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const [holdx1, setHoldX1] = useState(0) | |
const [holdx2, setHoldX2] = useState(0) | |
const [pressx1, setPressX1] = useState(0) | |
const [pressx2, setPressX2] = useState(0) | |
function zoomData(data) { | |
const dataZoom = data | |
const leftPress = getIndex(Math.min(pressx1, pressx2), data) | |
const rightPress = getIndex(Math.max(pressx1, pressx2), data) | |
const leftHold = getIndex(Math.min(holdx1, holdx2), data) | |
const rightHold = getIndex(Math.max(holdx1, holdx2), data) | |
let leftDif = leftHold - leftPress | |
if (leftDif > 0) { leftDif = 0 } // evita o slice de começar pelo final do array | |
const rightDif = rightHold - rightPress | |
for (let i = 0; i < dataZoom.length; i++) { | |
dataZoom[i].data = dataZoom[i].data.slice(-leftDif, dataZoom[i].data.length + 1 - rightDif) | |
dataZoom[i].dataX = dataZoom[i].dataX.slice(-leftDif, dataZoom[i].data.length + 1 - rightDif) | |
} | |
sustainedData = dataZoom | |
return dataZoom | |
} | |
function renderData() { | |
if(count > 0) { | |
count = 0 | |
return zoomData(dataRender) | |
} else { | |
return zoomData(dataF) | |
} | |
} | |
return ( | |
<View style={{ height: 400, padding: 10, flexDirection: 'row', flex: 1 }} | |
onTouchStart={(evt) => { | |
if (evt.nativeEvent.touches.length === 2) { | |
setPressX1(evt.nativeEvent.touches[0].locationX), setPressX2(evt.nativeEvent.touches[1].locationX) | |
} | |
}} | |
onTouchMove={(evt) => { | |
if (evt.nativeEvent.touches.length === 1) { | |
setxPos(evt.nativeEvent.locationX) | |
} else if (evt.nativeEvent.touches.length === 2) { | |
setHoldX1(evt.nativeEvent.touches[0].locationX), setHoldX2(evt.nativeEvent.touches[1].locationX) | |
} | |
}} | |
onTouchEnd={(evt) => { | |
count++ | |
}}> | |
<YAxis | |
data={dataF[lengthierData(dataF)].data} | |
numberOfTicks={8} | |
formatLabel={(value) => ' ' + value + ' '} | |
svg={axesSvg} | |
contentInset={insetVertical} | |
style={{ marginBottom: 12, }} | |
max={5} | |
min={-5} | |
/> | |
<View style={{ flex: 1 }} > | |
<LineChart | |
data={renderData()} | |
contentInset={inset} | |
style={{ flex: 1 }} | |
yMin={-5} | |
yMax={5} | |
> | |
<Grid svg={{ stroke: '#DCDCDC' }} /> | |
<ToolTip xPos={xPos} colors={colors} /> | |
</LineChart> | |
<XAxis | |
data={dataF[lengthierData(dataF)].dataX} | |
numberOfTicks={8} | |
xAccessor={({ item }) => item} | |
formatLabel={(value, index) => moment(value).format(' H:mm:ss')} | |
svg={axesSvg} | |
contentInset={insetHorizontal} | |
/> | |
</View> | |
</View> | |
) | |
} |
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