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InterpolatorInput.js
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InterpolatorInput.js
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import { select } from 'd3-selection';
import { range } from 'd3-array';
import * as d3Scale from 'd3-scale';
import * as d3ScaleChromatic from 'd3-scale-chromatic';
import { className, renderComponent } from './utils';
import ColorBar from './ColorBar';
import InterpolatorSelector from './InterpolatorSelector';
export default class InterpolatorInput {
constructor(parent, props) {
this.parent = parent;
this.handleInterpolatorChange = this.handleInterpolatorChange.bind(this);
this.update(props);
}
update(nextProps) {
this.props = nextProps;
this.render();
}
setup() {
// create the main panel div
this.root = select(this.parent)
.append('div')
.attr('class', className('interpolator-input'));
}
handleInterpolatorChange(interpolator) {
const newInterpolator = d3Scale[interpolator] || d3ScaleChromatic[interpolator];
if (newInterpolator) {
this.props.onChange(newInterpolator);
}
}
renderColorBar() {
const interpolatorColors = range(0, 1, 0.01).map(t => this.props.interpolator(t));
this.colorBar = renderComponent(this.colorBar, ColorBar, this.root.node(), {
colors: interpolatorColors,
});
}
renderInterpolatorSelector() {
this.interpolatorSelector = renderComponent(this.interpolatorSelector, InterpolatorSelector,
this.root.node(), {
interpolator: this.props.interpolator,
onChange: this.handleInterpolatorChange,
});
}
render() {
if (!this.root) {
this.setup();
}
this.renderColorBar();
this.renderInterpolatorSelector();
}
}