NEW

Author: PythonnotJava

src/pkg/flutter_wordclould/example/img/1766496638.png

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+import 'dart:typed_data';
+import 'dart:io';
+
+import 'package:flutter/material.dart';
+import 'package:path_provider/path_provider.dart';
+
+import 'package:flutter_wordcloud/flutter_wordcloud.dart';
+
+// 键值对数据
+final jourData = {
+  "JOURNAL OF CLEANER PRODUCTION": 47,
+  "SUSTAINABILITY": 32,
+  "SCIENCE OF THE TOTAL ENVIRONMENT": 28,
+  "AMA-AGRICULTURAL MECHANIZATION IN ASIA AFRICA AND LATIN AMERICA": 19,
+  "ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH": 17,
+  "JOURNAL OF ENVIRONMENTAL MANAGEMENT": 16,
+  "AGRICULTURE ECOSYSTEMS & ENVIRONMENT": 15,
+  "AGRONOMY-BASEL": 12,
+  "SCIENTIFIC REPORTS": 11,
+  "AGRICULTURE-BASEL": 10,
+  "ENVIRONMENTAL RESEARCH LETTERS": 10,
+  "SOIL & TILLAGE RESEARCH": 8,
+  "GLOBAL CHANGE BIOLOGY": 8,
+  "AGRICULTURAL SYSTEMS": 7,
+  "GEODERMA": 7,
+  "FRONTIERS IN ENVIRONMENTAL SCIENCE": 7,
+  "BIOGEOSCIENCES": 7,
+  "ECOLOGICAL INDICATORS": 6,
+  "INTERNATIONAL JOURNAL OF LIFE CYCLE ASSESSMENT": 6,
+  "ATMOSPHERIC CHEMISTRY AND PHYSICS": 6,
+  "FRONTIERS IN SUSTAINABLE FOOD SYSTEMS": 5,
+  "ATMOSPHERIC ENVIRONMENT": 5,
+  "SOIL BIOLOGY & BIOCHEMISTRY": 5,
+  "MITIGATION AND ADAPTATION STRATEGIES FOR GLOBAL CHANGE": 5,
+  "FIELD CROPS RESEARCH": 5,
+  "SOIL SCIENCE SOCIETY OF AMERICA JOURNAL": 5,
+  "NATURE COMMUNICATIONS": 5,
+  "FRESENIUS ENVIRONMENTAL BULLETIN": 4,
+  "ENVIRONMENT DEVELOPMENT AND SUSTAINABILITY": 4,
+  "NUTRIENT CYCLING IN AGROECOSYSTEMS": 4,
+  "SUSTAINABLE PRODUCTION AND CONSUMPTION": 4,
+  "BIOMASS CONVERSION AND BIOREFINERY": 4,
+  "RENEWABLE & SUSTAINABLE ENERGY REVIEWS": 4,
+  "PLOS ONE": 4,
+  "GLOBAL CHANGE BIOLOGY BIOENERGY": 4,
+  "ENVIRONMENTAL POLLUTION": 4,
+  "REGIONAL ENVIRONMENTAL CHANGE": 4,
+  "FORESTS": 4,
+  "LAND DEGRADATION & DEVELOPMENT": 4,
+  "HELIYON": 3,
+  "ARCHIVES OF AGRONOMY AND SOIL SCIENCE": 3,
+  "ENVIRONMENTAL TECHNOLOGY & INNOVATION": 3,
+  "ANTHROPOCENE": 3,
+  "PLANT AND SOIL": 3,
+  "JOURNAL OF SOILS AND SEDIMENTS": 3,
+  "AGRICULTURAL WATER MANAGEMENT": 3,
+  "JOURNAL OF THE SCIENCE OF FOOD AND AGRICULTURE": 3,
+  "ENERGIES": 3,
+  "PEDOSPHERE": 3,
+  "SOIL USE AND MANAGEMENT": 3,
+  "PLANTS-BASEL": 3,
+  "CANADIAN JOURNAL OF SOIL SCIENCE": 2,
+  "EARTHS FUTURE": 2,
+  "EUROPEAN JOURNAL OF AGRONOMY": 2,
+  "INDUSTRIAL CROPS AND PRODUCTS": 2,
+  "RESOURCES CONSERVATION AND RECYCLING": 2,
+  "COMMUNICATIONS IN SOIL SCIENCE AND PLANT ANALYSIS": 2,
+  "GLOBAL ENVIRONMENTAL CHANGE-HUMAN AND POLICY DIMENSIONS": 2,
+  "APPLIED SCIENCES-BASEL": 2,
+  "APPLIED SOIL ECOLOGY": 2,
+  "EUROPEAN JOURNAL OF SOIL SCIENCE": 2,
+  "JOURNAL OF HYDROLOGY": 2,
+  "CATENA": 2,
+  "JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T": 2,
+  "FOOD POLICY": 2,
+  "JOURNAL OF FOREST ECONOMICS": 2,
+  "ENVIRONMENT INTERNATIONAL": 2,
+  "SOIL SCIENCE AND PLANT NUTRITION": 2,
+  "DESALINATION AND WATER TREATMENT": 2,
+  "ECOLOGICAL ECONOMICS": 2,
