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Custom decoration #1

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d4d271d
multiple-stretch-areas initial commit
Oct 30, 2025
fb9a55c
custom-decoration initial commit
Nov 3, 2025
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Binary file added example/images/multi.webp
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2 changes: 1 addition & 1 deletion example/lib/basic.dart
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Original file line number Diff line number Diff line change
Expand Up @@ -43,7 +43,7 @@ class Basic extends StatelessWidget {
foregroundColor: WidgetStatePropertyAll(Colors.black),
),
onPressed: () {
invalidateNinePatchCacheItem(const AssetImage('images/flag.9.webp'));
NinePatchCache.of(context)?.invalidateNinePatchCacheItem(const AssetImage('images/flag.9.webp'));
},
child: const Text('NinePatch with "centerSlice" and "padding" embedded in image'),
),
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81 changes: 47 additions & 34 deletions example/lib/main.dart
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Original file line number Diff line number Diff line change
@@ -1,46 +1,59 @@
import 'dart:ui';

import 'package:flutter/material.dart';
import 'package:nine_patch/nine_patch.dart';

import 'animation.dart';
import 'basic.dart';
import 'multi.dart';
import 'shadows.dart';

main() {
runApp(MaterialApp(
scrollBehavior: const MaterialScrollBehavior().copyWith(dragDevices: {PointerDeviceKind.mouse, PointerDeviceKind.touch}),
home: Scaffold(
body: Builder(
builder: (context) {
return ListView(
children: [
ListTile(
title: const Text('basic usage'),
subtitle: const Text('Basic()'),
onTap: () {
final route = MaterialPageRoute(builder: (ctx) => Basic());
Navigator.of(context).push(route);
},
),
ListTile(
title: const Text('text field shadows'),
subtitle: const Text('EditableTextShadows()'),
onTap: () {
final route = MaterialPageRoute(builder: (ctx) => EditableTextShadows());
Navigator.of(context).push(route);
},
),
ListTile(
title: const Text('animated stuff'),
subtitle: const Text('Animated()'),
onTap: () {
final route = MaterialPageRoute(builder: (ctx) => Animated());
Navigator.of(context).push(route);
},
),
],
);
}
runApp(NinePatchCache(
maximumSize: 10,
child: MaterialApp(
scrollBehavior: const MaterialScrollBehavior().copyWith(dragDevices: {PointerDeviceKind.mouse, PointerDeviceKind.touch}),
home: Scaffold(
body: Builder(
builder: (context) {
return ListView(
children: [
ListTile(
title: const Text('basic usage'),
subtitle: const Text('Basic()'),
onTap: () {
final route = MaterialPageRoute(builder: (ctx) => Basic());
Navigator.of(context).push(route);
},
),
ListTile(
title: const Text('multiple stretch lines'),
subtitle: const Text('Multi()'),
onTap: () {
final route = MaterialPageRoute(builder: (ctx) => Multi());
Navigator.of(context).push(route);
},
),
ListTile(
title: const Text('text field shadows'),
subtitle: const Text('EditableTextShadows()'),
onTap: () {
final route = MaterialPageRoute(builder: (ctx) => EditableTextShadows());
Navigator.of(context).push(route);
},
),
ListTile(
title: const Text('animated stuff'),
subtitle: const Text('Animated()'),
onTap: () {
final route = MaterialPageRoute(builder: (ctx) => Animated());
Navigator.of(context).push(route);
},
),
],
);
}
),
),
),
));
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65 changes: 65 additions & 0 deletions example/lib/multi.dart
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Original file line number Diff line number Diff line change
@@ -0,0 +1,65 @@
// ignore_for_file: use_key_in_widget_constructors

import 'package:flutter/material.dart';

import 'package:nine_patch/nine_patch.dart';

