mashazyu
68 lines
2.0 KiB
JavaScript
68 lines
2.0 KiB
JavaScript
import { scaleObservable, unitObservable } from '../../local-storage'
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import config from '../../config'
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export function normalizeToScale(temp, columnHeight) {
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const scale = scaleObservable.value
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const valueRelativeToScale = (scale.max - temp) / (scale.max - scale.min)
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return getAbsoluteValue(valueRelativeToScale, columnHeight)
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}
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function getAbsoluteValue(relative, columnHeight) {
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// we add some height to have some breathing room
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const verticalPadding = columnHeight * config.temperatureScale.verticalPadding
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const scaleHeight = columnHeight - 2 * verticalPadding
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return scaleHeight * relative + verticalPadding
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}
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export function getTickPositions(columnHeight) {
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const units = unitObservable.value
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const scaleMin = scaleObservable.value.min
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const scaleMax = scaleObservable.value.max
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const numberOfTicks = (scaleMax - scaleMin) * (1 / units) + 1
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const tickDistance = 1 / (numberOfTicks - 1)
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const tickPositions = []
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for (let i = 0; i < numberOfTicks; i++) {
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const position = getAbsoluteValue(tickDistance * i, columnHeight)
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tickPositions.push(position)
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}
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return tickPositions
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}
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export function getTickList(columnHeight) {
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const units = unitObservable.value
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const scaleMax = scaleObservable.value.max
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return getTickPositions(columnHeight).map((tickPosition, i) => {
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const tick = scaleMax - i * units
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let isBold, label, shouldShowLabel
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if (Number.isInteger(tick)) {
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isBold = true
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label = tick.toString() + '.0'
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} else {
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isBold = false
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label = tick.toString()
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}
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// when temp range <= 3, units === 0.1 we show temp values with step 0.2
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// when temp range > 3, units === 0.5 we show temp values with step 0.5
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if (units === 0.1) {
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// show label with step 0.2
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shouldShowLabel = !(tick * 10 % 2)
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} else {
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// show label with step 0.5
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shouldShowLabel = !(tick * 10 % 5)
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}
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return {
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position: tickPosition,
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label,
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isBold,
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shouldShowLabel,
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}
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})
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}
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