snap 0.1.0 
snap: ^0.1.0 copied to clipboard
cosmossoftware.coffeeAn extensive snap tool/widget for Flutter.
//@formatter:off
import 'package:flutter/foundation.dart';
import 'package:flutter/cupertino.dart';
import 'package:flutter/gestures.dart';
import 'package:flutter/material.dart';
import 'package:snap/snap.dart';
List<GlobalKey> bounds = List<GlobalKey>();
List<GlobalKey> views = List<GlobalKey>();
void main() => runApp(MyApp());
class MyApp extends StatelessWidget {
@override
Widget build(BuildContext context) {
return MaterialApp(
title: 'Snap Demo',
theme: ThemeData(primarySwatch: Colors.blue,),
home: MyHomePage(title: 'Snap Demo'));
}
}
class MyHomePage extends StatefulWidget {
MyHomePage({Key key, this.title}) : super(key: key);
final String title;
@override
_MyHomePageState createState() => _MyHomePageState();
}
class _MyHomePageState extends State<MyHomePage> {
double bottom=-200.0;
@override
void initState() {
super.initState();
for(int i=0; i<6; i++){
bounds.add(GlobalKey());
views.add(GlobalKey());
}
}
void snap(_){
Scaffold.of(context).showSnackBar(SnackBar(content: Text("Snapped!")));
}
@override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(title: Text(widget.title)),
body: PageView(
onPageChanged: (int index){
if(index == 1)
setState(() {
bottom=0.0;
});
else
setState(() {
bottom=-200.0;
});
},
children: [
Scaffold(
body: Column(
crossAxisAlignment: CrossAxisAlignment.start,
children: [
description("The box will snap to the corners or the center."),
gap(),
Expanded(child:Container(
key: bounds[0],
constraints: BoxConstraints.expand(),
color: Colors.transparent,
child: Column(
crossAxisAlignment: CrossAxisAlignment.start,
children:[
SnapController(
normalBox(
views[0],
"Move & Snap",
Colors.redAccent),
false,
views[0],
bounds[0],
Offset(0.0, 0.0),
Offset(1.0, 1.0),
Offset(0.75, 0.75),
Offset(0.75, 0.75),
snapTargets: [
SnapTarget(Pivot.topLeft, Pivot.topLeft),
SnapTarget(Pivot.topRight, Pivot.topRight),
SnapTarget(Pivot.bottomLeft, Pivot.bottomLeft),
SnapTarget(Pivot.bottomRight, Pivot.bottomRight),
SnapTarget(Pivot.center, Pivot.center)
],
animateSnap: true)
])))
])),
Scaffold(
body: Column(
crossAxisAlignment: CrossAxisAlignment.start,
children: [
description("The box will snap to the closest side regardless of animation."),
gap(),
Expanded(child:Container(
key: bounds[1],
constraints: BoxConstraints.expand(),
color: Colors.transparent,
child: Stack(
children:[
AnimatedPositioned(
left: 0,
bottom: bottom,
duration: Duration(milliseconds: 300),
child:SnapController(
normalBox(
views[1],
"Move & Snap",
Colors.redAccent),
false,
views[1],
bounds[1],
Offset(0.0, 0.0),
Offset(1.0, 1.0),
Offset(0.75, 0.75),
Offset(0.75, 0.75),
snapTargets: [
SnapTarget(Pivot.closestAny, Pivot.closestAny)
],
animateSnap: true))
])))
])),
Scaffold(
body: Column(
crossAxisAlignment: CrossAxisAlignment.start,
children: [
description("The box will snap to the closest matching color."),
gap(),
Expanded(child:Container(
key: bounds[2],
constraints: BoxConstraints.expand(),
color: Colors.transparent,
child: Stack(
children: [
Column(
crossAxisAlignment: CrossAxisAlignment.start,
children:[
SnapController(
dottedBox(
views[2],
"Move & Snap",
Colors.redAccent),
false,
views[2],
bounds[2],
Offset(0.0, 0.0),
