### NumberPickerDialog Usage Example

Source: https://github.com/andrezanna/numberpicker/blob/master/README.md

Shows how to display a decimal NumberPickerDialog using showDialog and update the UI state with the selected value. Includes a FloatingActionButton to trigger the dialog.

```dart
class _MyHomePageState extends State<MyHomePage> {
  double _currentPrice = 1.0;

  _showDialog() {
    showDialog(
 		  context: context,
 		  child: new NumberPickerDialog.decimal(
 				  minValue: 1,
 				  maxValue: 10,
 				  title: new Text("Pick a new price"),
 				  initialDoubleValue: _currentPrice),
 		).then((value) {
      if (value != null) {
        setState(() => _currentPrice = value);
      }
    });
  }

  @override
  Widget build(BuildContext context) {
    return new Scaffold(
      body: new Center(
        child: new Text("Current price: $_currentPrice "),
      ),
      appBar: new AppBar(
        title: new Text(widget.title),
      ),
      floatingActionButton: new FloatingActionButton(
        child: new Icon(Icons.attach_money),
        onPressed: _showDialog,
      ),
    );
  }
}
```

--------------------------------

### Decimal NumberPickerDialog Example

Source: https://context7.com/andrezanna/numberpicker/llms.txt

Shows how to use NumberPickerDialog.decimal for selecting a price with a specified number of decimal places. It returns the selected double or null if cancelled. The 'numberpicker' package must be imported.

```dart
import 'package:flutter/material.dart';
import 'package:numberpicker/numberpicker.dart';

class DecimalDialogExample extends StatefulWidget {
  @override
  _DecimalDialogExampleState createState() => _DecimalDialogExampleState();
}

class _DecimalDialogExampleState extends State<DecimalDialogExample> {
  double _currentPrice = 1.0;

  _showPriceDialog() {
    showDialog(
      context: context,
      child: NumberPickerDialog.decimal(
        minValue: 1,
        maxValue: 10,
        initialDoubleValue: _currentPrice,
        decimalPlaces: 2,
        title: Text("Pick a new price"),
      ),
    ).then((value) {
      if (value != null) {
        setState(() => _currentPrice = value);
      }
    });
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(title: Text('Price Selector')),
      body: Center(
        child: Text("Current price: $${_currentPrice.toStringAsFixed(2)}"),
      ),
      floatingActionButton: FloatingActionButton(
        child: Icon(Icons.attach_money),
        onPressed: _showPriceDialog,
      ),
    );
  }
}
```

--------------------------------

### Integer NumberPickerDialog Example

Source: https://context7.com/andrezanna/numberpicker/llms.txt

Demonstrates how to use NumberPickerDialog.integer to create a dialog for selecting an age. It returns the selected integer or null if cancelled. Ensure the 'numberpicker' package is imported.

```dart
import 'dart:async';
import 'package:flutter/material.dart';
import 'package:numberpicker/numberpicker.dart';

class IntegerDialogExample extends StatefulWidget {
  @override
  _IntegerDialogExampleState createState() => _IntegerDialogExampleState();
}

class _IntegerDialogExampleState extends State<IntegerDialogExample> {
  int _currentAge = 25;

  Future _showAgeDialog() async {
    await showDialog(
      context: context,
      child: NumberPickerDialog.integer(
        minValue: 0,
        maxValue: 120,
        initialIntegerValue: _currentAge,
        title: Text("Select your age"),
      ),
    ).then((value) {
      if (value != null) {
        setState(() => _currentAge = value);
      }
    });
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(title: Text('Age Selector')),
      body: Center(
        child: Text("Current age: $_currentAge"),
      ),
      floatingActionButton: FloatingActionButton(
        child: Icon(Icons.edit),
        onPressed: _showAgeDialog,
      ),
    );
  }
}
```

--------------------------------

### Standalone NumberPicker Widget Example

Source: https://github.com/andrezanna/numberpicker/blob/master/README.md

Demonstrates integrating an integer NumberPicker widget within a Flutter Scaffold's body. Updates a Text widget and the internal state upon value change.

```dart
class _MyHomePageState extends State<MyHomePage> {
  int _currentValue = 1;

  @override
  Widget build(BuildContext context) {
    return new Scaffold(
      body: new Center(
        child: new Column(
          mainAxisAlignment: MainAxisAlignment.center,
          children: <Widget>[
            new NumberPicker.integer(
                initialValue: _currentValue,
                minValue: 0,
                maxValue: 100,
                onChanged: (newValue) =>
                    setState(() => _currentValue = newValue)),
            new Text("Current number: $_currentValue"),
          ],
        ),
      ),
      appBar: new AppBar(
        title: new Text(widget.title),
      ),
    );
  }
}
```

