WIP #212 Light card support

lib/cards/card_widget.dart

@@ -62,6 +62,10 @@ class CardWidget extends StatelessWidget {
         return _buildGaugeCard(context);
       }
 
+      case CardType.LIGHT: {
+        return _buildLightCard(context);
+      }
+
       case CardType.MARKDOWN: {
         return _buildMarkdownCard(context);
       }
@@ -306,6 +310,22 @@ class CardWidget extends StatelessWidget {
     );
   }
 
+  Widget _buildLightCard(BuildContext context) {
+    card.linkedEntityWrapper.displayName = card.name ??
+        card.linkedEntityWrapper.displayName;
+    return Card(
+        child: EntityModel(
+            entityWrapper: card.linkedEntityWrapper,
+            child: LightCardBody(
+              min: card.min,
+              max: card.max,
+              severity: card.severity,
+            ),
+            handleTap: true
+        )
+    );
+  }
+
   Widget _buildUnsupportedCard(BuildContext context) {
     List<Widget> body = [];
     body.add(CardHeader(name: card.name ?? ""));

lib/cards/widgets/light_card_body.dart

@@ -0,0 +1,90 @@
+part of '../../main.dart';
+
+class LightCardBody extends StatefulWidget {
+
+  final int min;
+  final int max;
+  final Map severity;
+
+  LightCardBody({Key key, this.min, this.max, this.severity}) : super(key: key);
+
+  @override
+  _LightCardBodyState createState() => _LightCardBodyState();
+}
+
+class _LightCardBodyState extends State<LightCardBody> {
+
+  @override
+  Widget build(BuildContext context) {
+    EntityWrapper entityWrapper = EntityModel.of(context).entityWrapper;
+    LightEntity entity = entityWrapper.entity;
+    Logger.d("Light brightness: ${entity.brightness}");
+
+    return FractionallySizedBox(
+      widthFactor: 0.5,
+      child: Container(
+        //color: Colors.redAccent,
+        child: SingleCircularSlider(
+            255,
+            entity.brightness ?? 0,
+          baseColor: Colors.white,
+          handlerColor: Colors.blue[200],
+          selectionColor: Colors.blue[100],
+        ),
+      ),
+    );
+
+    return InkWell(
+      onTap: () => entityWrapper.handleTap(),
+      onLongPress: () => entityWrapper.handleHold(),
+      child: AspectRatio(
+          aspectRatio: 1.5,
+          child: Stack(
+              fit: StackFit.expand,
+              overflow: Overflow.clip,
+              children: [
+                Align(
+                  alignment: Alignment.bottomCenter,
+                  child: LayoutBuilder(
+                      builder: (BuildContext context, BoxConstraints constraints) {
+                        double fontSize = constraints.maxHeight / 7;
+                        return Padding(
+                          padding: EdgeInsets.only(bottom: 2*fontSize),
+                          child: SimpleEntityState(
+                            //textAlign: TextAlign.center,
+                            expanded: false,
+                            maxLines: 1,
+                            bold: true,
+                            textAlign: TextAlign.center,
+                            padding: EdgeInsets.all(0.0),
+                            fontSize: fontSize,
+                            //padding: EdgeInsets.only(top: Sizes.rowPadding),
+                          ),
+                        );
+                      }
+                  ),
+                ),
+                Align(
+                  alignment: Alignment.bottomCenter,
+                  child: LayoutBuilder(
+                      builder: (BuildContext context, BoxConstraints constraints) {
+                        double fontSize = constraints.maxHeight / 7;
+                        return Padding(
+                          padding: EdgeInsets.only(bottom: fontSize),
+                          child: EntityName(
+                            fontSize: fontSize,
+                            maxLines: 1,
+                            padding: EdgeInsets.all(0.0),
+                            textAlign: TextAlign.center,
+                            textOverflow: TextOverflow.ellipsis,
+                          ),
+                        );
+                      }
+                  ),
+                )
+              ]
+          )
+      ),
+    );
+  }
+}

lib/const.dart

@@ -96,6 +96,7 @@ class CardType {
   static const CONDITIONAL = "conditional";
   static const ALARM_PANEL = "alarm-panel";
   static const MARKDOWN = "markdown";
+  static const LIGHT = "light";
 }
 
 class Sizes {

lib/main.dart

@@ -22,7 +22,9 @@ import 'package:flutter_secure_storage/flutter_secure_storage.dart';
 import 'package:device_info/device_info.dart';
 import 'package:flutter_local_notifications/flutter_local_notifications.dart';
 import 'package:in_app_purchase/in_app_purchase.dart';
-import 'package:auto_size_text/auto_size_text.dart';
+import 'plugins/circular_slider/single_circular_slider.dart';
+
+import 'utils/logger.dart';
 
 part 'const.dart';
 part 'utils/launcher.dart';
@@ -115,10 +117,10 @@ part 'cards/card_widget.dart';
 part 'cards/widgets/card_header.widget.dart';
 part 'panels/config_panel_widget.dart';
 part 'panels/widgets/link_to_web_config.dart';
-part 'utils/logger.dart';
 part 'types/ha_error.dart';
 part 'types/event_bus_events.dart';
 part 'cards/widgets/gauge_card_body.dart';
+part 'cards/widgets/light_card_body.dart';
 
