gojs
Version:
Interactive diagrams, charts, and graphs, such as trees, flowcharts, orgcharts, UML, BPMN, or business diagrams
213 lines (198 loc) • 9.45 kB
HTML
<html>
<head>
<meta charset="UTF-8">
<title>State Chart with Simple Curved Link Reshaping</title>
<meta name="description" content="Changing the curviness of a link using a single reshaping handle." />
<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 src="CurvedLinkReshapingTool.js"></script>
<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", // must name or refer to the DIV HTML element
{
// have mouse wheel events zoom in and out instead of scroll up and down
"toolManager.mouseWheelBehavior": go.ToolManager.WheelZoom,
// support double-click in background creating a new node
"clickCreatingTool.archetypeNodeData": { text: "new node" },
"linkReshapingTool": new CurvedLinkReshapingTool(),
// enable undo & redo
"undoManager.isEnabled": true
});
// when the document is modified, add a "*" to the title and enable the "Save" button
myDiagram.addDiagramListener("Modified", function(e) {
var button = document.getElementById("SaveButton");
if (button) button.disabled = !myDiagram.isModified;
var idx = document.title.indexOf("*");
if (myDiagram.isModified) {
if (idx < 0) document.title += "*";
} else {
if (idx >= 0) document.title = document.title.substr(0, idx);
}
});
// define the Node template
myDiagram.nodeTemplate =
$(go.Node, "Auto",
new go.Binding("location", "loc", go.Point.parse).makeTwoWay(go.Point.stringify),
// define the node's outer shape, which will surround the TextBlock
$(go.Shape, "RoundedRectangle",
{
parameter1: 20, // the corner has a large radius
fill: $(go.Brush, "Linear", { 0: "rgb(254, 201, 0)", 1: "rgb(254, 162, 0)" }),
stroke: "black",
portId: "",
fromLinkable: true,
fromLinkableSelfNode: true,
fromLinkableDuplicates: true,
toLinkable: true,
toLinkableSelfNode: true,
toLinkableDuplicates: true,
cursor: "pointer"
}),
$(go.TextBlock,
{
font: "bold 11pt helvetica, bold arial, sans-serif",
editable: true // editing the text automatically updates the model data
},
new go.Binding("text", "text").makeTwoWay())
);
// unlike the normal selection Adornment, this one includes a Button
myDiagram.nodeTemplate.selectionAdornmentTemplate =
$(go.Adornment, "Spot",
$(go.Panel, "Auto",
$(go.Shape, { fill: null, stroke: "blue", strokeWidth: 2 }),
$(go.Placeholder) // this represents the selected Node
),
// the button to create a "next" node, at the top-right corner
$("Button",
{
alignment: go.Spot.TopRight,
click: addNodeAndLink // this function is defined below
},
$(go.Shape, "PlusLine", { desiredSize: new go.Size(6, 6) })
) // end button
); // end Adornment
// clicking the button inserts a new node to the right of the selected node,
// and adds a link to that new node
function addNodeAndLink(e, obj) {
var adorn = obj.part;
e.handled = true;
var diagram = adorn.diagram;
diagram.startTransaction("Add State");
// get the node data for which the user clicked the button
var fromNode = adorn.adornedPart;
var fromData = fromNode.data;
// create a new "State" data object, positioned off to the right of the adorned Node
var toData = { text: "new" };
var p = fromNode.location.copy();
p.x += 200;
toData.loc = go.Point.stringify(p); // the "loc" property is a string, not a Point object
// add the new node data to the model
var model = diagram.model;
model.addNodeData(toData);
// create a link data from the old node data to the new node data
var linkdata = {
from: model.getKeyForNodeData(fromData), // or just: fromData.id
to: model.getKeyForNodeData(toData),
text: "transition"
};
// and add the link data to the model
model.addLinkData(linkdata);
// select the new Node
