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import 'package:flutter/material.dart';
import 'package:flutter/foundation.dart';
import 'package:flutter_swiper/flutter_swiper.dart';
import 'package:flutter_page_indicator/flutter_page_indicator.dart';
class FractionPaginationBuilder extends SwiperPlugin {
///color ,if set null , will be Theme.of(context).scaffoldBackgroundColor
final Color? color;
///color when active,if set null , will be Theme.of(context).primaryColor
final Color? activeColor;
////font size
final double fontSize;
///font size when active
final double activeFontSize;
final Key? key;
const FractionPaginationBuilder(
{this.color,
this.fontSize: 20.0,
this.key,
this.activeColor,
this.activeFontSize: 35.0});
@override
Widget build(BuildContext context, SwiperPluginConfig? config) {
ThemeData themeData = Theme.of(context);
Color activeColor = this.activeColor ?? themeData.primaryColor;
Color color = this.color ?? themeData.scaffoldBackgroundColor;
if (Axis.vertical == config!.scrollDirection) {
return new Column(
key: key,
mainAxisSize: MainAxisSize.min,
children: <Widget>[
new Text(
"${config.activeIndex! + 1}",
style: TextStyle(color: activeColor, fontSize: activeFontSize),
),
new Text(
"/",
style: TextStyle(color: color, fontSize: fontSize),
),
new Text(
"${config.itemCount}",
style: TextStyle(color: color, fontSize: fontSize),
)
],
);
} else {
return new Row(
key: key,
mainAxisSize: MainAxisSize.min,
children: <Widget>[
new Text(
"${config.activeIndex! + 1}",
style: TextStyle(color: activeColor, fontSize: activeFontSize),
),
new Text(
" / ${config.itemCount}",
style: TextStyle(color: color, fontSize: fontSize),
)
],
);
}
}
}
class RectSwiperPaginationBuilder extends SwiperPlugin {
///color when current index,if set null , will be Theme.of(context).primaryColor
final Color? activeColor;
///,if set null , will be Theme.of(context).scaffoldBackgroundColor
final Color? color;
///Size of the rect when activate
final Size activeSize;
///Size of the rect
final Size size;
/// Space between rects
final double space;
final Key? key;
const RectSwiperPaginationBuilder(
{this.activeColor,
this.color,
this.key,
this.size: const Size(10.0, 2.0),
this.activeSize: const Size(10.0, 2.0),
this.space: 3.0});
@override
Widget build(BuildContext context, SwiperPluginConfig? config) {
ThemeData themeData = Theme.of(context);
Color activeColor = this.activeColor ?? themeData.primaryColor;
Color color = this.color ?? themeData.scaffoldBackgroundColor;
List<Widget> list = [];
if (config!.itemCount! > 20) {
print(
"The itemCount is too big, we suggest use FractionPaginationBuilder instead of DotSwiperPaginationBuilder in this sitituation");
}
int itemCount = config.itemCount!;
int? activeIndex = config.activeIndex;
for (int i = 0; i < itemCount; ++i) {
bool active = i == activeIndex;
Size size = active ? this.activeSize : this.size;
list.add(SizedBox(
width: size.width,
height: size.height,
child: Container(
color: active ? activeColor : color,
key: Key("pagination_$i"),
margin: EdgeInsets.all(space),
),
));
}
if (config.scrollDirection == Axis.vertical) {
return new Column(
key: key,
mainAxisSize: MainAxisSize.min,
children: list,
);
} else {
return new Row(
key: key,
mainAxisSize: MainAxisSize.min,
children: list,
);
}
}
}
class DotSwiperPaginationBuilder extends SwiperPlugin {
///color when current index,if set null , will be Theme.of(context).primaryColor
final Color? activeColor;
///,if set null , will be Theme.of(context).scaffoldBackgroundColor
final Color? color;
///Size of the dot when activate
final double activeSize;
///Size of the dot
final double size;
/// Space between dots
final double space;
final Key? key;
const DotSwiperPaginationBuilder(
{this.activeColor,
this.color,
this.key,
this.size: 10.0,
this.activeSize: 10.0,
this.space: 3.0});
@override
Widget build(BuildContext context, SwiperPluginConfig? config) {
if (config!.itemCount! > 20) {
print(
"The itemCount is too big, we suggest use FractionPaginationBuilder instead of DotSwiperPaginationBuilder in this sitituation");
}
Color? activeColor = this.activeColor;
Color? color = this.color;
if (activeColor == null || color == null) {
ThemeData themeData = Theme.of(context);
activeColor = this.activeColor ?? themeData.primaryColor;
color = this.color ?? themeData.scaffoldBackgroundColor;
}
if (config.indicatorLayout != PageIndicatorLayout.NONE &&
config.layout == SwiperLayout.DEFAULT) {
return new PageIndicator(
count: config.itemCount!,
controller: config.pageController!,
layout: config.indicatorLayout!,
size: size,
activeColor: activeColor,
color: color,
space: space,
);
}
List<Widget> list = [];
int itemCount = config.itemCount!;
int? activeIndex = config.activeIndex;
for (int i = 0; i < itemCount; ++i) {
bool active = i == activeIndex;
list.add(Container(
key: Key("pagination_$i"),
margin: EdgeInsets.all(space),
child: ClipOval(
child: Container(
color: active ? activeColor : color,
width: active ? activeSize : size,
height: active ? activeSize : size,
),
),
));
}
if (config.scrollDirection == Axis.vertical) {
return new Column(
key: key,
mainAxisSize: MainAxisSize.min,
children: list,
);
} else {
return new Row(
key: key,
mainAxisSize: MainAxisSize.min,
children: list,
);
}
}
}
typedef Widget SwiperPaginationBuilder(
BuildContext context, SwiperPluginConfig? config);
class SwiperCustomPagination extends SwiperPlugin {
final SwiperPaginationBuilder builder;
SwiperCustomPagination({required this.builder});
@override
Widget build(BuildContext context, SwiperPluginConfig? config) {
return builder(context, config);
}
}
class SwiperPagination extends SwiperPlugin {
/// dot style pagination
static const SwiperPlugin dots = const DotSwiperPaginationBuilder();
/// fraction style pagination
static const SwiperPlugin fraction = const FractionPaginationBuilder();
static const SwiperPlugin rect = const RectSwiperPaginationBuilder();
/// Alignment.bottomCenter by default when scrollDirection== Axis.horizontal
/// Alignment.centerRight by default when scrollDirection== Axis.vertical
final Alignment? alignment;
/// Distance between pagination and the container
final EdgeInsetsGeometry margin;
/// Build the widet
final SwiperPlugin builder;
final Key? key;
const SwiperPagination(
{this.alignment,
this.key,
this.margin: const EdgeInsets.all(10.0),
this.builder: SwiperPagination.dots});
Widget build(BuildContext context, SwiperPluginConfig? config) {
Alignment alignment = this.alignment ??
(config!.scrollDirection == Axis.horizontal
? Alignment.bottomCenter
: Alignment.centerRight);
Widget child = Container(
margin: margin,
child: this.builder.build(context, config),
);
if (!config!.outer!) {
child = new Align(
key: key,
alignment: alignment,
child: child,
);
}
return child;
}
}