 
 EventBus eventBus = new EventBus();

lib/plugins/circular_slider/base_painter.dart

@@ -0,0 +1,77 @@
+import 'dart:math';
+
+import 'package:flutter/material.dart';
+
+import 'utils.dart';
+
+class BasePainter extends CustomPainter {
+  Color baseColor;
+  Color selectionColor;
+  int primarySectors;
+  int secondarySectors;
+  double sliderStrokeWidth;
+
+  Offset center;
+  double radius;
+
+  BasePainter({
+    @required this.baseColor,
+    @required this.selectionColor,
+    @required this.primarySectors,
+    @required this.secondarySectors,
+    @required this.sliderStrokeWidth,
+  });
+
+  @override
+  void paint(Canvas canvas, Size size) {
+    Paint base = _getPaint(color: baseColor);
+
+    center = Offset(size.width / 2, size.height / 2);
+    radius = min(size.width / 2, size.height / 2) - sliderStrokeWidth;
+    // we need this in the parent to calculate if the user clicks on the circumference
+
+    assert(radius > 0);
+
+    canvas.drawCircle(center, radius, base);
+
+    if (primarySectors > 0) {
+      _paintSectors(primarySectors, 8.0, selectionColor, canvas);
+    }
+
+    if (secondarySectors > 0) {
+      _paintSectors(secondarySectors, 6.0, baseColor, canvas);
+    }
+  }
+
+  void _paintSectors(
+      int sectors, double radiusPadding, Color color, Canvas canvas) {
+    Paint section = _getPaint(color: color, width: 2.0);
+
+    var endSectors =
+    getSectionsCoordinatesInCircle(center, radius + radiusPadding, sectors);
+    var initSectors =
+    getSectionsCoordinatesInCircle(center, radius - radiusPadding, sectors);
+    _paintLines(canvas, initSectors, endSectors, section);
+  }
+
+  void _paintLines(
+      Canvas canvas, List<Offset> inits, List<Offset> ends, Paint section) {
+    assert(inits.length == ends.length && inits.length > 0);
+
+    for (var i = 0; i < inits.length; i++) {
+      canvas.drawLine(inits[i], ends[i], section);
+    }
+  }
+
+  Paint _getPaint({@required Color color, double width, PaintingStyle style}) =>
+      Paint()
+        ..color = color
+        ..strokeCap = StrokeCap.round
+        ..style = style ?? PaintingStyle.stroke
+        ..strokeWidth = width ?? sliderStrokeWidth;
+
+  @override
+  bool shouldRepaint(CustomPainter oldDelegate) {
+    return false;
+  }
+}

