From: Jonas Dreßler <verdre@v0yd.nl>
Date: Tue, 9 Jun 2020 16:31:23 +0000 (+0200)
Subject: dnd: Set drag actor position immediately after reparenting
X-Git-Tag: archive/raspbian/50.5-1+rpi1~1^2~684^2^2~236
X-Git-Url: https://dgit.raspbian.org/%22http://www.example.com/cgi/%22/%22http:/www.example.com/cgi/%22?a=commitdiff_plain;h=89ba8562c3c309b9e0bb5c453c907d05d284e5f5;p=gnome-shell.git

dnd: Set drag actor position immediately after reparenting

For drag actors which get reparented to the uiGroup, we currently wait
until the next input event to set the fixed position of the actor, until
that they will just be allocated their old fixed position, which is 0,
0.

So avoid drag actors flickering at the top left for one frame and
position them correctly right after reparenting.

https://gitlab.gnome.org/GNOME/gnome-shell/-/merge_requests/1310
---

diff --git a/js/ui/dnd.js b/js/ui/dnd.js
index f356c03c7..464d61bb8 100644
--- a/js/ui/dnd.js
+++ b/js/ui/dnd.js
@@ -428,6 +428,10 @@ var _Draggable = class _Draggable {
         this._dragOffsetX -= transX;
         this._dragOffsetY -= transY;
 
+        this._dragActor.set_position(
+            this._dragX + this._dragOffsetX,
+            this._dragY + this._dragOffsetY);
+
         if (this._dragActorMaxSize != undefined) {
             let [scaledWidth, scaledHeight] = this._dragActor.get_transformed_size();
             let currentSize = Math.max(scaledWidth, scaledHeight);