kmpdfkit_demo/lib/widgets/function/attrwidget/base_slider_widget.dart

import 'package:flutter/material.dart';

///  annot_attribute_options_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.

typedef AnnotSliderValueOptionsCallback = void Function(double value);

enum ValueShowType { sourceValue, percentage }

class BaseSliderWidget extends StatefulWidget {
  final double sliderCurrentValue;
  final double sliderMaxValue;
  final double sliderMinValue;
  final IconData icon;
  final ValueShowType valueShowType;
  final String valueText;
  final AnnotSliderValueOptionsCallback sliderValueCallback;

  const BaseSliderWidget(
      {Key? key,
      required this.sliderCurrentValue,
      required this.sliderMinValue,
      required this.sliderMaxValue,
      required this.icon,
        this.valueText = "",
      this.valueShowType = ValueShowType.percentage,
      required this.sliderValueCallback})
      : super(key: key);

  @override
  State<BaseSliderWidget> createState() => _BaseSliderWidgetState();
}

class _BaseSliderWidgetState extends State<BaseSliderWidget> {
  late double currentSliderValue = 0.0;

  @override
  void initState() {
    super.initState();
    currentSliderValue = widget.sliderCurrentValue.toDouble();
  }

  @override
  Widget build(BuildContext context) {
    return Padding(
        padding: const EdgeInsets.symmetric(horizontal: 8),
        child: Row(
          crossAxisAlignment: CrossAxisAlignment.center,
          children: [
            Icon(widget.icon),
            Expanded(
                child: Slider(
              min: widget.sliderMinValue,
              max: widget.sliderMaxValue,
              value: currentSliderValue,
              onChanged: (data) {
                setState(() {
                  currentSliderValue = data;
                  widget.sliderValueCallback(currentSliderValue.roundToDouble());
                });
              }
            )),
            if(widget.valueText.isEmpty) ...[
              Container(
                width: 50,
                child: Text(widget.valueShowType == ValueShowType.percentage
                    ? '${((currentSliderValue / widget.sliderMaxValue) * 100).round()}%'
                    : currentSliderValue.round().toString()),
              )
            ]else ...[
              Container(
                width: 50,
                child: Text(widget.valueText),
              )
            ]
          ],
        ));
  }
}


Widget colorAlphaWidget({int currentAlphaValue = 0, double sliderMaxValue = 255, required AnnotSliderValueOptionsCallback alphaOptionsCallback}){
  return BaseSliderWidget(sliderCurrentValue: currentAlphaValue.toDouble(),sliderMinValue: 0, sliderMaxValue: sliderMaxValue, icon:  Icons.invert_colors, sliderValueCallback: alphaOptionsCallback);
}