CS001305-3_APP-CARDS_STARTER

lib/pdfviewer/pdfviewer.dart

@@ -0,0 +1,31 @@
+import 'package:advance_pdf_viewer/advance_pdf_viewer.dart';
+import 'package:decpisos/pdfviewer/pdfviewer_controller.dart';
+import 'package:flutter/material.dart';
+import 'package:get/get.dart';
+
+class PDFViewerScreen extends StatelessWidget {
+  final PDFViewerScreenController c = Get.put(PDFViewerScreenController());
+  @override
+  Widget build(BuildContext context) {
+    return Scaffold(
+      appBar: AppBar(
+        title: Text('DecCard'),
+        centerTitle: false,
+        leading: Container(),
+        leadingWidth: 0,
+        actions: [
+          Obx(() => c.loadPDF.value ? Center(child: CircularProgressIndicator()) : IconButton(icon: Icon(Icons.share), onPressed: c.sharePDF)),
+          Obx(() => c.visibleRefresh.value ? IconButton(icon: Icon(Icons.refresh), onPressed: c.refreshPDF) : Container())
+        ],
+      ),
+      body: Obx(() => c.loading.value
+          ? Center(
+              child: CircularProgressIndicator(),
+            )
+          : c.error.value ? c.buildError() : PDFViewer(
+              lazyLoad: false,
+              document: c.doc,
+            )),
+    );
+  }
+}

lib/pdfviewer/pdfviewer_controller.dart

@@ -0,0 +1,106 @@
+import 'dart:io';
+import 'package:flutter/foundation.dart';
+
+import 'package:advance_pdf_viewer/advance_pdf_viewer.dart';
+import 'package:decpisos/funcoes_gerais.dart';
+import 'package:flutter/material.dart';
+import 'package:get/get.dart';
+import 'package:path_provider/path_provider.dart';
+import 'package:share/share.dart';
+
+class PDFViewerScreenController extends GetxController{
+  var loading = true.obs;
+  var loadPDF = false.obs;
+  var visibleRefresh = false.obs;
+  var error = false.obs;
+  PDFDocument doc;
+  File _filePDF;
+
+  @override
+  void onInit() {
+    super.onInit();
+    this._loadPDF();
+  }
+
+  Future<void> _loadPDF() async {
+    var file = await this._createFileOfPdfUrl();
+    if(file != null && await file.exists()){
+      this.doc = await PDFDocument.fromFile(file);
+      //this.visibleRefresh.value = true;
+    } 
+    else{
+      if(await FuncoesGerais.checkInternetConnection() == false){
+        this.error.value = true;
+      }
+      else{
+        this.doc = await PDFDocument.fromURL(FuncoesGerais.urlPDF);
+      }
+      
+    }  
+    
+    this.loading.value = false;
+  }
+
+  Future<void> refreshPDF() async {
+    this.loading.value = true;
+    try {
+      await this._filePDF.delete();
+      this._loadPDF();
+    } catch (e) {
+      Get.rawSnackbar(message: 'Não possível atualizar o PDF. Tente novamente');
+      this.loading.value = false;
+    }
+  }
+
+  Future<void> sharePDF() async {
+    //Share.shareFiles(['${directory.path}/image.jpg'], text: 'Great picture');
+    this.loadPDF.value = true;
+    var file = await this._createFileOfPdfUrl();
+    try {
+      Share.shareFiles([file.path], text: 'DecCard').then((value) => this.loadPDF.value = false);      
+    } catch (e) {
+      this.loadPDF.value = false;
+      Get.rawSnackbar(message: 'Não foi possível compartilhar o PDF');
+    }
+    
+  }  
+
+  Future<File> _createFileOfPdfUrl() async {
+    final url = FuncoesGerais.urlPDF;
+    File file;
+    
+    final filename = url.substring(url.lastIndexOf("/") + 1);
+    String dir = (await getApplicationDocumentsDirectory()).path;
+    file = new File('$dir/$filename');
+    if(!await file.exists()){
+      if(await FuncoesGerais.checkInternetConnection()){    
+        var request = await HttpClient().getUrl(Uri.parse(url));
+        var response = await request.close();
+        var bytes = await consolidateHttpClientResponseBytes(response);
+        await file.writeAsBytes(bytes);
+      }
+      else{
+        file = null;
+      }      
+    }
+    this._filePDF = file;
+    if(this._filePDF != null) this.visibleRefresh.value = await this._filePDF.exists();
+
+    return file;
+  }  
+
+  Widget buildError(){
+    return Container(
+      width: double.maxFinite,
+      child: Column(
+        mainAxisAlignment: MainAxisAlignment.center,
+        crossAxisAlignment: CrossAxisAlignment.center,
+        children: [
+          Text('Não foi possível carregar o PDF'),
+          SizedBox(height: 10.0,),
+          RaisedButton(onPressed: this.refreshPDF,child: Text('Atualizar'),)
+        ],
+      ),
+    );
+  }
+}