mirror of
https://github.com/bggRGjQaUbCoE/PiliPlus.git
synced 2026-04-21 11:22:16 +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
Normal file
274
lib/common/widgets/image/custom_grid_view.dart
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@@ -0,0 +1,274 @@
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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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@@ -1,200 +0,0 @@
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import 'dart:math';
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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/image/network_img_layer.dart';
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import 'package:PiliPlus/common/widgets/image/nine_grid_view.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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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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|
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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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Widget imageView(
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double maxWidth,
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List<ImageModel> picArr, {
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VoidCallback? onViewImage,
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ValueChanged<int>? onDismissed,
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Function(List<String>, int)? callback,
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}) {
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double imageWidth = (maxWidth - 10) / 3;
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double imageHeight = imageWidth;
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if (picArr.length == 1) {
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num width = picArr[0].width;
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num height = picArr[0].height;
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double ratioWH = width / height;
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double 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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} else if (picArr.length == 2) {
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imageWidth = imageHeight = 2 * imageWidth;
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}
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late final int row = picArr.length == 4 ? 2 : 3;
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BorderRadius borderRadius(index) {
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if (picArr.length == 1) {
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return StyleString.mdRadius;
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}
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return BorderRadius.only(
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topLeft:
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index - row >= 0 ||
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((index - 1) >= 0 && (index - 1) % row < index % row)
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? Radius.zero
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: StyleString.imgRadius,
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topRight:
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index - row >= 0 ||
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((index + 1) < picArr.length && (index + 1) % row > index % row)
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? Radius.zero
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: StyleString.imgRadius,
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bottomLeft:
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index + row < picArr.length ||
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((index - 1) >= 0 && (index - 1) % row < index % row)
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||||
? Radius.zero
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: StyleString.imgRadius,
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bottomRight:
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index + row < picArr.length ||
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((index + 1) < picArr.length && (index + 1) % row > index % row)
|
||||
? Radius.zero
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||||
: StyleString.imgRadius,
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||||
);
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}
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||||
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int parseSize(size) {
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return switch (size) {
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||||
