From c186ca1acb112b2bbf62b750d992065fa0b3e595 Mon Sep 17 00:00:00 2001
From: rhysd <lin90162@yahoo.co.jp>
Date: Thu, 23 Jan 2025 22:16:11 +0900
Subject: [PATCH] Do not capture released event inside `image::Viewer` when
 mouse is not dragged

---
 widget/src/image/viewer.rs | 15 +++++++++++++--
 1 file changed, 13 insertions(+), 2 deletions(-)

diff --git a/widget/src/image/viewer.rs b/widget/src/image/viewer.rs
index 20a7955f3a..131fd0784d 100644
--- a/widget/src/image/viewer.rs
+++ b/widget/src/image/viewer.rs
@@ -231,9 +231,20 @@ where
             Event::Mouse(mouse::Event::ButtonReleased(mouse::Button::Left)) => {
                 let state = tree.state.downcast_mut::<State>();
 
-                if state.cursor_grabbed_at.is_some() {
+                if let Some(grab_start) = state.cursor_grabbed_at {
                     state.cursor_grabbed_at = None;
-                    shell.capture_event();
+
+                    let dragged = cursor
+                        .position_over(bounds)
+                        .map(|grab_end| {
+                            (grab_start.x - grab_end.x).abs() >= 1.0
+                                || (grab_start.y - grab_end.y).abs() >= 1.0
+                        })
+                        .unwrap_or(true);
+
+                    if dragged {
+                        shell.capture_event();
+                    }
                 }
             }
             Event::Mouse(mouse::Event::CursorMoved { position }) => {