ProgressIndicator constructor

const ProgressIndicator({Key key, double value, Color backgroundColor, Animation<Color> valueColor, String semanticsLabel, String semanticsValue })

Creates a progress indicator.

The value argument can be either null (corresponding to an indeterminate progress indicator) or non-null (corresponding to a determinate progress indicator). See value for details.

Accessibility

The semanticsLabel can be used to identify the purpose of this progress bar for screen reading software. The semanticsValue property may be used for determinate progress indicators to indicate how much progress has been made.

Implementation 

const ProgressIndicator({
  Key key,
  this.value,
  this.backgroundColor,
  this.valueColor,
  this.semanticsLabel,
  this.semanticsValue,
}) : super(key: key);