Separate entity classes on different files

lib/entity_class/text_entity.class.dart

@@ -0,0 +1,76 @@
+part of '../main.dart';
+
+class TextEntity extends Entity {
+  String tmpState;
+  FocusNode _focusNode;
+  bool validValue = false;
+
+  int get valueMinLength => _attributes["min"] ?? -1;
+  int get valueMaxLength => _attributes["max"] ?? -1;
+  String get valuePattern => _attributes["pattern"] ?? null;
+  bool get isTextField => _attributes["mode"] == "text";
+  bool get isPasswordField => _attributes["mode"] == "password";
+
+  TextEntity(Map rawData) : super(rawData) {
+    _focusNode = FocusNode();
+    //TODO possible memory leak generator
+    _focusNode.addListener(_focusListener);
+    //tmpState = state;
+  }
+
+  @override
+  void sendNewState(newValue) {
+    if (validate(newValue)) {
+      eventBus.fire(new ServiceCallEvent(_domain, "set_value", _entityId,
+          {"value": "$newValue"}));
+    }
+  }
+
+  @override
+  void update(Map rawData) {
+    super.update(rawData);
+    tmpState = _state;
+  }
+
+  bool validate(newValue) {
+    if (newValue is String) {
+      //TODO add pattern support
+      validValue = (newValue.length >= this.valueMinLength) &&
+          (this.valueMaxLength == -1 ||
+              (newValue.length <= this.valueMaxLength));
+    } else {
+      validValue = true;
+    }
+    return validValue;
+  }
+
+  void _focusListener() {
+    if (!_focusNode.hasFocus && (tmpState != state)) {
+      sendNewState(tmpState);
+      tmpState = state;
+    }
+  }
+
+  @override
+  Widget _buildActionWidget(bool inCard, BuildContext context) {
+    if (this.isTextField || this.isPasswordField) {
+      return Container(
+        width: Entity.INPUT_WIDTH,
+        child: TextField(
+            focusNode: inCard ? _focusNode : null,
+            obscureText: this.isPasswordField,
+            controller: new TextEditingController.fromValue(
+                new TextEditingValue(
+                    text: tmpState,
+                    selection:
+                    new TextSelection.collapsed(offset: tmpState.length))),
+            onChanged: (value) {
+              tmpState = value;
+            }),
+      );
+    } else {
+      TheLogger.log("Warning", "Unsupported input mode for $entityId");
+      return super._buildActionWidget(inCard, context);
+    }
+  }
+}