mirror of
https://github.com/HChaZZY/PiliPlus.git
synced 2025-12-21 17:46:24 +08:00
feat: new img grid view
Signed-off-by: bggRGjQaUbCoE <githubaccount56556@proton.me>
This commit is contained in:
bggRGjQaUbCoE
274
lib/common/widgets/image/custom_grid_view.dart
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274
lib/common/widgets/image/custom_grid_view.dart
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/*
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* This file is part of PiliPlus
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*
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* PiliPlus is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* PiliPlus is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with PiliPlus. If not, see <https://www.gnu.org/licenses/>.
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*/
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import 'dart:math' show min;
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import 'package:PiliPlus/common/constants.dart';
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import 'package:PiliPlus/common/widgets/badge.dart';
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import 'package:PiliPlus/common/widgets/custom_layout.dart';
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import 'package:PiliPlus/common/widgets/image/network_img_layer.dart';
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import 'package:PiliPlus/models/common/badge_type.dart';
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import 'package:PiliPlus/models/common/image_preview_type.dart';
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import 'package:PiliPlus/utils/extension.dart';
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import 'package:PiliPlus/utils/page_utils.dart';
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import 'package:PiliPlus/utils/storage_pref.dart';
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import 'package:flutter/material.dart'
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hide CustomMultiChildLayout, MultiChildLayoutDelegate;
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class ImageModel {
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ImageModel({
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required num? width,
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required num? height,
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required this.url,
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this.liveUrl,
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}) {
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this.width = width == null || width == 0 ? 1 : width;
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this.height = height == null || height == 0 ? 1 : height;
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}
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late num width;
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late num height;
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String url;
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String? liveUrl;
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bool? _isLongPic;
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bool? _isLivePhoto;
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bool get isLongPic => _isLongPic ??= (height / width) > _maxRatio;
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bool get isLivePhoto =>
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_isLivePhoto ??= enableLivePhoto && liveUrl?.isNotEmpty == true;
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static bool enableLivePhoto = Pref.enableLivePhoto;
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}
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const double _maxRatio = 22 / 9;
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class CustomGridView extends StatelessWidget {
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const CustomGridView({
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super.key,
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this.space = 5,
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required this.maxWidth,
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required this.picArr,
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this.onViewImage,
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this.onDismissed,
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this.callback,
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});
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final double maxWidth;
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final double space;
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final List<ImageModel> picArr;
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final VoidCallback? onViewImage;
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final ValueChanged<int>? onDismissed;
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final Function(List<String>, int)? callback;
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void onTap(int index) {
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if (callback != null) {
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callback!(picArr.map((item) => item.url).toList(), index);
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} else {
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onViewImage?.call();
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PageUtils.imageView(
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initialPage: index,
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imgList: picArr.map(
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(item) {
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bool isLive = item.isLivePhoto;
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return SourceModel(
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sourceType: isLive
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? SourceType.livePhoto
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: SourceType.networkImage,
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url: item.url,
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liveUrl: isLive ? item.liveUrl : null,
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width: isLive ? item.width.toInt() : null,
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height: isLive ? item.height.toInt() : null,
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);
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},
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).toList(),
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onDismissed: onDismissed,
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);
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}
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}
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static BorderRadius borderRadius(
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int col,
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int length,
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int index, {
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Radius r = StyleString.imgRadius,
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}) {
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if (length == 1) return StyleString.mdRadius;
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final bool hasUp = index - col >= 0;
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final bool hasDown = index + col < length;
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final bool isRowStart = (index % col) == 0;
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final bool isRowEnd = (index % col) == col - 1 || index == length - 1;
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final bool hasLeft = !isRowStart;
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final bool hasRight = !isRowEnd && (index + 1) < length;
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return BorderRadius.only(
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topLeft: !hasUp && !hasLeft ? r : Radius.zero,
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topRight: !hasUp && !hasRight ? r : Radius.zero,
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bottomLeft: !hasDown && !hasLeft ? r : Radius.zero,
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bottomRight: !hasDown && !hasRight ? r : Radius.zero,
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);
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}
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@override
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Widget build(BuildContext context) {
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double imageWidth;
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double imageHeight;
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final length = picArr.length;
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final isSingle = length == 1;
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final isFour = length == 4;
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if (length == 2) {
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imageWidth = imageHeight = (maxWidth - space) / 2;
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} else {
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imageHeight = imageWidth = (maxWidth - 2 * space) / 3;
