Phylocanvas Scale-bar Plugin

Visual History for Phylocanvas.

Usage

npm install phylocanvas phylocanvas-plugin-scalebar

import Phylocanvas from 'phylocanvas';
import scalebarPlugin from 'phylocanvas-plugin-scalebar';

Phylocanvas.plugin(scalebarPlugin);

Phylocanvas.createTree('id', {
  // config defaults
  scalebar: {
    active: true,
    width: 100,
    height: 20,
    fillStyle: 'black',
    strokeStyle: 'black',
    lineWidth: 1,
    fontFamily: 'Sans-serif',
    fontSize: 16,
    textBaseline: 'bottom',
    textAlign: 'center',
    digits: 2,
    position: {
      bottom: 10,
      left: 10,
    },
  }
})

Options

A list of available options:

• active: Show the scale-bar. The default is true.
• width: The width of the scale-bar in pixels. The default is 100 pixels.
• height: The height of the scale-bar in pixels. The default is 20 pixels.
• lineWidth: The thickness of scale-bar lines in space units. The default is 1 pixel.
• strokeStyle: Specifies the colour or style to use for scale-bar lines. The default is #000 (black).
• fillStyle: Specifies the colour or style to use for scale-bar label. The default is #000 (black).
• fontFamily: Specifies the font family used when drawing scale-bar label. The default is Sans-serif.
• fontSize: Specifies the font size (pixels) used when drawing scale-bar label. The default is 16 pixels.
• digits: The number of digits to appear after the decimal point; this may be a value between 0 and 20, inclusive. The default is 2 digits.
• position: Specifies the scale-bar position on the canvas. Two keys should be provided, one for the vertical position and one for the horizontal position. The default value is { bottom: 10, left: 10 }.
  • Supported vertical position keys are top, middle, or bottom.
  • Supported horizontal position keys are left, centre, or right.