int() => size,
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||||
double() => size.round(),
|
||||
String() => int.tryParse(size) ?? 1,
|
||||
_ => 1,
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||||
};
|
||||
}
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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 {
|
||||
onViewImage?.call();
|
||||
PageUtils.imageView(
|
||||
initialPage: index,
|
||||
imgList: picArr.map(
|
||||
(item) {
|
||||
bool isLive = item.isLivePhoto;
|
||||
return SourceModel(
|
||||
sourceType: isLive
|
||||
? SourceType.livePhoto
|
||||
: SourceType.networkImage,
|
||||
url: item.url,
|
||||
liveUrl: isLive ? item.liveUrl : null,
|
||||
width: isLive ? parseSize(item.width) : null,
|
||||
height: isLive ? parseSize(item.height) : null,
|
||||
);
|
||||
},
|
||||
).toList(),
|
||||
onDismissed: onDismissed,
|
||||
);
|
||||
}
|
||||
}
|
||||
|
||||
return NineGridView(
|
||||
type: NineGridType.weiBo,
|
||||
margin: const EdgeInsets.only(top: 6),
|
||||
bigImageWidth: imageWidth,
|
||||
bigImageHeight: imageHeight,
|
||||
space: 5,
|
||||
height: picArr.length == 1 ? imageHeight : null,
|
||||
width: picArr.length == 1 ? imageWidth : maxWidth,
|
||||
itemCount: picArr.length,
|
||||
itemBuilder: (context, index) {
|
||||
final item = picArr[index];
|
||||
return Hero(
|
||||
tag: item.url,
|
||||
child: GestureDetector(
|
||||
onTap: () => onTap(index),
|
||||
child: Stack(
|
||||
clipBehavior: Clip.none,
|
||||
alignment: Alignment.center,
|
||||
children: [
|
||||
ClipRRect(
|
||||
borderRadius: borderRadius(index),
|
||||
child: NetworkImgLayer(
|
||||
radius: 0,
|
||||
src: item.url,
|
||||
width: imageWidth,
|
||||
height: imageHeight,
|
||||
isLongPic: item.isLongPic,
|
||||
forceUseCacheWidth: item.width <= item.height,
|
||||
getPlaceHolder: () {
|
||||
return Container(
|
||||
width: imageWidth,
|
||||
height: imageHeight,
|
||||
decoration: BoxDecoration(
|
||||
color: Theme.of(
|
||||
context,
|
||||
).colorScheme.onInverseSurface.withValues(alpha: 0.4),
|
||||
borderRadius: borderRadius(index),
|
||||
),
|
||||
child: Center(
|
||||
child: Image.asset(
|
||||
'assets/images/loading.png',
|
||||
width: imageWidth,
|
||||
height: imageHeight,
|
||||
cacheWidth: imageWidth.cacheSize(context),
|
||||
),
|
||||
),
|
||||
);
|
||||
},
|
||||
),
|
||||
),
|
||||
if (item.isLivePhoto)
|
||||
const PBadge(
|
||||
text: 'Live',
|
||||
right: 8,
|
||||
bottom: 8,
|
||||
type: PBadgeType.gray,
|
||||
)
|
||||
else if (item.isLongPic)
|
||||
const PBadge(
|
||||
text: '长图',
|
||||
right: 8,
|
||||
bottom: 8,
|
||||
),
|
||||
],
|
||||
),
|
||||
),
|
||||
);
|
||||
},
|
||||
);
|
||||
}
|
||||
@@ -1,595 +0,0 @@
|
||||
import 'dart:async';
|
||||
import 'dart:collection';
|
||||
import 'dart:math' as math;
|
||||
|
||||
import 'package:flutter/material.dart';
|
||||
|
||||
/**
|
||||
* @Author: Sky24n
|
||||
* @GitHub: https://github.com/Sky24n
|
||||
* @Description: NineGridView.
|
||||
* @Date: 2020/06/16
|
||||
*/
|
||||
|
||||
/// NineGridView Type.
|
||||
enum NineGridType {
|
||||
/// normal NineGridView.
|
||||
normal,
|
||||
|
||||
/// like WeChat NineGridView.
|
||||
weChat,
|
||||
|
||||
/// like WeiBo International NineGridView.
|
||||
weiBo,
|
||||
|
||||
/// like WeChat group.
|
||||
weChatGp,
|
||||
|
||||
/// like DingTalk group.
|
||||
dingTalkGp,
|
||||
|
||||
/// like QQ group.
|
||||
qqGp,
|
||||
}
|
||||
|
||||
/// big images size cache map.
|
||||
Map<String, Rect> ngvBigImageSizeMap = HashMap();
|
||||
|
||||
/// NineGridView.
|
||||
/// like WeChat, WeiBo International, WeChat group, DingTalk group, QQ group.
|
||||
///
|
||||
/// Another [NineGridView](https://github.com/flutterchina/flukit) in [flukit](https://github.com/flutterchina/flukit) UI Kit，using GridView implementation。
|
||||
class NineGridView extends StatefulWidget {
|
||||
/// create NineGridView.
|
||||
/// If you want to show a single big picture.
|
||||
/// It is recommended to use a medium-quality picture, because the original picture is too large and takes time to load.
|
||||
/// 单张大图建议使用中等质量图片，因为原图太大加载耗时。
|
||||
/// you need input (bigImageWidth + bigImageHeight) or (bigImage + bigImageUrl).
|
||||
const NineGridView({
|
||||
super.key,
|
||||
this.width,
|
||||
this.height,
|
||||
this.space = 3,
|
||||
this.arcAngle = 0,
|
||||
this.initIndex = 1,
|
||||
this.padding = EdgeInsets.zero,
|
||||
this.margin = EdgeInsets.zero,
|
||||
this.alignment,
|
||||
this.color,
|
||||
this.decoration,
|
||||
this.type = NineGridType.weChat,
|
||||
required this.itemCount,
|
||||
required this.itemBuilder,
|
||||
this.bigImageWidth,
|
||||
this.bigImageHeight,
|
||||
this.bigImage,
|
||||
this.bigImageUrl,
|
||||
});
|
||||
|
||||
/// View width.
|
||||
final double? width;
|
||||
|
||||
/// View height.
|
||||
final double? height;
|
||||
|
||||
/// The number of logical pixels between each child.