lib/plugins/circular_slider/circular_slider_paint.dart

@@ -0,0 +1,366 @@
+import 'package:flutter/gestures.dart';
+import 'package:flutter/material.dart';
+
+import 'base_painter.dart';
+import 'slider_painter.dart';
+import 'utils.dart';
+
+enum CircularSliderMode { singleHandler, doubleHandler }
+
+enum SlidingState { none, endIsBiggerThanStart, endIsSmallerThanStart }
+
+typedef SelectionChanged<T> = void Function(T a, T b, T c);
+
+class CircularSliderPaint extends StatefulWidget {
+  final CircularSliderMode mode;
+  final int init;
+  final int end;
+  final int divisions;
+  final int primarySectors;
+  final int secondarySectors;
+  final SelectionChanged<int> onSelectionChange;
+  final SelectionChanged<int> onSelectionEnd;
+  final Color baseColor;
+  final Color selectionColor;
+  final Color handlerColor;
+  final double handlerOutterRadius;
+  final Widget child;
+  final bool showRoundedCapInSelection;
+  final bool showHandlerOutter;
+  final double sliderStrokeWidth;
+  final bool shouldCountLaps;
+
+  CircularSliderPaint({
+    @required this.mode,
+    @required this.divisions,
+    @required this.init,
+    @required this.end,
+    this.child,
+    @required this.primarySectors,
+    @required this.secondarySectors,
+    @required this.onSelectionChange,
+    @required this.onSelectionEnd,
+    @required this.baseColor,
+    @required this.selectionColor,
+    @required this.handlerColor,
+    @required this.handlerOutterRadius,
+    @required this.showRoundedCapInSelection,
+    @required this.showHandlerOutter,
+    @required this.sliderStrokeWidth,
+    @required this.shouldCountLaps,
+  });
+
+  @override
+  _CircularSliderState createState() => _CircularSliderState();
+}
+
+class _CircularSliderState extends State<CircularSliderPaint> {
+  bool _isInitHandlerSelected = false;
+  bool _isEndHandlerSelected = false;
+
+  SliderPainter _painter;
+
+  /// start angle in radians where we need to locate the init handler
+  double _startAngle;
+
+  /// end angle in radians where we need to locate the end handler
+  double _endAngle;
+
+  /// the absolute angle in radians representing the selection
+  double _sweepAngle;
+
+  /// in case we have a double slider and we want to move the whole selection by clicking in the slider
+  /// this will capture the position in the selection relative to the initial handler
+  /// that way we will be able to keep the selection constant when moving
+  int _differenceFromInitPoint;
+
+  /// will store the number of full laps (2pi radians) as part of the selection
+  int _laps = 0;
+
+  /// will be used to calculate in the next movement if we need to increase or decrease _laps
+  SlidingState _slidingState = SlidingState.none;
+
+  bool get isDoubleHandler => widget.mode == CircularSliderMode.doubleHandler;
+
+  bool get isSingleHandler => widget.mode == CircularSliderMode.singleHandler;
+
+  bool get isBothHandlersSelected =>
+      _isEndHandlerSelected && _isInitHandlerSelected;
+
+  bool get isNoHandlersSelected =>
+      !_isEndHandlerSelected && !_isInitHandlerSelected;
+
+  @override
+  void initState() {
+    super.initState();
+    _calculatePaintData();
+  }
+
+  // we need to update this widget both with gesture detector but
+  // also when the parent widget rebuilds itself
+  @override
+  void didUpdateWidget(CircularSliderPaint oldWidget) {
+    super.didUpdateWidget(oldWidget);
+    if (oldWidget.init != widget.init || oldWidget.end != widget.end) {
+      _calculatePaintData();
+    }
+  }
+
+  @override
+  Widget build(BuildContext context) {
+    return RawGestureDetector(
+      gestures: <Type, GestureRecognizerFactory>{
+        CustomPanGestureRecognizer:
+        GestureRecognizerFactoryWithHandlers<CustomPanGestureRecognizer>(
+              () => CustomPanGestureRecognizer(
+            onPanDown: _onPanDown,
+            onPanUpdate: _onPanUpdate,
+            onPanEnd: _onPanEnd,
+          ),
+              (CustomPanGestureRecognizer instance) {},
+        ),
+      },
+      child: CustomPaint(
+        painter: BasePainter(
+          baseColor: widget.baseColor,
+          selectionColor: widget.selectionColor,
+          primarySectors: widget.primarySectors,
+          secondarySectors: widget.secondarySectors,
+          sliderStrokeWidth: widget.sliderStrokeWidth,
+        ),
+        foregroundPainter: _painter,
+        child: Padding(
+          padding: const EdgeInsets.all(12.0),
+          child: widget.child,
+        ),
+      ),
+    );
+  }
+
+  void _calculatePaintData() {
+    var initPercent = isDoubleHandler
+        ? valueToPercentage(widget.init, widget.divisions)
+        : 0.0;
+    var endPercent = valueToPercentage(widget.end, widget.divisions);
+    var sweep = getSweepAngle(initPercent, endPercent);
+
+    var previousStartAngle = _startAngle;
+    var previousEndAngle = _endAngle;
+
+    _startAngle = isDoubleHandler ? percentageToRadians(initPercent) : 0.0;
+    _endAngle = percentageToRadians(endPercent);
+    _sweepAngle = percentageToRadians(sweep.abs());
+
+    // update full laps if need be
+    if (widget.shouldCountLaps) {
+      var newSlidingState = _calculateSlidingState(_startAngle, _endAngle);
+      if (isSingleHandler) {
+        _laps = _calculateLapsForsSingleHandler(
+            _endAngle, previousEndAngle, _slidingState, _laps);
+        _slidingState = newSlidingState;
+      } else {
+        // is double handler
+        if (newSlidingState != _slidingState) {
+          _laps = _calculateLapsForDoubleHandler(
+              _startAngle,
+              _endAngle,
+              previousStartAngle,
+              previousEndAngle,
+              _slidingState,
+              newSlidingState,
+              _laps);
+          _slidingState = newSlidingState;
+        }
+      }
+    }
+
+    _painter = SliderPainter(
+      mode: widget.mode,
