From 54264a9f78044c27d65208c52f00c2d97369ad5c Mon Sep 17 00:00:00 2001
From: "g.willems" <g.willems.dev@laposte.net>
Date: Mon, 11 Mar 2024 20:32:59 +0100
Subject: [PATCH] paned: don't claim drag-begin on invisible handle

Paned handles are hidden when any of its children are hidden too,
but drag events were still accepted around the (virtual) handle position.

Instead, deny drag-begin when handle is hidden.

Fixes #6520
Closes #6520
---
 gtk/gtkpaned.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/gtk/gtkpaned.c b/gtk/gtkpaned.c
index 154f2f2863..5c30aad390 100644
--- a/gtk/gtkpaned.c
+++ b/gtk/gtkpaned.c
@@ -886,6 +886,14 @@ gesture_drag_begin_cb (GtkGestureDrag *gesture,
   GdkDevice *device;
   gboolean is_touch;
 
+  /* Only drag the handle when it's visible */
+  if (!gtk_widget_get_child_visible (paned->handle_widget))
+    {
+      gtk_gesture_set_state (GTK_GESTURE (gesture),
+                             GTK_EVENT_SEQUENCE_DENIED);
+      return;
+    }
+
   sequence = gtk_gesture_single_get_current_sequence (GTK_GESTURE_SINGLE (gesture));
   event = gtk_gesture_get_last_event (GTK_GESTURE (gesture), sequence);
   device = gdk_event_get_device (event);