|
||||
final double space;
|
||||
|
||||
/// QQ group arc angle (0 ~ 180).
|
||||
final double arcAngle;
|
||||
|
||||
/// QQ group init index (0 or 1). def 1.
|
||||
final int initIndex;
|
||||
|
||||
/// View padding.
|
||||
final EdgeInsets padding;
|
||||
|
||||
/// View margin.
|
||||
final EdgeInsets margin;
|
||||
|
||||
/// Align the [child] within the container.
|
||||
final AlignmentGeometry? alignment;
|
||||
|
||||
/// The color to paint behind the [child].
|
||||
final Color? color;
|
||||
|
||||
/// The decoration to paint behind the [child].
|
||||
final Decoration? decoration;
|
||||
|
||||
/// NineGridView type.
|
||||
final NineGridType type;
|
||||
|
||||
/// The total number of children this delegate can provide.
|
||||
final int itemCount;
|
||||
|
||||
/// Called to build children for the view.
|
||||
final IndexedWidgetBuilder itemBuilder;
|
||||
|
||||
/// Single big picture width.
|
||||
final double? bigImageWidth;
|
||||
|
||||
/// Single big picture height.
|
||||
final double? bigImageHeight;
|
||||
|
||||
/// It is recommended to use a medium-quality picture, because the original picture is too large and takes time to load.
|
||||
/// 单张大图建议使用中等质量图片，因为原图太大加载耗时。
|
||||
/// Single big picture Image.
|
||||
final Image? bigImage;
|
||||
|
||||
/// Single big picture url.
|
||||
final String? bigImageUrl;
|
||||
|
||||
@override
|
||||
State<StatefulWidget> createState() {
|
||||
return _NineGridViewState();
|
||||
}
|
||||
}
|
||||
|
||||
/// _NineGridViewState.
|
||||
class _NineGridViewState extends State<NineGridView> {
|
||||
/// init view size.
|
||||
Rect _initSize(BuildContext context) {
|
||||
EdgeInsets padding = widget.padding;
|
||||
if (widget.itemCount == 0) {
|
||||
return Rect.fromLTRB(0, 0, padding.horizontal, padding.vertical);
|
||||
}
|
||||
double width =
|
||||
widget.width ??
|
||||
(MediaQuery.sizeOf(context).width - widget.margin.horizontal);
|
||||
width = width - padding.horizontal;
|
||||
double space = widget.space;
|
||||
double itemW;
|
||||
if (widget.type == NineGridType.weiBo &&
|
||||
(widget.itemCount == 1 || widget.itemCount == 2)) {
|
||||
// || itemCount == 4
|
||||
itemW = (width - space) / 2;
|
||||
} else {
|
||||
itemW = (width - space * 2) / 3;
|
||||
}
|
||||
bool fourGrid =
|
||||
(widget.itemCount == 4 && widget.type != NineGridType.normal);
|
||||
int column = fourGrid ? 2 : math.min(3, widget.itemCount);
|
||||
int row = fourGrid ? 2 : (widget.itemCount / 3).ceil();
|
||||
double realWidth =
|
||||
itemW * column + space * (column - 1) + padding.horizontal;
|
||||
double realHeight = itemW * row + space * (row - 1) + padding.vertical;
|
||||
return Rect.fromLTRB(itemW, 0, realWidth, realHeight);
|
||||
}
|
||||
|
||||
/// build nine grid view.
|
||||
Widget _buildChild(BuildContext context, double itemW) {
|
||||
double space = widget.space;
|
||||
int column = (widget.itemCount == 4 && widget.type != NineGridType.normal)
|
||||
? 2
|
||||
: 3;
|
||||
List<Widget> list = [];
|
||||
for (int i = 0; i < widget.itemCount; i++) {
|
||||
list.add(
|
||||
Positioned(
|
||||
top: (space + itemW) * (i ~/ column),
|
||||
left: (space + itemW) * (i % column),
|
||||
child: SizedBox(
|
||||
width: itemW,
|
||||
height: itemW,
|
||||
child: widget.itemBuilder(context, i),
|
||||
),
|
||||
),
|
||||
);
|
||||
}
|
||||
return Stack(
|
||||
clipBehavior: Clip.none,
|
||||
children: list,
|
||||
);
|
||||
}
|
||||
|
||||
/// build one child.
