mirror of
https://github.com/bggRGjQaUbCoE/PiliPlus.git
synced 2026-04-20 11:08:03 +08:00
118 lines
3.6 KiB
Dart
118 lines
3.6 KiB
Dart
/*
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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' as math;
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import 'package:flutter/material.dart';
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import 'package:flutter/rendering.dart'
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show
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ContainerRenderObjectMixin,
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MultiChildLayoutParentData,
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RenderBoxContainerDefaultsMixin,
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BoxHitTestResult;
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const double kHeaderHeight = 135.0;
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const double kAvatarSize = 80.0;
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const double _kAvatarLeftPadding = 20.0;
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const double _kAvatarTopPadding = 110.0;
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const double _kAvatarEffectiveHeight =
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kAvatarSize - (kHeaderHeight - _kAvatarTopPadding);
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const double _kActionsTopPadding = 140.0;
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const double _kActionsLeftPadding = 160.0;
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const double _kActionsRightPadding = 15.0;
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enum HeaderType { header, avatar, actions }
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class HeaderLayoutWidget extends MultiChildRenderObjectWidget {
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const HeaderLayoutWidget({
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super.key,
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super.children,
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});
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@override
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RenderObject createRenderObject(BuildContext context) {
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return RenderHeaderWidget();
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}
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}
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class RenderHeaderWidget extends RenderBox
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with
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ContainerRenderObjectMixin<RenderBox, MultiChildLayoutParentData>,
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RenderBoxContainerDefaultsMixin<RenderBox, MultiChildLayoutParentData> {
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@override
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void setupParentData(RenderBox child) {
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if (child.parentData is! MultiChildLayoutParentData) {
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child.parentData = MultiChildLayoutParentData();
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}
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}
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@override
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void performLayout() {
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double height = kHeaderHeight;
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RenderBox? child = firstChild;
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final maxWidth = constraints.maxWidth;
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while (child != null) {
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final childParentData = child.parentData! as MultiChildLayoutParentData;
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switch (childParentData.id as HeaderType) {
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case HeaderType.header:
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child.layout(constraints);
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childParentData.offset = .zero;
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case HeaderType.avatar:
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child.layout(constraints);
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childParentData.offset = const Offset(
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_kAvatarLeftPadding,
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_kAvatarTopPadding,
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);
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case HeaderType.actions:
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final childSize =
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(child..layout(
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BoxConstraints(
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maxWidth:
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maxWidth -
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_kActionsLeftPadding -
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_kActionsRightPadding,
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),
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parentUsesSize: true,
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))
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.size;
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height += (math.max(_kAvatarEffectiveHeight, childSize.height)) + 5.0;
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childParentData.offset = Offset(
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maxWidth - childSize.width - _kActionsRightPadding,
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_kActionsTopPadding,
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);
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}
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child = childParentData.nextSibling;
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}
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size = constraints.constrainDimensions(maxWidth, height);
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}
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@override
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void paint(PaintingContext context, Offset offset) {
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defaultPaint(context, offset);
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}
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@override
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bool hitTestChildren(BoxHitTestResult result, {required Offset position}) {
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return defaultHitTestChildren(result, position: position);
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}
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}
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