gojs
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Interactive diagrams, charts, and graphs, such as trees, flowcharts, orgcharts, UML, BPMN, or business diagrams
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<meta charset="utf-8"/>
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<meta name="description" content="When a diagram node is selected show a selection Adornment holding buttons on which a click invokes a command or a drag starts a tool"/>
<link rel="stylesheet" href="../assets/css/style.css"/>
<!-- Copyright 1998-2023 by Northwoods Software Corporation. -->
<title>Buttons in a Circular Adornment</title>
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<body>
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<h1 class="my-0 p-1 ">GoJS</h1>
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<!-- Start of GoJS sample code -->
<script src="../release/go.js"></script>
<div id="allSampleContent" class="p-4 w-full">
<script id="code">
// Produce a "Button" that is shaped as the intersection of a circular sector and an annular ring.
// The first argument is the angle at which the button will be placed relative to the center.
// The second argument is the sweep angle over which the button will extend;
// by default this is 90 degrees, as if there are exactly four buttons around the whole circle.
go.GraphObject.defineBuilder("SectorButton", args => {
var angle = go.GraphObject.takeBuilderArgument(args, 0.0, a => typeof a === "number");
var sweep = go.GraphObject.takeBuilderArgument(args, 90.0, a => typeof a === "number");
// default brushes for "Button" shape
var buttonFillNormal = "whitesmoke";
var buttonStrokeNormal = "gray";
var buttonFillOver = "dodgerblue";
var buttonStrokeOver = "blue";
var buttonFillDisabled = "darkgray";
function makeAnnularWedge(angle, sweep, outer, inner) {
// the Geometry will be centered about (0,0)
var p = new go.Point(outer, 0).rotate(angle - sweep / 2);
var q = new go.Point(inner, 0).rotate(angle + sweep / 2);
var geo = new go.Geometry()
.add(new go.PathFigure(-outer, -outer)) // always make sure the Geometry includes the top left corner
.add(new go.PathFigure(outer, outer)) // and the bottom right corner of the whole circular area
.add(new go.PathFigure(p.x, p.y) // start at outer corner, go clockwise
.add(new go.PathSegment(go.PathSegment.Arc, angle - sweep / 2, sweep, 0, 0, outer, outer))
.add(new go.PathSegment(go.PathSegment.Line, q.x, q.y)) // to opposite inner corner, then anticlockwise
.add(new go.PathSegment(go.PathSegment.Arc, angle + sweep / 2, -sweep, 0, 0, inner, inner).close()));
return geo;
}
var geo = makeAnnularWedge(angle, sweep, 80, 40);
var pt = new go.Point(60, 0).rotate(angle);
var align = new go.Spot(0.5, 0.5, pt.x, pt.y);
args.forEach(obj => { if (obj instanceof go.GraphObject) obj.alignment = align; });
var button =
go.GraphObject.make(go.Panel, "Spot",
{
isActionable: true, // needed so that the ActionTool intercepts mouse events
enabledChanged: (button, enabled) => {
const shape = button.findObject("ButtonBorder");
if (shape !== null) {
shape.fill = enabled ? button["_buttonFillNormal"] : button["_buttonFillDisabled"];
}
},
// save these values for the mouseEnter and mouseLeave event handlers
"_buttonFillNormal": buttonFillNormal,
"_buttonStrokeNormal": buttonStrokeNormal,
"_buttonFillOver": buttonFillOver,
"_buttonStrokeOver": buttonStrokeOver,
"_buttonFillDisabled": buttonFillDisabled
},
go.GraphObject.make(go.Shape, // the border
{
name: "ButtonBorder",
fill: buttonFillNormal,
stroke: buttonStrokeNormal,
geometry: geo
})
);
// There's no GraphObject inside the button shape -- it must be added as part of the button definition.
// This way the object could be a TextBlock or a Shape or a Picture or arbitrarily complex Panel.
// mouse-over behavior
button.mouseEnter = (e, button, prev) => {
var shape = button.findObject("ButtonBorder"); // the border Shape
if (shape instanceof go.Shape) {
var brush = button["_buttonFillOver"];
button["_buttonFillNormal"] = shape.fill;
shape.fill = brush;
brush = button["_buttonStrokeOver"];
button["_buttonStrokeNormal"] = shape.stroke;
shape.stroke = brush;
}
};
button.mouseLeave = (e, button, prev) => {
var shape = button.findObject("ButtonBorder"); // the border Shape
if (shape instanceof go.Shape) {
shape.fill = button["_buttonFillNormal"];
shape.stroke = button["_buttonStrokeNormal"];
}
};
return button;
});
function init() {
if (window.goSamples) goSamples(); // init for these samples -- you don't need to call this
// Since 2.2 you can also author concise templates with method chaining instead of GraphObject.make
// For details, see https://gojs.net/latest/intro/buildingObjects.html
const $ = go.GraphObject.make;
myDiagram =
new go.Diagram("myDiagramDiv",
{ // show the selection Adornment only on the first selection if it is a Node
"ChangedSelection": e => {
var node = e.diagram.selection.first();
if (node === null) {
var oldnode = selectionAdornment.adornedPart;
if (oldnode) oldnode.removeAdornment("Radial");
selectionAdornment.adornedObject = null;
} else if (node instanceof go.Node) {
selectionAdornment.adornedObject = node;
node.addAdornment("Radial", selectionAdornment);
}
},
"InitialLayoutCompleted": e => {
// show the adornment on the "Beta" node
e.diagram.select(e.diagram.findNodeForKey(2));
},
"undoManager.isEnabled": true
});
myDiagram.nodeTemplate =
$(go.Node, "Auto",
{ resizable: true },
new go.Binding("desiredSize", "size", go.Size.parse).makeTwoWay(go.Size.stringify),
$(go.Shape,
{ portId: "", fromLinkable: true, toLinkable: true, cursor: "pointer" },
new go.Binding("fill", "color")),
$(go.TextBlock,
{ margin: 8, editable: true },
new go.Binding("text").makeTwoWay())
);
// Show a radial Adornment holding buttons when a node is selected.
