| 1 | import 'dart:math' as math; |
| 2 | import 'dart:ui'; |
| 3 | import 'package:cake_wallet/entities/page_indicator_actions.dart'; |
| 4 | import 'package:flutter/material.dart'; |
| 5 | import 'package:flutter_svg/flutter_svg.dart'; |
| 6 | import 'package:cake_wallet/view_model/dashboard/dashboard_view_model.dart'; |
| 7 | |
| 8 | class PageIndicator extends StatefulWidget { |
| 9 | const PageIndicator({ |
| 10 | super.key, |
| 11 | required this.controller, |
| 12 | required this.dashboardViewModel, |
| 13 | }); |
| 14 | |
| 15 | final PageController controller; |
| 16 | final DashboardViewModel dashboardViewModel; |
| 17 | |
| 18 | @override |
| 19 | State<PageIndicator> createState() => _PageIndicatorState(); |
| 20 | } |
| 21 | |
| 22 | class _PageIndicatorState extends State<PageIndicator> { |
| 23 | static const barHeight = 37.0; |
| 24 | static const iconWidth = 16.0; |
| 25 | static const iconHeight = 16.0; |
| 26 | static const iconSpacing = 5.0; |
| 27 | static const barHorizontalPadding = 4.0; |
| 28 | static const pillHorizontalPadding = 8.0; |
| 29 | static const edgePadding = 5.0; |
| 30 | static const barBorderRadius = 50.0; |
| 31 | static const pillBorderRadius = 50.0; |
| 32 | static const pageSwitchDuration = Duration(milliseconds: 300); |
| 33 | static const pillMoveDuration = Duration(milliseconds: 300); |
| 34 | static const pillResizeDuration = Duration(milliseconds: 200); |
| 35 | static const textStyle = TextStyle( |
| 36 | fontSize: 12, |
| 37 | fontWeight: FontWeight.w400, |
| 38 | ); |
| 39 | |
| 40 | late int selectedIndex; |
| 41 | late final VoidCallback _pageListener; |
| 42 | |
| 43 | @override |
| 44 | void initState() { |
| 45 | super.initState(); |
| 46 | |
| 47 | selectedIndex = widget.controller.initialPage; |
| 48 | |
| 49 | _pageListener = () { |
| 50 | final page = widget.controller.page; |
| 51 | if (page == null) return; |
| 52 | |
| 53 | final rounded = page.round(); |
| 54 | if (rounded != selectedIndex && mounted) { |
| 55 | setState(() { |
| 56 | selectedIndex = rounded; |
| 57 | }); |
| 58 | } |
| 59 | }; |
| 60 | |
| 61 | widget.controller.addListener(_pageListener); |
| 62 | } |
| 63 | |
| 64 | @override |
| 65 | void dispose() { |
| 66 | widget.controller.removeListener(_pageListener); |
| 67 | super.dispose(); |
| 68 | } |
| 69 | |
| 70 | void _onItemTap(int index) { |
| 71 | if (index == selectedIndex) return; |
| 72 | widget.controller.animateToPage( |
| 73 | index, |
| 74 | duration: pageSwitchDuration, |
| 75 | curve: Curves.easeOutCubic, |
| 76 | ); |
| 77 | } |
| 78 | |
| 79 | double _estimateItemWidthForAction(BuildContext context, PageIndicatorActions action, |
| 80 | {Color? color}) { |
| 81 | final text = action.name(context); |
| 82 | final textPainter = TextPainter( |
| 83 | text: TextSpan(text: text, style: textStyle.copyWith(color: color)), |
| 84 | maxLines: 1, |
| 85 | textDirection: Directionality.of(context), |
| 86 | textScaler: MediaQuery.of(context).textScaler, |
| 87 | )..layout(); |
| 88 | return iconWidth + iconSpacing + textPainter.width + pillHorizontalPadding * 2; |
| 89 | } |
| 90 | |
| 91 | @override |
| 92 | Widget build(BuildContext context) { |
| 93 | final visibleActions = PageIndicatorActions.all.where((action) { |
| 94 | return action.isEnabled?.call(widget.dashboardViewModel) ?? true; |
| 95 | }).toList(); |
| 96 | |
| 97 | // Don't show indicator if less than 2 actions |
| 98 | if (visibleActions.length < 2) return const SizedBox.shrink(); |
| 99 | |
| 100 | selectedIndex = selectedIndex.clamp(0, visibleActions.length - 1); |
