public override Widget build(BuildContext context)
{
ButtonThemeData parentButtonTheme = ButtonTheme.of(context);
ButtonBarThemeData barTheme = ButtonBarTheme.of(context);
ButtonThemeData buttonTheme = parentButtonTheme.copyWith(
textTheme: buttonTextTheme ?? barTheme?.buttonTextTheme ?? ButtonTextTheme.primary,
minWidth: buttonMinWidth ?? barTheme?.buttonMinWidth ?? 64.0f,
height: buttonHeight ?? barTheme?.buttonHeight ?? 36.0f,
padding: buttonPadding ?? barTheme?.buttonPadding ?? EdgeInsets.symmetric(horizontal: 8.0f),
alignedDropdown: buttonAlignedDropdown ?? barTheme?.buttonAlignedDropdown ?? false,
layoutBehavior: layoutBehavior ?? barTheme?.layoutBehavior ?? ButtonBarLayoutBehavior.padded
);
float paddingUnit = buttonTheme.padding.horizontal / 4.0f;
Widget child = ButtonTheme.fromButtonThemeData(
data: buttonTheme,
child: new _ButtonBarRow(
mainAxisAlignment: alignment ?? barTheme?.alignment ?? MainAxisAlignment.end,
mainAxisSize: mainAxisSize ?? barTheme?.mainAxisSize ?? MainAxisSize.max,
overflowDirection: overflowDirection ?? barTheme?.overflowDirection ?? VerticalDirection.down,
children: LinqUtils <Widget> .SelectList(children, ((Widget childWidget) => {
return((Widget) new Padding(
padding: EdgeInsets.symmetric(horizontal: paddingUnit),
child: childWidget
));
})),
overflowButtonSpacing: overflowButtonSpacing
)
);
switch (buttonTheme.layoutBehavior)
{
case ButtonBarLayoutBehavior.padded:
return(new Padding(
padding: EdgeInsets.symmetric(
vertical: 2.0f * paddingUnit,
horizontal: paddingUnit
),
child: child
));
case ButtonBarLayoutBehavior.constrained:
return(new Container(
padding: EdgeInsets.symmetric(horizontal: paddingUnit),
constraints: new BoxConstraints(minHeight: 52.0f),
alignment: Alignment.center,
child: child
));
}
D.assert(false);
return(null);
}
public static ButtonThemeData of(BuildContext context)
{
ButtonTheme inheritedButtonTheme = (ButtonTheme)context.dependOnInheritedWidgetOfExactType <ButtonTheme>();
ButtonThemeData buttonTheme = inheritedButtonTheme?.data;
if (buttonTheme?.colorScheme == null)
{
ThemeData theme = Theme.of(context);
buttonTheme = buttonTheme ?? theme.buttonTheme;
if (buttonTheme.colorScheme == null)
{
buttonTheme = buttonTheme.copyWith(
colorScheme: theme.buttonTheme.colorScheme ?? theme.colorScheme);
D.assert(buttonTheme.colorScheme != null);
}
}
return(buttonTheme);
}