|
||||
Widget? _buildOneChild(BuildContext context) {
|
||||
double? bigImgWidth = widget.bigImageWidth?.toDouble();
|
||||
double? bigImgHeight = widget.bigImageHeight?.toDouble();
|
||||
if (!_isZero(bigImgWidth) && !_isZero(bigImgHeight)) {
|
||||
return _getOneChild(context, bigImgWidth!, bigImgHeight!);
|
||||
} else if (widget.bigImage != null) {
|
||||
String bigImageUrl = widget.bigImageUrl!;
|
||||
Rect? bigImgRect = ngvBigImageSizeMap[bigImageUrl];
|
||||
bigImgWidth = bigImgRect?.width;
|
||||
bigImgHeight = bigImgRect?.height;
|
||||
if (!_isZero(bigImgWidth) && !_isZero(bigImgHeight)) {
|
||||
return _getOneChild(context, bigImgWidth!, bigImgHeight!);
|
||||
} else {
|
||||
_ImageUtil()
|
||||
.getImageSize(widget.bigImage)
|
||||
?.then((rect) {
|
||||
ngvBigImageSizeMap[bigImageUrl] = rect;
|
||||
if (!mounted) return;
|
||||
setState(() {});
|
||||
})
|
||||
.catchError((e) {});
|
||||
}
|
||||
}
|
||||
return null;
|
||||
}
|
||||
|
||||
/// get one child.
|
||||
Widget _getOneChild(BuildContext context, double width, double height) {
|
||||
Rect rect = _getBigImgSize(width, height);
|
||||
return SizedBox(
|
||||
width: rect.width,
|
||||
height: rect.height,
|
||||
child: widget.itemBuilder(context, 0),
|
||||
);
|
||||
}
|
||||
|
||||
/// build weChat group.
|
||||
Widget _buildWeChatGroup(BuildContext context) {
|
||||
double width = widget.width! - widget.padding.horizontal;
|
||||
double space = widget.space;
|
||||
double itemW;
|
||||
|
||||
int column = widget.itemCount < 5 ? 2 : 3;
|
||||
int row = 0;
|
||||
if (widget.itemCount == 1) {
|
||||
row = 1;
|
||||
itemW = width;
|
||||
} else if (widget.itemCount < 5) {
|
||||
row = widget.itemCount == 2 ? 1 : 2;
|
||||
itemW = (width - space) / 2;
|
||||
} else if (widget.itemCount < 7) {
|
||||
row = 2;
|
||||
itemW = (width - space * 2) / 3;
|
||||
} else {
|
||||
row = 3;
|
||||
itemW = (width - space * 2) / 3;
|
||||
}
|
||||
|
||||
int first = widget.itemCount % column;
|
||||
List<Widget> list = [];
|
||||
for (int i = 0; i < widget.itemCount; i++) {
|
||||
double left;
|
||||
if (first > 0 && i < first) {
|
||||
left =
|
||||
(width - itemW * first - space * (first - 1)) / 2 +
|
||||
(itemW + space) * i;
|
||||
} else {
|
||||
left = (space + itemW) * ((i - first) % column);
|
||||
}
|
||||
|
||||
int itemIndex = (first > 0 && i < first)
|
||||
? 0
|
||||
: (first > 0 ? (i + column - first) : i) ~/ column;
|
||||
|
||||
double top =
|
||||
(width - itemW * row - space * (row - 1)) / 2 +
|
||||
(space + itemW) * itemIndex;
|
||||
|
||||
list.add(
|
||||
Positioned(
|
||||
top: top,
|
||||
left: left,
|
||||
child: SizedBox(
|
||||
width: itemW,
|
||||
height: itemW,
|
||||
child: widget.itemBuilder(context, i),
|
||||
),
|
||||
),
|
||||
);
|
||||
}
|
||||
return Stack(
|
||||
clipBehavior: Clip.none,
|
||||
children: list,
|
||||
);
|
||||
}
|
||||
|
||||
/// build dingTalk group.
