| name | scadavis-api |
| description | Guide for integrating, controlling, and programmatically managing the SCADAvis Web Component. Optimized for building advanced, real-time industrial dashboards and visualization interfaces. Use when user mentions SCADAvis, API, or web component. |
🚀 SCADAvis-API: Development Guide
The <scada-vis> web component is a high-performance, industrial-grade visualization engine for SVG-based SCADA displays. It encapsulates the WebSAGE core engine and provides a rich API for data binding, viewport control, and UI customization.
📦 Integration Patterns
The SCADAvis web component is a standard Custom Element and can be integrated into any HTML page using several patterns.
1. Modern ESM Import (Recommended)
This is the standard approach for projects using a build tool (Vite, Webpack, etc.) or modern browsers.
<script type="module">
import './node_modules/@dscsystems/scadavis-web-component/dist/scada-vis.js'
</script>
<scada-vis src="diagram.svg"></scada-vis>
2. Standard Script Tag
Useful for quick prototyping or traditional multi-page applications.
<script
src="./node_modules/@dscsystems/scadavis-web-component/dist/scada-vis.js"
type="module"
></script>
<scada-vis id="viewer" src="diagram.svg"></scada-vis>
<script>
const viewer = document.getElementById('viewer')
viewer.addEventListener('ready', () => {
viewer.setValue('TAG_01', 100)
})
</script>
3. CDN Usage (No Installation)
If you haven't installed the package locally, you can use the SCADAvis.io server.
<script type="module" src="https://scadavis.io/synoptic3/scada-vis.js"></script>
<scada-vis src="https://example.com/diagram.svg"></scada-vis>
🏗️ Complete HTML Template Example
Here is a full, production-ready template showing how to handle styles, and data updates.
<html>
<body>
<script
src="https://scadavis.io/synoptic3/scada-vis.js"
type="module"
></script>
<scada-vis id="scada-vis1" style="height:250px;width:250px;"></scada-vis>
<script>
window.onload = async () => {
const component = document.querySelector('#scada-vis1')
await component.loadURL(
'https://raw.githubusercontent.com/dscsystems/displayfiles/master/donut.svg'
)
setInterval(() => {
component.setValue('TAG1', Math.random() * 100)
if (component.getValue('TAG1') >= 75)
component.setValue('TAG2', 'alarmed!')
else component.(, )
}, )
}
Complex example
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8" />
<meta name="viewport" content="width=device-width, initial-scale=1.0" />
<title>Pen</title>
<script
src="https://scadavis.io/synoptic3/scada-vis.js"
type="module"
></script>
</head>
<body>
<script>
window.onload = () => {
scadavisInit({
styleParams: 'height="390" width="680"',
svgurl:
'https://raw.githubusercontent.com/dscsystems/displayfiles/master/kor1-v2.svg',
}).then((substationsynoptic) => {
substationsynoptic.zoomTo(0.42)
substationsynoptic.enableTools(true, true)
substationsynoptic.storeValue(
,
.( + .()),
,
)
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substationsynoptic.(, , , )
() {
xcbr1 = .() > ? :
substationsynoptic.(
,
xcbr1,
,
!xcbr1
)
kv230 = + .() *
kv23 =
(kv230 / ) *
xcbr1 *
.(substationsynoptic.() / )
substationsynoptic.(
,
kv230,
,
kv230 > || kv230 <
)
substationsynoptic.(
,
kv23,
,
kv23 > || kv23 <
)
xcbr7 = .() > ? :
substationsynoptic.(, xcbr7, , !xcbr7)
substationsynoptic.(
,
.() > ? : ,
,
)
substationsynoptic.(
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,
)
substationsynoptic.(
,
,
.() > ? : ,
)
substationsynoptic.(
,
,
,
.() > ? :
)
= ,
tMW =
= ,
tMVAR =
tMW += = ( + .() * ) * xcbr1 * xcbr7
tMVAR += = ( - .() * ) * xcbr1 * xcbr7
substationsynoptic.(, , , )
substationsynoptic.(, , , )
tMW += = ( + .() * ) * xcbr1
tMVAR += = ( - .() * ) * xcbr1
substationsynoptic.(, , , )
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tMW += = ( + .() * ) * xcbr1
tMVAR += = ( - .() * ) * xcbr1
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tMW += = ( + .() * ) * xcbr1
tMVAR += = ( - .() * ) * xcbr1
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tMW += = ( + .() * ) * xcbr1
tMVAR += = ( - .() * ) * xcbr1
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tMW += = ( + .() * ) * xcbr1
tMVAR += = ( - .() * ) * xcbr1
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tMW += = ( + .() * ) * xcbr1
tMVAR += = ( - .() * ) * xcbr1
substationsynoptic.(, , , )
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tMW += = ( + .() * ) * xcbr1
tMVAR += = ( - .() * ) * xcbr1
substationsynoptic.(, , , )
substationsynoptic.(, , , )
substationsynoptic.(, tMW, , )
substationsynoptic.(, tMVAR, , )
substationsynoptic.()
}
()
(updateSubstation, )
substationsynoptic.(, () {
.(event, tag)
v = substationsynoptic.(tag)
(event.. === ) {
substationsynoptic.(tag, v + , , )
} (event.. === ) {
substationsynoptic.(tag, v - , , )
}
(event.. === ) {
substationsynoptic.(tag, , , )
} (event.. === ) {
substationsynoptic.(tag, , , )
}
(v === )
substationsynoptic.(tag, , , )
(v === )
substationsynoptic.(tag, , , )
})
})
}
🏗️ Architecture & Lifecycle
The component uses Shadow DOM for style encapsulation. It operates in three distinct lifecycle states:
- State 0 (Unloaded): The component is in the DOM but no SVG source is specified.