+      startAngle: _startAngle,
+      endAngle: _endAngle,
+      sweepAngle: _sweepAngle,
+      selectionColor: widget.selectionColor,
+      handlerColor: widget.handlerColor,
+      handlerOutterRadius: widget.handlerOutterRadius,
+      showRoundedCapInSelection: widget.showRoundedCapInSelection,
+      showHandlerOutter: widget.showHandlerOutter,
+      sliderStrokeWidth: widget.sliderStrokeWidth,
+    );
+  }
+
+  int _calculateLapsForsSingleHandler(
+      double end, double prevEnd, SlidingState slidingState, int laps) {
+    if (slidingState != SlidingState.none) {
+      if (radiansWasModuloed(end, prevEnd)) {
+        var lapIncrement = end < prevEnd ? 1 : -1;
+        var newLaps = laps + lapIncrement;
+        return newLaps < 0 ? 0 : newLaps;
+      }
+    }
+    return laps;
+  }
+
+  int _calculateLapsForDoubleHandler(
+      double start,
+      double end,
+      double prevStart,
+      double prevEnd,
+      SlidingState slidingState,
+      SlidingState newSlidingState,
+      int laps) {
+    if (slidingState != SlidingState.none) {
+      if (!radiansWasModuloed(start, prevStart) &&
+          !radiansWasModuloed(end, prevEnd)) {
+        var lapIncrement =
+        newSlidingState == SlidingState.endIsBiggerThanStart ? 1 : -1;
+        var newLaps = laps + lapIncrement;
+        return newLaps < 0 ? 0 : newLaps;
+      }
+    }
+    return laps;
+  }
+
+  SlidingState _calculateSlidingState(double start, double end) {
+    return end > start
+        ? SlidingState.endIsBiggerThanStart
+        : SlidingState.endIsSmallerThanStart;
+  }
+
+  void _onPanUpdate(Offset details) {
+    if (!_isInitHandlerSelected && !_isEndHandlerSelected) {
+      return;
+    }
+    if (_painter.center == null) {
+      return;
+    }
+    _handlePan(details, false);
+  }
+
+  void _onPanEnd(Offset details) {
+    _handlePan(details, true);
+
+    _isInitHandlerSelected = false;
+    _isEndHandlerSelected = false;
+  }
+
+  void _handlePan(Offset details, bool isPanEnd) {
+    RenderBox renderBox = context.findRenderObject();
+    var position = renderBox.globalToLocal(details);
+
+    var angle = coordinatesToRadians(_painter.center, position);
+    var percentage = radiansToPercentage(angle);
+    var newValue = percentageToValue(percentage, widget.divisions);
+
+    if (isBothHandlersSelected) {
+      var newValueInit =
+          (newValue - _differenceFromInitPoint) % widget.divisions;
+      if (newValueInit != widget.init) {
+        var newValueEnd =
+            (widget.end + (newValueInit - widget.init)) % widget.divisions;
+        widget.onSelectionChange(newValueInit, newValueEnd, _laps);
+        if (isPanEnd) {
+          widget.onSelectionEnd(newValueInit, newValueEnd, _laps);
+        }
+      }
+      return;
+    }
+
+    // isDoubleHandler but one handler was selected
+    if (_isInitHandlerSelected) {
+      widget.onSelectionChange(newValue, widget.end, _laps);
+      if (isPanEnd) {
+        widget.onSelectionEnd(newValue, widget.end, _laps);
+      }
+    } else {
+      widget.onSelectionChange(widget.init, newValue, _laps);
+      if (isPanEnd) {
+        widget.onSelectionEnd(widget.init, newValue, _laps);
+      }
+    }
+  }
+
+  bool _onPanDown(Offset details) {
+    if (_painter == null) {
+      return false;
+    }
+    RenderBox renderBox = context.findRenderObject();
+    var position = renderBox.globalToLocal(details);
+
+    if (position == null) {
+      return false;
+    }
+
+    if (isSingleHandler) {
+      if (isPointAlongCircle(position, _painter.center, _painter.radius)) {
+        _isEndHandlerSelected = true;
+        _onPanUpdate(details);
+      }
+    } else {
+      _isInitHandlerSelected = isPointInsideCircle(
+          position, _painter.initHandler, widget.handlerOutterRadius);
+
+      if (!_isInitHandlerSelected) {
+        _isEndHandlerSelected = isPointInsideCircle(
+            position, _painter.endHandler, widget.handlerOutterRadius);
+      }
+
+      if (isNoHandlersSelected) {
+        // we check if the user pressed in the selection in a double handler slider
+        // that means the user wants to move the selection as a whole
+        if (isPointAlongCircle(position, _painter.center, _painter.radius)) {
+          var angle = coordinatesToRadians(_painter.center, position);
+          if (isAngleInsideRadiansSelection(angle, _startAngle, _sweepAngle)) {
+            _isEndHandlerSelected = true;
+            _isInitHandlerSelected = true;
+            var positionPercentage = radiansToPercentage(angle);
+
+            // no need to account for negative values, that will be sorted out in the onPanUpdate
+            _differenceFromInitPoint =
+                percentageToValue(positionPercentage, widget.divisions) -
+                    widget.init;
+          }
+        }
+      }
+    }
+    return _isInitHandlerSelected || _isEndHandlerSelected;
+  }
+}
+
+class CustomPanGestureRecognizer extends OneSequenceGestureRecognizer {
+  final Function onPanDown;
+  final Function onPanUpdate;
+  final Function onPanEnd;
+
+  CustomPanGestureRecognizer({
+    @required this.onPanDown,
+    @required this.onPanUpdate,
+    @required this.onPanEnd,
+  });
+
+  @override
+  void addPointer(PointerEvent event) {
+    if (onPanDown(event.position)) {
+      startTrackingPointer(event.pointer);
+      resolve(GestureDisposition.accepted);
+    } else {
+      stopTrackingPointer(event.pointer);
+    }
+  }
+
+  @override
+  void handleEvent(PointerEvent event) {
+    if (event is PointerMoveEvent) {
+      onPanUpdate(event.position);
+    }
+    if (event is PointerUpEvent) {
+      onPanEnd(event.position);
+      stopTrackingPointer(event.pointer);
+    }
+  }
+
+  @override
+  String get debugDescription => 'customPan';
+
+  @override
+  void didStopTrackingLastPointer(int pointer) {}
+}

