first commit for mih package toolkit
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235
lib/src/mih_date_field.dart
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235
lib/src/mih_date_field.dart
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import 'package:flutter/material.dart';
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import 'package:mih_package_toolkit/src/mih_colors.dart';
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/// A customized date selection field that integrates with [showDatePicker].
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///
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/// The [MihDateField] provides a stylized wrapper around a read-only [TextFormField].
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/// When tapped, it opens the system date picker and formats the result into
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/// the provided [controller].
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///
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/// It features:
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/// * Built-in validation support via [validator].
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/// * Automatic labeling with an optional "(Optional)" suffix.
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/// * Theme-aware styling that syncs with [MihColors].
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/// * Custom elevation and border radius.
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class MihDateField extends StatefulWidget {
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/// The controller that handles the text being edited.
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///
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/// The date will be stored in `YYYY-MM-DD` format.
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final TextEditingController controller;
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/// The text to display above the input field.
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final String labelText;
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/// Whether this field is mandatory.
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///
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/// If `false`, a "(Optional)" tag will be displayed next to the [labelText].
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final bool required;
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/// The width of the entire widget.
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final double? width;
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/// The height of the entire widget.
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final double? height;
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/// The radius of the input field corners. Defaults to 8.0.
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final double? borderRadius;
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/// The elevation of the input field material. Defaults to 4.0.
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final double? elevation;
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/// Whether to use Dark Mode styling. If null, [MihColors] defaults to dark.
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final bool? darkMode;
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/// An optional method that validates an input.
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///
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/// Returns an error string to display if the input is invalid, or null otherwise.
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final FormFieldValidator<String>? validator;
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const MihDateField({
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super.key,
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required this.controller,
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required this.labelText,
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required this.required,
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this.width,
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this.height,
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this.borderRadius,
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this.elevation,
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this.darkMode,
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this.validator,
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});
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@override
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State<MihDateField> createState() => _MihDateFieldState();
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}
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class _MihDateFieldState extends State<MihDateField> {
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/// Used to manually trigger state changes for the internal [FormField]
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/// when the date picker updates the [TextEditingController].
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FormFieldState<String>? _formFieldState;
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/// Internal method to trigger the Material [showDatePicker].
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///
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/// It attempts to parse the current text in the controller to set the
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/// [initialDate], defaulting to [DateTime.now] if empty or invalid.
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Future<void> _selectDate(BuildContext context) async {
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DateTime? picked = await showDatePicker(
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context: context,
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initialDate: widget.controller.text.isNotEmpty
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? DateTime.tryParse(widget.controller.text) ?? DateTime.now()
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: DateTime.now(),
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firstDate: DateTime(1900),
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lastDate: DateTime(2200),
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);
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if (picked != null) {
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widget.controller.text = picked.toString().split(" ")[0];
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_formFieldState?.didChange(widget.controller.text);
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setState(() {});
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}
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}
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@override
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Widget build(BuildContext context) {
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return Center(
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child: SizedBox(
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width: widget.width,
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height: widget.height,
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child: Column(
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crossAxisAlignment: CrossAxisAlignment.start,
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children: [
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Row(
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mainAxisAlignment: MainAxisAlignment.spaceBetween,
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children: [
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Text(
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widget.labelText,
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style: TextStyle(
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color: MihColors.secondary(darkMode: widget.darkMode),
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fontSize: 18,
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fontWeight: FontWeight.bold,
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),
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),
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if (!widget.required)
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Text(
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"(Optional)",
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style: TextStyle(
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color: MihColors.secondary(darkMode: widget.darkMode),
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fontSize: 15,
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fontWeight: FontWeight.bold,
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),
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),
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],
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),
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const SizedBox(height: 4),
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FormField<String>(
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initialValue: widget.controller.text,
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validator: widget.validator,
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autovalidateMode: AutovalidateMode.onUserInteraction,
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builder: (field) {
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_formFieldState = field;
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return Column(
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crossAxisAlignment: CrossAxisAlignment.start,
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children: [
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Material(
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elevation: widget.elevation ?? 4.0,
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borderRadius: BorderRadius.circular(
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widget.borderRadius ?? 8.0,
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),
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child: TextFormField(
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controller: widget.controller,
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readOnly: true,
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onTap: () => _selectDate(context),
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style: TextStyle(
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color: MihColors.primary(darkMode: widget.darkMode),
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fontWeight: FontWeight.w500,
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),
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decoration: InputDecoration(
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suffixIcon: Icon(
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Icons.calendar_today,
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color: MihColors.primary(darkMode: widget.darkMode),
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),
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errorStyle: const TextStyle(height: 0, fontSize: 0),
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contentPadding: const EdgeInsets.symmetric(
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horizontal: 10.0,
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vertical: 8.0,
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),
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filled: true,
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fillColor: MihColors.secondary(
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darkMode: widget.darkMode,
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),
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border: OutlineInputBorder(
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borderRadius: BorderRadius.circular(
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widget.borderRadius ?? 8.0,
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),
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borderSide: field.hasError
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? BorderSide(
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color: MihColors.red(
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darkMode: widget.darkMode,
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),
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width: 2.0,
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)
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: BorderSide.none,
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),
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enabledBorder: OutlineInputBorder(
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borderRadius: BorderRadius.circular(
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widget.borderRadius ?? 8.0,
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),
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borderSide: BorderSide.none,
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),
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focusedBorder: OutlineInputBorder(
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borderRadius: BorderRadius.circular(
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widget.borderRadius ?? 8.0,
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),
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borderSide: BorderSide(
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color: field.hasError
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? MihColors.red(darkMode: widget.darkMode)
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: MihColors.secondary(
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darkMode: widget.darkMode,
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),
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width: 3.0,
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),
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),
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errorBorder: OutlineInputBorder(
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borderRadius: BorderRadius.circular(
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widget.borderRadius ?? 8.0,
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),
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borderSide: BorderSide(
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color: MihColors.red(darkMode: widget.darkMode),
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width: 3.0,
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),
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),
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focusedErrorBorder: OutlineInputBorder(
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borderRadius: BorderRadius.circular(
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widget.borderRadius ?? 8.0,
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),
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borderSide: BorderSide(
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color: MihColors.red(darkMode: widget.darkMode),
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width: 3.0,
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),
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),
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),
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onChanged: (value) {
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field.didChange(value);
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},
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),
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),
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if (field.hasError)
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Padding(
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padding: const EdgeInsets.only(left: 8.0, top: 4.0),
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child: Text(
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field.errorText ?? '',
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style: TextStyle(
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fontSize: 12,
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color: MihColors.red(darkMode: widget.darkMode),
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fontWeight: FontWeight.bold,
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),
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),
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),
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],
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);
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},
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),
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],
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),
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),
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);
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}
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}
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