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| 1 | +import 'package:flutter/material.dart'; |
| 2 | + |
| 3 | +import '_src.g.dart'; |
| 4 | +import 'package:df_type/df_type.dart' show letAsOrNull; |
| 5 | + |
| 6 | +/// A widget that adapts its layout based on screen size and orientation using AppLayout. |
| 7 | +/// Supports WIDE, NARROW, MOBILE_HORIZONTAL, and MOBILE layouts, compatible with AdaptiveScreenStateInterface. |
| 8 | +class AdaptiveLayoutBuilder extends StatelessWidget { |
| 9 | + /// Builder for the main content body |
| 10 | + final Widget Function(BuildContext) bodyBuilder; |
| 11 | + |
| 12 | + /// Optional builders for specific layouts |
| 13 | + final Widget Function(BuildContext, Widget)? mobileLayoutBuilder; |
| 14 | + final Widget Function(BuildContext, Widget)? horizontalMobileLayoutBuilder; |
| 15 | + final Widget Function(BuildContext, Widget)? narrowLayoutBuilder; |
| 16 | + final Widget Function(BuildContext, Widget)? wideLayoutBuilder; |
| 17 | + |
| 18 | + /// Optional builders for specific body content |
| 19 | + final Widget Function(BuildContext)? mobileBodyBuilder; |
| 20 | + final Widget Function(BuildContext)? horizontalMobileBodyBuilder; |
| 21 | + final Widget Function(BuildContext)? narrowBodyBuilder; |
| 22 | + final Widget Function(BuildContext)? wideBodyBuilder; |
| 23 | + |
| 24 | + /// Optional side widgets |
| 25 | + final Widget Function(BuildContext, double)? topSideBuilder; |
| 26 | + final Widget Function(BuildContext, double)? bottomSideBuilder; |
| 27 | + final Widget Function(BuildContext, double)? leftSideBuilder; |
| 28 | + final Widget Function(BuildContext, double)? rightSideBuilder; |
| 29 | + |
| 30 | + /// Optional background and foreground |
| 31 | + final Widget Function(BuildContext)? backgroundBuilder; |
| 32 | + final Widget Function(BuildContext)? foregroundBuilder; |
| 33 | + |
| 34 | + /// Padding for the body |
| 35 | + final Widget Function(BuildContext, Widget)? paddingBuilder; |
| 36 | + |
| 37 | + /// Alignment for the body with side insets |
| 38 | + final Widget Function(BuildContext, Widget, EdgeInsets)? alignBuilder; |
| 39 | + |
| 40 | + /// Presentation of body, background, and foreground |
| 41 | + final Widget Function(BuildContext, Widget, Widget, Widget)? presentationBuilder; |
| 42 | + |
| 43 | + /// Side insets calculation |
| 44 | + final EdgeInsets Function(BuildContext, EdgeInsets)? sideInsetsBuilder; |
| 45 | + |
| 46 | + const AdaptiveLayoutBuilder({ |
| 47 | + super.key, |
| 48 | + required this.bodyBuilder, |
| 49 | + this.mobileLayoutBuilder, |
| 50 | + this.horizontalMobileLayoutBuilder, |
| 51 | + this.narrowLayoutBuilder, |
| 52 | + this.wideLayoutBuilder, |
| 53 | + this.mobileBodyBuilder, |
| 54 | + this.horizontalMobileBodyBuilder, |
| 55 | + this.narrowBodyBuilder, |
| 56 | + this.wideBodyBuilder, |
| 57 | + this.topSideBuilder, |
| 58 | + this.bottomSideBuilder, |
| 59 | + this.leftSideBuilder, |
| 60 | + this.rightSideBuilder, |
| 61 | + this.backgroundBuilder, |
| 62 | + this.foregroundBuilder, |
| 63 | + this.paddingBuilder, |
| 64 | + this.alignBuilder, |
| 65 | + this.presentationBuilder, |
| 66 | + this.sideInsetsBuilder, |
| 67 | + }); |
| 68 | + |
| 69 | + @override |
| 70 | + Widget build(BuildContext context) { |
| 71 | + return LayoutBuilder( |
| 72 | + builder: (context, constraints) { |
| 73 | + final layoutType = AppLayout.currentScreenLayout(); |
| 74 | + |
| 75 | + // Build the appropriate body based on layout type |
