ModalCalc function

Implementation

void ModalCalc(context, String label, String currentValue, Function callback, bool currency){

  String inputValue = currentValue == '0' || currentValue == '0.0' || currentValue == '.0' ? '' : currentValue;
  List valuesRow1 = ['1', '2', '3' ];
  List valuesRow2 = ['4', '5', '6' ];
  List valuesRow3 = ['7', '8', '9' ];
  List valuesRow4 = ['.', '0', 'back' ];
  List values = [ valuesRow1, valuesRow2, valuesRow3, valuesRow4 ];

  void delete(Function setStateModal){
    if (inputValue.isNotEmpty) {
      setStateModal(()=> inputValue = inputValue.substring(0, inputValue.length - 1) );
    }
  }

  void confirm(){
    Navigator.pop(context);
    callback(inputValue);
  }


  Widget child = StatefulBuilder(
    builder: (BuildContext context, StateSetter setStateModal ) {

      ColorScheme colorScheme = Theme.of(context).colorScheme;
      final customColors = CustomColors();
      final customIcons = CustomIcons();

      return Container(
        color: colorScheme.background,
        margin: const EdgeInsets.fromLTRB(8, 8, 8, 24),
        height: MediaQuery.of(context).size.height - (isPortrait(context) ? 0 : 264), //360.0
        child: Column(
          mainAxisAlignment: MainAxisAlignment.spaceBetween,
          children: [

            CustomAppBarModal(
              buttonType: ButtonType.icon,
              title: label,
              centerTitle: true,
              options: {
                'cancel': ()=>Navigator.of(context).pop(),
                'confirm': ()=>confirm()
              }
            ),

            const SizedBox(height: 48),
            Text('${currency ? '\$ ' : ''}$inputValue', style: TextStyle(fontSize: 32) ),
            const SizedBox(height: 24),

            Column(
              children: List.generate(values.length, (index) {
                List rowValues = values[index];
                return Row(
                  mainAxisAlignment: MainAxisAlignment.spaceBetween,
                  children: List.generate(rowValues.length, (index) {
                    String value = rowValues[index];
                    return CustomElevatedButton(
                      flex: 1,
                      borderRadius: BorderRadius.circular(0),
                      margin: const EdgeInsets.all(1),
                      backgroundColor: colorScheme.background,
                      padding: const EdgeInsets.fromLTRB(16, 16, 16, 16),
                      child: value == 'back'
                        ? Icon(customIcons.backspace, color: customColors.error)
                        : Text( value, style: TextStyle(fontSize: 24), textAlign: TextAlign.center, ),
                      onPressed: ()=>
                        value == 'back' ? delete(setStateModal)
                        : setStateModal(() => inputValue += value )
                    );
                  }),
                );
              })
            )


          ],
        ),
      );

    }
  );

  customAutoDialog(context, child);

}