public override Widget build(BuildContext context)
{
MediaQueryData mediaQueryData = MediaQuery.of(context);
D.assert(widget.animation != null);
ThemeData theme = Theme.of(context);
ColorScheme colorScheme = theme.colorScheme;
SnackBarThemeData snackBarTheme = theme.snackBarTheme;
bool isThemeDark = theme.brightness == Brightness.dark;
Brightness brightness = isThemeDark ? Brightness.light : Brightness.dark;
Color themeBackgroundColor = isThemeDark
? colorScheme.onSurface
: Color.alphaBlend(colorScheme.onSurface.withOpacity(0.80f), colorScheme.surface);
ThemeData inverseTheme = new ThemeData(
brightness: brightness,
backgroundColor: themeBackgroundColor,
colorScheme: new ColorScheme(
primary: colorScheme.onPrimary,
primaryVariant: colorScheme.onPrimary,
secondary: isThemeDark ? colorScheme.primaryVariant : colorScheme.secondary,
secondaryVariant: colorScheme.onSecondary,
surface: colorScheme.onSurface,
background: themeBackgroundColor,
error: colorScheme.onError,
onPrimary: colorScheme.primary,
onSecondary: colorScheme.secondary,
onSurface: colorScheme.surface,
onBackground: colorScheme.background,
onError: colorScheme.error,
brightness: brightness
),
snackBarTheme: snackBarTheme
);
TextStyle contentTextStyle = snackBarTheme.contentTextStyle ?? inverseTheme.textTheme.subtitle1;
SnackBarBehavior snackBarBehavior = widget.behavior ?? snackBarTheme.behavior ?? SnackBarBehavior.fix;
bool isFloatingSnackBar = snackBarBehavior == SnackBarBehavior.floating;
float snackBarPadding = isFloatingSnackBar ? 16.0f : 24.0f;
CurvedAnimation heightAnimation =
new CurvedAnimation(parent: widget.animation, curve: SnackBarUtils._snackBarHeightCurve);
CurvedAnimation fadeInAnimation =
new CurvedAnimation(parent: widget.animation, curve: SnackBarUtils._snackBarFadeInCurve);
CurvedAnimation fadeOutAnimation = new CurvedAnimation(
parent: widget.animation,
curve: SnackBarUtils._snackBarFadeOutCurve,
reverseCurve: new Threshold(0.0f)
);
var childrenList = new List <Widget>()
{
new SizedBox(width: snackBarPadding),
new Expanded(
child: new Container(
padding: EdgeInsets.symmetric(vertical: SnackBarUtils._singleLineVerticalPadding),
child: new DefaultTextStyle(
style: contentTextStyle,
child: widget.content
)
)
)
};
if (widget.action != null)
{
childrenList.Add(new ButtonTheme(
textTheme: ButtonTextTheme.accent,
minWidth: 64.0f,
padding: EdgeInsets.symmetric(horizontal: snackBarPadding),
child: widget.action
));
}
else
{
childrenList.Add(new SizedBox(width: snackBarPadding));
}
Widget snackBar = new SafeArea(
top: false,
bottom: !isFloatingSnackBar,
child: new Row(
crossAxisAlignment: CrossAxisAlignment.center,
children: childrenList
)
);
float elevation = widget.elevation ?? snackBarTheme.elevation ?? 6.0f;
Color backgroundColor =
widget.backgroundColor ?? snackBarTheme.backgroundColor ?? inverseTheme.backgroundColor;
ShapeBorder shape = widget.shape
?? snackBarTheme.shape
?? (isFloatingSnackBar
? new RoundedRectangleBorder(borderRadius: BorderRadius.circular(4.0f))
: null);
snackBar = new Material(
shape: shape,
elevation: elevation,
color: backgroundColor,
child: new Theme(
data: inverseTheme,
child: mediaQueryData.accessibleNavigation
? snackBar
: new FadeTransition(
opacity: fadeOutAnimation,
child: snackBar
)
)
);
if (isFloatingSnackBar)
{
snackBar = new Padding(
padding: EdgeInsets.fromLTRB(15.0f, 5.0f, 15.0f, 10.0f),
child: snackBar
);
}
snackBar = new Dismissible(
key: Key.key("dismissible"),
direction: DismissDirection.down,
resizeDuration: null,
onDismissed: (DismissDirection? direction) => {
Scaffold.of(context).removeCurrentSnackBar(reason: SnackBarClosedReason.swipe);
},
child: snackBar
);
Widget snackBarTransition = null;
if (mediaQueryData.accessibleNavigation)
{
snackBarTransition = snackBar;
}
else if (isFloatingSnackBar)
{
snackBarTransition = new FadeTransition(
opacity: fadeInAnimation,
child: snackBar
);
}
else
{
snackBarTransition = new AnimatedBuilder(
animation: heightAnimation,
builder: (BuildContext subContext, Widget subChild) => {
return(new Align(
alignment: AlignmentDirectional.topStart,
heightFactor: heightAnimation.value,
child: subChild
));
},
child: snackBar
);
}
return(new ClipRect(child: snackBarTransition));
}
public override Widget build(BuildContext context)
{
MediaQueryData mediaQueryData = MediaQuery.of(context);
D.assert(this.animation != null);
ThemeData theme = Theme.of(context);
ThemeData darkTheme = new ThemeData(
brightness: Brightness.dark,
accentColor: theme.accentColor,
accentColorBrightness: theme.accentColorBrightness
);
List <Widget> children = new List <Widget> {
new SizedBox(width: SnackBarUtils._kSnackBarPadding),
new Expanded(
child: new Container(
padding: EdgeInsets.symmetric(vertical: SnackBarUtils._kSingleLineVerticalPadding),
child: new DefaultTextStyle(
style: darkTheme.textTheme.subhead,
child: this.content)
)
)
};
if (this.action != null)
{
children.Add(ButtonTheme.bar(
padding: EdgeInsets.symmetric(horizontal: SnackBarUtils._kSnackBarPadding),
textTheme: ButtonTextTheme.accent,
child: this.action
));
}
else
{
children.Add(new SizedBox(width: SnackBarUtils._kSnackBarPadding));
}
CurvedAnimation heightAnimation =
new CurvedAnimation(parent: this.animation, curve: SnackBarUtils._snackBarHeightCurve);
CurvedAnimation fadeAnimation = new CurvedAnimation(parent: this.animation,
curve: SnackBarUtils._snackBarFadeCurve, reverseCurve: new Threshold(0.0f));
Widget snackbar = new SafeArea(
top: false,
child: new Row(
children: children,
crossAxisAlignment: CrossAxisAlignment.center
)
);
snackbar = new Dismissible(
key: Key.key("dismissible"),
direction: DismissDirection.down,
resizeDuration: null,
onDismissed: (DismissDirection? direction) => {
Scaffold.of(context).removeCurrentSnackBar(reason: SnackBarClosedReason.swipe);
},
child: new Material(
elevation: 6.0f,
color: this.backgroundColor ?? SnackBarUtils._kSnackBackground,
child: new Theme(
data: darkTheme,
child: mediaQueryData.accessibleNavigation
? snackbar
: new FadeTransition(
opacity: fadeAnimation,
child: snackbar
)
)
)
);
return(new ClipRect(
child: mediaQueryData.accessibleNavigation
? snackbar
: new AnimatedBuilder(
animation: heightAnimation,
builder: (BuildContext subContext, Widget child) => {
return new Align(
alignment: Alignment.topLeft,
heightFactor: heightAnimation.value,
child: child
);
},
child: snackbar
)
));
}