| 101 | |
| 102 | // Theme setup |
| 103 | final theme = Theme.of(context); |
| 104 | final backgroundColor = theme.colorScheme.surfaceContainer.withAlpha(122); |
| 105 | final pillColor = theme.colorScheme.onSurface.withAlpha(30); |
| 106 | final activeColor = theme.colorScheme.onSurface; |
| 107 | final inactiveColor = theme.colorScheme.primary; |
| 108 | |
| 109 | // Size calculations |
| 110 | final screenWidth = MediaQuery.of(context).size.width; |
| 111 | final isRTL = Directionality.of(context) == TextDirection.rtl; |
| 112 | |
| 113 | final pillWidth = _estimateItemWidthForAction( |
| 114 | context, |
| 115 | visibleActions[selectedIndex], |
| 116 | color: activeColor, |
| 117 | ); |
| 118 | |
| 119 | final actionWidths = [ |
| 120 | for (final action in visibleActions) |
| 121 | _estimateItemWidthForAction(context, action, color: inactiveColor) |
| 122 | ]; |
| 123 | |
| 124 | final totalItemsWidth = |
| 125 | actionWidths.fold(0.0, (sum, width) => sum + width) + barHorizontalPadding * 2; |
| 126 | |
| 127 | final barWidth = math.min(totalItemsWidth, screenWidth * 0.95); |
| 128 | |
| 129 | final count = visibleActions.length; |
| 130 | final firstLeft = edgePadding; |
| 131 | final secondLeft = barWidth - (isRTL ? actionWidths.first : actionWidths[1]) - edgePadding; |
| 132 | |
| 133 | final List<double> positions; |
| 134 | |
| 135 | if (count == 2) { |
| 136 | positions = [firstLeft, secondLeft]; |
| 137 | } else { |
| 138 | final lastLeft = barWidth - (isRTL ? actionWidths.first : actionWidths.last) - edgePadding; |
| 139 | |
| 140 | final centerLeft = |
| 141 | (isRTL ? actionWidths.last + edgePadding : actionWidths.first + edgePadding); |
| 142 | |
| 143 | positions = [firstLeft, centerLeft, lastLeft]; |
| 144 | } |
| 145 | |
| 146 | final left = (isRTL ? positions.reversed.toList() : positions)[selectedIndex]; |
| 147 | final currentAction = visibleActions[selectedIndex]; |
| 148 | |
| 149 | return Align( |
| 150 | alignment: Alignment.bottomCenter, |
| 151 | child: Padding( |
| 152 | padding: EdgeInsets.only(top: 10), |
| 153 | child: Container( |
| 154 | width: barWidth, |
| 155 | child: ClipRRect( |
| 156 | borderRadius: BorderRadius.circular(barBorderRadius), |
| 157 | child: BackdropFilter( |
| 158 | filter: ImageFilter.blur(sigmaX: 30, sigmaY: 30), |
| 159 | child: Container( |
| 160 | height: barHeight, |
| 161 | decoration: BoxDecoration( |
| 162 | color: backgroundColor, |
| 163 | borderRadius: BorderRadius.circular(barBorderRadius), |
| 164 | ), |
| 165 | child: Stack( |
| 166 | alignment: Alignment.center, |
| 167 | children: [ |
| 168 | AnimatedPill( |
| 169 | left: left, |
| 170 | pillColor: pillColor, |
| 171 | currentAction: currentAction, |
| 172 | pillIconHeight: iconHeight, |
| 173 | pillIconWidth: iconWidth, |
| 174 | pillIconSpacing: iconSpacing, |
| 175 | pillBorderRadius: pillBorderRadius, |
| 176 | contentColor: activeColor, |
| 177 | estimateWidthForAction: pillWidth, |
| 178 | pillTextStyle: textStyle, |
| 179 | pillMoveDuration: pillMoveDuration, |
| 180 | pillResizeDuration: pillResizeDuration, |
| 181 | ), |
| 182 | Padding( |
| 183 | padding: const EdgeInsets.symmetric(horizontal: barHorizontalPadding), |
| 184 | child: Row( |
| 185 | mainAxisAlignment: MainAxisAlignment.spaceBetween, |
| 186 | children: [ |
| 187 | for (int i = 0; i < visibleActions.length; i++) |
| 188 | Semantics( |
| 189 | button: true, |
| 190 | label: visibleActions[i].name(context), |
| 191 | value: i == selectedIndex ? 'Selected' : null, |