Offset(1.0, 1.0),
Offset(0.75, 0.75),
Offset(0.75, 0.75),
snapTargets: [
SnapTarget(Offset(0.1,0.1), Offset(0.1,0.1)),
SnapTarget(Offset(0.9,0.1), Offset(0.85,0.465)),
SnapTarget(Offset(0.1,0.9), Offset(0.1,0.9)),
],
animateSnap: true)]),
Align(alignment: Alignment(-0.85,-0.85),child: Container(width: 10,height: 10, color: Colors.orangeAccent)),
Align(alignment: Alignment(0.75,-0.1),child: Container(width: 10,height: 10, color: Colors.black)),
Align(alignment: Alignment(-0.85,0.85),child: Container(width: 10,height: 10, color: Colors.deepPurpleAccent))
])))
])),
Scaffold(
body: Column(
crossAxisAlignment: CrossAxisAlignment.start,
children: [
description("The box will snap to the corners or the center while maintaining the initial offset"),
gap(),
Expanded(child:Container(
key: bounds[3],
constraints: BoxConstraints.expand(),
color: Colors.transparent,
child: Column(
crossAxisAlignment: CrossAxisAlignment.center,
children:[
SnapController(
translatedBox(
views[3],
"Move & Snap",
Colors.redAccent),
false,
views[3],
bounds[3],
Offset(50.0/MediaQuery.of(context).size.width, 50.0/MediaQuery.of(context).size.height),
Offset(1.0,1.0)-Offset(50.0/MediaQuery.of(context).size.width, 50.0/MediaQuery.of(context).size.height),
Offset(0.75, 0.75),
Offset(0.75, 0.75),
snapTargets: [
SnapTarget(Pivot.topLeft, Offset(50.0/MediaQuery.of(context).size.width, 50.0/MediaQuery.of(context).size.height)),
SnapTarget(Pivot.topRight, Offset(1.0 - 50.0/MediaQuery.of(context).size.width, 50.0/MediaQuery.of(context).size.height)),
SnapTarget(Pivot.bottomLeft, Offset(50.0/MediaQuery.of(context).size.width, 1.0 - 50.0/MediaQuery.of(context).size.height)),
SnapTarget(Pivot.bottomRight, Offset(1.0,1.0)-Offset(50.0/MediaQuery.of(context).size.width, 50.0/MediaQuery.of(context).size.height)),
SnapTarget(Pivot.center, Pivot.center)
],
animateSnap: true)
])))
])),
Scaffold(
body: Column(
crossAxisAlignment: CrossAxisAlignment.start,
children: [
description("The box will snap to the closest side or the center within its container."),
gap(),
Center(child:Container(
key: bounds[4],
width: 300,
height: 300,
color: Colors.orangeAccent,
child: Column(
crossAxisAlignment: CrossAxisAlignment.start,
children:[
SnapController(
smallBox(
views[4],
"*",
Colors.redAccent),
false,
views[4],
bounds[4],
Offset(0.0, 0.0),
Offset(1.0, 1.0),
Offset(0.75, 0.75),
Offset(0.75, 0.75),
snapTargets: [
SnapTarget(Pivot.closestAny, Pivot.closestAny),
SnapTarget(Pivot.center, Pivot.center)
],
animateSnap: true,
onSnap: snap)
])))
])),
Scaffold(
body: Column(
crossAxisAlignment: CrossAxisAlignment.start,
children: [
description("The box will snap to the corners or the center without animation."),
gap(),
Expanded(child:Container(
key: bounds[5],
constraints: BoxConstraints.expand(),
color: Colors.transparent,
child: Column(
crossAxisAlignment: CrossAxisAlignment.start,
children:[
SnapController(
normalBox(
views[5],
"Move & Snap",
Colors.redAccent),
false,
views[5],
bounds[5],
Offset(0.0, 0.0),
Offset(1.0, 1.0),
Offset(0.75, 0.75),
Offset(0.75, 0.75),
snapTargets: [
SnapTarget(Pivot.topLeft, Pivot.topLeft),
SnapTarget(Pivot.topRight, Pivot.topRight),
SnapTarget(Pivot.bottomLeft, Pivot.bottomLeft),
SnapTarget(Pivot.bottomRight, Pivot.bottomRight),
SnapTarget(Pivot.center, Pivot.center)