lib/plugins/circular_slider/double_circular_slider.dart

@@ -0,0 +1,148 @@
+import 'package:flutter/material.dart';
+
+import 'circular_slider_paint.dart';
+
+/// Returns a widget which displays a circle to be used as a slider.
+///
+/// Required arguments are init and end to set the initial selection.
+/// onSelectionChange is a callback function which returns new values as the user
+/// changes the interval.
+/// The rest of the params are used to change the look and feel.
+///
+///     DoubleCircularSlider(5, 10, onSelectionChange: () => {});
+class DoubleCircularSlider extends StatefulWidget {
+  /// the selection will be values between 0..divisions; max value is 300
+  final int divisions;
+
+  /// the initial value in the selection
+  final int init;
+
+  /// the end value in the selection
+  final int end;
+
+  /// the number of primary sectors to be painted
+  /// will be painted using selectionColor
+  final int primarySectors;
+
+  /// the number of secondary sectors to be painted
+  /// will be painted using baseColor
+  final int secondarySectors;
+
+  /// an optional widget that would be mounted inside the circle
+  final Widget child;
+
+  /// height of the canvas, default at 220
+  final double height;
+
+  /// width of the canvas, default at 220
+  final double width;
+
+  /// color of the base circle and sections
+  final Color baseColor;
+
+  /// color of the selection
+  final Color selectionColor;
+
+  /// color of the handlers
+  final Color handlerColor;
+
+  /// callback function when init and end change
+  /// (int init, int end) => void
+  final SelectionChanged<int> onSelectionChange;
+
+  /// callback function when init and end finish
+  /// (int init, int end) => void
+  final SelectionChanged<int> onSelectionEnd;
+
+  /// outter radius for the handlers
+  final double handlerOutterRadius;
+
+  /// if true an extra handler ring will be displayed in the handler
+  final bool showHandlerOutter;
+
+  /// stroke width for the slider, defaults at 12.0
+  final double sliderStrokeWidth;
+
+  /// if true, the onSelectionChange will also return the number of laps in the slider
+  /// otherwise, everytime the user completes a full lap, the selection restarts from 0
+  final bool shouldCountLaps;
+
+  DoubleCircularSlider(
+      this.divisions,
+      this.init,
+      this.end, {
+        this.height,
+        this.width,
+        this.child,
+        this.primarySectors,
+        this.secondarySectors,
+        this.baseColor,
+        this.selectionColor,
+        this.handlerColor,
+        this.onSelectionChange,
+        this.onSelectionEnd,
+        this.handlerOutterRadius,
+        this.showHandlerOutter,
+        this.sliderStrokeWidth,
+        this.shouldCountLaps,
+      })  : assert(init >= 0 && init <= divisions,
+  'init has to be > 0 and < divisions value'),
+        assert(end >= 0 && end <= divisions,
+        'end has to be > 0 and < divisions value'),
+        assert(divisions >= 0 && divisions <= 300,
+        'divisions has to be > 0 and <= 300');
+
+  @override
+  _DoubleCircularSliderState createState() => _DoubleCircularSliderState();
+}
+
+class _DoubleCircularSliderState extends State<DoubleCircularSlider> {
+  int _init;
+  int _end;
+
+  @override
+  void initState() {
+    super.initState();
+    _init = widget.init;
+    _end = widget.end;
+  }
+
+  @override
+  Widget build(BuildContext context) {
+    return Container(
+        height: widget.height ?? 220,
+        width: widget.width ?? 220,
+        child: CircularSliderPaint(
+          mode: CircularSliderMode.doubleHandler,
+          init: _init,
+          end: _end,
+          divisions: widget.divisions,
+          primarySectors: widget.primarySectors ?? 0,
+          secondarySectors: widget.secondarySectors ?? 0,
+          child: widget.child,
+          onSelectionChange: (newInit, newEnd, laps) {
+            if (widget.onSelectionChange != null) {
+              widget.onSelectionChange(newInit, newEnd, laps);
+            }
+            setState(() {
+              _init = newInit;
+              _end = newEnd;
+            });
+          },
+          onSelectionEnd: (newInit, newEnd, laps) {
+            if (widget.onSelectionEnd != null) {
+              widget.onSelectionEnd(newInit, newEnd, laps);
+            }
+          },
+          sliderStrokeWidth: widget.sliderStrokeWidth ?? 12.0,
+          baseColor: widget.baseColor ?? Color.fromRGBO(255, 255, 255, 0.1),
+          selectionColor:
+          widget.selectionColor ?? Color.fromRGBO(255, 255, 255, 0.3),
+          handlerColor: widget.handlerColor ?? Colors.white,
+          handlerOutterRadius: widget.handlerOutterRadius ?? 12.0,
+          showRoundedCapInSelection: false,
+          showHandlerOutter: widget.showHandlerOutter ?? true,
+          shouldCountLaps: widget.shouldCountLaps ?? false,
+        ));
+  }
+}

