From baea7660be289e19f7f7d0aeb14da0b4c4cb6e7d Mon Sep 17 00:00:00 2001
From: CodeDoctorDE <codedoctor@linwood.dev>
Date: Wed, 8 Nov 2023 13:40:07 +0100
Subject: [PATCH] Fix pointer list on window exit, closes #521

---
 app/lib/cubits/current_index.dart                 |  4 +++-
 app/lib/renderers/renderer.dart                   | 12 ++++++++----
 app/lib/views/view.dart                           |  4 ++++
 fastlane/metadata/android/en-US/changelogs/79.txt |  1 +
 4 files changed, 16 insertions(+), 5 deletions(-)

diff --git a/app/lib/cubits/current_index.dart b/app/lib/cubits/current_index.dart
index 03e4d6c30692..15317c25202d 100644
--- a/app/lib/cubits/current_index.dart
+++ b/app/lib/cubits/current_index.dart
@@ -106,6 +106,7 @@ class CurrentIndexCubit extends Cubit<CurrentIndex> {
 
   Handler? changeTool(DocumentBloc bloc, int index,
       [Handler? handler, bool justAdded = false, bool runSelected = true]) {
+    resetInput(bloc);
     final blocState = bloc.state;
     if (blocState is! DocumentLoadSuccess) return null;
     final document = blocState.data;
@@ -286,7 +287,8 @@ class CurrentIndexCubit extends Cubit<CurrentIndex> {
   }
 
   void addPointer(int pointer) {
-    emit(state.copyWith(pointers: state.pointers.toList()..add(pointer)));
+    emit(state.copyWith(
+        pointers: (state.pointers.toSet()..add(pointer)).toList()));
   }
 
   void removePointer(int pointer) {
diff --git a/app/lib/renderers/renderer.dart b/app/lib/renderers/renderer.dart
index b52d9fda3238..5959420fe25d 100644
--- a/app/lib/renderers/renderer.dart
+++ b/app/lib/renderers/renderer.dart
@@ -182,14 +182,18 @@ abstract class Renderer<T> {
     position ??= relative ? Offset.zero : rect.topLeft;
     final nextPosition = relative ? position + rect.topLeft : position;
 
-    final scale = Offset(scaleX, scaleY);
-    //     .rotate(const Offset(1, 1), useRotation / 180 * pi);
+    final radians = rotation * (pi / 180);
+    final cosRotation = cos(radians);
+    final sinRotation = sin(radians);
+
+    scaleX = scaleX * cosRotation - scaleY * sinRotation;
+    scaleY = scaleX * sinRotation + scaleY * cosRotation;
 
     return _transform(
       position: nextPosition,
       rotation: nextRotation,
-      scaleX: scale.dx,
-      scaleY: scale.dy,
+      scaleX: scaleX,
+      scaleY: scaleY,
     );
   }
 
diff --git a/app/lib/views/view.dart b/app/lib/views/view.dart
index 8f6c37b42fa0..70617e1eef7e 100644
--- a/app/lib/views/view.dart
+++ b/app/lib/views/view.dart
@@ -350,6 +350,10 @@ class _MainViewViewportState extends State<MainViewViewport>
                           child: BlocBuilder<TransformCubit, CameraTransform>(
                             builder: (context, transform) => MouseRegion(
                               cursor: currentIndex.currentCursor,
+                              onExit: (event) {
+                                cubit.removePointer(event.pointer);
+                                cubit.removeButtons();
+                              },
                               child: ClipRRect(
                                 child: Stack(children: [
                                   Container(color: Colors.white),
diff --git a/fastlane/metadata/android/en-US/changelogs/79.txt b/fastlane/metadata/android/en-US/changelogs/79.txt
index d2dce39d26ff..96d3d89ef295 100644
--- a/fastlane/metadata/android/en-US/changelogs/79.txt
+++ b/fastlane/metadata/android/en-US/changelogs/79.txt
@@ -1,4 +1,5 @@
 * Add templates to data settings
 * Fix icon button if no display icon available
+* Fix pointer list on window exit ([#521](https://github.com/LinwoodDev/Butterfly/issues/521))
 
 View all changes in the blog: https://linwood.dev/butterfly/2.0.0-beta.15
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