kmpdfkit_demo/lib/widgets/function/attrwidget/stamp/attr_stamp_widget.dart

import 'dart:io';

import 'package:flutter/material.dart';
import 'package:kmpdfkit_demo/widgets/contains.dart';
import 'package:kmpdfkit_demo/widgets/function/attrwidget/stamp/attr_custom_stamp_edit_widget.dart';
import 'package:kmpdfkit_demo/widgets/models/standard_stamp_bean.dart';
import 'package:kmpdfkit_demo/widgets/models/text_stamp_bean.dart';
import 'package:kmpdfkit_demo/widgets/util/stamp_util.dart';

///  attr_stamp_widget.dart
///
///  Copyright © 2014-2023 PDF Technologies, Inc. All Rights Reserved.
///
///  THIS SOURCE CODE AND ANY ACCOMPANYING DOCUMENTATION ARE PROTECTED BY INTERNATIONAL COPYRIGHT LAW
///  AND MAY NOT BE RESOLD OR REDISTRIBUTED. USAGE IS BOUND TO THE ComPDFKit LICENSE AGREEMENT.
///  UNAUTHORIZED REPRODUCTION OR DISTRIBUTION IS SUBJECT TO CIVIL AND CRIMINAL PENALTIES.
///  This notice may not be removed from this file.

var standardStampList = [
  StandardStampBean(StandardStamp.approved, 'ic_stamp_app_roved.png'),
  StandardStampBean(StandardStamp.notapproved, 'ic_stamp_not_app_roved.png'),
  StandardStampBean(StandardStamp.draft, 'ic_stamp_draft.png'),
  StandardStampBean(StandardStamp.FINAL, 'ic_stamp_final.png'),
  StandardStampBean(StandardStamp.completed, 'ic_stamp_complete.png'),
  StandardStampBean(StandardStamp.confidential, 'ic_stamp_confidential.png'),
  StandardStampBean(
      StandardStamp.forpublicrelease, 'ic_stamp_for_public_release.png'),
  StandardStampBean(
      StandardStamp.notforpublicrelease, 'ic_stamp_not_for_public_release.png'),
  StandardStampBean(StandardStamp.forcomment, 'ic_stamp_for_comment.png'),
  StandardStampBean(StandardStamp.VOID, 'ic_stamp_void.png'),
  StandardStampBean(
      StandardStamp.preliminaryresults, 'ic_stamp_preliminary_results.png'),
  StandardStampBean(
      StandardStamp.informationonly, 'ic_stamp_information_only.png'),
  StandardStampBean(StandardStamp.witness, 'ic_stamp_witness.png'),
  StandardStampBean(StandardStamp.initialhere, 'ic_stamp_initial_here.png'),
  StandardStampBean(StandardStamp.signhere, 'ic_stamp_sign_here.png'),
  StandardStampBean(StandardStamp.revised, 'ic_stamp_revised.png'),
  StandardStampBean(StandardStamp.accepted, 'ic_stamp_accepted.png'),
  StandardStampBean(StandardStamp.rejected, 'ic_stamp_rejected.png'),
  StandardStampBean(
      StandardStamp.privateaccepted, 'ic_stamp_private_mark_1.png'),
  StandardStampBean(
      StandardStamp.privaterejected, 'ic_stamp_private_mark_2.png'),
  StandardStampBean(
      StandardStamp.privateradiomark, 'ic_stamp_private_mark_3.png'),
];

typedef AttrStampCallback = Function(
    String? standardStampName, TextStampBean? textStampBean);

class AttrStampWidget extends StatefulWidget {
  AttrStampCallback callback;

  AttrStampWidget({Key? key, required this.callback}) : super(key: key);

  @override
  State<AttrStampWidget> createState() => _AttrStampWidgetState();
}

class _AttrStampWidgetState extends State<AttrStampWidget>
    with AutomaticKeepAliveClientMixin, TickerProviderStateMixin {
  List<Tab> tabs = [const Tab(text: 'STANDARD'), const Tab(text: 'CUSTOM')];
  List<TextStampBean> _customTextStampList = [];
  late TabController _tabController;

  bool _isEditMode = false;
  int _selectIndex = 0;

  @override
  void initState() {
    super.initState();
    _tabController = TabController(length: tabs.length, vsync: this);
    _tabController.addListener(() {
      setState(() {
        _selectIndex = _tabController.index;
      });
    });
    _refreshCustomStampList();
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
        appBar: AppBar(
          actions: [
            if (_selectIndex == 1) ...{
              IconButton(
                  onPressed: () async {
                    if (_isEditMode) {
                      List<TextStampBean> selectList = _customTextStampList.where((element) => element.select).toList();
                      await StampUtil.deleteTextStamp(selectList);
                      _refreshCustomStampList();
                    }
                    setState(() {
                      _isEditMode = !_isEditMode;
                    });
                  },
                  icon: Icon(_isEditMode ? Icons.delete : Icons.edit))
            }
          ],
        ),
        body: Column(
          children: [
            TabBar(
              tabs: tabs,
              controller: _tabController,
              indicatorWeight: 2.0,
              unselectedLabelColor: Colors.grey,
              labelColor: Colors.blue,
            ),
            Expanded(
                child: TabBarView(
              controller: _tabController,
              children: [_standardStampList(), _customStampWidgetList()],
            ))
          ],
        ));
  }

  @override
  bool get wantKeepAlive => true;

  Widget _standardStampList() {
    return GridView.builder(
        itemCount: standardStampList.length,
        gridDelegate: const SliverGridDelegateWithFixedCrossAxisCount(
            crossAxisCount: 2, childAspectRatio: 2.2),
        itemBuilder: (BuildContext context, int index) {
          StandardStampBean bean = standardStampList[index];
          return InkWell(
            child: Padding(
              padding: const EdgeInsets.all(16),
              child: Image.asset(bean.getImagePath()),
            ),
            onTap: () {
              widget.callback(bean.standardStamp.name, null);
            },
          );
        });
  }

  Widget _customStampWidgetList() {
    return Stack(
      children: [
        GridView.builder(
            itemCount: _customTextStampList.length,
            gridDelegate: const SliverGridDelegateWithFixedCrossAxisCount(
                crossAxisCount: 2, childAspectRatio: 2.2),
            itemBuilder: (BuildContext context, int index) {
              TextStampBean bean = _customTextStampList[index];
              return Stack(
                children: [
                  InkWell(
                    child: Padding(
                      padding: const EdgeInsets.all(16),
                      child: bean.previewImagePath?.isNotEmpty == true
                          ? Image.file(File(bean.previewImagePath!))
                          : Container(),
                    ),
                    onTap: () {
                      widget.callback(null, _customTextStampList[index]);
                    },
                  ),
                  if (_isEditMode) ...{
                    Positioned(
                        top: 0,
                        right: 0,
                        child: Checkbox(
                            value: bean.select,
                            onChanged: (value) {
                              setState(() {
                                bean.select = value!;
                              });
                            }))
                  }
                ],
              );
            }),
        Positioned(
            bottom: 20,
            right: 20,
            child: FloatingActionButton(
              onPressed: () async {
                await Navigator.push(context,
                    MaterialPageRoute(builder: (BuildContext context) {
                  return const AttrCustomStampEditWidget();
                }));
                _refreshCustomStampList();
              },
              child: const Icon(Icons.add),
            ))
      ],
    );
  }

  void _refreshCustomStampList() async {
    List<TextStampBean> customStampList =
        await StampUtil.getCustomTextStampList();
    setState(() {
      _customTextStampList = customStampList;
    });
  }
}