// This is not a template, so there is only one instance of it that can be shown at a time.
// If you want every selected node to have their own copy of this adornment,
// set Node.selectionAdornmentTemplate to this and remove the "ChangedSelection" DiagramEvent listener.
var selectionAdornment =
$(go.Adornment, "Spot",
{ layerName: "Tool" }, // so that it's in front of other Adornments
$(go.Panel, "Auto",
$(go.Shape, { fill: null, stroke: "dodgerblue", strokeWidth: 4, pickable: false }),
$(go.Placeholder, { margin: 2 })
),
$(go.Panel,
$("SectorButton", 0, 90, // start angle, sweep angle,
$(go.TextBlock, "New\nLink"),
{ // start drawing a new link from this node
click: (e, button) => {
var node = button.part.adornedPart; // this Node
e.diagram.clearSelection(); // hide all Adornments for clarity
var tool = e.diagram.toolManager.linkingTool; // the LinkingTool
tool.startObject = node.port; // the default port of the Node
e.diagram.currentTool = tool; // start the LinkingTool
tool.doActivate(); // and activate it
}
}),
$("SectorButton", 90, 90,
$(go.Shape, { geometryString: "F1 M29.181 19.070c-1.679-2.908-0.669-6.634 2.255-8.328l-3.145-5.447c-0.898 0.527-1.943 0.829-3.058 0.829-3.361 0-6.085-2.742-6.085-6.125h-6.289c0.008 1.044-0.252 2.103-0.811 3.070-1.679 2.908-5.411 3.897-8.339 2.211l-3.144 5.447c0.905 0.515 1.689 1.268 2.246 2.234 1.676 2.903 0.672 6.623-2.241 8.319l3.145 5.447c0.895-0.522 1.935-0.82 3.044-0.82 3.35 0 6.067 2.725 6.084 6.092h6.289c-0.003-1.034 0.259-2.080 0.811-3.038 1.676-2.903 5.399-3.894 8.325-2.219l3.145-5.447c-0.899-0.515-1.678-1.266-2.232-2.226zM16 22.479c-3.578 0-6.479-2.901-6.479-6.479s2.901-6.479 6.479-6.479c3.578 0 6.479 2.901 6.479 6.479s-2.901 6.479-6.479 6.479z" }),
{
click: (e, button) => {
// maybe use a DataInspector?
alert("Show Settings for " + button.part.adornedPart.data.text);
}
}),
$("SectorButton", 180, 90,
$(go.TextBlock, "?", { font: "bold 14pt sans-serif" }),
{
click: (e, button) => {
// maybe show some info in HTML?
alert("Show Information about " + button.part.adornedPart.data.text);
}
}),
$("SectorButton", 270, 90,
$(go.Shape, "XLine", { stroke: "red", strokeWidth: 4, width: 16, height: 16 }),
{
click: (e, button) => {
// this is different from CommandHandler.deleteSelection because this
// only deletes the one node, not all selected parts
e.diagram.commit(d => d.remove(button.part.adornedPart), "deleted node");
}
})
)
);
myDiagram.model = new go.GraphLinksModel(
[
{ key: 1, text: "Alpha", color: "lightblue" },
{ key: 2, text: "Beta", color: "orange" },
{ key: 3, text: "Gamma", color: "lightgreen" },
{ key: 4, text: "Delta", color: "pink" },
],
[
{ from: 1, to: 2 },
{ from: 1, to: 3 },
{ from: 2, to: 2 },
{ from: 3, to: 4 },
{ from: 4, to: 1 }
]);
}
window.addEventListener('DOMContentLoaded', init);
</script>
<div id="sample">
<div id="myDiagramDiv" style="border: solid 1px black; width:100%; height:500px"></div>
<p>
Selecting a Node shows not only a dodgerblue rectangle around the selected node,
but also a circular arrangement of Buttons.
The red "X" deletes the node.
The "?" and cog/gear Shape currently just call `alert`, but they could do anything that you want.
The "New Link" starts the <a>LinkingTool</a> drawing a new Link from that Node.
</p>
</div>
</div>
<!-- * * * * * * * * * * * * * -->
<!-- End of GoJS sample code -->
</div>
</body>
<!-- This script is part of the gojs.net website, and is not needed to run the sample -->
<script src="../assets/js/goSamples.js"></script>
</html>