frefresh 1.1.0 
frefresh: ^1.1.0 copied to clipboard
Help you to build pull-down refresh and pull-up loading in the simplest way.
import 'dart:async';
import 'dart:math';
import 'dart:ui';
import 'package:ffloat/ffloat.dart';
import 'package:flutter/material.dart';
import 'package:fradio/fradio.dart';
import 'package:frefresh/frefresh.dart';
import 'package:frefresh_example/part.dart';
import 'package:fsuper/fsuper.dart';
import 'package:fradio/fradio.dart';
import 'color.dart';
void main() => runApp(MyApp());
class MyApp extends StatefulWidget {
@override
_MyAppState createState() => _MyAppState();
}
class _MyAppState extends State<MyApp> {
FRefreshController controller1;
FRefreshController controller2;
FRefreshController controller3;
FRefreshController controller4;
FRefreshController controller5;
bool canLoad = true;
int clickCount = 0;
int itemCount1 = 2;
int itemCount2 = 4;
int itemCount3 = 1;
int itemCount4 = 2;
int itemCount5 = 15;
double groupValue = 1.0;
String image2 = "assets/icon_refresh11.gif";
String text4 = "Drop-down to loading";
Color textColor;
List<Color> colorList;
@override
void initState() {
super.initState();
textColor = mainBackgroundColor;
colorList = [
mainBackgroundColor,
Color(0xffffebee),
Color(0xffd1c4e9),
Color(0xffbbdefb),
Color(0xffc8e6c9),
Color(0xffffe0b2),
Color(0xffffccbc),
];
// FRefresh.debug = true;
controller1 = FRefreshController();
controller1.setOnStateChangedCallback((state) {
print('state = $state');
if (state is RefreshState) {}
});
controller1.setOnScrollListener((metrics) {});
controller2 = FRefreshController();
controller2.setOnStateChangedCallback((state) {
print('state = $state');
});
controller3 = FRefreshController();
controller3.setOnStateChangedCallback((state) {
print('state = $state');
});
controller4 = FRefreshController();
controller5 = FRefreshController();
controller5.setOnStateChangedCallback((state) {
print('state = $state');
});
}
@override
Widget build(BuildContext context) {
return MaterialApp(
home: Scaffold(
backgroundColor: mainBackgroundColor,
appBar: AppBar(
backgroundColor: mainBackgroundColor,
title: const Text(
'FRefresh',
style: TextStyle(color: mainTextTitleColor),
),
centerTitle: true,
),
body: Container(
width: double.infinity,
color: mainBackgroundColor,
child: SingleChildScrollView(
physics: BouncingScrollPhysics(),
child: Column(
crossAxisAlignment: CrossAxisAlignment.center,
children: [
buildTitle("Header Demo"),
buildMiddleMargin(),
/// Header Demo
headerDemo(),
buildMiddleMargin(),
buildTitle("HeaderBuilder Demo"),
buildMiddleMargin(),
/// HeaderBuilder Demo
buildHeaderBuilderDemo(),
buildMiddleMargin(),
buildTitle("Footer Demo"),
buildMiddleMargin(),
/// Load Demo
buildLoadDemo(),
buildMiddleMargin(),
buildTitle("FooterBuilder Demo"),
buildMiddleMargin(),
/// FooterBuilder Demo
footerBuilderDemo(),
buildMiddleMargin(),
buildTitle("Controller Demo"),
buildMiddleMargin(),
/// Controller Demo
buildControllerDemo(),
buildBiggestMargin(),
buildBiggestMargin(),
buildBiggestMargin(),
],
),
)),
),
);
}
Widget buildControllerDemo() {
return buildFRefreshContainer(StatefulBuilder(builder: (_, setState) {
return FRefresh(
controller: controller5,
header: Image.asset(
"assets/icon_refresh4.gif",
height: 80.0,
fit: BoxFit.fitHeight,
),
headerHeight: 80.0,
footer: Row(