lib/plugins/circular_slider/single_circular_slider.dart

@@ -0,0 +1,147 @@
+import 'package:flutter/material.dart';
+
+import 'circular_slider_paint.dart';
+
+import '../../utils/logger.dart';
+
+/// Returns a widget which displays a circle to be used as a slider.
+///
+/// Required arguments are position and divisions to set the initial selection.
+/// onSelectionChange is a callback function which returns new values as the user
+/// changes the interval.
+/// The rest of the params are used to change the look and feel.
+///
+///     SingleCircularSlider(5, 10, onSelectionChange: () => {});
+class SingleCircularSlider extends StatefulWidget {
+  /// the selection will be values between 0..divisions; max value is 300
+  final int divisions;
+
+  /// the initial value in the selection
+  int position;
+
+  /// the number of primary sectors to be painted
+  /// will be painted using selectionColor
+  final int primarySectors;
+
+  /// the number of secondary sectors to be painted
+  /// will be painted using baseColor
+  final int secondarySectors;
+
+  /// an optional widget that would be mounted inside the circle
+  final Widget child;
+
+  /// height of the canvas, default at 220
+  final double height;
+
+  /// width of the canvas, default at 220
+  final double width;
+
+  /// color of the base circle and sections
+  final Color baseColor;
+
+  /// color of the selection
+  final Color selectionColor;
+
+  /// color of the handlers
+  final Color handlerColor;
+
+  /// callback function when init and end change
+  /// (int init, int end) => void
+  final SelectionChanged<int> onSelectionChange;
+
+  /// callback function when init and end finish
+  /// (int init, int end) => void
+  final SelectionChanged<int> onSelectionEnd;
+
+  /// outter radius for the handlers
+  final double handlerOutterRadius;
+
+  /// if true will paint a rounded cap in the selection slider start
+  final bool showRoundedCapInSelection;
+
+  /// if true an extra handler ring will be displayed in the handler
+  final bool showHandlerOutter;
+
+  /// stroke width for the slider, defaults at 12.0
+  final double sliderStrokeWidth;
+
+  /// if true, the onSelectionChange will also return the number of laps in the slider
+  /// otherwise, everytime the user completes a full lap, the selection restarts from 0
+  final bool shouldCountLaps;
+
+  SingleCircularSlider(
+      this.divisions,
+      this.position, {
+        this.height,
+        this.width,
+        this.child,
+        this.primarySectors,
+        this.secondarySectors,
+        this.baseColor,
+        this.selectionColor,
+        this.handlerColor,
+        this.onSelectionChange,
+        this.onSelectionEnd,
+        this.handlerOutterRadius,
+        this.showRoundedCapInSelection,
+        this.showHandlerOutter,
+        this.sliderStrokeWidth,
+        this.shouldCountLaps,
+      })  : assert(position >= 0 && position <= divisions,
+  'init has to be > 0 and < divisions value'),
+        assert(divisions >= 0 && divisions <= 300,
+        'divisions has to be > 0 and <= 300');
+
+  @override
+  _SingleCircularSliderState createState() => _SingleCircularSliderState();
+}
+
+class _SingleCircularSliderState extends State<SingleCircularSlider> {
+  int _end;
+
+  @override
+  void initState() {
+    super.initState();
+    _end = widget.position;
+    Logger.d('Init: _end=$_end');
+  }
+
+  @override
+  Widget build(BuildContext context) {
+    Logger.d('Build: _end=$_end');
+    return Container(
+        height: widget.height ?? 220,
+        width: widget.width ?? 220,
+        child: CircularSliderPaint(
+          mode: CircularSliderMode.singleHandler,
+          init: 0,
+          end: _end,
+          divisions: widget.divisions,
+          primarySectors: widget.primarySectors ?? 0,
+          secondarySectors: widget.secondarySectors ?? 0,
+          child: widget.child,
+          onSelectionChange: (newInit, newEnd, laps) {
+            if (widget.onSelectionChange != null) {
+              widget.onSelectionChange(newInit, newEnd, laps);
+            }
+            setState(() {
+              _end = newEnd;
+            });
+          },
+          onSelectionEnd: (newInit, newEnd, laps) {
+            if (widget.onSelectionEnd != null) {
+              widget.onSelectionEnd(newInit, newEnd, laps);
+            }
+          },
+          sliderStrokeWidth: widget.sliderStrokeWidth ?? 12.0,
+          baseColor: widget.baseColor ?? Color.fromRGBO(255, 255, 255, 0.1),
+          selectionColor:
+          widget.selectionColor ?? Color.fromRGBO(255, 255, 255, 0.3),
+          handlerColor: widget.handlerColor ?? Colors.white,
+          handlerOutterRadius: widget.handlerOutterRadius ?? 12.0,
+          showRoundedCapInSelection: widget.showRoundedCapInSelection ?? false,
+          showHandlerOutter: widget.showHandlerOutter ?? true,
+          shouldCountLaps: widget.shouldCountLaps ?? false,
+        ));
+  }
+}

