kmpdfkit_demo/lib/widgets/common/views/pdfview/cpdf_page_indicator.dart

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

import '../dialog/cpdf_base_input_dialog_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.

class CPDFPageIndicator extends StatefulWidget {
  CPDFViewCtrl ctrl;

  CPDFPageIndicator({required this.ctrl, super.key});

  @override
  State<CPDFPageIndicator> createState() => _CPDFPageIndicatorState();
}

class _CPDFPageIndicatorState extends State<CPDFPageIndicator> {
  int _currentPage = 0;

  int _pageCount = 0;

  bool _enterTextIsEmpty = true;

  @override
  void initState() {
    super.initState();
    _initDocumentData();
    setReaderViewCallback();
  }

  void _initDocumentData() async {
    int pageCount = await widget.ctrl.document.getPageCount();
    setState(() {
      _pageCount = pageCount;
    });
  }

  @override
  Widget build(BuildContext context) {
    var textStyle = const TextStyle(color: Colors.white);
    return GestureDetector(
      child: Container(
        decoration: const BoxDecoration(
            color: Color(0xCC000000),
            borderRadius: BorderRadius.all(Radius.circular(2))),
        padding: const EdgeInsets.symmetric(vertical: 4, horizontal: 8),
        child: Row(
          mainAxisAlignment: MainAxisAlignment.center,
          mainAxisSize: MainAxisSize.min,
          children: [
            Text((_currentPage + 1).toString(), style: textStyle),
            Text('/', style: textStyle),
            Text(_pageCount.toString(), style: textStyle)
          ],
        ),
      ),
      onTap: () async {
        int? jumpPageIndex = await showDialog<int?>(
            context: context,
            builder: (BuildContext context) {
              return CPDFPageNavigationWidget(
                pageCount: _pageCount,
                hintText: 'Page (1/$_pageCount)',
              );
            });
        if (jumpPageIndex != null) {
          widget.ctrl.setDisplayPageIndex(jumpPageIndex);
        }
      },
    );
  }

  void setReaderViewCallback() {
    widget.ctrl.setReaderViewCallback(
        onMoveToChild: (pageIndex) {
          setState(() {
            _currentPage = pageIndex;
          });
        },
        onScrollEnd: () {},
        onRecordLastJumpPageNum: (pageIndex) {});
  }
}