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index.html
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index.html
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<!doctype html>
<html lang="en">
<head>
<meta charset="UTF-8" />
<link rel="icon" href="data:image/x-icon;base64,AA" />
<meta name="viewport" content="width=device-width" />
<title>flow-view</title>
<meta name="description" content="is a visual editor for Dataflow programming" />
<link rel="stylesheet" href="./style.css" />
</head>
<body>
<main>
<h1>flow-view</h1>
<blockquote>is a visual editor for <em>dataflow programming</em></blockquote>
<ul>
<li>Drag on canvas to translate all items.</li>
<li>Click on item to select it.</li>
<li>Click while pressing <kbd>SHIFT</kbd> to enable <b>multi</b> selection.</li>
<li>Drag from a node output to a node input to create an edge.</li>
<li>Drag selected items to translate them.</li>
<li>Press <kbd>BACKSPACE</kbd> to delete selected items.</li>
<li>Double click on edge to delete it.</li>
<li>Double click on canvas to open the <b>selector</b>.</li>
<li>Type into the selector then press <kbd>ENTER</kbd> to create a new node.</li>
</ul>
<div class="container"></div>
<div class="controls">
<button id="reset">Reset</button>
<button id="clear">Clear</button>
<button id="save">Save</button>
</div>
<a hidden href="" id="download" download="graph.json"></a>
<section>
<h2>examples</h2>
<ul>
<li><a href="./examples/programmatic/demo.html">programmatic</a></li>
<li><a href="./examples/color-schemes/demo.html">color schemes</a></li>
<li><a href="./examples/custom-node/demo.html">custom node</a></li>
<li><a href="./examples/full-page/demo.html">full page</a></li>
</ul>
</section>
</main>
<script type="module">
// import { FlowView } from 'https://unpkg.com/flow-view';
import { FlowView, FlowViewNode } from "./index.js"
const flowView = new FlowView(document.querySelector(".container"))
flowView.addNodeDefinitions({
nodes: [
{ name: "Marge", type: "parent" },
{ name: "Homer", type: "parent" },
{ name: "Bart", type: "child" },
{ name: "Lisa", type: "child" },
{ name: "Barney" },
{ name: "Milhouse", type: "child" },
{ name: "Moe" },
{ name: "Ned", type: "parent" },
{ name: "Patty" },
{ name: "Ralph", type: "child" },
{ name: "Selma" },
{ name: "Mr. Burns" }
],
types: {
child: {
inputs: [{ name: "in1" }, { name: "in2" }],
outputs: []
}
}
})
flowView.onChange(({ action, data }) => {
switch (action) {
case "CREATE_NODE": {
const node = flowView.node(data.id)
switch (data.type) {
case "parent": {
if (node.outputs.length === 0) {
node.newOutput({ name: "out" })
}
break
}
default:
break
}
}
default:
console.info(action, data)
}
})
const initialGraph = {
nodes: [
{
id: "dad",
text: "Homer",
x: 60,
y: 70,
outs: [{ id: "children", name: "out" }]
},
{
id: "mom",
text: "Marge",
x: 160,
y: 70,
outs: [{ id: "children", name: "out" }]
},
{
id: "son",
text: "Bart",
x: 60,
y: 240,
ins: [
{ id: "father", name: "in1" },
{ id: "mother", name: "in2" }
]
},
{
id: "daughter",
text: "Lisa",
x: 220,
y: 220,
ins: [
{ id: "father", name: "in1" },
{ id: "mother", name: "in2" }
]
}
],
edges: [
{ from: ["dad", "children"], to: ["son", "father"] },
{ from: ["dad", "children"], to: ["daughter", "father"] },
{ from: ["mom", "children"], to: ["son", "mother"] },
{ from: ["mom", "children"], to: ["daughter", "mother"] }
]
}
flowView.loadGraph(initialGraph)
// Few tests.
try {
console.info("not a node", flowView.node("xxx"))
} catch (error) {
console.info("THIS IS A TEST:", error.message)
}
try {
console.info("not an edge", flowView.edge("xxx"))
} catch (error) {
console.info("THIS IS A TEST:", error.message)
}
console.info("Homer node", flowView.node("dad"))
flowView.graph.edges.slice(0, 1).forEach(({ id }) => {
console.info("First edge", flowView.edge(id))
})
// Controls
const resetButton = document.querySelector("button#reset")
resetButton.addEventListener("click", () => {
flowView.clearGraph()
flowView.loadGraph(initialGraph)
})
const clearButton = document.querySelector("button#clear")
clearButton.addEventListener("click", () => {
flowView.clearGraph()
})
const downloadGraph = document.querySelector("a#download")
const saveButton = document.querySelector("button#save")
saveButton.addEventListener("click", () => {
downloadGraph.setAttribute(
"href",
`data:text/json;charset=utf-8,${encodeURIComponent(JSON.stringify(flowView.graph))}`
)
downloadGraph.click()
})
</script>
<footer>GitHub: <a href="https://github.com/fibo/flow-view">fibo/flow-view</a></footer>
</body>
</html>