From 7221bf3eeaa18c0122414982718e8adcc724999c Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E3=81=95=E3=81=A8=E3=82=84=EF=BD=8E?= <satoyanxp@gmail.com>
Date: Mon, 21 Oct 2024 18:46:22 +0900
Subject: [PATCH] chore: enable to pass paintKey from parent

When we need a small-sized image drawn by the user, repaintKey will be
usefull. Users can get a small-sized image by using repaintKey on their
own.
---
 lib/src/_paint_over_image.dart | 67 +++++++++++++++++++++-------------
 1 file changed, 41 insertions(+), 26 deletions(-)

diff --git a/lib/src/_paint_over_image.dart b/lib/src/_paint_over_image.dart
index f7a6abb..0c7bd2d 100644
--- a/lib/src/_paint_over_image.dart
+++ b/lib/src/_paint_over_image.dart
@@ -53,6 +53,7 @@ class ImagePainter extends StatefulWidget {
     this.onClear,
     this.quarterTurns,
     this.contentPadding,
+    this.repaintKey,
   }) : super(key: key);
 
   ///Constructor for loading image from network url.
@@ -85,6 +86,7 @@ class ImagePainter extends StatefulWidget {
     VoidCallback? onClear,
     int? quarterTurns,
     EdgeInsets? contentPadding,
+    GlobalKey? repaintKey,
   }) {
     return ImagePainter._(
       key: key,
@@ -115,6 +117,7 @@ class ImagePainter extends StatefulWidget {
       onClear: onClear,
       quarterTurns: quarterTurns,
       contentPadding: contentPadding,
+      repaintKey: repaintKey,
     );
   }
 
@@ -148,6 +151,7 @@ class ImagePainter extends StatefulWidget {
     VoidCallback? onClear,
     int? quarterTurns,
     EdgeInsets? contentPadding,
+    GlobalKey? repaintKey,
   }) {
     return ImagePainter._(
       controller: controller,
@@ -178,6 +182,7 @@ class ImagePainter extends StatefulWidget {
       onClear: onClear,
       quarterTurns: quarterTurns,
       contentPadding: contentPadding,
+      repaintKey: repaintKey,
     );
   }
 
@@ -211,6 +216,7 @@ class ImagePainter extends StatefulWidget {
     VoidCallback? onClear,
     int? quarterTurns,
     EdgeInsets? contentPadding,
+    GlobalKey? repaintKey,
   }) {
     return ImagePainter._(
       controller: controller,
@@ -241,6 +247,7 @@ class ImagePainter extends StatefulWidget {
       onClear: onClear,
       quarterTurns: quarterTurns,
       contentPadding: contentPadding,
+      repaintKey: repaintKey,
     );
   }
 
@@ -274,6 +281,7 @@ class ImagePainter extends StatefulWidget {
     VoidCallback? onClear,
     int? quarterTurns,
     EdgeInsets? contentPadding,
+    GlobalKey? repaintKey,
   }) {
     return ImagePainter._(
       controller: controller,
@@ -304,6 +312,7 @@ class ImagePainter extends StatefulWidget {
       onClear: onClear,
       quarterTurns: quarterTurns,
       contentPadding: contentPadding,
+      repaintKey: repaintKey,
     );
   }
 
@@ -334,6 +343,7 @@ class ImagePainter extends StatefulWidget {
     VoidCallback? onRedo,
     VoidCallback? onClear,
     EdgeInsets? contentPadding,
+    GlobalKey? repaintKey,
   }) {
     return ImagePainter._(
       controller: controller,
@@ -363,6 +373,7 @@ class ImagePainter extends StatefulWidget {
       onRedo: onRedo,
       onClear: onClear,
       contentPadding: contentPadding,
+      repaintKey: repaintKey ?? GlobalKey(),
     );
   }
 
@@ -453,13 +464,14 @@ class ImagePainter extends StatefulWidget {
   // Padding for image content
   final EdgeInsets? contentPadding;
 
+  final GlobalKey? repaintKey;
+
   @override
   ImagePainterState createState() => ImagePainterState();
 }
 
 ///
 class ImagePainterState extends State<ImagePainter> {
-  final _repaintKey = GlobalKey();
   ui.Image? _image;
   late final ImagePainterController _controller;
   late final ValueNotifier<bool> _isLoaded;
@@ -604,30 +616,33 @@ class ImagePainterState extends State<ImagePainter> {
           Expanded(
             child: Padding(
               padding: widget.contentPadding ?? EdgeInsets.zero,
-              child: RotatedBox(
-                quarterTurns: widget.quarterTurns ?? 0,
-                child: FittedBox(
-                  alignment: FractionalOffset.center,
-                  child: ClipRect(
-                    child: AnimatedBuilder(
-                      animation: _controller,
-                      builder: (context, child) {
-                        return InteractiveViewer(
-                          transformationController: _transformationController,
-                          maxScale: 2.4,
-                          minScale: 1,
-                          panEnabled: _controller.mode == PaintMode.none,
-                          scaleEnabled: widget.isScalable!,
-                          onInteractionUpdate: _scaleUpdateGesture,
-                          onInteractionEnd: _scaleEndGesture,
-                          child: CustomPaint(
-                            size: imageSize,
-                            willChange: true,
-                            isComplex: true,
-                            painter: DrawImage(controller: _controller),
-                          ),
-                        );
-                      },
+              child: RepaintBoundary(
+                key: widget.repaintKey,
+                child: RotatedBox(
+                  quarterTurns: widget.quarterTurns ?? 0,
+                  child: FittedBox(
+                    alignment: FractionalOffset.center,
+                    child: ClipRect(
+                      child: AnimatedBuilder(
+                        animation: _controller,
+                        builder: (context, child) {
+                          return InteractiveViewer(
+                            transformationController: _transformationController,
+                            maxScale: 2.4,
+                            minScale: 1,
+                            panEnabled: _controller.mode == PaintMode.none,
+                            scaleEnabled: widget.isScalable!,
+                            onInteractionUpdate: _scaleUpdateGesture,
+                            onInteractionEnd: _scaleEndGesture,
+                            child: CustomPaint(
+                              size: imageSize,
+                              willChange: true,
+                              isComplex: true,
+                              painter: DrawImage(controller: _controller),
+                            ),
+                          );
+                        },
+                      ),
                     ),
                   ),
                 ),
@@ -647,7 +662,7 @@ class ImagePainterState extends State<ImagePainter> {
     return Stack(
       children: [
         RepaintBoundary(
-          key: _repaintKey,
+          key: widget.repaintKey,
           child: ClipRect(
             child: Container(
               width: widget.width ?? double.maxFinite,