Update editable text, and some samples.

Runtime/widgets/editable_text.cs

             D.assert(style != null);
             D.assert(cursorColor != null);
             D.assert(maxLines == null || maxLines > 0);
-            // D.assert(backgroundCursorColor != null); // TODO: remove comment when this parameter is actually used
+            D.assert(backgroundCursorColor != null);
             this.keyboardType = keyboardType ?? (maxLines == 1 ? TextInputType.text : TextInputType.multiline);
 
             this.scrollPadding = scrollPadding ?? EdgeInsets.all(20.0f);
             this._cursorBlinkOpacityController = new AnimationController(vsync: this, duration: _fadeDuration);
             this._cursorBlinkOpacityController.addListener(this._onCursorColorTick);
             this._floatingCursorResetController = new AnimationController(vsync: this);
-            // this._floatingCursorResetController.addListener(_onFloatingCursorResetTick); // TODO: remove comment when _onFLoatingCursorResetTick is ready
+            // this._floatingCursorResetController.addListener(_onFloatingCursorResetTick); // TODO: remove comment when _onFloatingCursorResetTick is ready
         }
 
         public override void didChangeDependencies() {
                             textSpan: this.buildTextSpan(),
                             value: this._value,
                             cursorColor: this._cursorColor,
-                            // backgroundCursorColor: this.widget.backgroundCursorColor, // TODO
+                            backgroundCursorColor: this.widget.backgroundCursorColor,
                             showCursor: EditableText.debugDeterministicCursor
                                 ? new ValueNotifier<bool>(true)
                                 : this._cursorVisibilityNotifier,
                             rendererIgnoresPointer: this.widget.rendererIgnoresPointer,
                             cursorWidth: this.widget.cursorWidth,
                             cursorRadius: this.widget.cursorRadius,
-                            // cursorOffset: this.widget.cursorOffset, // TODO
-                            // paintCursorAboveText: this.widget.paintCursorAboveText, // TODO
+                            cursorOffset: this.widget.cursorOffset,
+                            paintCursorAboveText: this.widget.paintCursorAboveText,
-                            textSelectionDelegate: this
-                            // devicePixelRatio: _devicePixelRatio // TODO
+                            textSelectionDelegate: this,
+                            devicePixelRatio: this._devicePixelRatio
                         )
                     )
             );
         public readonly TextSpan textSpan;
         public readonly TextEditingValue value;
         public readonly Color cursorColor;
-        public readonly Color backgroundColor;
+        public readonly Color backgroundCursorColor;
         public readonly ValueNotifier<bool> showCursor;
         public readonly bool hasFocus;
         public readonly int? maxLines;
 
 
         public _Editable(TextSpan textSpan = null, TextEditingValue value = null,
-            Color cursorColor = null, Color backgroundColor = null, ValueNotifier<bool> showCursor = null,
+            Color cursorColor = null, Color backgroundCursorColor = null, ValueNotifier<bool> showCursor = null,
             bool hasFocus = false,
             int? maxLines = null, Color selectionColor = null, float textScaleFactor = 1.0f,
             TextDirection? textDirection = null, bool obscureText = false, TextAlign textAlign = TextAlign.left,
             this.textSpan = textSpan;
             this.value = value;
             this.cursorColor = cursorColor;
-            this.backgroundColor = backgroundColor;
+            this.backgroundCursorColor = backgroundCursorColor;
             this.showCursor = showCursor;
             this.hasFocus = hasFocus;
             this.maxLines = maxLines;
                 offset: this.offset,
                 showCursor: this.showCursor,
                 cursorColor: this.cursorColor,
-                // backgroundColor: this.backgroundColor, // TODO
+                backgroundCursorColor: this.backgroundCursorColor,
                 hasFocus: this.hasFocus,
                 maxLines: this.maxLines,
                 selectionColor: this.selectionColor,
                 ignorePointer: this.rendererIgnoresPointer,
                 cursorWidth: this.cursorWidth ?? 1.0f,
                 cursorRadius: this.cursorRadius,
-                // cursorOffset: this.cursorOffset, // TODO
+                cursorOffset: this.cursorOffset,
-                textSelectionDelegate: this.textSelectionDelegate
-                // paintCursorAboveText: this.paintCursorAboveText, // TODO
-                // devicePixelRatio: this.devicePixelRatio // TODO
+                textSelectionDelegate: this.textSelectionDelegate,
+                paintCursorAboveText: this.paintCursorAboveText == true,
+                devicePixelRatio: this.devicePixelRatio ?? 1.0f
             );
         }
 
