kmpdfkit_demo/lib/widgets/function/pdf_buttom_annot_fun_widget.dart

import 'package:flutter/material.dart';
import 'package:flutter_svg/flutter_svg.dart';
import 'package:kmpdfkit_demo/widgets/constains.dart';
import 'package:kmpdfkit_demo/widgets/events.dart';
import 'package:kmpdfkit_demo/widgets/function/annot_color_options_widget.dart';
import 'package:kmpdfkit_demo/widgets/models/annot_attribute_bean.dart';
import 'package:kmpdfkit_demo/widgets/models/annot_bean.dart';

class PDFButtonAnnotFunWidget extends StatefulWidget {
  const PDFButtonAnnotFunWidget({Key? key}) : super(key: key);

  @override
  State<PDFButtonAnnotFunWidget> createState() =>
      _PDFButtonAnnotFunWidgetState();
}

class _PDFButtonAnnotFunWidgetState extends State<PDFButtonAnnotFunWidget> {
  AnnotType selectAnnot = AnnotType.highlight;

  var annotFunList = [
    AnnotBean(
        annotType: AnnotType.highlight,
        normalImagePath: 'assets/images/ic_reader_highlight.svg',
        selectImagePath: 'assets/images/ic_reader_highlight_select.svg',
        annotColor: Colors.red.value,
        annotColorAlpha: 255),
    AnnotBean(
        annotType: AnnotType.underline,
        normalImagePath: 'assets/images/ic_reader_underline.svg',
        selectImagePath: 'assets/images/ic_reader_underline_select.svg',
        annotColor: Colors.blue.value,
        annotColorAlpha: 255),
    AnnotBean(
        annotType: AnnotType.strikeout,
        normalImagePath: 'assets/images/ic_reader_strikethrough.svg',
        selectImagePath: 'assets/images/ic_reader_strikethrough_select.svg',
        annotColor: Colors.green.value,
        annotColorAlpha: 255),
    AnnotBean(
        annotType: AnnotType.squiggly,
        normalImagePath: 'assets/images/ic_reader_squiggly_underline.svg',
        selectImagePath:
            'assets/images/ic_reader_squiggly_underline_select.svg',
        annotColor: Colors.pink.value,
        annotColorAlpha: 255),
  ];

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

  @override
  Widget build(BuildContext context) {
    return annotList(selectAnnot, (annotBean) {
      selectAnnotType(annotBean.annotType);
    }, (annotBean) {
      selectAnnotType(annotBean.annotType);
      _showColorOptionsModalBottomSheet(context, annotBean);
    });
  }

  void selectAnnotType(AnnotType type) {
    setState(() {
      selectAnnot = type;
    });
  }

  Widget annotList(
      AnnotType selectAnnotType,
      Function(AnnotBean annotBean) onTap,
      Function(AnnotBean annotBean) onLongPress) {
    return Container(
        color: const Color(0xFFEFF4FD),
        height: 60,
        alignment: Alignment.centerLeft,
        child: ListView.builder(
            itemCount: annotFunList.length,
            scrollDirection: Axis.horizontal,
            primary: true,
            shrinkWrap: true,
            itemBuilder: (context, index) {
              AnnotBean bean = annotFunList[index];
              return Container(
                width: 60,
                padding: const EdgeInsets.all(16),
                height: 60,
                color: selectAnnotType == bean.annotType
                    ? const Color(0xFFD5E3FE)
                    : Colors.transparent,
                child: InkWell(
                  onTap: () {
                    onTap(bean);
                  },
                  onLongPress: () {
                    onLongPress(bean);
                  },
                  child: Stack(
                    children: [
                      Positioned(
                        top: 0,
                        bottom: 0,
                        left: 0,
                        right: 0,
                        child: Container(
                          margin: const EdgeInsets.all(2),
                          color: Color(bean.annotColor),
                          width: double.infinity,
                          height: double.infinity,
                        ),
                      ),
                      Positioned(
                          top: 0,
                          bottom: 0,
                          left: 0,
                          right: 0,
                          child: SvgPicture.asset(
                            selectAnnotType == bean.annotType
                                ? bean.selectImagePath
                                : bean.normalImagePath,
                            semanticsLabel: bean.annotType.name,
                          ))
                    ],
                  ),
                ),
              );
            }));
  }

  void _showColorOptionsModalBottomSheet(context, AnnotBean annotBean) {
    showModalBottomSheet<int>(
        context: context,
        isScrollControlled: false,
        builder: (BuildContext context) {
          return AnnotColorOptionsWidget(
            color: annotBean.annotColor,
            alpha: annotBean.annotColorAlpha,
            colorOptionsCallback: (int? color, int? alpha) async {
              AnnotAttributeBean attr = await setAnnotAttribute(
                  annotType: annotBean.annotType, color: color, alpha: alpha);
              AnnotBean bean = annotFunList.firstWhere(
                  (element) => element.annotType == annotBean.annotType);
              setState(() {
                if (color != null) {
                  bean.annotColor = attr.color;
                }
                if (alpha != null) {
                  bean.annotColorAlpha = attr.alpha;
                }
              });
            },
          );
        });
  }

  void initAnnotAttr() async {
    AnnotAttributeBean highlight = await getAnnotAttribute(AnnotType.highlight);
    AnnotAttributeBean underline = await getAnnotAttribute(AnnotType.underline);
    AnnotAttributeBean strikeout = await getAnnotAttribute(AnnotType.strikeout);
    AnnotAttributeBean squiggly = await getAnnotAttribute(AnnotType.squiggly);
    setState(() {
      annotFunList.forEach((element) {
        switch (element.annotType) {
          case AnnotType.highlight:
            element
              ..annotColor = highlight.color
              ..annotColorAlpha = highlight.alpha;
            break;
          case AnnotType.underline:
            element
              ..annotColor = underline.color
              ..annotColorAlpha = underline.alpha;
            break;
          case AnnotType.strikeout:
            element
              ..annotColor = strikeout.color
              ..annotColorAlpha = strikeout.alpha;
            break;
          case AnnotType.squiggly:
            element
              ..annotColor = squiggly.color
              ..annotColorAlpha = squiggly.alpha;
            break;
        }
      });
    });
  }
}