| 192 | hint: 'Double tap to open ${visibleActions[i].name(context)} page', |
| 193 | onTap: () => _onItemTap(i), |
| 194 | child: GestureDetector( |
| 195 | behavior: HitTestBehavior.translucent, |
| 196 | onTap: () => _onItemTap(i), |
| 197 | child: Container( |
| 198 | height: barHeight, |
| 199 | width: i == selectedIndex |
| 200 | ? pillWidth |
| 201 | : _estimateItemWidthForAction(context, visibleActions[i]), |
| 202 | alignment: Alignment.center, |
| 203 | child: Row( |
| 204 | mainAxisSize: MainAxisSize.min, |
| 205 | children: [ |
| 206 | TweenAnimationBuilder<Color?>( |
| 207 | duration: const Duration(milliseconds: 300), |
| 208 | curve: Curves.easeOutCubic, |
| 209 | tween: ColorTween( |
| 210 | begin: inactiveColor, |
| 211 | end: i == selectedIndex ? activeColor : inactiveColor, |
| 212 | ), |
| 213 | builder: (context, color, _) => SvgPicture.asset( |
| 214 | visibleActions[i].image, |
| 215 | width: iconWidth, |
| 216 | height: iconHeight, |
| 217 | colorFilter: ColorFilter.mode(color!, BlendMode.srcIn), |
| 218 | ), |
| 219 | ), |
| 220 | SizedBox(width: iconSpacing), |
| 221 | TweenAnimationBuilder<Color?>( |
| 222 | duration: const Duration(milliseconds: 300), |
| 223 | curve: Curves.easeOutCubic, |
| 224 | tween: ColorTween( |
| 225 | begin: inactiveColor, |
| 226 | end: i == selectedIndex ? activeColor : inactiveColor, |
| 227 | ), |
| 228 | builder: (context, color, _) => Text( |
| 229 | visibleActions[i].name(context), |
| 230 | style: textStyle.copyWith(color: color), |
| 231 | overflow: TextOverflow.fade, |
| 232 | softWrap: false, |
| 233 | ), |
| 234 | ), |
| 235 | ], |
| 236 | ), |
| 237 | ), |
| 238 | ), |
| 239 | ), |
| 240 | ], |
| 241 | ), |
| 242 | ) |
| 243 | ], |
| 244 | )), |
| 245 | ), |
| 246 | ), |
| 247 | ), |
| 248 | ), |
| 249 | ); |
| 250 | } |
| 251 | } |
| 252 | |
| 253 | class AnimatedPill extends StatelessWidget { |
| 254 | const AnimatedPill({ |
| 255 | super.key, |
| 256 | required this.left, |
| 257 | required this.pillColor, |
| 258 | required this.contentColor, |
| 259 | required this.pillIconHeight, |
| 260 | required this.pillIconWidth, |
| 261 | required this.pillBorderRadius, |
| 262 | required this.currentAction, |
| 263 | required this.estimateWidthForAction, |
| 264 | required this.pillIconSpacing, |
| 265 | required this.pillTextStyle, |
| 266 | required this.pillMoveDuration, |
| 267 | required this.pillResizeDuration, |
| 268 | }); |
| 269 | |
| 270 | final double left; |
| 271 | final Color pillColor; |
| 272 | final Color contentColor; |
| 273 | final double pillIconHeight; |
| 274 | final double pillIconWidth; |
| 275 | final double pillBorderRadius; |
| 276 | final PageIndicatorActions currentAction; |
| 277 | final double estimateWidthForAction; |
| 278 | final double pillIconSpacing; |
| 279 | final TextStyle pillTextStyle; |
| 280 | final Duration pillMoveDuration; |
| 281 | final Duration pillResizeDuration; |
| 282 | |
| 283 | @override |
| 284 | Widget build(BuildContext context) { |
| 285 | return AnimatedPositioned( |
| 286 | duration: pillMoveDuration, |
| 287 | curve: Curves.easeOutCubic, |
| 288 | left: left, |
| 289 | top: 4, |
| 290 | bottom: 4, |
| 291 | child: AnimatedContainer( |
| 292 | duration: pillResizeDuration, |
| 293 | curve: Curves.easeOutCubic, |
| 294 | width: estimateWidthForAction, |
| 295 | decoration: |
| 296 | BoxDecoration(color: pillColor, borderRadius: BorderRadius.circular(pillBorderRadius)), |
| 297 | clipBehavior: Clip.hardEdge, |
| 298 | alignment: Alignment.center, |
| 299 | ), |
| 300 | ); |
| 301 | } |
| 302 | } |