refactor ui

web/repertory/lib/widgets/app_dropdown.dart

@@ -0,0 +1,141 @@
+import 'package:flutter/material.dart';
+import 'package:repertory/constants.dart' as constants;
+import 'package:repertory/helpers.dart';
+
+class AppDropdownFormField<T> extends StatelessWidget {
+  const AppDropdownFormField({
+    super.key,
+    required this.values,
+    required this.labelOf,
+    this.value,
+    this.onChanged,
+    this.validator,
+    this.labelText,
+    this.prefixIcon,
+    this.enabled = true,
+    this.constrainToIntrinsic = false,
+    this.widthMultiplier = 1.0,
+    this.maxWidth,
+    this.isExpanded = false,
+    this.dropdownColor,
+    this.textStyle,
+    this.contentPadding,
+    this.fillColor,
+  });
+
+  final List<T> values;
+  final String Function(T value) labelOf;
+  final T? value;
+  final ValueChanged<T?>? onChanged;
+  final FormFieldValidator<T>? validator;
+  final String? labelText;
+  final IconData? prefixIcon;
+  final bool enabled;
+  final bool constrainToIntrinsic;
+  final double widthMultiplier;
+  final double? maxWidth;
+  final bool isExpanded;
+  final Color? dropdownColor;
+  final TextStyle? textStyle;
+  final EdgeInsetsGeometry? contentPadding;
+
+  final Color? fillColor;
+
+  double _measureTextWidth(
+    BuildContext context,
+    String text,
+    TextStyle? style,
+  ) {
+    final tp = TextPainter(
+      text: TextSpan(text: text, style: style),
+      maxLines: 1,
+      textDirection: Directionality.of(context),
+    )..layout();
+    return tp.width;
+  }
+
+  double? _computedMaxWidth(BuildContext context) {
+    if (!constrainToIntrinsic) return maxWidth;
+
+    final theme = Theme.of(context);
+    final scheme = theme.colorScheme;
+    final effectiveStyle =
+        textStyle ??
+        theme.textTheme.bodyMedium?.copyWith(
+          color: scheme.onSurface.withValues(alpha: 0.96),
+        );
+
+    final longest = values.isEmpty
+        ? ''
+        : values
+              .map((v) => labelOf(v))
+              .reduce((a, b) => a.length >= b.length ? a : b);
+
+    final labelW = _measureTextWidth(context, longest, effectiveStyle);
+
+    final prefixW = prefixIcon == null ? 0.0 : 48.0;
+    const arrowW = 32.0;
+    final pad = contentPadding ?? const EdgeInsets.all(constants.paddingSmall);
+    final padW = (pad is EdgeInsets)
+        ? (pad.left + pad.right)
+        : constants.paddingSmall * 2;
+
+    final base = labelW + prefixW + arrowW + padW;
+
+    final cap =
+        maxWidth ?? (MediaQuery.of(context).size.width - constants.padding * 2);
+    return (base * widthMultiplier).clamp(0.0, cap);
+  }
+
+  @override
+  Widget build(BuildContext context) {
+    final theme = Theme.of(context);
+    final scheme = theme.colorScheme;
+
+    final effectiveFill =
+        fillColor ?? scheme.primary.withValues(alpha: constants.primaryAlpha);
+
+    final effectiveTextStyle =
+        textStyle ??
+        theme.textTheme.bodyMedium?.copyWith(
+          color: scheme.onSurface.withValues(alpha: 0.96),
+        );
+
+    final items = values.map((v) {
+      return DropdownMenuItem<T>(
+        value: v,
+        child: Text(
+          labelOf(v),
+          style: effectiveTextStyle,
+          overflow: TextOverflow.ellipsis,
+        ),
+      );
+    }).toList();
+
+    final field = DropdownButtonFormField<T>(
+      decoration: createCommonDecoration(scheme, labelText ?? ""),
+      dropdownColor: dropdownColor ?? effectiveFill,
+      iconEnabledColor: scheme.onSurface.withValues(alpha: 0.90),
+      initialValue: value,
+      isExpanded: isExpanded,
+      items: items,
+      onChanged: enabled ? onChanged : null,
+      style: effectiveTextStyle,
+      validator: validator,
+    );
+
+    final maxW = _computedMaxWidth(context);
+    final wrapped = maxW == null
+        ? field
+        : ConstrainedBox(
+            constraints: BoxConstraints(maxWidth: maxW),
+            child: field,
+          );
+
+    return Align(
+      alignment: Alignment.centerLeft,
+      heightFactor: 1.0,
+      child: wrapped,
+    );
+  }
+}