--------------------------------

### Create Integer NumberPicker Widget

Source: https://github.com/andrezanna/numberpicker/blob/master/README.md

Instantiate an integer NumberPicker with initial value, min/max bounds, and a change handler.

```dart
new NumberPicker.integer(
                initialValue: 50,
                minValue: 0,
                maxValue: 100,
                onChanged: _handleChange)
```

--------------------------------

### Create Decimal NumberPickerDialog

Source: https://github.com/andrezanna/numberpicker/blob/master/README.md

Instantiate a decimal NumberPicker dialog with min/max bounds and an initial double value. This is intended for use with showDialog.

```dart
new NumberPickerDialog.decimal(
          minValue: 1,
          maxValue: 10,
          initialDoubleValue: _currentPrice)
```

--------------------------------

### Create Integer NumberPicker

Source: https://context7.com/andrezanna/numberpicker/llms.txt

Use NumberPicker.integer for selecting whole numbers. It requires an initial value, minimum and maximum bounds, and an onChanged callback.

```dart
import 'package:flutter/material.dart';
import 'package:numberpicker/numberpicker.dart';

class IntegerPickerExample extends StatefulWidget {
  @override
  _IntegerPickerExampleState createState() => _IntegerPickerExampleState();
}

class _IntegerPickerExampleState extends State<IntegerPickerExample> {
  int _currentValue = 50;

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(title: Text('Integer Picker')),
      body: Center(
        child: Column(
          mainAxisAlignment: MainAxisAlignment.center,
          children: <Widget>[
            NumberPicker.integer(
              initialValue: _currentValue,
              minValue: 0,
              maxValue: 100,
              onChanged: (newValue) => setState(() => _currentValue = newValue),
            ),
            Text("Selected value: $_currentValue"),
          ],
        ),
      ),
    );
  }
}

```

--------------------------------

### Create Decimal NumberPicker

Source: https://context7.com/andrezanna/numberpicker/llms.txt

Use NumberPicker.decimal for selecting decimal numbers. Configure the number of decimal places with the 'decimalPlaces' parameter. It supports a range and an onChanged callback.

```dart
import 'package:flutter/material.dart';
import 'package:numberpicker/numberpicker.dart';

class DecimalPickerExample extends StatefulWidget {
  @override
  _DecimalPickerExampleState createState() => _DecimalPickerExampleState();
}

class _DecimalPickerExampleState extends State<DecimalPickerExample> {
  double _currentDoubleValue = 3.0;

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(title: Text('Decimal Picker')),
      body: Center(
        child: Column(
          mainAxisAlignment: MainAxisAlignment.center,
          children: <Widget>[
            NumberPicker.decimal(
              initialValue: _currentDoubleValue,
              minValue: 1,
              maxValue: 5,
              decimalPlaces: 2,  // Shows values like 1.00, 1.01, 1.02, etc.
              onChanged: (value) => setState(() => _currentDoubleValue = value),
            ),
            Text("Selected value: $_currentDoubleValue"),
          ],
        ),
      ),
    );
  }
}

```

--------------------------------

### Configure Custom Dimensions for NumberPicker

Source: https://context7.com/andrezanna/numberpicker/llms.txt

Customize the height of each item (`itemExtent`), the width of the list view (`listViewWidth`), and the height of the list view (`listViewHeight`) to match your specific UI design requirements.

```dart
import 'package:flutter/material.dart';
import 'package:numberpicker/numberpicker.dart';

class CustomSizePickerExample extends StatefulWidget {
  @override
  _CustomSizePickerExampleState createState() => _CustomSizePickerExampleState();
}

class _CustomSizePickerExampleState extends State<CustomSizePickerExample> {
  int _currentValue = 50;

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(title: Text('Custom Size Picker')),
      body: Center(
        child: NumberPicker.integer(
          initialValue: _currentValue,
          minValue: 0,
          maxValue: 100,
          itemExtent: 60.0,         // Height of each item (default: 50.0)
          listViewWidth: 120.0,     // Width of the list view (default: 100.0)
          listViewHeight: 180.0,    // Height of the list view (default: 150.0)
          onChanged: (value) => setState(() => _currentValue = value),
        ),
      ),
    );
  }
}

