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Fancy Button made for Flutter Games and Apps
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import 'package:flutter/material.dart'; | |
class FancyButton extends StatefulWidget { | |
const FancyButton({ | |
Key key, | |
@required this.child, | |
@required this.size, | |
@required this.color, | |
this.duration = const Duration(milliseconds: 160), | |
this.onPressed, | |
}) : super(key: key); | |
final Widget child; | |
final Color color; | |
final Duration duration; | |
final VoidCallback onPressed; | |
final double size; | |
@override | |
_FancyButtonState createState() => _FancyButtonState(); | |
} | |
class _FancyButtonState extends State<FancyButton> with TickerProviderStateMixin { | |
AnimationController _animationController; | |
Animation<double> _pressedAnimation; | |
TickerFuture _downTicker; | |
double get buttonDepth => widget.size * 0.2; | |
void _setupAnimation() { | |
_animationController?.stop(); | |
final oldControllerValue = _animationController?.value ?? 0.0; | |
_animationController?.dispose(); | |
_animationController = AnimationController( | |
duration: Duration(microseconds: widget.duration.inMicroseconds ~/ 2), | |
vsync: this, | |
value: oldControllerValue, | |
); | |
_pressedAnimation = Tween<double>(begin: -buttonDepth, end: 0.0).animate( | |
CurvedAnimation(parent: _animationController, curve: Curves.easeInOut), | |
); | |
} | |
@override | |
void didUpdateWidget(FancyButton oldWidget) { | |
super.didUpdateWidget(oldWidget); | |
if (oldWidget.duration != widget.duration) { | |
_setupAnimation(); | |
} | |
} | |
@override | |
void didChangeDependencies() { | |
super.didChangeDependencies(); | |
_setupAnimation(); | |
} | |
@override | |
void dispose() { | |
_animationController.dispose(); | |
super.dispose(); | |
} | |
void _onTapDown(_) { | |
if (widget.onPressed != null) { | |
_downTicker = _animationController.animateTo(1.0); | |
} | |
} | |
void _onTapUp(_) { | |
if (widget.onPressed != null) { | |
_downTicker.whenComplete(() { | |
_animationController.animateTo(0.0); | |
widget.onPressed?.call(); | |
}); | |
} | |
} | |
void _onTapCancel() { | |
if (widget.onPressed != null) { | |
_animationController.reset(); | |
} | |
} | |
@override | |
Widget build(BuildContext context) { | |
final vertPadding = widget.size * 0.25; | |
final horzPadding = widget.size * 0.50; | |
final radius = BorderRadius.circular(horzPadding * 0.5); | |
return Container( | |
padding: widget.onPressed != null ? EdgeInsets.only(bottom: 2, left: 0.5, right: 0.5) : null, | |
decoration: BoxDecoration( | |
color: Colors.black87, | |
borderRadius: radius, | |
), | |
child: GestureDetector( | |
onTapDown: _onTapDown, | |
onTapUp: _onTapUp, | |
onTapCancel: _onTapCancel, | |
child: IntrinsicWidth( | |
child: IntrinsicHeight( | |
child: Stack( | |
children: <Widget>[ | |
Container( | |
decoration: BoxDecoration( | |
color: _hslRelativeColor(s: -0.20, l: -0.20), | |
borderRadius: radius, | |
), | |
), | |
AnimatedBuilder( | |
animation: _pressedAnimation, | |
builder: (BuildContext context, Widget child) { | |
return Transform.translate( | |
offset: Offset(0.0, _pressedAnimation.value), | |
child: child, | |
); | |
}, | |
child: Stack( | |
overflow: Overflow.visible, | |
children: <Widget>[ | |
ClipRRect( | |
borderRadius: radius, | |
child: Stack( | |
children: <Widget>[ | |
DecoratedBox( | |
decoration: BoxDecoration( | |
color: _hslRelativeColor(l: 0.06), | |
borderRadius: radius, | |
), | |
child: SizedBox.expand(), | |
), | |
Transform.translate( | |
offset: Offset(0.0, vertPadding * 2), | |
child: DecoratedBox( | |
decoration: BoxDecoration( | |
color: _hslRelativeColor(), | |
borderRadius: radius, | |
), | |
child: SizedBox.expand(), | |
), | |
), | |
], | |
), | |
), | |
Padding( | |
padding: EdgeInsets.symmetric( | |
vertical: vertPadding, | |
horizontal: horzPadding, | |
), | |
child: widget.child, | |
) | |
], | |
), | |
), | |
], | |
), | |
), | |
), | |
), | |
); | |
} | |
Color _hslRelativeColor({double h = 0.0, s = 0.0, l = 0.0}) { | |
final hslColor = HSLColor.fromColor(widget.color); | |
h = (hslColor.hue + h).clamp(0.0, 360.0); | |
s = (hslColor.saturation + s).clamp(0.0, 1.0); | |
l = (hslColor.lightness + l).clamp(0.0, 1.0); | |
return HSLColor.fromAHSL(hslColor.alpha, h, s, l).toColor(); | |
} | |
} | |
// USAGE - Fancy Button | |
// Simple Text - Non Clickable | |
FancyButton( | |
child: Text( | |
"Your Amazing Text", | |
style: Utils.textStyle(18.0), | |
), | |
size: 18, | |
color: Color(0xFFCA3034), | |
), | |
// Complex Button - Clickable | |
FancyButton( | |
child: Text( | |
"X", | |
textAlign: TextAlign.center, | |
style: TextStyle( | |
color: Colors.white, | |
fontSize: 18, | |
fontFamily: 'Gameplay', | |
), | |
), | |
size: 25, | |
color: Color(0xFFCA3034), | |
onPressed: () { | |
Navigator.of(context).pop(); | |
}, | |
), |
nice its help me a lot 😁
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Thank you so much for sharing this 🙏🏻, Here's a complete example app, if you want to quickly see the result on dartpad.
code sample