|
||||
Widget _buildDingTalkGroup(BuildContext context) {
|
||||
double width = widget.width! - widget.padding.horizontal;
|
||||
int itemCount = math.min(4, widget.itemCount);
|
||||
double itemW = (width - widget.space) / 2;
|
||||
List<Widget> children = [];
|
||||
for (int i = 0; i < itemCount; i++) {
|
||||
children.add(
|
||||
Positioned(
|
||||
top: (widget.space + itemW) * (i ~/ 2),
|
||||
left:
|
||||
(widget.space + itemW) *
|
||||
(((itemCount == 3 && i == 2) ? i + 1 : i) % 2),
|
||||
child: SizedBox(
|
||||
width: itemCount == 1 ? width : itemW,
|
||||
height:
|
||||
(itemCount == 1 || itemCount == 2 || (itemCount == 3 && i == 0))
|
||||
? width
|
||||
: itemW,
|
||||
child: widget.itemBuilder(context, i),
|
||||
),
|
||||
),
|
||||
);
|
||||
}
|
||||
return ClipOval(
|
||||
child: Stack(
|
||||
clipBehavior: Clip.none,
|
||||
children: children,
|
||||
),
|
||||
);
|
||||
}
|
||||
|
||||
/// build QQ group.
|
||||
Widget _buildQQGroup(BuildContext context) {
|
||||
double width = widget.width! - widget.padding.horizontal;
|
||||
int itemCount = math.min(5, widget.itemCount);
|
||||
if (itemCount == 1) {
|
||||
return ClipOval(
|
||||
child: SizedBox(
|
||||
width: width,
|
||||
height: width,
|
||||
child: widget.itemBuilder(context, 0),
|
||||
),
|
||||
);
|
||||
}
|
||||
|
||||
List<Widget> children = [];
|
||||
double startDegree = 0;
|
||||
double r = 0;
|
||||
double r1 = 0;
|
||||
double centerX = width / 2;
|
||||
double centerY = width / 2;
|
||||
switch (itemCount) {
|
||||
case 2:
|
||||
startDegree = 135;
|
||||
r = width / (2 + 2 * math.sin(math.pi / 4));
|
||||
r1 = r;
|
||||
break;
|
||||
case 3:
|
||||
startDegree = 210;
|
||||
r = width / (2 + 4 * math.sin(math.pi * (3 - 2) / (2 * 3)));
|
||||
r1 = r / math.cos(math.pi * (3 - 2) / (2 * 3));
|
||||
double R =
|
||||
r *
|
||||
(1 + math.sin(math.pi / itemCount)) /
|
||||
math.sin(math.pi / itemCount);
|
||||
double dy = 0.5 * (width - R - r * (1 + 1 / math.tan(math.pi / 3)));
|
||||
centerY = dy + r + r1;
|
||||
break;
|
||||
case 4:
|
||||
startDegree = 180;
|
||||
r = width / 4;
|
||||
r1 = r / math.cos(math.pi / 4);
|
||||
break;
|
||||
case 5:
|
||||
startDegree = 126;
|
||||
r = width / (2 + 4 * math.sin(math.pi * (5 - 2) / (2 * 5)));
|
||||
r1 = r / math.cos(math.pi * (5 - 2) / (2 * 5));
|
||||
double R =
|
||||
r *
|
||||
(1 + math.sin(math.pi / itemCount)) /
|
||||
math.sin(math.pi / itemCount);
|
||||
double dy = 0.5 * (width - R - r * (1 + 1 / math.tan(math.pi / 5)));
|
||||
centerY = dy + r + r1;
|
||||
break;
|
||||
}
|
||||
|
||||
for (int i = 0; i < itemCount; i++) {
|
||||
double degree1 = (itemCount == 2 || itemCount == 4) ? (-math.pi / 4) : 0;
|
||||
double x = centerX + r1 * math.sin(degree1 + i * 2 * math.pi / itemCount);
|
||||
double y = centerY - r1 * math.cos(degree1 + i * 2 * math.pi / itemCount);
|
||||
|
||||
double degree = startDegree + i * 2 * 180 / itemCount;
|
||||
if (degree >= 360) degree = degree % 360;
|
||||
double previousX = r + 2 * r * math.sin(degree / 180 * math.pi);
|
||||
double previousY = r - 2 * r * math.cos(degree / 180 * math.pi);
|
||||
|
||||
Widget child = Positioned.fromRect(
|
||||
rect: Rect.fromCircle(center: Offset(x, y), radius: r),
|
||||
child: ClipPath(
|
||||
clipper: QQClipper(
|
||||
total: itemCount,
|
||||
index: i,
|
||||
initIndex: widget.initIndex,
|
||||
previousX: previousX,
|
||||
previousY: previousY,
|
||||
degree: degree,
|
||||
arcAngle: widget.arcAngle,
|
||||
space: widget.space,
|
||||
),
|
||||
child: widget.itemBuilder(context, i),
|
||||
),
|
||||
);
|
||||
children.add(child);
|
||||
}
|
||||
|
||||
return Stack(
|
||||
clipBehavior: Clip.none,
|
||||
children: children,
|
||||
);
|
||||
}
|
||||
|
||||
/// double is zero.
