textScaleFactor property Null safety

double textScaleFactor

The system-reported text scale.

Accessing this value returns the value contained in the PlatformDispatcher singleton, so instead of getting it from here, you should consider getting it from WidgetsBinding.instance.platformDispatcher instead (or, when WidgetsBinding isn't available, from PlatformDispatcher.instance). The reason this value forwards to the PlatformDispatcher is to provide convenience for applications that only use a single main window.

This establishes the text scaling factor to use when rendering text, according to the user's platform preferences.

The onTextScaleFactorChanged callback is called whenever this value changes.

See also:


double get textScaleFactor => platformDispatcher.textScaleFactor;