mainAxisAlignment: MainAxisAlignment.center,
children: [
Image.asset(
"assets/icon_refresh5.gif",
height: 50.0,
),
Text(
"Writing..",
style: TextStyle(color: Color(0xffcfd8dc)),
),
],
),
footerHeight: 50,
onRefresh: () {
Timer(Duration(milliseconds: 3000), () {
controller5?.finishRefresh();
setState(() {
textColor = getColor();
});
});
},
onLoad: () {
Timer(Duration(milliseconds: 3000), () {
controller5?.finishLoad();
setState(() {
itemCount5 = itemCount5 + 10;
});
});
},
child: Container(
width: 220,
child: Column(
mainAxisSize: MainAxisSize.min,
crossAxisAlignment: CrossAxisAlignment.center,
children: [
FSuper(
width: 220.0,
height: 100.0,
backgroundColor: textColor,
corner: Corner(leftTopCorner: 6.0, rightTopCorner: 6.0),
shadowColor: mainShadowColor,
shadowBlur: 3.0,
shadowOffset: Offset(2.0, 2.0),
child1: FSuper(
width: 28.0,
height: 28.0,
text: "R",
textColor: Colors.white,
textAlignment: Alignment.center,
corner: Corner.all(20.0),
backgroundColor: Colors.black38,
shadowColor: mainShadowColor,
shadowBlur: 3.0,
shadowOffset: Offset(2.0, 2.0),
onClick: () {
controller5?.refresh(
duration: Duration(milliseconds: 2000));
},
),
child1Alignment: Alignment.topRight,
child1Margin: EdgeInsets.only(top: 12.0, right: 12.0),
),
const SizedBox(height: 18.0),
ListView.builder(
physics: NeverScrollableScrollPhysics(),
padding: EdgeInsets.only(left: 9.0, right: 9.0, bottom: 9.0),
shrinkWrap: true,
itemCount: itemCount5,
itemBuilder: (_, index) {
return FSuper(
width: 220.0 * (Random().nextDouble() * 0.5 + 0.5),
height: 5.0,
margin: EdgeInsets.only(top: index == 0 ? 0.0 : 12.0),
backgroundColor: textColor,
corner: Corner.all(2.0),
shadowColor: mainShadowColor,
shadowBlur: 5.0,
shadowOffset: Offset(2.0, 2.0),
);
})
],
),
),
);
}));
}
Color getColor() {
return colorList[Random().nextInt(colorList.length - 1)];
}
Widget footerBuilderDemo() {
return buildFRefreshContainer(StatefulBuilder(builder: (_, setState) {
return FRefresh(
controller: controller4,
footerBuilder: (setter) {
controller4.setOnStateChangedCallback((state) {
setter(() {
if (controller4.loadState == LoadState.PREPARING_LOAD) {
text4 = "Release to load";
} else if (controller4.loadState == LoadState.LOADING) {
text4 = "Loading..";
} else if (controller4.loadState == LoadState.FINISHING) {
text4 = "Loading completed";
} else {
text4 = "Drop-down to loading";
}
});
});
return Container(
height: 38,
alignment: Alignment.center,
child: Row(
mainAxisAlignment: MainAxisAlignment.center,
crossAxisAlignment: CrossAxisAlignment.center,
children: [
SizedBox(
width: 15,
height: 15,
child: CircularProgressIndicator(
backgroundColor: mainBackgroundColor,
valueColor:
new AlwaysStoppedAnimation<Color>(mainTextSubColor),
strokeWidth: 2.0,
),
),
const SizedBox(width: 9.0),
Text(
text4,
style: TextStyle(color: mainTextSubColor),
),
],
));
},
footerHeight: 38.0,
onLoad: () {
Timer(Duration(milliseconds: 3000), () {
itemCount4++;
controller4.backOriginOnLoadFinish = itemCount4 % 2 == 0;
controller4.finishLoad();
print('controller4.position = ${controller4.position}, controller4.scrollMetrics = ${controller4.scrollMetrics}');
setState(() {
});
});
},
child: Container(
width: 220,
child: Column(
mainAxisSize: MainAxisSize.min,
crossAxisAlignment: CrossAxisAlignment.center,
children: [
FSuper(
width: 220.0,
height: 100.0,
backgroundColor: mainBackgroundColor,
