From 6d0cb403a9e998fbd1d4d27421ccc8849d067965 Mon Sep 17 00:00:00 2001
From: New Pagodi <m0051@thaleswell.com>
Date: Sun, 8 Oct 2017 10:11:46 +0200
Subject: [PATCH] Prevent sending EVT_MOUSE_CAPTURE_LOST while opening a
 context menu in wxSTC

At least under wxMSW and wxGTK opening a popup menu when mouse is captured
generates EVT_MOUSE_CAPTURE_LOST. We would like to avoid this and
to release capture in a controlled way.

See #17961.
---
 src/stc/ScintillaWX.cpp | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/src/stc/ScintillaWX.cpp b/src/stc/ScintillaWX.cpp
index f9dbe55696..992f94cc64 100644
--- a/src/stc/ScintillaWX.cpp
+++ b/src/stc/ScintillaWX.cpp
@@ -1165,6 +1165,10 @@ void ScintillaWX::DoCommand(int ID) {
 bool ScintillaWX::DoContextMenu(Point pt) {
     if (ShouldDisplayPopup(pt))
     {
+        // To prevent generating EVT_MOUSE_CAPTURE_LOST.
+        if ( HaveMouseCapture() ) {
+            SetMouseCapture(false);
+        }
         ContextMenu(pt);
         return true;
     }