Release barrier events when panel is fully visible

Author: lenemter

src/HotCorners/Barrier.vala

@@ -1,5 +1,5 @@
 /*
- * Copyright 2024 elementary, Inc. (https://elementary.io)
+ * Copyright 2024-2025 elementary, Inc. (https://elementary.io)
  * SPDX-License-Identifier: GPL-3.0-or-later
  */
 
@@ -9,7 +9,12 @@
 public class Gala.Barrier : Object {
     public signal void trigger ();
 
-    public bool triggered { get; set; default = false; }
+    public bool triggered { get; private set; default = false; }
+    /**
+     * Automatically release barrier events.
+     * May be useful for disabling barrier's pointer 'grabbing' when moving it between monitors.
+     */
+    public bool release_events { get; set; default = false; }
 
     public double trigger_pressure_threshold { get; construct; }
     public double release_pressure_threshold { get; construct; }
@@ -66,21 +71,20 @@ public class Gala.Barrier : Object {
             pressure += event.dy.abs ();
         }
 
-        if (!triggered && pressure > trigger_pressure_threshold) {
+        if (
+            !triggered && pressure > trigger_pressure_threshold ||
+            triggered && pressure.abs () > retrigger_pressure_threshold && event.time > retrigger_delay + triggered_time
+        ) {
             emit_trigger (event.time);
         }
 
-        if (!triggered && pressure > release_pressure_threshold) {
-            barrier.release (event);
-        }
-
-        if (triggered && event.time - triggered_time > 150) {
+        if (
+            release_events ||
+            !triggered && pressure > release_pressure_threshold ||
+            triggered && event.time - triggered_time > 150
+        ) {
             barrier.release (event);
         }
-
-        if (triggered && pressure.abs () > retrigger_pressure_threshold && event.time > retrigger_delay + triggered_time) {
-            emit_trigger (event.time);
-        }
     }
 
     private void emit_trigger (uint32 time) {

src/ShellClients/HideTracker.vala

@@ -1,5 +1,5 @@
 /*
- * Copyright 2024 elementary, Inc. (https://elementary.io)
+ * Copyright 2024-2025 elementary, Inc. (https://elementary.io)
  * SPDX-License-Identifier: GPL-3.0-or-later
  *
  * Authored by: Leonhard Kargl <[email protected]>
@@ -15,6 +15,7 @@ public class Gala.HideTracker : Object {
 
     public Meta.Display display { get; construct; }
     public unowned PanelWindow panel { get; construct; }
+    public bool release_barrier_events { get; set; default = false; }
 
     private static GLib.Settings behavior_settings;
 
@@ -176,6 +177,10 @@ public class Gala.HideTracker : Object {
                 warning ("Barrier side not supported yet");
                 break;
         }
+
+        if (barrier != null) {
+            bind_property ("release-barrier-events", barrier, "release-events", DEFAULT);
+        }
     }
 
     private void setup_barrier_top (Mtk.Rectangle monitor_geom, int offset) {

src/ShellClients/PanelWindow.vala

@@ -66,8 +66,8 @@ public class Gala.PanelWindow : ShellWindow, RootTarget {
         };
 
         hide_tracker = new HideTracker (wm.get_display (), this);
-        hide_tracker.hide.connect (hide);
-        hide_tracker.show.connect (show);
+        hide_tracker.hide.connect (() => user_gesture_controller.goto (1));
+        hide_tracker.show.connect (() => user_gesture_controller.goto (0));
 
         workspace_gesture_controller = new GestureController (CUSTOM, wm) {
             progress = 1.0
@@ -143,14 +143,10 @@ public class Gala.PanelWindow : ShellWindow, RootTarget {
     public override void propagate (GestureTarget.UpdateType update_type, GestureAction action, double progress) {
         workspace_hide_tracker.update (update_type, action, progress);
         base.propagate (update_type, action, progress);
-    }
-
-    private void hide () {
-        user_gesture_controller.goto (1);
-    }
 
-    private void show () {
-        user_gesture_controller.goto (0);
+        // Forcefully release barrier events when we are fully visible
+        // to avoid interference with multiple monitors workflow
+        hide_tracker.release_barrier = get_hidden_progress () == 1.0;
     }
 
     private bool update_overlap (Meta.Workspace workspace) {