From 6b9795ad005502fa99bbd79d5032df74dec5d3c6 Mon Sep 17 00:00:00 2001
From: gtyhn <122523252@qq.com>
Date: Sat, 10 Jul 2021 01:23:16 +0800
Subject: [PATCH] Fixed the position of the selection status drag handle (#288)

* fix the OnImagePickCallback return value

* solve placeholder issue, removing must focus

* Fixed the position of the selection status drag handle
---
 lib/src/widgets/text_selection.dart | 11 +++++++++--
 1 file changed, 9 insertions(+), 2 deletions(-)

diff --git a/lib/src/widgets/text_selection.dart b/lib/src/widgets/text_selection.dart
index 85362c7a..96e5310f 100644
--- a/lib/src/widgets/text_selection.dart
+++ b/lib/src/widgets/text_selection.dart
@@ -287,6 +287,9 @@ class _TextSelectionHandleOverlay extends StatefulWidget {
 class _TextSelectionHandleOverlayState
     extends State<_TextSelectionHandleOverlay>
     with SingleTickerProviderStateMixin {
+
+  late Offset _dragPosition;
+  late Size _handleSize;
   late AnimationController _controller;
 
   Animation<double> get _opacity => _controller.view;
@@ -325,11 +328,14 @@ class _TextSelectionHandleOverlayState
     super.dispose();
   }
 
-  void _handleDragStart(DragStartDetails details) {}
+  void _handleDragStart(DragStartDetails details) {
+    _dragPosition = details.globalPosition + Offset(0.0, -_handleSize.height);
+  }
 
   void _handleDragUpdate(DragUpdateDetails details) {
+    _dragPosition += details.delta;
     final position =
-        widget.renderObject!.getPositionForOffset(details.globalPosition);
+        widget.renderObject!.getPositionForOffset(_dragPosition);
     if (widget.selection.isCollapsed) {
       widget.onSelectionHandleChanged(TextSelection.fromPosition(position));
       return;
@@ -398,6 +404,7 @@ class _TextSelectionHandleOverlayState
     final handleAnchor =
         widget.selectionControls.getHandleAnchor(type!, lineHeight);
     final handleSize = widget.selectionControls.getHandleSize(lineHeight);
+    _handleSize = handleSize;
 
     final handleRect = Rect.fromLTWH(
       -handleAnchor.dx,