corner: Corner(leftTopCorner: 6.0, rightTopCorner: 6.0),
shadowColor: mainShadowColor,
shadowBlur: 3.0,
shadowOffset: Offset(2.0, 2.0),
),
const SizedBox(height: 15.0),
GridView.builder(
physics: NeverScrollableScrollPhysics(),
padding:
EdgeInsets.only(left: 12.0, right: 12.0, bottom: 9.0),
itemCount: 5,
shrinkWrap: true,
gridDelegate: SliverGridDelegateWithFixedCrossAxisCount(
crossAxisCount: 5,
crossAxisSpacing: 9.0,
mainAxisSpacing: 9.0,
),
itemBuilder: (_, index) {
return LayoutBuilder(builder: (_, constraints) {
return GridItem(
width: constraints.maxWidth,
height: constraints.maxHeight,
index: index,
);
});
}),
const SizedBox(height: 6.0),
FSuper(
width: 220.0 - 24.0,
height: 90.0,
backgroundColor: mainBackgroundColor,
corner: Corner.all(6.0),
shadowColor: mainShadowColor,
shadowBlur: 3.0,
shadowOffset: Offset(2.0, 2.0),
),
const SizedBox(height: 9.0),
GridView.builder(
physics: NeverScrollableScrollPhysics(),
padding:
EdgeInsets.only(left: 12.0, right: 12.0, bottom: 9.0),
itemCount: itemCount4,
shrinkWrap: true,
gridDelegate: SliverGridDelegateWithFixedCrossAxisCount(
crossAxisCount: 2,
crossAxisSpacing: 9.0,
mainAxisSpacing: 9.0,
),
itemBuilder: (_, index) {
return LayoutBuilder(builder: (_, constraints) {
return GridItem(
width: constraints.maxWidth,
height: constraints.maxHeight,
index: index,
onTap: (){
controller4?.scrollBy(20.0);
},
);
});
}),
],
),
),
);
}));
}
Widget buildLoadDemo() {
return buildFRefreshContainer(StatefulBuilder(builder: (_, setState) {
return FRefresh(
controller: controller3,
footer: Container(
height: 20,
alignment: Alignment.bottomCenter,
child: SizedBox(
width: double.infinity,
height: 10,
child: LinearProgressIndicator(),
)),
footerHeight: 20.0,
onLoad: () {
Timer(Duration(milliseconds: 3000), () {
controller3.finishLoad();
setState(() {
itemCount3++;
});
});
},
child: Container(
width: 220,
padding: EdgeInsets.only(top: 12),
child: Column(
mainAxisSize: MainAxisSize.min,
crossAxisAlignment: CrossAxisAlignment.center,
children: [
FSuper(
width: 220.0 - 24.0,
height: 100.0,
backgroundColor: mainBackgroundColor,
corner: Corner.all(6.0),
shadowColor: mainShadowColor,
shadowBlur: 3.0,
shadowOffset: Offset(2.0, 2.0),
),
const SizedBox(height: 15.0),
GridView.builder(
physics: NeverScrollableScrollPhysics(),
padding:
EdgeInsets.only(left: 12.0, right: 12.0, bottom: 9.0),
itemCount: 8,
shrinkWrap: true,
gridDelegate: SliverGridDelegateWithFixedCrossAxisCount(
crossAxisCount: 4,
crossAxisSpacing: 6.0,
mainAxisSpacing: 9.0,
),
itemBuilder: (_, index) {
return LayoutBuilder(builder: (_, constraints) {
return FFloat(
(settter) {
return Text(
"Hello, Developer!",
style: TextStyle(color: Colors.white),
);
},
anchor: GridItem(
width: constraints.maxWidth,
height: constraints.maxHeight,
index: index,
),
padding: EdgeInsets.all(6.0),
corner: FFloatCorner.all(3.0),
margin: EdgeInsets.only(bottom: 6.0),
);
});
}),
const SizedBox(height: 6.0),
FSuper(
width: 220.0 - 24.0,
height: 30.0,
backgroundColor: mainBackgroundColor,
corner: Corner.all(6.0),
shadowColor: mainShadowColor,
shadowBlur: 3.0,
shadowOffset: Offset(2.0, 2.0),
),
const SizedBox(height: 6.0),
ListView.builder(
physics: NeverScrollableScrollPhysics(),
padding:
EdgeInsets.only(left: 12.0, right: 12.0, bottom: 9.0),
shrinkWrap: true,
itemCount: itemCount3,
itemBuilder: (_, index) {