],
animateSnap: false)
])))
])),
]));
}
}
Widget description(String text){
return Container(
constraints: BoxConstraints.expand(height:75),
color: Colors.green,
child: Center(child:Padding(
padding: EdgeInsets.all(10),
child:Text(
text,
style: TextStyle(
color: Colors.white,
fontWeight: FontWeight.bold,
fontSize: 15),
textAlign: TextAlign.center))));
}
Widget gap(){
return Container(
constraints: BoxConstraints.expand(height:25),
color: Colors.transparent,
child: Center(child:Text(
"- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - ",
style: TextStyle(
color: Colors.black,
fontWeight: FontWeight.bold,
fontSize: 10),
textAlign: TextAlign.center)));
}
Widget normalBox(Key key, String text, Color color){
return Container(
key: key,
width: 200,
height: 200,
color: Colors.transparent,
child: Padding(
padding: EdgeInsets.all(5),
child: Container(
constraints: BoxConstraints.expand(),
decoration: BoxDecoration(
color: color,
borderRadius: const BorderRadius.all(const Radius.circular(10.0))),
child: Center(child:Text(
text,
style: TextStyle(
color: Colors.white,
fontWeight: FontWeight.bold,
fontSize: 25))))));
}
Widget translatedBox(Key key, String text, Color color){
return Transform.translate(
offset: Offset(50,50),
child: Container(
key: key,
width: 200,
height: 200,
color: Colors.transparent,
child: Padding(
padding: EdgeInsets.all(5),
child: Container(
constraints: BoxConstraints.expand(),
decoration: BoxDecoration(
color: color,
borderRadius: const BorderRadius.all(const Radius.circular(10.0))),
child: Center(child:Text(
text,
style: TextStyle(
color: Colors.white,
fontWeight: FontWeight.bold,
fontSize: 25)))))));
}
Widget smallBox(Key key, String text, Color color){
return Container(
key: key,
width: 50,
height: 50,
color: Colors.transparent,
child: Padding(
padding: EdgeInsets.all(5),
child: Container(
constraints: BoxConstraints.expand(),
decoration: BoxDecoration(
color: color,
borderRadius: const BorderRadius.all(const Radius.circular(0.0))),
child: Center(child:Text(
text,
style: TextStyle(
color: Colors.white,
fontWeight: FontWeight.bold,
fontSize: 25))))));
}
Widget dottedBox(Key key, String text, Color color){
return Transform.translate(
offset: Offset(75,100),
child: Container(
key: key,
width: 200,
height: 200,
color: Colors.transparent,
child: Stack(
children: [
Padding(
padding: EdgeInsets.all(5),
child: Container(
constraints: BoxConstraints.expand(),
decoration: BoxDecoration(
color: color,
borderRadius: const BorderRadius.all(const Radius.circular(10.0))),
child: Center(child:Text(
text,
style: TextStyle(
color: Colors.white,
fontWeight: FontWeight.bold,
fontSize: 25))))),
Align(alignment: Alignment(-0.9,-0.9),child: Container(width: 10,height: 10, color: Colors.orangeAccent)),
Align(alignment: Alignment(0.9,-0.9),child: Container(width: 10,height: 10, color: Colors.black)),
Align(alignment: Alignment(-0.9,0.9),child: Container(width: 10,height: 10, color: Colors.deepPurpleAccent))
]
)));
}
//@formatter:onMetadata
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pub points
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popularity
Publisher
Metadata
An extensive snap tool/widget for Flutter.
Homepage
Repository (GitHub)
View/report issues
License
unknown (LICENSE)
