public override Widget build(BuildContext context)
{
D.assert(WidgetsD.debugCheckHasMediaQuery(context));
ThemeData theme = Theme.of(context);
TextStyle textStyle = theme.primaryTextTheme.subhead.copyWith(color: this.foregroundColor);
Color effectiveBackgroundColor = this.backgroundColor;
if (effectiveBackgroundColor == null)
{
switch (ThemeData.estimateBrightnessForColor(textStyle.color))
{
case Brightness.dark:
effectiveBackgroundColor = theme.primaryColorLight;
break;
case Brightness.light:
effectiveBackgroundColor = theme.primaryColorDark;
break;
}
}
else if (this.foregroundColor == null)
{
switch (ThemeData.estimateBrightnessForColor(this.backgroundColor))
{
case Brightness.dark:
textStyle = textStyle.copyWith(color: theme.primaryColorLight);
break;
case Brightness.light:
textStyle = textStyle.copyWith(color: theme.primaryColorDark);
break;
}
}
float minDiameter = this._minDiameter;
float maxDiameter = this._maxDiameter;
return(new AnimatedContainer(
constraints: new BoxConstraints(
minHeight: minDiameter,
minWidth: minDiameter,
maxWidth: maxDiameter,
maxHeight: maxDiameter
),
duration: Constants.kThemeChangeDuration,
decoration: new BoxDecoration(
color: effectiveBackgroundColor,
image: this.backgroundImage != null
? new DecorationImage(image: this.backgroundImage, fit: BoxFit.cover)
: null,
shape: BoxShape.circle
),
child: this.child == null
? null
: new Center(
child: new MediaQuery(
data: MediaQuery.of(context).copyWith(textScaleFactor: 1.0f),
child: new IconTheme(
data: theme.iconTheme.copyWith(color: textStyle.color),
child: new DefaultTextStyle(
style: textStyle,
child: this.child
)
)
)
)
));
}