Skip to content

Update value on icon's tap and set 'signed' option #8

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Open
scheinpablo wants to merge 3 commits into
base: master
Choose a base branch
from
Open

Update value on icon's tap and set 'signed' option #8

Changes from all commits
Commits
Show all changes
3 commits
Select commit Hold shift + click to select a range
597b200
Update value on icon's tap
scheinpablo Dec 29, 2020
edbfebd
Added 'signed' option.
scheinpablo Mar 18, 2021
042f449
Solved warning. Improved sintax.
scheinpablo Mar 18, 2021
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
87 changes: 56 additions & 31 deletions lib/src/stepper.dart
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -5,16 +5,17 @@ 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.counterColor = const Color(0xFF6D72FF),
this.dragButtonColor = Colors.white,
this.buttonsColor = Colors.white,
this.signed = false})
: super(key: key);

/// the orientation of the stepper its horizontal or vertical.
final Axis direction;
Expand All @@ -28,23 +29,21 @@ class StepperTouch extends StatefulWidget {
/// 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;

final bool signed;
@override
_Stepper2State createState() => _Stepper2State();
}

class _Stepper2State extends State<StepperTouch>
with SingleTickerProviderStateMixin {
AnimationController _controller;
Animation _animation;
Animation<Offset> _animation;
int _value;
double _startAnimationPosX;
double _startAnimationPosY;

@override
void initState() {
super.initState();
Expand All @@ -53,12 +52,11 @@ class _Stepper2State extends State<StepperTouch>
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))
_animation = Tween<Offset>(begin: const Offset(0.0, 0.0), end: const Offset(1.5, 0.0))
.animate(_controller);
} else {
_animation = Tween<Offset>(begin: Offset(0.0, 0.0), end: Offset(0.0, 1.5))
_animation = Tween<Offset>(begin: const Offset(0.0, 0.0), end: const Offset(0.0, 1.5))
.animate(_controller);
}
}
Expand All @@ -70,13 +68,13 @@ class _Stepper2State extends State<StepperTouch>
}

@override
void didUpdateWidget(oldWidget) {
void didUpdateWidget(StepperTouch oldWidget) {
super.didUpdateWidget(oldWidget);
if (widget.direction == Axis.horizontal) {
_animation = Tween<Offset>(begin: Offset(0.0, 0.0), end: Offset(1.5, 0.0))
_animation = Tween<Offset>(begin: const Offset(0.0, 0.0), end: const Offset(1.5, 0.0))
.animate(_controller);
} else {
_animation = Tween<Offset>(begin: Offset(0.0, 0.0), end: Offset(0.0, 1.5))
_animation = Tween<Offset>(begin: const Offset(0.0, 0.0), end: const Offset(0.0, 1.5))
.animate(_controller);
}
}
Expand All @@ -98,13 +96,28 @@ class _Stepper2State extends State<StepperTouch>
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: GestureDetector(
onTap: () {
setState(() {
if (widget.signed || _value > 0) {
_value--;
}
});
},
child: Icon(Icons.remove,
size: 40.0, color: widget.buttonsColor)),
),
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: GestureDetector(
onTap: () {
setState(() {
_value++;
});
},
child: Icon(Icons.add,
size: 40.0, color: widget.buttonsColor)),
),
GestureDetector(
onHorizontalDragStart: _onPanStart,
Expand Down Expand Up @@ -143,8 +156,8 @@ class _Stepper2State extends State<StepperTouch>
}

double offsetFromGlobalPos(Offset globalPosition) {
RenderBox box = context.findRenderObject() as RenderBox;
Offset local = box.globalToLocal(globalPosition);
final RenderBox box = context.findRenderObject() as RenderBox;
final Offset local = box.globalToLocal(globalPosition);
_startAnimationPosX = ((local.dx * 0.75) / box.size.width) - 0.4;
_startAnimationPosY = ((local.dy * 0.75) / box.size.height) - 0.4;
if (widget.direction == Axis.horizontal) {
Expand All @@ -165,18 +178,31 @@ class _Stepper2State extends State<StepperTouch>

void _onPanEnd(DragEndDetails details) {
_controller.stop();
bool isHor = widget.direction == Axis.horizontal;
final bool isHor = widget.direction == Axis.horizontal;
bool changed = false;
if (_controller.value <= -0.20) {
setState(() => isHor ? _value-- : _value++);
setState(() {
if (isHor) {
if (widget.signed || _value > 0) {
_value--;
}
} else
_value++;
});
changed = true;
} else if (_controller.value >= 0.20) {
setState(() => isHor ? _value++ : _value--);
setState(() {
if (isHor) {
_value++;
} else if (widget.signed || _value > 0) {
_value--;
}
});
changed = true;
}
if (widget.withSpring) {
final SpringDescription _kDefaultSpring =
new SpringDescription.withDampingRatio(
SpringDescription.withDampingRatio(
mass: 0.9,
stiffness: 250.0,
ratio: 0.6,
Expand All @@ -190,9 +216,8 @@ class _Stepper2State extends State<StepperTouch>
}
} else {
_controller.animateTo(0.0,
curve: Curves.bounceOut, duration: Duration(milliseconds: 500));
curve: Curves.bounceOut, duration: const Duration(milliseconds: 500));
}

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