             edit.cursorColor = this.cursorColor;
-            // edit.backgroundColor = this.backgroundColor; // TODO
+            edit.backgroundCursorColor = this.backgroundCursorColor;
             edit.showCursor = this.showCursor;
             edit.hasFocus = this.hasFocus;
             edit.maxLines = this.maxLines;
             edit.textSelectionDelegate = this.textSelectionDelegate;
             edit.cursorWidth = this.cursorWidth ?? 1.0f;
             edit.cursorRadius = this.cursorRadius;
-            // edit.cursorOffset = this.cursorOffset; // TODO
+            edit.cursorOffset = this.cursorOffset;
-            // edit.paintCursorAboveText = this.paintCursorAboveText; // TODO
-            // edit.devicePixelRatio = this.devicePixelRatio; // TODO
+            edit.paintCursorAboveText = this.paintCursorAboveText == true;
+            edit.devicePixelRatio = this.devicePixelRatio ?? 1.0f;
         }
     }
 }

Samples/ReduxSample/ObjectFinder/ObjectFinderApp.cs

                             padding: EdgeInsets.only(left: 8, right: 8),
                             child: new EditableText(
                                 selectionControls: MaterialUtils.materialTextSelectionControls,
+                                backgroundCursorColor: Colors.transparent,
                                 controller: this._controller,
                                 focusNode: this._focusNode,
                                 style: new TextStyle(

Samples/UIWidgetSample/TextInputSample.cs

                             child: new EditableText(maxLines: 1,
                                 controller: this.titleController,
                                 selectionControls: MaterialUtils.materialTextSelectionControls,
+                                backgroundCursorColor: Colors.transparent,
                                 autofocus: true,
                                 focusNode: new FocusNode(),
                                 style: new TextStyle(
                                 padding: EdgeInsets.fromLTRB(8, 0, 8, 0),
                                 child: new EditableText(maxLines: 200,
                                     controller: this.descController,
+                                    backgroundCursorColor: Colors.transparent,
                                     selectionControls: MaterialUtils.materialTextSelectionControls,
                                     focusNode: new FocusNode(),
                                     style: new TextStyle(
             var selectionColor = new Color(0xFF6F6F6F);
             
             widgets.Add(this.rowWidgets("Default", new EditStateProvider(builder: ((buildContext, controller, node) =>
-                new EditableText(controller, node, style, cursorColor, selectionColor: selectionColor,  onSubmitted: this.textSubmitted
+                new EditableText(controller, node, style, cursorColor, Colors.transparent, selectionColor: selectionColor,  onSubmitted: this.textSubmitted
-                    new EditableText(controller, node, style, cursorColor, selectionColor: selectionColor,  maxLines: 4,
+                    new EditableText(controller, node, style, cursorColor, Colors.transparent, selectionColor: selectionColor,  maxLines: 4,
-                    new EditableText(controller, node, style, cursorColor, selectionColor: selectionColor, obscureText: true,
+                    new EditableText(controller, node, style, cursorColor, Colors.transparent, selectionColor: selectionColor, obscureText: true,
-                new EditableText(controller, node, style, cursorColor, selectionColor: selectionColor, keyboardType: TextInputType.number,
+                new EditableText(controller, node, style, cursorColor, Colors.transparent, selectionColor: selectionColor, keyboardType: TextInputType.number,
-                new EditableText(controller, node, style, cursorColor, selectionColor: selectionColor, keyboardType: TextInputType.phone,
+                new EditableText(controller, node, style, cursorColor, Colors.transparent, selectionColor: selectionColor, keyboardType: TextInputType.phone,
-                new EditableText(controller, node, style, cursorColor, selectionColor: selectionColor, keyboardType: TextInputType.emailAddress,
+                new EditableText(controller, node, style, cursorColor, Colors.transparent, selectionColor: selectionColor, keyboardType: TextInputType.emailAddress,
-                new EditableText(controller, node, style, cursorColor, selectionColor: selectionColor, keyboardType: TextInputType.url,
+                new EditableText(controller, node, style, cursorColor, Colors.transparent, selectionColor: selectionColor, keyboardType: TextInputType.url,
                     onSubmitted: this.textSubmitted, unityTouchKeyboard: unityKeyboard,
                     selectionControls: MaterialUtils.materialTextSelectionControls)))));
             return widgets;