Noħolqu Popover b'Arrow in Flutter

Biex toħloq Flutter popup bi vleġġa li tipponta lejn element speċifiku, tista 'tuża l- Popover widget mill- popover pakkett. Hawn kif tista 'tagħmel dan:

Żid il popover -pakkett mal-fajl tiegħek pubspec.yaml:

dependencies:
  flutter:  
    sdk: flutter  
  popover: ^0.5.0  

Importa l-pakketti meħtieġa:

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

Uża l- Popover widget:

void main() {  
  runApp(MyApp());  
}  
  
class MyApp extends StatelessWidget {  
  @override  
  Widget build(BuildContext context) {  
    return MaterialApp(  
      home: MyHomePage(),  
   );  
  }  
}  
  
class MyHomePage extends StatelessWidget {  
  @override  
  Widget build(BuildContext context) {  
    return Scaffold(  
      appBar: AppBar(  
        title: Text('Popover Example'),  
     ),  
      body: Center(  
        child: Popover(  
          child: ElevatedButton(  
            onPressed:() {},  
            child: Text('Open Popup'),  
         ),  
          bodyBuilder:(BuildContext context) {  
            return Container(  
              padding: EdgeInsets.all(10),  
              child: Column(  
                mainAxisSize: MainAxisSize.min,  
                children: [  
                  Text('This is a popover with an arrow.'),  
                  SizedBox(height: 10),  
                  Icon(Icons.arrow_drop_up, color: Colors.grey),  
                ],  
             ),  
           );  
          },  
       ),  
     ),  
   );  
  }  
}  

F'dan l-eżempju, il- Popover widget jintuża biex jinħoloq popover bi vleġġa li tipponta mill-buttuna lejn il-kontenut. Il- child proprjetà hija l-element li jqanqal il-popover, u l- bodyBuilder proprjetà hija callback li tirritorna l-kontenut tal-popover.

Ftakar li tippersonalizza l-kontenut, id-dehra, u l-imġieba tal-popover skont il-ħtiġijiet tiegħek. Dan l-eżempju juri l-użu tal- popover pakkett biex jinħolqu popovers bi vleġeġ fi Flutter.