Control whether FPS is enabled dynamically

[litang0908]

Make StatsFlState public and add a new method updateEnable() to control isEnabled.

for example:

final statsflKey = GlobalKey<StatsFlState>();

Widget app = StatsFl(
    key: statsflKey,
    isEnabled: true,
    showText: true,
    align: Alignment.centerLeft,
    maxFps: 120,
    child: Center(
      child: ElevatedButton(
        onPressed: () {
          if (statsflKey.currentState?.isEnabled == true) {
            statsflKey.currentState?.updateEnable(false);
          } else {
            statsflKey.currentState?.updateEnable(true);
          }
        },
        child: Text("Toggle"),
      ),
    ),
  );

[esDotDev]

Can't you just do:

Widget app = StatsFl(
    key: statsflKey,
    isEnabled: _showStats,
   ...
);

and

onPressed: () {
  setState((){
    _showStats = !_showStats;
  });},

Maybe we need to add a didUpdateWidget hook to start/stop the timer when isEnabled changes?

[litang0908]

Thanks for repling, this PR will be closed.