+  "INTERNATIONAL JOURNAL OF ENVIRONMENTAL SCIENCE AND TECHNOLOGY": 2,
+  "ENVIRONMENTAL SCIENCE & POLICY": 2,
+  "ACS OMEGA": 2,
+  "INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH": 2,
+  "INTERNATIONAL JOURNAL OF AGRICULTURAL AND BIOLOGICAL ENGINEERING": 2,
+  "FRONTIERS IN PLANT SCIENCE": 2,
+  "PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF": 2,
+  "INTERNATIONAL SOIL AND WATER CONSERVATION RESEARCH": 2,
+  "RANGELAND JOURNAL": 2,
+  "SCIENCE": 2,
+  "GLOBAL BIOGEOCHEMICAL CYCLES": 2,
+  "ENVIRONMENTAL DEVELOPMENT": 2,
+  "ANIMAL PRODUCTION SCIENCE": 2,
+  "FOREST ECOSYSTEMS": 2,
+  "FOREST POLICY AND ECONOMICS": 2,
+  "IFOREST-BIOGEOSCIENCES AND FORESTRY": 2,
+  "AGRONOMY FOR SUSTAINABLE DEVELOPMENT": 2,
+  "FOREST ECOLOGY AND MANAGEMENT": 2,
+  "BIOENERGY RESEARCH": 2,
+  "JOURNAL OF ENVIRONMENTAL QUALITY": 2,
+  "INTERNATIONAL JOURNAL OF GREENHOUSE GAS CONTROL": 2,
+  "JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES": 2,
+  "MATERIALS": 1,
+  "IEEE JOURNAL OF SELECTED TOPICS IN APPLIED EARTH OBSERVATIONS AND REMOTE": 1,
+  "PADDY AND WATER ENVIRONMENT": 1,
+  "FRONTIERS IN MICROBIOLOGY": 1,
+  "ENERGY SOURCES PART A-RECOVERY UTILIZATION AND ENVIRONMENTAL EFFECTS": 1,
+  "PROCESSES": 1,
+  "SCIENCE OF ADVANCED MATERIALS": 1,
+  "SUSTAINABLE ENERGY TECHNOLOGIES AND ASSESSMENTS": 1
+};
+final subject = {
+  "Environmental Sciences": 313,
+  "Green & Sustainable Science & Technology": 104,
+  "Soil Science": 70,
+  "Engineering, Environmental": 67,
+  "Agronomy": 60,
+  "Environmental Studies": 50,
+  "Ecology": 45,
+  "Energy & Fuels": 41,
+  "Multidisciplinary Sciences": 35,
+  "Agriculture, Multidisciplinary": 34,
+  "Meteorology & Atmospheric Sciences": 33,
+  "Geosciences, Multidisciplinary": 32,
+  "Plant Sciences": 29,
+  "Agricultural Engineering": 28,
+  "Forestry": 21,
+  "Food Science & Technology": 19,
+  "Biodiversity Conservation": 18,
+  "Water Resources": 18,
+  "Engineering, Chemical": 14,
+  "Economics": 12,
+  "Biotechnology & Applied Microbiology": 11,
+  "Materials Science, Multidisciplinary": 11,
+  "Chemistry, Multidisciplinary": 9,
+  "Chemistry, Analytical": 8,
+  "Chemistry, Applied": 7,
+  "Agricultural Economics & Policy": 6,
+  "Chemistry, Physical": 6,
+  "Public, Environmental & Occupational Health": 5,
+  "Engineering, Electrical & Electronic": 5,
+  "Geography, Physical": 5,
+  "Physics, Applied": 5,
+  "Engineering, Civil": 4,
+  "Agriculture, Dairy & Animal Science": 4,
+  "Metallurgy & Metallurgical Engineering": 4,
+  "Marine & Freshwater Biology": 3,
+  "Thermodynamics": 3,
+  "Remote Sensing": 3,
+  "Imaging Science & Photographic Technology": 3,
+  "Nanoscience & Nanotechnology": 3,
+  "Nutrition & Dietetics": 3,
+  "Biochemistry & Molecular Biology": 2,
+  "Engineering, Multidisciplinary": 2,
+  "Construction & Building Technology": 2,
+  "Instruments & Instrumentation": 2,
+  "Biology": 2,
+  "Fisheries": 2,
+  "Mathematics, Interdisciplinary Applications": 2,
+  "Geography": 2,