|
||||
bool _isZero(double? value) {
|
||||
return value == null || value == 0;
|
||||
}
|
||||
|
||||
/// get big image size.
|
||||
Rect _getBigImgSize(double originalWidth, double originalHeight) {
|
||||
double width =
|
||||
widget.width ??
|
||||
(MediaQuery.sizeOf(context).width - widget.margin.horizontal);
|
||||
width = width - widget.padding.horizontal;
|
||||
double itemW = (width - widget.space * 2) / 3;
|
||||
|
||||
// double devicePixelRatio = MediaQuery.devicePixelRatioOf(context);
|
||||
double devicePixelRatio = 1.0;
|
||||
double tempWidth = originalWidth / devicePixelRatio;
|
||||
double tempHeight = originalHeight / devicePixelRatio;
|
||||
double maxW = itemW * 2 + widget.space;
|
||||
double minW = width / 2;
|
||||
|
||||
double relWidth = tempWidth >= maxW ? maxW : math.max(minW, tempWidth);
|
||||
|
||||
double relHeight;
|
||||
double ratio = tempWidth / tempHeight;
|
||||
if (tempWidth == tempHeight) {
|
||||
relHeight = relWidth;
|
||||
} else if (tempWidth > tempHeight) {
|
||||
relHeight = relWidth / (math.min(ratio, 4 / 3));
|
||||
} else {
|
||||
relHeight = relWidth / (math.max(ratio, 3 / 4));
|
||||
}
|
||||
return Rect.fromLTRB(0, 0, relWidth, relHeight);
|
||||
}
|
||||
|
||||
@override
|
||||
Widget build(BuildContext context) {
|
||||
Widget? child;
|
||||
double? realWidth = widget.width;
|
||||
double? realHeight = widget.height;
|
||||
switch (widget.type) {
|
||||
case NineGridType.normal:
|
||||
case NineGridType.weiBo:
|
||||
case NineGridType.weChat:
|
||||
Rect size = _initSize(context);
|
||||
if (widget.itemCount == 1) {
|
||||
child = _buildOneChild(context);
|
||||
if (child == null) {
|
||||
realWidth = size.right;
|
||||
realHeight = size.bottom;
|
||||
child = _buildChild(context, size.left);
|
||||
}
|
||||
} else {
|
||||
realWidth = size.right;
|
||||
realHeight = size.bottom;
|
||||
child = _buildChild(context, size.left);
|
||||
}
|
||||
break;
|
||||
case NineGridType.weChatGp:
|
||||
child = _buildWeChatGroup(context);
|
||||
break;
|
||||
case NineGridType.dingTalkGp:
|
||||
child = _buildDingTalkGroup(context);
|
||||
break;
|
||||
case NineGridType.qqGp:
|
||||
child = _buildQQGroup(context);
|
||||
break;
|
||||
}
|
||||
return Container(
|
||||
alignment: widget.alignment,
|
||||
color: widget.color,
|
||||
decoration: widget.decoration,
|
||||
margin: widget.margin,
|
||||
padding: widget.padding,
|
||||
width: realWidth,
|
||||
height: realHeight,
|
||||
child: child,
|
||||
);
|
||||
}
|
||||
}
|
||||
|
||||
/// image util.
|
||||
class _ImageUtil {
|
||||
late ImageStreamListener listener;
|
||||
late ImageStream imageStream;
|
||||
|
||||
/// get image size.