class Multi extends StatelessWidget {
@override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(),
body: SingleChildScrollView(
child: Center(
child: Column(
children: [
ConstrainedBox(
constraints: const BoxConstraints(maxWidth: 200),
child: const NinePatch(
imageProvider: AssetImage('images/multi.webp'),
child: Center(
child: Text('this background is a single webp image that contains two horizontal stretch areas'),
),
),
),
ConstrainedBox(
constraints: const BoxConstraints(maxWidth: 128),
child: NinePatch(
colorFilter: ColorFilter.mode(Colors.lightGreenAccent.shade400, BlendMode.modulate),
imageProvider: const AssetImage('images/multi.webp'),
child: const Center(
child: Text('Incididunt aliquip elit non laboris aliquip do irure non non sint reprehenderit et exercitation elit.'),
),
),
),
ConstrainedBox(
constraints: const BoxConstraints(maxWidth: 225),
child: Container(
decoration: NinePatchDecoration(
image: const NinePatchDecorationImage(
image: AssetImage('images/multi.webp')
),
context: context,
padding: const EdgeInsets.only(top: 8) + const EdgeInsets.all(10),
),
child: const Center(
child: Text.rich(TextSpan(
children: [
TextSpan(text: 'this is a simple '),
TextSpan(text: 'Container ', style: TextStyle(fontWeight: FontWeight.bold)),
TextSpan(text: 'using '),
TextSpan(text: 'NinePatchDecoration', style: TextStyle(fontWeight: FontWeight.bold)),
TextSpan(text: ', note that you have to provide the content padding since it cannot be synchronously read from the '),
TextSpan(text: 'ImageProvider', style: TextStyle(fontWeight: FontWeight.bold)),
],
)),
),
),
),
],
),
),
),
);
}
}
86 changes: 45 additions & 41 deletions example/lib/shadows.dart
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Original file line number Diff line number Diff line change
Expand Up @@ -28,54 +28,58 @@ class _EditableTextShadowsState extends State<EditableTextShadows> {
Widget build(BuildContext context) {
final textTheme = Theme.of(context).textTheme;
return Scaffold(
backgroundColor: Colors.green.shade200,
appBar: AppBar(),
body: Column(
children: [
const Card(
child: Padding(
padding: EdgeInsets.all(4),
child: Text('click any text field (or one of "focus traversal" buttons)', ),
),
),
Row(
children: [
const Padding(
padding: EdgeInsets.only(left: 8),
child: Text('move focus:'),
body: DecoratedBox(
decoration: BoxDecoration(
gradient: LinearGradient(colors: [Colors.indigo.shade100, Colors.teal.shade200]),
),
child: Column(
children: [
const Card(
child: Padding(
padding: EdgeInsets.all(4),
child: Text('click any text field (or one of "focus traversal" buttons)', ),
),
IconButton(onPressed: () => _moveFocus(-1, 0), icon: const Icon(Icons.arrow_back)),
IconButton(onPressed: () => _moveFocus(1, -1), icon: const Icon(Icons.arrow_forward)),
],
),
const Divider(),
for (final (controller, focusNode) in editableTextData)
Padding(
padding: const EdgeInsets.only(top: 6, left: 6, right: 6),
child: AnimatedContainer(
duration: const Duration(milliseconds: 300),
color: focusNode.hasFocus? Colors.grey.shade200 : Colors.white,
child: AnimatedMultiNinePatch(
imageProvider: const AssetImage('images/shadows.webp'),
frameBuilder: horizontalFixedSizeFrameBuilder(6, const Size(18, 13)),
phase: focusNode.hasFocus? 0 : 1,
),
Row(
children: [
const Padding(
padding: EdgeInsets.only(left: 8),
child: Text('move focus:'),
),
IconButton(onPressed: () => _moveFocus(-1, 0), icon: const Icon(Icons.arrow_back)),
IconButton(onPressed: () => _moveFocus(1, -1), icon: const Icon(Icons.arrow_forward)),
],
),
const Divider(),
for (final (controller, focusNode) in editableTextData)
Padding(
padding: const EdgeInsets.only(top: 6, left: 6, right: 6),
child: AnimatedContainer(
duration: const Duration(milliseconds: 300),
debugLabel: 'shadows',
child: Padding(
padding: const EdgeInsets.symmetric(horizontal: 4),
child: EditableText(
controller: controller,
focusNode: focusNode,
style: textTheme.headlineSmall!,
cursorColor: Colors.black54,
backgroundCursorColor: Colors.white,
color: focusNode.hasFocus? Colors.grey.shade200 : Colors.white,
child: AnimatedMultiNinePatch(
imageProvider: const AssetImage('images/shadows.webp'),
frameBuilder: horizontalFixedSizeFrameBuilder(6, const Size(18, 13)),
phase: focusNode.hasFocus? 0 : 1,
duration: const Duration(milliseconds: 300),
debugLabel: 'shadows',
child: Padding(
padding: const EdgeInsets.symmetric(horizontal: 4),
child: EditableText(
controller: controller,
focusNode: focusNode,
style: textTheme.headlineSmall!,
cursorColor: Colors.black54,
backgroundCursorColor: Colors.white,
),
),
),
),
),
),
const SizedBox(height: 6),
],
const SizedBox(height: 6),
],
),
),
);
}
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1 change: 1 addition & 0 deletions example/pubspec.yaml
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Expand Up @@ -70,6 +70,7 @@ flutter:
- images/flag1.9.webp
- images/btn_default_normal.9.webp
- images/shadows.webp
- images/multi.webp


# An image asset can refer to one or more resolution-specific "variants", see
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9 changes: 4 additions & 5 deletions lib/nine_patch.dart
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Expand Up @@ -2,13 +2,12 @@ export 'src/nine_patch.dart' show
NinePatch,
AnimatedNinePatch,
AnimatedMultiNinePatch,
ninePatchCacheSize,
NinePatchDecoration,
NinePatchDecorationImage,
horizontalFixedSizeFrameBuilder,
verticalFixedSizeFrameBuilder,
gridFixedSizeFrameBuilder,
invalidateNinePatchCache,
invalidateNinePatchCacheItem,
invalidateNinePatchCacheWhere,
NinePatchBuilder,
FrameBuilder,
NinePatchAnimatedBuilder;
NinePatchAnimatedBuilder,
NinePatchCache;
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