Move formatting

Author: jpnurmi

lib/src/base_spin_box.dart

@@ -52,7 +52,12 @@ mixin SpinBoxMixin<T extends BaseSpinBox> on State<T> {
   SpinController get controller => _controller;
   TextEditingController get editor => _editor;
   FocusNode get focusNode => _focusNode;
-  TextInputFormatter get formatter => SpinFormatter(_controller);
+  SpinFormatter get formatter => SpinFormatter(_controller);
+
+  String _formatValue(double value) {
+    return formatter.formatValue(value,
+        decimals: widget.decimals, digits: widget.digits);
+  }
 
   Map<ShortcutActivator, VoidCallback> get bindings {
     return {
@@ -76,10 +81,9 @@ mixin SpinBoxMixin<T extends BaseSpinBox> on State<T> {
           pageStep: widget.pageStep,
           value: widget.value,
           decimals: widget.decimals,
-          digits: widget.digits,
         );
     _controller.addListener(_handleValueChange);
-    _editor = TextEditingController(text: _controller.format(widget.value));
+    _editor = TextEditingController(text: _formatValue(widget.value));
     _editor.addListener(_handleTextChange);
     _focusNode = widget.focusNode ?? FocusNode();
     _focusNode.addListener(_handleFocusChange);
@@ -112,7 +116,7 @@ mixin SpinBoxMixin<T extends BaseSpinBox> on State<T> {
   }
 
   void _updateText(double newValue) {
-    final text = _controller.format(newValue);
+    final text = _formatValue(newValue);
     final selection = _editor.selection;
     final oldOffset = _controller.value.isNegative ? 1 : 0;
     final newOffset = _controller.parse(text)?.isNegative == true ? 1 : 0;
@@ -130,7 +134,7 @@ mixin SpinBoxMixin<T extends BaseSpinBox> on State<T> {
   void fixupValue(String text) {
     final v = _controller.parse(text);
     if (v == null) {
-      _editor.text = _controller.format(_controller.value);
+      _editor.text = _formatValue(_controller.value);
     } else if (v < _controller.min || v > _controller.max) {
       _controller.value = v.clamp(_controller.min, _controller.max);
     }

lib/src/spin_controller.dart

@@ -30,7 +30,6 @@ class SpinController extends ValueNotifier<double> {
     this.step = 1,
     this.pageStep,
     this.decimals = 0,
-    this.digits = 0,
   })  : _min = min,
         _max = max,
         super(value);
@@ -41,7 +40,6 @@ class SpinController extends ValueNotifier<double> {
   final double step;
   final double? pageStep;
   final int decimals;
-  final int digits;
 
   double get min => _min;
   set min(double min) {
@@ -61,10 +59,6 @@ class SpinController extends ValueNotifier<double> {
     value = value.clamp(min, max);
   }
 
-  String format(double value) {
-    return value.toStringAsFixed(decimals).padLeft(digits, '0');
-  }
-
   double? parse(String text) {
     if (decimals > 0) {
       return double.tryParse(text);

lib/src/spin_formatter.dart

@@ -31,6 +31,14 @@ class SpinFormatter extends TextInputFormatter {
 
   final SpinController _controller;
 
+  String formatValue(
+    double value, {
+    required int decimals,
+    required int digits,
+  }) {
+    return value.toStringAsFixed(decimals).padLeft(digits, '0');
+  }
+
   @override
   TextEditingValue formatEditUpdate(
     TextEditingValue oldValue,