flutter_colorpicker 0.4.0-nullsafety.0

A HSV(HSB)/HSL color picker inspired by chrome devtools and a material color picker for your flutter app.

example/lib/main.dart

import 'package:flutter/material.dart';
// import 'package:flutter/foundation.dart'
//     show debugDefaultTargetPlatformOverride;

import 'package:flutter_colorpicker/flutter_colorpicker.dart';

void main() {
  // debugDefaultTargetPlatformOverride = TargetPlatform.fuchsia;
  runApp(MaterialApp(home: MyApp()));
}

class MyApp extends StatefulWidget {
  @override
  State<StatefulWidget> createState() => _MyAppState();
}

class _MyAppState extends State<MyApp> {
  bool lightTheme = true;
  Color currentColor = Colors.limeAccent;
  List<Color> currentColors = [Colors.limeAccent, Colors.green];

  void changeColor(Color color) => setState(() => currentColor = color);
  void changeColors(List<Color> colors) => setState(() => currentColors = colors);

  @override
  Widget build(BuildContext context) {
    return Theme(
      data: lightTheme ? ThemeData.light() : ThemeData.dark(),
      child: DefaultTabController(
        length: 3,
        child: Scaffold(
          appBar: AppBar(
            title: GestureDetector(
              child: Text('Flutter Color Picker Example'),
              onDoubleTap: () => setState(() => lightTheme = !lightTheme),
            ),
            bottom: TabBar(
              tabs: <Widget>[
                const Tab(text: 'HSV'),
                const Tab(text: 'Material'),
                const Tab(text: 'Block'),
              ],
            ),
          ),
          body: TabBarView(
            physics: const NeverScrollableScrollPhysics(),
            children: <Widget>[
              Column(
                mainAxisAlignment: MainAxisAlignment.center,
                children: <Widget>[
                  RaisedButton(
                    elevation: 3.0,
                    onPressed: () {
                      showDialog(
                        context: context,
                        builder: (BuildContext context) {
                          return AlertDialog(
                            titlePadding: const EdgeInsets.all(0.0),
                            contentPadding: const EdgeInsets.all(0.0),
                            content: SingleChildScrollView(
                              child: ColorPicker(
                                pickerColor: currentColor,
                                onColorChanged: changeColor,
                                colorPickerWidth: 300.0,
                                pickerAreaHeightPercent: 0.7,
                                enableAlpha: true,
                                displayThumbColor: true,
                                showLabel: true,
                                paletteType: PaletteType.hsv,
                                pickerAreaBorderRadius: const BorderRadius.only(
                                  topLeft: const Radius.circular(2.0),
                                  topRight: const Radius.circular(2.0),
                                ),
                              ),
                            ),
                          );
                        },
                      );
                    },
                    child: const Text('Change me'),
                    color: currentColor,
                    textColor: useWhiteForeground(currentColor)
                        ? const Color(0xffffffff)
                        : const Color(0xff000000),
                  ),
                  RaisedButton(
                    elevation: 3.0,
                    onPressed: () {
                      showDialog(
                        context: context,
                        builder: (BuildContext context) {
                          return AlertDialog(
                            titlePadding: const EdgeInsets.all(0.0),
                            contentPadding: const EdgeInsets.all(0.0),
                            shape: RoundedRectangleBorder(
                              borderRadius: BorderRadius.circular(25.0),
                            ),
                            content: SingleChildScrollView(
                              child: SlidePicker(
                                pickerColor: currentColor,
                                onColorChanged: changeColor,
                                paletteType: PaletteType.rgb,
                                enableAlpha: false,
                                displayThumbColor: true,
                                showLabel: false,
                                showIndicator: true,
                                indicatorBorderRadius:
                                const BorderRadius.vertical(
                                  top: const Radius.circular(25.0),
                                ),
                              ),
                            ),
                          );
                        },
                      );
                    },
                    child: const Text('Change me again'),
                    color: currentColor,
                    textColor: useWhiteForeground(currentColor)
                        ? const Color(0xffffffff)
                        : const Color(0xff000000),
                  ),
                ],
              ),
              Center(
                child: RaisedButton(
                  elevation: 3.0,
                  onPressed: () {
                    showDialog(
                      context: context,
                      builder: (BuildContext context) {
                        return AlertDialog(
                          titlePadding: const EdgeInsets.all(0.0),
                          contentPadding: const EdgeInsets.all(0.0),
                          content: SingleChildScrollView(
                            child: MaterialPicker(
                              pickerColor: currentColor,
                              onColorChanged: changeColor,
                              enableLabel: true,
                            ),
                          ),
                        );
                      },
                    );
                  },
                  child: const Text('Change me'),
                  color: currentColor,
                  textColor: useWhiteForeground(currentColor)
                      ? const Color(0xffffffff)
                      : const Color(0xff000000),
                ),
              ),
              Center(
                child: Column(
                    mainAxisAlignment: MainAxisAlignment.center,
                    children: <Widget>[
                      RaisedButton(
                        elevation: 3.0,
                        onPressed: () {
                          showDialog(
                            context: context,
                            builder: (BuildContext context) {
                              return AlertDialog(
                                title: Text('Select a color'),
                                content: SingleChildScrollView(
                                  child: BlockPicker(
                                    pickerColor: currentColor,
                                    onColorChanged: changeColor,
                                  ),
                                ),
                              );
                            },
                          );
                        },
                        child: const Text('Change me'),
                        color: currentColor,
                        textColor: useWhiteForeground(currentColor)
                            ? const Color(0xffffffff)
                            : const Color(0xff000000),
                      ),
                      RaisedButton(
                        elevation: 3.0,
                        onPressed: () {
                          showDialog(
                            context: context,
                            builder: (BuildContext context) {
                              return AlertDialog(
                                title: Text('Select colors'),
                                content: SingleChildScrollView(
                                  child: MultipleChoiceBlockPicker(
                                    pickerColors: currentColors,
                                    onColorsChanged: changeColors,
                                  ),
                                ),
                              );
                            },
                          );
                        },
                        child: const Text('Change me again'),
                        color: currentColor,
                        textColor: useWhiteForeground(currentColor)
                            ? const Color(0xffffffff)
                            : const Color(0xff000000),
                      )
                    ]
                ),
              ),
            ],
          ),
        ),
      ),
    );
  }
}