lib/plugins/circular_slider/slider_painter.dart

@@ -0,0 +1,77 @@
+import 'dart:math';
+
+import 'package:flutter/material.dart';
+
+import 'circular_slider_paint.dart' show CircularSliderMode;
+import 'utils.dart';
+
+class SliderPainter extends CustomPainter {
+  CircularSliderMode mode;
+  double startAngle;
+  double endAngle;
+  double sweepAngle;
+  Color selectionColor;
+  Color handlerColor;
+  double handlerOutterRadius;
+  bool showRoundedCapInSelection;
+  bool showHandlerOutter;
+  double sliderStrokeWidth;
+
+  Offset initHandler;
+  Offset endHandler;
+  Offset center;
+  double radius;
+
+  SliderPainter({
+    @required this.mode,
+    @required this.startAngle,
+    @required this.endAngle,
+    @required this.sweepAngle,
+    @required this.selectionColor,
+    @required this.handlerColor,
+    @required this.handlerOutterRadius,
+    @required this.showRoundedCapInSelection,
+    @required this.showHandlerOutter,
+    @required this.sliderStrokeWidth,
+  });
+
+  @override
+  void paint(Canvas canvas, Size size) {
+    Paint progress = _getPaint(color: selectionColor);
+
+    center = Offset(size.width / 2, size.height / 2);
+    radius = min(size.width / 2, size.height / 2) - sliderStrokeWidth;
+
+    canvas.drawArc(Rect.fromCircle(center: center, radius: radius),
+        -pi / 2 + startAngle, sweepAngle, false, progress);
+
+    Paint handler = _getPaint(color: handlerColor, style: PaintingStyle.fill);
+    Paint handlerOutter = _getPaint(color: handlerColor, width: 2.0);
+
+    // draw handlers
+    if (mode == CircularSliderMode.doubleHandler) {
+      initHandler = radiansToCoordinates(center, -pi / 2 + startAngle, radius);
+      canvas.drawCircle(initHandler, 8.0, handler);
+      canvas.drawCircle(initHandler, handlerOutterRadius, handlerOutter);
+    }
+
+    endHandler = radiansToCoordinates(center, -pi / 2 + endAngle, radius);
+    canvas.drawCircle(endHandler, 8.0, handler);
+    if (showHandlerOutter) {
+      canvas.drawCircle(endHandler, handlerOutterRadius, handlerOutter);
+    }
+  }
+
+  Paint _getPaint({@required Color color, double width, PaintingStyle style}) =>
+      Paint()
+        ..color = color
+        ..strokeCap =
+        showRoundedCapInSelection ? StrokeCap.round : StrokeCap.butt
+        ..style = style ?? PaintingStyle.stroke
+        ..strokeWidth = width ?? sliderStrokeWidth;
+
+  @override
+  bool shouldRepaint(CustomPainter oldDelegate) {
+    return true;
+  }
+}

