kmpdfkit_demo/lib/tools/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 {
  final CPDFViewCtrl ctrl;

  Decoration? decoration;

  TextStyle? textStyle;

  CPDFPageIndicator(
      {required this.ctrl, this.decoration, this.textStyle, super.key}) {
    decoration ??= const BoxDecoration(
        color: Color(0xCC000000),
        borderRadius: BorderRadius.all(Radius.circular(2)));
    textStyle ??= const TextStyle(color: Colors.white);
  }

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

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

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

  void _initDocumentData() async {
    widget.ctrl.document.getPageCount().then((value) {
      setState(() {
        _pageCount = value;
      });
    });
  }

  @override
  Widget build(BuildContext context) {
    return GestureDetector(
      child: Container(
        decoration: widget.decoration,
        padding: const EdgeInsets.symmetric(vertical: 4, horizontal: 8),
        child: Row(
          mainAxisAlignment: MainAxisAlignment.center,
          mainAxisSize: MainAxisSize.min,
          children: [
            StreamBuilder(
                initialData: 1,
                stream: widget.ctrl.currentPageIndexStream.stream,
                builder: (context, pageIndex) {
                  return Text((pageIndex.data! + 1).toString(),
                      style: widget.textStyle);
                }),
            Text('/', style: widget.textStyle),
            Text(_pageCount.toString(), style: widget.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);
        }
      },
    );
  }
}