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if (isSingle) {
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final img = picArr.first;
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final width = img.width;
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final height = img.height;
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final ratioWH = width / height;
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final ratioHW = height / width;
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imageWidth = ratioWH > 1.5
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? maxWidth
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: (ratioWH >= 1 || (height > width && ratioHW < 1.5))
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? 2 * imageWidth
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: 1.5 * imageWidth;
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if (width != 1) {
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imageWidth = min(imageWidth, width.toDouble());
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}
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imageHeight = imageWidth * min(ratioHW, _maxRatio);
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}
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}
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final int column = isFour ? 2 : 3;
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final int row = isFour ? 2 : (length / 3).ceil();
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late final placeHolder = Container(
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width: imageWidth,
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height: imageHeight,
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decoration: BoxDecoration(
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color: Theme.of(
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context,
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).colorScheme.onInverseSurface.withValues(alpha: 0.4),
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),
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child: Center(
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child: Image.asset(
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'assets/images/loading.png',
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width: imageWidth,
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height: imageHeight,
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cacheWidth: imageWidth.cacheSize(context),
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),
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),
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);
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return Padding(
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padding: const EdgeInsets.only(top: 6),
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child: SizedBox(
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width: maxWidth,
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height: imageHeight * row + space * (row - 1),
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child: CustomMultiChildLayout(
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delegate: _CustomGridViewDelegate(
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space: space,
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itemCount: length,
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column: column,
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width: imageWidth,
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height: imageHeight,
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),
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children: List.generate(length, (index) {
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final item = picArr[index];
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final radius = borderRadius(column, length, index);
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return LayoutId(
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id: index,
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child: Hero(
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tag: item.url,
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child: GestureDetector(
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onTap: () => onTap(index),
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child: Stack(
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clipBehavior: Clip.none,
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alignment: Alignment.center,
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children: [
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ClipRRect(
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borderRadius: radius,
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child: NetworkImgLayer(
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radius: 0,
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src: item.url,
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width: imageWidth,
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height: imageHeight,
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isLongPic: item.isLongPic,
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forceUseCacheWidth: item.width <= item.height,
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getPlaceHolder: () => placeHolder,
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),
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),
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if (item.isLivePhoto)
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const PBadge(
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text: 'Live',
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right: 8,
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bottom: 8,
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type: PBadgeType.gray,
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)
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else if (item.isLongPic)
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const PBadge(
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text: '长图',
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right: 8,
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bottom: 8,
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),
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],
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),
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),
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),
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);
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}),
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),
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),
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);
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}
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}
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class _CustomGridViewDelegate extends MultiChildLayoutDelegate {
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_CustomGridViewDelegate({
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required this.space,
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required this.itemCount,
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required this.column,
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required this.width,
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required this.height,
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});
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final double space;
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final int itemCount;
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final int column;
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final double width;
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final double height;
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@override
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void performLayout(Size size) {
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final constraints = BoxConstraints.loose(Size(width, height));
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for (int i = 0; i < itemCount; i++) {
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layoutChild(i, constraints);
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positionChild(
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i,
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Offset(
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(space + width) * (i % column),
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(space + height) * (i ~/ column),
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),
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);
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}
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}
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@override
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bool shouldRelayout(_CustomGridViewDelegate oldDelegate) {
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return space != oldDelegate.space || itemCount != oldDelegate.itemCount;
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}
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}
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