```

--------------------------------

### Animate NumberPicker Programmatically

Source: https://context7.com/andrezanna/numberpicker/llms.txt

Use `animateInt()` for integer values, `animateDecimal()` for the decimal part, and `animateDecimalAndInteger()` for full decimal values. This is useful for synchronizing the picker with external controls or preset buttons.

```dart
import 'dart:async';
import 'package:flutter/material.dart';
import 'package:numberpicker/numberpicker.dart';

class AnimatedPickerExample extends StatefulWidget {
  @override
  _AnimatedPickerExampleState createState() => _AnimatedPickerExampleState();
}

class _AnimatedPickerExampleState extends State<AnimatedPickerExample> {
  int _currentIntValue = 10;
  double _currentDoubleValue = 3.0;
  NumberPicker integerNumberPicker;
  NumberPicker decimalNumberPicker;

  _handleValueChanged(num value) {
    if (value is int) {
      setState(() => _currentIntValue = value);
    } else {
      setState(() => _currentDoubleValue = value);
    }
  }

  // Programmatically set value and animate picker
  _handleExternalValueChange(num value) {
    if (value is int) {
      setState(() => _currentIntValue = value);
      integerNumberPicker.animateInt(value);  // Animate to new integer value
    } else {
      setState(() => _currentDoubleValue = value);
      decimalNumberPicker.animateDecimalAndInteger(value);  // Animate both parts
    }
  }

  @override
  Widget build(BuildContext context) {
    integerNumberPicker = NumberPicker.integer(
      initialValue: _currentIntValue,
      minValue: 0,
      maxValue: 100,
      onChanged: _handleValueChanged,
    );

    decimalNumberPicker = NumberPicker.decimal(
      initialValue: _currentDoubleValue,
      minValue: 1,
      maxValue: 5,
      decimalPlaces: 2,
      onChanged: _handleValueChanged,
    );

    return Scaffold(
      appBar: AppBar(title: Text('Animated Picker')),
      body: Column(
        mainAxisAlignment: MainAxisAlignment.spaceAround,
        children: <Widget>[
          integerNumberPicker,
          Row(
            mainAxisAlignment: MainAxisAlignment.center,
            children: <Widget>[
              RaisedButton(
                onPressed: () => _handleExternalValueChange(0),
                child: Text("Set to 0"),
              ),
              RaisedButton(
                onPressed: () => _handleExternalValueChange(50),
                child: Text("Set to 50"),
              ),
              RaisedButton(
                onPressed: () => _handleExternalValueChange(100),
                child: Text("Set to 100"),
              ),
            ],
          ),
          decimalNumberPicker,
          RaisedButton(
            onPressed: () => _handleExternalValueChange(2.50),
            child: Text("Set to 2.50"),
          ),
        ],
      ),
    );
  }
}

```

--------------------------------

### Horizontal Layout NumberPicker

Source: https://context7.com/andrezanna/numberpicker/llms.txt

Configure NumberPicker for horizontal scrolling by setting the 'horizontal' parameter to true. This applies to both integer and decimal pickers.

```dart
import 'package:flutter/material.dart';
import 'package:numberpicker/numberpicker.dart';

class HorizontalPickerExample extends StatefulWidget {
  @override
  _HorizontalPickerExampleState createState() => _HorizontalPickerExampleState();
}

class _HorizontalPickerExampleState extends State<HorizontalPickerExample> {
  int _currentValue = 10;
  double _currentDoubleValue = 3.0;

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(title: Text('Horizontal Pickers')),
      body: Center(
        child: Column(
          mainAxisAlignment: MainAxisAlignment.spaceAround,
          children: <Widget>[
            // Horizontal integer picker
            NumberPicker.integer(
              initialValue: _currentValue,
              minValue: 0,
              maxValue: 100,
              horizontal: true,
              onChanged: (value) => setState(() => _currentValue = value),
            ),
            Text("Integer: $_currentValue"),

            // Horizontal decimal picker
            NumberPicker.decimal(
              initialValue: _currentDoubleValue,
              minValue: 1,
              maxValue: 5,
              decimalPlaces: 2,
              horizontal: true,
              onChanged: (value) => setState(() => _currentDoubleValue = value),
            ),
            Text("Decimal: $_currentDoubleValue"),
          ],
        ),
      ),
    );
  }
}

```

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