Separate entity classes on different files

lib/entity_class/slider_entity.class.dart

@@ -0,0 +1,60 @@
+part of '../main.dart';
+
+class SliderEntity extends Entity {
+  int _multiplier = 1;
+
+  double get minValue => _attributes["min"] ?? 0.0;
+  double get maxValue => _attributes["max"] ?? 100.0;
+  double get valueStep => _attributes["step"] ?? 1.0;
+  double get doubleState => double.tryParse(_state) ?? 0.0;
+
+  SliderEntity(Map rawData) : super(rawData) {
+    if (valueStep < 1) {
+      _multiplier = 10;
+    } else if (valueStep < 0.1) {
+      _multiplier = 100;
+    }
+  }
+
+  @override
+  void sendNewState(newValue) {
+    eventBus.fire(new ServiceCallEvent(_domain, "set_value", _entityId,
+        {"value": "${newValue.toString()}"}));
+  }
+
+  @override
+  Widget _buildActionWidget(bool inCard, BuildContext context) {
+    return Container(
+      width: 200.0,
+      child: Row(
+        children: <Widget>[
+          Expanded(
+            child: Slider(
+              min: this.minValue * _multiplier,
+              max: this.maxValue * _multiplier,
+              value: (this.doubleState <= this.maxValue) &&
+                  (this.doubleState >= this.minValue)
+                  ? this.doubleState * _multiplier
+                  : this.minValue * _multiplier,
+              onChanged: (value) {
+                eventBus.fire(new StateChangedEvent(_entityId,
+                    (value.roundToDouble() / _multiplier).toString(), true));
+              },
+              onChangeEnd: (value) {
+                sendNewState(value.roundToDouble() / _multiplier);
+              },
+            ),
+          ),
+          Padding(
+            padding: EdgeInsets.only(right: Entity.RIGHT_WIDGET_PADDING),
+            child: Text("$_state${this.unitOfMeasurement}",
+                textAlign: TextAlign.right,
+                style: new TextStyle(
+                  fontSize: Entity.STATE_FONT_SIZE,
+                )),
+          )
+        ],
+      ),
+    );
+  }
+}