kmpdfkit_demo/lib/widgets/viewer/pdfdisplaysettings/cpdf_page_mode_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.

import 'package:compdfkit_flutter/core/cpdf_view_ctrl.dart';
import 'package:flutter/material.dart';

import '../../../common/util/Strings.dart';
import '../../common/radio/cpdf_radio_group_data.dart';
import '../../common/radio/cpdf_radio_list_group.dart';

const singlePage = 0;

const doublePage = 1;

const coverPage = 2;

final pageModes = [
  CPDFRadioGroupData(
      singlePage, 'assets/images/ic_single_page.png', Strings.SinglePage),
  CPDFRadioGroupData(
      doublePage, 'assets/images/ic_double_page.png', Strings.DoublePage),
  CPDFRadioGroupData(
      coverPage, 'assets/images/ic_book_mode.png', Strings.BookMode),
];

class CPDFPageModeWidget extends StatefulWidget {
  final CPDFViewCtrl ctrl;

  const CPDFPageModeWidget({Key? key, required this.ctrl}) : super(key: key);

  @override
  State<CPDFPageModeWidget> createState() => _CPDFPageModeWidgetState();
}

class _CPDFPageModeWidgetState extends State<CPDFPageModeWidget> {
  // 0:single page、 1: double page、 2： book mode
  int _pageMode = -1;

  @override
  void initState() {
    super.initState();
    _initDisplaySettings();
  }

  void _initDisplaySettings() async {
    CPDFViewCtrl ctrl = widget.ctrl;
    bool isDoublePage = await ctrl.isDoublePageMode();
    bool isCoverPage = await ctrl.isCoverPageMode();
    setState(() {
      if (isDoublePage) {
        if (isCoverPage) {
          _pageMode = coverPage;
        } else {
          _pageMode = doublePage;
        }
      } else {
        _pageMode = singlePage;
      }
    });
  }

  @override
  Widget build(BuildContext context) {
    return Column(
      children: [
        _title(context, ''),
        CPDFRadioListGroup(
          iconColor: Theme.of(context).brightness == Brightness.dark
              ? Colors.white
              : null,
          checkId: _pageMode,
          list: pageModes,
          onChecked: (checkId) {
            setState(() {
              _pageMode = checkId;
              switch (checkId) {
                case doublePage:
                  widget.ctrl.setDoublePageMode(true);
                  widget.ctrl.setCoverPageMode(false);
                  break;
                case coverPage:
                  widget.ctrl.setDoublePageMode(true);
                  widget.ctrl.setCoverPageMode(true);
                  break;
                default:
                  widget.ctrl.setDoublePageMode(false);
                  widget.ctrl.setCoverPageMode(false);
                  break;
              }
            });
          },
        )
      ],
    );
  }

  Widget _title(BuildContext context, String title) {
    return Container(
      alignment: Alignment.centerLeft,
      height: 28,
      padding: const EdgeInsets.symmetric(horizontal: 16),
      color: Theme.of(context).colorScheme.secondaryContainer,
      child: Text(
        title,
        style: Theme.of(context).textTheme.labelMedium,
      ),
    );
  }
}