+  "Polymer Science": 2,
+  "Mining & Mineral Processing": 2,
+  "Toxicology": 2,
+  "Mathematical & Computational Biology": 1,
+  "Biochemical Research Methods": 1,
+  "Limnology": 1,
+  "Spectroscopy": 1,
+  "Microbiology": 1,
+  "Operations Research & Management Science": 1,
+  "Physics, Condensed Matter": 1,
+  "Physics, Mathematical": 1,
+  "Logic": 1,
+  "Entomology": 1,
+  "Astronomy & Astrophysics": 1,
+  "Materials Science, Ceramics": 1,
+  "Mathematics, Applied": 1,
+  "Chemistry, Inorganic & Nuclear": 1,
+  "Biophysics": 1,
+  "Electrochemistry": 1,
+  "Computer Science, Artificial Intelligence": 1,
+  "Computer Science, Interdisciplinary Applications": 1,
+  "Engineering, Mechanical": 1,
+  "Mechanics": 1,
+  "Automation & Control Systems": 1,
+  "Veterinary Sciences": 1,
+  "Computer Science, Information Systems": 1,
+  "Telecommunications": 1,
+  "Management": 1,
+  "Materials Science, Composites": 1,
+  "Nuclear Science & Technology": 1,
+  "Computer Science, Theory & Methods": 1,
+  "Chemistry, Organic": 1
+};
+final research = {
+  "Agriculture": 186,
+  "Science & Technology - Other Topics": 141,
+  "Engineering": 90,
+  "Environmental Sciences": 49,
+  "Energy & Fuels": 40,
+  "Geology": 31,
+  "Chemistry": 30,
+  "Plant Sciences": 29,
+  "Meteorology & Atmospheric Sciences": 29,
+  "Forestry": 21,
+  "Food Science & Technology": 19,
+  "Biodiversity & Conservation": 18,
+  "Water Resources": 18,
+  "Materials Science": 13,
+  "Business & Economics": 12,
+  "Biotechnology & Applied Microbiology": 11,
+  "Physical Geography": 5,
+  "Physics": 5,
+  "Public, Environmental & Occupational": 4,
+  "Metallurgy & Metallurgical Engineering": 4,
+  "Meteorology & Atmospheric": 4,
+  "Computer Science": 3,
+  "Environmental": 3,
+  "Remote Sensing": 3,
+  "Marine & Freshwater Biology": 3,
+  "Thermodynamics": 3,
+  "Mathematics": 3,
+  "Biochemistry & Molecular Biology": 3,
+  "Fisheries": 2,
+  "Imaging Science &": 2,
+  "Construction & Building Technology": 2,
+  "Toxicology": 2,
+  "Polymer Science": 2,
+  "Geography": 2,
+  "Nutrition": 2,
+  "Instruments & Instrumentation": 2,
+  "Life Sciences & Biomedicine - Other Topics": 2,
+  "Environmental Sciences &": 2,
+  "Mining & Mineral Processing": 2,
+  "Imaging": 1,
+  "Veterinary Sciences": 1,
+  "Spectroscopy": 1,
+  "Public, Environmental & Occupational Health": 1,
+  "Nutrition & Dietetics": 1,
+  "Science & Technology -": 1,
+  "Operations Research & Management Science": 1,
+  "Entomology": 1,
+  "Astronomy & Astrophysics": 1,
+  "Nuclear Science & Technology": 1,
+  "Biophysics": 1,
+  "Mechanics": 1,
+  "Automation & Control Systems": 1,
+  "Telecommunications": 1,
+  "Microbiology": 1,
+  "Mathematical & Computational Biology": 1
+};
+
+// 简单的保持功能
+Future<File> saveUint8ListToDesktop(Uint8List data) async {
+  final String? desktopPath = await getDownloadsDirectory()
+      .then((dir) => dir?.parent.path)
+      .then((parent) => '$parent/Desktop');
+
+  final String desktop = desktopPath ??
