From 53b35e60e3260f7a8fc51bed19b3b19217b2d1eb Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Martin=20Gr=C3=A4=C3=9Flin?= <mgraesslin@kde.org>
Date: Mon, 21 Mar 2016 16:24:59 +0100
Subject: [PATCH] Consider change in sub-surface tree as a full damage

A sub-surface changed in a way which needs a repaint. Of course only
if the surface is mapped.
---
 toplevel.cpp | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/toplevel.cpp b/toplevel.cpp
index af368b5fb8..73adbf68ef 100644
--- a/toplevel.cpp
+++ b/toplevel.cpp
@@ -451,6 +451,15 @@ void Toplevel::setSurface(KWayland::Server::SurfaceInterface *surface)
     }
     m_surface = surface;
     connect(m_surface, &SurfaceInterface::damaged, this, &Toplevel::addDamage);
+    connect(m_surface, &SurfaceInterface::subSurfaceTreeChanged, this,
+        [this] {
+            // TODO improve to only update actual visual area
+            if (ready_for_painting) {
+                addDamageFull();
+                m_isDamaged = true;
+            }
+        }
+    );
     connect(m_surface, &SurfaceInterface::destroyed, this,
         [this] {
             m_surface = nullptr;