var newnode = diagram.findNodeForData(toData);
diagram.select(newnode);
diagram.commitTransaction("Add State");
// if the new node is off-screen, scroll the diagram to show the new node
diagram.scrollToRect(newnode.actualBounds);
}
// replace the default Link template in the linkTemplateMap
myDiagram.linkTemplate =
$(go.Link, // the whole link panel
{ curve: go.Link.Bezier, reshapable: true },
// don't need to save Link.points, so don't need TwoWay Binding on "points"
new go.Binding("curviness", "curviness").makeTwoWay(), // but save "curviness" automatically
$(go.Shape, // the link shape
{ strokeWidth: 1.5 }),
$(go.Shape, // the arrowhead
{ toArrow: "standard", stroke: null }),
$(go.Panel, "Auto",
$(go.Shape, // the label background, which becomes transparent around the edges
{
fill: $(go.Brush, "Radial",
{ 0: "rgb(240, 240, 240)", 0.3: "rgb(240, 240, 240)", 1: "rgba(240, 240, 240, 0)" }),
stroke: null
}),
$(go.TextBlock, "transition", // the label text
{
textAlign: "center",
font: "10pt helvetica, arial, sans-serif",
stroke: "black",
margin: 4,
editable: true // editing the text automatically updates the model data
},
new go.Binding("text", "text").makeTwoWay())
)
);
// read in the JSON-format data from the "mySavedModel" element
load();
}
// Show the diagram's model in JSON format
function save() {
document.getElementById("mySavedModel").value = myDiagram.model.toJson();
myDiagram.isModified = false;
}
function load() {
myDiagram.model = go.Model.fromJson(document.getElementById("mySavedModel").value);
}
</script>
</head>
<body onload="init()">
<div id="sample">
<div id="myDiagramDiv" style="background-color: whitesmoke; border: solid 1px black; width: 100%; height: 400px"></div>
<p>
This sample is a modification of the <a href="../samples/stateChart.html">State Chart</a> sample
that makes use of the CurvedLinkReshapingTool that is defined in its own file, as <a href="CurvedLinkReshapingTool.js">CurvedLinkReshapingTool.js</a>.
</p>
<p>
Note that unlike the standard case of a Bezier-curved Link that is <a>Part.reshapable</a>, there is only one reshape handle
When the user drags that handle, the value of <a>Link.curviness</a> is modified, causing the link to be curved differently.
This sample also defines a TwoWay <a>Binding</a> on that property, thereby saving the curviness to the model data.
Unlike the regular State Chart sample, there is no Binding on <a>Link.points</a>, which is no longer needed when the curviness is the only modified property.
</p>
<button id="SaveButton" onclick="save()">Save</button>
<button onclick="load()">Load</button>
Diagram Model saved in JSON format:
<br />
<textarea id="mySavedModel" style="width:100%;height:300px">
{ "class": "go.GraphLinksModel",
"nodeKeyProperty": "id",
"nodeDataArray": [
{ "id": 0, "loc": "120 120", "text": "Initial" },
{ "id": 1, "loc": "330 120", "text": "First down" },
{ "id": 2, "loc": "226 376", "text": "First up" },
{ "id": 3, "loc": "60 276", "text": "Second down" },
{ "id": 4, "loc": "226 226", "text": "Wait" }
],
"linkDataArray": [
{ "from": 0, "to": 0, "text": "up or timer", "curviness": -20 },
{ "from": 0, "to": 1, "text": "down", "curviness": 20 },
{ "from": 1, "to": 0, "text": "up (moved)\nPOST", "curviness": 20 },
{ "from": 1, "to": 1, "text": "down", "curviness": -20 },
{ "from": 1, "to": 2, "text": "up (no move)" },
{ "from": 1, "to": 4, "text": "timer" },
{ "from": 2, "to": 0, "text": "timer\nPOST" },
{ "from": 2, "to": 3, "text": "down" },
{ "from": 3, "to": 0, "text": "up\nPOST\n(dblclick\nif no move)" },
{ "from": 3, "to": 3, "text": "down or timer", "curviness": 20 },
{ "from": 4, "to": 0, "text": "up\nPOST" },
{ "from": 4, "to": 4, "text": "down" }
]
}
</textarea></div>
</body>
</html>