| 76 | + var body = _buildBody(context, layoutType); |
| 77 | + |
| 78 | + // Apply padding |
| 79 | + body = paddingBuilder?.call(context, body) ?? body; |
| 80 | + |
| 81 | + // Build side widgets |
| 82 | + final topSide = topSideBuilder?.call(context, MediaQuery.of(context).viewInsets.top) ?? |
| 83 | + const SizedBox.shrink(); |
| 84 | + final bottomSide = |
| 85 | + bottomSideBuilder?.call(context, MediaQuery.of(context).viewInsets.bottom) ?? |
| 86 | + const SizedBox.shrink(); |
| 87 | + final leftSide = leftSideBuilder?.call(context, MediaQuery.of(context).viewInsets.left) ?? |
| 88 | + const SizedBox.shrink(); |
| 89 | + final rightSide = |
| 90 | + rightSideBuilder?.call(context, MediaQuery.of(context).viewInsets.right) ?? |
| 91 | + const SizedBox.shrink(); |
| 92 | + |
| 93 | + // Calculate side insets |
| 94 | + final sideInsets = sideInsetsBuilder?.call( |
| 95 | + context, |
| 96 | + EdgeInsets.only( |
| 97 | + left: letAsOrNull<PreferredSizeWidget>(leftSide)?.preferredSize.width ?? 0.0, |
| 98 | + right: letAsOrNull<PreferredSizeWidget>(rightSide)?.preferredSize.width ?? 0.0, |
| 99 | + top: letAsOrNull<PreferredSizeWidget>(topSide)?.preferredSize.height ?? 0.0, |
| 100 | + bottom: letAsOrNull<PreferredSizeWidget>(bottomSide)?.preferredSize.height ?? 0.0, |
| 101 | + ), |
| 102 | + ) ?? |
| 103 | + EdgeInsets.zero; |
| 104 | + |
| 105 | + // Align body with side insets |
| 106 | + body = alignBuilder?.call(context, body, sideInsets) ?? |
| 107 | + _defaultAlign(context, body, sideInsets); |
| 108 | + |
| 109 | + // Combine body with side widgets |
| 110 | + body = Stack( |
| 111 | + alignment: AlignmentDirectional.center, |
| 112 | + fit: StackFit.expand, |
| 113 | + children: [ |
| 114 | + body, |
| 115 | + Column( |
| 116 | + mainAxisSize: MainAxisSize.max, |
| 117 | + mainAxisAlignment: MainAxisAlignment.center, |
| 118 | + crossAxisAlignment: CrossAxisAlignment.center, |
| 119 | + children: [ |
| 120 | + topSide is PreferredSizeWidget |
| 121 | + ? ConstrainedBox( |
| 122 | + constraints: BoxConstraints.loose(topSide.preferredSize), |
| 123 | + child: topSide, |
| 124 | + ) |
| 125 | + : topSide, |
| 126 | + Expanded( |
| 127 | + child: Row( |
| 128 | + mainAxisSize: MainAxisSize.max, |
| 129 | + mainAxisAlignment: MainAxisAlignment.center, |
| 130 | + crossAxisAlignment: CrossAxisAlignment.center, |
| 131 | + children: [ |
| 132 | + leftSide is PreferredSizeWidget |
| 133 | + ? ConstrainedBox( |
| 134 | + constraints: BoxConstraints.loose(leftSide.preferredSize), |
| 135 | + child: leftSide, |
| 136 | + ) |
| 137 | + : leftSide, |
| 138 | + const Spacer(), |
| 139 | + rightSide is PreferredSizeWidget |
| 140 | + ? ConstrainedBox( |
| 141 | + constraints: BoxConstraints.loose(rightSide.preferredSize), |
| 142 | + child: rightSide, |
| 143 | + ) |
| 144 | + : rightSide, |
| 145 | + ], |
| 146 | + ), |
| 147 | + ), |
| 148 | + bottomSide is PreferredSizeWidget |
| 149 | + ? ConstrainedBox( |
| 150 | + constraints: BoxConstraints.loose(bottomSide.preferredSize), |
| 151 | + child: bottomSide, |
| 152 | + ) |
| 153 | + : bottomSide, |
| 154 | + ], |
| 155 | + ), |
| 156 | + ], |
| 157 | + ); |
| 158 | + |
| 159 | + // Apply presentation |
| 160 | + body = presentationBuilder?.call( |
| 161 | + context, |
| 162 | + body, |
| 163 | + backgroundBuilder?.call(context) ?? _defaultBackground(context), |
| 164 | + foregroundBuilder?.call(context) ?? _defaultForeground(context), |
| 165 | + ) ?? |
| 166 | + _defaultPresentation( |
| 167 | + context, |
| 168 | + body, |
