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Added colors #5

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74 changes: 29 additions & 45 deletions lib/src/stepper.dart
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Original file line number Diff line number Diff line change
Expand Up @@ -5,40 +5,37 @@ import 'package:flutter/physics.dart';
/// from [Nikolay Kuchkarov](https://dribbble.com/shots/3368130-Stepper-Touch).
/// i extended the functionality to be more useful in real world applications
class StepperTouch extends StatefulWidget {
const StepperTouch({
Key key,
this.initialValue,
this.onChanged,
this.direction = Axis.horizontal,
this.withSpring = true,
this.counterColor = const Color(0xFF6D72FF),
this.dragButtonColor = Colors.white,
this.buttonsColor = Colors.white,
}) : super(key: key);
const StepperTouch(
{Key key,
this.initialValue,
this.onChanged,
this.direction = Axis.horizontal,
this.withSpring = true,
this.primaryColor = const Color(0xFF6D72FF),
this.textColor = const Color(0xFF6D72FF)})
: super(key: key);

/// the orientation of the stepper its horizontal or vertical.
final Axis direction;

/// the initial value of the stepper
final int initialValue;

///For Color
final primaryColor, textColor;

/// called whenever the value of the stepper changed
final ValueChanged<int> onChanged;

/// if you want a springSimulation to happens the the user let go the stepper
/// defaults to true
final bool withSpring;

final Color counterColor;
final Color dragButtonColor;
final Color buttonsColor;

@override
_Stepper2State createState() => _Stepper2State();
}

class _Stepper2State extends State<StepperTouch>
with SingleTickerProviderStateMixin {
class _Stepper2State extends State<StepperTouch> with SingleTickerProviderStateMixin {
AnimationController _controller;
Animation _animation;
int _value;
Expand All @@ -49,17 +46,14 @@ class _Stepper2State extends State<StepperTouch>
void initState() {
super.initState();
_value = widget.initialValue ?? 0;
_controller =
AnimationController(vsync: this, lowerBound: -0.5, upperBound: 0.5);
_controller = AnimationController(vsync: this, lowerBound: -0.5, upperBound: 0.5);
_controller.value = 0.0;
_controller.addListener(() {});

if (widget.direction == Axis.horizontal) {
_animation = Tween<Offset>(begin: Offset(0.0, 0.0), end: Offset(1.5, 0.0))
.animate(_controller);
_animation = Tween<Offset>(begin: Offset(0.0, 0.0), end: Offset(1.5, 0.0)).animate(_controller);
} else {
_animation = Tween<Offset>(begin: Offset(0.0, 0.0), end: Offset(0.0, 1.5))
.animate(_controller);
_animation = Tween<Offset>(begin: Offset(0.0, 0.0), end: Offset(0.0, 1.5)).animate(_controller);
}
}

Expand All @@ -73,11 +67,9 @@ class _Stepper2State extends State<StepperTouch>
void didUpdateWidget(oldWidget) {
super.didUpdateWidget(oldWidget);
if (widget.direction == Axis.horizontal) {
_animation = Tween<Offset>(begin: Offset(0.0, 0.0), end: Offset(1.5, 0.0))
.animate(_controller);
_animation = Tween<Offset>(begin: Offset(0.0, 0.0), end: Offset(1.5, 0.0)).animate(_controller);
} else {
_animation = Tween<Offset>(begin: Offset(0.0, 0.0), end: Offset(0.0, 1.5))
.animate(_controller);
_animation = Tween<Offset>(begin: Offset(0.0, 0.0), end: Offset(0.0, 1.5)).animate(_controller);
}
}

Expand All @@ -91,20 +83,19 @@ class _Stepper2State extends State<StepperTouch>
type: MaterialType.canvas,
clipBehavior: Clip.antiAlias,
borderRadius: BorderRadius.circular(60.0),
color: Colors.white.withOpacity(0.2),
color: widget.primaryColor.withOpacity(0.2),
child: Stack(
alignment: Alignment.center,
children: <Widget>[
Positioned(
left: widget.direction == Axis.horizontal ? 10.0 : null,
bottom: widget.direction == Axis.horizontal ? null : 10.0,
child:
Icon(Icons.remove, size: 40.0, color: widget.buttonsColor),
child: Icon(Icons.remove, size: 40.0, color: widget.primaryColor),
),
Positioned(
right: widget.direction == Axis.horizontal ? 10.0 : null,
top: widget.direction == Axis.horizontal ? null : 10.0,
child: Icon(Icons.add, size: 40.0, color: widget.buttonsColor),
child: Icon(Icons.add, size: 40.0, color: widget.primaryColor),
),
GestureDetector(
onHorizontalDragStart: _onPanStart,
Expand All @@ -113,22 +104,19 @@ class _Stepper2State extends State<StepperTouch>
child: SlideTransition(
position: _animation,
child: Material(
color: widget.dragButtonColor,
color: widget.primaryColor,
shape: const CircleBorder(),
elevation: 5.0,
child: Center(
child: AnimatedSwitcher(
duration: const Duration(milliseconds: 500),
transitionBuilder:
(Widget child, Animation<double> animation) {
return ScaleTransition(
child: child, scale: animation);
transitionBuilder: (Widget child, Animation<double> animation) {
return ScaleTransition(child: child, scale: animation);
},
child: Text(
'$_value',
key: ValueKey<int>(_value),
style: TextStyle(
color: widget.counterColor, fontSize: 56.0),
style: TextStyle(color: widget.textColor, fontSize: 56.0),
),
),
),
Expand Down Expand Up @@ -175,22 +163,18 @@ class _Stepper2State extends State<StepperTouch>
changed = true;
}
if (widget.withSpring) {
final SpringDescription _kDefaultSpring =
new SpringDescription.withDampingRatio(
final SpringDescription _kDefaultSpring = new SpringDescription.withDampingRatio(
mass: 0.9,
stiffness: 250.0,
ratio: 0.6,
);
if (widget.direction == Axis.horizontal) {
_controller.animateWith(
SpringSimulation(_kDefaultSpring, _startAnimationPosX, 0.0, 0.0));
_controller.animateWith(SpringSimulation(_kDefaultSpring, _startAnimationPosX, 0.0, 0.0));
} else {
_controller.animateWith(
SpringSimulation(_kDefaultSpring, _startAnimationPosY, 0.0, 0.0));
_controller.animateWith(SpringSimulation(_kDefaultSpring, _startAnimationPosY, 0.0, 0.0));
}
} else {
_controller.animateTo(0.0,
curve: Curves.bounceOut, duration: Duration(milliseconds: 500));
_controller.animateTo(0.0, curve: Curves.bounceOut, duration: Duration(milliseconds: 500));
}

if (changed && widget.onChanged != null) {
Expand Down