stack_wallet/lib/widgets/emoji_select_sheet.dart

import 'package:emojis/emoji.dart';
import 'package:flutter/material.dart';
import 'package:flutter_riverpod/flutter_riverpod.dart';
import 'package:stackwallet/utilities/constants.dart';
import 'package:stackwallet/utilities/text_styles.dart';
import 'package:stackwallet/utilities/theme/stack_theme.dart';

class EmojiSelectSheet extends ConsumerWidget {
  const EmojiSelectSheet({
    Key? key,
  }) : super(key: key);

  final double horizontalPadding = 24;
  final double emojiSize = 24;
  final double minimumEmojiSpacing = 25;

  @override
  Widget build(BuildContext context, WidgetRef ref) {
    final size = MediaQuery.of(context).size;
    final double maxHeight = size.height * 0.60;
    final double availableWidth = size.width - (2 * horizontalPadding);
    final int emojisPerRow =
        ((availableWidth - emojiSize) ~/ (emojiSize + minimumEmojiSpacing)) + 1;

    final itemCount = Emoji.all().length;

    return Container(
      decoration: BoxDecoration(
        color: StackTheme.instance.color.popupBG,
        borderRadius: const BorderRadius.vertical(
          top: Radius.circular(20),
        ),
      ),
      child: LimitedBox(
        maxHeight: maxHeight,
        child: Padding(
          padding: EdgeInsets.only(
            left: horizontalPadding,
            right: horizontalPadding,
            top: 10,
            bottom: 0,
          ),
          child: Column(
            mainAxisSize: MainAxisSize.min,
            crossAxisAlignment: CrossAxisAlignment.stretch,
            children: [
              Center(
                child: Container(
                  decoration: BoxDecoration(
                    color: StackTheme.instance.color.textFieldDefaultBG,
                    borderRadius: BorderRadius.circular(
                      Constants.size.circularBorderRadius,
                    ),
                  ),
                  width: 60,
                  height: 4,
                ),
              ),
              const SizedBox(
                height: 36,
              ),
              Text(
                "Select emoji",
                style: STextStyles.pageTitleH2,
                textAlign: TextAlign.left,
              ),
              const SizedBox(
                height: 16,
              ),
              Flexible(
                child: Row(
                  mainAxisAlignment: MainAxisAlignment.center,
                  children: [
                    Flexible(
                      child: GridView.builder(
                        itemCount: itemCount,
                        gridDelegate: SliverGridDelegateWithFixedCrossAxisCount(
                          crossAxisCount: emojisPerRow,
                        ),
                        itemBuilder: (context, index) {
                          final emoji = Emoji.all()[index];
                          return GestureDetector(
                            onTap: () {
                              Navigator.of(context).pop(emoji);
                            },
                            child: Container(
                              decoration: BoxDecoration(
                                borderRadius: BorderRadius.circular(100),
                                color: Colors.transparent,
                              ),
                              child: Padding(
                                padding: const EdgeInsets.all(8.0),
                                child: Text(emoji.char),
                              ),
                            ),
                          );
                        },
                      ),
                    )
                  ],
                ),
              ),
              const SizedBox(
                height: 24,
              ),
            ],
          ),
        ),
      ),
    );
  }
}