- State 1 (Graphic Ready): SVG markup is loaded and the graphics engine is initialized.
- State 2 (Data Ready): Animations are bound, and the component is ready for real-time value updates.
🛠️ Declarative API (Attributes)
| Attribute | Type | Description |
|---|
src / svgurl | string | Required. URL of the SVG file. Changing this triggers an automatic reload. |
colorstable | string (JSON) | Optional. Maps indices to CSS colors. Format: '{"1": "#ff0000", "2": "#00ff00"}'. |
💻 Imperative API Reference: Methods
🔵 Real-time Data Binding
Efficiently push values to SVG animations.
setValue(tag, value, failed?, alarmed?, description?)
Updates a single point and immediately triggers an SVG redraw.
tag: string | number (Tag name or Point index).value: number | boolean | string.failed: boolean (default false). If true, applies "Failed" styling (usually gray/dashed).alarmed: boolean (default false). If true, triggers "Alarm" styling (usually blinking red).
storeValue(tag, value, ...)
Same signature as setValue, but only updates the internal state. Does not redraw the SVG. Use this for high-frequency updates.
updateValues(values?)
Flushes all buffered storeValue updates to the SVG in a single redraw.
values: Optional object { "tag1": val1, ... } to add during the flush.
refreshDisplay(values)
🟢 Returns Promise<boolean>. The modern, async version of updateValues. Resolves when the rendering cycle is finished.
getValue(tag)
Returns the current cached value for a tag. Returns null if the tag is not found.
getTagsList() / getTags()
Returns an array of strings containing every valid tag name discovered in the current SVG.
🔍 Viewport & Interactivity
Fine-grained control over the user experience.
zoomTo(level, target?)
Zooms to a specific multiplier.
level: 1.0 is original size.target: Optional element ID or {x, y} object to center the zoom on.
moveBy(dx, dy)
Pans the viewport by the specified pixel deltas.
zoomToOriginal()
Resets the viewport to the initial "Fit to Width" state.
enableTools(options)
Shows or hides built-in toolbar buttons.
options: { panEnabled: boolean, zoomEnabled: boolean }.
enableMouse(options)
Enables or disables mouse interactions.
options: { panEnabled: boolean, zoomEnabled: boolean }.
setMouseWheel(options)
Configures the scroll-to-zoom behavior.
options: { directionBackOut: boolean, blockEventPropagation: boolean }.
🎨 UI & Theming
setBackgroundColor(color)
Updates the background of the component container.
setColor(index, color) / setColors(table)
Updates the dynamic color palette. Index -1 targets the SVG background.
setStatus(text) / setTime(text)
Updates the text content of the integrated status and time bars.
setToolbarVisible(show) / setWatermarkVisible(show)
Explicitly toggles the visibility of built-in UI overlays.
🔔 Event System
All events are standard CustomEvent objects dispatched from the <scada-vis> element.
| Event | detail Payload | Description |
|---|
ready | { tagsList: string[] } | Fired when the component reaches State 2. |
error | { error: string } | Fired when a file fails to load or script errors occur. |
click | { tag: string, event: MouseEvent } | Fired when a tagged SVG element is clicked. |
zoomPan | { action: number } | Fired on any viewport transformation. |
🏛️ Legacy & Factory API
scadavisInit
The recommended way to inject the component programmatically.
import { scadavisInit } from '@dscsystems/scadavis-web-component'
scadavisInit({
container: document.body,
svgurl: 'panel.svg',
styleParams: 'width="100%" height="500px"',
}).then((viewer) => {
viewer.setValue('TEMP', 24.5)
})
💡 Comprehensive Usage Examples
1. Real-time Simulation Loop
const viewer = document.querySelector('scada-vis')
viewer.addEventListener('ready', () => {
setInterval(() => {
viewer.storeValue('TAG_VOLTAGE', 220 + Math.random() * 5)
viewer.storeValue('TAG_CURRENT', 10 + Math.random())
viewer.updateValues()
}, 1000)
})
2. Custom Command Palette
function focusSubstation(subId) {
const viewer = document.getElementById('main-viewer')
viewer.zoomTo(2.5, subId)
viewer.setStatus(`Focusing on Service Area: ${subId}`)
}
3. Advanced Click Handling
viewer.on('click', (event, tagName) => {
if (tagName.startsWith('BREAKER_')) {
const currentState = viewer.getValue(tagName)
const newState = !currentState
viewer.setValue(tagName, newState, false, true)
console.log(`Command sent: Toggle ${tagName} to ${newState}`)
}
})
4. Dynamic Theme Switching
function applyNightMode() {
const viewer = document.querySelector('scada-vis')
viewer.setBackgroundColor('#121212')
viewer.setColors({
1: '#BB86FC',
2: '#03DAC6',
'-1': '#1E1E1E',
})
}
