app/lib/constants/constants.dart

/*
 * ====================================================
 * package   : constants
 * author    : Created by nansi.
 * time      : 2019/5/6  9:12 AM 
 * remark    : 
 * ====================================================
 */

import 'dart:ui';
import 'package:flutter/material.dart';

import 'package:flutter_screenutil/flutter_screenutil.dart';

class Constants {
  Constants.initial(BuildContext context) {
    DeviceInfo.initial();
    ScreenAdapterUtils.initial(context);
  }
}

// 屏幕适配
class ScreenAdapterUtils {
  static initial(BuildContext context) {
    ScreenUtil.instance = ScreenUtil(width: 750, height: 1334)..init(context);
  }

  static double setWidth(double width) {
    return ScreenUtil.getInstance().setWidth(width * 2);
  }

  static double setHeight(double height) {
    return ScreenUtil.getInstance().setHeight(height * 2);
  }

  static double setSp(double font) {
    return ScreenUtil.getInstance().setSp(font * 2);
  }
}

//DESIGN CONSTANT

///DESIGN WIDTH
double rSize(double size) {
  return ScreenAdapterUtils.setWidth(size);
}

///DESIGN SP
double rSP(double size) {
  return ScreenAdapterUtils.setSp(size);
}

/// DESIGN SizedBox with width
Widget rWBox(double size) {
  return SizedBox(width: ScreenAdapterUtils.setWidth(size));
}

/// DESIGN SizedBox with height
Widget rHBox(double size) {
  return SizedBox(height: ScreenAdapterUtils.setWidth(size));
}

class AppStrings {
  static const String key_user = "user_json_save";

  static const String key_province_city_json = "province_city_json";
}

class AppPaths {
  static const String path_province_city_json = "/provinceCityJson.json";
}

class DeviceInfo {
  static double screenHeight;
  static double screenWidth;
  static double statusBarHeight;
  static double bottomBarHeight;
  static double devicePixelRatio;
  static double appBarHeight = 56;

  DeviceInfo.initial() {
    MediaQueryData data = MediaQueryData.fromWindow(window);
    screenHeight = data.size.height;
    screenWidth = data.size.width;
    statusBarHeight = data.padding.top;
    bottomBarHeight = data.padding.bottom;
    devicePixelRatio = data.devicePixelRatio;
  }
}