How to turn off TouchTooltipData when touching a chart

[davidmarinangeli]

How can I avoid the popup data to show when I touch the LineChart ? I tried putting the object touchTooltipData: in LineTouchData at null but then my state is not updated correctly to my other widgets.

Another related question: how can I let the chart listen to normalPress and not only longPress? Each time I try to interact with the chart I have to "longpress" it

[davidmarinangeli]

Solved with

lineTouchData: LineTouchData( touchResponseSink: controller.sink, touchTooltipData: TouchTooltipData( tooltipBgColor: Colors.blueGrey, getTooltipItems: (touchedSpots) { return touchedSpots.map((touchedSpot) { return null; }).toList(); })),

returning null at getTooltipItems did the trick 👍

[imaNNeo]

Hi,
Well done about the trick, It is intentionally allowed to return null to prevent show the tooltip (maybe you want to disable it in first and last spot, you can retuen them null),
And about the normal touch, you're right currently we support only long touch, I will add normal touch to the chart ASAP

[davidmarinangeli]

Keep rocking! Hope to send my first PR soon :D

[sukhcha-in]

Another related question: how can I let the chart listen to normalPress and not only longPress? Each time I try to interact with the chart I have to "longpress" it
@davidmarinangeli did you find solution for this?

[imaNNeo]

Guys, currently you can't implement normal touch events in the chart,
If it is important to you, please make an issue, then thumb it up, I will add it with high priority.

[davidmarinangeli]

Hi,

Another related question: how can I let the chart listen to normalPress and not only longPress? Each time I try to interact with the chart I have to "longpress" it
@davidmarinangeli did you find solution for this?

As Iman told us the normal touch is a feature that will come eventually later. If you want to make an issue I will be really happy to thumb it up.

[jvcss]

awesome! and if you want to show only the tooltip for a specific line you can use this

LineChartData(
              lineTouchData: LineTouchData(touchTooltipData: LineTouchTooltipData(getTooltipItems: (touchedSpots) {
                return touchedSpots.map((touchedSpot) {
                  if (touchedSpot.barIndex == 0) { // show the tooltips for the first line defined in the list of `lineBarsData`
                    return LineTooltipItem(
                      '${touchedSpot.y}',
                      TextStyle(color: touchedSpot.bar.color),
                    );
                  }
                  return null; // hide tool tip for all other lines in the current chart that can have many lines.
                }).toList();
              })),
//...
)

in my case that was pretty usefull, thank you @davidmarinangeli