Multiple dialogs on multiple Routes

[richardkrieger]

Working example for problem:

    import 'package:flutter/material.dart';
    import 'package:progress_dialog/progress_dialog.dart';
    
    void main() => runApp(MyApp());
    
    class MyApp extends StatelessWidget {
    
        @override
        Widget build(BuildContext context) {
            return MaterialApp(
                    title: 'Flutter Demo',
                    theme: ThemeData(
                        primarySwatch: Colors.blue,
                    ),
                    home: ParentWidget()
            );
        }
    }
    
    class ParentWidget extends StatelessWidget {
        @override
        Widget build(BuildContext context) {
            return Column(
                mainAxisAlignment: MainAxisAlignment.center,
                crossAxisAlignment: CrossAxisAlignment.center,
                children: <Widget>[
                    Text("PatentWidget"),
                    RaisedButton(
                        child: Text("start child 1"),
                        onPressed: () async{
                            ProgressDialog progressDialog = ProgressDialog(
                                context,
                                type: ProgressDialogType.Normal,
                                isDismissible: true,
                            );
                            progressDialog.show();
                            await new Future.delayed(const Duration(seconds : 1)); // simulate loading
                await Navigator.push(
                    context, MaterialPageRoute <dynamic>(
                        builder: (context) => Child1Widget()
                  )
                );
                progressDialog.hide();
              }
                    ),
    
                ],
            );
        }
    }
    
    class Child1Widget extends StatelessWidget {
        @override
        Widget build(BuildContext context) {
            return Column(
                mainAxisAlignment: MainAxisAlignment.center,
                crossAxisAlignment: CrossAxisAlignment.center,
                children: <Widget>[
                    Text("Child1Widget"),
                    RaisedButton(
                        child: Text("start child 2"),
                        onPressed: () async{
                            ProgressDialog progressDialog = ProgressDialog(
                                context,
                                type: ProgressDialogType.Normal,
                                isDismissible: true,
                            );
                            progressDialog.show();
                            await new Future.delayed(const Duration(seconds : 1)); // simulate loading
                            await Navigator.push(
                                    context, MaterialPageRoute <dynamic>(
                                        builder: (context) => Child2Widget()
                                )
                            );
                            progressDialog.hide();
                        },
                    ),
                    RaisedButton(
                            child: Text("back to parent"),
                            onPressed: () {
                                Navigator.of(context).pop();
                            }
                    )
                ],
            );
        }
    }
    
    class Child2Widget extends StatelessWidget {
        @override
        Widget build(BuildContext context) {
            return Column(
            mainAxisAlignment: MainAxisAlignment.center,
            crossAxisAlignment: CrossAxisAlignment.center,
                children: <Widget>[
                    Text("Child2Widget"),
                    RaisedButton(
                            child: Text("back to child 1"),
                            onPressed: () {
                                Navigator.of(context).pop();
                            }
                    )
                ],
            );
        }
    }

ParentWidget -> Child1Widget and back works properly

ParentWidget -> Child1Widget -> Child2Widget:

1. Child1Widget -> Child2Widget - no dialog
2. Child2Widget -> Child1Widget -> ParentWidget - dialog on ParentWidget cannot be removed