From 0bc7a0107fc0152a56fcb9c29c6704f95b6080d9 Mon Sep 17 00:00:00 2001
From: Yueyu <donald@drmer.net>
Date: Sat, 10 Jul 2021 07:51:07 +0800
Subject: [PATCH] add some thresholds for stage outside

---
 src/editor/engine/Stage.js | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

diff --git a/src/editor/engine/Stage.js b/src/editor/engine/Stage.js
index ced5638..b7b0f0c 100644
--- a/src/editor/engine/Stage.js
+++ b/src/editor/engine/Stage.js
@@ -474,8 +474,16 @@ export default class Stage {
         var pt = this.getStagePt(e);
         // if pointer is outside stage
         // cancel the dragging event
-        if (pt.x < 0 || pt.x > this.width || pt.y < 0 || pt.y > this.height) {
+        var threshold = 15;
+        if (
+            pt.x < -threshold
+            || pt.y < -threshold
+            || pt.x > (this.width + threshold)
+            || pt.y > (this.height + threshold)
+        ) {
+            Events.clearEvents();
             Events.dragged = false;
+            Events.dragthumbnail = undefined;
             return;
         }
         var delta = Vector.diff(pt, this.initialPoint);