number_inc_dec 0.6.0+3

A flutter widget which accepts numeric values with buttons to increment and decrement.

number_inc_dec

A flutter widget that accepts numbers along with buttons to increment and decrement. This is a simple TextFormField with buttons and logic to handle factored increments/decrements and with some additional properties like minimum and maximum allowed value. The factor of incrementing/decrementing is also configurable.

Please check the example section which provides examples for each options.

Getting Started

1. Install the latest version of the package by adding it to pubspec.yaml as noted in the install page.

2. Import the number_inc_dec.dart as follows import 'package:number_inc_dec/number_inc_dec.dart';.

3. Utilize the NumberIncrementDecrement as usual like any other flutter widget.

   • e.g.

     NumberInputWithIncrementDecrement(
        controller: TextEditingController(),
        min: -3,
        max: 3,
     ),
     

Demo with different options

Check the examples sections for the corresponding code snippets.

Configurable options

NumberInputWithIncrementDecrementwidget comes with some configurable options. The same configurations are application for NumberInputPrefabbed widgets.

Property	Type	Purpose	Default Value
controller	TextEditingController	A mandatory text editing controller to be used by the TextFormField.	This is a mandatory field because its the easiest way to access the field's value, when not using a Form widget.
buttonArrangement	ButtonArrangement	Decides the layout of the increment/decrement buttons. Following values are possible. 1. leftEnd 2. rightEnd 3. incLeftDecRight 4.incRightDecLeft	ButtonArrangement.rightEnd
autovalidate	bool	This is passed down to the TextFormField. It auto-validates the field with the provided validators. Check TextFormField documentation for more details.	false
min	num	Minimum acceptable value for this numeric field. Note: No error message will be shown. To show error a validator can be used and the widget should wrapped in Form widget.	0
max	num	Maximum acceptable value for this numeric field. Note: No error message will be shown. To show error a validator can be used and the widget should wrapped in Form widget.	double.infinity
incDecFactor	num	Factor by which the increment or decrement should happen. e.g. setting it 0.5 increments/decrements the field value by 0.5.	1
initialValue	num	An initial value to be set to the field.	0
isInt	bool	A flag to indicate if the field only accepts integer values. To use double values set this field to false.	true
numberFieldDecoration	InputDecoration	This decoration will be used by the TextFormField to handle its decoration.	An InputDecoration with an OutlineInputBorder to create a circular border.
widgetContainerDecoration	Decoration	This is the decoration for the Container that wraps this widget.	A simple BoxDecoration with a circular border in Colors.bluegrey color.
validator	FormFieldValidator	A validator function which accepts a string and performs some validation. This is called when this field is wrapped inside a Form widget and called during its validate cycle. The error message to be shown should be returned form this method.	A min max validator. Refer the API documentation for more details.
fractionDigits	int	The number of digits after the decimal point. Used only if isInt is false.	2
incIcon	IconData	The icon to be used for the increment button.	Icons.arrow_drop_up
decIcon	IconData	The icon to be used for the decrement button.	Icons.arrow_drop_down
incIconDecoration	Decoration	Decoration for the Increment Icon	Defaults to a black border in the bottom  and/or top depending on the buttonArrangement.
decIconDecoration	Decoration	Decoration for the decrement Icon	Defaults to a black border in the bottom  and/or top depending on the buttonArrangement.
incIconColor	Color	Icon color to be used for Increment button.	Defaults to color defined in IconTheme
decIconColor	Color	Icon color to be used for Decrement button.	Defaults to color defined in IconTheme
incIconSize	double	Icon size to be used for Increment button.	Defaults to size defined in IconTheme
decIconSize	double	Icon size to be used for Decrement button.	Defaults to size defined in IconTheme
onIncrement	DiffIncDecCallBack	A call back function to be called on successful increment. This will not be called if the internal validators fail.	null
onDecrement	DiffIncDecCallBack	A call back function to be called on successful decrement. This will not be called if the internal validators fail.	null
scaleWidth	double	A scaling factor for the width of the widget.	1.0
scaleHeight	double	A scaling factor for the height of the widget.	1.0
separateIcons	bool	Show a transparent separator between the increment & decrement buttons.	false
incDecBgColor	Color	Background color of the increment decrement button. This is set to Colors.lightGreen for all the NumberInputPrefabbed widgets to capture users attention.	widget tonull