return ListItem(
width: 350.0 - 24.0,
height: 80.0,
index: index,
);
})
],
),
),
);
}));
}
Widget buildHeaderBuilderDemo() {
return buildFRefreshContainer(StatefulBuilder(builder: (_, setState) {
return FRefresh(
controller: controller2,
headerBuilder: (setter, constraints) {
return Container(
width: 220,
height: 100.0,
child: Stack(
children: [
Image.asset(
image2,
height: 100.0,
width: 220,
fit: BoxFit.fitWidth,
),
Positioned(
right: 12,
bottom: 10,
child: Row(
mainAxisSize: MainAxisSize.min,
crossAxisAlignment: CrossAxisAlignment.center,
mainAxisAlignment: MainAxisAlignment.start,
children: [
FRadio(
width: 20,
height: 10,
value: 1.0,
groupValue: groupValue,
normalColor: mainBackgroundColor,
selectedColor: mainTextNormalColor,
onChanged: (value) {
setter(() {
groupValue = value;
image2 = "assets/icon_refresh11.gif";
});
},
),
const SizedBox(width: 6.0),
FRadio(
width: 20,
height: 10,
value: 2.0,
groupValue: groupValue,
normalColor: mainBackgroundColor,
selectedColor: mainTextNormalColor,
onChanged: (value) {
setter(() {
groupValue = value;
image2 = "assets/icon_refresh9.gif";
});
},
),
const SizedBox(width: 6.0),
FRadio(
width: 20,
height: 10,
value: 3.0,
groupValue: groupValue,
normalColor: mainBackgroundColor,
selectedColor: mainTextNormalColor,
onChanged: (value) {
setter(() {
groupValue = value;
image2 = "assets/icon_refresh8.gif";
});
},
),
],
))
],
),
);
},
headerHeight: 100.0,
headerTrigger: 50,
child: GridView.builder(
physics: NeverScrollableScrollPhysics(),
padding:
EdgeInsets.only(top: 9.0, left: 12.0, right: 12.0, bottom: 9.0),
itemCount: itemCount2,
shrinkWrap: true,
gridDelegate: SliverGridDelegateWithFixedCrossAxisCount(
crossAxisCount: 2,
crossAxisSpacing: 9.0,
mainAxisSpacing: 9.0,
),
itemBuilder: (_, index) {
return LayoutBuilder(builder: (_, constraints) {
return GridItem(
width: constraints.maxWidth,
height: constraints.maxHeight,
index: index,
);
});
}),
onRefresh: () {
Timer(Duration(milliseconds: 5000), () {
controller2.finishRefresh();
setState(() {
itemCount2++;
});
});
},
);
}));
}
Widget headerDemo() {
return buildFRefreshContainer(StatefulBuilder(builder: (_, setState) {
return FRefresh(
controller: controller1,
header: Container(
width: 75.0,
height: 75.0,
clipBehavior: Clip.antiAlias,
decoration: BoxDecoration(),
child: OverflowBox(
maxHeight: 100.0,
maxWidth: 100.0,
child: Image.asset(
"assets/icon_refresh3.gif",
width: 100.0,
height: 100.0,
fit: BoxFit.fitHeight,
),
),
),
headerHeight: 75.0,
child: ListView.builder(
physics: NeverScrollableScrollPhysics(),
padding: EdgeInsets.only(left: 12.0, right: 12.0, bottom: 9.0),
shrinkWrap: true,
itemCount: itemCount1,
itemBuilder: (_, index) {
return InkWell(
onTap: () {
controller1.refresh(duration: Duration(milliseconds: 2000));
},
child: ListItem(
width: 350.0 - 24.0,
height: 80.0,
index: index,
),
);
}),
onRefresh: () {
Timer(Duration(milliseconds: 5000), () {
setState(() {
itemCount1++;
});
controller1.finishRefresh();
});
},
);
}));
}
Widget buildFRefreshContainer(Widget child) {
return Container(
height: 350.0,
width: 220.0,
decoration: BoxDecoration(
color: Colors.white,
borderRadius: BorderRadius.all(Radius.circular(6.0)),
boxShadow: [
BoxShadow(
color: mainShadowColor, blurRadius: 6.0, offset: Offset(3, 3)),
],
),
child: child,
);
}
}
class ListItem extends StatelessWidget {
