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Flutter – How to over values in searchField

I am new in flutter and have a question.
I have a SEARCHFIELD, and I want it to be possible to go over the list with the mouse to grab the value that I am currently standing on without actually selecting it.

How to do that?…..

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2

Answers


  1. 0

    To achieve this, you will need to make use of Flutter’s gesture detector mechanisms, specifically the onHover event.

    Here is a simplified version of how you could you do this:

    // A list of strings for demonstration. 

    final items = ['Item 1', 'Item 2', 'Item 3'];
    
    ListView.builder(
      itemCount: items.length,
      itemBuilder: (context, index) {
        return MouseRegion(
          onHover: (event) {
            print('Hovering over: ${items[index]}');
            // You can use setState() to change the value of a variable that reflects the current hovered item. 
          },
          child: ListTile(
            title: Text(items[index]),
          ),
        );
      },
    );
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  2. 0

    To achieve the behavior you’re describing in Flutter, where you can hover over items in a list to grab their values without selecting them, you can use a combination of a ListView for displaying the list and mouse region widgets like MouseRegion to detect hover events. Below is a simple example of how you can implement this:

    Create a List of Items: This will be your data source for the ListView.
    Use ListView.builder: This widget will help you build a list item dynamically based on the list data.
    Wrap Each Item in a MouseRegion: This widget will allow you to detect when the mouse hovers over an item.
    Display Hovered Value: Use a stateful widget to update and display the value of the currently hovered item.

    import 'package:flutter/material.dart';

void main() {
  runApp(MyApp());
}

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Hover Demo',
      home: HoverList(),
    );
  }
}

class HoverList extends StatefulWidget {
  @override
  _HoverListState createState() => _HoverListState();
}

class _HoverListState extends State<HoverList> {
  String hoveredItem = '';

  @override
  Widget build(BuildContext context) {
    List<String> items = List.generate(10, (index) => 'Item ${index + 1}');
    return Scaffold(
      appBar: AppBar(
        title: Text('Hover to Preview Item'),
      ),
      body: Column(
        children: [
          Expanded(
            child: ListView.builder(
              itemCount: items.length,
              itemBuilder: (context, index) {
                return MouseRegion(
                  onEnter: (event) => setState(() {
                    hoveredItem = items[index];
                  }),
                  onExit: (event) => setState(() {
                    hoveredItem = '';
                  }),
                  child: ListTile(
                    title: Text(items[index]),
                  ),
                );
              },
            ),
          ),
          Padding(
            padding: const EdgeInsets.all(8.0),
            child: Text('Hovered Item: $hoveredItem'),
          ),
        ],
      ),
    );
  }
}

    MouseRegion Widget: onEnter is triggered when the mouse pointer enters the widget, and onExit is triggered when the mouse leaves the widget. These callbacks update the state with the value of the item being hovered over.

    ListTile: This is a simple widget that represents each item in the list.

    Hovered Item Display: The hovered item’s value is displayed at the bottom of the screen.

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