GitLocker: The Coding Marketplace

Description:

animated widgets

animated_widgets #
Easily add animations on your screen with AnimatedWidgets.
Optimized for MVVM using Bloc, updating the enabled value of the widget will forward or reverse the animation.
Available widgets : TranslationAnimatedWidget, OpacityAnimatedWidget, RotationAnimatedWidget, ScaleAnimatedWidget, SizeAnimatedWidget
For example : add a TranslationAnimatedWidget on a button, then activate it to display it !
TranslationAnimatedWidget(
enabled: this.displayMyWidget, //update this boolean to forward/reverse the animation
values: [
Offset(0, 200), // disabled value value
Offset(0, 250), //intermediate value
Offset(0, 0) //enabled value
],
child: /* your widget */
),
copied to clipboard

or using a tween constructor
RotationAnimatedWidget.tween(
enabled: this.displayMyWidget, //update this boolean to forward/reverse the animation
rotationDisabled: Rotation.degrees(z: 0),
rotationEnabled: Rotation.degrees(z: 90),
child: /* your widget */
),
copied to clipboard

Compose #
Don't hesitate to compose them
TranslationAnimatedWidget.tween(
enabled: this.displayMyWidget,
translationDisabled: Offset(0, 200),
translationEnabled: Offset(0, 0),
child:
OpacityAnimatedWidget.tween(
enabled: this.displayMyWidget,
opacityDisabled: 0,
opacityEnabled: 1,
child: /* your widget */
),
),
copied to clipboard

Opacity #

Example using a Stateful Widget
class _StatefulScreenState extends State<StatefulScreen> {

// will determine if the opacity animation is launched
bool _display = false;

@override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(),
body: Column(
crossAxisAlignment: CrossAxisAlignment.stretch,
mainAxisAlignment: MainAxisAlignment.center,
mainAxisSize: MainAxisSize.max,
children: [

//wrap your widget with OpacityAnimatedWidget
OpacityAnimatedWidget.tween(
opacityEnabled: 1, //define start value
opacityDisabled: 0, //and end value
enabled: _display, //bind with the boolean
child: Container(
height: 200,
width: 200,
child: FlutterLogo(
style: FlutterLogoStyle.stacked,
),
),
),

RaisedButton(
color: Colors.blue,
child: Text(
_display ? "hide logo" : "display logo",
style: TextStyle(color: Colors.white),
),
onPressed: () {
setState(() {

//will fire the animation
_display = !_display;

});
},
)
],
),
);
}
}
copied to clipboard
Translation #

Example using bloc pattern
class FirstScreenBloc extends Bloc {
final _viewState = BehaviorSubject<FirstScreenViewState>.seeded(FirstScreenViewState());
Observable<FirstScreenViewState> get viewState => _viewState;

void onClicked() {
_viewState.add(FirstScreenViewState(buttonVisible: true));
}

void onDismissClicked() {
_viewState.add(FirstScreenViewState(buttonVisible: false));
}

@override
void dispose() {
_viewState.close();
}
}

class FirstScreenViewState {
final bool buttonVisible;

const FirstScreenViewState({
this.buttonVisible = false,
});
}
copied to clipboard
class FirstScreenView extends StatelessWidget {
@override
Widget build(BuildContext context) {
final bloc = BlocProvider.of<FirstScreenBloc>(context);

return StreamBuilder<FirstScreenViewState>(
stream: bloc.viewState,
builder: (context, snapshot) {

final viewState = snapshot.data;

return Stack(
fit: StackFit.expand,
children: [
_buildInputButton(onClicked: () {
bloc.onClicked();
}),
Positioned(
bottom: 20,
left: 20,
right: 20,

child: TranslationAnimatedWidget(
enabled: viewState.buttonVisible, //will forward/reverse the animation
curve: Curves.easeIn,
duration: Duration(seconds: 1),
values: [
Offset(0, 200),
Offset(0, -50),
Offset(0, 0),
],
child: RaisedButton(
onPressed: () {
bloc.onDismissClicked();
},
child: Text("Dismiss"),
),

),
),
],
);
}
);
}
}
copied to clipboard
Rotation #

RotationAnimatedWidget.tween(
enabled: enabled,
rotationDisabled: Rotation.deg(),
rotationEnabled: Rotation.deg(z: 90, x: 80),
child: /* your widget */
),

RotationAnimatedWidget.tween(
enabled: enabled,
rotation: Rotation.deg(),
rotationEnabled: Rotation.deg(z: 90, x: 80),
child: /* your widget */
),
copied to clipboard
Scale #
ScaleAnimatedWidget.tween(
enabled: this._enabled,
duration: Duration(milliseconds: 600),
scaleDisabled: 0.5,
scaleEnabled: 1,

//your widget
child: Container(
height: 200,
width: 200,
child: FlutterLogo(
style: FlutterLogoStyle.stacked,
),
),
),
copied to clipboard

Size #
SizeAnimatedWidget(
enabled: this._enabled,
duration: Duration(milliseconds: 1500),
values: [Size(100, 100), Size(100, 150), Size(200, 150), Size(200, 200)],
curve: Curves.linear,

//your widget
child: Container(
decoration: BoxDecoration(
border: Border.all(color: Colors.blue)
),
child: FlutterLogo(
style: FlutterLogoStyle.stacked,
),
),
),
copied to clipboard

Shake #
ShakeAnimatedWidget(
enabled: this._enabled,
duration: Duration(milliseconds: 1500),
shakeAngle: Rotation.deg(z: 40),
curve: Curves.linear,
child: FlutterLogo(
style: FlutterLogoStyle.stacked,
),
),
copied to clipboard

Custom Animated #
CustomAnimatedWidget(
enabled: this._enabled,
duration: Duration(seconds: 3),
curve: Curves.easeOut,
builder: (context, percent) { //for custom animation, use builders
final int displayedDate = (2018 * percent).floor();
return Text(
"current year : $displayedDate",
style: TextStyle(color: Colors.blue),
);
},
),
copied to clipboard

Flutter Package #
Animated widget is available at
https://pub.dev/packages/animated_widgets
dependencies:
animated_widgets:
copied to clipboard
Getting Started with Flutter #
For help getting started with Flutter, view our
online documentation, which offers tutorials,
samples, guidance on mobile development, and a full API reference.
License #
Copyright 2019 florent37, Inc.

Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at

http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
copied to clipboard