lib/plugins/circular_slider/utils.dart

@@ -0,0 +1,75 @@
+import 'dart:math';
+import 'dart:ui';
+
+double percentageToRadians(double percentage) => ((2 * pi * percentage) / 100);
+
+double radiansToPercentage(double radians) {
+  var normalized = radians < 0 ? -radians : 2 * pi - radians;
+  var percentage = ((100 * normalized) / (2 * pi));
+  // TODO we have an inconsistency of pi/2 in terms of percentage and radians
+  return (percentage + 25) % 100;
+}
+
+double coordinatesToRadians(Offset center, Offset coords) {
+  var a = coords.dx - center.dx;
+  var b = center.dy - coords.dy;
+  return atan2(b, a);
+}
+
+Offset radiansToCoordinates(Offset center, double radians, double radius) {
+  var dx = center.dx + radius * cos(radians);
+  var dy = center.dy + radius * sin(radians);
+  return Offset(dx, dy);
+}
+
+double valueToPercentage(int time, int intervals) => (time / intervals) * 100;
+
+int percentageToValue(double percentage, int intervals) =>
+    ((percentage * intervals) / 100).round();
+
+bool isPointInsideCircle(Offset point, Offset center, double rradius) {
+  var radius = rradius * 1.2;
+  return point.dx < (center.dx + radius) &&
+      point.dx > (center.dx - radius) &&
+      point.dy < (center.dy + radius) &&
+      point.dy > (center.dy - radius);
+}
+
+bool isPointAlongCircle(Offset point, Offset center, double radius) {
+  // distance is root(sqr(x2 - x1) + sqr(y2 - y1))
+  // i.e., (7,8) and (3,2) -> 7.21
+  var d1 = pow(point.dx - center.dx, 2);
+  var d2 = pow(point.dy - center.dy, 2);
+  var distance = sqrt(d1 + d2);
+  return (distance - radius).abs() < 10;
+}
+
+double getSweepAngle(double init, double end) {
+  if (end > init) {
+    return end - init;
+  }
+  return (100 - init + end).abs();
+}
+
+List<Offset> getSectionsCoordinatesInCircle(
+    Offset center, double radius, int sections) {
+  var intervalAngle = (pi * 2) / sections;
+  return List<int>.generate(sections, (int index) => index).map((i) {
+    var radians = (pi / 2) + (intervalAngle * i);
+    return radiansToCoordinates(center, radians, radius);
+  }).toList();
+}
+
+bool isAngleInsideRadiansSelection(double angle, double start, double sweep) {
+  var normalized = angle > pi / 2 ? 5 * pi / 2 - angle : pi / 2 - angle;
+  var end = (start + sweep) % (2 * pi);
+  return end > start
+      ? normalized > start && normalized < end
+      : normalized > start || normalized < end;
+}
+
+// this is not 100% accurate but it works
+// we just want to see if a value changed drastically its value
+bool radiansWasModuloed(double current, double previous) {
+  return (previous - current).abs() > (3 * pi / 2);
+}

lib/utils/logger.dart

@@ -1,4 +1,7 @@
-part of '../main.dart';
+import 'package:date_format/date_format.dart';
+import 'package:flutter/rendering.dart';
+import 'package:flutter/material.dart';
+
 
 class Logger {
 

pubspec.lock

@@ -22,13 +22,6 @@ packages:
       url: "https://pub.dartlang.org"
     source: hosted
     version: "2.2.0"
-  auto_size_text:
-    dependency: "direct main"
-    description:
-      name: auto_size_text
-      url: "https://pub.dartlang.org"
-    source: hosted
-    version: "2.1.0"
   boolean_selector:
     dependency: transitive
     description:

pubspec.yaml

@@ -26,7 +26,6 @@ dependencies:
   flutter_secure_storage: ^3.2.1+1
   device_info: ^0.4.0+2
   flutter_local_notifications: ^0.8.2
-  auto_size_text: ^2.1.0
 
 dev_dependencies:
   flutter_test: