merge method Null safety
- ButtonStyle? style
Returns a copy of this ButtonStyle where the non-null fields in style
have replaced the corresponding null fields in this ButtonStyle.
In other words, style
is used to fill in unspecified (null) fields
this ButtonStyle.
Implementation
ButtonStyle merge(ButtonStyle? style) {
if (style == null) {
return this;
}
return copyWith(
textStyle: textStyle ?? style.textStyle,
backgroundColor: backgroundColor ?? style.backgroundColor,
foregroundColor: foregroundColor ?? style.foregroundColor,
overlayColor: overlayColor ?? style.overlayColor,
shadowColor: shadowColor ?? style.shadowColor,
surfaceTintColor: surfaceTintColor ?? style.surfaceTintColor,
elevation: elevation ?? style.elevation,
padding: padding ?? style.padding,
minimumSize: minimumSize ?? style.minimumSize,
fixedSize: fixedSize ?? style.fixedSize,
maximumSize: maximumSize ?? style.maximumSize,
iconSize: iconSize ?? style.iconSize,
side: side ?? style.side,
shape: shape ?? style.shape,
mouseCursor: mouseCursor ?? style.mouseCursor,
visualDensity: visualDensity ?? style.visualDensity,
tapTargetSize: tapTargetSize ?? style.tapTargetSize,
animationDuration: animationDuration ?? style.animationDuration,
enableFeedback: enableFeedback ?? style.enableFeedback,
alignment: alignment ?? style.alignment,
splashFactory: splashFactory ?? style.splashFactory,
);
}