gojs
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Interactive diagrams, charts, and graphs, such as trees, flowcharts, orgcharts, UML, BPMN, or business diagrams
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text/typescript
/*
* Copyright (C) 1998-2020 by Northwoods Software Corporation. All Rights Reserved.
*/
/*
* This is an extension and not part of the main GoJS library.
* Note that the API for this class may change with any version, even point releases.
* If you intend to use an extension in production, you should copy the code to your own source directory.
* Extensions can be found in the GoJS kit under the extensions or extensionsTS folders.
* See the Extensions intro page (https://gojs.net/latest/intro/extensions.html) for more information.
*/
import * as go from '../release/go-module.js';
// A "HyperlinkText" is either a TextBlock or a Panel containing a TextBlock that when clicked
// opens a new browser window with a given or computed URL.
// When the user's mouse passes over a "HyperlinkText", the text is underlined.
// When the mouse hovers over a "HyperlinkText", it shows a tooltip that displays the URL.
// This "HyperlinkText" builder is not pre-defined in the GoJS library, so you will need to load this definition.
// Typical usages:
// $("HyperlinkText", "https://gojs.net", "Visit GoJS")
//
// $("HyperlinkText",
// function(node) { return "https://gojs.net/" + node.data.version; },
// function(node) { return "Visit GoJS version " + node.data.version; })
//
// $("HyperlinkText",
// function(node) { return "https://gojs.net/" + node.data.version; },
// $(go.Panel, "Auto",
// $(go.Shape, ...),
// $(go.TextBlock, ...)
// )
// )
// The first argument to the "HyperlinkText" builder should be either the URL string or a function
// that takes the data-bound Panel and returns the URL string.
// If the URL string is empty or if the function returns an empty string,
// the text will not be underlined on a mouse-over and a click has no effect.
// The second argument to the "HyperlinkText" builder may be either a string to display in a TextBlock,
// or a function that takes the data-bound Panel and returns the string to display in a TextBlock.
// If no text string or function is provided, it assumes all of the arguments are used to
// define the visual tree for the "HyperlinkText", in the normal fashion for a Panel.
// The result is either a TextBlock or a Panel.
go.GraphObject.defineBuilder('HyperlinkText', (args) => {
// the URL is required as the first argument, either a string or a side-effect-free function returning a string
const url = go.GraphObject.takeBuilderArgument(args, undefined, (x) => typeof x === 'string' || typeof x === 'function');
// the text for the HyperlinkText is the optional second argument, either a string or a side-effect-free function returning a string
let text = go.GraphObject.takeBuilderArgument(args, null, (x) => typeof x === 'string' || typeof x === 'function');
// see if the visual tree is supplied in the arguments to the "HyperlinkText"
let anyGraphObjects = false;
for (let i = 0; i < args.length; i++) {
const a = args[i];
if (a && a instanceof go.GraphObject) anyGraphObjects = true;
}
// define the click behavior
const click =
(e: go.InputEvent, obj: go.GraphObject) => {
let u = (obj as any)._url;
if (typeof u === 'function') u = u(obj.findTemplateBinder());
if (u) window.open(u, '_blank');
};
// define the tooltip
const tooltip =
go.GraphObject.make<go.Adornment>('ToolTip',
go.GraphObject.make(go.TextBlock,
{ name: 'TB', margin: 4 },
new go.Binding('text', '', function(obj) {
// here OBJ will be in the Adornment, need to get the HyperlinkText/TextBlock
obj = obj.part.adornedObject;
let u = obj._url;
if (typeof u === 'function') u = u(obj.findTemplateBinder());
return u;
}).ofObject()
),
new go.Binding('visible', 'text', function(t) { return !!t; }).ofObject('TB')
);
// if the text is provided, use a new TextBlock; otherwise assume the TextBlock is provided
if (typeof (text) === 'string' || typeof (text) === 'function' || !anyGraphObjects) {
if (text === null && typeof (url) === 'string') text = url;
const tb = go.GraphObject.make(go.TextBlock,
{
'_url': url,
cursor: 'pointer',
mouseEnter: function(e: go.InputEvent, obj: go.GraphObject) {
let u = (obj as any)._url;
if (typeof u === 'function') u = u(obj.findTemplateBinder());
if (u && obj instanceof go.TextBlock) obj.isUnderline = true;
},
mouseLeave: (e: go.InputEvent, obj: go.GraphObject) => { if (obj instanceof go.TextBlock) obj.isUnderline = false; },
click: click, // defined above
toolTip: tooltip // shared by all HyperlinkText textblocks
}
);
if (typeof (text) === 'string') {
tb.text = text;
} else if (typeof (text) === 'function') {
tb.bind(new go.Binding('text', '', text).ofObject());
} else if (typeof (url) === 'function') {
tb.bind(new go.Binding('text', '', url).ofObject());
}
return tb;
} else {
const findTextBlock = function(obj: go.GraphObject): go.TextBlock | null {
if (obj instanceof go.TextBlock) return obj;
if (obj instanceof go.Panel) {
const it = obj.elements;
while (it.next()) {
const result = findTextBlock(it.value);
if (result !== null) return result;
}
}
return null;
};
return go.GraphObject.make(go.Panel,
{
'_url': url,
cursor: 'pointer',
mouseEnter: (e: go.InputEvent, panel: go.GraphObject) => {
const tb = findTextBlock(panel);
let u = (panel as any)._url;
if (typeof u === 'function') u = u(panel.findTemplateBinder());
if (tb !== null && u) tb.isUnderline = true;
},
mouseLeave: (e: go.InputEvent, panel: go.GraphObject) => {
const tb = findTextBlock(panel);
if (tb !== null) tb.isUnderline = false;
},
click: click, // defined above
toolTip: tooltip // shared by all HyperlinkText panels
}
);
}
});