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https://github.com/arction/lcjs-example-0706-onscreenmenu
On Screen Menu showcase
https://github.com/arction/lcjs-example-0706-onscreenmenu
demo lightningchart-js menu template
Last synced: about 4 hours ago
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On Screen Menu showcase
- Host: GitHub
- URL: https://github.com/arction/lcjs-example-0706-onscreenmenu
- Owner: Arction
- License: mit
- Created: 2021-09-22T11:04:02.000Z (about 3 years ago)
- Default Branch: master
- Last Pushed: 2024-08-05T07:13:17.000Z (4 months ago)
- Last Synced: 2024-08-06T08:09:44.768Z (3 months ago)
- Topics: demo, lightningchart-js, menu, template
- Language: JavaScript
- Homepage: https://www.arction.com/lightningchart-js-interactive-examples/examples/lcjs-example-0706-onScreenMenu.html
- Size: 13.4 MB
- Stars: 0
- Watchers: 4
- Forks: 0
- Open Issues: 0
-
Metadata Files:
- Readme: README.md
- License: LICENSE
Awesome Lists containing this project
README
# JavaScript On Screen Menu
This demo application belongs to the set of examples for LightningChart JS, data visualization library for JavaScript.
LightningChart JS is entirely GPU accelerated and performance optimized charting library for presenting massive amounts of data. It offers an easy way of creating sophisticated and interactive charts and adding them to your website or web application.
The demo can be used as an example or a seed project. Local execution requires the following steps:
- Make sure that relevant version of [Node.js](https://nodejs.org/en/download/) is installed
- Open the project folder in a terminal:
npm install # fetches dependencies
npm start # builds an application and starts the development server
- The application is available at _http://localhost:8080_ in your browser, webpack-dev-server provides hot reload functionality.
## Description
Example showcasing the use of On Screen Menu.
On-Screen Menu (OSM) is part of UI that can be used to simplify interaction with charts.
In this case the default buttons are used along with a custom button that shows/hides the intersection points of lines.
The On-Screen menu can be added this way:
```javascript
const chart = lightningChart().ChartXY()
chart.addOnScreenMenu(
[
[
// default buttnos
OnScreenMenuButtonType.ZoomInX,
OnScreenMenuButtonType.ZoomOutX,
OnScreenMenuButtonType.ZoomInY,
OnScreenMenuButtonType.ZoomOutY,
OnScreenMenuButtonType.ZoomToFit,
OnScreenMenuButtonType.ToggleAnimations,
],
],
OnScreenMenuButtonShape.RoundedRectangle,
)
```
To add a custom button parameters must be defined.
```javascript
const chart = lightningChart().ChartXY()
chart.addOnScreenMenu([
[
// cusrom button
{
icon: new URL(document.head.baseURI).origin + new URL(document.head.baseURI).pathname + 'examples/assets/9999/icon.png',
dimensions: { rows: 1, columns: 1 },
label: '',
opacity: '0.8',
color: 'blue',
shape: OnScreenMenuButtonShape.RoundedRectangle,
action: show,
},
],
])
```
'addOnScreenMenu' takes an array of arrays as a parameter.
Each sub array adds a new line on the OSM menu.
```javascript
const chart = lightningChart().ChartXY()
chart.addOnScreenMenu([
[
OnScreenMenuButtonType.ZoomInX,
OnScreenMenuButtonType.ZoomOutX,
OnScreenMenuButtonType.ZoomInY,
OnScreenMenuButtonType.ZoomOutY,
OnScreenMenuButtonType.ZoomIn,
OnScreenMenuButtonType.ZoomOut,
],
[OnScreenMenuButtonType.ZoomToFit, OnScreenMenuButtonType.ToggleAnimations],
[
{
icon: new URL(document.head.baseURI).origin + new URL(document.head.baseURI).pathname + 'examples/assets/9999/icon.png',
dimensions: { rows: 1, columns: 1 },
opacity: '0.8',
color: 'blue',
shape: OnScreenMenuButtonShape.RoundedRectangle,
action: show,
},
],
])
```
Formula of lines intersection
```javascript
function calculateIntersection(currPoint1, prevPoint1, currPoint2, prevPoint2) {
// Expressions of numerator
const exp1 = currPoint1.x * prevPoint1.y - currPoint1.y * prevPoint1.x // (x1 * y2 - y1 * x2)
const exp2 = currPoint2.x * prevPoint2.y - currPoint2.y * prevPoint2.x // (x3 * y4 - y3 * x4)
const exp3 = currPoint2.x - prevPoint2.x // (x3 - x4)
const exp4 = currPoint1.x - prevPoint1.x // (x1 - x2)
const exp5 = currPoint2.y - prevPoint2.y // (y3 - y4)
const exp6 = currPoint1.y - prevPoint1.y // (y1 - y2)
// Denominator
const d1 = (currPoint1.x - prevPoint1.x) * (currPoint2.y - prevPoint2.y) // (x1 - x2) * (y3 - y4)
const d2 = (currPoint1.y - prevPoint1.y) * (currPoint2.x - prevPoint2.x) // (y1 - y2) * (x3 - x4)
const d = d1 - d2
if (d === 0) {
throw new Error('Number of intersection points is zero or infinity.')
}
const px = (exp1 * exp3 - exp4 * exp2) / d
const py = (exp1 * exp5 - exp6 * exp2) / d
const p = { x: px, y: py }
// Return point
return p
}
```
## API Links
* [Point Series]
* [Line Series]
* [On Screen Menu]
## Support
If you notice an error in the example code, please open an issue on [GitHub][0] repository of the entire example.
Official [API documentation][1] can be found on [LightningChart][2] website.
If the docs and other materials do not solve your problem as well as implementation help is needed, ask on [StackOverflow][3] (tagged lightningchart).
If you think you found a bug in the LightningChart JavaScript library, please contact [email protected].
Direct developer email support can be purchased through a [Support Plan][4] or by contacting [email protected].
[0]: https://github.com/Arction/
[1]: https://lightningchart.com/lightningchart-js-api-documentation/
[2]: https://lightningchart.com
[3]: https://stackoverflow.com/questions/tagged/lightningchart
[4]: https://lightningchart.com/support-services/
© LightningChart Ltd 2009-2022. All rights reserved.
[Point Series]: https://lightningchart.com/js-charts/api-documentation/v6.1.0/classes/PointSeries.html
[Line Series]: https://lightningchart.com/js-charts/api-documentation/v6.1.0/classes/LineSeries.html
[On Screen Menu]: https://lightningchart.com/js-charts/api-documentation/v6.1.0/classes/ChartXY.html#addOnScreenMenu