data, automatically updated after each change or undo or redo:</p>
<textarea id="mySavedModel" style="width:100%;height:300px"></textarea>
<p>This sample was derived from the <a href="records.html">Records</a> sample.</p>
</div>
</body>
</html>