Is there a way to maintain the current data zoom when updating timeseries data on my chart? Every minute I update the data, but the zoom resets to 100 each time. Additionally, how can I modify the text color of the label for the data zoom? I have been unable to locate the setting for this adjustment.
Editor
I am looking to alter the text color of the label when dragging datazoom. https://i.sstatic.net/lGTpmJN9.png
Without seeing your code, my assumption is that the dataZoom component is being updated along with the data. By default, it should not reset.
The standard slider behavior involves applying a relative dataZoom (using the start/end properties) to adjust the slider when new data is added. However, if you apply an absolute dataZoom (using the startValue/endValue properties), the slider will maintain the selected zoom window.
To modify the text color, utilize the dataZoom.textStyle.color property.
Check out this example:
const hour = 1000 * 60 * 60;
let counter = 0;
function makeData() {
const data = Array.from([0,1,2,3,4,5], x => [(counter * 6 + x) * hour, Math.random() * 100]);
counter++;
return data;
}
let data = makeData();
option = {
xAxis: {
type: 'time'
},
yAxis: {},
dataZoom: {textStyle: {color: 'red'}},
series: [
{
type: 'line',
data: data,
}
]
};
// set absolute dataZoom
setTimeout(function() {
myChart.dispatchAction({
type: 'dataZoom',
dataZoomIndex: 0,
startValue: 0,
endValue: 4* hour
})
}, 1000);
// append data
setInterval(function() {
data = data.concat(makeData());
myChart.setOption({series: [{data: data}]});
}, 2000);
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