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Last activeAugust 2, 2023 18:42
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Card Number InputFormatter - format payment card inputs automatically for month and card numbers
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| classCardMonthInputFormatterextendsTextInputFormatter { | |
| @override | |
| TextEditingValueformatEditUpdate( | |
| TextEditingValue oldValue,TextEditingValue newValue) { | |
| var newText= newValue.text; | |
| if (newValue.selection.baseOffset==0) { | |
| return newValue; | |
| } | |
| var buffer=StringBuffer(); | |
| for (int i=0; i< newText.length; i++) { | |
| buffer.write(newText[i]); | |
| var nonZeroIndex= i+1; | |
| if (nonZeroIndex%2==0&& nonZeroIndex!= newText.length) { | |
| buffer.write('/'); | |
| } | |
| } | |
| var string= buffer.toString(); | |
| return newValue.copyWith( | |
| text: string, | |
| selection:TextSelection.collapsed(offset: string.length)); | |
| } | |
| } | |
| @dubemezeagwu |
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.Learn more about bidirectional Unicode characters
| classCardNumberInputFormatterextendsTextInputFormatter { | |
| @override | |
| TextEditingValueformatEditUpdate( | |
| TextEditingValue oldValue,TextEditingValue newValue) { | |
| var newText= newValue.text; | |
| if (newValue.selection.baseOffset==0) { | |
| return newValue; | |
| } | |
| var buffer=StringBuffer(); | |
| for (int i=0; i< newText.length; i++) { | |
| buffer.write(newText[i]); | |
| var nonZeroIndex= i+1; | |
| if (nonZeroIndex%4==0&& nonZeroIndex!= newText.length) { | |
| buffer.write(" ");// Single space | |
| } | |
| } | |
| var string= buffer.toString(); | |
| return newValue.copyWith( | |
| text: string, | |
| selection:TextSelection.collapsed(offset: string.length)); | |
| } | |
| } |
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