final double width;
final double height;
final int index;
ListItem({
this.width = double.infinity,
this.height = 100,
this.index,
});
@override
Widget build(BuildContext context) {
double wR = width / 326.0;
double hR = height / 80.0;
return Container(
width: width,
height: height,
margin: EdgeInsets.only(top: 12.0 * hR),
padding: EdgeInsets.all(6.0 * hR),
decoration: BoxDecoration(
color: Colors.white,
borderRadius: BorderRadius.all(Radius.circular(3.0 * hR)),
boxShadow: [
BoxShadow(
color: mainShadowColor,
blurRadius: 3.0,
offset: Offset(2.0, 2.0)),
],
),
child: Column(
crossAxisAlignment: CrossAxisAlignment.start,
mainAxisSize: MainAxisSize.min,
children: [
Row(
crossAxisAlignment: CrossAxisAlignment.center,
children: [
FSuper(
backgroundColor: mainBackgroundColor,
width: 30.0 * hR,
height: 30.0 * hR,
corner: Corner.all(30.0 * hR / 2.0),
),
SizedBox(width: 9.0 * wR),
Column(
crossAxisAlignment: CrossAxisAlignment.start,
children: [
FSuper(
backgroundColor: mainBackgroundColor,
width: 50.0 * wR,
height: 5.0 * hR,
corner: Corner.all(10.0 * hR / 2.0),
),
SizedBox(height: 6.0 * hR),
FSuper(
backgroundColor: mainBackgroundColor,
width: 38.0 * wR,
height: 5.0 * hR,
corner: Corner.all(10.0 * hR / 2.0),
),
],
),
],
),
SizedBox(height: 10.0 * hR),
FSuper(
margin: EdgeInsets.only(left: 2.0),
backgroundColor: mainBackgroundColor,
width: width / 2.8,
height: 5.0 * hR,
corner: Corner.all(10.0 * hR / 2.0),
),
SizedBox(height: 6.0 * hR),
FSuper(
margin: EdgeInsets.only(left: 2.0),
backgroundColor: mainBackgroundColor,
width: width / 2.0,
height: 5.0 * hR,
corner: Corner.all(10.0 * hR / 2.0),
),
SizedBox(height: 6.0 * hR),
FSuper(
margin: EdgeInsets.only(left: 2.0),
backgroundColor: mainBackgroundColor,
width: width / 2.0,
height: 5.0 * hR,
corner: Corner.all(10.0 * hR / 2.0),
),
],
),
);
}
}
class GridItem extends StatelessWidget {
final double width;
final double height;
final int index;
final VoidCallback onTap;
GridItem({
this.width = 100,
this.height = 100,
this.index,
this.onTap,
});
@override
Widget build(BuildContext context) {
double wR = width / 93.5;
double hR = height / 93.5;
return FSuper(
width: width,
height: height,
backgroundColor: Colors.white,
corner: Corner.all(6.0 * wR),
shadowColor: mainShadowColor,
shadowBlur: 3.0,
shadowOffset: Offset(2.0, 2.0),
onClick: onTap,
child1: FSuper(
width: width,
height: 36.0 * hR,
backgroundColor: Colors.grey.withOpacity(0.1),
corner: Corner(leftBottomCorner: 6.0 * wR, rightBottomCorner: 6.0 * wR),
child1: Column(
crossAxisAlignment: CrossAxisAlignment.start,
mainAxisSize: MainAxisSize.min,
children: [
FSuper(
width: width / 2.0,
height: 5.0 * hR,
backgroundColor: Colors.white,
corner: Corner.all(5.0 * hR),
),
SizedBox(height: 6.0 * hR),
FSuper(
width: width / 1.3,
height: 5.0 * hR,
backgroundColor: Colors.white,
corner: Corner.all(5.0 * hR),
),
],
),
child1Alignment: Alignment.centerLeft,
child1Margin: EdgeInsets.only(left: 9.0 * wR),
),
child1Alignment: Alignment.bottomCenter,
);
}
}Metadata
119
likes
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pub points
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popularity
Publisher
unverified uploader
Metadata
Help you to build pull-down refresh and pull-up loading in the simplest way.
Repository (GitHub)
View/report issues
License
unknown (license)
