From 44e65dc84fc16604d7e957a225263499adbbeb8d Mon Sep 17 00:00:00 2001
From: Minyewoo <const.trushov@gmail.com>
Date: Tue, 20 Jun 2023 19:43:17 +0300
Subject: [PATCH] SmallLinearValueIndicator | Added alarm boundaries

---
 .../pointer_progress_indicator.dart           | 11 ++---
 .../small_linear_value_indicator.dart         | 41 +++++++++++++++----
 2 files changed, 39 insertions(+), 13 deletions(-)

diff --git a/lib/src/indicators/value_indicators/pointer_progress_indicator.dart b/lib/src/indicators/value_indicators/pointer_progress_indicator.dart
index dc83d7d..caf0b73 100644
--- a/lib/src/indicators/value_indicators/pointer_progress_indicator.dart
+++ b/lib/src/indicators/value_indicators/pointer_progress_indicator.dart
@@ -1,20 +1,22 @@
 import 'package:flutter/material.dart';
-import 'package:hmi_widgets/hmi_widgets.dart';
 ///
 class PointerProgressIndicator extends StatelessWidget {
   final double _value;
   final double _minHeight;
   final double _pointerThickness;
   final double _scaleLineThickness;
+  final Color? _color;
   ///
   const PointerProgressIndicator({
     super.key,
-    double value = 0,
     required double minHeight,
+    double value = 0,
+    Color? color,
     double pointerThickness = 4, 
     double scaleLineThickness = 0.25,
   }) : 
-    _value = value, 
+    _value = value,
+    _color = color,
     _minHeight = minHeight, 
     _pointerThickness = pointerThickness, 
     _scaleLineThickness = scaleLineThickness;
@@ -23,8 +25,7 @@ class PointerProgressIndicator extends StatelessWidget {
   Widget build(BuildContext context) {
     final theme = Theme.of(context);
     final defaultColor = theme.colorScheme.onBackground;
-    final blockedColor = theme.stateColors.alarmLowLevel;
-    final currentColor = (_value == 0 || _value == 1) ? blockedColor : defaultColor;
+    final currentColor = _color ?? defaultColor;
     return SizedBox(
       height: _minHeight,
       child: Stack(
diff --git a/lib/src/indicators/value_indicators/small_linear_value_indicator.dart b/lib/src/indicators/value_indicators/small_linear_value_indicator.dart
index e9501db..3cf0218 100644
--- a/lib/src/indicators/value_indicators/small_linear_value_indicator.dart
+++ b/lib/src/indicators/value_indicators/small_linear_value_indicator.dart
@@ -17,25 +17,34 @@ class SmallLinearValueIndicator extends StatelessWidget {
   final double _textIndicatorWidth;
   final double _min;
   final double _max;
+  final double? _high;
+  final double? _low;
   final Stream<DsDataPoint<num>> _stream;
   final IndicationStyle _indicationStyle;
+  final Color? _defaultColor;
   ///
   const SmallLinearValueIndicator({
     super.key,
     required Stream<DsDataPoint<num>> stream,
     required double max,
     double min = 0.0,
+    double? high,
+    double? low,
     Widget? caption,
     String valueUnit = '',
     double textIndicatorWidth = 55, 
     IndicationStyle indicationStyle = IndicationStyle.pointer,
+    Color? defaultColor,
   }) : _indicationStyle = indicationStyle, 
     _stream = stream,
     _min = min,
     _max = max,
+    _high = high,
+    _low = low,
     _caption = caption,
     _valueUnit = valueUnit,
-    _textIndicatorWidth = textIndicatorWidth;
+    _textIndicatorWidth = textIndicatorWidth,
+    _defaultColor = defaultColor;
   //
   @override
   Widget build(BuildContext context) {
@@ -43,6 +52,8 @@ class SmallLinearValueIndicator extends StatelessWidget {
     final caption = _caption;
     final padding = const Setting('padding').toDouble;
     final smallPadding = const Setting('smallPadding').toDouble;
+    final theme = Theme.of(context);
+    final alarmColor = theme.stateColors.alarm;
     return Card(
       margin: EdgeInsets.zero,
       child: Padding(
@@ -68,21 +79,27 @@ class SmallLinearValueIndicator extends StatelessWidget {
                     stream: _stream,
                     builder:(context, snapshot) {
                       final indicatorHeight = smallPadding * 3;
-                      final snapshotValue = snapshot.data?.value.toDouble();
-                      final value = snapshotValue == null 
-                        ? 0.0 
-                        : (max(snapshotValue, _min) - _min) / delta;
+                      final snapshotValue = min(
+                        max(
+                          snapshot.data?.value.toDouble() ?? _min,
+                          _min,
+                        ), 
+                        _max,
+                      );
+                      final percantage = (snapshotValue - _min) / delta;
+                      final isAlarm = _isAlarm(snapshotValue);
                       switch(_indicationStyle) {
                         case IndicationStyle.bar:
                           return LinearProgressIndicator(
-                            value: value,
+                            value: percantage,
                             minHeight: indicatorHeight,
-                            color: Theme.of(context).stateColors.on,
+                            color: isAlarm ? alarmColor : _defaultColor,
                           );
                         case IndicationStyle.pointer:
                           return PointerProgressIndicator(
-                            value: value,
+                            value: percantage,
                             minHeight: indicatorHeight,
+                            color: isAlarm ? alarmColor : _defaultColor,
                           );
                       }
                     },
@@ -109,4 +126,12 @@ class SmallLinearValueIndicator extends StatelessWidget {
       ),
     );
   }
+
+  bool _isAlarm(double currentValue) {
+    final low = _low;
+    final high = _high;
+    final isAlarmLow = low != null && currentValue - low < 0;
+    final isAlarmHigh = high != null && currentValue - high > 0;
+    return isAlarmLow || isAlarmHigh;
+  }
 }