fill
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349
lib/core/widgets/custom_button.dart
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349
lib/core/widgets/custom_button.dart
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import 'package:flutter/material.dart';
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/// Custom button widget with loading state and consistent styling
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///
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/// This widget provides a reusable button component with:
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/// - Loading indicator support
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/// - Disabled state
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/// - Customizable colors, icons, and text
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/// - Consistent padding and styling
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///
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/// Usage:
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/// ```dart
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/// CustomButton(
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/// text: 'Login',
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/// onPressed: _handleLogin,
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/// isLoading: _isLoading,
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/// )
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///
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/// CustomButton.outlined(
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/// text: 'Cancel',
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/// onPressed: _handleCancel,
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/// )
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///
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/// CustomButton.text(
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/// text: 'Skip',
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/// onPressed: _handleSkip,
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/// )
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/// ```
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class CustomButton extends StatelessWidget {
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/// Button text
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final String text;
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/// Callback when button is pressed
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final VoidCallback? onPressed;
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/// Whether the button is in loading state
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final bool isLoading;
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/// Optional icon to display before text
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final IconData? icon;
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/// Button style variant
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final ButtonStyle? style;
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/// Whether this is an outlined button
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final bool isOutlined;
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/// Whether this is a text button
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final bool isTextButton;
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/// Minimum button width (null for full width)
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final double? minWidth;
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/// Minimum button height
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final double? minHeight;
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/// Background color (only for elevated buttons)
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final Color? backgroundColor;
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/// Foreground/text color
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final Color? foregroundColor;
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/// Border color (only for outlined buttons)
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final Color? borderColor;
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/// Font size
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final double? fontSize;
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/// Font weight
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final FontWeight? fontWeight;
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const CustomButton({
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super.key,
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required this.text,
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required this.onPressed,
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this.isLoading = false,
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this.icon,
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this.style,
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this.minWidth,
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this.minHeight,
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this.backgroundColor,
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this.foregroundColor,
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this.fontSize,
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this.fontWeight,
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}) : isOutlined = false,
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isTextButton = false,
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borderColor = null;
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/// Create an outlined button variant
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const CustomButton.outlined({
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super.key,
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required this.text,
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required this.onPressed,
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this.isLoading = false,
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this.icon,
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this.style,
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this.minWidth,
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this.minHeight,
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this.foregroundColor,
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this.borderColor,
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this.fontSize,
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this.fontWeight,
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}) : isOutlined = true,
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isTextButton = false,
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backgroundColor = null;
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/// Create a text button variant
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const CustomButton.text({
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super.key,
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required this.text,
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required this.onPressed,
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this.isLoading = false,
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this.icon,
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this.style,
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this.minWidth,
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this.minHeight,
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this.foregroundColor,
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this.fontSize,
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this.fontWeight,
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}) : isOutlined = false,
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isTextButton = true,
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backgroundColor = null,
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borderColor = null;
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@override
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Widget build(BuildContext context) {
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final theme = Theme.of(context);
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final colorScheme = theme.colorScheme;
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// Determine if button should be disabled
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final bool isDisabled = onPressed == null || isLoading;
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// Build button content
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Widget content;
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if (isLoading) {
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content = SizedBox(
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height: 20,
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width: 20,
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child: CircularProgressIndicator(
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strokeWidth: 2,
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valueColor: AlwaysStoppedAnimation<Color>(
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isTextButton
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? foregroundColor ?? colorScheme.primary
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: foregroundColor ?? colorScheme.onPrimary,
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),
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),
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);
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} else if (icon != null) {
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content = Row(
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mainAxisSize: MainAxisSize.min,
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mainAxisAlignment: MainAxisAlignment.center,
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children: [
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Icon(icon, size: 20),
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const SizedBox(width: 8),
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Flexible(
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child: Text(
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text,
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overflow: TextOverflow.ellipsis,
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),
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),
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],
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);
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} else {
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content = Text(text);
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}
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// Build button style
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final ButtonStyle buttonStyle = style ??
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(isTextButton
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? _buildTextButtonStyle(context)
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: isOutlined
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? _buildOutlinedButtonStyle(context)
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: _buildElevatedButtonStyle(context));
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// Build appropriate button widget
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if (isTextButton) {
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return TextButton(
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onPressed: isDisabled ? null : onPressed,
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style: buttonStyle,
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child: content,
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);
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} else if (isOutlined) {
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return OutlinedButton(
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onPressed: isDisabled ? null : onPressed,
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style: buttonStyle,
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child: content,
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);
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} else {
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return ElevatedButton(
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onPressed: isDisabled ? null : onPressed,
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style: buttonStyle,
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child: content,
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);
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}
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}
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/// Build elevated button style
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ButtonStyle _buildElevatedButtonStyle(BuildContext context) {
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final colorScheme = Theme.of(context).colorScheme;
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return ElevatedButton.styleFrom(
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backgroundColor: backgroundColor ?? colorScheme.primary,
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foregroundColor: foregroundColor ?? colorScheme.onPrimary,
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minimumSize: Size(
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minWidth ?? double.infinity,
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minHeight ?? 48,
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),
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textStyle: TextStyle(
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fontSize: fontSize ?? 16,
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fontWeight: fontWeight ?? FontWeight.w600,
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),
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elevation: 0,
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shape: RoundedRectangleBorder(
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borderRadius: BorderRadius.circular(8),
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),
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padding: const EdgeInsets.symmetric(
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horizontal: 24,
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vertical: 12,
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),
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);
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}
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/// Build outlined button style
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ButtonStyle _buildOutlinedButtonStyle(BuildContext context) {
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final colorScheme = Theme.of(context).colorScheme;
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return OutlinedButton.styleFrom(
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foregroundColor: foregroundColor ?? colorScheme.primary,
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side: BorderSide(
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color: borderColor ?? colorScheme.primary,
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width: 1.5,
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),
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minimumSize: Size(
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minWidth ?? double.infinity,
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minHeight ?? 48,
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),
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textStyle: TextStyle(
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fontSize: fontSize ?? 16,
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fontWeight: fontWeight ?? FontWeight.w600,
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),
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shape: RoundedRectangleBorder(
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borderRadius: BorderRadius.circular(8),
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),
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padding: const EdgeInsets.symmetric(
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horizontal: 24,
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vertical: 12,
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),
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);
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}
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/// Build text button style
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ButtonStyle _buildTextButtonStyle(BuildContext context) {
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final colorScheme = Theme.of(context).colorScheme;
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return TextButton.styleFrom(
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foregroundColor: foregroundColor ?? colorScheme.primary,
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minimumSize: Size(
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minWidth ?? 0,
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minHeight ?? 48,
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),
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textStyle: TextStyle(
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fontSize: fontSize ?? 16,
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fontWeight: fontWeight ?? FontWeight.w600,
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),
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shape: RoundedRectangleBorder(
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borderRadius: BorderRadius.circular(8),
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),
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padding: const EdgeInsets.symmetric(
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horizontal: 16,
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vertical: 12,
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),
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);
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}
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}
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/// Icon button with loading state
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class CustomIconButton extends StatelessWidget {
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/// Icon to display
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final IconData icon;
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/// Callback when button is pressed
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final VoidCallback? onPressed;
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/// Whether the button is in loading state
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final bool isLoading;
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/// Icon size
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final double? iconSize;
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/// Icon color
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final Color? color;
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/// Background color
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final Color? backgroundColor;
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/// Tooltip text
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final String? tooltip;
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const CustomIconButton({
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super.key,
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required this.icon,
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required this.onPressed,
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this.isLoading = false,
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this.iconSize,
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this.color,
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this.backgroundColor,
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this.tooltip,
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});
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@override
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Widget build(BuildContext context) {
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final theme = Theme.of(context);
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final bool isDisabled = onPressed == null || isLoading;
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Widget button = IconButton(
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icon: isLoading
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? SizedBox(
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height: iconSize ?? 24,
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width: iconSize ?? 24,
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child: CircularProgressIndicator(
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strokeWidth: 2,
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valueColor: AlwaysStoppedAnimation<Color>(
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color ?? theme.colorScheme.primary,
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),
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),
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)
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: Icon(
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icon,
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size: iconSize ?? 24,
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color: color,
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),
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onPressed: isDisabled ? null : onPressed,
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style: backgroundColor != null
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? IconButton.styleFrom(
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backgroundColor: backgroundColor,
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)
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: null,
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);
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if (tooltip != null) {
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return Tooltip(
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message: tooltip!,
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child: button,
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);
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}
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return button;
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}
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}
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