+      r'C:\Users\' + Platform.environment['USERNAME']! + r'\Desktop';
+
+  final Directory desktopDir = Directory(desktop);
+  if (!await desktopDir.exists()) {
+    await desktopDir.create(recursive: true);
+  }
+
+  final String fullPath =
+      "$desktop/${DateTime.now().toUtc().millisecondsSinceEpoch ~/ 1000}.png";
+  final File file = File(fullPath);
+  await file.writeAsBytes(data);
+
+  debugPrint('已保存到桌面：$fullPath');
+  return file;
+}
+
+void main() {
+  runApp(const DemoApp());
+}
+
+class DemoApp extends StatelessWidget {
+  const DemoApp({super.key});
+
+  @override
+  Widget build(BuildContext context) {
+    return MaterialApp(
+      home: Scaffold(
+        appBar: AppBar(title: const Text("WordCloud 形状演示")),
+        body: SingleChildScrollView(
+          child: Padding(
+            padding: const EdgeInsets.all(20.0),
+            child: Column(
+              children: [
+                _buildExample(jourData, '期刊统计', GradientTheme.coolGray,
+                    ColorMapTheme.mono, minFontSize: 10),
+                _buildExample(subject, '学科统计', GradientTheme.sunset,
+                    ColorMapTheme.turboColors, minFontSize: 16),
+                _buildExample(research, '研究领域统计', GradientTheme.greenCyan,
+                    ColorMapTheme.scientificColors, minFontSize: 20,),
+              ],
+            ),
+          ),
+        ),
+      ),
+    );
+  }
+
+  Future<void> savePng(WordCloudLogic wc) async {
+    final data = await wc.exportToPngBytes(ratio: 3);
+    await saveUint8ListToDesktop(data);
+  }
+
+  Widget _buildExample(Map<String, int> datas, String title, Gradient gradient,
+      List<Color> colorMap,
+      {Offset? wordSpacing, double? minFontSize, double? maxFontSize}) {
+    final wc = WordCloudLogic(
+      datas,
+      width: 1600,
+      height: 1000,
+      minFontSize: minFontSize ?? 10,
+      maxFontSize: maxFontSize,
+      backgroundGradient: gradient,
+      coloMap: colorMap,
+      wordSpacing: wordSpacing,
+    );
+
+    return Column(
+      children: [
+        Row(
+          children: [
+            Text(
+              title,
+              style: const TextStyle(fontSize: 24, fontWeight: FontWeight.bold),
+            ),
+            IconButton(
+                onPressed: () async => savePng(wc),
+                icon: const Icon(Icons.save))
+          ],
+        ),
+        const SizedBox(height: 15),
+        Container(
+          decoration: BoxDecoration(
+            border: Border.all(color: Colors.grey.shade300, width: 2),
+            borderRadius: BorderRadius.circular(8),
+          ),
+          child: WordCloudView(cloud: wc),
+        ),
+      ],
+    );
+  }
+}