|
||||
Future<Rect>? getImageSize(Image? image) {
|
||||
if (image == null) {
|
||||
return null;
|
||||
}
|
||||
Completer<Rect> completer = Completer<Rect>();
|
||||
listener = ImageStreamListener(
|
||||
(ImageInfo info, bool synchronousCall) {
|
||||
imageStream.removeListener(listener);
|
||||
if (!completer.isCompleted) {
|
||||
completer.complete(
|
||||
Rect.fromLTWH(
|
||||
0,
|
||||
0,
|
||||
info.image.width.toDouble(),
|
||||
info.image.height.toDouble(),
|
||||
),
|
||||
);
|
||||
}
|
||||
},
|
||||
onError: (dynamic exception, StackTrace? stackTrace) {
|
||||
imageStream.removeListener(listener);
|
||||
if (!completer.isCompleted) {
|
||||
completer.completeError(exception, stackTrace);
|
||||
}
|
||||
},
|
||||
);
|
||||
imageStream = image.image.resolve(ImageConfiguration.empty);
|
||||
imageStream.addListener(listener);
|
||||
return completer.future;
|
||||
}
|
||||
}
|
||||
|
||||
/// QQ Clipper.
|
||||
class QQClipper extends CustomClipper<Path> {
|
||||
QQClipper({
|
||||
this.total = 0,
|
||||
this.index = 0,
|
||||
this.initIndex = 1,
|
||||
this.previousX = 0,
|
||||
this.previousY = 0,
|
||||
this.degree = 0,
|
||||
this.arcAngle = 0,
|
||||
this.space = 0,
|
||||
}) : assert(arcAngle >= 0 && arcAngle <= 180);
|
||||
|
||||
final int total;
|
||||
final int index;
|
||||
final int initIndex;
|
||||
final double previousX;
|
||||
final double previousY;
|
||||
final double degree;
|
||||
final double arcAngle;
|
||||
final double space;
|
||||
|
||||
@override
|
||||
Path getClip(Size size) {
|
||||
double r = size.width / 2;
|
||||
Path path = Path();
|
||||
List<Offset> points = [];
|
||||
|
||||
if (total == 2 && index == initIndex) {
|
||||
path.addOval(Rect.fromLTRB(0, 0, size.width, size.height));
|
||||
} else {
|
||||
/// arcAngle and space, prefer to use arcAngle.
|
||||
double spaceA = arcAngle > 0
|
||||
? (arcAngle / 2)
|
||||
: (math.acos((r - math.min(r, space)) / r) / math.pi * 180);
|
||||
double startA = degree + spaceA;
|
||||
double endA = degree - spaceA;
|
||||
for (double i = startA; i <= 360 + endA; i = i + 1) {
|
||||
double x1 = r + r * math.sin(d2r(i));
|
||||
double y1 = r - r * math.cos(d2r(i));
|
||||
points.add(Offset(x1, y1));
|
||||
}
|
||||
|
||||
double spaceB =
|
||||
math.atan(
|
||||
r * math.sin(d2r(spaceA)) / (2 * r - r * math.cos(d2r(spaceA))),
|
||||
) /
|
||||
math.pi *
|
||||
180;
|
||||
double r1 = (2 * r - r * math.cos(d2r(spaceA))) / math.cos(d2r(spaceB));
|
||||
double startB = degree - 180 - spaceB;
|
||||
double endB = degree - 180 + spaceB;
|
||||
List<Offset> pointsB = [];
|
||||
for (double i = startB; i < endB; i = i + 1) {
|
||||
double x1 = previousX + r1 * math.sin(d2r(i));
|
||||
double y1 = previousY - r1 * math.cos(d2r(i));
|
||||
pointsB.add(Offset(x1, y1));
|
||||
}
|
||||
points.addAll(pointsB.reversed);
|
||||
path.addPolygon(points, true);
|
||||
}
|
||||
return path;
|
||||
}
|
||||
|
||||
/// degree to radian.
|
||||
double d2r(double degree) {
|
||||
return degree / 180 * math.pi;
|
||||
}
|
||||
|
||||
@override
|
||||
bool shouldReclip(CustomClipper<Path> oldClipper) {
|
||||
return this != oldClipper;
|
||||
}
|
||||
}
|
||||
Reference in New Issue
Block a user