| 169 | + backgroundBuilder?.call(context) ?? _defaultBackground(context), |
| 170 | + foregroundBuilder?.call(context) ?? _defaultForeground(context), |
| 171 | + ); |
| 172 | + |
| 173 | + // Apply layout |
| 174 | + body = _buildLayout(context, body, layoutType); |
| 175 | + |
| 176 | + return ColoredBox( |
| 177 | + color: Theme.of(context).colorScheme.surface, |
| 178 | + child: body, |
| 179 | + ); |
| 180 | + }, |
| 181 | + ); |
| 182 | + } |
| 183 | + |
| 184 | + /// Builds the body based on layout type |
| 185 | + Widget _buildBody(BuildContext context, AppLayout layoutType) { |
| 186 | + switch (layoutType) { |
| 187 | + case AppLayout.MOBILE: |
| 188 | + return mobileBodyBuilder?.call(context) ?? |
| 189 | + narrowBodyBuilder?.call(context) ?? |
| 190 | + bodyBuilder(context); |
| 191 | + case AppLayout.MOBILE_HORIZONTAL: |
| 192 | + return horizontalMobileBodyBuilder?.call(context) ?? |
| 193 | + wideBodyBuilder?.call(context) ?? |
| 194 | + bodyBuilder(context); |
| 195 | + case AppLayout.NARROW: |
| 196 | + return narrowBodyBuilder?.call(context) ?? bodyBuilder(context); |
| 197 | + case AppLayout.WIDE: |
| 198 | + return wideBodyBuilder?.call(context) ?? bodyBuilder(context); |
| 199 | + } |
| 200 | + } |
| 201 | + |
| 202 | + /// Builds the layout based on layout type |
| 203 | + Widget _buildLayout(BuildContext context, Widget body, AppLayout layoutType) { |
| 204 | + switch (layoutType) { |
| 205 | + case AppLayout.MOBILE: |
| 206 | + return mobileLayoutBuilder?.call(context, body) ?? |
| 207 | + narrowLayoutBuilder?.call(context, body) ?? |
| 208 | + body; |
| 209 | + case AppLayout.MOBILE_HORIZONTAL: |
| 210 | + return horizontalMobileLayoutBuilder?.call(context, body) ?? |
| 211 | + wideLayoutBuilder?.call(context, body) ?? |
| 212 | + body; |
| 213 | + case AppLayout.NARROW: |
| 214 | + return narrowLayoutBuilder?.call(context, body) ?? body; |
| 215 | + case AppLayout.WIDE: |
| 216 | + return wideLayoutBuilder?.call(context, body) ?? body; |
| 217 | + } |
| 218 | + } |
| 219 | +} |
| 220 | + |
| 221 | +/// Default alignment |
| 222 | +Widget _defaultAlign(BuildContext context, Widget body, EdgeInsets sideInsets) { |
| 223 | + return Padding( |
| 224 | + padding: sideInsets + MediaQuery.of(context).padding, |
| 225 | + child: body, |
| 226 | + ); |
| 227 | +} |
| 228 | + |
| 229 | +/// Default presentation |
| 230 | +Widget _defaultPresentation( |
| 231 | + BuildContext context, |
| 232 | + Widget body, |
| 233 | + Widget background, |
| 234 | + Widget foreground, |
| 235 | +) { |
| 236 | + return Stack( |
| 237 | + alignment: AlignmentDirectional.center, |
| 238 | + fit: StackFit.expand, |
| 239 | + children: [ |
| 240 | + background, |
| 241 | + Padding( |
| 242 | + padding: MediaQuery.viewInsetsOf(context), |
| 243 | + child: body, |
| 244 | + ), |
| 245 | + foreground, |
| 246 | + ], |
| 247 | + ); |
| 248 | +} |
| 249 | + |
| 250 | +/// Default background |
| 251 | +Widget _defaultBackground(BuildContext context) { |
| 252 | + return ColoredBox( |
| 253 | + color: Theme.of(context).colorScheme.surface, |
| 254 | + child: GestureDetector( |
| 255 | + onTap: () => FocusManager.instance.primaryFocus?.unfocus(), |
| 256 | + child: const SizedBox.expand(), |
| 257 | + ), |
| 258 | + ); |
| 259 | +} |
| 260 | + |
| 261 | +/// Default foreground |
| 262 | +Widget _defaultForeground(BuildContext context) { |
| 263 | + return const IgnorePointer(child: SizedBox.expand()); |
| 264 | +} |
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